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Lundström, Linnéa, and Sara Nordlund. "Exploring Co-management : A Minor Field Study on Lake Victoria Beach Management Unit in Ggaba, Kampala, Uganda." Thesis, Linköpings universitet, Tema Miljöförändring, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-128701.
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To manage common resources such as water bodies, forests and the air is complex since several stakeholders are involved and affected by the use of the resource. One way to manage common resources is through co-management. Co-management is a decentralized method that empowers the local level and enables collaboration between the government and the local community. Co-management within fishing communities can be realized through so called Beach Management Units (BMUs). Around Lake Victoria, there are 1087 BMUs. One of these BMUs is located in Ggaba, Kampala, Uganda and the purpose of this study is to highlight benefits and shortcomings connected to co-management within fisheries. The study aims to explore if and how sustainability aspects are tackled through the co-management of fisheries. The data was collected using qualitative semi-structured interviews where six BMU members contributed with their experiences. In addition, data was collected from a qualitative content analysis on two BMU guideline documents, representing the central level. The results showed that the Ggaba BMU provides a platform for creating control through collaboration. The local levels’ perception on co-management within fisheries seems to correspond with the central level’s aim of the management. Another indication is that the BMU has brought upon positive effects on economic, social and ecological aspects on the society of Ggaba. However, corruption and illegal fishing are two identified barriers which seems to limit the function of the Ggaba BMU and the level of co-management.Gemsamma resurser så som vattendrag, skogar och atmosfären är komplexa att hantera eftersom flera aktörer är involverade och påverkas av resursanvändningen. Ett sätt att hantera gemensamma resurser är genom samförvaltning. Samförvaltning är en decentraliserad förvaltningsmetod som möjliggör ett samarbete mellan den lokala och statliga nivån vid beslutsfattande. Omkring Victoriasjön realiseras samförvaltning genom så kallade Beach Management Units (BMUs). Dessa utgörs av 1087 stycken varav en BMU är lokaliserad i Ggaba, Kampala, Uganda. Syftet med denna studie är att belysa fördelar och brister kopplade till samförvaltning av fiske. Vidare syftar studien till att undersöka om och hur aspekter inom hållbar utveckling kan tacklas genom det decentraliserade styret av fiske. Data insamlades genom sex stycken kvalitativa, semistrukturerade intervjuer. Dessutom gjordes en kvalitativ innehållsanalys av två BMU-riktlinjedokument, vilka representerar den centrala nivån. Det empiriska materialet visade att Ggaba BMU utgör en plattform för strukturering, kontroll och samarbete. Den lokala nivåns syn på samförvaltning inom fiske verkar överensstämma med den centrala nivåns avsikt av samförvaltning. Resultatet indikerar även att BMUn har påverkat ekonomiska, sociala och ekologiska aspekter i Ggaba på ett positivt sätt. Problem med korruption och olagligt fiske identifierades dock, vilka verkar begränsa BMUns funktion och möjligheterna till samförvaltning.
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Tutam, Mahmut. "Configuring Traditional Multi-Dock, Unit-Load Warehouses." Thesis, University of Arkansas, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10839559.
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The development of expected-distance formulas for multi-dock-door, unit-load warehouse configurations is the focus of the dissertation. From formulations derived, the width-to-depth ratios minimizing expected distances are obtained for rectangle-shaped, unit-load warehouse configurations. Partitioning the storage region in the warehouse into three classes, the performance of a multi-dock-door, unit-load warehouse is studied when storage regions can be either rectangle-shaped or contour-line-shaped.
Our first contribution is the development of formulas for expected distance traveled in storing and retrieving unit loads in a rectangle-shaped warehouse having multiple dock doors along one warehouse wall and storage racks aligned perpendicular to that wall. Two formulations of the optimization problem of minimizing expected distance are considered: a discrete formulation and a continuous formulation with decision variables being the width and depth of the warehouse for single- and dual-command travel. Based on dock door configurations treated in the literature and used in practice, three scenarios are considered for the locations of dock doors: 1) uniformly distributed over the entire width of a wall; 2) centrally located on a wall with a fixed distance between adjacent dock doors; and 3) not centrally located on a wall, but with a specified distance between adjacent dock doors.
Our second contribution is the investigation of the effect on the optimal width-to-depth ratio (shape factor) of the number and locations of dock doors located along one wall or two adjacent walls of the warehouse. Inserting a middle-cross-aisle in the storage area, storage racks are aligned either perpendicular or parallel to warehouse walls containing dock doors. As with the warehouse having storage racks aligned perpendicular to the warehouse wall, discrete and continuous formulations of the optimization problem are developed for both single- and dual-command travel and three scenarios for dock-door locations are investigated.
Our final contribution is the analysis of the performance of a unit-load warehouse when a storage region or storage regions can be either rectangle-shaped or contour-line-shaped. Particularly, we consider two cases for the locations of dock doors: equally spaced over an entire wall of the warehouse and centrally located on a wall, but with a specified distance between adjacent dock doors. Minimizing expected distance, the best rectangle-shaped configuration is determined and its expected distance is compared with the expected distance in its counterpart contour-line-shaped configuration.
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Bork, John R. "Reverse Engineering a Microcomputer-based Control Unit." Bowling Green State University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1120167127.
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Sandberg, Daniel. "Automatiserad unit testning." Thesis, Blekinge Tekniska Högskola, Avdelningen för telekommunikationssystem, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3186.
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Dagens utveckling av mjukvara går snabbare och snabbare samtidigt som mjukvaran blir allt mer komplex. Att under dessa omständigheter kunna bibehålla en lika om inte högre kodkvalité är en utmaning. På UIQ bestämde de sig för att undersöka om ett automatiserat unit test kunde hjälpa dem. Metoderna för att komma fram till resultaten i denna rapport har varit intervjuer, en enkät, intern information och litteratur så som forskningsartiklar m.m. Denna rapport är en utredning av automatiserade test, vad man bör tänka på, vilka fördelarna är, vilka testfall som är möjliga att automatisera med mera. Rapporten kommer även att presentera grunderna i testning av mjukvara, en introduktion till eXtreme Programming och Test-Driven Development samt hur testningen utförs på UIQ idag. Då jag kom fram till att ett automatiserat unit test skulle passa sig bra på UIQ kommer jag i slutet av denna rapport presentera ett implementerings förslag. Man bör även införa en test driven utvecklings metodik för att säkerhetsställa att det kommer att utvecklas automatiserade testfall.Det första en utvecklare tänker på när man hör de tre magiska orden automatisk unit testning är att han äntligen slipper sitta med den tråkiga testningen. Medan chefen och ekonomiansvarige börjar räkna på hur mycket pengar de kan spara efter de sagt upp halva testavdelningen. Tyvärr får båda tänka om då oftast den automatiska testningen har lika lång utvecklingstid men förhoppningvis om den blir lyckad så förbättrar den kodkvalitén. Vilket kan vara minst lika mycket värt som att man sparar några kronor i minskade personalkostnader.
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Ganti, Anand 1975. "Mismatch capacity per unit cost." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9465.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.Includes bibliographical references (p. 48).
The mismatch channel capacity per unit cost represents the maximum number of bits per unit cost that can be transmitted reliably across a channel under receiver mismatch conditions. It's reciprocal is the minimal cost of transmitting a bit reliably under these conditions. We derive lower bounds for the mismatch channel capacity per unit cost and discuss some of its properties.
by Anand Ganti.
S.M.
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Rahmqvist, Elin. "On stochastic unit commitment for thermal power plants." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285519.
