Дисертації з теми "High-performance transmission"
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Adama, A. "High performance data transmission filters." Thesis, University of Essex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371923.
Повний текст джерелаAlavi, Hessam. "Acoustics of high performance transmission-line loudspeakers." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/388041/.
Повний текст джерелаClément, Bertier. "Linux Kernel Packet Transmission Performance in High-speed Networks." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191435.
Повний текст джерелаLinux Kernel protokollstacken blir fler och fler tillägg som tiden går. Som ny teknik uppstår, fler funktioner har genomförts och kan leda till en viss mängd svälla. Men nya metoder har lagts till kärnan för att kringgå vanliga genomströmning problem och att maximera den totala föreställningar, med tanke på vissa omständigheter. Att fastställa förmågan hos kärnan för att producera paket med en given hastighet, kommer vi att använda pktgen verktyget. Pktgen är en laddbar kärnmodul tillägnad trafik generation baserad på UDP. Dess filosofi var att vara i en låg position i kärnan protokollstacken för att minimera mängden av overhead orsakad av vanliga API:er. Som mätningarna görs vanligtvis i paket per sekund i stället för bandbredd, gör UDP-protokollet vettigt att minimera mängden tid på att skapa ett paket. Det har flera alternativ som kommer att undersökas, och för ytterligare insikter sin sändningsalgoritmen kommer att analyseras. Men en programvara är inte bara en kompilerad bit kod, är det en uppsättning instruktioner sprang ovanpå hårdvara. Och den här maskinvaran kan eller inte kan följa med utformningen av en programvara, vilket gör utförandet långsammare än väntat eller i extrema fall även fungerar inte. Denna avhandling syftar till att undersöka de maximala kapacitet Linux paketsändningar i höghastighetsnät, t.ex. 10 gigabit eller 40 Gigabit. För att gå djupare in i förståelsen av kärnan beteende under överföringen kommer vi att använda profilverktyg, som perf och det nyligen antagna ramen eBPF.
Patel, Hitesh Narhari 1970. "Self adjusting transmission line drivers for high performance systems." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278274.
Повний текст джерелаZhang, Jie. "Performance of high speed networks during bulk data transfer." Thesis, University of Kent, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294055.
Повний текст джерелаKiani, Mehdi. "Wireless power and data transmission to high-performance implantable medical devices." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53396.
Повний текст джерелаOlsson, Håkan. "Performance analysis of a low-speed high-torque hydrostatic transmission unit." Licentiate thesis, Luleå tekniska universitet, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16922.
Повний текст джерелаGodkänd; 2003; 20070217 (ysko)
Mirbozorgi, Seyed Abdollah. "High-performance wireless power and data transfer interface for implantable medical devices." Doctoral thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26209.
Повний текст джерелаIn recent years, there has been major progress on implantable biomedical systems that support most of the functionalities of wireless implantable devices. Nevertheless, these devices remain mostly restricted to be commercialized, in part due to weakness of a straightforward design to support the required functionalities, limitation on miniaturization, and lack of a reliable low-power high data rate interface between implants and external devices. This research provides novel strategies on the design of implantable biomedical devices that addresses these limitations by presenting analysis and techniques for wireless power transfer and efficient data transfer. The first part of this research includes our proposed novel resonance-based multicoil inductive power link structure with uniform power distribution to wirelessly power up smart animal research systems and implanted medical devices with high power efficiency and free positioning capability. The proposed structure consists of a multicoil resonance inductive link, which primary resonator array is made of several identical resonators enclosed in a scalable array of overlapping square coils that are connected in parallel and arranged in power surface (2D) and power chamber (3D) configurations. The proposed chamber uses two arrays of primary resonators, facing each other, and connected in parallel to achieve uniform power distribution in 3D. Each surface includes 9 overlapped coils connected in parallel and implemented into two layers of FR4 printed circuit board. The chamber features a natural power localization mechanism, which simplifies its implementation and eases its operation by avoiding the need for active detection of the load location and power control mechanisms. A single power surface based on the proposed approach can provide a power transfer efficiency (PTE) of 69% and a power delivered to the load (PDL) of 120 mW, for a separation distance of 4 cm, whereas the complete chamber prototype provides a uniform PTE of 59% and a PDL of 100 mW in 3D, everywhere inside the chamber with a chamber size of 27×27×16 cm3. The second part of this research includes our proposed novel, fully-integrated, low-power fullduplex transceiver (FDT) to support bi-directional neural interfacing applications (stimulating and recording) with asymmetric data rates: higher rates are required for recording (uplink signals) than stimulation (downlink signals). The transmitter (TX) and receiver (RX) share a single antenna to reduce implant size. The TX uses impulse radio ultra-wide band (IR-UWB) based on an edge combining approach, and the RX uses a novel 2.4-GHz on-off keying (OOK) receiver. Proper isolation (> 20 dB) between the TX and RX path is implemented 1) by shaping the transmitted pulses to fall within the unregulated UWB spectrum (3.1-7 GHz), and 2) by space-efficient filtering (avoiding a circulator or diplexer) of the downlink OOK spectrum in the RX low-noise amplifier (LNA). The UWB 3.1-7 GHz transmitter using OOK and binary phase shift keying (BPSK) modulations at only 10.8 pJ/bit. The proposed FDT provides dual band 500 Mbps TX uplink data rate and 100 Mbps RX downlink data rate. It is fully integrated on standard TSMC 0.18 nm CMOS within a total size of 0.8 mm2. The total power consumption measured 10.4 mW (5 mW for RX and 5.4 mW for TX at the rate of 500 Mbps).
