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Tkachuk, M. V., and Y. I. Pekhulia. "An adaptive prototyping approach to quality-aware software development." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46576.
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Cunha, Bruno Gomes. "Otimização no dimensionamento e sequenciamento de lotes de produção: estudo de caso em uma fábrica de blocos pré-moldados de concreto." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/5220.
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Previous issue date: 2014-08-30Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The work presented in this thesis concerns the problem of sizing and sequencing batch production, single level, skilled (CLSP), in a manufacturing plant precast concrete used in construction, where the sizing and sequencing of lots production in a given period, represent a challenge for the company, which in turn seeks to minimize the costs of production, inventory, setup and improve the level of service customers' demands. The problem consists in defining the size of lots and production sequence of several blocks precast concrete in a press line, with setup times too high. It was proposed, therefore, a mathematical model whose objective is to minimize the costs of production, setup and inventory, involved in the manufacturing process of these products through the exact method of Integer Linear Programming. The presented model aims to solve the problem was proposed and applied to the real situation of the company for the purpose of comparison of current results with the results after application of the model .
O trabalho que se apresenta nesta dissertação diz respeito ao problema de dimensionamento e sequenciamento de lotes de produção, único nível, capacitado (CLSP), em uma fábrica de produtos pré-moldados de concreto usados na construção civil, onde o dimensionamento e sequenciamento dos lotes de produção num período pré-definido, representam um desafio para a empresa; que por sua vez busca minimizar os custos de produção, estoque, setup e melhorar o nível de atendimento das demandas dos clientes. O problema consiste em definir o tamanho dos lotes e sequência de produção de diversos blocos pré-moldados de concreto em uma linha de prensagem, com tempos de setup muito altos. Será proposto, portanto, um modelo matemático cujo objetivo é minimizar os custos de produção, setup e estoque, envolvidos no processo de fabricação destes produtos através do método exato de Programação Linear Inteira. O modelo a ser apresentado visa resolver o problema proposto e será aplicado em situação real da empresa para fins de comparação dos resultados atuais com os resultados após aplicação do modelo.
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Cardoso, Guilherme Schwanke. "Impacto dos desvios de tensão de limiar induzidos por radiação ionizante no desempenho dos blocos básicos de dois amplificadores operacionais complementares." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/61871.
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Este trabalho estuda os efeitos de dose total ionizante (TID – Total Ionizing Dose) em amplificadores operacionais e em seus blocos básicos de construção. A radiação ionizante presente no espaço pode afetar o funcionamento das estruturas MOS, sendo que um dos parâmetros mais prejudicados é a tensão de limiar (Threshold Voltage). Em virtude da diferença nos mecanismos de aprisionamento de cargas nos óxidos dos transistores do tipo N e do tipo P, esses dois dispositivos exibem comportamentos distintos à medida que a dose acumulada aumenta referente à tensão de limiar. Por isso, foram investigados os comportamentos de dois tipos de amplificadores que podem ser ditos complementares entre si. Nesse contexto, através de simulações SPICE desvios na tensão de limiar foram promovidos através da injeção direta no arquivo de parâmetros da tecnologia considerada. Com isso, um conjunto de simulações foi feito para gerar a estimativa da tendência de comportamento de parâmetros que qualificam o desempenho dos amplificadores operacionais, como é o caso do produto ganho largura de banda (GB), ganho DC e THD (Total Harmonic Distortion). Nesse sentido, foi possível compreender os mecanismos associados à degradação de desempenho e concluir qual das duas arquiteturas pode apresentar melhor desempenho relacionado à TID.This work studies the effects of Total Ionizing Dose (TID) in operational amplifiers as well as in their basics building blocks. The radiation from space may affect functionality of MOS structures. One the most affected parameters is the threshold voltage. Due to the difference between N-type and P-type transistors related to the mechanism of charge trapping into the oxides, these two devices exhibit different behaviors, related to the threshold voltage parameter according to accumulated dose. Therefore, this work investigates the behavior of two counterpart operational amplifiers. In this context, by means of SPICE simulations, threshold deviations are injected into the transistors by modifying the technology models of the devices. Thus, a set of simulations was performed in order to generate an estimative of tendency for some of performance parameters of operational amplifiers, such as: the gain-bandwidth product (GB), DC gain, THD (Total Harmonic Distortion). In this sense, it was possible to understand the mechanisms associated to performance degradation and also, to conclude which of both architectures is more robust related to TID.
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Ah-Kee, Jean Alain. "Operation decomposition proof obligations for blocks and procedures." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330292.
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Santos, Carla Maria Lopes da Silva Afonso dos. "Error Orthogonal Models: Structure, Operations and Inference." Doctoral thesis, Universidade da Beira Interior, 2012. http://hdl.handle.net/10400.6/1742.
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In this thesis, we develop the theory of Error-Orthogonal Models availing ourselves of the identity of these models and those with Commutative Orthogonal Block Structure.
Thus our treatment will rest on the algebraic structure of the models.
In our development we consider: the estimation of variance components; crossing and nesting of models; model joining, in which observations vectors obtained separately are jointly analyzed; step nesting which require much less observations than the corresponding usual models.
To broaden our treatment we also consider L Extensions of Error-Orthogonal models. In this way, we may consider interesting cases such as models otherwise balanced with different numbers of replicates for the treatments.
Last we include normality. We will be interested in obtaining sufficient statistics as well as conditions for them to be complete. We will carry out inference and consider orthogonal L extensions.Nesta tese é desenvolvida a teoria dos modelos Error-orthogonal recorrendo à identidade entre estes modelos e os modelos com estrutura ortogonal de blocos comutativos. Desta forma, o tratamento apresentado irá assentar na estrutura algébrica dos modelos. No desenvolvimento considera-se: a estimação das componentes de variância; o cruzamento e aninhamento de modelos; a junção de modelos, na qual vectores das observações obtidos separadamente são analisados conjuntamente; aninhamento em escada, que requer muito menos observações do que os modelos correspondentes. Para alargar o tratamento apresentado consideram-se também Extensões L de modelos Error-orthogonal. Desta forma, poderemos considerar casos interessantes como o dos modelos com número diferente de repetições para os vários tratamentos. Por fim, inclui-se o caso normal. Com base no pressuposto da normalidade pretende-se obter estatísticas suficientes assim como condições para que estas sejam completas. É realizada inferência e consideram-se extensões L ortogonais.
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Siddique, Nafiul Alam. "Spare Block Cache Architecture to Enable Low-Voltage Operation." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/216.
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Power consumption is a major concern for modern processors. Voltage scaling is one of the most effective mechanisms to reduce power consumption. However, voltage scaling is limited by large memory structures, such as caches, where many cells can fail at low voltage operation. As a result, voltage scaling is limited by a minimum voltage (Vccmin), below which the processor may not operate reliably. Researchers have proposed architectural mechanisms, error detection and correction techniques, and circuit solutions to allow the cache to operate reliably at low voltages. Architectural solutions reduce cache capacity at low voltages at the expense of logic complexity. Circuit solutions change the SRAM cell organization and have the disadvantage of reducing the cache capacity (for the same area) even when the system runs at a high voltage. Error detection and correction mechanisms use Error Correction Codes (ECC) codes to keep the cache operation reliable at low voltage, but have the disadvantage of increasing cache access time. In this thesis, we propose a novel architectural technique that uses spare cache blocks to back up a set-associative cache at low voltage. In our mechanism, we perform memory tests at low voltage to detect errors in all cache lines and tag them as faulty or fault-free. We have designed shifter and adder circuits for our architecture, and evaluated our design using the SimpleScalar simulator. We constructed a fault model for our design to find the cache set failure probability at low voltage. Our evaluation shows that, at 485mV, our designed cache operates with an equivalent bit failure probability to a conventional cache operating at 782mV. We have compared instructions per cycle (IPC), miss rates, and cache accesses of our design with a conventional cache operating at nominal voltage. We have also compared our cache performance with a cache using the previously proposed Bit-Fix mechanism. Our result show that our designed spare cache mechanism is 15% more area efficient compared to Bit-Fix. Our proposed approach provides a significant improvement in power and EPI (energy per instruction) over a conventional cache and Bit-Fix, at the expense of having lower performance at high voltage.
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Jung, Seungwoo. "Optimization of SiGe HBT BiCMOS analog building blocks for operation in extreme environments." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54419.
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The objective of this research is to optimize silicon-germanium (SiGe) heterojunction bipolar transistor (HBT) BiCMOS analog circuit building blocks for operation in extreme environments utilizing design techniques. First, negative feedback effects on single-event transient (SET) in SiGe HBT analog circuits were investigated. In order to study the role of internal and external negative feedback effects on SET in circuits, two different types of current mirrors (a basic common-emitter current mirror and a Wilson current mirror) were fabricated using a SiGe HBT BiCMOS technology and exposed to laser-induced single events. The SET measurements were performed at the U.S. Naval Research Laboratory using a two-photon absorption (TPA) pulsed laser. The measured data showed that negative feedback improved SET response in the analog circuits; the highest peak output transient current was reduced by more than 50%, and the settling time of the output current upon a TPA laser strike was shortened with negative feedback. This proven negative feedback radiation hardening technique was applied later in the high-speed 5-bit flash analog-to-digital converter (ADC) for receiver chains of radar systems to improve SET response of the system.
