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Dissertations / Theses on the topic 'Stack performance'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Marinos, Ilias. "Network and storage stack specialisation for performance." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/288228.

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In order to serve hundreds of millions of users, contemporary content providers employ tens of thousands of servers to scale their systems. The system software in these environments, however, is struggling to keep up with the increase in demand: contemporary network and storage stacks, as well as related APIs (e.g., BSD socket API) follow a `one-size-fits-all' design, heavily emphasising generality and feature richness at the cost of performance, leaving crucial hardware resources unexploited. Despite considerable prior research in improving I/O performance for conventional stacks, substantial

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Borge, Chavez Maria Fernanda. "Understanding and Improving the Performance of Read Operations Across the Storage Stack." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21671.

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We live in a data-driven era, large amounts of data are generated and collected every day. Storage systems are the backbone of this era, as they store and retrieve data. To cope with increasing data demands (e.g., diversity, scalability), storage systems are experiencing changes across the stack. As other computer systems, storage systems rely on layering and modularity, to allow rapid development. Unfortunately, this can hinder performance clarity and introduce degradations (e.g., tail latency), due to unexpected interactions between components of the stack. In this thesis, we first perform

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Zhou, Huisheng. "Performance Evaluation of Small TCP/IP Stack on Low Power Processor." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98662.

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The uIP is an open source TCP/IP stack capable of being used with tiny 8- and 16-bit microcontrollers. Leon3 is a low power, high performance 32-bit processor. In this thesis, a port of uIP to Leon3 has implemented in order to see the performance of a minimal TCP/IP stack on a low power, high performance processor. An improved checksum calculation for uIP is implemented in order to utilize the 32-bit architecture resources. The purposes of making this analysis is to see how much the performance improvement can be achieved by using more advanced processor and more improved checksum calculation

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Protopopov, Boris Vladimirovich. "Effects of communication protocol stack offload on parallel performance in clusters." Diss., Mississippi State : Mississippi State University, 2003. http://sun.library.msstate.edu/ETD-db/theses/available/etd-06272003-120226/unrestricted/etd%5Fbprotopopov%5F070903.pdf.

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5

Edwards, Tyler A. "A Parametric Study of Stack Performance for a 4.8kW PEM Fuel Cell." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1275667559.

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Ji, Shengjie. "DE4NF : HIGH PERFORMANCE NFV FRAMEWORKWITH P4-BASED EVENT SYSTEM." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1588000703683216.

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7

Wong, Siu. "Investigating the performance of drainage stack of high rise buildings in Hong Kong." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/62512/.

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The design and proper operation on the above-ground drainage systems can be challenging in a densely populated city like Hong Kong. Discharge loading imposed to a single vertical stack can be large enough that those systems without a proper design, installation or maintenance would suffer problems such as backflow of foul water, contaminated foul air, or even soil waste to the sanitary fitments at lower floors. Any of these nuisances can be regarded as failure because the soil and waste water cannot be properly disposed away from a building. The risk of such a failure would be higher in densel

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Steinhoff, Robert J. "A Performance Comparison of Tree-Based Genetic Programming versus Stack-Based Genetic Programming versus Stack-Based Genetic Programming Using the Java Virtual Machine." NSUWorks, 2000. http://nsuworks.nova.edu/gscis_etd/859.

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Stack-based genetic programming uses variable length, linear programs executing on a virtual stack machine. This concept was proposed and evaluated by Timothy Perkis. The Java programming language uses a stack-based virtual machine to perform operations. This paper examined the possibility of performing stack-based genetic programming directly using the stack on the Java virtual machine. The problems of combining stack based genetic programming with the Java virtual machine stack were explored. Excessive runtime delay on bytecode verification of the chromosome carrying classes undergoing fitne

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Ansary, B. M. Saif. "High Performance Inter-kernel Communication and Networking in a Replicated-kernel Operating System." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78338.

