Articles de revues : « TRACKING OF EFFICIENCY »

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Green, Martin A. « Tracking solar cell conversion efficiency ». Nature Reviews Physics 2, n^o 4 (3 mars 2020) : 172–73. http://dx.doi.org/10.1038/s42254-020-0163-y.

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S., Preethi, Surya Prakash K, Swathi S et Vishnu B. « Implementation of Advanced Solar Tracking and Cleaning to Improve Efficiency ». Bonfring International Journal of Networking Technologies and Applications 6, n^o 1 (29 mars 2019) : 01–05. http://dx.doi.org/10.9756/bijnta.9001.

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Zikrillayev, Khayrulla, et Timur Sodiqov. « Improving energy efficiency of solar panels ». E3S Web of Conferences 401 (2023) : 04021. http://dx.doi.org/10.1051/e3sconf/202340104021.

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This article is about a photovoltaic power plant built at the Korean side's expense, equipped with Korean-made solar panels, and where the author conducted scientific and practical research. The study used a scientific-practical, observational, comparative measuring method. All solar panel trackers were set at 30° degrees and not equipped with a sun tracking system, except for only one solar panel. The tracker of the TOP SUN module has a manual tracking system for the Sun, in which a person has to manually changes position from 15° to 45° degrees depending on the seasons. Thanks to the authors, a solar tracker has been developed to improve the efficiency of solar panels, which has a sun tracking system and low energy consumption, which is a key aspect. During the day, the solar panel parameters with and without a tracking system for the Sun were obtained; also, their power was calculated, and for comparison, a graph of the power difference was plotted. On average, a solar panel with a solar tracking system generates 30 % more energy than a solar panel without a tracking system.

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Sadri, F. « Information source tracking method : efficiency issues ». IEEE Transactions on Knowledge and Data Engineering 7, n^o 6 (1995) : 947–54. http://dx.doi.org/10.1109/69.476500.

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Winkelman, Steven R., James H. Drzemiecki et Juanita M. Haydel. « Industrial energy efficiency and energy tracking ». P2 : Pollution Prevention Review 7, n^o 1 (1997) : 33–46. http://dx.doi.org/10.1002/(sici)1520-6815(199724)7:1<33 ::aid-ppr3>3.0.co;2-9.

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Prof. V. V. Deotare, Prof V. V. Deotare, Dr D. V. Padole Dr. D. V. Padole et S. K. Sawant S. K. Sawant. « High-Efficiency Auto-Tracking Solar Combined Heat and Power Generation System ». Indian Journal of Applied Research 3, n^o 7 (1 octobre 2011) : 221–23. http://dx.doi.org/10.15373/2249555x/july2013/69.

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Francisco Coelho, Roberto, Walbermark Marques dos Santos et Denizar Cruz Martins. « INFLUENCE OF POWER CONVERTERS ON PV MAXIMUM POWER POINT TRACKING EFFICIENCY ». Eletrônica de Potência 19, n^o 1 (1 février 2014) : 73–80. http://dx.doi.org/10.18618/rep.2014.1.073080.

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Ungar, Nathaniel R., Gerald Matthews, Joel S. Warm, William N. Dember, John K. Thomas, Victor S. Finomore et Tyler H. Shaw. « Demand Transitions and Tracking Performance Efficiency : Structural and Strategic Models ». Proceedings of the Human Factors and Ergonomics Society Annual Meeting 49, n^o 17 (septembre 2005) : 1523–26. http://dx.doi.org/10.1177/154193120504901704.

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A compensatory tracking task with hard and easy levels of difficulty was used to test resource depletion and effort regulation models of dual-to-single task transition effects. Both models were supported by the data. Consistent with a resource depletion view, participants who shared the difficult tracking task with a vigilance task during an induction phase, and then performed the tracking task alone during a transition phase, had greater levels of tracking error in both phases than those who were confronted only with the tracking task. By contrast, in accord with expectations derived from the effort regulation view, tracking error on the easy task was smaller during both phases of the study for participants who originally shared tracking with vigilance than for those confronted only with the tracking task. Evidently, task difficulty is a key factor in determining the domains in which these models apply.

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Taheem, Anubhav. « Optimization of Sun Tracking Data Handling to Improve Efficiency of PV Module ». Journal of Advanced Research in Alternative Energy, Environment and Ecology 06, n^o 01 (23 août 2019) : 1–15. http://dx.doi.org/10.24321/2455.3093.201901.

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Aneja, Preety. « Solar Tracker : Performance Analysis and Optimisation of Efficiency ». Journal of Advanced Research in Alternative Energy, Environment and Ecology 09, n^o 3&4 (4 février 2023) : 1–9. http://dx.doi.org/10.24321/2455.3093.202202.

