Готові списки джерел за темами / Electro-optical Model

Добірка наукової літератури з теми "Electro-optical Model"

Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Electro-optical Model"

1

Capmany, José, and Carlos R. Fernández-Pousa. "Quantum model for electro-optical amplitude modulation." Optics Express 18, no. 24 (November 17, 2010): 25127. http://dx.doi.org/10.1364/oe.18.025127.

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2

Capmany, José, and Carlos R. Fernández-Pousa. "Quantum model for electro-optical phase modulation." Journal of the Optical Society of America B 27, no. 6 (April 30, 2010): A119. http://dx.doi.org/10.1364/josab.27.00a119.

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3

Liu, Pengcheng, Yingqi Ma, and Jianwei Han. "Preliminary Study on Detecting the Internal Voltage Values of Integrated Circuits Based on Electro-Optical Frequency Mapping." Applied Sciences 12, no. 3 (January 24, 2022): 1188. http://dx.doi.org/10.3390/app12031188.

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Electro-optical frequency mapping (EOFM) technology can detect node signals from the backside of integrated circuits (ICs). In the past, the detected signal only qualitatively represented the electrical activity strength inside the device. In this paper, the electro-optical signal generation mechanism of the device is systematically studied, and a concise physical model of laser beam modulation based on the optical transmission matrix is proposed. Firstly, the influence of the bandwidth of the laser and each structure covered by the laser spot on the electro-optical signal of the device is well described by the model. Secondly, the model quantifies the electro-optical signal strength, and shows it is positively correlated with the laser wavelength and the reverse bias voltage. Finally, the model is used to quantitatively calculate the accurate voltage level of the internal node inside the device using the detected signal, and the calculation results match well with the experimental results. The model provides theoretical guidance for the efficient and accurate extraction of internal voltage values of devices by EOFM technology.
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4

Qin, Ming, Huaixun Luan, Enqiao Xiao, and Peng Xu. "P‐6.3: A New Inspection and Evaluation System for Electro‐optical Characteristics of Display Module." SID Symposium Digest of Technical Papers 54, S1 (April 2023): 686–89. http://dx.doi.org/10.1002/sdtp.16385.

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By referring to semiconductor measurement technology, we have established an evaluation system (CMCI‐G100, or G100 for short), which can provide a novel evaluation model for electro‐optical characteristics of display module. G100 can achieve ns‐ level synchronous acquisition of electric and optical parameters, which is attributed to the optimization of optical, mechanical and electrical design. On this basis, the software algorithm uniformly models the high‐precision synchronous electro‐optical signal parameters, and evaluates the display quality from a new dimension of electro‐optical collaboration. Besides, G100 support high‐precision electrical and optical parameter measurement, which will bring great help to laboratory work. Owing to the electro‐optical synchronization, G100 can greatly improve the efficiency of Gamma correction.
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5

Liu, Chao, Yao Mao, and Xiaoxia Qiu. "Disturbance-Observer-Based LQR Tracking Control for Electro-Optical System." Photonics 10, no. 8 (August 3, 2023): 900. http://dx.doi.org/10.3390/photonics10080900.

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To improve the dynamic property and the disturbance suppression ability of an electro-optical tracking system, this paper presents a disturbance-observer-based LQR tracking control method. The disturbance-observer-based robust controller is composed of three parts: one is the LQR tracking controller, one is the reference model controller and the other is a compensatory controller designed with the output of the disturbance observer. The uncertainty and disturbances are considered in the controller design. By Lyapunov stability theory and linear matrix inequality (LMI) technique, the sufficient conditions for observer gain and controller gain of the tracking reference model of the electro-optical system are given. Simulation and experimental results show that the proposed method in this paper not only improved the disturbance suppression ability of the electro-optical tracking system but also improved the dynamic property of the electro-optical tracking system, such as rise time, settling time and system overshoot. Specially, compared with other methods in this paper, the tracking accuracy and the disturbance suppression ability of the proposed method are about two to three times higher. The method presented in this paper has important reference value in the field of electro-optical system applications. But, with the development of electro-optical system applications, the tracking accuracy and disturbance suppression ability of the proposed method cannot meet the actual requirements of an electro-optical system. The next step of this paper will consider a variety of practical requirements, such as the controller saturation problem and tracking reference target with strong maneuverability, and further optimize the proposed method.
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6

Hulea, Mircea, Zabih Ghassemlooy, Sujan Rajbhandari, Othman Isam Younus, and Alexandru Barleanu. "Optical Axons for Electro-Optical Neural Networks." Sensors 20, no. 21 (October 27, 2020): 6119. http://dx.doi.org/10.3390/s20216119.