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Climate change is a fact, a crisis threatening every country, economy and human. Toprevent this crisis, the emission of greenhouse gases needs to decrease dramatically. 72%of global greenhouse gas emissions in 2016 came from energy production where electricityand heat account for 42% of the 72%. Nevertheless, coal power grew with 28% in2018 to meet the increased demand of electricity. It is therefore of utmost importancethat the resources used in power plants are distributed as efficiently as possible. Unitcommitment is a short-term planning formulation which is part of the planning chain forproduction of electrical energy. An accurate unit commitment can decrease emissionsand costs.The aim of this study is to implement a model for the stochastic behavior of the electricalload into unit commitment. With this, it shall be evaluated, whether this solutionis robust enough for usage in network control. The evaluation needs to assess the reliability,economic impact and the computational e↵ort for solving the stochastic unitcommitment problem.A test system has been created in MATLAB to evaluate the stochastic versus deterministicunit commitment formulation. Scenarios for the stochastic unit commitmenthave been generated by using a stationary, discrete-time Markov Chain to generate loadforecast errors. The Fast Forward Selection method has been used to reduce number ofscenarios to minimize computational e↵ort. The quality of the solution has then beenevaluated with value of the stochastic solution for economic analysis. Loss of load probabilityand energy not served have been used to evaluate the reliability.A stochastic approach gives a more robust solution but can be more expensive in termsof costs. Five scenarios were the optimal choice for the stochastic unit commitmentformulation. Increasing number of scenarios did not improve the reliability and resultedin a more expensive solution. The conclusion of this work can be contradictory but highlightsone of the challenges in electric power systems. A more robust system is usuallymore costly and therefore the players in the system must decide what is most desirablein this particular system. A more reliable but expensive system or a less reliable andless costly system.Klimatförändringarna är ett faktum, en kris som hotar varje land, ekonomi och människa.För att förebygga denna kris måste utsläppen av växthusgaser minska dramatiskt. 72 % av de globala utsläppen av växthusgaser år 2016 kom från energiproduktion där värme och elektricitet stod för 42 % av dessa utsläpp. Trots detta växte kolkraften med 28% år 2018 för att kunna möta den ökande efterfrågan på elektricitet. Det är därför av yttersta vikt att dessa resurser används på ett så e↵ektivt sätt som möjligt. En bra och exakt korttidsplanering av kraftsystem kan minska utsläppen och kostnaderna.Målet med denna studie är att implementera stokastisk last i korttidsplaneringen för ett mindre elkraftsystem med 11 enheter. Detta kräver en robust metod som begränsar beräkningstiden för att säkerställa kontinuerlig och säker drift av elkraftsystemet. Analysen måste utvärdera tillförlitligheten, ekonomiska e↵ekterna och beräkningstiden för att lösa det stokastiska korttidsplaneringsproblemet.Ett testsystem har skapats i MATLAB för att utvärdera den stokastiska kontra deterministiska korttidsplaneringsproblemet. Scenarier för det stokastiska korttidsplaneringen har genererats genom att använda en stationär Markov-kedja för att generera felen i lastprognosen och sedan använda Fast Forward Selection metoden för att minska antalet scenarier för att minimera beräkningsinsatsen. Stokastisk korttidsplanering har sedan utvärderats med värdet av den stokastiska lösningen för ekonomisk analys. Sannolikheten för bortkoppling av last samt icke levererad energi har beräknats för att utvärdera tillförlitligheten.En stokastisk metod ger en mer robust lösning men kan vara dyrare vad gäller kostnader. Fem scenarier var det optimala valet för den stokastiska korttidsplaneringsformuleringen. Ö kande av antal scenarier förbättrade inte tillförlitligheten och resulterade i en dyrare lösning. Slutsatsen i detta arbete kan kännas motsägelsefullt då den deterministiska metoden visar på lägre kostnader medans den stokastiska är mer robust. Detta belyser en av utmaningarna i elkraftsystem. Ett mer robust system är vanligtvis dyrare och därför måste aktörerna i systemet bestämma vad som är mest önskvärt i det specifika systemet. Ett mer tillförlitligt men dyrare system eller ett mindre pålitligt och billigaresystem.
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Ncube, Glen. "The making of rural health care in colonial Zimbabwe : a history of the Ndanga Medical Unit, Fort Victoria, 1930-1960s." Doctoral thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/11490.
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Includes abstract.Includes bibliographical references.
This thesis adopts a social history of medicine approach to explore the contradictions surrounding a specific attempt to develop a rural healthcare system in south-eastern colonial Zimbabwe (Southern Rhodesia) from the 1930s to the 1960s. Influenced by a combination of healthcare discourses and models, in 1930, the colony’s new medical director formulated the first comprehensive rural healthcare delivery plan, premised on the idea of ‘medical units’ or outlying dispensaries networked around rural hospitals. The main argument of the thesis is that the Ndanga Medical Unit, as this pioneer medical unit was known, was a variant of a typical colonial project characterised by tensions between innovative endeavours to control disease on the one hand, and the need to fulfil broader colonial ambitions on the other.
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Kepper, James H. IV. "MEMS IMU inertial measurement unit one-way-travel-time inertial measurement unit autonomous underwater vehicles." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113756.
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Thesis: S.M. in Oceanographic Engineering, Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 83-87).
Recent advances in acoustic navigation methodologies are enabling the way for AUVs to extend their submerged mission time and maintain a bounded XY position error. Additionally, advances in inertial sensor technology have drastically lowered the size, power consumption, and cost of these sensors. Nonetheless, these sensors are still noisy and accrue error over time. This thesis builds on the research and recent developments in single beacon one-way-travel- time (OWTT) acoustic navigation and investigates the degree of bounding position error for small AUVs with a minimal navigation strap-down sensor suite, relying mostly on a consumer grade microelectromechanical system (MEMS) inertial measurement unit (IMU) and a vehicle's dynamic model velocity. An implementation of an Extended Kalman Filter (EKF) that includes IMU bias estimation and coupled with a range filter, is obtained in the field on two OceanServer Technology, Inc. Iver2 AUVs and one Bluefin Robotics SandShark [mu]AUV. Results from these field trials on Ashumet Pond of Falmouth, Massachusetts, the Charles River of Cambridge, Massachusetts, and Monterey Bay near Santa Cruz, California show a navigation solution accuracy comparable to current standard navigation techniques.
by James H. Kepper, IV.
S.M. in Oceanographic Engineering
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Hansson, Johan, and Christian Bothén. "Design and construction of electronic control unit." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353124.
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The main objective of this project was to create a new, future-proofed, electroniccontrol unit for a test station at GE Healthcare in Uppsala. The control unit was tobe created in cooperation with the technical consultant firm Rejlers. The project consisted of two parts, one investigation part and one design part. The investigation part consisted of examining the previous control unit and its connection between the quality control station and the host computer. This examination resulted in a specification of requirements which was used as a basis in the design of the new control unit. The design part consisted of finding durable and reliable components that met the specification of requirements. During the design process the work was documented and compiled in a technical documentation for the control unit. The project resulted in a new control unit that was improved by using a programmable logic controller that was directly compatible with LabVIEW, moving external power supplies inside the control unit to limit the number of cables and adding cartridge fuses for safety. It also resulted in a full technical documentationof the unit, facilitating future maintenance. The new control unit was considered to be future-proofed, but in order to consider the entire test station future-proofed the quality control station would have needed to be replaced as well. At the time this report was written, the new electronic control unit had been designed and was under construction.
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Machuca, Julían, and Thomas Tuvesson. "PCB design of Power Distributor Unit (PDU)." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415474.
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The project idea was created from the demand of a renewal for a Power Distributor Unit also known as a PDU. The current product had successively turned in to a cable mess because of short term solutions. This made the product non user friendly, inconvenient and non-agile to handle troubleshooting. To develop this project, a PCB design was created by simplifying and improving circuit diagrams until satisfied. Once the final circuit diagram was obtained, a PCB layout design was created. The result of the project, due to limited time, was only theoretical. The finished product was not tested as there was no time allowing this.
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Kattoua, Khaled. "Floating production storage offloading unit structural fatigue analysis." Thesis, City University London, 2003. http://openaccess.city.ac.uk/7657/.
