Дисертації з теми "TRACKING OF EFFICIENCY"
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Lee, Byung K. "Tracking of truck flows for drayage efficiency analysis." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1603103.
Повний текст джерелаInefficient port drayage causes high costs in addition to congestion and pollution. To identify the causes of inefficiency in port drayage, we developed a mobile application, which utilizes a Global Point System (GPS), Bluetooth and some driver inputs to track the manner in which the drays move, such as picking up a loaded container or delivering an empty one. A web application is used to receive data from the mobile devices, interprets the data to determine whether or not the data points are in or out of range of port terminals, stores the data in a database and provides visualization of point locations on Google Maps. The collected data are then analyzed in order to pinpoint any trouble areas, find the cause, and recommend solutions where appropriate. In this work, we describe the software development process in both the mobile and the web applications and report results of our analysis based on the collected data.
Aleman, Adriana. "Efficiency of Internal Capital Markets: Evidence from Tracking Stocks." Honors in the Major Thesis, University of Central Florida, 2003. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/408.
Повний текст джерелаBachelors
Arts and Sciences
Finance
Morfeldt, Johannes. "Tracking Emissions Reductions and Energy Efficiency in the Steel Industry." Doctoral thesis, KTH, Energi och klimatstudier, ECS, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-205882.
Повний текст джерелаJärn- och stålindustrin har blivit alltmer globaliserad. Marknadsvillkoren förändras samtidigt som utfasningen av fossila bränslen är utmanande. Målet med den här avhandlingen är att bedöma hur energieffektivitet och växthusgasutsläppsminskningar kan främjas och effektivt utvärderas inom stålindustrin. Avhandlingen bidrar med analyser baserade Malmquists produktivitetsindex för att analysera energieffektivitet av EU:s medlemsstaters järn- och stålproduktion, och partiell minsta- kvadrat-regression för att bedöma olika utvärderingsmått. Avhandlingen bidrar även med en modul som bedömer skrottillgång för att förbättra energisystemmodellen ETSAP-TIAM. I en första fas visade forskningen att framtida produktion behöver ställas om mot innovativa teknologier med låga CO2-utsläpp även när allt tillgängligt återvunnet material används fullt ut. Tekniker som använder koldioxidinfångning och -lagring (CCS) samt vätebaserade teknologier kan förväntas bli ekonomiskt försvarbara under åtstramade klimatpolitiska styrmedel. I en andra fas visade forskningen att nuvarande indikatorer är otillräckliga. Systemgränser för energianvändnings- och växthusgasutsläppsdata stämmer inte överens med produktionsstatistik. Indikatorer utifrån energianvändning eller utsläpp i relation till fysisk produktion kan vara användbara för att följa upp specifika processer. Nuvarande indikatorer lyckas dock inte spegla företagens produktmix. Förbättrade energi- och klimatindikatorer som justerar för produktmixen ger bättre uppskattningar, men speglar inte branschens ökande globalisering. Effektiv utvärdering av industriell transformation blir alltmer viktig då påtryckning från klimatpolitiska styrmedel via global CO2-prissättning är kortsiktigt osannolik. Nuvarande eller förbättrade indikatorer fångar inte industriell transformation fullt ut och rekommenderas inte. Framtida forskning bör fokusera på att definiera indikatorer som uppskattar energianvändning och växthusgasutsläpp längs industriella värdekedjor.
QC 20170428
Richard, Gaetan C. "A NEW HIGH EFFICIENCY, AGILE BEAM SCANNING, BROADBAND TRACKING ANTENNA FEED." International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/608863.
Повний текст джерелаTwo different types of tracking feeds are currently used in the majority of telemetry tracking antenna systems when autotrack operation is required. They are of the conical scanner or of the single channel monopulse family and they employ well known technologies. In broadband applications, these feeds all suffer from the same inherent degradation in efficiency caused by their inability to maintain a constant crossover loss value and by their failure to properly illuminate the reflector. In high dynamics situations they can also generate unwanted and sometimes detrimental modulation whenever on-axis tracking is not maintained. In addition, currently available versions of the conical scanner are not capable of high scan rates or of scan rate agility and they are ill-suited for use in tracking systems based on non-orthogonal axes positioners. This paper describes a new high efficiency tracking feed system based on proven conical scanner technology. Its design incorporates features such as variable crossover, steerable beam, high scan rates, scan rate agility as well as stable reference coordinate system. In addition to these features, this new feed is also capable of delivering, in all but one operational category, levels of performance superior to that achievable to date by any other implementation of the conical scanner or of the single channel monopulse technology.
A, Mokhti Zulhazmi Bin. "Development of a high-efficiency power amplifier for envelope tracking applications." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/98635/.
Повний текст джерелаMahon, John P. "THE S-BAND COAXIAL WAVEGUIDE TRACKING FEED FOR ARIA." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/607612.
Повний текст джерелаThis paper contains a description of a new technology tracking feed and a discussion of the features which make this feed unique and allow it to perform better than any other comparable feed. Also included in this report are measured primary antenna patterns, measured and estimated phase tracking performance and estimated aperture efficiency. The latter two items were calculated by integrating the measured primary patterns.
Kauffman, Kyle J. "Fast target tracking technique for synthetic aperture radars." Oxford, Ohio : Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1250263416.