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Modern computer hardware platforms are moving towards high core-count and heterogeneous Instruction Set Architecture (ISA) processors to achieve improved performance as single core performance has reached its performance limit. These trends put the current monolithic SMP operating system (OS) under scrutiny in terms of scalability and portability. Proper pairing of computing workloads with computing resources has become increasingly arduous with traditional software architecture. One of the most promising emerging operating system architectures is the Multi-kernel. Multi-kernels not only addr

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10

Peer, Andrea J. "Performance Testing and Modeling of Ultra-High Strength Steel and Complex Stack-Up Resistance Spot Welds." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1493403670252986.

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Bland, David William. "In-Plane Cyclic Shear Performance of Interlocking Compressed Earth Block Walls." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/495.

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This thesis presents results from testing of interlocking compressed earth block (CEB) masonry shear walls. CEBs are low strength earth masonry units sometimes stabilized with cement or lime. The interlocking compressed earth blocks (ICEBs) used in this experiment are dry stacked interlocking hollow units, which can be reinforced and grouted after they are laid. Although significant research has been undertaken to optimize the material properties of CEBs, little has been done to investigate the performance of structural systems currently being built using this technology. Test results are r

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Bandari, Swamy Devender Vamshi Krishna, and Sneha Adike. "Design and Performance of an Event Handling and Analysis Platform for vSGSN-MME event using the ELK stack." Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17800.

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Data Logging is the main activity to be considered in maintaining a server or database in working condition without any errors or failures. Data collection can be automatic, so, no human presence is necessary. To store the data of logs for many days and visualizing became a huge problem in recent days. Coming to node SGSN-MME, which is the main component of the GPRS network, which handles all packet switched data within the mobile operator's network. A lot of log data is generated and stored in file systems on the redundant File Server Boards in SGSN-MME node. The evolution of the SGSN-MME is

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Ambers, Steven Ellis. "In-Plane Shear Wall Performance as Affected by Compressed Earth Block Shape." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1705.

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This thesis investigates the in-plane shear performance of full-scale walls made from compressed earth blocks. Compressed earth blocks are a type of masonry where the blocks are composed of compressed soil and typically dry-stacked without mortar. Prior research has demonstrated that the in-plane shear strength of these blocks falls far short of capacities predicted by conventional masonry building codes, requiring new testing to develop effective and safe designs for seismic conditions. This thesis specifically studies the effects of block type and the use of grouted shear keys at the block h

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Bayon, De Noyer Maxime P. "Tail buffet alleviation of high performance twin tail aircraft using offset piezoceramic stack actuators and acceleration feedback control." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/12499.

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Fu, Yen-Chun. "Realisation of III-V Tunnel-FET with in-situ ultimate scaled gate stack for high performance power efficient CMOS." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30588/.

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The main objective of this thesis is realising a non-planar III-V Tunnel-FET for low power device applications. The differentiating aspect of this work is based around clustered inductively coupled plasma (ICP) etch and atomic layer deposition (ALD) tools. This approach was intended to mitigate native oxide formation on etched III-V surfaces prior to gate stack deposition by ALD. The use of a cluster tool also offers the benefit of cleaning III-V surfaces “in-situ” using low damage plasma based approaches. In addition, activity on scaling the equivalent oxide thickness of the gate stack and ev

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Haloun, Petr. "Business intelligence application in online retail." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-358920.

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The thesis focuses on application of business intelligence in online retail. The work summarizes the benefits of BI usage in online retail and provides an overview of the areas, where BI and Analytics is commonly used. Further, the thesis includes theoretical research with primary focus on business performance evaluation metrics and describes BI market leaders. The performance metrics theoretical research is supported by a survey in a global online fashion retail company that author conducted and summarized. Moreover, a practical design and implementation of a specific real-life BI solution is

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Allenstein, Jacob T. "An Investigation of Jet Engine Test Cell Exhaust Stack Aerodynamics and Performance through Scale Model Test Studies and Computational Fluid Dynamics Results." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586515794023938.

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Bogati, Rajendra. "Performance Evaluation of Non-commercial LTE Network For Smart Grid Application : Modification of IEC 61850-90-5 Protocol stack and its Testing over Non-commercial LTE." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-219621.