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Yildirim, Hamdi Murat. "Algebraic Properties Of The Operations Used In Block Cipher Idea." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608289/index.pdf.
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In this thesis we obtain several interesting algebraic properties of the operations used in the block cipher IDEA which are important for cryptographic analyzes. We view each of these operations
as a function from $mathbb Z_{2}^n times mathbb Z_{2}^n to mathbb Z_{2}^n$. By fixing one of variables $v(z)=mathbf Z$ in $mathbb Z_{2}^n times mathbb Z_{2}^n$, we define functions $mathbf {f}_z$ and $mathbf {g}_z$ from $mathbb Z_{2}^n$ to $mathbb Z_{2}^n$ for the addition $BIGboxplus$ and the multiplication $BIGodot$ operations, respectively. We first show that the nonlinearity of
$mathbf {g}_z$ remains the same under some transformations of $z$. We give an upper bound for the nonlinearity of $mathbf {g}_{2^k}$, where $2leq k <n-1$. We list all linear relations which make the nonlinearity of $mathbf {f}_z$ and $mathbf {g}_z$ zero and furthermore, we present all linear relations for $mathbf {g}_z$ having a high probability. We use these linear relations to derive many more linear relations for 1-round IDEA. We also devise also a new algorithm to find a set of new linear relations for 1-round IDEA based on known linear relations. Moreover, we extend the largest known linear class of weak keys with cardinality $2^{23}$ to two classes with cardinality $2^{24}$ and $2^{27}$. Finally, we obtain several interesting properties of the set $ { ({mathbf X},{mathbf X} BIGoplus {mathbf A}) in mathbb Z_2^n times mathbb Z_2^n ,|, (mathbf {X}BJoin {mathbf Z})BIGoplus( ({mathbf X} BIGoplus {mathbf A} ) BJoin mathbf {Z} ) = {mathbf B} }$ for varying ${mathbf A}, {mathbf B}$ and ${mathbf Z}$ in $mathbb Z_2^n$, where $BJoin in { BIGodot,BIGboxplus }$. By using some of these properties, we present impossible differentials for 1-round IDEA and Pseudo-Hadamard Transform.
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Materano, Antonella. "The building blocks of social entrepreneurship: empirical model and framework." Master's thesis, NSBE - UNL, 2013. http://hdl.handle.net/10362/11631.
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A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and EconomicsThe purpose of this exploratory study is to identify a common path followed by social entrepreneurs, so as to build a comprehensive empirical model. The methodology used is qualitative interviews; in particular, semi-structured questions were addressed to a sample of ten social entrepreneurs, whose answers were transcribed and analysed. The main result is represented by a five-stage pattern followed by social entrepreneurs: each stage is firstly described and further linked to specific challenges that social entrepreneurs face and assets they need during the process. It is fundamental to highlight that some of these stages and challenges are peculiar to social entrepreneurship, differing from regular entrepreneurship. The key conclusion is that it is possible to identify a common pattern that could guide current and future social entrepreneurs. Furthermore, this research paper emphasises best practices and lesson learned from current social entrepreneurs by leaving a powerful heritage to who is interested in make a real change in society.
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Laforteza, Leonard D. "Inventory optimization of class IX supply blocks for deploying U.S. Marine Corps Combat Service Support Elements." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA333438.
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Litvay, Robyn Olson. "Development and Validation of a New Air Carrier Block Time Prediction Model and Methodology." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338750175.
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Strid, Jim. "Sovjetiska blockeringsoperationer i modern kontext." Thesis, Swedish National Defence College, Swedish National Defence College, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-818.
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1979 till 1989 pågick en sovjetisk militär insats i Afghanistan vars syfte var att bedriva upprorsbekämpning för att stödja den afghanska marionettregeringen. Efter 9/11 2001 blev Afghanistan återigen ett insatsområde för en amerikanskledd koalition vars syfte var att störta talibanerna och sätta en ny regering till makten. Som en följd av detta genomfördes flera markoperationer för att rensa upp de sista talibanska fästena. En av dessa operationer var Operation Anaconda. Men fanns och finns det fortfarande erfarenheter som från Sovjets insatser som kunde haft en effekt på denna operation samt liknande operationer? Syftet med denna uppsats är att utgå från de sovjetiska operationer Afghanistan 1979-1989 och påvisa framgångsfaktorer som kan användas på markoperationer inom ramen för upprorsbekämpning. Uppsatsen slutsatser pekar på att det finns framgångsfaktorer att dra av de sovjetiska erfarenheterna i områdena: Indirekt eld, den afghanska terrängen och lokalt understödjande förband, ledning, operationssäkerhet och principen för överraskning.
Between 1979 and 1989 there was an on going soviet military intervention which purpose was to battle insurgents in favour of the, by the Soviets, supported puppet government. After 9/11 2001 Afghanistan was once again a stage, bur for an American led coalition which purpose was to over throw the Taliban regime and install a new government. Because of this, several ground operations were conducted to clear out the last of the Taliban remnants. One of these operations was Operation Anaconda. But were there any experiences from the soviets operations that could have an effect on this and other operations? The purpose of this essay is to start from Soviet operations from 1979-1989 in Afghanistan and point out criteria’s of success that could be used on ground based operations within the context of counterinsurgency. The result of the essay points out that there is criteria’s of success to be found in the experiences from the Soviets operations in the fields of: Artillery, Afghan terrain and local supportive units, command and control, operational security and the principle of surprise.
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Vemulapalli, Revanth, and Ravi Kumar Mada. "Performance of Disk I/O operations during the Live Migration of a Virtual Machine over WAN." Thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2443.
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Virtualization is a technique that allows several virtual machines (VMs) to run on a single physical machine (PM) by adding a virtualization layer above the physical host's hardware. Many virtualization products allow a VM be migrated from one PM to other PM without interrupting the services running on the VM. This is called live migration and offers many potential advantages like server consolidation, reduced energy consumption, disaster recovery, reliability, and efficient workflows such as "Follow-the-Sun''. At present, the advantages of VM live migration are limited to Local Area Networks (LANs) as migrations over Wide Area Networks (WAN) offer lower performance due to IP address changes in the migrating VMs and also due to large network latency. For scenarios which require migrations, shared storage solutions like iSCSI (block storage) and NFS (file storage) are used to store the VM's disk to avoid the high latencies associated with disk state migration when private storage is used. When using iSCSI or NFS, all the disk I/O operations generated by the VM are encapsulated and carried to the shared storage over the IP network. The underlying latency in WAN will effect the performance of application requesting the disk I/O from the VM. In this thesis our objective was to determine the performance of shared and private storage when VMs are live migrated in networks with high latency, with WANs as the typical case. To achieve this objective, we used Iometer, a disk benchmarking tool, to investigate the I/O performance of iSCSI and NFS when used as shared storage for live migrating Xen VMs over emulated WANs. In addition, we have configured the Distributed Replicated Block Device (DRBD) system to provide private storage for our VMs through incremental disk replication. Then, we have studied the I/O performance of the private storage solution in the context of live disk migration and compared it to the performance of shared storage based on iSCSI and NFS. The results from our testbed indicate that the DRBD-based solution should be preferred over the considered shared storage solutions because DRBD consumed less network bandwidth and has a lower maximum I/O response time.
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Staurset, Ove. "Three block war : en metafor for dagens og morgendagens stridsfelt for militære styrker." Thesis, Försvarshögskolan, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-1627.
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USA er i krig og krig fører normalt til forandringer for bruk av militær makt. De fleste av de vestligeland er iferd med å gjennomføre en omfattende omlegging av sine forsvar. General Charles C. Krulakbeskriver Three Block War. Der han metaforisk så for seg en kompleks kamparena, ikke ulik den deamerikanske styrkene møtte i den irakiske byen Fallujah.Hensikten med studien er å øke kunnskapen om Three Block War, da metaforen synes å være en godillustrasjon av dagens og morgendagens oppgavespekter komprimert i tid og rom. Studien har somambisjon å gi inspirasjon og refleksjon til omorganiseringen av de militære styrker i fremtiden samt tafrem konsekvenser for småstaten, hvis den skal operere som metaforen billedlig beskriver.Studien besvares ved å granske følgende tre spørsmålsstillinger:• Hva menes med metaforen Three Block War?• I hvilken grad kan vi finne igjen Three Block War innenfor rammen av stabiliseringsperioden iIrak med vekt på operasjonene i byen Fallujah?• Hvilke konsekvenser kan det få for militære styrker, hvis de skal operere i stridsmiljøet somThree Block War beskriver?Studien bruker en abduktiv metode og operasjonaliserer metaforen fra tre perspektiv: Low tech-, hightech- and multi-dimensjonale operasjoner.Gjennom diskusjonen er metaforen testet mot andre militære tanker og resultatet viser en tett militær ogpolitisk sammenheng. En sammenheng som kanskje ikke kan kalles ny, men implikasjonene avresultatet fører til hjertet av militær teori og praktikk.Vedlegg A: Abstract, Vedlegg B: Forkortningsliste, Vedlegg C: Kart og bilder av Fallujah, Vedlegg D;White Letter NO. 3-98Avdelning: ALB - Slutet Mag 3 C-uppsHylla: Upps. ChP 03-05
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Saidhidayat, Andie Pramudita. "CAPACITATED ARC ROUTING PROBLEMS IN OPENING ACCESS BY DEBRIS COLLECTION OPERATION IN DISASTERS." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/180487.