Повний текст джерелаKrishnamurthy, Balasubramanya. "A comparison of the relative efficiency of tracking signals in forecast control." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4942.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains ix, 94 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-94).
Alqarni, Mohammed. "A high efficiency photovoltaic inverter system configuration with maximum power point tracking." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12767.
Повний текст джерелаSood, Sumit. "Multiphysics modelling for online diagnosis and efficiency tracking : application to green H2 production." Thesis, Université de Lille (2018-2021), 2021. https://pepite-depot.univ-lille.fr/LIBRE/EDMADIS/2021/2021LILUB028.pdf.
Повний текст джерелаRenewable Energy Sources (RES) have emerged as a sustainable alternative to carbon-based energy sources as the world is struggling in limiting the greenhouse effect in the coming years. The use of RES, such as solar and wind, alone is non-reliable due to their intermittent nature. The surplus electricity generated during off-peak hours must be stored to tackle the problem of the unavailability of energy. Green Hydrogen (GH$_2$) generation using electrolyser running on RES has seen an increase in recent years for the storage of this surplus energy due to its advantages over conventional methods (such as batteries and ultra-capacitors) for long term storage and transport. Proton Exchange Membrane (PEM) based electrolysers are better suited for the coupling with RES as compared to the alkaline electrolysers due to their faster start-up times and fast dynamic load changing capability. The intermittent nature of RES affects the performance and operation dynamics of the PEM electrolyser and must be analysed and studied in order to make these systems more reliable and safer to use. Mathematical modelling is one of the possible solutions for studying their behavior and developing supervision algorithms.Under the framework of the E2C project of the European Interreg 2-Seas program, a generic dynamic multi-physics model of a PEM electrolyser has been proposed in this work based on Bond Graph (BG) approach. Various components of the PEM electrolyser have been modelled in the form of BG capsules. These capsules can be connected based on the piping and instrumentation diagram of the PEM electrolyser system to have a global model of the system. The developed model is capable of representing different configurations of PEM electrolysers ranging from laboratory scale to industrial scale. The model is also capable of facilitating efficiency tracking in real-time. The developed model in the BG form has been converted into MATLAB® Simulink block diagram from the implementation point of view.The model was then validated using a single cell PEM electrolyser powered by a Hybrid Multi-source Platform (HMP) running on solar and wind energy at the University of Lille. The proposed model was also extended for the modelling and performance study of Anion Exchange Membrane (AEM) electrolysis cell, in collaboration with the University of Exeter of England, which shares a similar configuration and architecture.The developed model for the PEM electrolysis system is also suitable for the development of control, diagnosis, and prognosis algorithms. Therefore, a model-based robust fault diagnosis for PEM water electrolyser has been proposed in this work. The proposed diagnosis algorithms and model have been then utilized for developing the graphical user interface for online supervision
Gedamke, Todd. "Estimating Commercial Scallop Dredge Efficiency through Vessel Tracking, Catch Data, and Depletion Models." W&M ScholarWorks, 2002. https://scholarworks.wm.edu/etd/1539617795.
Повний текст джерелаJAVAN, KHOSHKHOLGH AMIR. "Analysis and Design of Envelope Tracking Power Amplifier." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2592754.
Повний текст джерелаNghe, Brandon K. "Cascaded Linear Regulator with Positive Voltage Tracking Switching Regulator." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2173.
Повний текст джерелаRedgate, John. "Dynamic tracking of a cage induction motor operating at maximum efficiency in an electric vehicle." Thesis, Nottingham Trent University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436676.
Повний текст джерелаWang, Feipeng. "High efficiency linear envelope tracking and envelope elimination and restoration power amplifier for WLAN OFDM applications." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3238429.
Повний текст джерелаTitle from first page of PDF file (viewed January 4, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 126-131).
Almgren, Björn. "Dynamic load modulation." Thesis, University of Gävle, Department of Technology and Built Environment, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-702.
Повний текст джерелаThe purpose of this master thesis was to study if the drain efficiency of power amplifiers can be maintained at power back off using a technique called load modulation.
The amplifier classes studied are E, F and D-1. The target figure was to obtain a 10 to 12 dB dynamic range of amplitude with reasonable efficiency. Studies of power amplifiers have been made to understand how power is generated. Several different load modulation networks have been evaluated. Attempts to derive design equations for the modulation networks have also been done.
The thesis work was carried out with simulations in ADS 2006. As active devices commercially available bare-die transistor models have been used. The power rating of the dies are 15 W.
A dynamic range of amplitude of over 15 dB has been achieved with drain efficiency greater than 60 percent. The peak output power is in the 40 – 45 dBm range.
Daswa, Khumbudzo Ashley. "Perfomance evaluation of the tracking ability and pricing efficiency of Exchange Traded Funds (ETFS) in South Africa." University of the Western cape, 2016. http://hdl.handle.net/11394/5562.