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The introduction of smart grid technology has changed the way traditional power grid network function. It made the grid structure more dynamic by enhancing electrical usage management capability. Also, it has increased the scope to enhance communication infrastructure in a smart grid structure. The current smart grid solution is based on IEC 61850 architecture where the exchange of information between the electrical utilities is over the fast Ethernet LAN connection. This communication mechanism is fast, efficient but lacks scalability, flexibility and less susceptible to failure. Also, earlie

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Freitas, Marcelo Silva. "Comparação de desempenho entre TCP/IP sobre ATM e ATM nativo." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-18062008-114753/.

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Com o recente desenvolvimento de tecnologias de redes de altas taxas de transmissão, tais como Asynchronous Transfer Mode (ATM), o problema da carência por largura de banda foi solucionado. A questão atual é a implementação de sistemas que suportem os protocolos ATM de forma nativa e integral. Atualmente tem-se utilizado aplicativos tradicionais baseados nos protocolos TCP(UDP)/IP no topo da pilha de protocolos ATM. Tal modelo traz redundâncias que implicam diretamente em aumento de overhead na comunicação. Muitos modelos têm sido desenvolvidos para levar de forma direta a aplicação os serviço

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Sivasankaran, Visweshwar. "Manufacturing and characterization of single cell intermediate-temperature solid oxide fuel cells for APU in transportation application." Thesis, Dijon, 2014. http://www.theses.fr/2014DIJOS027/document.

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La fabrication de cellules de piles à combustible IT-SOFC de large dimension par un nouveau procédé simple et peu coûteux est présentée dans ce manuscrit. L’optimisation de ce nouveau procédé en regard de l’utilisation d’agents de porosité, d’épaisseur de couches et de température de frittage a été réalisée. Les résultats des tests électrochimiques sur des cellules de surface active 10 cm2 réalisés dans le dispositif Fiaxell semi-ouvert ont été détaillés pour différentes cellules. Des tests de performance de longue durée ont également été menés sur le dispositif Fiaxell, présentés et discutés.

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Cheng, Wei. "Factor Analysis for Stock Performance." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050405-180040/.

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Ouertani, Rym. "Algorithmes de décodage pour les systèmes multi-antennes à complexité réduite." Phd thesis, Télécom ParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00718214.

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Durant ces dernières années, un grand intérêt a été accordé aux systèmes de communication sans fil ayant plusieurs antennes en émission et en réception. Les codes espace-temps permettent d'exploiter tous les degrés de liberté de tels systèmes. Toutefois, le décodage de ces codes présente une grande complexité qui croit en fonction du nombre d'antennes déployées et de la taille de la constellation utilisée. Nous proposons un nouveau décodeur, appelé SB-Stack (Spherical Bound-Stack decoder) basé sur un algorithme de recherche dans l'arbre. Ce décodeur combine la stratégie de recherche du décodeu

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Altaf, Saadia, and Ghenadie Cospormac. "Demutualization of stock exchanges : A case study : London Stock Exchange and Hong Kong Stock Exchange." Thesis, University of Skövde, School of Technology and Society, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-3129.

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<p><p>The focus of this study is to evaluate the impact of corporate ownership structure on the overall performance of stock exchanges. This study distinguishes in particular mutual versus demutualized ownership. London Stock Exchange and Hong Kong Stock Exchange are chosen as study cases, because London Stock Exchange is one of the world leading stock exchanges and Hong Kong Stock Exchange is definitely one of the most important emerging market stock exchanges. That is why the results obtained by comparing these two stock exchanges could serve as good indicator in understanding the effects of

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Gouveia, André Gonçalves Pinto de. "An alternative stock index for benchmarking portuguese investment funds." Master's thesis, Instituto Superior de Economia e Gestão, 2011. http://hdl.handle.net/10400.5/10136.

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Mestrado em Finanças<br>O índice PSI 20 é o padrão de referência por excelência da Euronext Lisboa. No entanto, os gestores de fundos portugueses que investem em ações nacionais podem não ter a possibilidade de replicar a carteira do PSI 20, devido às restrições ao investimento impostas pela regulação europeia para os mercados financeiros, nomeadamente as Diretivas UCITS. Este trabalho vai analisar até que ponto estas limitações podem ser impeditivas da performance dos fundos de investimento. É feita uma caracterização da legislação aplicável, bem como do segmento de fundos de investimento em

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Huang, Yan. "Long-term abnormal stock performance : UK evidence." Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/3657.