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Solar energy is one of the richest source of renewable energy on Earth, thus its harnessing is very much necessary for the useful conversion of light energy into electric energy. Solar panels are developed in this direction. Many scientists have developed various methods to gather the solar irradiation in order to maximize the extraction of electric power from the Photovoltaic generators. However, the problem with the solar power is that it is directly dependent on light intensity. The main hindrance with solar panels is their low efficiency with huge investment. Studies show that a solar panel converts 20-40% of energy incident on it to electrical energy. The solution is to use a tracking system1, 7 that maintains the panel’s position orthogonal with the light source. There are many tracking systems designs available including passive and active systems with one or two axes of freedom.8, 9 It has been found that the overall efficiency gain in single-axis solar tracker designed in10 is 27% than that of fixed mechanism. We had optimised the tracker efficiency by performing the experiment with solar tracker for consecutive three days and thus results were analysed by using stat-ease software. Moreover, the testing showed that the power used by the tracking system was much less than that of power gained by tracking system. While working on the developed set-up, focus was given on the incremental efficiency of the solar power generation system. In the present work, further performance analysis is taken up with the help of various parameters viz. Specific Energy Production (SEP), Performance Ratio (PR), Ground Cover Ratio (GCR) and Surface Performance Ratio (SPR)11 to further elaborate the efficiency enhancement in solar trackers as compared to fixed systems.

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Singh, Jaspal, et Prabhdeep Kaur. « Tracking Efficiency of Exchange Traded Funds (ETFs) ». Paradigm 20, n^o 2 (décembre 2016) : 176–90. http://dx.doi.org/10.1177/0971890716670722.

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Exchange traded funds (ETFs) have emerged as a new investment vehicle in the mutual fund industry providing investors with the ability to trade the entire market through a single transaction executed at the exchange. Using a sample of 12 equity ETFs from 1 April 2011 to 31 March 2015, the present article attempts to examine the performance efficiency of ETFs in India and explore factors that drive the performance of ETFs away from their target indices. The study reveals that ETFs exhibit significant tracking error while trying to replicate the returns of their benchmark indices. The results of panel regression analysis further reveal that the assets under management and volume positively affected the tracking ability of ETFs whereas volatility is reported to have negative impact on the tracking efficiency of ETFs. The results will have important implications for investors, managers as well as for the evaluation criteria involved in assessing the performance of actively managed funds.

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Ang, B. W., A. R. Mu et P. Zhou. « Accounting frameworks for tracking energy efficiency trends ». Energy Economics 32, n^o 5 (septembre 2010) : 1209–19. http://dx.doi.org/10.1016/j.eneco.2010.03.011.

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Syrotyuk, S., V. Halchak, V. Boyarchuk, V. Syrotiuk, T. Jakubowski et J. Giełżecki. « Orientation efficiency of a Sun-tracking surface ». Journal of Physics : Conference Series 2408, n^o 1 (1 décembre 2022) : 012017. http://dx.doi.org/10.1088/1742-6596/2408/1/012017.

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Abstract The work uses common correlations of solar power engineering and spherical astronomy for measuring of orientation efficiency of a tracking surface. The presented formulas for calculation are supplied with the appropriate schemes of illumination. The research gives hour graphics, which depicts a dependence of the cosines of the angle of incidence of the surface of typical tracking devices for the periods of summer and winter solstice and equinox. The graphic materials are suitable for argumentation of the constructive decisions and comparative estimation of their efficiency.

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Chen, Sheng, et Chih Chen Chen. « Implementation of Sun Tracking for Solar Cell with Maximum Power Point Tracking ». Applied Mechanics and Materials 300-301 (février 2013) : 572–75. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.572.

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In this paper, the implement of the solar cell for sun tracking is achieved. The sun energy is abundant with clean and green energy, but the efficiency is not benefit from the source of solar panel to the power conversion output for the practical application. This paper contains the implement starting from driving solar cell with the XY-axis servo motor to trace the optimal input solar light, then the maximum power point tracking circuit (MPPT) in the Boost conversion is included to increase the efficiency for lithium battery charging. The super capacitor banks are paralleled with the lithium battery to improve the inrush power load, which is benefit for prolong the lithium battery and solar panel life; The applications of output are included two parts; one is the small green man of traffic light and the other one is AC 110V urban electric conversion; the control core for this system is PSOC chip for its simple, practical and high efficiency demand.

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Osgood, Sarah Swierenga, Kenneth R. Boff et Rebecca S. Donovan. « Rapid Communication Display Technology Efficiency in a Multi-Task Environment ». Proceedings of the Human Factors Society Annual Meeting 32, n^o 19 (octobre 1988) : 1395–99. http://dx.doi.org/10.1177/154193128803201919.