Повний текст джерелаSince the listing of the Satrix 40 in November 2000, Exchange Traded Fund (ETFs) have grown to become an investment vehicle of choice amongst retail and institutional investors of the Johannesburg Securities Exchange (JSE). Albeit gaining such an enormous traction, investors' remains curious about ETFs ability to successfully replicate the movements of their target benchmark indices and also their capability to yield arbitrage profit opportunity through mispricing. In addition to that, investors are also interested to know whether ETFs as an index tracking investment vehicle are resilient in variously cycles of the economy. Motivated by this gap in the body of knowledge, this research undertakes to evaluate the tracking ability and pricing efficiency of 19 ETFs listed on the JSE over various cycles of the economy. According to Faulkner, Loewald and Makrelov (2013) South African economy experienced the effect of the 2008 global financial crisis between 1 September 2008 and 30 June 2009. For that reason, the examination period of this research is segmented into four main categories namely: full examination period which spans from the launch date of each of the ETF under review until 30 September 2015, pre-crisis period that is between the launch date and 29August 2008, crisis-period dated 1 September 2008 and 30 June 2009 and the post-crisis or the recovery phase being 1 July 2009 through 30 September 2015. The tracking ability results across all the sub-periods suggested that, on average, ETFs yields daily returns which closely resemble that of their target benchmark indices but with relatively high level of volatility. With regard to the tracking error as another tracking ability measurement, it was discovered that the ETFs under review were inadequately replicating the movements of their target benchmark indices irrespective of the economic cycle. In tandem with the evidence documented by Mateus and Rahmani (2014) from the London Stock Exchange (LSE), tracking errors were substantially high during the 2008 global financial crisis as opposed to the prior and the post crisis period. Across all the examination periods, sizeable amount of tracking error was found to be associated to the ETFs which mimics the international broad-market access underlying indices. Amongst other things, the diversity of these indices as well as the trading hours overlap between the JSE and their host market were found to be the key attributing factors. On the contrary, ETFs which replicates most liquid target benchmark indices such as the FTSE/JSE Top 40 index appeared to have lower tracking error on relative basis. In this regard, the liquidity of the FTSE/JSE Top 40 index proved to be the main attribute. Apart from the diversity or the liquidity of indices, the length of the examination period also had a significant influence towards the magnitude of tracking errors. In this instance, shorter examination period were found to be characterised by noise or volatility in the market which makes it difficult for the ETFs providers to promptly rebalance their portfolios and align them to their target benchmark indices. Over and above these factors, this research discovered that tracking errors across all the sub-periods were largely driven by management fees and daily volatility of the ETFs market prices, more especially during the crisis period. On the one hand, trading volume and the effect of dividends distribution had a negative influence towards the magnitude of tracking errors. On the question of how efficient these 19 ETFs are, the empirical findings revealed that significant deviation between the ETFs closing price and the Net Asset Value (NAV) does exist either being a discount or premium. In line with the prior work on the JSE by Charteris (2013), ETFs which mimics local based indices were found to be trading mostly on a discount to the NAV whilst the opposite was true in the case of the international broad-market access ETFs. At the same token, international broad-market access ETFs portrayed sizeable amount of premiums across all the cycles of the economy. In line with the analysis of tracking errors, such enormous premiums were mainly driven by lack of synchronicity in the trading hours between the JSE and host market wherein these ETFs target benchmark indices are listed. Empirical literature suggests that ETFs that exhibit discount and premium which fails to persist for more than one trading day are deemed to be efficiently priced since there is limited opportunity to arbitrage. On that note, this research found that mispricing of ETFs which mimics most liquid indices such as the domestic broad-market access and sectorial indices disappears within a period of one trading day. For that reason, majority of these ETFs were considered to be efficiently priced against their NAV. Contrarily, discounts and premiums exhibited by ETFs which mostly replicate style based and the international broad-market access indices appeared to be persistent even to the fifth trading day. From the attribution point of view, the complexity of these ETFs underlying indices as well as the trading hours overlap between the JSE and the host market of these indices were found to be the main drivers of such level of mispricing. In addition to that, attribution analysis through linear regression proved that transaction cost (bid-ask spread), daily volatility of the ETFs market prices as well as the impact of trading volume had a positive influence towards the existence of discounts and premiums observed across all sub-periods.
Choi, Sung In. "Smart Localized Heating Control System With Human Movement Tracking." Master's thesis, Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/407171.
Повний текст джерелаM.S.E.E.
According to the U.S. energy consumption survey in 2012, about 25% of the commercial and 42% of the residential building energy were used for heating. Despite the development of new and more efficient Heating, Ventilation, and Air Conditioning (HVAC) systems over the years, the high energy consumption in heating is still one of the major energy efficiency issues. Studies showed that decreasing HVAC operating temperature set points by 4°F will result in energy savings of 15% or more. Thus, the smart localized heating control (SLHC) system was designed and prototyped to provide localized heat directly to a person so that HVAC can run at a lower temperature set point. SLHC detects human movement and delivers the heat based on the result of the target location estimation and temperature measurement feedback. To detect the human movement, image processing techniques were used; image segmentation, mass center detection, background subtraction using the Mixture of Gaussian model, and human feature detection. In SLHC, a near-infrared heater and a tracking function were used to provide an instant and a direct heat to the person in order to minimize wasting energy. The SLHC system is divided into the sensing and processing (SP) and the heating and regulating (HR) subsystem. The SP’s primary function is to process captured video images and measured temperature data. SP also generates and sends the heater operating signal to HR. HR purposes to control the heater’s direction and power based on the signal. The communication between SP and HR was established through Wi-Fi enabled development platform. The SLHC prototype successfully processed the sensing data and transmitted the control signal. The result shows that it detected human movement and estimated the person’s location in 3D space within 10% margin of error. Also, it delivered the focused heat to the surface of the human body and increased the temperature by 10.0°F in 3 minutes at the distance of 1.5m away from the heater. This cost-effective, wireless, and localized heating system demonstrates the potential to improve energy efficiency in buildings.