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This thesis examines the fatigue behaviour of FPSO structures. It has been compiled as a result of theoretical, analytical and experimental study. The Finite Element approach has been utilized to analyse the FPSO's structure. It is intended that this particular work will enable further computer simulations for fatigue assessment to be carried out. The thesis starts with the development of the general arrangement, structure and typical details of the City FPSO. The applied loads are then reviewed and this includes the so called static loads due to cargo loading and still water pressure, and the green loads due to dynamic loads induced by the vessel behaviour on waves at sea. Response to local loads such as, external sea pressure, internal pressure due to the cargo and ballast, wave slamming loads, etc. is then determined. The effect of the top structural loads on the FPSO is discussed with some practical calculation of typical topside processing palates loads. SCF evaluation methods are considered together with a discussion of the effect of structural dimensioning of local details, the use of specially performed test results conducted on ship structure. In particular, the structural stress concentration factor at the web-toe associated with the max loading conditions is developed. Confirmation of validity of the SCFs theory is provided from an extensive appraisal of the literature and from laboratory tests of the structure in question. The experimental technique developed in this thesis is based upon geometrical analogy to the simplified Peterson's Neuber notch theory, applied to the system parametric equations of SCFs and the geometric relations. The experimental results are in general accordance with published results. This research includes a calibration method for S-N Curves required for typical fatigue sensitive details in FPSOs. It also provides improved information on the important link between S-N data and finite element analysis for fatigue life assessment using a linear cumulative damage formulation.
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Gungor, Mustafa Kemal. "A Programmable Control Unit For Industrial Applications." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/772764/index.pdf.
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In this thesis, the automation of the long term and cyclic processes by using a programmable control unit is aimed.
To achieve this goal, timing relays and various microcontrollers are investigated. PIC microcontroller is chosen to implement the control unit due to its advantages like high speed, Harvard and RISC architecture, low cost and flexibility for programming. Theory of the PIC microcontrollers is studied and a controller unit to be used in the mentioned processes is designed. Some features are added to the device to widen the application fields and consequently a multi-purpose programmable controller is realized.
In the device, Microchip PIC16F877 is used as the microcontroller. The code of the controller is written in Assembly Language and is compiled with MPASM.
This controller counts the signals coming from internal Timer 555 or external signals and activates ten different outputs in order. The operating times of the outputs can be
changed by a keypad and shown in a display.
By keeping the number of the used ports of the microcontroller, as few as possible, room for the future improvements and additions is provided.
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Rojas, Folkers Eduardo. "Heat extraction for the CSPonD thermal storage unit." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65312.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, February 2011."February 2011." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 78).
Three coiled tube heat exchanger prototypes were designed to extract heat from containers holding 0.5 kg, 2.3 kg, and 10.5 kg of Sodium Nitrate-Potassium Nitrate salt. All of the prototypes were left with an open surface free to undergo radiation losses and surface convection. The first objective was to measure the power extraction over time for each prototype. Coiled tube heat exchangers were modeled as a tube with a constant wall temperature. Air is used as the working fluid, with a maximum Reynolds number of 2000 at a maximum flow rate of 10 standard liters per minute (SLPM) at air flow temperatures above 900°C. The accuracy of the power extraction model for the three prototypes in increasing order: 46 %, 35 %, and 43 % of the measured data. The duration of power extraction with an open top container for the first (P-1), second (P-l1), and third (P-II) prototype respectively are: 14 min, 29 min, 45 min producing an average power of 22 W, 23 W, and 22 W respectively. To compare across the prototypes, the data provided is for bath bulk temperatures starting at 330°C and ending at 275' C. Prototype three produced 25 W for 123 minutes for the same temperature change in the bulk temperature (330° to 275°C) with the lights off and a thermal lid, to reduce radiation and surface convection losses. The thermal lid improved the extraction duration by a factor of four. The second objective was to characterize the thermal loss rate (W) of the each prototype. The thermal loss rate model is accurate within 28.9 % (P-1), 28.7 % (P-11), and 24.7 % (P-III) of the measured values. There is evidence of convection cells in prototype two and three. A high temperature Particle Image Velocimetry (PIV) system has been proposed to measure the magnitude of the convection cells, and a proof of concept setup has been tested. Particles native to the molten salt are illuminated using a Class 3b laser (power <5mW). The laser beam is converted into a plane using a polypropylene conical centrifuge tube filled with water.
by Folkers Eduardo Rojas.
S.M.
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De, Heer Derrill Humanities & Social Sciences Australian Defence Force Academy UNSW. "Victoria per mentum : psychological operations conducted by the Australian Army in Phuoc Tuy Province South Vietnam 1965-1971." Awarded by:University of New South Wales - Australian Defence Force Academy. Humanities & Social Sciences, 2009. http://handle.unsw.edu.au/1959.4/40326.
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'Victoria per Mentum : Psychological Operations Conducted by the Australian Army in Phuoc Tuy Province South Vietnam 1965-1971' examines the Australian Army's conduct of psychological operations from 1965 to 1971 in South Vietnam. The study traces the first instances of psychological warfare in 1965, aided by the Americans, through to the establishment of 1 Psychological Operations Unit in April 1970 until November 1971, when Australians withdrew from South Vietnam. Most soldiers in the unit had no training in the art or practice of psychological warfare. Successes in the American sponsored South Vietnam amnesty program (Chieu Hoi) mirrored the success on the battlefield by Australian fighting soldiers. Psychological Warfare is a non-lethal weapon which has a multiplier effect on the enemy in the battle space. The inability to effectively demonstrate conclusively the effects of successful psychological warfare operations added to uncertainty and scepticism over the weapon's potential and actual impact on the battlefield. Conventional military leaders rejected psychological warfare as 'paper bullets' that had little or no place in a military focused agenda - shoot, blast bomb, fragment, kill and capture to defeat the enemy. Propaganda and counter-propaganda are examined to demonstrate how these effects influenced each side. The study examines difficulties the Australian 1 Psychological Operations Unit encountered when trying to provide demonstrable and tangible indicators, which meant that when forces to choose between leaflets, loudspeakers and firepower, combat leaders chose firepower. The result was that psychological warfare proved successful only in a limited tactical sense but never created the type of operational or strategic success sought by traditional weapons proponents.
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Ström, Joakim, and Jakob Sjölund. "Unit Test of Capsules using Google Test Framework." Thesis, Linköpings universitet, Programvara och system, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-125232.
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Software testing is an important part of modern system development. It is a collection of methods used to detect and correct bugs and faults found in software code. Unit testing is a widely used technique in software testing where individual units of source code are isolated, often divided up into classes and functions, and tested separately. When developing in a modeling environment, the system components and their respective behavior are expressed by models written in the Unified Modeling Language (UML). These model descriptions are then used to automatically generate programming code for compilation into real-time systems. The generated code can in turn be subjected to unit testing in order to aid in the verification of the systems behavior and functionality. The modeling tool Rational Software Architect RealTime Edition (RSARTE), developed by IBM, is one example of such an environment. The generated code from the UML models in RSARTE is designed to execute in a real-time computing C++ runtime environment. An essential building block for real-time functionality is the Capsule model. A capsule is an element with an internal state-machine and ports defining its behavior and communication with other capsules. This construction is of great help when programming concurrent real-time applications. Due to the complexity provided by the real-time runtime environment, it is difficult to isolate and unit test the behavior of designed capsules. In this thesis we will show that a capsule in this environment can be isolated and then subjected to unit testing with the help of an integrated third party unit test framework. Also, before integrating a suitable framework, we will select one by doing a review, discussion and a comparison of different mature and available unit test frameworks for use in the C++ language.
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Erol, Umit Levent. "DEVELOPMENT OF A LOWER EXTREMITY EXOSKELETON POWER UNIT." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1619385500249639.
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Vlachos, Georgios M. Eng Massachusetts Institute of Technology. "Multi-unit auction revenue with possibilistic beliefs." Thesis, Massachusetts Institute of Technology, 2017. https://hdl.handle.net/1721.1/122392.
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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (page 25).
The revenue of traditional auction mechanisms is benchmarked solely against the players' own valuations, despite the fact that they may also have valuable beliefs about each other's valuations. Not much is known about generating revenue in auctions of multiple identical copies of a same good. (In particular the celebrated Vickrey mechanism has no revenue guarantees.) For such auctions, we (1) put forward an attractive revenue benchmark, based on the players' possibilistic about each other, and (2) construct a mechanism that achieves such benchmark, assuming that thplayers are two-level rational (where the rationality is in the sense of Aumann).
by Georgios Vlachos.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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Rasmussen, Nichlas. "Operator unit simulator." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-45676.