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One of the most controversial issues for long-term stock performance is whether the presence of anomalies is against the efficient market hypothesis. The methodologies to measure abnormal returns applied in the long-run event studies are questioned for their reliability and specification. This thesis compares three major methodologies via a simulation process based on the UK stock market over a period of 1982 to 2008 with investment horizons of one, three and five years. Specifically, the methodologies that are compared are the event-time methods based on models (Chapter 3), the event-time met

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Chen, Yen-Chih, and 陳彥志. "Experimental study on stack performance in Thermoacoustic engine." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/93898324409786348129.

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碩士<br>臺灣大學<br>應用力學研究所<br>98<br>The study was a series of fundamental research of thermoacoustic engine (TAE). At first, the qualitative experiment was focused on the styrofoam ball visualization in the quarter wave TAE and the measurement of axial sound amplitude distribution in the TAE. The results showed that the axial velocity and sound amplitude distribution were the same with the quarter wave resonator. The axial velocity distribution in the quarter wave rectangular resonator was also measured by the hot wire anemometry. The Michelson type of interferometer was also applied to measure the

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Chia-HsienKang and 康嘉顯. "Performance of kW-scale Water-cooled PEMFC Stack." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/4kqqvv.

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碩士<br>國立成功大學<br>航空太空工程學系<br>103<br>In this study, a kW-scale water-cooled PEMFC stacks is designed and tested under different conditions, including fuel conditions, inlet water temperatures , inlet water flow rates, in order to understand effects of the above three parameters on the stack performance and impedance. Based on the qualitative analysis of the experimental results, the gas parameters and thermal management conditions which make the water-cooled PEMFC stack best to be uniform thermally are applied to the stack. The experimental results show that the best performance of this stack, 1

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Lee, Chi-Hung, and 李志宏. "Thin bipolar plate design and performance on DMFC stack." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/94135449387880850684.

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碩士<br>元智大學<br>機械工程學系<br>95<br>The volume of stack is mainly from thickness of the bipolar plate. The research aims to reduce the volume of the stack, design new flow channel and make use of new commercial MEA(140mWcm-2 at 0.2V) to promote the performance of the stack. The result of new design showed that stack performance of 57mWcm-3 at 1.4V when using oxygen as reactant and 38mWcm-3 at 1.4V when using air as reactant. The ability of distributing fuel was fine under observing stability during long time. Fixing operating condition and testing different loading current was to observe the consu

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Lin, Yu-Sheng, and 林育昇. "Influence of Clamping Force on the Performance of PEMFC Stack." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/27659303454427272871.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>96<br>Recently, there is a tendency toward larger reactive area and higher current in PEMFC stack design. The design of assembly of a PEMFC stack becomes much more complex and important than just a single cell. The assembly mechanism will affect the contact behavior between bipolar plates and membrane electrode assemblies （MEAs）and hence the performance of PEMFC stack. Inadequate clamping pressure may lead to leakage of fuels, high electric impedance and malfunction of the cells. On the other hand, excessive clamping pressure may destroy the MEA. This study is t

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Wei-FengHong and 洪偉峰. "Design and Performance Test of a Water-Cooled PEMFC Stack." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/31640098721459481875.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>101<br>There are several technical obstructions to overcome for the commercialization of PEMFCs. One of the most critical issues is the water and thermal management which has been considered a key factor to an uniform electrochemical reaction and a proper water content in the MEA. There is a considerable amount of heat while operating a stack, especially at a high current density. The waste heat could lead to dehydration of the MEA locally or globally if an improper thermal management. In this work, a 5-cell liquid-cooled PEMFC stack was designed and deve

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Hu, Shu-Hao, and 胡書豪. "Modulization and Performance Analysis of Direct Methanol Fuel Cell Stack." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/53196258497912055321.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>98<br>The main purpose of this thesis is to develop a modulized stack direct methanol fuel cell (DMFC) and to integrate stack DMFC with the balance of plant (BOP). The motivation of this study is to develop a portable stack DMFC that could supply the power not only to BOP, but also to external loadings. In the first part of this thesis, three types of DMFC flow channels, including the traditional serpentine flow channel; the smooth corner serpentine flow channel and the unilateral crooked serpentine flow channel were fabricated. Experimental investigations into the

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Wang, Chun-Lin, and 王俊麟. "High performance open cathode PEMFC stack development for lightweight UAV applications." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/31538423056620979074.