Temple University--Theses
Jiang, Bo. "Energy Efficient Target Tracking in Wireless Sensor Networks: Sleep Scheduling, Particle Filtering, and Constrained Flooding." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/29963.
Повний текст джерелаPh. D.
Akhtar, Kareem. "A Numerical Study of Supersonic Rectangular Jet Impingement and Applications to Cold Spray Technology." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/71711.
Повний текст джерелаPh. D.
Haelssig, Jan B. "Improving the Energy Efficiency of Ethanol Separation through Process Synthesis and Simulation." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20100.
Повний текст джерелаJoerger, Guillaume. "Multiscale modeling and event tracking wireless technologies to improve efficiency and safety of the surgical flow in an OR suite." Thesis, La Rochelle, 2017. http://www.theses.fr/2017LAROS009/document.
Повний текст джерелаImproving operating room management is a constant issue for modern large hospital systems who have to deal with the reality of day to day clinical activity. As opposed to other industrial sectors such as air civil aviation that have mastered the topic of industry organization and safety, progress in surgical flow management has been slower. The goal of the work presented here is to develop and implement technologies that leverage the principles of computational science to the application of OR suite problems. Most of the currently available models of surgical flow are used for planning purposes and are essentially stochastic processes due to uncertainties in the available data. We propose an agent-based model framework that can incorporate all the elements, from communication skills of the staff to the time it takes for the janitorial team to go clean an OR. We believe that human factor is at the center of the difficulty of OR suite management and should be incorporated in the model. In parallel, we use a numerical model of airflow at the OR suite level to monitor and simulate environment conditions inside the OR. We hypothesize that the following three key ingredients will provide the level of accuracy needed to improve OR management : 1) Real time updates of the model with ad hoc sensors of tasks/stages 2) Construction of a multi-scale model that links all key elements of the complex surgical infrastructure 3) Careful analysis of patient population factors, staff behavior, and environment conditions. We have developed a robust and non-obtrusive automatic event tracking system to make our model realistic to clinical conditions. Not only we track traffic through the door and the air quality inside the OR, we can also detect standard events in the surgical process. We propose a computational fluid dynamics model of a part of an OR suite to track dispersion of toxic surgical smoke and build in parallel a multidomain model of potential nosocomial contaminant particles flow in an OR suite. Combining the three models will raise the awareness of the OR suite by bringing to the surgical staff a cyber-physical system capable of prediction of rare events in the workflow and the safety conditions
Valenta, Artūras. "Vartotojo sąsajos efektyvumo įvertinimų tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130826_110233-41131.
Повний текст джерелаIn this research we are going to analyze most popular user interface research methods and evaluate them in different aspects and determinate their use of cases. In addition, create experimental space for one of the user interface methods research. Analyze results and compare with similar method. Lastly, we will look for solutions to increase its accuracy. 15 user interface research methods were evaluated in analyze stage. From gathered knowledge about user interface research methods and evaluation parameters, experiment was performed. His purpose was to evaluate mouse tracking accuracy as user interface method and compare it with eye tracking method. After causes for its accuracy were found, they were removed and repeated the experiment. After conducting the experiment we found out that the main factor in mouse tracking accuracy is user's inability to move mouse actively. After asking experiment participants to sync their eyes movement with mouse movements we witnessed 47% - 77% accuracy comparing with eye tracking method.
Pirro, Matteo. "Embedded Control Systems for Performances Improvement and Energy Efficiency of Electrical Drives and Power Converters." Doctoral thesis, Università Politecnica delle Marche, 2015. http://hdl.handle.net/11566/243081.
Повний текст джерелаThe global demand for electrical energy is growing continuously, at double the growth rate of primary energy consumption. Efficient energy use, sometimes simply called energy efficiency, is the goal to reduce the amount of energy required to provide products and services. A clear transition to more electric energy systems is mandatory as energy efficiency from primary fuel to the enduser and the integration of renewables are the future key challenges. Power electronics will play a key role in this paradigm shift to more renewable electrical energy and higher energy efficiency in multiple applications. In electrical energy generation a major shift to renewables as sources of future electrical energy will happen. In the field of Power Electronics four topics must be taken into account talking about energy efficiency: electrical motors, power converters, LED lighting and HVDC. In this thesis a detailed discussion on the modelling of the most known power converters has been made and some more accurate models have been proposed to better represent the behaviour of particular topologies or working modes. Passivity-Based controllers for power factor control have been proposed and argued; they resulted particularly suited in the motor control and in the LED lighting applicative fields. A global tracking passivity–based PI controller for bilinear systems has been proposed: an example application has been presented in the field of HVDC control. Furthermore, a sliding-mode robust to load variations controller for output voltage regulation in DC--DC converters has been presented. Finally inductor current observers for the boost topology has been illustrated with the aim of making superfluous the use of expensive sensors in this topology. Each proposed algorithm has been numerically tested and many of them has been experimentally verified on embedded platforms and their performances evaluated. Experimental tests have been done in the Laboratory of Advanced Robotics of DII at Università Politecnica delle Marche, Ancona, in the Laboratory of Energy Department at Supélec, Paris and in the Laboratoire de Signaux et Systémes at Supélec, Paris.