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The present study examined the advantage of Rapid Communication (RAP-COM) Display Technology over conventional spatially arrayed displays in the context of secondary task demands. This research represents an early step in assessing the use of RAP-COM display techniques in multi-task environments. Eight subjects were instructed to respond to briefly presented visual stimuli, while concurrently performing an unstable tracking task at two levels of difficulty. Duration thresholds, obtained using a moment-to-moment adaptive tracking performance procedure, were collected for RAP-COM and spatially arrayed displays while RMS error scores were collected from the unstable tracking task performance. Information transfer rates for the RAP-COM technique were faster than for the spatially distributed array under both the single and dual task conditions. Regardless of secondary tracking task difficulty, subjects were able to maintain primary task performance levels on RAP-COM and spatial display tasks, although a decrement in tracking performance was seen.

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Chu, Pinghan, Michael R. James et Zhehui Wang. « Efficiency Studies of Fast Neutron Tracking Using MCNP ». Journal of Nuclear Engineering 3, n^o 2 (30 avril 2022) : 117–27. http://dx.doi.org/10.3390/jne3020007.

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Fast neutron identification and spectroscopy is of great interest to nuclear physics experiments. Using the neutron elastic scattering, the fast neutron momentum can be measured. Wang and Morris introduced the theoretical concept that the initial fast neutron momentum can be derived from up to three consecutive elastic collisions between the neutron and the target, including the information of two consecutive recoil ion tracks and the vertex position of the third collision or two consecutive elastic collisions with the timing information. Here, we also include the additional possibility of measuring the deposited energies from the recoil ions. In this paper, we simulate the neutron elastic scattering using the Monte Carlo N-Particle Transport Code (MCNP) and study the corresponding neutron detection and tracking efficiency. The corresponding efficiency and the scattering distances are simulated with different target materials, especially natural silicon (92.23%28Si, 4.67%29Si, and 3.1%30Si) and helium-4 (4He). The timing of collision and the recoil ion energy are also investigated, which are important characters for the detector design. We also calculate the ion traveling range for different energies using the software, “The Stopping and Range of Ions in Matter (SRIM)”, showing that the ion track can be most conveniently observed in 4He unless sub-micron spatial resolution can be obtained in silicon.

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HANDA, Yoichi, Yoshikazu (D N. Nenchev) KANAMIYA et Daisuke SATO. « 2A1-A15 Path Tracking Efficiency Under Natural Motion ». Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2010 (2010) : _2A1—A15_1—_2A1—A15_3. http://dx.doi.org/10.1299/jsmermd.2010._2a1-a15_1.

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Ghajar, M. Reza, Seth J. Wilk, William Lepkowski, Bertan Bakkaloglu et Trevor J. Thornton. « Backgate Modulation Technique for Higher Efficiency Envelope Tracking ». IEEE Transactions on Microwave Theory and Techniques 61, n^o 4 (avril 2013) : 1599–607. http://dx.doi.org/10.1109/tmtt.2013.2247616.

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Shu, Ming-Hung, Jan-Yee Kung, Thanh-Lam Nguyen et Bi-Min Hsu. « Dynamically monitoring the service efficiency with tracking signals ». Industrial Management & ; Data Systems 113, n^o 9 (23 septembre 2013) : 1334–50. http://dx.doi.org/10.1108/imds-02-2013-0094.

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Ali, Mahmoud N., Karar Mahmoud, Matti Lehtonen et Mohamed M. F. Darwish. « Promising MPPT Methods Combining Metaheuristic, Fuzzy-Logic and ANN Techniques for Grid-Connected Photovoltaic ». Sensors 21, n^o 4 (10 février 2021) : 1244. http://dx.doi.org/10.3390/s21041244.

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This paper addresses the improvement of tracking of the maximum power point upon the variations of the environmental conditions and hence improving photovoltaic efficiency. Rather than the traditional methods of maximum power point tracking, artificial intelligence is utilized to design a high-performance maximum power point tracking control system. In this paper, two artificial intelligence-based maximum power point tracking systems are proposed for grid-connected photovoltaic units. The first design is based on an optimized fuzzy logic control using genetic algorithm and particle swarm optimization for the maximum power point tracking system. In turn, the second design depends on the genetic algorithm-based artificial neural network. Each of the two artificial intelligence-based systems has its privileged response according to the solar radiation and temperature levels. Then, a novel combination of the two designs is introduced to maximize the efficiency of the maximum power point tracking system. The novelty of this paper is to employ the metaheuristic optimization technique with the well-known artificial intelligence techniques to provide a better tracking system to be used to harvest the maximum possible power from photovoltaic (PV) arrays. To affirm the efficiency of the proposed tracking systems, their simulation results are compared with some conventional tracking methods from the literature under different conditions. The findings emphasize their superiority in terms of tracking speed and output DC power, which also improve photovoltaic system efficiency.