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Recently, neuromorphic sensors, which convert analogue signals to spiking frequencies, have been reported for neurorobotics. In bio-inspired systems these sensors are connected to the main neural unit to perform post-processing of the sensor data. The performance of spiking neural networks has been improved using optical synapses, which offer parallel communications between the distanced neural areas but are sensitive to the intensity variations of the optical signal. For systems with several neuromorphic sensors, which are connected optically to the main unit, the use of optical synapses is not an advantage. To address this, in this paper we propose and experimentally verify optical axons with synapses activated optically using digital signals. The synaptic weights are encoded by the energy of the stimuli, which are then optically transmitted independently. We show that the optical intensity fluctuations and link’s misalignment result in delay in activation of the synapses. For the proposed optical axon, we have demonstrated line of sight transmission over a maximum link length of 190 cm with a delay of 8 μs. Furthermore, we show the axon delay as a function of the illuminance using a fitted model for which the root mean square error (RMS) similarity is 0.95.
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7

Smirnov, Konstantin S., Daniel Bougeard, and Poonam Tandon. "Electro-optical Parameters of Bond Polarizability Model for Aluminosilicates." Journal of Physical Chemistry A 110, no. 13 (April 2006): 4516–23. http://dx.doi.org/10.1021/jp060151+.

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8

Górecki, Krzysztof, and Przemysław Ptak. "New dynamic electro-thermo-optical model of power LEDs." Microelectronics Reliability 91 (December 2018): 1–7. http://dx.doi.org/10.1016/j.microrel.2018.07.132.

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9

Horoshko, D. B., M. M. Eskandary, and S. Ya Kilin. "Quantum model for traveling-wave electro-optical phase modulator." Journal of the Optical Society of America B 35, no. 11 (October 11, 2018): 2744. http://dx.doi.org/10.1364/josab.35.002744.

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10

Akram, Shazad, Kent Bertilsson, and Johan Siden. "LTspice Electro-Thermal Model of Joule Heating in High Density Polyethylene Optical Fiber Microducts." Electronics 8, no. 12 (December 1, 2019): 1453. http://dx.doi.org/10.3390/electronics8121453.

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At present, optical fiber microducts are joined together by mechanical type joints. Mechanical joints are bulky, require more space in multiple duct installations, and have poor water sealing capability. Optical fiber microducts are made of high-density polyethylene which is considered best for welding by remelting. Mechanical joints can be replaced with welded joints if the outer surface layer of the optical fiber microduct is remelted within one second and without thermal damage to the inner surface of the optical fiber duct. To fulfill these requirements, an electro-thermal model of Joule heat generation using a copper coil and heat propagation inside different layers of optical fiber microducts was developed and validated. The electro-thermal model is based on electro-thermal analogy that uses the electrical equivalent to thermal parameters. Depending upon the geometric shape and material properties of the high-density polyethylene, low-density polyethylene, and copper coil, the thermal resistance and thermal capacitance values were calculated and connected to the Cauer RC-ladder configuration. The power input to Joule heating coil and thermal convection resistance to surrounding air were also calculated and modelled. The calculated thermal model was then simulated in LTspice, and real measurements with 50 µm K-type thermocouples were conducted to check the validity of the model. Due to the non-linear transient thermal behavior of polyethylene and variations in the convection resistance values, the calculated thermal model was then optimized for best curve fitting. Optimizations were conducted for convection resistance and the power input model only. The calculated thermal parameters of the polyethylene layers were kept intact to preserve the thermal model to physical structure relationship. Simulation of the optimized electro-thermal model and actual measurements showed to be in good agreement.
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Дисертації з теми "Electro-optical Model"