Wu, Shaoen Biaz Saad. "High performance rate adaptation on IEEE 802.11 networks." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Computer_Science_and_Software_Engineering/Dissertation/Wu_Shaoen_34.pdf.
Повний текст джерелаMhamdi, Lotfi. "High-performance scheduling algorithms for buffered crossbar switches /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?COMP%202002%20MHAMDI.
Повний текст джерелаIncludes bibliographical references (leaves 116-123). Also available in electronic version. Access restricted to campus users.
Alade, Temitope. "Performance evaluation of in-building DAS for high data rate wireless transmission." Thesis, University of Kent, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.590073.
Повний текст джерелаBahrami, Hadi. "High-performance wireless interface for implant-to-air communications." Doctoral thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26142.
Повний текст джерелаWe are working on a fully wireless brain-machine-interface to provide a communication link between the brain and external devices, enabling recording and stimulating the brain for permanent usage. In this thesis we explore channel modeling, implanted and wearable antennas as suitable propagators for this application, system level design of an implantable UWB transceiver, and circuit level design and implementing it by TSMC 0.18 um CMOS process. Also, in a collaboration project with McGill University, we designed a flexible sixteen antenna array for microwave breast cancer detection. Our first contribution calculates channel characteristics of implant-to-air UWB wireless link, average specific absorption rate (ASAR), and FCC guidelines on transmitted UWB power spectral density. Knowledge of channel behavior is required to determine the maximum allowable power to 1) respect ANSI guidelines for avoiding tissue damage and 2) respect FCC guidelines on unlicensed transmissions. We utilize a realistic model of the biological channel to inform the design of antennas for the implanted transmitter and the external receiver. Antennas placement is examined under two scenarios having contrasting power constraints. Performance of the system within the biological tissues is examined via simulations and experiments. Our second contribution deals with designing single and dual-polarization antennas for wireless ultra-wideband neural recording systems using an inhomogeneous multi-layer model of the human head. Antennas made from flexible materials are more easily adapted to implantation; we investigate both flexible and rigid materials and examine performance trade-offs. The proposed antennas are designed to operate in a frequency range of 2–11 GHz (having S11 below -10 dB) covering both the 2.45 GHz (ISM) band and the 3.1–10.6 GHz UWB band. Measurements confirm simulation results showing flexible antennas have little performance degradation due to bending effects (in terms of impedance matching). Finally, a comparison is made of four implantable antennas covering the 2-11 GHz range: 1) rigid, single polarization, 2) rigid, dual polarization, 3) flexible, single polarization and 4) flexible, dual polarization. In all cases a rigid antenna is used outside the body, with an appropriate polarization. Several advantages were confirmed for dual polarization antennas: 1) smaller size, 2) lower sensitivity to angular misalignments, and 3) higher fidelity. Our third contribution provides system level design of wireless communication architecture for implanted systems that simultaneously stimulate neurons and record neural responses. This architecture supports large numbers of electrodes (> 500), providing 100 Mb/s for the downlink of stimulation signals, and Gb/s for the uplink neural recordings. We propose a transceiver architecture that shares one ultra-wideband antenna, a streamlined transceiver working at full-duplex on both bands, and a novel pulse shaper for the Gb/s uplink supporting several modulation formats. We present an ex-vivo experimental demonstration of the architecture using discrete components achieving Gb/s uplink rates. Good bit error rate performance over a biological channel at 0.5, 1, and 2 Gbps data rates for uplink telemetry (UWB) and 100 Mbps for downlink telemetry (2.45 GHz band) is achieved. Our fourth contribution presents circuit level design of the novel full-duplex transceiver (FDT) which is presented in our third contribution. This full-duplex transceiver supports high-density and multimodal neural interfacing applications (high-channel count stimulating and recording) with asymmetric data rates. The transmitter (TX) and receiver (RX) share a single antenna to reduce implant size. The TX uses impulse radio ultra-wide band (IR-UWB) based on an edge combining approach, and the RX uses a novel 2.4-GHz on-off keying (OOK) receiver. Proper isolation (> 20 dB) between the TX and RX path is implemented 1) by shaping the transmitted pulses to fall within the unregulated UWB spectrum (3.1-7 GHz), and 2) by spaceefficient filtering (avoiding a circulator or diplexer) of the downlink OOK spectrum in the RX low-noise amplifier. The UWB 3.1-7 GHz transmitter can use either OOK or binary phase shift keying (BPSK) modulation schemes. The proposed FDT provides dual band 500-Mbps TX uplink data rate and 100 Mbps RX downlink data rate, and it is fully integrated into standard TSMC 0.18 um CMOS within a total size of 0.8 mm2. The total measured power consumption is 10.4 mW in full duplex mode (5 mW at 100 Mbps for RX, and 5.4 mW at 500 Mbps or 10.8 pJ/bit for TX). Our fifth contribution is a collaboration project with McGill University which we design single and dual-polarization antennas for wireless ultra-wideband breast cancer detection systems using an inhomogeneous multi-layer model of the human breast. Antennas made from flexible materials are more easily adapted to wearable applications. Miniaturized flexible monopole and spiral antennas on a 50 um Kapton polyimide are designed, using a high frequency structure simulator (HFSS), to be in contact with biological breast tissues. The proposed antennas are designed to operate in a frequency range of 2–4 GHz (with reflection coefficient (S11) below -10 dB). Measurements show that the flexible antennas have good impedance matching while in different positions with different curvature around the breast. Furthermore, two flexible conformal 4×4 ultra-wideband antenna arrays (single and dual polarization), in a format similar to that of a bra, were developed for a radar-based breast cancer detection system.
