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SSRN 2022年

作者： Cao, Fengyin Huang, Xinpeng An, Ping Yang, Chao Shanghai Institute for Advanced Communication and Data Science School of Communication and Information Engineering Shanghai University Shanghai200444 China Key Laboratory for Advanced Display and System Application Ministry of Education Shanghai200072 China

To alleviate the spatial-angular trade-off in light fields (LFs), LF super-resolution (SR) has been studied. Most of current methods only concern limited relations in LFs, which leads to the insufficient exploitation of the multi-dimensional information. To address this issue, we present a multi-models framework for LFSR in this paper. Models which embody LF from distinct aspects are integrated to constitute the framework. Therefore, the number and the arrangement of these models and the depth of each model determine the framework’s performance, we make the comprehensive analysis on these factors to reach the best result. However, models in the framework are isolated to each other as the unique inputs are required. To tackle this issue, the representation alternate convolution (RAC) is introduced. As the fusion is conducted through the RAC, the multi-dimensional information in LFs is fully exploited. Experimental results demonstrate that our method achieves superior performance against state-of-the-arts techniques. © 2022, The Authors. All rights reserved.

关键词： Convolution

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Local fractional Fourier's transform based on the local fractional calculus

Local fractional Fourier's transform based on the local frac...

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International Conference on Electrical and Control Engineering, ICECE 2010

作者： Yang, Xiaojun Kang, Zongxm Liu, Changhe Shanghai TAYEE Electric Co. Ltd. Beimin Road 101 Chedun Town Songjiang District Shanghai 201611 China School of Mechanics and Civil Engineering China University of Mining and Technology Xuzhou Jiangsu 221116 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200072 China

A new modeling for the local fractional Fourier's transform containing the local fractional calculus is investigated in fractional space. The properties of the local fractional Fourier's transform are obtained... 详细信息

ISBN: (纸本)9780769540313

关键词： Fourier transforms

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Chlorine-substituted chiral 2D perovskite microwires with enhanced lattice rigidity for sensitive circularly polarized light detection

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Science China Chemistry 2023年第12期66卷 3602-3610页

作者： Meng Yuan Yuchen Qiu Yingjie Zhao Yuyan Zhao Hui Li Xiao Wei Gaosong Chen Jiangang Feng Hanfei Gao Jinjin Zhao Jiahui Zhao Lei Jiang Yuchen Wu Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China College of Chemistry Zhengzhou UniversityZhengzhou 450001China College of Chemistry Jilin UniversityChangchun 130012China Key Laboratory for Special Functional Materials of Ministry of Education National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117585Singapore Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China Ji Hua Laboratory Foshan 528000China Department of Physics Shanxi Datong UniversityDatong 037009China

Chiral two-dimensional(2D) perovskites offer numerous attractive features for optoelectronics owing to their soft, deformable lattices and a high degree of chemical tunability. While tremendous advances have been made in perovskite-based direct circularly polarized light(CPL) detection, the low circular polarization anisotropy factor and sensitivity of those photodetectors arising from large lattice distortion still limit practical applications. Herein, chiral 2D perovskite-based single-crystalline microwire arrays with enhanced circular dichroism(CD) absorption are fabricated with the synergy of the capillary-bridgeconfined assembly method and chlorine-substituted phenethylamine(Cl-MBA). Compared with phenethylamine(MBA)-inserted perovskites, the smaller lattice distortion and increased halogen–halogen interaction within Cl–MBA-inserted perovskites strengthen lattice rigidity and weaken electron–phonon coupling to improve carrier transport and thermal stability, resulting in high-performance CPL photodetectors with an anisotropy factor of 0.25, responsivity exceeding 95.7±9.3 A W^(-1)and detectivity exceeding(3.05±0.30)×10^(13)Jones. This work opens a new perspective to modulate circular polarization sensitivity and will be helpful to realize promising implementations in quantum computation and communication.

关键词： chiral perovskites microwire arrays lattice rigidity circular polarization photodetectors

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Compact Printed Monopole Antenna on Liquid Crystal Polymer (LCP) for EWB applications

Compact Printed Monopole Antenna on Liquid Crystal Polymer (...

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2008 International Conference on Microwave and Millimeter Wave Technology(2008国际微波毫米波技术会议)

作者： Xiao-Rong Yan Shun-Shi Zhong Xia Zhang School of Communication and Information Engineering Shanghai Universityyanxr2003 *** Shanghai 2 School of Communication and Information Engineering Shanghai Universityyanxr2003 *** Shanghai 2 Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT CenterShang

A compact tapered CPW-fed hollowed printed monopole antenna on the liquid crystal polymer (LCP) substrate with an extremely wide bandwidth (EWB) is introduced. The simulated results demonstrate that this antenna achieves an impedance bandwidth from 0.435GHz to 14.52GHz (33:1) for VSWR≤,and exhibits a nearly omnidirectional radiation pattern,while its area is only about 0.18λ1×0.13λ1,where λ1 is the wavelength of the lowest operating frequency.