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Hu, Xinran. "Function Block Algorithm for Operation Planning on Cloud-DPP System : A case study of turbine disc from Sandvik Coromant." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226321.
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The project presented in this report is the outcome of a Master of Science thesis project which has been accomplished at Sandvik Coromant in Sandviken, Sweden. This Master’s thesis is part of a long-term effort devised by Sandvik Coromant, related the European research project CAPP-4-SMEs, which is a function block based on approach for distributed process planning combined with cloud manufacturing. The purpose of long-term version in Sandvik Coromant is to develop an industrial demo prototype system for agile process planning with embedded flexibility that also will enable implementation of functionalities for real time adaptation and control. This thesis project, as a part of the Sandvik Coromant major project, focused on operation planning part, analyzed and developed a demo software to implement it. Shop-floor uncertainty is an inevitable problem in manufacturing, especially in today’s market, the needs of customized products and service has greatly increased. How to improve production adaptability and reduce the time to deal with dynamic factors in production has become one of the core issues in the international industrial fields. In this Master of Science thesis project, the challenges of low adaptability in current process planning are discussed. In order to meet these challenges, the concept “Cloud DPP (Cloud - Distributed Process Planning)” combined with Function Block (FB) technology is applied to establish a process planning system that enables high degree of flexibility, automation as well as efficient resource sharing, scalability and accessibility regarding IT-systems and software applications. Taking a specific turning feature in aerospace engine as a case study, this project designs two schemes of integrated FB and distributed FB respectively. Two software demos are built, and the differences of modularization, accuracy and scalability are compared between the two systems. The result verifies the fact that the use of FB algorithm and cloud-DPP method significantly improves the adaptability of the process planning. In FB method, the distributed FB software system has better modularity and scalability.Projektet som presenteras i denna rapport är resultatet av ett magisterprojekt som har genomförts på Sandvik Coromant i Sandviken. Mastersuppsatsen är en del av en långsiktig insats som Sandvik Coromant har utformat relaterat till det europeiska forskningsprojektet CAPP-4-SME, vilket bygger på en funktionsblocksbaserad strategi för distribuerad processberedning kombinerad med cloud teknologi. Syftet med magisterprojektet vid Sandvik Coromant är att utveckla en demonstratör prototyp för agail processberedning med inbyggd flexibilitet och möjlighet att implementera funktionalitet för realtidsanpassning och styrning. Behovet av kundanpassade produkter och tjänster kommer kraftigt att öka. Detta kommer i sin tur att medföra krav på hög flexibilitet, korta ledtider och förmåga att hantera dynamiska förändringar i produktionssystemen. I denna magisteruppsats addresseras utmaningarna i dagens produktionsberedningsprocesser som i hög grad kännetecknas av statisk karaktär med begränsad förmåga att snabbt anpassas till dynamiska förändringar. I syfte att möta dessa utmaningar tillämpas inom detta projekt konceptet “Cloud-DPP (Cloud - Distributed Process Planning)" kombinerat med Function Block (FB) teknologin för att upprätta ett beredningssystem som möjliggör hög grad av flexibilitet, automation, samt förmåga till bättre resursutnyttjande och skalbarhet avseende IT system, digitala tjänster och programvaror. En rotationssymmetrisk komponent inom flygindustrin har här används som fallstudie. Två mjukvarudemonstratorer har utvecklats avseende dels ett integrerat FB schema, dels ett distribuerat FB schema. Skillnader avseende modularisering, noggrannhet och skalbarhet mellan de olika scheman har analyserats. Resultaten verifierar det faktum att användningen av FB algoritm och Cloud-DPP signifikant förbättrar anpassningsbarheten i beredningsprocessen. Beträffande FB metoden så ger det distribuerade FB schemat bättre modularitet och skalbarhet.
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Poser, Wiebke [Verfasser]. "Veränderungen der autonomen Regulation durch intravenöse ß-Adrenorezeptor-Blocker-Infusion bei Patienten mit kardiovaskulären Operationen / Wiebke Poser." Kiel : Universitätsbibliothek Kiel, 2015. http://d-nb.info/1073868427/34.
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Naldini, Federico. "Algoritmi Euristici per la Schedulazione degli Interventi nel Blocco Operatorio." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11685/.
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Questa tesi riguarda il problema della schedulazione degli interventi nel blocco operatorio di un presidio ospedaliero, noto anche come Operating Theatre Planning & Scheduling. Il blocco operatorio è la struttura che eroga servizi a più alto impatto sui costi di un presidio ospedaliero ed è legato ad attività ad alto rischio. E' quindi fondamentale gestire in modo ottimale questa risorsa.
In questa tesi, si considera come caso studio l'applicazione reale di un presidio ospedaliero dell'Emilia Romagna con un orizzonte temporale di una settimana, ovvero la cosiddetta programmazione operativa. L'obiettivo è quello di ottenere un utilizzo efficiente del blocco operatorio, garantendo al contempo la priorità agli interventi più urgenti.
Data la complessità del problema, vengono proposti algoritmi euristici che permettano di ottenere buone soluzioni in tempi di calcolo ridotti. Studi precedenti hanno infatti evidenziato la difficoltà di trovare soluzioni ottime al problema, mediante l'utilizzo di solver commerciali per modelli di Programmazione Lineare Intera, senza introdurre ipotesi semplificative.
Sono stati elaborati tre algoritmi euristici costruttivi di tipo multi-start che permettono di generare soluzioni ammissibili con diverse caratteristiche. Gli algoritmi si differenziano principalmente per le modalità con cui collocano gli interventi nel tempo disponibile delle risorse (induction room, operating room, recovery room), cercando di migliorarne l’utilizzazione e dando priorità ai pazienti più urgenti.
Gli algoritmi sono stati implementati utilizzando il linguaggio JAVA e sono stati testati su istanze realistiche fornite dal presidio ospedaliero. I risultati hanno evidenziato un alto grado di utilizzazione delle sale operatorie, un fattore molto rilevante per una ottimale gestione del blocco operatorio.
E' stata, infine, svolta un'analisi di sensitività alla variabilità delle durate.
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Magula, Filip. "Software pro zpracování retinálních snímků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218653.
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This thesis deals with practical solutions of software for retinal images digital processing. The theoretic part describes human eye and retinal anatomy and also glaucoma disease. It is also focused on description of method for retinal nerve fiber layer enhancement and analysis. These enhancement are then used for designing of automated image processing. One chapter is devoted to detection and analysis of retinal nerve fibers layer. The practical part includes the user manual for application Image Blockz, which was established within this thesis. Further practical part contains the programmer's manual describing the basic structure of the program and its possible extensions.
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Ferreira, Marcus Augustus Alves. "Metodologia para o rateio do bloco hidráulico no planejamento hidrotérmico de médio prazo." Universidade Federal de Juiz de Fora (UFJF), 2010. https://repositorio.ufjf.br/jspui/handle/ufjf/2558.
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A eficiência na operação de sistemas predominante hidrotérmicos, como o Sistema Interligado Nacional brasileiro (SIN), é estreitamente relacionada à execução de um planejamento da operação consistente. Os modelos de decisão estratégica usados em estudos de médio prazo são capazes de determinar a política operativa que minimiza os custos de operação e o risco de déficit usando uma modelagem a sistemas equivalentes de energia. Este trabalho trata de uma proposta para ser acoplada, pela função de custo futuro esperado da operação, a um modelo de decisão estratégica, de modo a permitir a desagregação dos subsistemas nos seus reservatórios individuais, para cada mês e seqüência hidrológica. Assim, a proposta é desenvolver um modelo que seja capaz de verificar se as metas globais da geração dos subsistemas, fornecidas pelos os modelos de decisão estratégica, são alcançáveis. Para tanto, a ferramenta desagrega a solução encontrada para os sistemas de equivalentes de energia na operação a usinas individualizadas. A metodologia possui dois módulos: no primeiro é realizado o despacho dos sistemas equivalentes de energia uma rotina iterativa de programação linear e achadas as metas globais de geração para cada um deles, considerando as funções de custo futuro esperado da operação e o intercâmbio da energia entre subsistemas. O segundo módulo é um otimizador não-linear do despacho mensal das usinas hidrelétricas de cada subsistema isoladamente, que tenta alcançar as metas de geração do módulo anterior, maximizando o volume armazenado dos reservatórios. A inovação deste modelo está no módulo de simulação a usinas individualizadas, que não é baseado em regras heurísticas, mas em uma rotina de programação não-linear (PNL). O uso de técnicas de otimização diminui a interferência do usuário no processo de simulação, uma vez que seu conhecimento é baseado na experiência adquirida ao longo do histórico da operação. Além disso, a proposta dispensa a adaptações quando novas políticas operativas forem adotadas. Assim, este modelo, quando estiver completo e validado, poderá despontar como uma alternativa ao modelo de simulação oficial utilizado pelo Setor Elétrico Brasileiro (SEB), cujo módulo de simulação a usinas individualizadas é baseado em uma política de operação paralela dos reservatórios.