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Detta examensarbete utfördes som ett uppdrag av Atlas Copco där målet var att utveckla en programvara som kan simulera en OU (Operator Unit) i en PC miljö. Atlas Copcos egenutvecklade radiostyrningssystem för gruvfordon består av en sändare, kallad OU, och en mottagare, kallad MU (Machine Unit). En OU är en kontroller med reglage i form av knappar, joysticks och switchar och med indikatorer i form av LEDs och display. För att säkerställa att en OU endast kan kommunicera med en specifik MU och vice versa måste enheternas radiomoduler paras ihop genom en process som kallas ”learn link”, som görs genom att ansluta en CAN-kabel mellan enheterna. Genom att använda en OU simulator vid MU produktionstest skulle det vara lättare att utföra vissa tester, såsom internfel och varningar, och det skulle vara möjligt att inkludera tester som är omöjliga att göra med en hårdvaru-OU, som att avsiktligt sända en felberäknad checksumma, för att undersöka MU-enhetens respons. OU simulatorn skulle ha ett grafiskt gränssnitt och genom att ansluta ett radiokort till PC:n skulle den kunna skicka och ta emot data från en MU. Den skulle också kunna utföra ”learn link”. Den färdiga produkten utvecklades med hjälp av C# och en XP-inspirerad utvecklingsmetod.This thesis was developed as an assignment from Atlas Copco where the goal was to develop software that could simulate an OU (Operator Unit) in a PC environment. Atlas Copco’s proprietary radio-control system for mining vehicles consists of a transmitter, called OU, and a receiver, called MU (Machine Unit). An OU is a controller with controls in the form of buttons, joysticks and switches and with indicators in the form of LEDs and display. To ensure that an OU only can communicate with a specific MU and vice versa the units’ radio modules must be paired together through a process called “learn link”, that is performed by connecting the units with a CAN-cable. By using an OU simulator for MU production tests it would be easier to perform some tests, such as internal errors and warnings, and it would be possible to include tests that are impossible to do with OU hardware, such as intentionally send a miscalculated checksum, to examine the MU’s response. The OU simulator should have a graphical user interface and by connecting a radio card to the PC it should be able to send and receive data from an MU. It should also be able to perform “learn link”. The final product was developed using C# together with an XP-inspired development method.
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Kopfinger, André, and Daniel Ahlsén. "Identification of absolute orientation using inertial measurement unit." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-39713.
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Because of the limitation of GPS indoors there is a demand for alternative methods to accurately determine both position and orientation. Previous attempts at positional tracking has required an infrastructure of hardware and sensors to provide the path of an object or person. This is not a mobile solution to a mobile problem. This project aims to answer the question if it is possible to use an Inertial measurement unit sensor for this application. It will also create a prototype device that will demonstrate the capabilities of the proposed method. The goal of the project is to reach an accuracy of ±20 cm for position and ±5 degrees for rotation. A Kalman filter will be used to filter the output from the sensor in order to get more stable and accurate readings. The results show that it is possible to determine position of ±20 cm up to 100 cm with the proposed method. An inertial measurement unit is capable of measuring rotation accuracy of ±5 degrees and a prototype has been designed and manufactured to demonstrate the method.
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Chenna, Subbanagari Uday Kumar Reddy. "A special unit to speed up a DSP processor." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10108176.
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Digital Signal Processing (DSP) processors are used in personal computers, smart phones, multimedia devices, etc. Traditional DSP processors with custom logic must meet the demand for increased processing speed. The main aim of the project is to design a 32-bit integer arithmetic processor and to implement it. This design has three major processing features. First, the speed must be optimized by using a hazard free control unit. Second, it must have a two stage pipeline. Third, a single cycle multiply accumulator is utilized. The main advantage of the two stage pipeline is that it can manipulate the instructions, and it can produce correct cycle timing even though there may be hazards. A reduced instruction set is used in this design. A filtering operation is included in order to differentiate the DSP processor from a traditional processor. The processor is designed using Harvard architecture in which both data memory and program memory are accessed simultaneously. This design increases the processing speed by 30%.
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Abraham, Justin Kuruvilla. "Study of the TR Synchronization and Video Conversion Unit." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/14137.
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This dissertation describes the design and testing of a model of the Synchronization and Video Conversion Unit (SVCU), a subsystem of the tracking radar (TR) at Denel Overberg Test Range (OTR). The SVCU synchronizes all the radar sub-systems and also converts the returned RF target signals to digital numbers. The technology within the SVCU is outdated and spares are scarce if not unattainable. This study forms the first phase of the development of a new SVCU and will determine the specifications of the hardware needed to build the replacement. Models of the transmit and receive chain of the radar were first developed in SystemVueTM. A comprehensive literature review was then done, yielding an accurate model of the current SVCU. The radar model was run, with simulated target and scene parameters, and its output fed into the SVCU model. The output of the SVCU was then processed by a CFAR detector and gated tracking algorithms implemented in MathLang and Python. The simulated target was correctly identified in the range-Doppler plane. The tracking gates (used to measure range and Doppler) were then corrupted with jitter, rise- time and offsets. A statistical analysis was done on the effect of these impurities on the radar measurements. A new SVCU architecture, utilizing high speed ADCs and digital integrators, was then tested. The effects of non-linearities (DNL and INL) in the ADC and phase noise on the ADC sample clock on the radar measurements were analysed. The jitter on the transmit sync (TX), the ADC sample clock and tracking gates were found to be the most critical aspects of the SVCU. To meet the specified measurement accuracy of the radar, the root-sum-square of the jitter on these syncs (jitter budget) must not exceed 30 nanoseconds. A case study was then done to determine the jitter budget achievable in an FPGA-centric SVCU design. The study concluded that a jitter budget of 30 ns is achievable. Moreover, in an FPGA based design the jitter introduced by the interface sending the TX sync from the FPGA (SVCU) to the transmitter assembly will, almost entirely, determine the range accuracy of the TR. From these findings, a new SVCU, based on the RHINO board from the UCT RRSG, was recommended and the future work outlined.
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Anctil, Benoit. "Signal classification issues in motor unit number estimation." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31043.
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In the electrophysiological evaluation of neuromuscular disorders, the number of active motor units in a muscle is considered one of the most important indicators of the physiological state of peripheral nerve/muscle systems. Electrophysiological techniques have been designed to estimate this number but, despite considerable effort, they only provide an approximation of the exact number. To assist further development in this field, the specific problem of the classification of stimulus-evoked potentials was investigated. Over 1300 series of signals were recorded from four subjects over a five-week period. From these data sets, those having clearly separable unique responses were selected and unsupervised learning methods were employed to identify the different response classes. The lowest misclassification error rate obtained under these conditions was 25%. A subsequent evaluation of an interactive graph-theoretic clustering technique presented interesting results with an error rate of 8%. The findings hold promise for developing better methods to estimate the number of motor units.
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Sharp, David. "Systems Engineering Self Assessment of an Air Force Acquisition Unit." Digital Commons at Loyola Marymount University and Loyola Law School, 2009. https://digitalcommons.lmu.edu/etd/429.
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In February of 2009, our unit performed a Systems Engineering {SE} Self Assessment using the Air Force Systems Engineering Assessment Model (AF SEAM}. The AF SEAM consists of 190 SE best practices spanning the following ten SE Process Areas: Configuration Management, Decision Analysis, Design, Manufacturing, Project Planning, Requirements, Risk Management, Sustainment, Technical Management and Control, and Verification and Validation.
During the SE Self Assessment, we graded our unit on a pass/fail basis for each SE best practice. The SE best practices are split into Specific Practices and General Practices. The former only apply to one of the ten SE Process Areas, while the later apply to all ten SE Process Areas. The unit's score for each SE Process Area is an average of the percentage of passing Specific Practices and the percentage of passing General Practices.