Brandon, Mathilde. "Optimisation conjointe de méthodes de linéarisation de l'émetteur pour des modulations multi-porteuses." Phd thesis, Université de Cergy Pontoise, 2012. http://tel.archives-ouvertes.fr/tel-00762747.
Повний текст джерелаHassan, Aakash. "Improving the efficiency, power quality, and cost-effectiveness of solar PV systems using intelligent techniques." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2023. https://ro.ecu.edu.au/theses/2676.
Повний текст джерелаCardoso, Pedro Miguel Martins. "Exchange-traded funds as an alternative investment option : evidence from the portuguese fund industry." Master's thesis, Instituto Superior de Economia e Gestão, 2017. http://hdl.handle.net/10400.5/14324.
Повний текст джерелаUma análise comparativa da rentabilidade através de estatística descritiva, regressões e capacidade replicação do benchmark foi realizada para Exchange-traded Funds (ETFs), fundos de investimento de índices e de ações e o respetivo benchmark (PSI 20) para o período compreendido entre 2010 e 2015 para a indústria portuguesa de fundos de investimento. Para um horizonte temporal mais alargado (2010 - 2017), foi analisada a existência de diferenças (e a sua persistência) entre o preço do ETFs e o seu respetivo valor de unidade de participação (VUP). Concluiu-se que o ETF analisado não apresenta sempre uma melhor rentabilidade relativa (diferença entre a rentabilidade do fundo e do benchmark) por comparação com fundos de investimento de índice. Não obstante, o ETF exibe uma maior capacidade não só de replicar o benchmark quando este varia negativamente, como também de diminuir a volatilidade das diferenças entre a sua rentabilidade e a do benchmark. Ainda relativamente ao ETF, verifica-se que o mesmo se encontra, em termos médios, a negociar a um valor baixo de desconto (0,00007 €), existindo evidência de persistência destes desvios para pelos menos dois dias de negociação.
A comparative descriptive statistics, regression and index tracking return investigation between Exchange-traded Funds (ETFs), Index and Equity mutual funds and their respective benchmark during the 2010-2015 period is conducted for the Portuguese fund industry. For a larger interval (2010 - 2017), ETFs are tested for price inefficiency (existence of deviations between prices and the Net Asset Value) and its persistence. It is found that ETF do not always outperform index funds in replicating the variations of the PSI 20 index, despite exhibiting better tracking ability when facing downside deviations of the benchmark and a better capacity of smoothing tracking deviations. Regarding ETFs price efficiency and its persistence, the study reveals that the analyzed ETF is priced at a low average discount of €0.00007 with evidence of deviations persistence of at least two days.
info:eu-repo/semantics/publishedVersion
Ramírez, Eduardo Díaz. "A MORE EFFICIENT TRACKING SYSTEM FOR THE SANTIAGO SATELLITE TRACKING STATION." International Foundation for Telemetering, 2007. http://hdl.handle.net/10150/604559.
Повний текст джерелаA digital antenna control system has been designed and installed on a pedestal that was formerly used to drive a VHF array and that has now been replaced with an 11 meter S-Band parabolic reflector. In this Paper, the former analog tracking system will be described, showing all the drawbacks that made it unusable for S-Band. Subsequently, the development and implementation of the digital S-Band tracking system, using Labview, C++ & digital control theory will be discussed. Finally, there will be a comparison between the digital and analog system, too.
Ramos, Lucas Feksa. "Metodologia detalhada para rastreadores solares automatizados de dois eixos em sistemas fotovoltaicos." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/8593.
Повний текст джерелаThe search for diversity of energy sources in the world is one of the challenges that are driving research to fill this demand with alternative energy sources. So we have the need to explore alternative and renewable resources that bring flexibility and sustainability in its use. Presented before the panorama, the generation of electricity with solar photovoltaic systems is a trend, and has its technology constantly advancing, presenting itself as an immediate solution to this pursuit of diversity. The energy extracted from the Sun in photovoltaic generation systems depends on the flow of energy from the solar radiation in a plane perpendicular to the rays. Therefore, the average solar energy obtained by conventional solar panels during the course of the day, is not always maximized. One reason is that the fixed panels are not at an angle of zero degree zenith in relation to the Sun position. Thus, the movement East (E) to the West (W) daily, with the Earth's seasonal, directly affects the radiation intensity received by the photovoltaic panels. In this context, solar trackers can be used as devices that improve substantially the efficiency of photovoltaic panels, by letting them always perpendicular to the incident radiation received from the sun. In this dissertation demonstrates a methodology for automated solar tracking two axes for photovoltaic panels. The qualitative and quantitative results presented here show the real gain in power generation through the development of a real-time control algorithm for solar tracking systems of two axes, with their simulations and testing a low-cost prototype, developed in laboratory Center of Excellence in Energy and Power Systems (CEESP). Moreover, the results show that this methodology adapts successfully to the different conditions of use to track the sun's position, both in the laboratory and in the field.
