Дисертації з теми "Small scale electronic device"
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Sukumaran, Sunija. "Design and preparation of a micro-harvesting device made of hybrid SMA/Piezoelectric polymer composite." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0140.
Small-scale energy harvesting to power self-powered electronic devices is tremendously increasing. In this regard, the ability to combine thermal and mechanical harvesting using smart materials pays more attention. We have presented the feasibility of using P(VDF-TrFE) piezoelectric polymer coupled with NiTi shape memory alloy (SMA) to harvest both mechanical and thermal energy in simple scalable devices. A novel multi-layered SMA-P(VDF-TrFE) composite was fabricated and carried out their electro-thermo-mechanical performance. We have designed and developed an experimental bench to perform the electro-thermomechanical characterization of the composite, allowing us to measure the piezoelectric response when it is subjected to periodic heating and cooling. Furthermore, we performed the finite element analysis of the SMA-Piezoelectric composite and simulated the main properties of SMA such as superelastic behavior, one-way shape memory effect, and two-way shape memory effect, to finally identify the overall effective electro-thermomechanical behavior of the SMA-piezoelectric polymer composite. Finally, in order to efficiently harvest the electric charge generated from the P(VDF-TrFE) film, we have studied and compared two types of integrated converters and determined the conditions for effective energy harvesting. These results are promising, which showing the feasibility of this multilayered composite to power small electronics such as wireless sensors, MEMS and biomedical devices in an autonomous way
Desai, Anand Hasmukh. "Thermal management of small scale electronic systems." Diss., Online access via UMI:, 2006.
Bermudez-Contreras, Alfredo S. "An energy recovery device for small-scale seawater reverse osmosis desalination." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6098.
Robbins, Curt. "Small scale renewable energy storage system using hydrogen combustion." abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1456487.
Pesola, P. (Pauli). "Smart device system to manage virtual information in small scale settings using augmented reality interfaces." Master's thesis, University of Oulu, 2014. http://urn.fi/URN:NBN:fi:oulu-201312031950.
Towle, Anna-Linnea. "Optimal Production Planning for Small-Scale Hydropower." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235266.
Tillförlitliga energikällor som vattenkraft blir allt viktigare vart eftersom elkraftsystemet utökasmed fler förnybara energikällor som vindkraft och solenergi. I Norden finns det rikligt medvattenkraft, vilket bidrar till att upprätthålla ett stabilt och pålitligt elnät även med ökadeoregelbundenheter från vindkraft och solkraft samt större variationer i efterfrågan. Bortsett frånvattenkraftens tillförlitlighetsaspekter vill kraftproducenter maximera sin vinst från såld el. ISverige läggs dagligen bud på effektvolym till spotmarknaden Nord Pool och ett slutgiltigtmarknadspris bestäms därefter av elmarknaden. Varje timme under dygnet motsvarar ett enskiltelpris, därmed är det mer lönsamt att generera effekt under de timmar där priset är som högst.Det finns många andra faktorer som påverkar när det är mest lönsamt för ett vattenkraftverk attproducera el, exempelvis hur stort det lokala inflödet av vatten är. Vattenkraftproduktion är idealtför tillämpning av optimeringsmodeller, vilka är vanligt förekommande inom verksamhetsområdet.Även om optimeringsberäkningarna utförs av en dator innebär optimeringen mycket manuelltarbete för Fortums elhandlare som specificerar indata till modellen. Exempel på indata är lokaltinflöde, prisprognoser och kanske viktigast av allt marknadsstrategi. På grund av den storamängden arbete som fordras för varje vattenkraftverk, optimeras inte produktionen för många avde småskaliga kraftverken utan de regleras automatiskt med mål att upprätthålla en konstantvattennivå. Denna typ av reglering kallas vattennivåreglering, VNR.Syftet med examensarbetet var att utveckla en optimeringsalgoritm för ett småskaligtvattenkraftverk, där Fortumägda vattenkraftverket Båthusströmmen används som testobjekt. Enoptimeringsmodell utvecklades i Fortums befintliga system och testades för 2016. Dessutom haren matematisk modell utvecklats och testades med GAMS. Det konstaterades att genom attoptimera produktionen från vattenkraftverket