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Zhang, Wei Jing. « Design of Single Axis Tracking Solar Photovoltaic Tracking System ». Applied Mechanics and Materials 700 (décembre 2014) : 12–15. http://dx.doi.org/10.4028/www.scientific.net/amm.700.12.

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This paper presents a single axis tracking solar photovoltaic system,the system has the advantages of simple structure, high control accuracy, low cost. The tracking system be composed of sunlight sensor, controller, barrel ,motor. It can freely achieve to rotate in the space within the range from 0°to 180°. The sunshine vertical irradiation bias in the solar panel is not more than 0.3°. Compared with the fixed photovoltaic system,it can effectively improve the utilization efficiency of solar energy.

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Dong, Bo, Yan Li et Sheng Hui Wang. « Based on Fuzzy Logic Control of Recovery of the Method Research of Maximum Power Point Tracking ». Advanced Materials Research 433-440 (janvier 2012) : 622–28. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.622.

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It is very crucial to find a suitable tracking method, because improving the efficiency of the maximum power point tracking will improve the efficiency of tracking improved solar energy utilization to the present generation system. Based on fuzzy logic control of recovery of maximum power point tracking is enough to a system for solar energy utilization. Based on MATLAB/simulink software, comparing the fuzzy logic controller of different dimensions and different simulation emulated, this article find each factor to influence the tracking accuracy and speed, and it will provide the basis for different systems.

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Marańda, W., et M. Piotrowicz. « Efficiency of maximum power point tracking in photovoltaic system under variable solar irradiance ». Bulletin of the Polish Academy of Sciences Technical Sciences 62, n^o 4 (1 décembre 2014) : 713–21. http://dx.doi.org/10.2478/bpasts-2014-0077.

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Abstract Field conditions decrease the energy output of photovoltaic (PV) systems, mainly due to excessive temperatures. However, in regions with moderate ambient temperatures, as in Poland, solar energy is commonly delivered with highly fluctuating irradiance. This introduces yet another source of energy losses due to the non-ideal tracking of actual position of Maximum Power Point (MPP). Majority of PV-systems are equipped with DC/AC and grid-connected inverter. Since the solar energy flux is variable, an adequate MPP-tracking algorithm is required to handle a wide range of load levels and face rapid changes of input power. Along with the essential DC/AC conversion, the quality of MPP-tracking must also be taken into account in evaluation of inverter efficiency. The tracking in dynamic conditions has been addressed only recently. Several algorithms has been studied theoretically, experimentally or in laboratory conditions by applying artificial input test-patterns. This work takes the opposite approach by applying the recorded real-life solar irradiance and simulating the tracking behavior to study the problem for true field conditions in Poland. The simulation uses the unique high-quality irradiance data collected with 200 ms time resolution. The calculation of both static and dynamic MPP-tracking efficiency has been performed for representative variable-cloudy day, applying commonly used Perturb&Observe tracking algorithm.

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Xu, Jiahong, Jing Lai, Rui Guo, Xiaoxiao Lu et Lihong Xu. « Efficiency-Oriented MPC Algorithm for Path Tracking in Autonomous Agricultural Machinery ». Agronomy 12, n^o 7 (12 juillet 2022) : 1662. http://dx.doi.org/10.3390/agronomy12071662.

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Path-tracking control algorithms in agriculture typically focus on how to improve the trajectory-tracking performance of autonomous agricultural machinery, and the agricultural productivity is optimized in a two-layer way. The upper operational layer optimizes an optimal tracking trajectory with the best agricultural productivity, and the lower control layer—such as Nonlinear Model Predictive Control (NMPC)—receives this optimized tracking trajectory first, and then steers the vehicle to track this trajectory with high accuracy. However, this two-layer structure cannot improve the agricultural productivity at the control layer online, which makes the agricultural operation sub-optimal. In this paper, we focus on agricultural machinery operational efficiency, to represent agricultural productivity; in order to realize optimizing control to further improve agricultural machinery operational efficiency, a new path-tracking control algorithm, named Efficiency-oriented Model Predictive Control (EfiMPC), is proposed. EfiMPC is intrinsically a nested structure, which can consider the global performance of the whole system defined in the operational layer—like the agricultural machinery operational efficiency considered in this paper—in the control layer online; thus, the agricultural machinery operational efficiency can be improved during the farming operation. An unreachable tracking point, denoted as the pseudo-point, has been proposed, to indicate the agricultural machinery operational efficiency objective in a receding horizon fashion; EfiMPC can utilize this pseudo-point to realize the optimizing control online. A simulation case study was used to test the superiority of the proposed EfiMPC algorithm, and the results show that, compared with the traditional NMPC algorithm, the agricultural machinery operational efficiency realized by EfiMPC was improved by 8.56%; thus, the effectiveness of the EfiMPC has been demonstrated.