1

Zhang, Bo. "Design, modelling and simulation of a novel micro-electro-mechanical gyroscope with optical readouts." Thesis, Cape Peninsula University of Technology, 2007. http://hdl.handle.net/20.500.11838/1101.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2007
Micro Electro-Machnical Systems (MEMS) applications are fastest development technology present. MEMS processes leverage mainstream IC technologies to achieve on chip sensor interface and signal processing circuitry, multi-vendor accessibility, short design cycles, more on-chip functions and low cost. MEMS fabrications are based on thin-film surface microstructures, bulk micromaching, and LIGA processes. This thesis centered on developing optical micromaching inertial sensors based on MEMS fabrication technology which incorporates bulk Si into microstructures. Micromachined inertial sensors, consisting of the accelerometers and gyroscopes, are one of the most important types of silicon-based sensors. Microaccelerometers alone have the second largest sales volume after pressure sensors, and it is believed that gyroscopes will soon be mass produced at the similar volumes occupied by traditional gyroscopes. A traditional gyroscope is a device for measuring or maintaining orientation, based on the principle of conservation of angular momentum. The essence of the gyroscope machine is a spinning wheel on an axle. The device, once spinning, tends to resist changes to its orientation due to the angular momentum of the wheel. In physics this phenomenon is also known as gyroscopic inertia or rigidity in space. The applications are limited by the huge volume. MEMS Gyroscopes, which are using the MEMS fabrication technology to minimize the size of gyroscope systems, are of great importance in commercial, medical, automotive and military fields. They can be used in cars for ASS systems, for anti-roll devices and for navigation in tall buildings areas where the GPS system might fail. They can also be used for the navigation of robots in tunnels or pipings, for leading capsules containing medicines or diagnostic equipment in the human body, or as 3-D computer mice. The MEMS gyroscope chips are limited by high precision measurement because of the unprecision electrical readout system. The market is in need for highly accurate, high-G-sustainable inertial measuring units (IMU's). The approach optical sensors have been around for a while now and because of the performance, the mall volume, the simplicity has been popular. However the production cost of optical applications is not satisfaction with consumer. Therefore, the MEMS fabrication technology makes the possibility for the low cost and micro optical devices like light sources, the waveguide, the high thin fiber optical, the micro photodetector, and vary demodulation measurement methods. Optic sensors may be defined as a means through which a measurand interacts with light guided in an optical fiber (an intrinsic sensor) or guided to (and returned from) an interaction region (an extrinsic sensor) by an optical fiber to produce an optical signal related to the parameter of interest. During its over 30 years of history, fiber optic sensor technology has been successfully applied by laboratories and industries worldwide in the detection of a large number of mechanical, thermal, electromagnetic, radiation, chemical, motion, flow and turbulence of fluids, and biomedical parameters. The fiber optic sensors provided advantages over conventional electronic sensors, of survivability in harsh environments, immunity to Electro Magnetic Interference (EMI), light weight, small size, compatibility with optical fiber communication systems, high sensitivity for many measurands, and good potential of multiplexing. In general, the transducers used in these fiber optic sensor systems are either an intensity-modulator or a phase-modulator. The optical interferometers, such as Mach-Zehnder, Michelson, Sagnac and Fabry-Perot interferometers, have become widely accepted as a phase modulator in optical sensors for the ultimate sensitivity to a range of weak signals. According to the light source being used, the interferometric sensors can be simply classified as either a coherence interferometric sensor if a the interferometer is interrogated by a coherent light source, such as a laser or a monochromatic light, or a lowcoherence interferometric sensor when a broadband source a light emitting diode (LED) or a superluminescent diode (SLD), is used. This thesis proposed a novel micro electro-mechanical gyroscope system with optical interferometer readout system and fabricated by MEMS technology, which is an original contribution in design and research on micro opto-electro-mechanical gyroscope systems (MOEMS) to provide the better performances than the current MEMS gyroscope. Fiber optical interferometric sensors have been proved more sensitive, precision than other electrical counterparts at the measurement micro distance. The MOMES gyroscope system design is based on the existing successful MEMS vibratory gyroscope and micro fiber optical interferometer distances sensor, which avoid large size, heavy weight and complex fabrication processes comparing with fiber optical gyroscope using Sagnac effect. The research starts from the fiber optical gyroscope based on Sagnac effect and existing MEMS gyroscopes, then moving to the novel design about MOEMS gyroscope system to discuss the operation principles and the structures. In this thesis, the operation principles, mathematics models and performances simulation of the MOEMS gyroscope are introduced, and the suitable MEMS fabrication processes will be discussed and presented. The first prototype model will be sent and fabricated by the manufacture for the further real time performance testing. There are a lot of inventions, further research and optimize around this novel MOEMS gyroscope chip. In future studying, the research will be putted on integration three axis Gyroscopes in one micro structure by optical sensor multiplexing principles, and the new optical devices like more powerful light source, photosensitive materials etc., and new demodulation processes, which can improve the performance and the interface to co-operate with other inertial sensors and navigation system.
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2

Hernandez, Gerardo Rodriguez. "Study of mixed mode electro-optical operations of Ge2Sb2Te5." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:5bb8c1f5-2f4b-4eb0-a61a-3978af04211f.

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Chalcogenide based Phase Change Materials are currently of great technological interest in the growing field of optoelectronics. Ge2Sb2Te5 (GST) is the most widely studied phase change material, and it has been commercially used in both optical and electronic data storage applications, due to its ability to switch between two different atomic configurations, at high speed and with low power consumption, as well as its high optical and electrical contrast between amorphous and crystalline states. Despite its well-known optical and electrical properties, the operation in combination of optical and electrical domains has not yet been fully investigated. This work studies the operation of GST nano-devices exposed to a combination of optical and electrical stimuli or mixed mode by asking, is it possible to electrically measure an optically induced phase change, or vice versa? If so, how do the optical and electrical responses relate to each other, and is it possible to operate GST with a combination of optical and electrical signals? What are the technical constraints that need to be considered in order to fabricate GST devices that could be operated either optically or electrically? In order to answer these questions, experiments that characterized the optical and electrical responses of GST based nano-devices were performed. It was found that different crystallization mechanisms may have influence in the response, and that the thermal and optical design characteristics of the device play a key role in its operation. Finally a proof of principle, of an opto-electonic memory device that can be read electrically, reset optically and write electrically, is presented. This opens up possibilities for the development of new opto-eloectronic applications such as non-volatile interfaces between future photonics and electronics, high speed optical communication detectors, high speed cameras, artificial retinas and many more.
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3

BARBAGLIA, ANDREA. "ELECTRO-TUNABLE OPTICAL DEVICES FOR MOLECULAR AND CELLULAR STUDIES." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1001750.