关键词： Liquid crystal polymers Bandwidth Impedance Frequency Antenna radiation patterns Coplanar waveguides Packaging Computational modeling Broadband antennas Costs

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High Performance All Oxide Thin Film Transistor With Ink-Jet Printing Metal Oxide Dielectric Pattern

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SSRN 2024年

作者： Zhao, Zexian Gui, Zhenghao Xu, Meng Zou, Kefeng Chen, Longlong Li, Xifeng Zhang, Jianhua School of Materials Science and Engineering Shanghai University Shanghai200444 China Key Laboratory of Advanced Display and System Application of Ministry of Education Shanghai University Shanghai200072 China

In this paper, the effect of the printing parameters on the forming behavior of dot, line and plane for hafnium aluminum oxide (HAO) is thorough investigated by simulation and experiment. At first, the spreading process of inkjet droplets has been numerically simulated through the utilization of the volume of fluid (VOF) model. And the optimal contact angle and drop space for printing HAO pattern were obtained. Ultrasonic treatment can remove some polar hydrophilic molecules on the surface of the substrate, which controlled the spread of the printed patterns. The inkjet-print HAO film exhibits the permittivity of 9.3 at 100kHz and afforded a leakage current below 10-6 A/cm2 at 2 MV. Finally, the fabricated TFTs using inkjet print exhibit mobility (μ) of 8.89 cm2v-1s-1, subthreshold swing (SS) of 0.09 V/decade and ON-OFF-current ratio (Ion/Ioff) of 8.69×108. Implied that the ultrasonic treatment can serve as guidelines for high quality printing pattern. © 2024, The Authors. All rights reserved.

关键词： Morphology

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An Adaptive Fractional Pixel Search Algorithm

An Adaptive Fractional Pixel Search Algorithm

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International Conference on Intelligent Sensing and Information Processing (ICISIP)

作者： Liquan Shen Zhaoyang Zhang Zhi Liu Wenjun Zhang Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China Institute of Image Communication& Information Processing Shanghai Jiaotong University China

In this paper, we propose an adaptive fractional pixel search algorithm for reduction computation its load. Based on that SAD (sum of absolute difference) error surface is unimodal within the range of plusmn1 pixel, a novel fractional pixel search bypass strategy is first proposed; Then, a strategy of fractional pixel search early termination based on all-zero block detection is proposed. Finally, an adaptive fractional pixel search algorithm adopting above strategies and improved CBFPS (center biased fractional pixel search) algorithm is proposed. Compared with the fractional pixel full search algorithm and JVT-F017 that adopts CBFPS, simulation results show that the proposed algorithm can reduce 76.60% and 68.22% fractional pixel search points respectively while it still maintains similar coding efficiency.

关键词： Motion estimation Vectors Video coding Testing Paramagnetic resonance Pixel Image communication Information processing Computer displays Redundancy

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Microstructures of ZnO electrospun nanofibers on AZO glass

Microstructures of ZnO electrospun nanofibers on AZO glass

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The 2014 International Conference on Materials Science and Engineering Technology(MSET 2014)

作者： Xiuzhen Lu Yanyan Chang Mingtao Xu Bo Peng Key Laboratory of Advanced Display and System Applications Ministry of Education andSMIT CenterSchool of Mechatronic Engineering and AutomationShanghai University

ISBN: (纸本)9783038351023

ZnO electrospun nanofibers were considered to be potential novel materials in applications of photovoltaic devices and sensorsAZO glass was usually used in those devices as transparent electrodesZnO nanofibers on AZO glass were synthesized by electrospinning and calcination processScanning electron microscopy(SEM), transmission electron microscopy(TEM), Raman spectroscopy and photoluminescence(PL) spectrum was employed to investigate the morphology, structure and optical performance of ZnO nanofibersNetwork structure composed of sheet ZnO was observedRaman spectra and PL spectrum indicated the existence of defect states in the ZnO nanofibers.