The efficiency in the operation of predominantly hydrothermal systems, as the Brazilian Interconnected System (SIN), is closely related to the execution of a consistent operation planning. The strategical decision models used in long term studies are capable to determine the operative politics that minimizes the operation costs and the risks of deficit by using an energy equivalent reservoirs modeling. This work deals with a proposal that may be coupled to a strategical decision model by the expected cost to go function, in order to allow the disaggregation of the subsystems’ into its the individual reservoirs, for every month and for each streamflow sequence. So, the proposal is the development of a model where it is possible to verify if the subsystems’ generation global goals, supplied for the strategical decision models, are reachable. To work in such way, the tool disaggregates the solution found for the energy equivalent systems to the individualized plants. The methodology has two modules: in the first one the optimal dispatch of the energy equivalent subsystems is done with an iterative linear programming routine and the global generation goals for each one of the subsystems are found, considering the energy interchange between them. The second module, is an individualized plants nonlinear optimizer modeled for dispatching the hydroelectric plants of each subsystem separately, in order to try to reach the generation goals defined by the previous module and to maximize the reservoirs’ levels. The innovation of this model is the individualized plants simulation module, which is not based on heuristic rules, but in a nonlinear programming routine (NLP). The use of optimization techniques diminish the interference of the user in the simulation process, since his knowledge is usually based on the experience acquired throughout the operation history. Moreover, the methodology dismisses the adaptation of the model whenever new operative politics are adopted. Thus, this model, after the validation process, may dawn as an alternative to the simulation model that is officially used by the Brazilian Electrical Sector (SEB), whose individualized plants simulation module is based on the politics of the parallel operation of the reservoirs.
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Škoda, Martin. "Implementace symetrické blokové šifry AES na moderních procesorech." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220616.
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The main aim of master's thesis is usage of new instructions from instruction set called Intel® Advanced Encryption Standard New Instructions (AES-NI), which is available on processors with code name Westmere and newer. In theoretical part, there are described symmetric block ciphers and their operational modes. Cipher AES is described in details, especially used block transformations, key expansion and equivalent inverse cipher. Next topic is description of instructions of AES-NI instruction set – their function is explained using pseudo codes of instructions and there are examples of their usage in code. Further in work, dynamic-link library is created, which implements cipher AES with key sizes 128, 192 and 256 bites and implements operational modes described in theoretical part. Library functions are called from Matlab by scripts and their functionality is proved by checking test vectors values, which are provided in publications of National Institute of Standards and Technology.
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Chraibi, Abdelahad. "A decision making system for operating theater design : application of facility layout problem." Thesis, Saint-Etienne, 2015. http://www.theses.fr/2015STET4017/document.
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Dans les dernières décennies, l'augmentation de la consommation des services de soins et la croissance de la population ont fait de l'élimination du gaspillage et l'amélioration continue de la productivité de plus en plus cruciale pour les hôpitaux. La productivité et l'efficacité d'un hôpital dépendent des conditions de travail des soignants qui sont influencés fortement par l'organisation des lieux de travail et des installations [Dares (2013)]. L’agencement des installations consiste à "déterminer l'organisation physique d'un système de production et de trouver l’arrangement le plus efficace de ‘n’ installations dans ‘n’ positions" [Singh et Sharma (2006)]. L’agencement des installations a un grand impact sur la productivité et l'efficacité du fonctionnement d'un hôpital. Etant conscient de ce besoin, le travail que nous présentons vise à trouver une solution à l’agencement des salles du Bloc Opératoire "le coeur de l'hôpital", ainsi que les salles annexes en proposant un outil intelligent que nous mettons à la disposition des maitres d’ouvrages pour optimiser leur conception du bloc opératoire. Les méthodes que nous avons explorées pour la réalisation de ce travail sont les méthodes exactes, les heuristiques, les métaheuristiques et les méthodes intelligentes, ce qui nous a permis de comparer les différentes approches afin de fournir la meilleure solution pour différents scénarios de problèmes. Nous présentons les contributions majeures de notre travail, à commencer par l'application de la programmation mathématique en nombres entiers mixtes (Mixed Integer Programming (MIP)) pour résoudre le problème d’agencement du bloc opératoire (Operating Theater Layout Problem (OTLP)) comme la première contribution scientifique. Ce travail considère trois structures différentes (multi-section, multi-étage et multi-rangé) dans deux types d'environnement différents, tout en optimisant deux fonctions objectifs différents. La combinaison de ces différentes composantes donne lieu à neuf modèles MIP pour résoudre l’OTLP pour lesquels une solution optimale a été atteinte pour des problèmes avec jusqu'à quarante salles. L'utilisation de Systèmes Multi-Agents (MAS) pour résoudre le problème d’agencement des installations est la deuxième contribution scientifique que nous présentons dans le cinquième chapitre. Dans la littérature, on retrouve un seul travail [Tarkesh et al., (2009)] ayant appliqué le MAS pour résoudre des problèmes de petites tailles, ce qui rend notre travail, le premier adoptant MAS pour répondre à la fois le FLP sous environnement statique et dynamique pour des problèmes de grande taille en utilisant un algorithme en trois étapes pour résoudre OTLP. La plate-forme multi-agents développée exploite les trois différents protocoles de communication d’agents, à savoir la coordination, la coopération et la négociation pour concevoir différentes architectures d’agents afin de faire face à l’OTLP statique et dynamique. La dernière contribution consistant en l'utilisation de l’optimisation par essaim de particules (Particle Swarm Optimization (PSO)) sous une représentation continue de l’espace de recherche pour résoudre le problème d’agencement multi-rangée est présentée dans le sixième chapitre. Puisque la PSO est généralement utilisé pour résoudre les problèmes d’affectation ou les FLP avec une représentation discrète, la formulation actuelle est parmi les rares travaux traitant la représentation continue du FLP. Nous avons conçu une nouvelle technique de codage des particules et des heuristiques appropriées pour générer des solutions initiales et pour effectuer la procédure de recherche locale. Une autre nouveauté est liée à l'application de la PSO à un problème de structure multi-rangé, qui n'a pas été abordé auparavant car à notre connaissance, les travaux avec la PSO ont formulé le FLP comme une structure d’une seule rangée ou dans le meilleur des scénarios, comme une structure à deux rangéesIn the last decades, the important increasing consumption of health care and the growing of population make elimination of waste and continuous productivity improvement more and more critical for hospitals to provide their care services effectively and efficiently. The productivity and efficiency of a hospital depends on the caregivers working conditions, which are impacted greatly by the work place and the facilities organization [Dares (2013)]. Facilities planning “determines the physical organization of a production system and finding the most efficient arrangement of ‘n’ indivisible facilities in ‘n’ locations” [Singh & Sharma (2006)]. Thus, facilities planning has a great impact on the productivity and efficiency of running a hospital. Being aware of this need, the work we present aims to find a solution to facilities planning for the Operating Theater “the heart of hospital” by proposing an intelligent tool we make available to decision makers for optimizing their operating theater design. Our research work focuses on the use of operational research methods in order to find a solution for this optimization problem. Methods we explored for the realization of this work were variant, namely exact algorithm, heuristics, metaheuristics and intelligent methods, which allow us to compare different issues in order to provide the best solution to different scenarios of problems. Thus, in this dissertation we present the major contribution of our work, starting with the application of Mixed Integer Programming (MIP) to solve Operating Theater Layout Problem (OTLP) as the first scientific contribution. This work considers three different formulations (i.e. the multi-sections, the multi-floors and the multi-rows) in two different environment types (i.e. static and dynamic) while optimizing two different objective functions (i.e. to minimize the total traveling cost and to maximize the total adjacency rate). The combination of these different components gives rise to nine MIP models to solve the OTLP for which optimal solution was provided to problems with until forty facilities. These contributions are presented in the third and fourth chapters. The use of Multi-Agent System (MAS) to solve Facility Layout Problem (FLP) is the second scientific contribution we present in chapter five. In literature, only one work [Tarkesh et al., (2009)] applied the MAS to solve small sized problems, which makes our work the first one adopting MAS to address both the static and dynamic FLP for large sized problems using a novel algorithm running in three steps to solve OTLP. The developed multi-agent platform exploit the three different agents’ protocols of communication, namely coordination, cooperation and negotiation to conceive different agents’ architectures to deal with the static and dynamic OTLP. The last contribution consisting on the use of Particle Swarm Optimization (PSO) under continuous layout representation to solve multi-rows FLP is presented in chapter six. Since the PSO is generally used to solve assignment problems or discrete FLP, the actual formulation is among the few works dealing with the continuous one. This leads us to conceive a novel encoding technique and the appropriate heuristics to generate initial solutions and to perform the local search procedure. Another novelty is related to the application of PSO to a multi-rows layout problem, which was not addressed before. To the best of our knowledge, PSO works usually formulate the FLP as a single row or in the best of scenarios, as a double-rows problem
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Štěrba, Václav. "Návrh 10-ti kanálového equalizeru s optimalizací kmitočtové charakteristiky a spektrálním audio-analyzátorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219896.