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In the present scenario of information technology, researchers are looking for new systems able to deal more efficiently with the increasing amount of information produced by modern society. Nowadays, these tasks are accomplished by CMOS transistors and FLASH memories. Despite their wide implementation, these devices are facing serious issues along their road of development, mainly related to stable operation and power dissipation managing. Advancements in this field could boost the application of artificial intelligence and Big Data analysis, as well as enable new data communication protocols. By taking inspiration from the brain, a very powerful system characterized by low power consumption and high interconnectivity, new proposed devices, such as RRAM memories, aim at overcoming these issues. Properly engineered systems of this typology could act moreover as platforms for more precise and comprehensive biomedical studies. In this thesis, a new class of electro-tunable optical devices is presented in the framework of next-generation memory systems. The model device possesses very favorable characteristics, such as high density and interconnectivity. Moreover, the optical readout, performed by a camera, enables parallel operation. Two realizations of this device concept were studied. The first one is a new configuration for Zero-Mode Waveguides (ZMWs), a well-known nanophotonic system used to perform studies on fluorophore dispersion at the single molecule level. In the proposed device, the interplay of an electric voltage allows to control fluorophore concentration and residence time inside the ZMWs. The light intensity coming from the ZMWs gives information about these two parameters. In the second realization, the developed ZMWs platform is used to perform an optical detection of cardiomyocytes action potentials (APs). The cells are cultured on a thin substrate placed above the fluorophore dispersion. The substrate features an array of pass-through electrodes, which allow the electric APs to be transferred from the cells to the fluorophore dispersion. APs were successfully measured with high SNR. Moreover, the device proved able to detect the effects of a drug administered to the cell culture. This device could find application as a new system for in-vitro electrophysiology, including drugs cardiotoxicity studies. Due to the optical readout scheme, it promises to offer very high spatial resolution, orders of magnitude higher than conventional multi-electrode arrays systems.
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4

Adams, Mitchell Robert. "Dual-Axis Acousto-Optic/Electro-Optic Deflectors in Lithium Niobate for Full-Parallax Holographic Video Displays." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9159.

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A major limitation of acousto-optic (AO) leaky-mode modulator based holographic displays is their inability to present full-parallax. We propose that full-parallax capabilities can be bestowed on these displays by integrating an electro-optic (EO) phased array into the architecture. We validated this concept by rendering computational models and by fabricating and testing a basic two-axis AO/EO deflector prototype in lithium niobate. This was, to our knowledge, the first instantiation of an integrated, hybrid AO/EO deflector. The prototype had a 6° deflection range along the AO-axis, and a 3° deflection range along the EO-axis. A series of models provide us with a clear path forward for optimizing this deflector. They suggest that an AO/EO modulator with an EO deflection range of 24.5° and that requires less than 7.5 V can be fabricated within the limitations of standard photolithography.
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5

Rehioui, Othman Elmehdi. "Fiabilité de diodes laser de forte puissance 808 nm microassemblées pour des applications spatiales : approche expérimentale et modélisations par éléments finis." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14275/document.