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Ramireddy, P., et Dr G. Ramya. « Investigation on Maximum Power Point Tracking Algorithm (INC and FLC) for Effective Utilization of Power Under Partial Shaded Photovoltaic System ». Alinteri Journal of Agriculture Sciences 36, n^o 1 (22 juin 2021) : 342–49. http://dx.doi.org/10.47059/alinteri/v36i1/ajas21051.

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Aim: This paper makes a comparative analysis on two types of maximum power point tracking algorithm to trace the global peak power efficiently with minimum oscillation and less tracking time under partial shaded photovoltaic green energy systems. Materials & Methods: Incremental conductance (INC) and fuzzy logic (FLC) MPPT algorithm are implemented to analyze the tracking efficiency under varying insolation conditions. Results: FLC MPP algorithm extracts peak power of 97.6 W with tracking time of 0.003s while INC extracts 94 W with tracking time of 0.004s. Conclusion: FLC MPPT algorithm provides better efficiency compared to INC algorithm for the selected data set.

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Li, Yani, Zhangming Zhu, Yintang Yang, Yadong Sun et Xu Wang. « A Novel Interface Circuit with 99.2% MPPT Accuracy and 1.3% THD for Energy Harvesting ». Journal of Circuits, Systems and Computers 26, n^o 11 (28 mars 2017) : 1750176. http://dx.doi.org/10.1142/s0218126617501766.

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To improve conversion efficiency and output quality of the energy harvester, a novel interface circuit with composite maximum power point tracking (MPPT) in energy harvesting applications is proposed in this paper. By using the ultra-low-voltage multiplier with digital control and simple one-cycle variable frequency technique, the converter realizes fast power tracking and high conversion efficiency, and minimizes the power consumption and harmonics, thereby obtaining high tracking precise and low total harmonic distortion (THD). Implemented in 65-nm CMOS process, this converter achieves 85.9% peak power efficiency with dc output voltage of 1.6[Formula: see text]V. The peak tracking efficiency and THD are 99.2% and 1.3%, respectively. The peak output power is 18.31[Formula: see text][Formula: see text]W, and the power loss of the entire converter is only 16.53[Formula: see text][Formula: see text]W.

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Zhang, Lieping, Yanlin Yu, Hang Ma, Yu Zhang et Peng Cao. « Design of Photovoltaic Power Supply MPPT Circuit for WSN Node Based on Current Observation ». International Journal of Online Engineering (iJOE) 14, n^o 07 (27 juillet 2018) : 45. http://dx.doi.org/10.3991/ijoe.v14i07.8495.

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In view of the problem of low energy collection efficiency and low efficiency of photovoltaic power supply modules in wireless sensor networks, a maximum power point tracking algorithm suitable for photovoltaic power supply of wireless sensor nodes is proposed. Firstly, the photovoltaic cell model is analyzed. Based on this, the traditional maximum power point tracking algorithm is analyzed. Combining with the advantages of disturbance observing method and load current maximization method, the problem of low working efficiency and low energy collection efficiency of functional modules is solved. Current observation method maximum power point tracking algorithm, and complete the relevant hardware circuit design. Experimental results show that the power consumption of MPPT circuit is low, and the efficiency caused by environmental factors is very small. The efficiency is kept above 90% and the overall system efficiency is about 87%, which provides a stable and reliable photovoltaic power supply for WSN nodes.

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Smith, Andrew. « “How Are We Doing?” Tracking Efficiency, Utilization, and Productivity ». Universal Journal of Industrial and Business Management 1, n^o 4 (décembre 2013) : 137–40. http://dx.doi.org/10.13189/ujibm.2013.010402.

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Suh, Kisoo, et Yunsung Eom. « Price Efficiency of KOSPI200 Tracking ETF and Its Determinants ». Korean Corporation Management Review 26, n^o 5 (31 octobre 2019) : 1–24. http://dx.doi.org/10.21052/kcmr.2019.26.5.01.

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Vatasescu, M., I. Visa, D. Diaconescu, I. Hermenean, N. Creanga et D. Tohoneanu. « New solar angles and their corresponding tracking systems efficiency ». Renewable Energy and Power Quality Journal 1, n^o 08 (avril 2010) : 903–8. http://dx.doi.org/10.24084/repqj08.511.

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Zhong, W. X., et S. Y. R. Hui. « Maximum Energy Efficiency Tracking for Wireless Power Transfer Systems ». IEEE Transactions on Power Electronics 30, n^o 7 (juillet 2015) : 4025–34. http://dx.doi.org/10.1109/tpel.2014.2351496.

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Hidayanti, Fitria. « Dual-Axis Solar Tracking System Efficiency for Hydroponics Pump ». International Journal of Emerging Trends in Engineering Research 8, n^o 6 (25 juin 2020) : 2631–34. http://dx.doi.org/10.30534/ijeter/2020/67862020.

