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Foveated rendering:A state-of-the-art survey

Computational Visual Media 2023年第2期9卷 195-228页

作者： Lili Wang Xuehuai Shi Yi Liu State key laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100000China Peng Cheng laboratory Shengzhen 518000China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100000China.

Recently,virtual reality(VR)technology has been widely used in medical,military,manufacturing,entertainment,and other *** applications must simulate different complex material surfaces,various dynamic objects,and complex physical phenomena,increasing the complexity of VR *** computing devices cannot efficiently render these complex scenes in real time,and delayed rendering makes the content observed by the user inconsistent with the user’s interaction,causing *** rendering is a promising technique that can accelerate *** takes advantage of human eyes’inherent features and renders different regions with different qualities without sacrificing perceived visual *** rendering research has a history of 31 years and is mainly focused on solving the following three *** first is to apply perceptual models of the human visual system into foveated *** second is to render the image with different qualities according to foveation *** third is to integrate foveated rendering into existing rendering paradigms to improve rendering *** this survey,we review foveated rendering research from 1990 to *** first revisit the visual perceptual models related to foveated ***,we propose a new foveated rendering taxonomy and then classify and review the research on this ***,we discuss potential opportunities and open questions in the foveated rendering *** anticipate that this survey will provide new researchers with a high-level overview of the state-of-the-art in this field,furnish experts with up-to-date information,and offer ideas alongside a framework to VR display software and hardware designers and engineers.

关键词： foveated rendering virtual reality(VR) real-time rendering

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Heavy metal complex containing organic/polymer materials for bulk-heterojunction photovoltaic devices

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Chinese Chemical Letters 2016年第8期27卷 1250-1258,1467页

作者： Ya-Nan Liu Shi-Fan Wang You-Tian Tao Wei Huang key laboratory of Flexible Electronics & Institute of Advanced materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University

The application of heavy-metal complexes in bulk-heterojunction（BHJ） solar cells is a promising new research field which has attracted increasing attention,due to their strong spin-orbit coupling for efficient singlet to triplet intersystem *** review article focuses on recent advances of heavy metal complex containing organic and polymer materials as photovoltaic donors in BHJ solar ***-acetylide containing oligomersor and polymers have been firstly illustrated due to the good solubility,square planar structure,as well as the fairly strong Pt-Pt *** the cyclometalated Pt or Ir complex containing conjugated oligomers and polymers are presented in which the triplet organometallic compounds are embedded into the organic/polymer backbone either through cyclometalated main ligand or the auxiliary *** triplet small molecular cyclometalated Ir complex are also briefly *** the chemical modification,physical doping of cyclometalated heavy metal complexes as additives into the photovoltaic active layers is finally demonstrated.

关键词： Platinum complex Iridium complex Bulk-heterojunction Photovoltaic devices Organic/polymer solar cells Triplet

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Evaluation of Pulsed Laser Deposited Li4Ti5O12 Thin Film Anodes by CV and EIS

Evaluation of Pulsed Laser Deposited Li4Ti5O12 Thin Film Ano...

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中国材料大会2012

作者： Jianqiu Deng Zhouguang Lu Chiyuen Chung Zhongmin Wang Huaiying Zhou Guangxi key laboratory of information materials Guilin University of Electronic Technology School of material Science and Engineering Guilin University of Electronic Technology Department of Physics & materials Science City University of Hong Kong

ISBN: (纸本)9783037856062

Li4Ti5O12 thin film anodes were prepared successfully using pulsed laser deposition technique. The thin films were characterized by X-ray diffraction and environmental scanning electron microscopy. The effects of thickness and scan rate on the electrochemical properties of Li4Ti5O12 thin film electrodes were discussed in detail. The thin film anodes deliver favorable capacity and excellent cycling performance. The discharge capacity maintains at 141 mAhg-1 after 20 cycles at 1C charge-discharge rate for the thin film anodes deposited for 20 minutes. The charge-transfer resistances were also investigated by electrochemical impedance spectroscopy.

关键词： Rechargeable lithium ion batteries Lithium titanate Thin film electrode Cyclic voltammetry

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Real-time programmable metasurface for terahertz multifunctional wave front engineering

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Light(Science & Applications) 2023年第9期12卷 1795-1806页

作者： Feng Lan Luyang Wang Hongxin Zeng Shixiong Liang Tianyang Song Wenxin Liu Pinaki Mazumder Ziqiang Yang Yaxin Zhang Daniel M.Mittleman Sichuan THz Communication Technology Engineering Research Center School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313000China Zhangjiang laboratory Shanghai 201204China National key laboratory of Solid-State Microwave devices and Circuits Hebei Semiconductor Research InstituteShijiazhuang 050051China Aerospace information Research Institute Chinese Academy of SciencesBeijing 100094China University of Chinese Academy of Sciences School of ElectronicElectrical and Communication EngineeringBeijing 101408China Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMI 48109USA School of Engineering Brown UniversityProvidenceRI 02912USA