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Ces travaux de thèse ont pour objectif de proposer une nouvelle technique de caractérisation électro-optique de barrettes de diodes Laser de puissance (DLPs), au niveau émetteur individuel à partir d'un banc dédié, utilisées pour le pompage optique à 808nm de système LIDAR en environnement spatial et en régime QCW. Après une étude métrologique fine, ils décrivent une méthodologie de sélection d'un indicateur précoce de défaillance potentielle et sa capacité à estimer la fiabilité de DLPs en conditions opérationnelles (> 109 impulsions à 100Hz/200µs). L’analyse de la dégradation des DLPs se base sur l'identification de signatures paramétriques de défaillance mises en lumière après une série de tests accélérés ciblés et relatives à l'évolution de la puissance optique, du spectre optique (λmax) et du degré de polarisation (DOP) de chaque émetteur de la barrette. Nous montrons également la forte complémentarité entre la mesure du DOP par électroluminescence et par photoluminescence et nous proposons une méthodologie de sélection précoce des émetteurs en considérant leur localisation dans le plan (λmax, DOP). Ces études expérimentales, confortées par des simulations thermiques et mécaniques par éléments finis en introduisant un grand nombre de paramètres technologiques, ont permis de quantifier les niveaux de contraintes résiduelles dans les DLPs en fonction de différentes configurations d'assemblage et d'établir un lien avec leur fiabilité intrinsèque
This thesis work aimed to propose a new methodology for electro-optical characterization ofQCW laser diodes array (LDA) at emitter level by using a dedicated test bench. After detailedmetrological study, a methodology for selecting an early failure indicator and its ability to assess theLDA reliability in operational conditions (> 109 Shots at 100Hz/200μs) has been described. The LDAdegradation analysis were based on identification of parametric failure signatures highlighted after aset of accelerated tests and have been focused on the evolution of optical power, optical spectrum(λmax) and the degree of polarization (DOP) of each emitter on the LDA. We also explain the strongcomplementarity between the measured DOP of photoluminescence and the DOP ofelectroluminescence and a methodology for early selection of emitters have been proposed by takinginto account their location in the plane (λmax, DOP). These experimental studies were comforted bythermal and mechanical finite element simulations, by introducing several technological parameters inorder to quantify levels of induced mechanical stresses in LDA under different assemblyconfigurations and to establish the link with their intrinsic reliability
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6

HUI, CHEN YI, and 陳宜慧. "A Model Establishment of New Product Development in Electro-optical Industry~A Case Study of the Electro-optical System Supplier." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/22900550471398930638.

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Анотація:
碩士
國立臺北大學
企業管理學系
92
Step into the 21st century, you can sense the power of globalization and unlimited business potentials. With the rapid growth of Electro-Optical technology, IA product concept is invented. Developing new products has become the motivation in Electro-optical industry. For example, developing new products will enhance productively, competition and economy growth for the country. Next, developing new products will also be the source of making profits, creating enterprise images and adopting marketing strategies. Furthermore, developing new products will make consumer’s life more convenient and improve their quality of life. Therefore, NPD is an important issue to increase competition between countries, create business core competitively and change consumer’s life style. Crawford（2000）thinks the effect of developing new products is a high range of failure and damage risks. IA product accelerates the speed of updating. Due to the information of products is widely available, updating products and organizing key components are made to provide consumers with better products within a short time. By doing it, market share in the industry is gained. This study focuses on whether is it helpful to develop a new modal with the help of optical System Suppliers. If it is helpful, it will provide the suppliers with more market competition opportunity. Enterprises always face some uncertain factors in NPD. The key factor of NPD is to develop products that are highly acceptable in the market through cost controlling and timing. There are two reasons to conduct this study. First, create a system that is suitable for optical operation suppliers based on customer’s demands by adopting the theory of NPD written by Crawford. Control the life cycle of NPD and adopt it on the new products to reach the maturity. Next, test the credibility of the theory by randomly selecting famous suppliers and products. Find out the difference between Optical suppliers and NPD to estimate the value of this study. In conclusion, brand manufactures focus on market analysis and the making of products. It’s highly flexible and practical by putting Electro-optical system supplier on theory. On the contrary, ODM/OEM business emphasizes on R&D. New products depend on customer’s demands. If the product’s life cycle is short, it is more competitive. The product will suit the customer’s demands because of it’s novelty.
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7

(8803139), Yubo Sun. "An Experimentally-Validated Coupled Opto-thermal-electrical Model for PV Performance and Reliability." Thesis, 2020.

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Анотація:
Photovoltaics (PV) are a renewable energy technology experiencing rapidly increasing commercial adoption today. Nonetheless, many proposed PV applications still require higher efficiencies, lower costs and comparable reliability to currently available in commercial devices (typically made from silicon). To enable the rigorous study of a much wider range of materials and novel design concepts, particularly those based on compound thin films, Concentrated Photovoltaics (CPV), cells with bifaciality, a comprehensive modeling framework is developed to couple photon absorption, carrier transport, photon recycling, and thermal transport in PV devices. The universality of this framework manifest itself in approaching various PV related problems as follows: 1) exploring the novel design of wide-Eg GaInP solar cells as an intermediate step to enhance the efficiency of multijunction PV devices; 2) characterizing the open-circuit voltage (VOC) degradation in thin-film vapor liquid solid (TF-VLS) grown InP solar cell through combined device and circuit model for interpreting photoluminescence (PL) image; 3) establishing optic-electric-thermal coupled framework to assess and compare the passive cooling effect for Silicon CPV devices that employ porous soda-lime glass radiative cooler and conventional copper cooler respectively; 4) Investigating and formulating the analytic solution of the optimal design that minimizes combined optical shadowing loss and electrical resistive loss for two types of bifacial PV devices: a) interdigitated back contact (IBC) Silicon heterojunction (SHJ) solar cells and b) Copper Indium Gallium DiSelenide (CIGSe) solar cell with Al2O3 passivation; and 5) Constructing an Neural Network Autoen- coder (NNA) that compresses and reconstructs the J-V characteristics obtained from TCAD simulation and literature for rapid screening and automated classification.
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8

Chang, Chieh-Po, and 張介柏. "Polychromatic Electro-Optical Pattern Recognition System with Liquid Crystal Spatial Light Modulator Based on Color Human Vision Model." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/42763148924604610483.