istället för att reglera den via VNR kan envinstökning med cirka 15-16 % för noteras år 2016. Detta är en väsentlig förbättring och är ettstarkt argument för att optimera produktionen från småskaliga vattenkraftverk.Eftersom den främsta orsaken till att många småskaliga vattenkraftverk inte optimeras är denutökade arbetsbelastningen det skulle innebära för de anställda, genomfördes en andra fas iexamensarbetet i samverkan med två andra studenter, Jenny Möller och Johan Wiklund. Fokus fördenna del var att utveckla en centraliserad styrenhet för att automatiskt optimera produktionsplaneroch kommunicera med det befintliga centrala systemet. Detta innebär att utökad arbetsbelastningenfrån elhandlarna undviks, samt öka vattenkraftverkets totala vinst. Denna rapport beskriverresultaten från både Fortum-modellen och GAMS-modellen, liksom den matematiskaformuleringen av GAMS-modellen. Även grundstrukturen för det självreglerandeoptimeringsverktyget presenteras, mer kan läsas i rapporten av Möller och Wiklund (Möller &Wiklund, 2018).Nyckelord: Optimering, vattenkraftplanering, självreglerande, automatisk styrning, optimalplanering
Shaughnessy, Gwendolyn A. "Surface and small-scale processes of biogeochemical cycling of organic matter in tidal sediments /." Electronic version (PDF), 2007. http://dl.uncw.edu/etd/2007-3/shaughnessyg/gwendolynshaughnessy.pdf.
Azlak, Nursamirah. "Testing of a laboratory-scale automated blending device for Fit-For-Purpose water supply from a small scale reverse osmosis system for farms." Thesis, Azlak, Nursamirah (2018) Testing of a laboratory-scale automated blending device for Fit-For-Purpose water supply from a small scale reverse osmosis system for farms. Honours thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/44786/.
Hasbum, Casanova Moises. "Experimental investigation and analysis of a distributed MPPT system for a small-scale photovoltaic installation." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235193.
Det här examensarbetet behandlar frågan om att integrera distribuerade MPPT-lösningar med redan existerande solcellssystem. Kraftelektroniska kom- ponenter och metoder används för att optimera effektutmatningen från solcel- ler. Ett antal olika utformningar används där en DC/DC omvandlare utför optimeringen av en eller flera solcellssträngar. När solceller är seriekopplade går samma ström genom samtliga paneler. Vid skuggning eller felmatchning leder detta till att inte bara den individuella panelen utan samtliga paneler i en sträng kommer att drivas under icke-optimala förhållanden. Att installera optimerare kan visa sig vara ett sätt att avhjälpa förluster i effektutmatningen som uppstår på grund av felmatchning, skuggning och trasiga paneler. Huvudmålet i det här examensarbetet var att utvärdera prestandan hos en solcellsanläggning genom att använda en kombination av solcellsoptimerare avsedda för hela solcellssträngar och solcellsoptimerare avsedda för individuella paneler. Som metod genomfördes praktiska fältförsök varvid kraftutmatningen mättes hos en redan existerande solcellsanläggning med solcellsoptimerare. Två strängar användes vid dessa undersökningar, en kontrollsträng med endast en strängoptimerare och en experimentsträng där individuella strängoptimerare användes. Testerna utfördes under olika skuggningsförhållanden. Resultaten visar på att ene med 1-3% genom att använda sol-cellsoptimerare.
Correll, Eric Owen. "Design of a rapid, continuous, small-scale device for creating dry powders from concentrated suspensions containing active pharmaceutical ingredients." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/68832.
"February 2011." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 14).
Current methods of producing pharmaceutical compounds are large batch processes. The minimum time-to-patient for drug manufacturing is approximately 100 days. Using a continuous manufacturing process, the time-to-patient could be reduced to less than ten days. The scope of this paper encompasses the design of a machine for the desiccation of a mixture of solvent and pharmaceutical compound. The goal of this project was to provide a small-scale, high throughput method of continuous pharmaceutical drug drying for Novartis-MIT Center for Continuous Manufacturing. Specifications included a product flow rate of 100 grams per hour and a final product form of flowable powder. Several machines were built and tested, with the final design being comprised of a convective drum dryer and a modular continuous vacuum dryer.
by Eric Owen Correll.
S.B.