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Varga, Dezső, Gábor Nyitrai, Gergő Hamar et László Oláh. « High Efficiency Gaseous Tracking Detector for Cosmic Muon Radiography ». Advances in High Energy Physics 2016 (2016) : 1–11. http://dx.doi.org/10.1155/2016/1962317.

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A tracking detector system has been constructed with an innovative approach to the classical multiwire proportional chamber concept, using contemporary technologies. The detectors, covering an area of 0.58 square meters each, are optimized for the application of muon radiography. The main features are high (>99.5%) and uniform detection efficiency, 9 mm FWHM position resolution, and filling gas consumption below 2 liters per hour for the nontoxic, nonflammable argon and carbon dioxide mixture. These parameters, along with the simplicity of the construction and the tolerance for mechanical effects, make the detectors a viable option for a large area muography observation system.

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Ang, B. W., et X. Y. Xu. « Tracking industrial energy efficiency trends using index decomposition analysis ». Energy Economics 40 (novembre 2013) : 1014–21. http://dx.doi.org/10.1016/j.eneco.2013.05.014.

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Pasaribu, Nova, Rusdianasari et Aida Syarif. « Efficiency of 9KWp Sun Tracking Photovoltaic in Palembang, Indonesia ». IOP Conference Series : Earth and Environmental Science 347 (8 novembre 2019) : 012129. http://dx.doi.org/10.1088/1755-1315/347/1/012129.

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Johnson, Ben, Hortense Bioy, Alastair Kellett et Lee Davidson. « On the Right Track : Measuring Tracking Efficiency in ETFs ». Journal of Index Investing 4, n^o 3 (30 novembre 2013) : 35–41. http://dx.doi.org/10.3905/jii.2013.4.3.035.

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Nugraha, Anggara Trisna, Moch Fadhil Ramadhan et Muhammad Jafar Shiddiq. « Efficiency of the Position Tracking Photovoltaics using Microcontroller Atmega ». JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) 5, n^o 2 (26 septembre 2022) : 77–90. http://dx.doi.org/10.26905/jeemecs.v5i2.6031.

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So far, solar cells are known to have many weaknesses in terms of installation and position to the sun, so that the performance of solar cells on rechargeable batteries is less than optimal. Therefore, additional tools are needed to support these solar cells so that they can work optimally and produce bigger currents. Compare a sunlight tracker with an LDR system, and compare a sunlight tracker with a direct sunlight sensor with a passive system. Atmega16 is used as a control motor and automatic charger, LDR is used as a sunshine receiver, and a DC motor and a stepper are used as a sunshine indicator player. The solar cell used has a capacity of 20 WP. The automatic filling system uses a microcontroller to increase the cost and efficiency of installation. After that, the two systems will be compared first to find out the difference in power generated by the solar cell system using a tracer and a passive tracer. Using a tracking system will collect data for a week, while using a passive system will collect data for a week. By using the result data to be analyzed, the system can be analyzed and compared, and its efficiency can be determined. The solar cell tracking system is expected to increase battery charge faster than passive locations

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Kirol, Christopher P., Dylan C. Kesler, Brett L. Walker et Bradley C. Fedy. « Coupling Tracking Technologies to Maximize Efficiency in Avian Research ». Wildlife Society Bulletin 44, n^o 2 (6 mai 2020) : 406–15. http://dx.doi.org/10.1002/wsb.1092.

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Seme, Sebastijan, Gorazd Štumberger et Jože Voršič. « Maximum Efficiency Trajectories of a Two-Axis Sun Tracking System Determined Considering Tracking System Consumption ». IEEE Transactions on Power Electronics 26, n^o 4 (avril 2011) : 1280–90. http://dx.doi.org/10.1109/tpel.2011.2105506.

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Xu, Yan, Xiao Feng Zhu, Guo Sheng Zhang et Yang Li. « Simulation and Comparison on Photoelectric Conversion Efficiency for Auto Tracking Solar System and Fixed Solar System ». Applied Mechanics and Materials 263-266 (décembre 2012) : 620–23. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.620.

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Assuming the clearness and cloudless weather in Beijing area, the received solar radiation power is simulated according to three different auto-tracking solar systems and fixed solar system by Matlab. The tracking intervals of three different auto-tracking solar systems are separately 60mins, 30mins and 10mins. The daily mean solar radiation, the monthly mean solar radiation and the yearly mean solar radiation are simulated for three auto-tracking solar systems and fixed solar system. The simulation results can be used as the auto-tracking solar system design reference for engineers, and helpful for solar system optimizing.