A busca pela diversidade da matriz energética no mundo é um dos desafios que estão impulsionando pesquisas para preencher essa demanda com fontes de energia alternativa. Assim temos à necessidade de explorar recursos alternativos e renováveis que tragam flexibilidade e sustentabilidade quanto à sua utilização. Diante do panorama apresentado, a geração de energia elétrica com sistemas fotovoltaicos solares é uma tendência, e tem sua tecnologia em constante avanço, apresentando-se como uma solução imediata para essa busca da diversidade. A energia extraída do Sol em sistemas de geração fotovoltaicos depende do fluxo energético proveniente da radiação solar num plano perpendicular aos raios. Por isto, a energia solar média obtida pelos painéis solares convencionais durante o decorrer do dia, nem sempre é maximizada. Uma das causas é que os painéis fixos não estão com um ângulo de zênite de zero grau em relação à posição do Sol. Assim sendo, o movimento Leste (L) à Oeste (O) diário, junto ao sazonal da Terra, afeta diretamente a intensidade de radiação recebida pelos painéis fotovoltaicos. Neste contexto, os rastreadores solares podem ser usados como dispositivos que melhoram substancialmente à eficiência dos painéis fotovoltaicos, por deixálos sempre numa posição perpendicular à radiação incidente recebida do Sol. Nesta dissertação demonstra-se uma metodologia para rastreamento solar automatizado de dois eixos para painéis fotovoltaicos. Os resultados qualitativos e quantitativos aqui apresentados evidenciam o real ganho na geração de energia por meio do desenvolvimento de um algoritmo de controle em tempo real para sistemas de rastreamento solar de dois eixos, com as respectivas simulações e testes num protótipo de baixo custo, desenvolvido no laboratório do Centro de Excelência em Energia e Sistemas de Potência (CEESP). Além disso, os resultados evidenciam que esta metodologia se adapta com êxito às diferentes condições de uso para rastrear posições do sol, tanto em laboratório como no campo.
Chen, Zhexu (Zhexu Michael). "Efficient Multi-Target Tracking using graphical models." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45632.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 103-104).
The objective of this thesis is to develop a new framework for Multi-Target Tracking (MTT) algorithms that are distinguished by the use of statistical machine learning techniques. MTT is a crucial problem for many important practical applications such as military surveillance. Despite being a well-studied research problem, MTT remains challenging, mostly because of the challenges of computational complexity faced by current algorithms. Taking a very di®erent approach from any existing MTT algorithms, we use the formalism of graphical models to model the MTT problem according to its probabilistic structure, and subsequently develop e±cient, approximate message passing algorithms to solve the MTT problem. Our modeling approach is able to take into account issues such as false alarms and missed detections. Although exact inference is intractable in graphs with a mix of both discrete and continuous random variables, such as the ones for MTT, our message passing algorithms utilize e±cient particle reduction techniques to make approximate inference tractable on these graphs. Experimental results show that our approach, while maintaining acceptable tracking quality, leads to linear running time complexity with respect to the duration of the tracking window. Moreover, our results demonstrate that, with the graphical model structure, our approach can easily handle special situations, such as out-of-sequence observations and track stitching.
by Zhexu (Michael) Chen.
M.Eng.
Khairat, Saif. "Clinical content tracking system an efficient request tracking via a graphical user interface /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4892.
Повний текст джерелаThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 28, 2008) Vita Includes bibliographical references.
Lee, Eun Ho. "Illumination, optics, and retroreflectors for efficient landmark tracking." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/15987.
Повний текст джерелаMoutzouris, Alexandros. "Accurate human pose tracking using efficient manifold searching." Thesis, Kingston University, 2013. http://eprints.kingston.ac.uk/26599/.
Повний текст джерелаЛуцик, Артур Петрович, та Artur Lutsyk. "Розробка автономної системи електропостачання дослідної лабораторії навчального корпусу №7 ТНТУ ім. І. Пулюя". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, кафедра електричної інженерії,Тернопіль, Україна, 2021. http://elartu.tntu.edu.ua/handle/lib/36695.
Повний текст джерелаУ кваліфікаційній роботі розглянуто питання розробки автономної сис¬теми електропостачання дослідної лабораторії навчального корпусу №7 ТНТУ ім. І. Пулюя та її практичне впровадження. Базовим джерелом є сонячні панелі і акумуляторні батареї, а резервним додатковим джерелом – централізована система електропостачання. У пояснювальній записці кваліфікаційної роботи розглянуто cпособи під¬ви¬щення ефективності сонячних установок та їх аналіз на базі слідкуючих систем за Сонцем. Запропоновано методику розрахунку автономних сонячних установок, розроблено конструкцію автономної сонячної установки, побудо¬ва¬но її функці¬ональну схему, проведено експериментальні дослідження побудованої установки та розроблено алгоритм роботи зворотного зв’язку
The qualifying work considers the development of an autonomous of electricity supply system of research laboratory of the educational building № 7 of Ternopil Ivan Puluj National Technical University and its practical implementation. The basic source is solar panels and batteries, and the backup additional source is a centralized power supply system. In the explanatory note of qualification work ways of increase of efficiency of solar installations and their analysis on the basis of tracking systems on the Sun are considered. The method of calculation of autonomous solar installations is offered, the design of the autonomous solar installation is developed, its functional scheme is constructed, experimental researches of the constructed installation are carried out and the algorithm of work of feedback is developed.