Saadou, Yaye Abdoulaye. "Quality of Experience for the Operation of a Small Scale Ground Vehicle over Unreliable Wireless Links." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1439489876.
Constantinescu, Gabriel Cristian. "Large-scale density functional theory study of van-der-Waals heterostructures." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274876.
Park, Juhong. "Fabrication of Large-Scale and Thickness-Modulated Two-Dimensional Transition Metal Dichalcogenides [2D TMDs] Nanolayers." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505271/.
Al, Jassism Wael Hassan. "An investigation of the strategic decision making process in SME's." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/9172.
Möller, Jenny, and Johan Wiklund. "Optimeringsverktyg för automatisk planering och reglering av produktion i småskaliga vattenkraftverk." Thesis, KTH, Hälsoinformatik och logistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230232.
Small-scale hydropower plants are usually controlled considering either the reservoir level or the water flow, regardless of the electricity demand. This thesis was conducted on behalf of Fortum Generation that wanted to investigate the possibility to automatically optimise the production plans and control of small-scale hydropower plants based on electricity price, generator efficiency, water situation, environmental restrictions, environmental concerns, and mechanical wear. The thesis is a continuation of a study where an optimisation algorithm was developed. A prototype that could automatically plan the production and control of an individual hydropower plant would be developed, and then based on simulations it would be determined if an implementation of the algorithm in an optimisation tool is possible and profitable. Båthusströmmen, the test case for this thesis, is owned by Fortum and is a small-scale hydropower plant in Österdalälven. A cost-effective prototype of an optimisation tool for automated planning and control was developed and tested through simulations. The prototype was developed as a software that performs the optimisation and communicates continuously with the existing optimisation, supervisory and control system. The results of the communication tests and optimisation simulations showed that an implementation of the algorithm in an optimisation tool is possible and is expected to increase the efficiency of Båthusströmmen and therefore increase the profit of the power plant.
Andrews, Sydney George. "A small-scale investigation of the group administration of Feuerstein's learning potential assessment device." Thesis, 1996. http://hdl.handle.net/10413/5857.
Thesis (M.Ed.)-University of Natal, Pietermaritzburg, 1996.
Fang, YuChang, and 方鈺璋. "A Case Study About Electronic Business of Small and Medium-Scale Enterprises of Taiwan." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/80348675471303010196.
國立臺灣大學
商學研究所
89
Small and medium-scale enterprises in Taiwan always played very important roles during the economical development . When Taiwan was faced with difficult challenges , they showed good flexibility at the right moment . According to information provided by Institute for Information Industry , however , the electronic maturity of industries in Taiwan was lowest among four Asian countries — Singapore , Hong Kong , South Korea and Taiwan . Although we can’t understand what benefits e-business could bring , one thing that we’re sure is enterprises will be eliminated through competition if they don’t transfer e-business . For this reason , small and medium-scale enterprises of Taiwan should transfer e-business positively to cope with keen international competition . E-business has been a inevitable trend . This research adopted deep interviews on Honmyue Enterprise Co., Ltd. , Cybergate Corporation , Long Da Construction Co., Ltd. ,Ho Feng Industry Co., Ltd. and Whale Industry Co., Ltd. . The research also used qualitative analysis to discuss e-business’s motivation , its implement , its benefits , its barriers and some other issues of the government’s role during the process which small and medium-scale enterprises of Taiwan transferred e-business and success factors of e-business . Concerning the motivation of e-business , this research found that motivations and needs have many differences among different industries and enterprises , but two events that Taiwan will enter into World Trade Organization and China has more and more powerful science and technology have made small and medium-scale enterprises transfer e-business positively . Concerning the implement of e-business , this research found that five interviewed corporations all implemented in proper sequence and from up to down . Concerning the benefits of e-business , this research found that improvement of efficiency is the common point of this research and literatures . In addition , improvement of enterprise image is an unexpected benefit by interviewed corporations and never mentioned in the literatures . Concerning the barriers of e-business , this research found that the resistance from employees is the most serious . Concerning the government’s role , this research found that five interviewed corporations all indicate negative evaluations , including careless guidance and passive attitude . Concerning the success factors of e-business , this research found that determination of the boss is the most important , and this result conforms with literatures . According to the above-mentioned results , this research established twenty-one propositions to be the basis for future follow-up studies .