Al-Asadi, Mohammed Mahdi Mohammed. "High frequency performance of structured wire cabling in communication systems." Thesis, De Montfort University, 2000. http://hdl.handle.net/2086/10733.
Повний текст джерелаTandon, Prateek. "High-performance advanced encryption standard (AES) security co-processor design." Thesis, Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180433/unrestricted/tandon%5fprateek%5f200312%5fms.pdf.
Повний текст джерелаLima, Pilla Laércio. "Topology-aware load balancing for performance portability over parallel high performance systems." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENM028.
Повний текст джерелаThis thesis presents our research to provide performance portability and scalability to complex scientific applications running over hierarchical multicore parallel platforms. Performance portability is said to be attained when a low core idleness is achieved while mapping a given application to different platforms, and can be affected by performance problems such as load imbalance and costly communications, and overheads coming from the task mapping algorithm. Load imbalance is a result of irregular and dynamic load behaviors, where the amount of work to be processed varies depending on the task and the step of the simulation. Meanwhile, costly communications are caused by a task distribution that does not take into account the different communication times present in a hierarchical platform. This includes nonuniform and asymmetric communication costs at memory and network levels. Lastly, task mapping overheads come from the execution time of the task mapping algorithm trying to mitigate load imbalance and costly communications, and from the migration of tasks.Our approach to achieve the goal of performance portability is based on the hypothesis that precise machine topology information can help task mapping algorithms in their decisions. In this context, we proposed a generic machine topology model of parallel platforms composed of one or more multicore compute nodes. It includes profiled latencies and bandwidths at memory and network levels, and highlights asymmetries and nonuniformity at both levels. This information is employed by our three proposed topology-aware load balancing algorithms, named NucoLB, HwTopoLB, and HierarchicalLB. Besides topology information, these algorithms also employ application information gathered during runtime. NucoLB focuses on the nonuniform aspects of parallel platforms, while HwTopoLB considers the whole hierarchy in its decisions, and HierarchicalLB combines these algorithms hierarchically to reduce its task mapping overhead. These algorithms seek to mitigate load imbalance and costly communications while averting task migration overheads.Experimental results with the proposed load balancers over different platform composed of one or more multicore compute nodes showed performance improvements over state of the art load balancing algorithms: NucoLB presented improvements of up to 19% on one compute node; HwTopoLB experienced performance improvements of 19% on average; and HierarchicalLB outperformed HwTopoLB by 22% on average on parallel platforms with ten or more compute nodes. These results were achieved by equalizing work among the available resources, reducing the communication costs experienced by applications, and by keeping load balancing overheads low. In this sense, our load balancing algorithms provide performance portability to scientific applications while being independent from application and system architecture
Yu, Sam Shaokai. "Performance analysis and call control procedures in high-speed multimedia personal wireless communications /." Title page, abstract and contents only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phy936.pdf.
Повний текст джерелаKaiser, Wilfried [Verfasser]. "Impact of advanced modulation formats on the system performance of high-speed optical transmission systems / Wilfried Kaiser." Aachen : Shaker, 2003. http://d-nb.info/1181600766/34.
Повний текст джерелаMukherjee, Tonmoy Shankar. "High performance, low-power and robust multi-gigabit wire-line design." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/39515.
Повний текст джерелаChen, Xiaomin [Verfasser], and Ashwin [Akademischer Betreuer] Gumaste. "Performance Analysis of Parallel Transmission and Multipath Routing in High-Speed Network Systems / Xiaomin Chen ; Betreuer: Ashwin Gumaste." Braunschweig : Technische Universität Braunschweig, 2014. http://d-nb.info/117582075X/34.
Повний текст джерелаRobinson, Jonathan. "Efficiency and performance analysis of AC and DC grid based wind farms connected to a high voltage DC transmission line." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86959.
Повний текст джерелаUn réseau trans-canadien peut aider à intégrer l'énergie éolienne, qui s'étend sur une vaste zone géographique, en augmentant la capacité de transfert de puissance des lignes de transport et en réduisant les effets non-contrôlables des sources d'énergie renouvelable. L'utilisation de la technologie 'HVDC' peut réduire les coûts des longues lignes de transmission et aussi offrir d'autres avantages comme la réduction de l'empreinte géographique, une meilleure fiabilité, et la localisation des défauts. Toutefois, il n'y a pas de raccordements multi-terminaux HVDC en opération. Cette thèse propose deux méthodes de connexion d'un parc éolien à une ligne HVDC, utilisant des réseaux c.a. et c.c. Le rendement, les composantes requises et la performance transitoire des deux méthodes de connexion sont présentés. Une meilleure efficacité peut être obtenue avec le réseau c.a., mais en intégrant les éoliennes MT, l'efficacité du réseau c.c. est améliorée. Des études préliminaires démontrent que le réseau c.c. aide à une meilleure isolation d'un court-circuit dans le parc éolien qui pourrait se transmettre aux lignes HVDC. Les deux réseaux sont capables de réduire les effets d'un court-circuit, mais peuvent avoir des problèmes à demeurer en service sans déclenchement pour un défaut transitoire.