ЗМІСТ ВСТУП 7 1 АНАЛІТИЧНИЙ РОЗДІЛ 11 1.1 Аналіз перспектив використання сонячної енергії 11 1.2 Аналіз передумов розвитку сонячних установок 12 1.3 Способи підвищення ефективності сонячних установок 17 1.4 Аналіз сонячних установок з слідкуючими системами за Сонцем 22 1.5 Висновки до розділу 29 2 РОЗРАХУНКОВО-ДОСЛІДНИЦЬКИЙ РОЗДІЛ 30 2.1 Методика розрахунку автономних сонячних установок 30 2.2 Розрахунок та вибір інвертора 32 2.3 Розрахунок кількості акумуляторних батарей та вибір їх типу 34 2.4 Розрахунок кількості сонячних панелей та вибір їх типу 38 2.5 Розрахунок та вибір контролера 41 2.4 Висновки до розділу 43 3 ПРОЕКТНО-КОНСТРУКТОРСЬКИЙ РОЗДІЛ 44 3.1 Шляхи підвищення ефективності автономних сонячних установок 44 3.2 Розробка конструкції автономної сонячної установки 45 3.3 Розробка функціональної схеми сонячної установки 46 3.4 Експериментальні дослідження сонячної установки 49 3.5 Висновки до розділу 57 4 ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ 58 4.1 Аналіз шкідливих і небезпечних факторів, які можуть виникнути при монтажі й експлуатації сонячної установки 58 4.2 Розрахунок струму при одно- і двохполюсному дотику до струмопро-відних частин сонячної установки 59 4.3 Заходи безпеки життєдіяльності для захисту працюючих 61 ЗАГАЛЬНІ ВИСНОВКИ 66 ПЕРЕЛІК ПОСИЛАНЬ 67
Zhao, Chuan. "Towards efficient surveillance using visual tracking and camera control." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526134.
Повний текст джерелаYagoob, Muhammad Moeen. "Computationally efficient algorithms for non-linear target tracking problems." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499109.
Повний текст джерелаHamilton, Christopher. "Digital control algorithms : low power wind turbine energy maximizer for charging lead acid batteries." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1280.
Повний текст джерелаBachelors
Engineering and Computer Science
Electrical Engineering and Computer Science
Rius, Ferrer Ignasi. "Motion Priors for Efficient Bayesian Tracking In Iluman Sequence Evaluation." Doctoral thesis, Universitat Autònoma de Barcelona, 2010. http://hdl.handle.net/10803/5798.
Повний текст джерелаEl treball presentat en aquesta Tesis esta enfocat a recuperar els parametres de moviment 3D d'un model del cos huma a partir de mesures incompletes i sorolloses d'una seqüencia d'imatges monocular. Aquestes mesures consisteixen en les posicions 2D d'un conjunt redult d'articulacions en el pla d'imatge. Amb aquesta fnalitat, proposem un nou model de moviment huma específc per cada acció, que és entrenat a partir de bases de dades de captures de moviment que contenen varies execucions d'una acció en particular, i que és utilitzat com a coneixement a priori en un esquema de fltratge de partícules.
Les postures del cos es representen emprant un model articulat simple i compacte que fa ús dels cosinus directors per tal de representar la direcció de les parts del cos en l'espai Cartesia 3D. Llavors, donada una acció, s'aplica l'Analisis de Components Principals (PCA) sobre les dades d'entrenament per tal d'aplicar reducció de dimensionalitat sobre les dades d'entrada altament correlacionades. Previament al pas d'entrenament del model d'acció, les seqüencies de moviment d'entrada són sincronitzades mitjançant un nou algoritme d'adaptació dens basat en Programació Dinamica. L'algoritme sincronitza totes les seqüencies de moviment d'una mateixa classe d'acció i és capa¡ de trobar una solució óptima en temps real.
Aleshores, s'apren un model d'acció probabilístic a partir dels exemples de movi¬ment sincronitzats que captura la variabilitat i l'evolució temporal del moviment del cos sencer durant una acció concreta. En particular, per cada acció, els parametres apresos són: una varietat representativa de l'acció que consisteix en l'execució mitjana de la mateixa, la desviació estandard de l'execució mitjana, els vectors de direcció mitjans de cada subseqüencia de moviment d'una llargada donada i l'error esperat en un instant de temps donat.
A continuació, s'utilitza el model específc per cada acció com a coneixement a priori sobre moviment huma que millora l'efciencia i robustesa de tot l'enfoc de seguiment basat en fltratge de partícules. En primer lloc, el model dinamic guia les partícules segons situacions similars apreses previament. A continuació, es restringeix l'espai d'estats per tal que tan sols les postures humanes més factibles siguin acceptades com a solucions valides a cada instant de temps. En conseqüencia, l'espai d'estats és explorat de manera més efcient ja que el conjunt de partícules cobreix les postures del cos més probables.