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Анотація:
碩士
元智大學
光電工程研究所
96
People consider that ATD color model is the most to be close to human eyes. In this thesis, we apply ATD color model to multi-channel nonzero order joint transform correlator and perform pattern recognition. To estimate whether ATD color model is suitable for pattern recognition, we utilize the multi-level quantized reference functions to discuss the effect of pattern recognition. Furthermore, we compare with RGB, which is common used to perform pattern recognition. The terms of estimation contain recognition ability of rotational distortion, brightness performance, effect of multi-level quantized reference functions, noise tolerance ability, recognition ability of realistic background, and relationship between channels and channels. We utilize peak to correlation energy, peak to sidelobe ratio, correlation peak intensity, and mutual correlation coefficient as our performance evaluation parameters. Finally, the results show that ATD color model is suitable for pattern recognition.
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9

Chi, Cheng-Yu, and 紀承諭. "Prospective Blue Phase Liquid Crystal Display (BP-LCD) Development Using Physical Director Model for Electro-Optical Properties of Kerr Effect." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ef3yyh.

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Анотація:
博士
國立臺灣大學
電子工程學研究所
105
Blue phase liquid crystal is the liquid crystal molecule with the lattice structure of double twist cylinder. When an electric field is applied, its electro-optical effect induces birefringence-the so-called Kerr effect. We start discussion of Kerr constant changes caused by liquid crystal cell thickness from experiment, which is also an important reference and assistance in the improvement of both the electro-optical properties of blue phase liquid crystal, and furthermore the development of the relevant components of blue phase liquid crystal displays in the next generation. In this study, we take the blue phase liquid crystal cells of different thicknesses to measure the dependency between its phase (φ) and voltage (V) under irradiation of oblique incident light by the driving of the applied vertical electric field. Besides, we use phase formulas to find out birefringence (δ_n) and sort out the formulas related to the Kerr effect. After that, it can be seen that at low electric field, birefringence (δ_n) is linearly related to applied electric field square (E2) so it can be confirmed that theoretical values and experimental data are consistent. Therefore, it is realized that different liquid crystal cell thicknesses also affect Kerr constant changes. Also, this study proposed the director model of blue phase liquid crystal to interpret and analyze the electro-optical properties of the polymer stabilized blue phase liquid crystal (PS-BPLC). Herein, it also simulated by stacking a specific number of nematic liquid crystal and decided the stacked layers of nematic liquid crystal (M_z) fitting to experimental results through regulating the multiple of voltage (M) in this research. This simulation results almost perfectly fit experimental results. The research went on to explore the electro-optical characteristics of the liquid crystal cell in the established models. In addition to the known relationship between induced birefringence and the electric field which can be described by the Kerr effect, it can also be explained by proposed director model. We further discover refractive index changes are linearly related to the angle between liquid crystal molecules, and the direction of the electric field after taking the cosine square. We got the shown electro-optical characteristics under the influence of the Kerr effect in the use of the blue phase simulation software. Through a series of controls of the result and the director model, it is found that the proposed director model is more in line with the actual values. This mathematical physics model can be applied to the development of blue phase displays, which is helpful to the next generation of displays of blue phase liquid crystal and thin film transistor (TFT-BPLC) in the early-stage display design development and pre-verification of new materials; also, it can substantially save the cost of investment in the development of the semiconductor optoelectronic display industry and improve the development efficiency.
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Книги з теми "Electro-optical Model"

1

1947-, Wootton John, ed. Electro-optical systems peformance modeling. Boston: Artech House, 1993.

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2

Chi, Feng, Xi Long, and Qiang Xu, eds. Physical Model and Applications of High-Efficiency Electro-Optical Conversion Devices. Frontiers Media SA, 2022. http://dx.doi.org/10.3389/978-2-88974-232-5.

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3

Wootton, John, and Gary Waldman. Electro-Optical Systems Performance Modeling (Artech House Optoelectronics Library). Artech House Publishers, 1992.

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4

A Comparison of Gyroscope Digital Models for an Electro-Optical/Infrared Guided Missile Simulation. Storming Media, 2003.

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Частини книг з теми "Electro-optical Model"

1

Liberali, Valentino, Franco Maloberti, and Alberto Regini. "Electro-Optical Device Models for Electrical Simulators." In The Kluwer International Series in Engineering and Computer Science, 119–32. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1405-9_9.