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碩士<br>元智大學<br>機械工程學系<br>105<br>The lightweight unmanned aerial vehicle (UAV), integrated network of things, artificial intelligence, sensors and new energy technologies, is one of the future innovation industry, which can be applied to the military, commercial and entertainment industry. Such as aerial photography, agriculture, environmental and traffic monitoring VAV machines, and the most critical future network transport service UAV. Among them, the energy technology, how to use fuel cells to extend flight time can be more practical for the logistics industry and long-time detection applica

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Hsu, Che-Jung, and 許哲榮. "Design and performance analysis of metal bipolar plate on PEMFC stack." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/52450341805798282836.

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碩士<br>元智大學<br>機械工程學系<br>98<br>In this study, we used low-cost, lightweight aluminum alloy bipolar plate on proton exchange membrane fuel cell(PEMFC) stack. Aluminum alloy has good heat Thermal conductivity and mechanical strength. But, aluminum alloy surface oxides lead to poor conductivity, high contact resistance. So we using Au-coated on aluminum alloy bipolar plate surface. Assembled into a single cell and 4-cells stack to measure performance. At H2/Air stoichimotry 1.2/4.0 and humidification temperature of 60 ℃ for best performance by single cell 61.6W and stack maximum power 286W. The dy

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Chaung, Ya-Chu, and 莊雅竹. "A study of the lighting performance for the lighting-Ventilation Stack." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/77cej2.

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碩士<br>國立臺北科技大學<br>建築與都市設計研究所<br>96<br>Taiwan, located in subtropical area, has a good potential to efficiently utilize the abundant natural sunlight for its geographical feature. Therefore, increasing daylighting in buildings by employing designs such as natural lighting and ventilation not only improves the quality of indoor light to create comfortable indoor environment, but also decreases energy consumption. The objective of this research is to study the effects of design factors on lighting performance in buildings in Taiwan. In this study, we established full-scale model to investigate

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Li, Chih-Hsien, and 李芝嫺. "A Study of the Ventilation Performance for the Lighting-Ventilation Stack." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/5twvne.

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碩士<br>國立臺北科技大學<br>建築與都市設計研究所<br>96<br>Remarkable advance have been made in city which transforms the high density of residential areas. That forms the building types to high-raised or dense cluster styles. Hence, the mechanical systems are largely used in order to maintain or create safe and comfortable conditions. The disadvantage due to the large lean of mechanical system brings carrying capacity of environment. Some studies present that natural ventilation is one of useful strategies provided that the air change rate is satisfactory. According to some successful projects in Taiwan, th

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Fioravanti, Sara. "Performance engineering of multi-level meta-modeling architectures based on J2EE stack." Doctoral thesis, 2018. http://hdl.handle.net/2158/1119732.

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Non-functional requirements of changeability and adaptability have primary relevance for a large class of software intensive systems that are intended for managing great volumes of data with a high degree of variety in the structure of contents. The attainment of these qualities can be largely facilitated by the assumption of a tailored software architecture. The Reflection architectural pattern is an elegant reusable solution to design software applications based on a meta-model that provides a self-representation of the types used in the domain model. This provides significant benefits in t

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ZOU, Yu-Wei, and 鄒毓偉. "Performance Evaluation of Acceleration Structures with Stack for Ray Tracing in OpenCL." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/39547408781783473244.