Our unit received passing grades for Configuration Management, Manufacturing, and Sustainment; and failing grades for Decision Analysis, Design, Project Planning, Requirements, Risk Management, Technical Management and Control, and Verification and Validation.
In addition to grading the unit's SE based on best practices, the SE Self Assessment collected the participants' comments. This report is an analysis of these comments; the intent of this report is to capture useful comments and distill them into actionable findings.
Analysis of the SE Self Assessment uncovered 120 key findings that fall into 20 SE problems. In an attempt to hone in on the most pressing SE problems, each problem was evaluated based on the number of findings per problem, the feasibility of solving the problem, and the potential gain for solving the problem. As a result of this evaluation, the top SE problems facing our unit are as follows: inadequate communication, insufficient training, and unclear roles and responsibilities. In order to address these SE problems, this report recommends the following:
Inadequate Communication: The unit should matrix four people into the Development Squadron covering the following disciplines: Configuration Management, Information Assurance, Requirements, and Test and Evaluation. These Systems Engineers would report to the Engineering Division Chief, but they would work with the Development Squadron on a day to day basis.
Insufficient Training: The unit should pursue an aggressive training program to improve general and SE knowledge. The following courses and presentations should be developed: Unit 101 as a newcomers orientation, Intro to the Systems Engineering Plan and Intro to the Systems Test Plan to socialize these important documents, Integrated Product/Process Team (IPT) Training to improve our teaming skills, Eight Step Problem Solving Method as a Decision Analysis tool, and AF SEAM Mastery as a way to use the model to teach basic SE principles. Also, the unit leadership should encourage personnel to enroll in SE certificate and masters programs.
Unclear Roles and Responsibilities:The unit should assign a SE Process Champion to each of the ten SE Process Areas. These champions would be the focal people for improving each area. Also, a SE Process
Improvement Lead should be created. The SE Process Improvement Lead and the SE Process Area Champions would work towards the goal of achieving passing marks in the next SE Self Assessment held in February, 2010.
Note: All of the material contained in this report has been scrubbed to remove references to people, as well as project names. For example, a specific hardware intensive project is described as "hardware project" instead of its name. Other generalizations include the following: software project, technology demonstration (tech demo} project, component, contractor, and FFRDC. The reader's patience is appreciated when these sanitization efforts sometimes result in incongruent phrases.
A note on tense: This paper uses the first person tense. This is intentional. I am a member of the unit studied, and thus I stand to benefit or suffer from the consequences of any implementation suggested in this report. Exclusive use of the third person would imply a distance and impartiality that does not exist.
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Beniušis, Mantas. "Kelto „Victoria Seaways“ šilumokaičio ir aušinimo vamzdyno virpesių tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_155131-41138.
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M. Beniušis „Kelto „Victoria Seaways“ šilumokaičio ir aušinimo vamzdyno virpesių tyrimas“. Laivų projektavimo ir statybos magistratūros studijų programos baigiamasis darbas. Darbo vadovas dr. P. Mažeika, Klaipėdos universitetas: Klaipėda, 2014. Raktažodžiai: virpesiai, laivas, keltas, virpesių tyrimai, šilumokaitis. Baigiamojo darbo teorinėje dalyje aprašoma virpesių klasifikacija, pagrindiniai virpesių žadintojai ir analizuojami įvairūs virpesių lygio mažinimo laive, virpesių skaičiavimo būdai. Eksperimentinėje dalyje pateikiama keltų „Victoria Seaways“ ir „Athena Seaways“ aušinimo sistemos dalies virpesių matavimo metodika. Nagrinėjami reiso Klaipėda-Kylis-Klaipėda metu atliktų matavimų rezultatai, bei nustatomos tiriamos aušinimo sistemos dalies padidintų virpesių lygio priežastys. Paskutinėje darbo dalyje pateikiamos išvados ir rekomendacijos.M. Beniušis “Vibration research of heat exchanger and cooling piping in Victoria Seaways ferry”. Final work of the master studies of ship design and building program. Academic supervisor Dr. P. Mažeika, Klaipeda University: Klaipėda, 2014. Keywords: vibrations, ship, ferry, vibration research, heat exchanger. The theoretical part of the final work describes the classification of vibration, main excitations of vibration and analyses various methods for reduction of the vibration level on board and vibration calculation. The experimental part presents the vibration measurement methodology in the cooling systems of Victoria Seaways and Athena Seaways ferries. It examines the results of measurements carried out during Klaipėda-Kiel-Klaipėda trip and identifies the reasons for the recent level of vibration in the analysed cooling system. The final part of the work contains the conclusions and recommendations.
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Jain, Sheetal A. 1980. "Low-power single-precision IEEE Floating-point unit." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87426.
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Michelson, Jonathan E. (Jonathan Erik). "Design and optimization of Fugu's user communication unit." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39387.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.Includes bibliographical references (leaves 45-46).
by Jonathan E. MIchelson.
M.Eng.
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Lou, Ip Keong. "Unit production control system for garment industry." Thesis, University of Macau, 2002. http://umaclib3.umac.mo/record=b1445660.
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Nayakanti, Nigamaa. "Flexigami : folded polygonal unit cells for deployable metamaterials and mechanisms." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104281.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 83-85).
Deployable and transformable structures are of broad interest for applications including satellites and space exploration, temporary shelters, packaging, transportation, robotics and medical devices. One emerging approach to scalable fabrication of such structures involves the general concept of Origami-inspired design along with cutting, folding, and fastening of sheet materials. However, contrasting the classical approach of modeling Origami structures as having perfect hinges and rigid panels, consideration of the finite bending and rotational stiffness of these elements is essential to understand their constituent mechanics. Moreover, meta-materials and functional structures having fundamentally new mechanical properties can be designed this way. We present the design, fabrication and mechanics of a novel, deployable cellular material, which we call Flexigami. The unit cell takes the form of two parallel regular polygons, connected by a circuit of diagonally creased panels. Upon compression, individual unit cells transform either gently or abruptly between two stable equilibrium states depending on the interplay between hinge and panel properties. The mechanical behavior of each unit cell can be deterministically designed via geometry, dimensions and topology of the panels and hinges. Individual unit cells can collapsed reversible to less than 10% of their deployed volume. Within this transition regime, the force-displacement curve of each cell can be tuned to exhibit a smooth compression behavior or an instability followed by a self-reinforcing response. We use finite-element models complemented by analytical and computational analysis of the results to understand the importance of different mechanical properties of constituent hinges and panels and also demonstrate the fabrication of flexigami cells and mechanisms in various structural materials. Finally we present different mechanisms and their subsequent applications.
by Nigamaa Nayakanti.
S.M.
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Warren, David S. "The design of a deep space transponder regenerative ranging unit." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/35026.
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Sung, Ho-Joon. "Optimal maintenance of a multi-unit system under dependencies." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26511.
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Thesis (Ph.D)--Aerospace Engineering, Georgia Institute of Technology, 2009.Committee Chair: Schrage, Daniel; Committee Member: Loewy, Robert; Committee Member: O'Neill, Gary; Committee Member: Saleh, Joseph; Committee Member: Volovoi, Vitali. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Armitage, Neil Philip. "A unit stream power model for the prediction of local scour." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52716.