Hibino, Takashi, Mitsuru Sano, Masahiro Nagao, and Pilwon Heo. "A High-Performance Mo2C-ZrO2 Anode Catalyst for Intermediate-Temperature Fuel Cells." The Electrochemical Society, 2007. http://hdl.handle.net/2237/18429.
Повний текст джерелаCox, Ryan Yinghua. "Development of a Humidity-Resistant Coating to Impart High Oxygen Barrier Performance to Food Packaging Films." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1764.
Повний текст джерелаVosloo, Wallace L. (Wallace Lockwood). "A comparison of the performance of high-voltage insulator materials in a severely polluted coastal environment." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52625.
Повний текст джерелаENGLISH ABSTRACT: The main aim of this research programme was to compare the relative performance of different insulator materials used in South Africa when subjected to a severe marine pollution environment. A test programme and procedure, test facility and instrumentation were established. Some novel instrumentation and monitoring equipment were developed and built specifically for this research programme, supported by data analysing software programs. In order to compare material performance only, all non-material design variables between the test insulators had to be removed (e.g. creepage distance, connecting length, inter-shed spacing, profile, etc.). To achieve this some of the test insulators had to be specially manufactured. Leakage current, electrical discharge activity, climatic and environmental data was collected successfully over a one-year test period, starting with new test insulators. The peak and energy values of the leakage current were identified as the two main parameters needed to describe the leakage current activity on the test insulators. A correlation was found between the climatic and environmental data and the leakage current data, and it was found that the leakage current can be determined successfully from some of the climatic and environmental parameters monitored by using multiple regression techniques. Surface conductivity and energy were found to be the best parameters to show the maximum and continuous interaction of the insulator material surface with the electrolytic pollution layer. A natural ageing and pollution test procedure was developed, which has become a South African standard and is gaining international acceptance. A model and hypothesis are proposed to describe the electrical discharge activity that takes place on the test insulators and explain the difference in leakage current performance of the various materials. Keywords: Insulator, Pollution, High Voltage, Leakage current, Material performance.
AFRIKAANSE OPSOMMING: Die hoofdoel van hierdie navorsingsprogram was om die relatiewe prestasie van verskillende isolatormateriale wat in Suid-Afrika gebruik word te vergelyk in 'n swaar besoedelde marine omgewing. 'n Toetsprogram en prosedure, toets fasiliteit en instrumentasie is gevestig. 'n Paar nuwe instrumente en moniteer toerusting is ontwikkel en gebou spesifiek vir hierdie navorsingsprogram, gesteun deur data analise sagteware programme. Ten einde slegs materiaalprestasie te vergelyk, moes alle nie-materiaal ontwerpsveranderlikes tussen die toetsisolators verwyder word (bv. kruipafstand, konnekteer lengte, tussen-skerm spasiëring, profiel, ens.). Om dit reg te kry moes sommige van die toetsisolators spesiaal vervaardig word. Lekstroom, elektriese ontladingsaktiwiteit, klimaat en omgewingsdata is suksesvol versameloor 'n een-jaar toetsperiode, beginnende met nuwe toets isolators. Die piek en energie waardes van die lekstroom is identifiseer as die twee hoof parameters wat nodig is om die lekstroomaktiwiteit op die toetsisolators te beskryf. 'n Korrelasie is gevind tussen die klimaat- en omgewingsdata en die lekstroom data, en dit is gevind dat die lekstroom data suksesvol bepaal kan word van sekere van die klimaat- en omgewingsparameters wat gemoniteer is deur veelvoudige regressie tegnieke te gebruik. Oppervlakskonduktiwiteit en energie is gevind die beste parameters te wees om die maksimum en kontinue interaksie van die isolatormateriaaloppervlak met die elektrolitiese besoedelingslaag aan te toon. 'n Natuurlike veroudering en besoedeling toetsprosedure is ontwikkel, wat 'n Suid-Afrikaanse standaard geword het en besig is om internastionale aanvaarding te wen. 'n Model en hipotese word voorgestelom die elektriese ontladingsaktiwiteit wat op die toetsisolators plaasvind te beskryf en om die verskil in lekstroomprestasie van die verskeie materiale te verduidelik. S/eufelwoorde: Isolator, Besoedeling, Hoog Spanning, Leek stroom, Materiaal prestasie.
Säll, Erik. "Design of a Low Power, High Performance Track-and-Hold Circuit in a 0.18µm CMOS Technology." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1353.
Повний текст джерелаThis master thesis describes the design of a track-and-hold (T&H) circuit with 10bit resolution, 80MS/s and 30MHz bandwidth. It is designed in a 0.18µm CMOS process with a supply voltage of 1.8 Volt. The circuit is supposed to work together with a 10bit pipelined analog to digital converter.
A switched capacitor topology is used for the T&H circuit and the amplifier is a folded cascode OTA with regulated cascode. The switches used are of transmission gate type.
The thesis presents the design decisions, design phase and the theory needed to understand the design decisions and the considerations in the design phase.
The results are based on circuit level SPICE simulations in Cadence with foundry provided BSIM3 transistor models. They show that the circuit has 10bit resolution and 7.6mW power consumption, for the worst-case frequency of 30MHz. The requirements on the dynamic performance are all fulfilled, most of them with large margins.
Quaratino, Marco. "Virtual Calibration of CO2 and Pollutant Emissions of a High-Performance PHEV using Model-in-the-Loop Methodology." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/22053/.
Повний текст джерелаSathe, Nikhil. "Thermal modeling of many-core processors." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34834.