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碩士<br>國立臺灣師範大學<br>資訊工程學系<br>105<br>Ray tracing is an Algorithm that used to render picture in computer graphics. It is based on ray in physical properties and imitates the natural phenomena of ray, which makes the rendered scene becomes more realistic. However, the cost of improving realistic is must compute a large number of operations in ray tracing. In order to improve this disadvantage, OpenCL is used to perform parallel computing on multi-core platform, and the object in the scene is constructed as an acceleration structure that called Bounding volume hierarchy tree. The acceleration meth

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Chen, Chien-ming, and 陳建銘. "Development of a Long-term Operation DMFC Stack with no Performance Decay." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/18719100467678023927.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>98<br>In this thesis, a long-term operation direct methanol fuel cell (DMFC) stack with no performance decay is developed. In a passive DMFC, its performance will decay after a short period, if the weak methanol solution is supplied. Although the strong methanol solution may slightly increase the operating time, it tends to crossover leading to cathode Pt particle poisoned, and it is still unable to maintain long-term operation stably. In our passive DMFC, there are two chambers in the anode. They are a pure methanol chamber and a 2~3M methanol solution chamber.

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Chen, Yu-Chu, and 陳昱碁. "Flow Characheristics and Performance tests of a Direct Methanol Fuel Cell Stack." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/23362424971313157368.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>97<br>Direct methanol fuel cell（DMFC） itself is a small-scale power plants,When the methanol and oxygen react to generate electricity.The electricity can be continuously generated when the fuel is continuously supplied. DMFC has the advantage of high efficiency, low pollution and low noise.It becomes one of the most developed fuel cells. This thesis focuses on the investigation of the flow characteristics and performances of a DMFC stack using a fuel-cell performance and the laser Doppler velocimetry. The test system parameters include distances between the fan and

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Meng-HanLiu and 劉孟翰. "Study on Performance of PEMFC Stack Design with Stainless Steel Bipolar Plates." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/admbu4.

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Chen, Jion-You, and 陳俊佑. "Design and performance analysis of metal bipolar plate on kW-class PEMFC stack." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/44592178098472552820.

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碩士<br>元智大學<br>機械工程學系<br>99<br>In this study, we used aluminum alloy bipolar plate on proton exchange membrane fuel cell(PEMFC) stack. Aluminum alloy has good heat thermal conductivity and mechanical strength than graphite. But the aluminum alloy surface oxides not only stuck the flow channels plate also make poor conductivity, high contact resistance at high humidity states. So we using Au-coated on aluminum alloy bipolar plate to ensure surface stabilize. Assemble 20-cells stack to measure the performance. In H2/Air stoichimotry 1.2/5.0 and humidification temperature of 60 ℃ for best performa

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Chen, Hung-yu, and 陳紘裕. "Performance Analysis of Different Fuel Supply Paths on the Planar Fuel Cell Stack." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3r3g4c.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>106<br>This study aimed at DMFC in the planar battery pack, proposed with varied fuel supply path design, modular configuration for the plane (in units of 4) design. Using MEMS process and micro-electroforming technology to produce a miniature direct methanol fuel cell flow field plate and assembled into a total reaction area of 1.92 cm2 of 4 cell plate micro direct methanol fuel cell stack. This experiment with a single cell in varied flow channel width, flow rate, temperature and concentration to find the best experimental parameters, the VI/PI curve was teste

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Natali, Karina, and 吳愛琳. "An Investigation of Stack Ventilation Performance for a Building Project in Spring Season Condition." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/96406996956542909549.

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碩士<br>國立臺灣科技大學<br>建築系<br>101<br>This study examines the stack ventilation performance of an office building located in Taipei, Taiwan. Atriums in this building act as stacks that facilitate buoyancy-driven ventilation. Computational Fluid Dynamic (CFD) simulations are used to identify interior airflow patterns, and then used these patterns to assess the building’s heat expulsion efficiency. Ambient temperatures between 20°C and 24°C were adopted as the typical seasonal spring temperature range in Taipei. Further, “zero-wind” conditions are established to ensure simulation results reflected on

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Feng, Chih-Lun, and 馮之綸. "A Novel Design/Fabrication for Micro Fuel Cell Stack Bipolar Plates and Performance Tests." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/98696644862237271226.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>94<br>The H2/air micro PEMFC stacks were designed and fabricated in-house through MEMS (Micro-Electro-Mechanical System) technology with deep UV lithography manufacturing processes (SU-8 photoresist) and micro electroforming manufacturing processes to construct a novel metallic bipolar plate. The effect of different operating parameters on micro PEMFC stacks performance was experimentally investigated for serpentine flow-field configuration. Experiments were conducted through a serious laboratory experiments with different operating conditions of temperature (25

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Cheng, Kuo-yao, and 鄭國曜. "Effects of Reformate on Performance of PBI/H3PO4 Proton Exchange Membrane Fuel Cell Stack." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/75661595700715922966.