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2

"Model-Based Systems Engineering." In Systems Engineering and Analysis of Electro-Optical and Infrared Systems, 161–98. CRC Press, 2015. http://dx.doi.org/10.1201/b18263-6.

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3

Meshginqalam, Bahar, Mohammad Taghi Ahmadi, Hamid Toloue Ajili Tousi, Arash Sabatyan, and Anthony Centeno. "Surface Plasmon Resonance-Based Sensor Modeling." In Handbook of Research on Nanoelectronic Sensor Modeling and Applications, 361–94. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0736-9.ch014.

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Exceptional optical and electrical characteristics of graphene based materials attract significant interest of the researchers to develop sensing center of surface Plasmon resonance (SPR) based sensors by graphene application. On the other hand refractive index calculation of graphene based structures is necessary for SPR sensor analysis. In this chapter first of all a new method for refractive index investigation of some graphene based structures are introduced and then the effect of carrier density variant in the form of conductance gradient on graphene based SPR sensor response is modeled. The molecular properties such as electro-negativity, molecular mass, effective group number and effective outer shell factor of the molecule are engaged. In addition each factor effect in the cumulative carrier variation is explored analytically. The refractive index shift equation based on these factors is defined and related coefficients are proposed. Finally a semi-empirical model for interpretation of changes in SPR curve is suggested and tested for some organic molecules.
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4

Holst, Gerald C. "System Performance Models." In Electro-Optical Imaging System Performance, Sixth Edition. SPIE, 2017. http://dx.doi.org/10.1117/3.2588947.ch17.

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5

"Liquid Crystals: Electro-Optical Modes and Applications." In Encyclopedia of Optical and Photonic Engineering, Second Edition, 1–14. CRC Press, 2015. http://dx.doi.org/10.1081/e-eoe2-120014869.

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6

O'KANE, BARBARA L. "VALIDATION OF PREDICTION MODELS FOR TARGET ACQUISITION WITH ELECTRO-OPTICAL SENSORS." In Vision Models for Target Detection and Recognition, 192–218. WORLD SCIENTIFIC, 1995. http://dx.doi.org/10.1142/9789812831200_0008.

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7

"Electro-optical Modes: Practical Examples of LCD Modeling and Optimization." In Modeling and Optimization of LCD Optical Performance, 91–151. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118706749.ch4.

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8

Palem, V. V. "Processes of Synthesis and Characterization of Silver Nanoparticles with Antimicrobial Action and their Future Prospective." In Materials Research Foundations, 131. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902370-5.

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The discovery of novel therapies is required due to the stark rise in microbial resistance to currently available conventional antibiotics, which poses a significant obstacle to the effective management of infectious diseases. Nanomaterials between 1 and 100 nm in size have recently become effective antibacterial agents. In particular, several classes of antimicrobial nanomaterials and nanosized carriers for antibiotic delivery have demonstrated their efficacy for treating infectious diseases, including antibiotic-resistant ones, in vitro and in animal models. Because of their high surface area-to-volume ratios, these materials can provide better therapy than conventional drugs and have new mechanical, chemical, electrical, optical, magnetic, electro-optical, and magneto-optical properties. So, nanoparticles have been proven to be fascinating in the fight against bacteria. In this chapter, we will go into detail about the various characteristics of microorganisms and how they differ across each strain. The toxicity mechanisms change depending on the stain. Even the effectiveness of nanomaterials to treat different bacteria and their defence mechanisms varies depending on strains, particularly the composition of cell walls, the makeup of the enzymes, and other factors. As a result, a perspective on nanomaterials in the microbial world, a method to combat drug resistance by tagging antibiotics in nanomaterials, as well as predictions for their future in science.
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Koshevoi, Veniamin, Anton Belorus, Ilya Pleshanov, Anton Timchenko, Roman Denisenko, Daniyar Sherimov, and Ekaterina Vodkailo. "Study of Composite Structures Based on a Porous Silicon Matrix and Nanoparticles Ag/Zno Used as Non-Invasive Highly Sensitive Biosensor Devices." In Composite Materials. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.92850.

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In this work composite structures based on a porous silicon were obtained and studied. Porous matrices were formed by electrochemical etching in aqueous solutions of hydrofluoric acid. Based on the obtained substrates, por-silicon (Si)/silver (Ag) and por-Si/zinc oxide (ZnO) composite structures were formed. These composites were functionalized by various methods (electro (E)-, thermo (T)-, electrothermal exposure) as a result of which the structures were modified. When studying the samples by scanning electron microscopy (SEM), it was concluded that silver nanoparticles actively diffused into the pores under these technological modes of functionalization. The por-Si/Ag and por-Si/ZnO composite structures were also studied using the following methods: infrared (IR) spectroscopy and Raman ultrasoft X-ray emission spectroscopy. Also, the photoluminescent characteristics of the samples were studied. Based on the obtained results, it was concluded that functionalization methods actively change the phase composition of structures and the optical properties of composites.
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Тези доповідей конференцій з теми "Electro-optical Model"

1

Arsenault, Roger H., and Steve Tritchew. "Range performance model for electro-optical systems." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Wallace G. Fishell. SPIE, 1999. http://dx.doi.org/10.1117/12.372645.