Повний текст джерелаHutzler, Andreas [Verfasser], Lothar [Akademischer Betreuer] Frey, and Lothar [Gutachter] Frey. "Development of advanced liquid cell architectures for high performance in situ transmission electron microscopy in materials sciences / Andreas Hutzler ; Gutachter: Lothar Frey ; Betreuer: Lothar Frey." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2018. http://d-nb.info/1175206377/34.
Повний текст джерелаPetrie, Christian Matthew. "Characterization of the Performance of Sapphire Optical Fiber in Intense Radiation Fields, when Subjected to Very High Temperatures." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405011475.
Повний текст джерелаRoberts, James N. "Etudes des performances de reseaux de telecommunications numeriques integrant des services a haut debit." Paris 6, 1987. http://www.theses.fr/1987PA066604.
Повний текст джерелаSánchez, Sánchez Almudena. "Modelling the evolution dynamics of the academic performance in high school in Spain. Probabilistic predictions of future trends and their economical consequences." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/32280.
Повний текст джерелаIn this dissertation, we use epidemiologic-mathematical techniques to model the academic performance in Spain (paying special attention on the academic underachievement) to understand better the mechanisms behind this important issue as well as to predict how academic results will evolve in the Spanish Bachillerato over the next few years. The Spanish Bachillerato educational level is made up of the last courses before accessing to the university or to the work market and corresponds to students of 16¿18 years old. This educational level is a milestone in the career training of students because it represents a period to make important decisions about academic and professional future. In a rst step, in the Chapter 2 we will present a deterministic model where academic performance is analyzed assuming the negative attitude of Bachillerato students may be due to their autonomous behavior and the in uence of classmates with bad academic results. Then, in the Chapter 3, the model is improved based on the idea that not only the bad academic habits are socially transmitted but also the good study habits. Besides, we decompose the transmission academic habits into good and bad academic habits, in order to analyze with more detail which group of students are more susceptible to be in uenced by good or bad academic students. The consideration of quantifying the abandon rates is also a new issue dealt with in it. The adopted approach allow to provide both punctual and con dence intervals predictions to the evolution of academic performance (including the abandon rates) in Bachillerato in Spain over the next few years. The adopted approach allows us to model academic performance in academic levels other than Bachillerato and/or beyond the Spanish academic system. This issue is assessed in Chapter 4, where the model is satisfactorily applied to the current academic system of the German region of North Rhine-Westphalia. To conclude this dissertation, we provide an estimation of the cost related to the Spanish academic underachievement based on our predictions. This estimation represents the investment in the Spanish Bachillerato from the Spanish Government and families over the next few years, paying special attention on the groups of students who do not promote and abandon during their corresponding academic year.
Sánchez Sánchez, A. (2013). Modelling the evolution dynamics of the academic performance in high school in Spain. Probabilistic predictions of future trends and their economical consequences [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/32280
TESIS
Alexandru, Mihai. "Efficient large electromagnetic simulation based on hybrid TLM and modal approach on grid computing and supercomputer." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2012. http://tel.archives-ouvertes.fr/tel-00797061.
Повний текст джерелаZhuang, Xiaotong. "Compiler Optimizations for Multithreaded Multicore Network Processors." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11566.
Повний текст джерелаTheiss, Frederick L. "Removal of iodine using LDH technology." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/100206/11/Frederick_Theiss_Thesis.pdf.
Повний текст джерелаCarvalho, João Pedro Martins de. "High Performance shallow packet inspection system for traffic identification." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/18455.
Повний текст джерелаThe evolution and growth of the Internet has led to a growing preoccupation regarding dynamic allocation of resources in large networks, as well as to an unprecedented growing adoption of security policies based on tra c classi cation. This phenomenon triggered the creation of deep inspection mechanisms for packets where we can see a cross-access that is based on the retrieval of speci c strings present in packet's Payload. This event raises a number of technical, ethical, and potentially legal limitations. With the increasing need to develop less invasive and more e cient inspection mechanisms, in terms of processing speed and potentially, memory management, the scienti c community began working in other types of approaches to solve the problem. In this dissertation, we propose a tra c ow classi cation system based on Shallow packet inspection. Given the latest forecasts and current statistical data, which estimates that about 90 % of all tra c will be video in the next few years, we have decided to devote special attention to this speci c type. For this, we proceeded to collect non-sensitive information, with which we perform a statistical study based on low-level statistics. The results obtained from this study were analysed from a behavioural point of view, in order to reach the extraction of coherent rules that allow the di erentiation of independent types of tra c. Finally, we studied, conceived and test an e cient ow organisation paradigm. The system has been tested and evaluated using packet ood tests. Following to the measurement and examination of results in terms of processing times as well as the use of main memory.
A evolução e crescimento da Internet tem levado a uma crescente preocupação tendo em vista a alocação dinâmica de recursos em redes de grande dimensão, assim como uma adopção sem precedente de politicas de segurança baseadas em classi ficação de tráfego. Este fenómeno desencadeou a criação de mecanismos de inspecção profunda de pacotes onde se assiste a um acesso transversal, que assenta na obtenção de sequências de bytes especificas, presentes no Payload de cada pacote, o que levanta uma série de limitações técnicas, éticas e potencialmente legais. Com a crescente necessidade de desenvolvimento de mecanismos de inspecção menos invasivos e mais e cientes em termos de velocidade e potencialmente gestão de memória, a comunidade cientifi ca começou a trabalhar em outros tipos de abordagem ao problema. Nesta dissertação, propomos um sistema de classi cação de fluxos de trafego que assenta em Shallow packet inspection. Tendo em conta as ultimas previsões e dados estatísticos atuais, que estimam que cerca de 90% de todo tráfego na Internet, seja do tipo vídeo nos próximos anos, decidimos dedicar especial atenção sobre esse tipo especifico. Para isso, procedemos a recolha de informação não sensível, com a qual efetuamos um estudo estatístico baseado em estatísticas de baixo nivel. Os resultados obtidos nesse estudo, foram analisados de um ponto de vista comportamental, por forma a alcançar uma prova de conceito na extracção de regras coerentes que permitam diferenciar tipos de tráfego independentes. Por fim, estudamos, concebemos e testamos um paradigma de organizaçao de fluxos de forma e ciente. O sistema foi testado e avaliado recorrendo a testes de inundação por pacotes, seguidos da medição e avaliação dos resultados em termos de tempo de processamento, assim como, ao uso de memoria principal.