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Thesis (PhD)--Stellenbosch University, 2002.ENGLISH ABSTRACT: Local scour is the erosion of a riverbed resulting from the flow of the river around an obstacle. It is a principal cause of failure of bridges and other hydraulic structures. Current design practice relies on the use of empirical formulae that are often extremely inaccurate, or on the use of physical models that are very expensive. Recent advances in the power of microcomputers have however made numerical simulation increasingly attractive. One obstacle to numerical simulation though is that there is no general agreement on the concept of incipient motion, that critical point at which motion - and hence scour - begins. In this dissertation, the unit stream power model developed by Rooseboom (1992) is extended to handle the complex three-dimensional flow conditions that pertain close to the riverbed in the vicinity of an obstacle. The relationship between unit stream power (the dissipation function) and the Movability Number (the ratio of the shear velocity to the terminal settling velocity of the critical sediment particles) is clearly indicated. Since incipient motion is probabilistic in nature, a relationship was established between the Movability Number and the intensity of motion with allowance for bed-slope and relative depth. An extension of this work resulted in a new bed-load transportation equation that could be used to determine the rate of scour development. Physical modelling in a laboratory flume aided the selection of suitable critical conditions for the onset of scour. The usefulness of the above-mentioned relationships was then demonstrated through the construction of a simple mathematical model of scour and deposition around a structure. This model was used in conjunction with commercially available computational fluid dynamics (CFD) software to predict the scour potential around typical engineering structures. Physical model data was obtained for four situations, and the measured scour was compared with that predicted by the numerical model. There was reasonable agreement between the different models and such differences as there were could be readily attributed to constraints on the numerical model, in particular the lack of a free-surface routine and the coarseness of the grid. This dissertation has opened up a new method for the prediction of local scour that could be readily extended to include all types of scour. With the advent of increasingly fast computers, it could become a useful engineering tool that would assist engineers in the design of safe and cost-effective foundations for hydraulic structures.
AFRIKAANSE OPSOMMING: Plaaslike uitskuring is die erosie van 'n rivierbed as gevolg van vloei verby 'n obstruksie. Dit is 'n belangrike oorsaak van die swigting van brfïe en ander hidrouliese strukture. Bestaande ontwerppraktyk berus op empiriese vergelykings wat dikwels hoogs onakkuraat is, of op fisiese modelle, wat baie duur is. Numeriese simulasie het die afgelope tyd 'n al hoe meer aantreklike opsie geword danksy die snelle toename in die kapasiteit van mikro-rekenaars. 'n Struikelblok met numeriese simulasies is die gebrek aan konsensus oor die konsep van begin-van-beweging, daardie kritieke toestand waarby beweging en derhalwe uitskuring begin. In hierdie proefskrif is die eenheidstroomdrywing model, ontwikkel deur Rooseboom (1992), uitgebrei om die komplekse drie-dimensionele vloeitoestande, wat teenaan die rivierbodem verby 'n obstruksie heers,te hanteer. Die verwantskap tussen Eenheid Stroomdrywing (Dissipasiefunksie) en die Beweeglikheidsgetal (verhouding tussen sleursnelheid en die ewewigvalsnelheid van die kritieke sedimentpartikels ) is duidelik uitgewys. Aangesien begin van beweging probabilisties van aard is, is die verwantskap bepaal tussen die Beweeglikheidsgetal en die Intensiteit van Beweging, met voorsiening vir bodernhelling en relatiewe diepte. Verdere uitbreiding het gelei tot 'n nuwe bedvrag vervoervergelyking wat gebruik kan word om die tempo van uitskuring te bepaal. Kritieke toestande, waarby uitskuring begin, is met fisiese modelle in die laboratorium gekwantifiseer. Die bruikbaarheid van bogenoemde verbande is gedemonstreer deur die ontwikkeling van 'n eenvoudige wiskundige model van uitskuring en afsetting rondom 'n struktuur. Hierdie model is saam met bestaande kommersiële sagteware vir vloeidinamika berekenings (CFD) ingespan om uitskuringspotensiaal rondom tipiese ingenieurstrukture te voorspel. Fisiese modelmetings van uitskuring vanaf vier uitlegte is vergelyk met die numeries voorspelde waardes. Bevredigende ooreenkoms is gevind en verskille kon geredelik gewyt word aan beperkings van die numeriese model, veral die gebrek aan' n vryvlakroetine en die growwe maas. Die proefskrif stel 'n nuwe metode vir die voorspelling van uitskuring daar wat geredelik uitgebrei kan word na ander vorms van uitskuring. Met die ontwikkeling van al vinniger rekenaars kan dit 'n nuttige hulpmiddel vir ingenieurs word om veilige en koste-doeltreffende fondamente in waterlope te ontwerp.
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Altwieb, Miftah Omar. "Modelling and optimisation of heat exchanger integrated in fan coil unit." Thesis, University of Huddersfield, 2018. http://eprints.hud.ac.uk/id/eprint/34544/.
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The Fan Coil Unit (FCU) is an integral part of heating, ventilation and air conditioning systems used in residential and commercial buildings. One main component of this device is a multi-tube and fin heat exchanger. Improvement of thermal performance in such heat exchangers is vital for improved performance of FCU. Performance improvements in the FCUs are mainly limited by available technology, manufacturing capabilities and overall cost effectiveness of the design. Better thermal performance usually comes at a cost of higher pressure drop or more expensive materials and manufacturing costs. In this thesis, a global framework for design and optimisation was developed taking into account overall costs of design, manufacturing and operation. Full 3D CFD models of multi-tube and fins heat exchanger were developed to investigate complex and non-uniform flow on water and air sides of the device. The CFD models were developed to enable local heat transfer analysis within the FCU. Experimental setup to evaluate performance of the heat exchanger has been designed and built. Different configurations of heat exchanger were tested experimentally and numerically, including the baseline configuration, so called plain fins. More efficient design of louvre fins and and fins with vortex generating mechanism (perforation in the fin surfaces) were also investigated. Best thermal performance was found to be for the perforated louvre fins. CFD model was validated against experimental results and obtained data was used to create a novel semi-analytical prediction model for Fanning friction factor (f) and Colburn factor (j). Appropriate costs calculation model was also developed and employed for total costs estimation of the FCU over the period of 15 years. The framework proposed in this thesis for optimised design and development strategy of heat exchangers resulted in development of a novel design which offers significant improvements in comparison to the current design. This new optimised design of the heat exchanger (with perforation in louvre fins) increased thermal performance by additional 10% while the total costs increased by only 6%.
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Liu, Haiyong 1972. "An experimental investigation of a passive cooling unit for nuclear plant containment." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85273.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.Includes bibliographical references (leaves 84-86).
by Haiyang Liu.
S.M.
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Robertson, Leanne. "Development of an electronic control unit for the T63 gas turbine." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/9145.
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Includes bibliographical references.Fundamental research has been undertaken at the SASOL Advanced Fuels Laboratory to investigate the effects of the chemistry and physical properties of both conventional and synthetic jet fuels on threshold combustion. This research was undertaken using a purpose built low pressure continuous combustion test facility. Researchers at the laboratory now wish to examine these effects on an aviation gas turbine in service for which “off-map” scheduling of fuel to the engine would be required. A two phase project was thus proposed to develop this capability; the work of this thesis embodies Phase I of that project.
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Zhuang, Fulin 1956. "Optimal generation unit commitment in thermal electric power systems." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75896.
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This thesis is devoted to the optimal commitment of generation units in an all-thermal, single or multiple area, power system. The problem, known as unit commitment, is a nonlinear mixed program typically with thousands of 0-1 integer variables and diverse constraints. An exact optimal solution to the problem is only possible via (explicit or implicit) enumeration, which requires a prohibitively long computation time for large problem instances.Two optimization approaches, Lagrangian relaxation and simulated annealing, are explored in this thesis for efficient and near-optimal unit commitment.
Lagrangian relaxation combines the solution of the dual of the unit commitment problem with feasibility search to obtain primal feasible solutions. The feasibility search is necessary because a solution to the dual seldom solves the primal, and because little theory is available to bridge the optimal dual and primal solutions. In this thesis, several new feasibility search procedures to find a near-optimal primal feasible solution from the dual solution are developed and tested. These procedures are independent of the data constituting different problem instances, and are more rigorous and systematic than the existing ones. With these procedures, Lagrangian relaxation is successfully and efficiently applied to both single and multiple area unit commitment.
Simulated annealing exploits the resemblance between a minimization process and the cooling of a molten metal. The method generates feasible solution points randomly and moves among these points following a strategy which leads to a global minimum in a statistical sense. Simulated annealing is very flexible for handling diverse and complicated constraints, such as those typical of the unit commitment problem. Simulated annealing is analyzed, evaluated and implemented for unit commitment in this thesis.