关键词： ZnO nanofibers electrospinning AZO glass

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Anti-Blue Light and Hydrophobic Composite Film Based on Iron Oxide and Fas-Modified Sio2

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SSRN 2024年

作者： Zhang, Jianhua Yu, Jiaqi Wu, Xingyang Qiao, Weidong Wang, Hongdong Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai200444 China School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China

With the wide application of display and lighting devices, the potential injury to human eyes due to the blue light has been attracting significant attention. While current anti-blue light films are complex, costly and low stability in humid environments. In this work, anti-blue light films were fabricated using iron oxide as blue light absorbent and polyvinylpyrrolidone as surfactant, under different Fe3+ concentrations and annealing temperatures. The films exhibited average 60% absorption of blue light in 400-450 nm wavelength range and maintained 96% transmittance within 500-800 nm. Moreover, to improve the hydrophobicity, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS)-modified SiO2 (FASS) hydrophobic layer was deposited onto the iron oxide films to obtain the composite iron oxide/FASS films. The composite films remained transmittance almost unchanged after 15 days at 85 °C and 85% relative humidity. Also, cell experiments proved that the composite films could protect human retinal pigment epithelium cells from blue light injury. Moreover, the color rendering index of the display screen remained almost unchanged after covered with the composite film, while the blue light-weighted radiance was reduced significantly. © 2024, The Authors. All rights reserved.

关键词： Iron oxides

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An analysis on damage of light-emitting diodes reliability induced by electronic static discharge

An analysis on damage of light-emitting diodes reliability i...

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International Conference on Electronic Packaging Technology

作者： Tingting Nan Piaopiao He Luqiao Yin Jianhua Zhang School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education

ISBN: (纸本)9781509013975

The influence of different degrees of high reverse-bias stress on high power light-emitting diodes (LEDs) was investigated based on the aging of LED devices under the stress of 85℃/85% RH. GaN-based blue LEDs were respectively tested by negative Human-Body-Mode (HBM) electronic static discharge (ESD) at -1000 V, -2000 V, -3000 V, -4000 V and -5000 V. The electrical performances and optical performances of samples were measured before and after ESD test. The LEDs stressed at -1000 V, -2000 V and -3000 V showed a soft breakdown due to the generation of defect inside the chip and LEDs stressed at -4000V and -5000V showed a thermal breakdown. The thermal breakdown made temperature rise rapidly and formed a melting channel, which caused the damage of the LED. Though the electrical performances and optical performances of LEDs stressed at -1000 V, -2000 V and -3000 V did not show conspicuous degradation, the damage induced by ESD affect the reliability of LEDs.

关键词： LED ESD Aging Reliability

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The effect of thermal cycling on nanoparticle reinforced composite lead-free solder

The effect of thermal cycling on nanoparticle reinforced com...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Si Chen Zhaonian Cheng Johan Liu Yulai Gao Qijie Zhai Key Laboratory of Advanced Display and System Applications & SMIT Center School of Automation and Mechanical Engineering Shanghai University Shanghai China SMIT Center & Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden School of Materials Science and Engineering Shanghai University Shanghai China

The effects of thermal cycling on shear strength and fracture mode of the nanosized Sn-3.0Ag-0.5Cu particulates reinforced Sn-58Bi composite solder were investigated in this paper. By using a self developed top-down method named Consumable-electrode Direct Current Arc technique, the Sn-3.0Ag-0.5Cu nanoparticles were successfully manufactured. The primary particle size of Sn-3.0Ag-0.5Cu nanoparticles ranged from 20nm to 80nm. Sn-3.0Ag-0.5Cu nanoparticles with different weight percentages were mixed into commercial Sn-58Bi solder paste in order to develop a composite solder paste which is lead-free and possess high strength and low melting point. Following the conventional surface-mount technology process, the 1206 chip resistor and ENIG/Cu pad were joined by the composite solder. Scanning electron microscope, transmission electron microscope and optical microscope were employed to observe the morphology of nanoparticles, microstructure of solder matrix, fracture mode after shear test and crack after thermal cycling. The experimental results indicated that before thermal cycling all composite solders' shear strength increased greatly compared to Sn-58Bi solder making them comparable to Sn-3.0Ag-0.5Cu solder. The fracture surfaces of all composite solder joints occurred at the interface between the solder matrix and the resistor termination. After thermal cycling, the shear strength of the composite solders was at a constant value. However, when the weight percentages of Sn-3.0Ag-0.5Cu nanoparticles exceeded a certain value, the shear strength of composite solder joints decreased rapidly and the case of solder brittle fracture increased as the nanoparticles content increased.

关键词： Environmentally friendly manufacturing techniques Lead Nanoparticles Optical microscopy Scanning electron microscopy Transmission electron microscopy Resistors Soldering Surface-mount technology Electron optics

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