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This work deals with the design of a 10-zones equalizer with optimized frequency characteristics with a spectrum audio analyzer. In this work the problem of processing audio signals using equalization for filtering the interference frequencies, correction of frequency cover signal boost or suppression of the required zones of the audible spectrum are also analyzed. The influence of subjective perception of sound intensity of the audio signals reproduction and its use in working with equalizer is discussed too. The work describes the principles and usage of the audio-analyzer as a tool for the optimization of the audio equalization setting when ensuring the appropriate listening conditions of music reproduction, spoken word, sounds, etc. It also focuses on the signal source for testing audio-chains, their generation and measurement using the audio analyzer. The equalizer equipment, audio-analyzer generator of reference signals equipment and power supply are designed as a single unit.
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Joseforsky, David C., and Gilbert O. Garcia. "Transformational communications architecture for the Unit Operations Center (UOC), Common Aviation Command and Control System (CAC2S), and Command and Control On-the-Move Network, Digital Over-the-Horizon Relay (CoNDOR)." Thesis, Monterey California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1586.
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Approved for public release, distribution is unlimitedThe purpose of this research was to introduce a Transformational Communications Architecture for the Unit Operations Center (UOC); Common Aviation Command and Control System (CAC2S); and Command and Control On-the- Move Network, Digital Over-the-Horizon Relay (CoNDOR). The methodology used was to conduct Field Tests with government contractors and private vendors in order to demonstrate the capabilities of each wireless technology researched. These wireless technologies, Free Space Optics (FSO), Microwave, 802.16, 802.11b over SecNet-11, Orthogonal Frequency Division Multiplexing (OFDM), Broadband Satellite, INMARSAT, and Iridium, all have the potential of being implemented in the transformational communications architecture for intra-nodal and inter-nodal links for UOC and CAC2S, as well as the CoNDOR communications architecture. The ultimate goal of this research was to introduce different technologies that offer more flexibility, mobility, and capability at the tactical level giving the Marine Corps the tactical wireless edge. Throughout this research, the focus revolved around testing equipment and network configurations in an IP network. Special consideration was given to wireless issues for the UOC, CAC2S, and CoNDOR, which could improve line-of-sight, beyond line-of-sight, and over-the-horizon communications for each program. These new technologies will transform communications in the United States Marine Corps for the 21st century.
Captain, United States Marine Corps
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Pavlíček, Tomáš. "Slovinské národní divadlo v Lublani." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2009. http://www.nusl.cz/ntk/nusl-215579.
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Slovene national theatre in the centre of Ljubljana as a part of existing city block. The composition of buildings creates new urban areas as a continuation of the urban axis of Josip Plečnik. The basic principle was to resolve the issues of entry into building, the definition and organization of space inner block, the creation and cultivation of new and existing urban areas. Unifying element of the whole composition is solution to the facade, which paraphrases the high order, typical for the surrounding buildings and significant not only for cultural buildings. As a contrast to massive and heavy mass of facade stand glass facade which makes lighter impression. White facade adds significance to the composition.
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Benelle, Cristina Aparecida. "Efeitos de sistemas de operação e condições ambientais na abundância de Hoplias aff. malabaricus (Bloch, 1794) em reservatórios neotropicais: um estudo de caso no Rio Iguaçu." Universidade Estadual do Oeste do Parana, 2010. http://tede.unioeste.br:8080/tede/handle/tede/1969.
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Previous issue date: 2010-09-27This study aimed to investigate regulatory mechanisms of an abundance of piscivorous fish in Neotropical reservoirs, and the effects of different types of operating systems. For the study were collected bimonthly from July 2003 to January 2010 fish and limnological variables, sampled at seven locations, four in Salto Santiago reservoir and three in the Salto Osório reservoir. The sampling of fish were taken with gillnets with different mesh size (between 2.4 and 16.0 cm) and trammel net (between 6.0 and 8.0 cm) opposite knots, exposed for 24 h. Abiotic variables such as water temperature, dissolved oxygen, conductivity, pH and water transparency were measured in situ with portable equipment, for the other analysis was collected with the aid of water bottle of Van Dorn, used in subsequent analysis performed in the laboratory. In order to evaluate the effect between the biotic (CPUE transformed into log (x +1)), abiotic, operating systems and sampling in the marginal areas, data were submitted to multiple regression (backward stepwise) with variables indicator, and used the correlation matrix between the predictor variables in order to check possible sources of multicollinearity. Chemical analysis performed was found that the species showed different patterns of abundance in the reservoirs, as well as their prey, which was possibly a reflection of operating systems, also showing an increase in the abundance of species in the marginal area.
Esse trabalho teve por objetivo investigar mecanismos reguladores da abundância populacional Hoplias aff. malabaricus em reservatórios neotropicais, bem como os efeitos dos diferentes tipos de sistemas de operação. Para iss os peixes e variáveis limnológicas foram coletados bimestralmente entre julho de 2003 à janeiro de 2010 de peixes e variáveis limnológicas, amostrados em sete locais, sendo quatro no reservatório de Salto Santiago e três no reservatório de Salto Osório. As amostragens de peixes ocorreram com redes de espera simples de malhas 2,4 a 16 cm e tresmalhos de 6 a 8 cm de entre nós não adjacentes, expostas por 24 h. Variáveis abióticas como: temperatura da água, oxigênio dissolvido, condutividade elétrica, pH e transparência da água foram medidos "in situ" com equipamentos portáteis e, para as demais análises, a água foi coletada com auxílio de garrafa de Van Dorn, utilizada em análises posteriores efetuadas em laboratório. Com a finalidade de avaliar o efeito entre os fatores bióticos (CPUE transformados em log(x+1)), abióticos, sistemas de operação e amostragens na área marginal, os dados foram submetidos ao procedimento de regressão múltipla (backward stepwise) com variáveis indicadoras, sendo usada a matriz de correlação entre as variáveis preditoras a fim de verificar possíveis fontes de multicolinearidade. Através das análises realizadas foi verificado que a espécie apresentou diferentes padrões de abundância nos reservatórios, assim como suas presas, o que possivelmente foi reflexo dos sistemas de operação, mostrando também um incremento na abundância da espécie na região marginal.
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Nguyen, Francois. "Cooper pair box circuits : two‐qubit gate, single‐shot readout, and current to frequency conversion." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00390074.
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During this thesis, we have used superconducting circuits with Josephson junctions, derived from the Cooper pair box, in order to implement quantum bits (qubits). To implement two-qubit gates, we have developed a new circuit, the quantroswap, which consists in two capacitively coupled Cooper pair box, each of them being manipulated and read separately. We have demonstrated coherent exchange of energy between them, but we have also observed a problem of qubit instability.
In order to avoid this spurious effect, we have implemented another circuit based on a charge insensitive split Cooper pair box coupled to a non-linear resonator for readout-out purpose. We have measured large coherence time, and obtained large readout fidelity (90%) using the bifurcation phenomenon.
For metrological purpose, microwave reflectometry measurement on a quantronium also allowed us to relate an applied current I to the frequency f=I/2e of induced Bloch oscillations.
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Olofsson, Clas. "Klassiska sjökrigsteoretiker och deras relevans i Falklandskriget 1982." Thesis, Swedish National Defence College, Swedish National Defence College, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-47.
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De klassiska sjökrigsteorierna har åtskilliga år på nacken. Fortfarande anses emellertid Julius S. Corbetts och Alfred T. Mahans idéer äga sin giltighet – trots att den tidigare var verksam under första halvan 1900-talet och den senare under framförallt den andra halvan av 1800-talet. Syftet med arbetet har varit att undersöka huruvida dessa teoretikers syn på strategier i sjökriget som fenomen kan anses relevanta i det moderna sjökriget. Slaget om Falklandsöarna i början 1980-talet har betecknats som en av de första drabbningarna till sjöss som utspelats i en modern telekrigsmiljö. Utgångspunkt har varit att studera i vilken utsträckning Corbetts och Mahans teorier kan skönjas i utförandet av den brittiska operationsplanen i Falklandskriget. Genom en kvalitativ textanalys av Mahans och Corbetts litterära verk, och litteratur om dessa, har adekvata indikatorer tagits fram. Dessa har jämförts med en fallstudie som utgjorts av Falklandskriget. Slutsatsen blev att teorierna – och då framförallt Corbetts tankar – äger sin giltighet, om än inte bokstavligen och i varje detalj, men som en övergripande förklaring på vilket sätt framgång i modern sjökrigsföring kan uppnås.
The classic naval theories have been around for a considerable sum of time. Despite of these circumstances the ideas of Julius S. Corbett and Alfred T. Mahan are still regarded to be obligated their validity – even though that the foremost of them was active under the first part of the 1900 and the latter active particularly during the second part of the 1800. The purpose of the paper has been to examine whether these naval thinker view on strategy in naval warfare could be considered to be relevant in the modern naval warfare. The battle for the Falklands islands in the beginning of 1980 have been designated as one of the first encounters on the high seas that was situated in a modern electronic warfare environment. The starting point has been to study in which extension Corbett’s and Mahan’s theories could be notices in the execution of the British campaign plan in the Falklands war. Through a qualitative text study of Mahan’s and Corbett’s literary creation, and literature about them, adequate indicators have been brought forward. These have been comprehended with a case study consisting of the Falklands war. The conclusion where that the theories – particularly Corbett’s thoughts – still posses, if not figuratively and in every aspect, but as an overlooking clarification through in which way the success in modern navel warfare ought to be accomplished.