Williams, Paul Timothy. "Acoustic performance of dissipative and hybrid silencers in ducts with large transverse dimensions." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/13745.
Повний текст джерелаRosim, Giovana de Cássia. "Análise da influência do ultra-som terapêutico na penetração transcutânea de diclofenaco sódico em humanos sadios." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/82/82131/tde-29082003-111047/.
Повний текст джерелаThe influence of therapeutic ultrasound on the transdermal transmission (sonophoresis) of sodium diclofenac as a gel of topic application (Voltaren Emulgel) was investigated in 14 human healthy volunteers (ten women, four men, 26,4 years of age, 62 Kg of body weight and 1,7 m of height on average). Therapeutic ultrasound (continuous mode, 1 MHz frequency, 0,5 W/square centimeter) was applied for 5 minutes on two 225 square centimeters (15 x 15 cm) areas on each side of the dorsum of the volunteers using ultrasound transmission gel as a coupling agent. Following ultrasonic irradiation, the gel was removed and gloves were used to apply 2,5 g on each two defined areas. The same volunteers participated in procedures twice at one-month interval on average, however the second time with the equipment turned off (sham procedure) for control. Blood samples (3 ml) were withdrawn from forearm veins, near the elbow flexure, immediately before and at 60, 120 and 180 minutes from the procedure, for analysis of the plasmatic diclofenac mass by means of high performance liquid chromatography (HPLC). The results showed that the plasmatic diclofenac mass was significantly higher (p=0,01) at 60 and 120 minutes following the ultrasound irradiation than the sham procedure. The results presented in this study support that therapeutic ultrasound applied prior to application of sodium diclofenac gel does lead to enhanced penetration of the drug across the skin under the conditions of the investigation
Jiménez, Macedo Víctor Daniel. "Contribución al modelado unidimensional en motores de dos tiempos de altas prestaciones." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/30773.
Повний текст джерелаJiménez Macedo, VD. (2013). Contribución al modelado unidimensional en motores de dos tiempos de altas prestaciones [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/30773
TESIS
Matshidza, Rhulani Daphney. "Improved transmission line protection performance concerning high resistance faults." Thesis, 2006. http://hdl.handle.net/10413/2211.
Повний текст джерелаThesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2006.
Zhou, Renbin. "High performance control of a transmission based servo actuator system." 2006. http://etd.utk.edu/2006/ZhouRenbin.pdf.
Повний текст джерелаCHANG, SHUN-FA, and 張順發. "Performance Analysis and Application of Wireless Ultra High Speed Transmission." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ps2863.
Повний текст джерела國立虎尾科技大學
電機工程系碩士班
106
This paper uses the manufacturer's WigGig to set seven speed modes to design a system that can automatically adjust the speed according to the distance. It is hoped that through this system, the WigGig speed can be automatically adjusted at different distances to achieve maximum transmission efficiency. We first gave a detailed introduction to the manufacturer's WigGig equipment specifications, including its features, applications, maximum ratings, recommended operating conditions, RF performance, antenna package specifications, and the use of internal APIs provided by the WigGig device. Then the paper introduces its software development environment and its system flow and program logic. For the speed mode 1~7, the actual file data is transmitted, and the file data transmitted to the receiving end is set to be transmitted without any error and correctly opened. And test the packet situation and speed situation, but the farther the distance, the automatic speed reduction interval, the signal can not be received, and the manufacturer's WigGig because of the directivity problem, the signal transmission process does not allow serious shadowing, We carry out the package test for different distances and interference with items. In this paper, we propose a system for designing a set of automatic speed adjustment function for different distances, so that it can be effectively transmitted at different distances. The experimental results show that at different distances, when the two ends cannot transmit at the current speed due to the long distance, they will self-reducing the speed and achieve a truly effective performance. In the data transmitted by the file, we will transfer the files in three different formats, images, compression, and pictures continuously, to know the correctness and stability of the data.
Cho, Hsiu-Ying, and 卓秀英. "High-Performance Slow-Wave Transmission lines and Improved De-embedding Techniques." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/56359136905052179804.