Five major algorithms, proposed in this thesis for unit commitment and reserve-constrained economic dispatch, are extensively tested and compared by numerical simulation on sample power systems of 10 to 100 units. The simulation results show the efficiency of the tested algorithms for large-scale unit commitment and demonstrate the general applicability of simulated annealing. A comparison with the priority list method and a study of the convergence rates of the subgradient type algorithms are also included in the simulation.
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Hosseini-Doust, Zahra. "Mapping Gaussian belief propagation on the graphics processing unit." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121472.
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With the introduction of programmable graphical processing units (GPU) in the last decade, Heterogeneous computing systems have become more popular. It has been predicted that by leveraging the power of the GPU's many cores, many applications can experience improved performance in the near future. However porting applications to the GPU in most cases cannot be automated due to the GPU's unique architecture. Mapping problems on the GPU has been researched in many diverse fields. Many problems in science and engineering come down to solving sparse systems of linear equations. Nevertheless conventional iterative solvers are not feasible tools for large sparse systems. One of the novel iterative solvers proposed in recent literature is the Gaussian belief propagation (GaBP) method. This method uses recursive message updates on a graphical model. In this work a variant of GaBP algorithm was implemented on the GPU. The implementation was successfully tested with FEM (finite element method) data. The parallel implementations achieved up to 4× improvement in execution time, compared to the serial CPU implementation.Avec l'introduction d'unités de traitement graphiques programmables (GPU) durant la dernière décennie, les systèmes informatiques hétérogènes sont devenus plus populaires. On pense qu'en exploitant la puissance des nombreux cœurs du GPU, de nombreuses applications pourront bénéficier de meilleures performances dans un avenir rapproché. Cependant, dans la plupart des cas le fait de porter des applications vers le GPU ne peut pas être automatisé à cause de l'architecture unique du GPU. Les problèmes de mappage sur le GPU ont été l'objet de recherches dans de nombreux domaines. Beaucoup de problèmes en science et en ingénierie consistent simplement à résoudre systèmes d'équations linéaires creux. Étant donné que les systèmes creux qui croissent à l'aide de solveurs itératifs classiques ne seront pas réalisables, un des nouveaux solveurs itératifs proposés dans la littérature récente est la méthode de croyance des propagations gaussiennes (GABP). Cette méthode utilise des messages de mise à jour récursifs sur un modèle graphique. Dans ce travail, une variante de l'algorithme GABP fut mise en place sur le GPU. La mise en œuvre a été testée avec succès avec des données FEM (méthode des éléments finis). Les implémentations parallèles ont atteint une amélioration du temps d'exécution jusqu'à 4 × par rapport à l'implémentation de série du CPU.
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Cheekiralla, Sivaram M. S. L. 1980. "Development of a wireless sensor unit for tunnel monitoring." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/30043.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.Includes bibliographical references (p. 133-138).
In this thesis we describe the development of a wireless sensor module for tunnel monitoring. The tunnel in question is a part of the London Underground system. Construction of a new tunnel beneath the existing tunnel is anticipated to cause quantifiable vertical displacement. To ensure safe operation of the tunnel during the construction activity, a real-time monitoring system has been created to measure vertical displacements along the critical zone near Highbury & Islington station. A geomechanical analysis, provided by a third party, is used to establish the allowable maximum displacement. A custom wireless sensor module was developed from off-the-shelf components. This module consists of a sensor device, microcontroller, ADC and RF transmitter. The integration of these components is described in detail. Deployment details and some preliminary results are presented.
by Sivaram M.S.L. Cheekiralla.
S.M.
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Shrestha, Joseph, and H. David Jeong. "Automated Unit Price Visualization Using ArcPy Site Package in ArcGIS." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etsu-works/5474.
Full textAbstract:
State Departments of Transportation (DOTs) in the U.S. have an increasing amount of digital data from various sources. One such set of data is structured unit price data collected from bid lettings. Such data contain unit prices of thousands of bid items from hundreds of projects every year. While state DOTs have such data from over a decade-long period, utilizing such data has been challenging because of the lack of automated analytical and visualization methodologies and tools to generate meaningful and actionable insights. This study develops an automated methodology to quickly and accurately generate color-coded visualization maps representing unit price variation across a geographical region. It uses Inverse Distance Weighted (IDW) technique that is based on the Toblers First Law of Geography. The law states that points closer together in space are more likely to have a similar value than points that are farther away. The methodology is automated using ArcPy site package in ArcGIS. It imports unit price data from preformatted spreadsheets and boundary maps from existing ArcGIS shape files to generate unit price maps. The tool and the visualizations are expected to aid state DOTs in generating and communicating meaningful insights for making data-driven decisions. It can be used to investigate areas with higher unit prices for various items which can aid state DOTs in identifying potential causes of higher unit prices such as lack of competition and lack of sources of materials (e.g. quarry) in nearby locations.
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Chiou, Albert (Albert C. ). "Design study of a novel computer instruction execution unit." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45998.
Full textAbstract:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.Includes bibliographical references (p. 32).
The goal of the "Fresh Breeze Project" is to develop a multi-core chip architecture that supports a better programming model for parallel computing. This architecture combines simultaneous multithreading, a global shared address space, no memory update, and a cycle-free heap to provide a platform for robust, general-purpose, parallel computation. These design choices help simplify classically hard problems such as memory coherency, control flow, and synchronization. An HDL implementation of the core execution unit of a single processing core (many cores are on a single chip) forms the basis of further simulation and synthesis. The design must first be broken down into functional logic blocks and translated into hardware modules. The language Bluespec Verilog allows this description to be constructed in terms of higher-level "guarded atomic actions" triggered by a rule based system.
by Albert Chiou.
M.Eng.
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Yi, Jon Rong-Wei 1975. "Corpus-based unit selection for natural-sounding speech synthesis." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/16944.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.Includes bibliographical references (p. 179-196).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Speech synthesis is an automatic encoding process carried out by machine through which symbols conveying linguistic information are converted into an acoustic waveform. In the past decade or so, a recent trend toward a non-parametric, corpus-based approach has focused on using real human speech as source material for producing novel natural-sounding speech. This work proposes a communication-theoretic formulation in which unit selection is a noisy channel through which an input sequence of symbols passes and an output sequence, possibly corrupted due to the coverage limits of the corpus, emerges. The penalty of approximation is quantified by substitution and concatenation costs which grade what unit contexts are interchangeable and where concatenations are not perceivable. These costs are semi-automatically derived from data and are found to agree with acoustic-phonetic knowledge. The implementation is based on a finite-state transducer (FST) representation that has been successfully used in speech and language processing applications including speech recognition. A proposed constraint kernel topology connects all units in the corpus with associated substitution and concatenation costs and enables an efficient Viterbi search that operates with low latency and scales to large corpora. An A* search can be applied in a second, rescoring pass to incorporate finer acoustic modelling. Extensions to this FST-based search include hierarchical and paralinguistic modelling. The search can also be used in an iterative feedback loop to record new utterances to enhance corpus coverage. This speech synthesis framework has been deployed across various domains and languages in many voices, a testament to its flexibility and rapid prototyping capability.
(cont.) Experimental subjects completing tasks in a given air travel planning scenario by interacting in real time with a spoken dialogue system over the telephone have found the system "easiest to understand" out of eight competing systems. In more detailed listening evaluations, subjective opinions garnered from human participants are found to be correlated with objective measures calculable by machine.
by Jon Rong-Wei Yi.
Ph.D.
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Allen, Eric H. (Eric Hickcox). "Stochastic unit commitment in a deregulated electric utility industry." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9951.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.Also issued in leaves.
Includes bibliographical references (p. 237-239).
by Eric H. Allen.
Ph.D.
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Nackoul, David Douglas. "Text to Text : plot unit searches generated from English." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61175.
Full textAbstract:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 51).