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Al, hasan Hasan. "Surgical case scheduling with medical instruments sterilizing activities constraints." Thesis, Angers, 2019. http://www.theses.fr/2019ANGE0025.
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Les blocs opératoires sont l’un des principaux postes de dépenses du système hospitalier, rationaliser et optimiser leur gestion permet donc une réduction des coûts pour la structure. S’aidant de l’unité de chirurgie orthopédique du CHU d’Angers, nous proposons donc des outils d’aide à la planification des interventions chirurgicales prenant aussi en compte les contraintes liées à la stérilisation d’instruments médicaux tels que les kits d’intervention. Le but de ces outils est de baisser les coûts de fonctionnement des blocs opératoires, optimiser le recours aux heures supplémentaires et les stérilisations de matériels en urgence, etc. Nous considérons premièrement que toutes les données sont connues et nous proposons un modèle de type MILP et une heuristique de construction de solutions dont les résultats obtenus améliorent la planification du CHU. Nous adaptons ensuite une approche permettant d’assimiler l’arrivée dynamique des patients et montrons, résultats à l’appui, que cette technique permettrait d’améliorer le processus de prévision des opérations du bloc, si les durées opératoires sont connues. Cette dernière hypothèse ne tenant pas dans le cas réel, nous suggérons de la lever en proposant de robustifier tout d’abord notre approche statique de deux façons que nous adaptons au cas dynamique. A l’issue de ces travaux, une amélioration de 54% est constatée du processus de planification en termes d’heures supplémentaires tout comme une réduction du nombre de stérilisations à effectuer dans l’urgence (90%) et d’une hausse significative du taux d’occupation des blocs opératoires (5.7%)The operating theater is considered as the most expensive and important resource in hospitals as it counts as the main source of income and expenses. This critical rule and the increase in costs urge hospitals to organize their processes more efficiently and effectively. In this thesis, we will be working with the Centre Hospitalier Universitaire d’Angers (CHU) of Angers in France. We focus on the surgery scheduling problem at the orthopedic surgery unit. The main contribution of this work is the consideration of the activities of the sterilizing unit as a hard constraint and a performancemeasure for the problem. In the first part of this work, we present a multidimensional classification of the current literature on the surgical case scheduling problem. In the second part, we solve the deterministic version of the problem. Starting with the static problem, we propose a MILP and a constructive heuristic and show that the obtained results significantly improve over the ones of the CHU.Next, we solved the deterministic dynamic version by implementing our MILP in a rolling horizon approach. Again, the results were superior to the CHU ones. We then showed that a non-deterministic approach is a must due to the big degradations caused by surgeries duration uncertainties. In the third part, we tackled the non-deterministic version of the problem. Similarly, we started with the static problem and proposed two robust models. Finally, we implement both robust models in a rolling horizon method to solve the dynamic scheduling problem. The results of the both non-deterministic versions show much more robustness compared to the deterministic ones and better values overall
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Imaev, Aleksey A. "Hierarchical Modeling of Manufacturing Systems Using Max-Plus Algebra." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1257871858.
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Stehlík, Jiří. "Obvody s proudovou zpětnou vazbou pro zpracování analogových signálů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233459.
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This dissertation thesis deals with design of new functional blocks usable in area of analogue signal processing, focusing on sensor signal processing. Versatility of these circuits will find applications in programmable analogue array structures that will be possible to control and configure via a digital signal. Hereby build-up array would be fully a reconfigurable digital control system for sensor signal processing and usable for a wide range of different sensors. It offers possibility to build-up a control code for each specific sensor system, with which it would be possible to achieve optimal results of the entire system and consequently place the system on a chip. The presented programmable array is designed from configurable analogue blocks. The current feedback circuits, which in a suitable configuration can operate in voltage or current mode, are used here. This allows to achieve very good results in the systems with very low power supply, which is closely associated with mobility and autonomous behavioral (that are very important and observed parameters today) of the entire sensor-based framework. The work deals in detail with particular blocks, which are described theoretically and evaluated for using in the programmable analogue array. Design of the structure of programmable analogue array as well the use of these circuits in the part of whole system (that will be realized on a chip) are presented at the end of this thesis.
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Ramdane, Yassine. "Big Data Warehouse : model de distribution des cubes de données à la volée." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE2099.
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Le partitionnement et la distribution des données ont été largement utilisés dans les systèmes "shared nothing systems", plus particulièrement dans les systèmes distribués qui utilisent le paradigme MapReduce, tels que Hadoop et Spark. Ils ont été utilisés pour l’équilibrage des charges de données, pour éviter le chargement des partitions inutiles et pour guider laconception physique des bases de données et des entrepôts de données distribuées. Pour effectuer des analyses sur les données entreposées, nous utilisons généralement des requêtes OLAP. Une requête OLAP est une requête complexe contenant plusieurs opérations coûteuses, telles que la jointure en étoile, la projection, le filtrage et les opérations d’agrégats. Dans cette thèse, nous proposons différentes approches statiques et dynamiques de partitionnement et d’équilibrage des charges des données sur un cluster Hadoop, afin d’améliorer les performances des entrepôts de données distribuées.Nous avons proposé différents schémas statiques et dynamiques d’un entrepôt de données volumineux distribué sur un cluster de noeuds homogènes ; ce qui peut aider le système distribué à améliorer le temps d’exécution des opérations d’une requête OLAP. Nous avons proposé quatre approches : la première est une nouvelle stratégie de placement de données, pour permettre à un système de traitement des requêtes d’exécuter la jointure en étoile en un seul cycle MapReduce, sans la phase de shuffle. Dans la deuxième contribution, nous proposons différentes techniques de partitionnement et de bucketing pour éviter le chargement inutile de certains blocs de données HDFS et pour améliorer le traitement parallèle, en utilisant un modèle piloté par une charge de requêtes. Dans la troisième approche, nous proposons une nouvelle conception physique d’un entrepôt de données volumineux distribué sur un cluster Hadoop, en combinant la première approche basée sur les données et la seconde solution qui repose sur une charge de requêtes. La quatrième contribution a été développée pour améliorer les fonctions de groupement (Group-By) et d’agrégation en utilisant une approche dynamique capable de définir à la volée le meilleur schéma de partitionnement des reducers. Pour évaluer nos approches, nous avons fait des expérimentations avec différentes tailles de clusters, en utilisant différents volumes d’entrepôts de données, et où la table des faits contient plus de 28 milliards d’enregistrements. Nous avons utilisé le benchmark TPCDS, la plate-forme Hadoop-YARN, le moteur d’exécution Spark, le système Ray et Hive. Les résultats expérimentaux obtenus montrent que nos méthodes sont plus performantes que les approches existantes sur plusieurs aspects, notamment en terme du temps d’exécution des requêtes OLAPPartitioning and distributing of the data have been widely used in sharing nothing systems, more particularly in the distributed systems that used the MapReduce paradigm, such as Hadoop ecosystem and Spark. They have been used for many purposes, such as load balancing, skipping to load unnecessary data partitions and for guiding the physical design ofdistributed databases or data warehouses. To do analysis with data warehouses, usually, we used OLAP queries. An OLAP query is a complex query that contains several cost operations, such as the star join, the projection, filtering, and aggregate functions. In this thesis, we propose different static and dynamic approaches of partitioning and load balancing of the data, to improve the performances of distributed big data warehouses over Hadoop cluster. We have proposed different static and dynamic schemes of a big data warehouse over a cluster of homogeneous nodes, which can help the distributed system to enhance the executing time of OLAP query operations, such as star join operation, scanning tables, and Group-By operation.We have proposed four approaches: The first approach, is a new data placement strategy which able to help a query processing system to perform a star join operation in only one MapReduce cycle, without a shuffle phase; In the second contribution, we propose different partitioning and bucketing techniques to skip loading some HDFS blocks and to enhance the parallel treatment of the distributed system, based on a workload-driven model; In the third approach, we propose a novel physical design of distributed big data warehouse over Hadoop cluster, such as we combine between our first data-driven approach and the second workloaddriven solution; The fourth contribution has been developed to improve Group-by and aggregate functions, by using a dynamic method, which able to define on the fly the best partitioning scheme of the reducer inputs. To evaluate our approaches, we have conducted some experiments on different cluster sizes, using different data warehouses volumes where the fact table has more than 28 billions of records. We have used the TPC-DS benchmark, a Hadoop-YARN platform, a Spark engine, and Ray and Hive system. Our experiments show that our methods outperform the state-of-the-art approaches in many aspects, especially on the OLAP query execution time
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Alsalamat, Hassan. "Verfahren zur Ermittlung des Einflusses von infrastrukturellen und betrieblichen Faktoren auf die spezifischen Kosten der Eisenbahninfrastruktur." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-94912.
Full textAbstract:
Die Arbeit ist ein Beitrag zur betrieblich-ökonomischen Optimierung der Eisenbahninfrastruktur auf der Grundlage ihres Kosten-Nutzen-Verhältnisses. Der wesentliche Inhalt der Arbeit ist die Erarbeitung einer Methodik, mit deren Hilfe die Kosten einer Eisenbahnstrecke je fahrbarer Zugtrasse, basierend auf Streckenstandards, der Deutsche Bahn AG, berechnet werden können.