Повний текст джерела國立交通大學
電子研究所
98
The patterned ground shield (PGS) must be well designed; otherwise they may not at all able to improve the quality factor. Investigations into different strip length, strip spacing and metal layer positions of the slot-type floating shields for wavelength, attenuation loss, and characteristic impedance, which have not yet been conducted before, are performed in this work. In general, the assumption for lumped-equivalent-circuit-model-based techniques is valid only if the lengths of the DUT devices are much smaller than the distances between two ports. However, this is not always true for larger DUT devices and may result in over de-embedding when intrinsic device performance is involved. Therefore, the proposed de-embedding technique can address the problem of over de-embedding. The contribution of the interconnection and the via stack becomes important as the frequencies increase. Unfortunately, currently existing techniques do not account for via stack parasitic contributions. In this dissertation, high-performance transmission lines and improved de-embedding techniques are presented. The slow-wave concept has been used in order to design high-performance transmission lines and reduce the size of the transmission lines. Accurate models that describe the behavior of RF devices are critical for the circuit designs, and improved parasitic de-embedding techniques are proposed as to achieve accurate device characterization. A novel slow-wave transmission line with optimized slot-type floating shields in advanced CMOS technology is presented. Periodical slot-type floating shields are inserted beneath the transmission line to provide the substrate shield and shorten the electromagnetic propagation wavelength. This is the first study that demonstrates how the wavelength, attenuation loss, and characteristic impedance can be adjusted by changing the strip length, the strip spacing, and the metal layer positions of the slot-type floating shields. Wavelength shortening needs to be achieved with a trade-off between the slow-wave effect and the attenuation loss. The slot-type floating shields with different strip lengths, strip spacings and metal layer positions are analyzed. It is concluded that the minimum strip length provides the most optimal result. A design guideline can be established that enables circuit designers to achieve the most appropriate slot-type floating shields for optimal circuit performance. Transmission line test structures were fabricated by using 45 nm CMOS process technology. Both measurement and electro-magnetic (EM) wave simulation were performed up to 50 GHz. Transmission lines are frequently used at a length of half- or quarter-wavelength. With a shortened wavelength, a saving in silicon area of more than 67% can be achieved by using optimized slot-type floating shields. Experimental results demonstrated a higher effective relative permittivity value, improved by a factor of more than 9, and a better quality factor, improved by a factor of more than 6, as compared to conventional transmission lines. A novel transmission line de-embedding technique is presented. With this technique, the left- and right-side ground-signal-ground (GSG) probe pads can be extracted directly using two transmission line test structures of length L and 2L. An additional through structure is designed using via stack de-embedding, which is unique amongst current de-embedding methods. The advantages of the proposed method include the following: (1) a smaller silicon area; (2) the consideration for discontinuity between the pad and interconnect; (3) the consideration for substrate coupling and contact effects; (4) the employment of via stack de-embedding; and (5) the solution to the over de-embedding. The proposed novel methodology could be considered as a breakthrough in the area of ultra-high frequency de-embedding and should enable more accurate RF models to be developed. In the proposed methodology, intrinsic slow-wave coplanar waveguide (CPW) transmission line structures are placed on the inter-level metallization layers, as they are the most appropriate RF device for a cascade-based de-embedding method involving the via stack de-embedding technique. Experimental results have demonstrated that attenuation loss and wavelength can be optimized by changing the metal density and the metal layer positions of the floating shields. With a shortened wavelength, a reduction in silicon area of more than 66% can be achieved by using optimized slot-type floating shields located both above and below the CPW structure.
呂坤庭. "Transmission Quality Analysis for High Performance Serial Bus,IEEE 1394-1995." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/48636817895305552445.
Повний текст джерела中華大學
電機工程學系碩士班
90
In this thesis statistical method is used to analyze the transmission quality of high-speed serial bus with consideration both of jitter and skew. The one-way (unidirectional) transmission circuit models for physical layer of IEEE 1394 data-strobe encoding scheme and the traditional data/clock scheme are constructed. It is shown that the transmission quality (Bit Error Rate) of the former is superior to the latter for tolerance of higher jitter. Consecutively, two-way (bi-directional) circuit model for IEEE 1394 is constructed and analyzed. Both of jitter and skew will degrade the performance of high-speed serial transmission.
Prakash, Amit. "Architectures and algorithms for high performance switching." Thesis, 2004. http://hdl.handle.net/2152/1295.
Повний текст джерелаPrakash, Amit Aziz Adnan. "Architectures and algorithms for high performance switching." 2004. http://wwwlib.umi.com/cr/utexas/fullcit?p3143451.
Повний текст джерелаRosales, Roberto. "Integrated silicon bipolar wideband frequency modulation circuits for high-performance analog lightwave transmission." Thesis, 2003. http://hdl.handle.net/2429/14894.
Повний текст джерелаLu, Shu-ping, and 盧淑萍. "A New Huffman Encoding Scheme for Low Power High Performance NRZI Based Data Transmission." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/35595983716122362647.
Повний текст джерела國立臺灣科技大學
電子工程系
97
With the rapid growth of multimedia processing technologies, image and video compression are widely used on the network access. In recent years, there has been increased interest in the field of low power image compression and data transmission. Few studies, however, about low power data transmission for compressed image and video were presented. The compressed files are frequently transmitted on the network even though an image is usually compressed only once. For this reason, we can not neglect the power dissipation during transmitting data on the network. In order to overcome these difficulties, we improve the Huffman encoder of the JPEG flow to make the compressed data low power on transmission. Huffman encoder affects the behavior of transmission data directly since it is adopted as the last step of well-known image and video standards. On the other hand, Non Return to Zero, Inverted (NRZI) encoder is the first step in many telecommunication systems. In this thesis, thus, a low power data transmission scheme for NRZI based on Huffman encoding is presented. We propose a new Huffman table for the image and video compression to match NRZI encoder for reducing bit stuffing to achieve low power on data transmission. Simulation results test several images used by image processing research community. Our practical results indicate that the reduction rate in NRZI bit stuffing is from 22.05% to 83.95% compared with the standard JPEG compression. Therefore, it is observation that the file size after the proposed encoding process is less than that of the standard one. In other words, the compressed results can reduce power consumption during data transmission. The method provides a way to minimize the transmitted power under the same compression ratio.