Finalment, es duen a terme experiments emprant seqüencies de test de varies bases de dades. Els resultats assenyalen que el nostre esquema de seguiment és capa d'estimar la confguració 3D aproximada d'un model de cos sencer, a partir tan sols de les posicions 2D d'un conjunt redult d'articulacions. També s'inclouen proves separades sobre el metode de sincronització de seqüencies i de la tecnica de comparació probabilística de les subseqüencies de moviment.
Recovering human motion by visual analysis is a challenging computer vision research area with a lot of potential applications. Model based tracking approaches, and in particular particle flters, formulate the problem as a Bayesian inference task whose aim is to sequentially estimate the distribution of the parameters of a human body model over time. These approaches strongly rely on good dynamical and observation models to predict and update confgurations of the human body according to mea surements from the image data. However, it is very difcult to design observation models which extract useful and reliable information from image sequences robustly. This results specially challenging in monocular tracking given that only one viewpoint from the scene is available. Therefore, to overcome these limitations strong motion priors are needed to guide the exploration of the state space.
The work presented in this Thesis is aimed to retrieve the 3D motion parameters of a human body model from incomplete and noisy measurements of a monocular image sequence. These measurements consist of the 2D positions of a reduced set of joints in the image plane. Towards this end, we present a novel action specifc model of human motion which is trained from several databases of real motion captured performances of an action, and is used as a priori knowledge within a particle fltering scheme.
Body postures are represented by means of a simple and compact stick fgure model which uses direction cosines to represent the direction of body limbs in the 3D Cartesian space. Then, for a given action, Principal Component Analysis is applied to the training data to perform dimensionality reduction over the highly correlated input data. Before the learning stage of the action model, the input motion performances are synchronized by means of a novel dense matching algorithm based on Dynamic Programming. The algorithm synchronizes all the motion sequences of the same action class, fnding an optimal solution in real time.
Then, a probabilistic action model is learnt, based on the synchronized motion examples, which captures the variability and temporal evolution of full body motion within a specifc action. In particular, for each action, the parameters learnt are: a representative manifold for the action consisting of its mean performance, the stan dard deviation from the mean performance, the mean observed direction vectors from each motion subsequence of a given length and the expected error at a given time instant.
Subsequently, the action specifc model is used as a priori knowledge on human motion which improves the efciency and robustness of the overall particle fltering tracking framework. First, the dynamic model guides the particles according to similar situations previously learnt. Then, the state space is constrained so only feasible human postures are accepted as valid solutions at each time step. As a result, the state space is explored more efciently as the particle set covers the most probable body postures.
Finally, experiments are carried out using test sequences from several motion databases. Results point out that our tracker scheme is able to estimate the rough 3D confguration of a full body model providing only the 2D positions of a reduced set of joints. Separate tests on the sequence synchronization method and the subsequence probabilistic matching technique are also provided.
Keywords: Human Motion Modeling; Particle fltering; Monocular Full Body 3D Tracking.
Topics: Image Processing; Computer Vision; Scene Understanding; Machine Intelligence; Machine Vision Applications; Video-Sequence Evaluation
Mohammad, Shafiei Adel. "An Energy-Efficient Target Tracking Protocol Using Wireless Sensor Networks." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32384.
Повний текст джерелаSolis, Montero Andres. "Efficient Feature Extraction for Shape Analysis, Object Detection and Tracking." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34830.
Повний текст джерелаGuo, Jing-Ming, Cheng-Hsin Chang, Hua Lee, and Vincent Radzicki. "EFFICIENT ARTIFACT-FREE VIDEO SYNOPSIS FOR TARGET DETECTION AND TRACKING." International Foundation for Telemetering, 2017. http://hdl.handle.net/10150/626981.
Повний текст джерелаZhou, Huiyu. "Efficient ego-motion tracking and obstacle detection using gait analysis." Thesis, Heriot-Watt University, 2006. http://hdl.handle.net/10399/141.
Повний текст джерелаBlasse, Corinna. "Towards Accurate and Efficient Cell Tracking During Fly Wing Development." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-214923.
Повний текст джерелаHan, Shin-Chan. "Efficient global gravity field determination from satellite-to-satellite tracking." Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1061995200.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xvii, 198 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Christopher Jekeli, Dept. of Geodetic Science and Surveying. Includes bibliographical references (p. 192-198).
Ambardekar, Amol A. "Efficient vehicle tracking and classification for an automated traffic surveillance system." abstract and full text PDF (free order & download UNR users only), 2007. 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:1451111.
Повний текст джерелаSaeed, Muhammad Jasim. "A novel energy efficient wireless sensor network framework for object tracking." Thesis, Manchester Metropolitan University, 2017. http://e-space.mmu.ac.uk/622094/.
Повний текст джерелаKravaritis, Giorgos. "Stochastic Bayesian estimation using efficient particle filters for vehicle tracking applications." Thesis, University of Edinburgh, 2006. http://hdl.handle.net/1842/12112.
Повний текст джерелаKrishnaswamy, Sriram. "On Computationally Efficient Frameworks For Data Association In Multi-Target Tracking." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574672274983947.
Повний текст джерелаZuo, Tianyu. "An Efficient Vision-Based Pedestrian Detection and Tracking System for ITS Applications." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31778.
Повний текст джерелаSerhat, Gulhan. "Efficient Detection And Tracking Of Salient Regions For Visual Processing On Mobile Platforms." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611036/index.pdf.
Повний текст джерела