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碩士<br>國立臺南大學<br>綠色能源科技研究所碩士班<br>101<br>In this study, the performance of a five-cell fuel cell stack performance by changing the nitrogen and carbon dioxide concentration was examined experimentally. The hydrogen concentration in the reformer gas is not the same and stable, some of them may have some poison gases which like carbon dioxide. The poison gases make the performance of fuel cells decay. For examining the performance variation, the polarization curve and EIS (electrochemical impedance spectroscopy) methods were presented in this study. The best operating temperature of fuel cell stac

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Su, Hsun-Hung, and 蘇訓弘. "Design and Development of a Self-humidifying and Preventing Performance Decay Portable HFC Stack." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/38125523605489765486.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>100<br>In this thesis, a PEMFC stack, which can be self-humidification of passive portable hydrogen fuel cell, will be developed. The stack is developed for portable applications, so the structure of the stack is simplified as possible as we can. As the cathode directly exposed under the atmosphere, so in a long time, the membrane easily lead to excessive evaporation of water, so that performance degradation. The traditional humidifier is more complex applications are not suitable for portable, so this thesis stack developed by the use of cotton capillarity, the

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Wang, Hong-Ming, and 汪鴻銘. "Effects of operating parameters and loading mode on cell performance of PEM fuel cell stack." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/73621432786699005947.

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碩士<br>華梵大學<br>機電工程學系博碩專班<br>98<br>Many single cells have to be connected in series in order to increase power. Such a collection of single cells in series is known as a stack. In this thesis, the main focus is to fabricate a stack of PEM fuel cell. The effects of operating conditions (including the stoichiometric ratio, cell temperature, inlet humidifying temperature) on stack performance of PEM fuel cell under various loading modes and dynamic loadings are also examined. A 4-cells stack is used to measure the current density and power density. The stoichiometric modes with values of 1.2/4,

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Su, Feng-chien, and 蘇烽堅. "Studies of the High Performance New-type Carbon Fiber Bipolar Plate Applied to a DMFC Stack." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/76090916752105328422.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>92<br>The experimental test and analysis of the direct methanol fuel cell (DMFC), which is made with a newly developed heterogeneous composite carbon fiber unipolar/bipolar plate, is performed in our lab. The work from the making of carbon fiber unipolar plate to the design of single-cell DMFC is also included in this study. The experimental work of various control parameters, such as methanol concentration, operating temperature, and the air flow rate, is also conducted in this thesis. The formation of carbon dioxide in anode is inspected during experiment. Fro

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Cheng, Po-Lun, and 鄭博倫. "Process development on high-k gate stack, spacer formation and SiGe growth for CMOS performance enhancement." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/58480567650914265988.

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博士<br>國立交通大學<br>機械工程系所<br>97<br>In this work, gate stack formation for high-k materials, spacer process improvement and stress enhancement process before SiGe growth are proposed. The first two processes can improve the performance of pMOSFET and nMOSPET, and the third process can improve the pMOSFET performance. In gate stack formation, one feasible process flow integrating high-k and metal gate to decrease Jg (gate leakage) and EOT (electrical oxide thickness) without further impacting mobility is proposed, where dual work function metal gate can be formed by the proposed flow. For spacer p

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Jia-FengLin and 林珈鋒. "Study on Effects of Humidification Methods in the Performance and Resistance of PEM Fuel Cell Stack." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/87578491934662858885.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>98<br>The proton exchange membrane fuel cell (PEMFC) is one of the most promising alternative energy devices. It has attracted lots of public attention due to its high energy efficiency and zero emissions. The research and development of fuel cells was also very vigorous in the past two decades. However, an improper operation condition may cause a drop of the stack performance and a decrease of the voltage uniformity of each individual cell. In order to reduce the volume of the fuel cell system and to reduce the power consumption of components, the membrane-type

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