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Karlsson, Maria. "Ubåtar på djupdyk i svensk media : En kvalitativ textanalys av framställningen av ubåtskränkningen i Stockholms skärgård år 2014 i svensk media." Thesis, Linnéuniversitetet, Institutionen för statsvetenskap (ST), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-44634.
Full textAbstract:
The 17th October 2014 the Swedish Armed Forces (SwAF) introduced an intelligence operation in Stockholm archipelago after receiving credible observations regarding illegal underwater activities. Following the data collection and associated analysis it could be stated with certainty that a foreign submarine had violated the Swedish territorial waters. Media depend on SwAF to provide them with accurate information due to the confidentiality in these matters and the general area of investigation is therefore how the actions of the Swedish Armed Forces, in the submarine incident 2014, were portrayed in the Swedish media. Newspapers and blogs of defense policy represent the media and the thesis is based on the theories constructed by Graham Allison, the rational actor, organizational behavior and governmental politics. Furthermore, it is relevant to examine if there are any similarities or differences in how the submarine incident is illustrated, and what may be the reason for any possible occurrences. The conclusion shows that the same tendency of frequent used theories occur equivalent throughout the media where the rational actor was highlighted, and few attempts were made to include governmental politics. The newspapers adopt a descriptive character whereas the blogs mainly focus on discussions regarding operational improvements, which probably vary due to the different types of platforms and their time-dependent interest in the matter.
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Karlsson, Maria. "Ubåtar på djupdyk i svensk media : En kvalitativ textanalys av framställningen av ubåtskränkningen i Stockholms skärgård år 2014 i svensk media." Thesis, Linnéuniversitetet, Institutionen för statsvetenskap (ST), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-43744.
Full textAbstract:
The 17th October 2014 the Swedish Armed Forces (SwAF) introduced an intelligence operation in Stockholm archipelago after receiving credible observations regarding illegal underwater activities. Following the data collection and associated analysis it could be stated with certainty that a foreign submarine had violated the Swedish territorial waters. Media depend on SwAF to provide them with accurate information due to the confidentiality in these matters and the general area of investigation is therefore how the actions of the Swedish Armed Forces, in the submarine incident 2014, were portrayed in the Swedish media. Newspapers and blogs of defense policy represent the media and the thesis is based on the theories constructed by Graham Allison, the rational actor, organizational behavior and governmental politics. Furthermore, it is relevant to examine if there are any similarities or differences in how the submarine incident is illustrated, and what may be the reason for any possible occurrences. The conclusion shows that the same tendency of frequent used theories occur equivalent throughout the media where the rational actor was highlighted, and few attempts were made to include governmental politics. The newspapers adopt a descriptive character whereas the blogs mainly focus on discussions regarding operational improvements, which probably vary due to the different types of platforms and their time-dependent interest in the matter.
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Čech, Ondřej. "Vliv namáhání alkalických akumulátorů na jejich parametry." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217856.
Full textAbstract:
This master's thesis deals with alkaline battery characteristics and it has special consideration of nickel-cadmium cells. There are three main experimental parts in this paper. First one is concerned with positive electrode materials properties and is aimed to investigate impact of magnesium ions formed into nickel hydroxide electrode structure. Second part deals with battery charging/discharging and response measurement tool design. National Instruments hardware PXI modules for data acquisition was used and program in LabView environment was made. Last one is concerned with nickel-cadmium cell properties changes during increased temperature stressing. Investigation of cell self-charge changes during lithium hydroxide addition into electrolyte was made.
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Al-Hasani, Firas Ali Jawad. "Multiple Constant Multiplication Optimization Using Common Subexpression Elimination and Redundant Numbers." Thesis, University of Canterbury. Electrical and Computer Engineering, 2014. http://hdl.handle.net/10092/9054.
Full textAbstract:
The multiple constant multiplication (MCM) operation is a fundamental operation in digital signal processing (DSP) and digital image processing (DIP). Examples of the MCM are in finite impulse response (FIR) and infinite impulse response (IIR) filters, matrix multiplication, and transforms.
The aim of this work is minimizing the complexity of the MCM operation using common subexpression elimination (CSE) technique and redundant number representations. The CSE technique searches and eliminates common digit patterns (subexpressions) among MCM coefficients. More common subexpressions can be found by representing the MCM coefficients using redundant number representations.
A CSE algorithm is proposed that works on a type of redundant numbers called the zero-dominant set (ZDS). The ZDS is an extension over the representations of minimum number of non-zero digits called minimum Hamming weight (MHW). Using the ZDS improves CSE algorithms' performance as compared with using the MHW representations. The disadvantage of using the ZDS is it increases the possibility of overlapping patterns (digit collisions). In this case, one or more digits are shared between a number of patterns. Eliminating a pattern results in losing other patterns because of eliminating the common digits. A pattern preservation algorithm (PPA) is developed to resolve the overlapping patterns in the representations.
A tree and graph encoders are proposed to generate a larger space of number representations. The algorithms generate redundant representations of a value for a given digit set, radix, and wordlength. The tree encoder is modified to search for common subexpressions simultaneously with generating of the representation tree. A complexity measure is proposed to compare between the subexpressions at each node. The algorithm terminates generating the rest of the representation tree when it finds subexpressions with maximum sharing. This reduces the search space while minimizes the hardware complexity.
A combinatoric model of the MCM problem is proposed in this work. The model is obtained by enumerating all the possible solutions of the MCM that resemble a graph called the demand graph. Arc routing on this graph gives the solutions of the MCM problem. A similar arc routing is found in the capacitated arc routing such as the winter salting problem. Ant colony optimization (ACO) meta-heuristics is proposed to traverse the demand graph. The ACO is simulated on a PC using Python programming language. This is to verify the model correctness and the work of the ACO. A parallel simulation of the ACO is carried out on a multi-core super computer using C++ boost graph library.
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Tsou, Ni-Tsai, and 鄒妮采. "A Research for Operational Performance of Quantizing Blocks Deployment and Yard Equipment Allocation in the Container Terminal." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/2t396w.
Full textAbstract:
碩士國立臺灣海洋大學
商船學系
102
Container port is not only the gate of sea transportation services, but also affects ship companies’ route planning with its overall operational performance. For ship companies, operational performance of container terminals which use handling efficiency as the assessing criteria, and has the close relationships with the quay’s support. In this research, we took linear berth as the research object. The first main topic discussed about different deployment of container terminal whether it will affect operational performance or not. We designed four plans and analysis them with three variables, that is berth’s loading/unloading machines, the yard’s loading/unlading machines, and the block’s arrangement. Then assessed them in five criteria: operational performance of yard, operational performance of blocks, operational performance of blocks’ machines, operational performance of berth, and operational performance of gantry cranes. We use Flexsim CT, the simulation system of container terminal, as the experiment method. The results showed that if there is no transfer-area, the average dwelling time of RTG would be reduced; however the average dwelling time of containers would become longer. If there are transfer-areas beside blocks, they could reduce the average dwelling time of yard. Moreover, if we arrange the transfer-areas beside blocks in one side, it could optimize the operational performance of gantry cranes; on the other hand, if we arrange the transfer-areas beside blocks in the both sides, it could minimize the dwelling time of containers in the blocks, which handle loading and unloading containers in the same time. The second main topic discussed about different deployment of container terminal whether it will affect operational performance or not. We designed six plans and analysis them with four variables, that is block arrangement, trucks’ path, and the yard’s loading/unlading machines’ type and quantities. Then assessed them in two criteria: operational performance of berth, and operational performance of gantry cranes. The results showed that the more dispersal block arrangement with shorter truck working path would let truck move faster between berth and yard, in which decrease gantry cranes’ waiting time and ship’s staying time, which promotes the operational performance.
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Calhoun, Michael. "Characterization of block memory operations." Thesis, 2006. http://hdl.handle.net/1911/17865.
Full textAbstract:
Block memory operations are frequently performed by the operating system and consume an increasing fraction of kernel execution time. These operations include memory copies, page zeroing, interprocess communication, and networking. This thesis demonstrates that performance of these common OS operations is highly dependent on the cache state and future use pattern of the data. This thesis argues that prediction of both initial cache state and data reuse patterns can be used to dynamically select the optimal algorithm. It describes an innovative method for predicting the state of the cache by using a single cache-line probe. The performance of networking, which is dominated by kernel copies, is improved by the addition of dedicated hardware in the network interface. Finally, based upon the behavior of block memory operations, this thesis proposes improvements such as a hardware cache probe instruction, a dedicated memory controller copy engine, and centralized handling of block memory operations to improve performance in future systems.
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Huang, Li-Jung, and 黃麗蓉. "Do Operational and Financial Risks affect the Block Ownership of Spin-offs?" Thesis, 2013. http://ndltd.ncl.edu.tw/handle/45499635582823696436.
Full textAbstract:
碩士國立交通大學
財務金融研究所
101
A spin-off occurs when a company takes a division or part of its business and creates an entirely new entity. Spin-offs usually inherit the ownership structure of their parents and are likely to experience significant changes in the beginning of the spin-offs' independent existence. Specifically, the change from the monitoring requirements constitutes a shock to this inherited ownership structure. This paper examines how short-term solvency affects the short-term financial risk of spin-offs and how the ownership structures change in response to changes in monitoring needs arising from differences between parent companies and spinoffs. On average, block ownership increases from an inherited level of 39.04% to 45.17% in three years. The results suggest that block ownership changes in response to the monitoring needs of spin-offs; in addition to the operational risk, the changes of monitoring needs are also subject to short-term financial risks.