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Harmini, Harmini, et Titik Nurhayati. « DESAIN DAN IMPLEMENTASI MAXIMUM POWER SOLAR TRACKER MENGGUNAKAN PANEL PHOTOVOLTAIC DI KOTA SEMARANG ». eLEKTRIKA 10, n^o 1 (19 juin 2019) : 5. http://dx.doi.org/10.26623/elektrika.v10i1.1103.

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The purpose of this research is to design and implementation Maximum Solar Power Tracking system using photovoltaic panel, in order to increase solar panel efficiency and power. Data collection is done for the condition in Semarang city. The result of the research is expected to be base in planning of solar power system in Semarang city, whether it is for light-ing lamp planning and for Solar Home System (SHS). This MPPT system design uses standard 180 degree servo motor to drive photovoltaic panel and control circuit using ATmega IC, while simulation using MATLAB program. Tracking is done by online tracking method by moving the photovoltaic panel to the radiation of the sun. Tracking simulation is done with step 20, 50 and 180 step. The average of voltage generated by system without tracking is 3.97 Volt while the average volt-age generated by tracking system is 4.72 Volt. Efficiency between system without tracking and tracking system is 66.28% for tracking system and 78.78% for tracking system. Keywords: MPPT,Solar Photovoltaic, Tracking

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Harmini, Harmini, et Titik Nurhayati. « DESAIN DAN IMPLEMENTASI MAXIMUM POWER SOLAR TRACKER MENGGUNAKAN PANEL PHOTOVOLTAIC DI KOTA SEMARANG ». Elektrika 10, n^o 1 (4 avril 2018) : 5. http://dx.doi.org/10.26623/elektrika.v10i1.1117.

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The purpose of this research is to design and implementation Maximum Solar Power Tracking system using photovoltaic panel, in order to increase solar panel efficiency and power. Data collection is done for the condition in Semarang city. The result of the research is expected to be base in planning of solar power system in Semarang city, whether it is for light-ing lamp planning and for Solar Home System (SHS). This MPPT system design uses standard 180 degree servo motor to drive photovoltaic panel and control circuit using ATmega IC, while simulation using MATLAB program. Tracking is done by online tracking method by moving the photovoltaic panel to the radiation of the sun. Tracking simulation is done with step 20, 50 and 180 step. The average of voltage generated by system without tracking is 3.97 Volt while the average volt-age generated by tracking system is 4.72 Volt. Efficiency between system without tracking and tracking system is 66.28% for tracking system and 78.78% for tracking system.Keywords: MPPT,Solar Photovoltaic, Tracking.

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Yoo, Jong Ho, Sun Hee Kim, Dong Jun An, Won Chang Choi et Soon Jong Yoon. « Generation Efficiency of Tracking Type Floating PV Energy Generation Structure Using Fiber Reinforced Polymer Plastic (FRP) Members ». Key Engineering Materials 730 (février 2017) : 212–17. http://dx.doi.org/10.4028/www.scientific.net/kem.730.212.

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In this paper, the tracking type floating PV energy generation system is studied and developed to improve the generation efficiency. First of all, to find suitable material for members of floating type PV energy generation system, suitability analysis for several materials such as a steel, aluminum, polyethylene (PE), and fiber reinforced polymer plastic (FRP) is conducted. Then the design for tracking type floating PV energy generation system is also conducted. The tracking type floating PV energy generation system is designed, fabricated, and installed at Hapcheon dam, Korea. Finally, to estimate the energy generation efficiency of tracking type floating PV energy generation system, comparison with land fixed type PV energy generation system is performed. As a result of the comparison, it is confirmed that if the period of operating PV energy generation system is longer, the economic efficiency of tracking type will be higher than that of land fixed type.

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P, Mayilvahanan, Purushothaman S et Rajeswari P. « Facial tracking in video transfer using watershed segmentation ». International Journal of Engineering & ; Technology 3, n^o 4 (13 novembre 2014) : 535. http://dx.doi.org/10.14419/ijet.v3i4.3633.

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This paper presents the implementation of watershed segmentation for facial tracking. It focuses on tracking face of human in a continuous video transfer. The database is obtained from internet resource. Tracking efficiency is 97.2%. Keywords: Facial Tracking, Watershed Segmentation, Motion Estimation.

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Balogun, Emmanuel B., Xu Huang et Dat Tran. « Efficiency of Sensor Devices Used in Dynamic Solar Tracking System : Comparative Assessment Parameters Review ». Applied Mechanics and Materials 448-453 (octobre 2013) : 1437–45. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1437.