The story of Macbeth centers around revenge. World War I was started by an act of revenge. Even though these two stories are seemingly unrelated, humans use the same concept to draw meaning from them. Plot units, revenge included, are the common set of structures found in human narrative. They are the mistakes, the successes, the revenges and the Pyhrric victories. They are the basic building blocks of stories. In order to build a computational model of human intelligence, it is clear that we must understand how to process plot units. This thesis takes a step in that direction. It presents an English template for describing plot units and a system that is capable of turning these descriptions into plot-unit searches on stories. It currently processes 26 plot units, and finds 10 plot units spread out over Macbeth, Hamlet, the E-R Cyber Conflict, and a collection of legal case briefs.
by David Douglas Nackoul.
M.Eng.
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Reddy, Goutam. "Using a gimbal to calibrate an inertial measurement unit." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/37077.
Full textAbstract:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.Includes bibliographical references (p. 79-82).
In this thesis, an inertial measurement unit (IMU) consisting of 3 accelerometers and 3 rate gyros is created using off-the-shelf sensors from STMicro and Analog Devices. A novel technique for calibrating the orientation, position, scaling and offset of each of the sensors on the IMU is developed. A gimbal consisting of three concentric rings, with rotary encoders measuring the rotation between rings is designed. The IMU is fixed to the inner ring of the gimbal and rotated in space. By sweeping appropriate orientations of the IMU at appropriate rates, filtered sensor values can be mapped to "true" angular velocities and linear accelerations computed from the gimbal rotations. The sensor parameters are estimated via. MMSE, and a Kalman filter is implemented to estimate the IMU's attitude (roll and pitch angles) from the raw sensor values. The calibrated sensors are found to track the pitch angle with a mean-square-error of 1.7427 degrees, and the roll angle with a mean-square-error of 3.1387 degrees. The novel outcome of this thesis is that it defines a technique for calibrating IMUs with component sensors that need not be orthogonal in placement.
by Goutam Reddy.
M.Eng.
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Park, Joseph Seung Young. "Predicting intensive care unit patient outcomes through patient similarity." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123036.
Full textAbstract:
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: M. Eng. in Computer Science and Molecular Biology, Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 85-86).
An ICU stay involves invasive treatments, and frequently, the decision to continue therapy is made with limited information based on the physician's personal experience. This thesis proposal describes a tool to assist this decision by identifying similar patients and using their outcomes for prediction. We used the eICU Collaborative Research Database (eICU-CRD) v2.0 for the project. Different time varying and time constant features about the patient's demographics and clinical trajectory was used as input data, such as patient age and longitudinal blood pressure measurement. Using this information, a Cox Proportional Hazards model was built to map the multivariate time series of input data to a univariate time series, which was used to match the patient to a cohort of similar patients. Based on the cohort, this model predicted the probability of a healthy discharge by using the aggregate outcome of the cohort for prediction.
by Joseph Seung Young Park
M. Eng. in Computer Science and Molecular Biology
M.Eng.inComputerScienceandMolecularBiology Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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Kupferschmidt, Benjamin. "INTEGRATING ENGINEERING UNIT CONVERSIONS AND SENSOR CALIBRATION INTO INSTRUMENTATION SETUP SOFTWARE." International Foundation for Telemetering, 2007. http://hdl.handle.net/10150/604520.
Full textAbstract:
ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, NevadaHistorically, different aspects of the configuration of an airborne instrumentation system were specified in a variety of different software applications. Instrumentation setup software handled the definition of measurements and PCM Formats while separate applications handled pre-flight checkout, calibration and post-flight data analysis. This led to the manual entry of the same data multiple times. Industry standards such as TMATS strive to address this problem by creating a data-interchange format for passing setup information from one application to another. However, a better alternative is to input all of the relevant setup information about the sensor and the measurement when it is initially created in the instrumentation vendor’s software. Furthermore, an additional performance enhancement can be achieved by adding the ability to perform sensor calibration and engineering unit conversions to pre-flight data visualization software that is tightly coupled with the instrumentation setup software. All of the setup information can then be transferred to the ground station for post-flight processing and data reduction. Detailed reports can also be generated for each measurement. This paper describes the flow of data through an integrated airborne instrumentation setup application that allows sensors and measurements to be defined, acquired, calibrated and converted from raw counts to engineering units. The process of performing a sensor calibration, configuring engineering unit conversions, and importing calibration and transducer data sheets will also be discussed.
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Gomez, Connie Sun Wei Shokoufandeh Ali. "A unit cell based multi-scale modeling and design approach for tissue engineered scaffolds /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/1766.
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Fraser, Douglas (Douglas H. ). "Triptycene side unit effects on compressive yield strength in polycarbonates." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35071.
Full textAbstract:
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.Includes bibliographical references (leaf 25).
Polycarbonates have long been studied for their excellent mechanical toughness. Adding side units to polycarbonate could increase physical properties of the polymer. The role of triptycene in polycarbonate was studied by adding a low concentration of triptycene-containing polymer chains, and using compression testing. The triptycene polycarbonate was a blend created from two separate products. Differential Scanning Calorimetry was used to determine if the samples had phase separated. Thermal degradation of the samples was checked for using Thermogravimetric Analysis. Results indicated that triptycene-containing polycarbonates had higher compressive yield strengths than non-triptycene polycarbonates. The polymers were stronger due to the interlocking mechanism and the steric hindrance of the triptycene units. The design of strengthening polymers by adding triptycene units could prove useful to improve high performing polymers, or to give low molecular weight polymers more stability.
by Douglas Fraser.
S.B.
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Yalamanchili, Pranavi. "A MULTI-LEVEL IMPLEMENTATION OF IMAGE AMPLIFICATION ON THE GENERAL PURPOSE GRAPHICAL PROCESSING UNIT." Scholarly Commons, 2017. https://scholarlycommons.pacific.edu/uop_etds/3659.
Full textAbstract:
Image amplification is an important image enhancement technique for applications such as medicine, satellite imaging, forensic sciences, remote sensing, among others. The existing techniques are highly computationally intensive and take a lot of time to execute on conventional processors. Their highly computationally intensive nature makes them a good fit for massively parallel architectures such as the general-purpose graphical processing unit (GPGPU) devices. In this research, we accelerate a state-of-the-art image amplification technique on Nvidia’s GPGPU device, Kepler GK110 using the Compute Unified Device Architecture (CUDA) programming model. The technique comprises four computationally intensive stages namely Canny edge detection, vertical edge preservation, horizontal edge preservation and mean preserving interpolation. Using efficacious CUDA optimization techniques, we successively map the four stages of the algorithm to the GPGPU device, creating a hierarchy of five implementations. The final implementation of the hierarchy completely maps all of the algorithm stages to the GPGPU device, eliminating any costly intermediate host-device computations and focusing more on useful computations.
We provide a detailed analysis of the kernel time and end-to-end application time obtained for each implementation in the hierarchy. We also compare the GPGPU execution time for each algorithm stage with the equivalent serial implementation. We discuss an empirical method for identifying optimal GPGPU execution configuration to maximize the device utilization.
All of the GPGPU kernels executed on the Kepler GPGPU device achieve high speedup, as high as 90x, versus the optimized serial implementation. In addition, for the largest image size of 10240x10240, the most optimal GPGPU implementation achieves an end-to-end application speedup of 11.75x versus the serial counterpart. The research also presents the analysis on the implementation of the application on Amazon Web Services’ instances. This analysis further provides an opportunity to study the scalability of the application.
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Salas, Jorge Martin 1961. "Combinational Logic Unit implementation for the AHPL simulator HPSIM2." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277094.
Full textAbstract:
The use of Computer Hardware Description Languages plays an important role in the design automation process of digital systems. These languages help hardware engineers to provide a precise description of the internal structure of a system, and one of the most significant uses of these languages is as a means of input to a system simulator. AHPL is a hardware description language that describes a digital system as a set of modules and units. This language is supported by a function-level simulator (HPSIM2), but the simulator only provides support to the module descriptions of a system. This paper presents an improved version of the simulator that supports the use of unit descriptions called Combinational Logic Units or CLUNITs. The syntax and structure of a CLUNIT is analyzed, the operation and data structure of the simulator is given; and several examples are given to support these discussions.
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Ten, Po-Kiong. "Organophilic pervaporation : engineering science analysis and design tool." Thesis, University of Bath, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343769.
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