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Hong, Chong-Jyun, and 洪崇駿. "Study on the Mixed Loading/Unloading Operation of Containers—Integrated Block Deployment and Block Equipment." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wncqmb.
Full textAbstract:
碩士國立臺灣海洋大學
商船學系
107
Taiwan is a country surrounded by the sea. The transportation of a large number of goods is mainly based on shipping. Therefore, the efficiency and operation of the port are very important factors affecting national economy. This study constructs a model based on the port simulation system, and the plans is divided into two themes, a total of ten plans. Theme 1、Different operation mode and block configuration: Discuss the difference between single operation and mixed operation, and whether the complexity of the block affects the performance of the operation. The single operation that unload the imported containers on the ship before operating the export containers. The mixed operation is the simultaneous operation of the import containers and the export containers. Theme 2、Block configuration and block equipment Under the mixed operation mode, and discuss the effects of different block working equipment and internal configuration of the block on the performance of operations. Three different types of block working equipment are assigned, including rubber tired gantry crane, rail mounted gantry crane and duel rail mounted gantry crane. The internal configuration of the block is divided into two cells, four cells and six cells. In this study, we designed and analyzed plans by FlexSim CT port simulation system and picked index from the berth performance and block performance to evaluate the plan. With the importance of the evaluation criteria from the expert questionnaire, we used SMARTER analysis and generalized concordance analysis to sort the plans to make the research better and complete. The research results show that under the same basic conditions, mixed operation with single container type block is the most efficient solution. The low container complexity of the block and the bridge crane can reduce the time by mixed operation; the block equipment is the best choice for the rubber tired gantry crane with the six-cell configuration inside the block which can make full use of each block and easier to manage containers. To achieve the purpose of shortening the berth time of the ship, and improve the operation performance of container terminal.
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Syu, Yu-Tzu, and 許育慈. "A Study of Berth Cranes Operation and Yard Blocks Assignment in the Container Port." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/62amfw.
Full textAbstract:
碩士國立臺灣海洋大學
商船學系
102
Using the twelve kinds of container block configuration of the operating analysis, this study evaluates the combination allocation of container yard at the convex embankment-type container terminal, mainly vertical to the main routes boat seats disposed container block, Design principles in three ways: 1. On the same basis, using the four kinds of container block configuration of the operating at the same block. Under the same conditions, such as the same time the ship arrives, the number of equipment uploaded/loaded at block, and the number of container capacity and container block capacity. 2. The design principle to using the four kinds of container block configuration of the operating the same container vessels of the same block and to be placed adjacent berthing berth container block. 3. The design principle to the berth crane unloading ways and each cargo (Hatch) of containers are stacked in the storage area of the same combination. The analyses, combined with Flexsim CT system simulation method, are to discuss the sort of four scenarios. Two indicators are assessed: berth operating efficiency, berth-crane efficiency. The results show, when the bridge cranes for loading and unloading at the same hatch and when loading or unloading a container, stacking at the same block will be better than different block,. In addition, the vertical to the main routes boat seats disposed container block is optimum. Therefore, the main key factor that improves the operational performance of container port is domain by the blocks’ assignment and berth cranes’ assignment.
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Rubio, Enrique. "Long term planning of block caving operations using mathematical programming tools." Thesis, 2002. http://hdl.handle.net/2429/13426.
Full textAbstract:
In the past very rudimentary methods have been used to plan and schedule the extraction of
ore from block cave operations. The basic assumption of these methods has been that the
movement of ore through the draw points is smooth and can be done in a specified sequence.
There are many operational research tools available to allocate resources and schedule
operations in an optimum way. Many of these were developed specifically for the
manufacturing and service industry. Although some optimization and scheduling tools have
been used in open pit mines, few have been applied in underground mining.
The principle of scheduling systems reviewed in this research is the link between strategic
goals and production scheduling. Two strategic goals in particular have been formulated in
this research the maximization of NPV and the optimization of the mine life in block caving.
Both of these goals have required the integration of geomechanical aspects of the ore
extraction, resource management, mining system and metallurgical parameters involved in
the mineral extraction.
One of the main results obtained in this thesis is the integration of mine reserves estimation
and development rate as a result of the production scheduling. Traditionally these parameters
have been computed independent of the production scheduling. The second contribution
made by this research was the formulation of link between the draw control factor and the
angle of draw. This relation was built in to the actual draw function to compute schedules
with high performance in draw control. Case studies have been used as an example of the
application of an operational research approach to scheduling in a block caving operation.
Future research has also been outlined to approach the problem of linking the short and the
long term planning, which has been resolved using mathematical programming tools. It is
proposed to integrate the actual reconciliation process into the scheduling so operational
information can be used to reproduce variability of the current long term planning models.
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Le, Roux Petrus Jacobus. "The extraction of existing remnant blocks of ground at Harmony Gold Mine's Free State operations." Thesis, 2009. http://hdl.handle.net/10539/6497.
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Wang, Chi-Hsu. "On the characterization of generalized block-pulse operational matrices and their applications in control systems." 1986. http://catalog.hathitrust.org/api/volumes/oclc/13617215.html.
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Assibey-Bonsu, Winfred. "New models for borehole valuation of new mining operations and routine valuation of ore reserve blocks." Thesis, 2016. http://hdl.handle.net/10539/21335.
Full textAbstract:
This thesis proposes some new valuation models and procedures for
global and local ore reserve estimation.
To obtain efficient grade and tonnage estimates for global borehole
valuations of new gold mining properties, the appropriate spatial and
distributional models for the mineralisation are absolutely essential. [Abbreviated Abstract. Open document to view full version]GR 2016
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Lee, Wei-Cheng, and 李偉成. "The remedial instruction by block representation on four arithmetic operations of integers." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/62816951116632425563.
Full textAbstract:
碩士國立臺南大學
應用數學系數學教材研發產業碩士專班
102
The purpose of this research is to observe the fourth grader’s performance of problem-solving on four integer arithmetic operations and use pictures comblined with them to improve the students’ learning performance.This research takes three students in fourth grade in one elementary school as subjects in Tainan city. This research involes qualitative analysis. the research instrument is visual thinking made by myself. During the period of this research. I collected the data by worksheets,student interviews ,and so on. I also re-record and analyze the data to explore student performance for problem-solving on four arithmetic operations of integer. Here are the results of this research: 1.Regarding the problem-solving performance: (1) Significant progress in student’s achievement. (2) Underachieve students need their teacher to read the questions. (3) After remedial instruction. Students obviously willing to learn. 2.About the types of mistakes and misconceptions: (1) Some students need to improvements in their vocabulary and the corresponding mathematical concepts. (2) Students cant’s understand when the subject is difficult to do. (3) Unclear rules lead to errors.
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Chiu, Wen Chung, and 丘文中. "Use Software Define Network Integration Security Operations Center Automation Block Cyber Attack." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/70729480293169873128.
Full textAbstract:
碩士淡江大學
資訊管理學系碩士在職專班
104
Traditional designed network architectures are hardly effectively prevent network security from hackers increasingly sophisticated attacks. To improve the traditional network architecture for better preventation, we try to replace the traditional firewall device to software-defined network (SDN) environment by integrated using of switches and integrated information security monitoring center (SOC). The SOC collects various information from security devices, network device logs, database, operating system, applications, the intricacies of log files. From thousands of instant capture information security events connected state analysis comparison identify hazards in or organization of information security behavior shallow, and immediately stop the dangerous traffic, instant automated defense against them comes from external and internal attacks through integration. The experimental results also show that the paper proposed SDN (centralized device) combined (IT centralization) of the SOC concept works correctly, and effectively reduce the manual work required to adjust the security policy.
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許育彰. "VLSI Implementation and IP Design for Blowfish Block Cipher with Operation Mode." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/08633048765352405341.
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Vakilalroayaei, Hessam. "Dynamic Behaviour of Coke Drums PSVs During Blocked Outlet Condition." Thesis, 2009. http://hdl.handle.net/10012/4382.
Full textAbstract:
The maximum yield taken in an oil refinery can not exceed 70% without including Delayed Coker Unit (DCU) as part of unit operations in the refinery. This implies naturally a big attraction on investing of such a unit for refiners. However, during the past decades, there were few refiners included Coker unit in the refinery, due to the fact of its large capital investment with a high marginal profitability. On the other hand the technologies developed to operate a coker unit, involve a series of process steps that require highly trained and well experienced operators with a state of art of design to overcome all the challenges with this unit operation. Safety, as a prime factor of design and operation requires much attention in the design of this unit.
Among different safety consideration in the design and operation of Coker Unit, this project thesis focuses on the dynamic behaviour of Coke Drums PSV (Process Safety Valve) relief and its interaction with Blowdown section of the unit that leads also to the PSV relief of Blowdown section with change of temperature versus time during the first 15 minutes that is considered as the time required for operators intervention.
The main findings in this thesis are about the complications in the design aspects of delayed coker unit as well as the importance and role of safety of operation of this unit. It also gave me an insight of cascade relief during the upset condition in an online coke drum and the importance of a reliable piping system to handle the hydraulics as well high temperature conditions.