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There have been recent research interests in obtaining an optimum efficient design for the solar tracking system in published papers over the past three decades. This paper presents an in-depth overview of the assessment parameters and characteristics of various sensor devices employed to provide precise feedback control mechanism used in dynamic solar tracking systems. We found that the webcam sensor device has superior capability compared to other solar sensors devices. In conclusion, we propose a future research direction for a better efficiency and effective dynamic solar tracking system. Keywords: Solar tracking; Solar sensors; Solar panels; Overall output generated energy; Webcam; Photoresistors; Photodiodes; Feedback Control mechanism

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Yang, Yong You, Wei Dong Yi et Ko Wen Jwo. « High Efficiency MPPT Using Piecewise Linear Approximation and Temperature Compensation ». Advanced Materials Research 772 (septembre 2013) : 658–63. http://dx.doi.org/10.4028/www.scientific.net/amr.772.658.

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We propose a method of piecewise linear approximation with temperature compensated to model the characteristics of the maximum power points locus of photovoltaic panel under different irradiance levels and temperatures. This method can fast tracking photovoltaic panel maximum power point, and can also overcome the problem of the temperature drift. The simulation and experiment results indicate that, the maximum power point tracking efficiency of the proposed method is up to 90% ~ 99.9% under diffident irradiance.

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Morey, Stephanie A., Nicole A. Thomas et Jason S. McCarley. « Dual-Task Redundant-Target Processing : The Case of the Limited Capacity Parallel Model ». Proceedings of the Human Factors and Ergonomics Society Annual Meeting 62, n^o 1 (septembre 2018) : 661–65. http://dx.doi.org/10.1177/1541931218621476.

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We examined the effect of a central tracking task on visual target processing efficiency in a combined target detection / manual tracking paradigm. Participants performed a redundant-target task by itself, and concurrently with the tracking task. A measure of workload capacity gauged target processing efficiency. Processing was less efficient than predicted by a standard parallel race model under both levels of task load. However, data suggested no difference in processing efficiency between the single-and dual-task conditions. Our findings provide further evidence that processing capacity for peripheral visual targets is consistently limited but robust against changes to concurrent task load.

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Muhammad, Burhan, Jin Oh Seung, Kim Choon Ng et Wongee Chun. « Experimental Investigation of Multijunction Solar Cell Using Two Axis Solar Tracker ». Applied Mechanics and Materials 818 (janvier 2016) : 213–18. http://dx.doi.org/10.4028/www.scientific.net/amm.818.213.

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Solar cell is the most cost effective and simple device to harvest solar energy as compared to other systems. Many types of single junction solar cell are available in market but their main problem is low efficiency. This paper focuses on the performance investigation of high efficiency multijunction solar cell using two axis solar tracker. High solar concentration is needed for multijunction solar cell with accurate solar tracking to get maximum energy output. Solar tracker is based upon the astronomical algorithm of solar tracking. Tracking System consists of GPS module, AVR microcontroller, stepper motors with drive modules and some other accessories. The tracking system takes geographical location data from GPS to calculate sun position for tracking.

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Muhammad, Burhan, Jin Oh Seung, Kim Choon Ng et Wongee Chun. « Experimental Investigation of Multijunction Solar Cell Using Two Axis Solar Tracker ». Applied Mechanics and Materials 819 (janvier 2016) : 536–40. http://dx.doi.org/10.4028/www.scientific.net/amm.819.536.

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Solar cell is the most cost effective and simple device to harvest solar energy as compared to other systems. Many types of single junction solar cell are available in market but their main problem is low efficiency. This paper focuses on the performance investigation of high efficiency multijunction solar cell using two axis solar tracker. High solar concentration is needed for multijunction solar cell with accurate solar tracking to get maximum energy output. Solar tracker is based upon the astronomical algorithm of solar tracking. Tracking System consists of GPS module, AVR microcontroller, stepper motors with drive modules and some other accessories. The tracking system takes geographical location data from GPS to calculate sun position for tracking.

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Nelson, K., Y. Guo, D. Amidei et E. Diehl. « Performance of Michigan sMDT prototype chambers for the HL-LHC ATLAS muon detector upgrade ». Journal of Instrumentation 16, n^o 11 (1 novembre 2021) : P11027. http://dx.doi.org/10.1088/1748-0221/16/11/p11027.

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Abstract A new small-diameter Monitored Drift Tube (sMDT) chamber has been developed for the muon spectrometer of the ATLAS experiment to handle the higher collision rates expected at the CERN High Luminosity Large Hadron Collider (HL-LHC). This paper presents measurements of the tracking resolution and hit efficiency of two prototype sMDT chambers constructed at the University of Michigan. Using cosmic-ray muons the sMDT tracking resolution of 103.7 ± 8.1 μm was measured for one chamber and 101.8 ± 7.8 μm for the other, compared with a design resolution of 106 μm. A further tracking resolution improvement to 83.4 ± 7.8 μm was obtained by using new high-gain readout electronics which will be added for HL-LHC. An average tracking efficiency of (98.5 ± 0.2)% was found for both chambers. The methodology used to determine the detector tracking resolution and efficiency, including reconstruction of sMDT data and a Geant4 simulation of the test chamber, is presented in detail.

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