Cheng, Rung-Shiang, and 程榮祥. "A Study on Transmission Control and Loss Recovery Schemes for High Performance TCP/IP Networking." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/87251841088483412996.
Повний текст джерела國立成功大學
電機工程學系碩博士班
96
The Transmission Control Protocol (TCP) provides a reliable host-to-host data transfer function in many network applications and plays a crucial role in controlling congestion throughout the Internet. The performance-related issues arising in TCP-based applications stem primarily from the various interactions between the internal TCP flow control and congestion control schemes and the surrounding communication environment. However, while many attempts have been made to improve the performance of TCP, the algorithms and parameters which are suitable for one environment are generally not transferable to others, and therefore TCP must be specifically adapted to different environments. Accordingly, this thesis discusses the fundamental problems and performance limitations of the TCP transport-layer protocol in various existing and emerging network systems and proposes a number of schemes for enhancing the TCP performance. The proposed schemes are quantified in terms of their achieved effective throughputs and are benchmarked against various existing TCP schemes. The numerical results confirm that the proposed schemes greatly enhance the performance of TCP over a variety of heterogeneous network environments.
Midya, Rivu. "HIGH PERFORMANCE SILVER DIFFUSIVE MEMRISTORS FOR FUTURE COMPUTING." 2017. https://scholarworks.umass.edu/masters_theses_2/477.
Повний текст джерелаChang, Ming-Cheng, and 張茗珵. "Analysis of High-Speed Digital Modules Emission Impact on Transmission Performance for Integrated Wireless Communications Platform." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/22114968597178021330.
Повний текст джерела逢甲大學
通訊工程所
99
Cloud computation and always-connected Internet have attracted the most industrial attention for the past few years. Meanwhile, with the development of IC technologies advancing toward higher operating frequencies and the trend of miniaturization on wireless communication products, the circuits and components are placed much closer than ever before. The system with highly integrated high-speed digital circuits and multi-radio modules are now facing the challenge from performance degradation by even more complicated platform EMI noisy environment. The EM noises emitted by unintentionally radiated interference sources may severely affect the receiving performance of antenna, and thus result in the severe performance degradation of wireless communication. Therefore, we have investigated and analyzed the EMI noise characteristics of commonly embedded digital devices for further high performance wireless communication design. Since the CAMERA or CMOS camera module is most adopted to the popular mobile devices such as cellular phone or Netbook, we hence focus on EMI analysis of the built-in camera module by application of IEC 61967-3 method. The concept of noise budget for devices on wireless communication product stems from the link-budget for RF Tx/Rx performance. It also borrows the idea from EMC testing requirements for automobile industry to identify the potential interference sources that might cause safety problem. In this study, we utilized the surface scan method with near-field electromagnetic measuring system equipped with visual interface to highlight and further analyze the field strength of emitted noise by color-enhanced pattern. From the spatial distribution of interference noise measured at specific interfered communications frequency range, we can identify the locations and radiation patterns of interference sources (digital ICs or traces). We finally used Langer near-field probe for surface scan measurement system to investigate the EMI noise from the Camera module in notebook computer, and therefore further to analyze the relationship between the wireless communications performance and Camera commands with throughput measurement, and related distance to antenna respectively. To improve the wireless communication TIS performance on notebook computer, we first investigated the EMI noise from the built-in camera module and analyzed the impact of various camera modes on performance with throughput measurement. We then utilized the near-field EM surface scanner to detect the EMI sources on notebook and locate the major noise sources around antenna area with 2-D hot-spot distribution plot. Finally, we designed and implemented periodic structures for isolation on the notebook computer to effectively suppress noise source-antenna coupling and improve the receiving sensitivity of wireless communication system. Keywords:RFI、Netbook、platform noise、Noise Budget
Wang, Hao-Lian, and 王皓練. "Refinement of High-Speed Circuit Board for 16x25 Gb/s Single-Mode Optical Transceivers and Transmission Performance Verification." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/k35z3x.
Повний текст джерела國立臺灣科技大學
電子工程系
107
This work successfully designs and manufactures a 400-Gb/s optical transceiver module for high-speed optical interconnect in the cloud data centers. The 400-Gb/s module is constructed with 16-channel transceivers that are allocated with 4 wavelengths and 4 single-mode fibers. It includes EML driver ICs, receiver ICs, high-speed EML sources, and photodetectors. Increasing the channel bandwidth and data rates is the main focus of research and development to meet the demand of high-speed optical transmission and interconnect. For data center applications, soon after the 100Gb/s optical transceivers were commercialized, 400Gb/s transceivers became the hottest topic for most fiber-optic vendors. This thesis successfully designed and enhanced the 16"×" 25 Gb/s optical transceiver module for 25 Gb/s NRZ signals. The high-speed circuit board uses a substrate with low dielectric loss. The differential transmission line is realized to reduce common mode noise. The high-frequency circuit simulation software is used to design and optimize the transmission lines and circuits. The simulated S-parameter and eye diagram are verified with the measurement results. The EML driver IC is used to generate the 25Gb/s NRZ signal, and the whole transceiver module is measured to transmit the signal along a single mode fiber for up to 10 km. Each channel can achieve <10-12 bit error rate with an optical power >-13 dBm.