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Wang, Gang, Hongliang Zhang, Xiaochun Liu, and Zhang Li. "Robust monocular model-based pose tracking of markerless rigid objects." In Electro-Optical Remote Sensing, edited by Gary Kamerman and Ove Steinvall. SPIE, 2018. http://dx.doi.org/10.1117/12.2325139.

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3

Capmany, José, and Carlos R. Fernández-Pousa. "Quantum Blackbox Model for Electro-Optical Phase Modulation." In National Fiber Optic Engineers Conference. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/nfoec.2010.jwa59.

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4

Jagueneau, Olivier, and Yves Klein. "SEISM: scene electro-optical image generator and sensor model." In AeroSense '97, edited by Gerald C. Holst. SPIE, 1997. http://dx.doi.org/10.1117/12.276077.

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Chen, Xuanqi, Zhifei Wang, Yi-Shing Chang, Jiang Xu, Peng Yang, Zhehui Wang, and Luan H. K. Duong. "A Comprehensive Electro-Optical Model for Silicon Photonic Switches." In 2018 IEEE Computer Society Annual Symposium on VLSI (ISVLSI). IEEE, 2018. http://dx.doi.org/10.1109/isvlsi.2018.00024.

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6

Keßler, Stefan, Raanan Gal, and Wolfgang Wittenstein. "TRM4: Range performance model for electro-optical imaging systems." In SPIE Defense + Security, edited by Gerald C. Holst and Keith A. Krapels. SPIE, 2017. http://dx.doi.org/10.1117/12.2262543.

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Pinsky, Ephi, and Ofer Yaron. "Range prediction for color imagers toward a joint TRM and perceptual model." In Electro-Optical Remote Sensing XIV, edited by Gary W. Kamerman and Ove Steinvall. SPIE, 2020. http://dx.doi.org/10.1117/12.2571247.

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8

Iryna, Petrosyuk. "Neuro-fuzzy Model for Image Processing in Electro-optical Applications." In 2006 International Conference - Modern Problems of Radio Engineering, Telecommunications, and Computer Science. IEEE, 2006. http://dx.doi.org/10.1109/tcset.2006.4404501.

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Belenguer-Dávila, Tomás, Angel Luis Valverde Guijarro, Gonzalo Ramos Zapata, and Hugo Laguna Hernandez. "Atmospheric lidar co-alignment sensor: flight model electro-optical characterization campaign." In Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing, edited by Upendra N. Singh and Doina N. Nicolae. SPIE, 2017. http://dx.doi.org/10.1117/12.2278734.

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10

Belfiore, Guido, Mahdi Khafaji, Ronny Henker, and Frank Ellinger. "A compact electro-optical VCSEL model for high-speed IC design." In 2016 12th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2016. http://dx.doi.org/10.1109/prime.2016.7519508.

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Звіти організацій з теми "Electro-optical Model"

1

Shirron, Joseph J., and Thomas B. Giddings. A Comprehensive Model For Performance Prediction of Electro-Optical Systems. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada573120.

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2

Goodson, T., Wang III, and C. H. Dispersion and Dipolar Orientational Effects on the Linear Electro-Absorption and Electro-Optic Responses in a Model Guest/Host Nonlinear Optical System. Fort Belvoir, VA: Defense Technical Information Center, July 1996. http://dx.doi.org/10.21236/ada311120.

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3

McGrath, C. P. Using SeaRad and MODTRAN to Improve the Ocean Background Model of the Electro-Optical Tactical Decision Aid (EOTDA). Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada336500.

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4

Tsay, Si-Chee, Q. J. Ji, Santiago Gasso, and Jeffrey S. Reid. Characterization of Dust Aerosols and Atmospheric Parameters from Space-borne and Surface-based Remote Sensing: Application of Community Radiative Transfer Algorithms to Navy Electro-Optical Models. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada628826.

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Tsay, Si-Chee, Q. J. Ji, Santiago Gasso, and Jeffrey S. Reid. Characterization of Dust Aerosols and Atmospheric Parameters from Space-borne and Surface-based Remote Sensing: Application of Community Radiative Transfer Algorithms to Navy Electro-Optical Models. Fort Belvoir, VA: Defense Technical Information Center, September 2002. http://dx.doi.org/10.21236/ada633993.

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