Pirquet, Oliver Johann. "Aero-elastic Energy Harvesting Device: Design and Analysis." Thesis, 2015. http://hdl.handle.net/1828/6740.
Graduate
0548
0544
opirquet@uvic.ca
Göktaş, Oktay [Verfasser]. "Small alloyed ohmic contacts to 2DES and submicron scale corbino devices in strong magnetic fields : observation of a zero bias anomaly and single electron charging / vorgelegt von Oktay Göktaş." 2009. http://d-nb.info/995852804/34.
Patterson, Heather Michelle. "Small-scale distributions and dynamics of the mysid prey of gray whales (Eschrictius robustus) in Clayoquot Sound, British Columbia, Canada [electronic resource]." 2004. http://hdl.handle.net/1828/748.
Chen, Jia-Yuan, and 陳嘉元. "The Influence of Integrating Electronic Textbooks into Chinese Teaching on Students’ Learning Achievements: a Case of Small-Scale Elementary School Third-Graders." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/s36x6y.
樹德科技大學
資訊工程系碩士班
106
The purpose of this study is to investigate the impact of electronic textbooks on the achievement of Chinese learning for elementary school third-grade students. A quasi-experimental time sequential design is adopted in this research. The subjects of the experiment are 12 small-scale elementary school third-grade students, taught by the researcher. The traditional and experimental teachings are conducted for 8 weeks 64 classes, repectively. The experimental results are statistically analyzed. The use of traditional paper and pen teaching and experimental teaching of electronic textbooks will last for 8 weeks and 64 lessons in total. Before and after the teaching experiment, the evaluation scores are taken as the pretest and posttest results respectively. After the teaching experiment, the students are asked to fill in the questionnaire. According to the analysis of the pretest, the posttest, and questionnaire results, the research conclusions are as follows: 1. Using electronic textbooks to assist teaching in elementary school has a positive impact on students’ Chinese learning achievements. 2. The use of electronic textbooks can help students improve their Chinese learning motivation. 3. After using electronic textbooks, the elementary school third-grade students’ satisfaction about Chinese learning is improved. The questionnaire results show that students highly recognize that the integration of electronic textbooks into Chinese teaching can improve learning achievements and motuvation. And after learning, they are more confident and interested. This study provides specific suggestions for the reference of future Chinese teaching and related research.
Liao, Fang-Yu, and 廖芳榆. "The Influence of Integrating Electronic Textbooks into English Teaching on Students’ Learning Achievements and Motivation: a Case of Small-Scale Elementary School Second-Graders." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/82qq49.
樹德科技大學
資訊工程系碩士班
106
The purpose of this study is to explore the impact of the integrating electronic textbooks into English teaching on Elementary school students’ learning achievements and motivation. To understand how the students’ learning is changed by using electronic textbooks in English classes, a quasi-experimental time sequential design is adopted. The subjects of the experiment are 10 second grade students, 7 boys and 3 girls, taught by the researcher, conducting a six-week experiment. The teaching materials used are the 3rd to 5th lessons of Kang Xuan''s Super Starter Book 1. The research process is based on quantitative data analysis. Before and after the teaching experiment, the first and second periodic evaluation scores are taken as the pretest and posttest results respectively. After the teaching experiment, the students are asked to fill in the "Electronic Textbook Integrating into English Teaching Questionnaire". The results are statistically analyzed using SPSS. In addition, this study is supplemented by qualitative data. The Student Interview Outline is recorded as a reference for researchers to modify the instructional design. The research results are as follows: 1.The use of electronic textbooks integrating into English teaching can help students improve their English learning achievements. 2.The use of electronic textbooks integrating into English teaching can help students improve their English learning motivation. 3.Students are positive about the use of electronic textbooks integrating into English teaching.
Simwaka, Kisukyabo. "The economic impact of adult mortality and morbidity on smallholder farm households in Malawi [electronic resource]." Thesis, 2011. http://hdl.handle.net/10413/10438.
Thesis (Ph.D.)-University of KwaZulu-Natal, Westville, 2011.
(7046639), Feng Zhang. "Transition Metal Dichalcogenide Based Memory Devices and Transistors." Thesis, 2019.