Terahertz(THz)technologies have become a focus of research in recent years due to their prominent role in envisioned future communication and sensing *** of the key challenges facing the field is the need for tools to enable agile engineering of THz wave ***,we describe a reconfigurable metasurface based on GaN technology with an array-of-subarrays *** subwavelength-spaced array,under the control of a 1-bit digital coding sequence,can switch between an enormous range of possible configurations,providing facile access to nearly arbitrary wave front control for signals near 0.34 *** demonstrate wide-angle beam scanning with 1°of angular precision over 70 GHz of bandwidth,as well as the generation of multi-beam and diffuse wave fronts,with a switching speed up to 100 *** device,offering the ability to rapidly reconfigure a propagating wave front for beam-forming or diffusively scattered wide-angle coverage of a scene,will open new realms of possibilities in sensing,imaging,and networking.

关键词： wave scattered arbitrary

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56 Gb/s direct-detection polarization multiplexing multi-band CAP transmission

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Chinese Optics Letters 2015年第8期13卷 14-17页

作者：王智鑫陶理王一光迟楠 key laboratory for information Science of Electromagnetic Waves Ministry of Education Department of Communication Science and Engineering Fudan University National Engineering Research Center for Broadband Networks and Applications

Carrierless amplitude and phase （CAP） modulation is generating increasing interest for short-reach optical com- munications. Polarization multiplexing （PolMux） is a good way to improve the CAP system＇s data rate further with the limited bandwidth of electrical devices. In this Letter, we experimentally demonstrate a 56 Gb/s directdetection PolMux CAP system over a 15 km fiber link for the first time, to our best knowledge. Two-band CAP modulation with different modulated orders for each band is employed. An optical filter at the receiver is utilized to realize the polarization separation. No extra digital signal processing for polarization-dependent distortion is required.

关键词： Modulation Multiplexing Optical communication Signal processing

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Robust Beamforming for Secured Wireless Power Transfer in MIMO Magnetic Resonant Coupling System:A Probabilistic Approach

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China Communications 2019年第1期16卷 97-107页

作者： Ling Xing Kaikai Deng Feifei Gao School of information Engineering Henan University of Science and Technology Institute for Artificial Intelligence Tsinghua University(THUAI) State key Lab of Intelligent Technologies and Systems Tsinghua University Beijing National Research Center for information Science and Technology(BNRist) Department of Automation Tsinghua University

Wireless power transfer(WPT) to support mobile and portable devices is an emerging wireless *** all kinds of approaches,magnetic resonance coupling(MRC) is an excellent one for mid-range WPT,which provides better mobility,flexibility,and convenience due to its simplicity in hardware implementation and longer transmission *** this paper,we consider an MRCWPT system with multiple power transmitters,one intended power receiver and multiple unintended power *** investigate the probabilistic robust beamforming designs and provide efficient algorithms to achieve the local optimums under two different criteria,i.e.,total source power minimization problem and min-max unintended receiving power restriction *** the problems are quite typical in robust design situations,our proposed robust beamformers can be conveniently applied to other probabilistic robust design problems,thus reduce the complexity as well as improve the beamforming *** results demonstrate that the proposed algorithms can significantly improve the performance as well as the robustness of the WPT system.

关键词： magnetic resonance coupling wireless power transfer beamforming probabilistic robustness power security

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Inhibition Mechanism of Hydroxyproline-like Small Inhibitors to Disorder HIF-VHL Interaction by Molecular Dynamic Simulations and Binding Free Energy Calculations

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Chinese Journal of Chemical Physics 2021年第6期34卷 814-824,I0003,I0079-I0088页

作者： Mingsong Shi Xin Zhou Yao Cai Penghui Li Dengxue Qin Xinrong Yan Meng Du Shuo Li Dingguo Xu State key laboratory of Biotherapy West China Hospital of Sichuan UniversityChengdu 610041China College of Chemistry Sichuan UniversityChengdu 610064China Research Center for material Genome Engineering Sichuan UniversityChengdu 610065China

Protein-protein interactions are vital for a wide range of biological *** interactions between the hypoxia-inducible factor and von Hippel Lindau(VHL)are attractive drug targets for ischemic heart *** order to disrupt this interaction,the strategy to target VHL binding site using a hydroxyproline-like(pro-like)small molecule has been *** this study,we focused on the inhibition mechanism between the pro-like inhibitors and the VHL protein,which were investigated via molecular dynamics simulations and binding free energy *** was found that pro-like inhibitors showed a strong binding affinity toward *** free energy calculations and free energy decompositions suggested that the modification of various regions of pro-like inhibitors may provide useful information for future drug design.

关键词： Von Hippel Lindau Hypoxia-inducible factor Inhibitor Molecular dynamics simulation Binding free energy

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Composition and luminescence properties of highly robust green-emitting LuAG:Ce/Al_(2)O_(3)composite phosphor ceramics for high-power solid-state lighting

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Journal of Advanced Ceramics 2023年第3期12卷 625-633页

作者： Ziqiu Cheng Xin Liu Xinrong Chen Jian Xu Yanbin Wang Tengfei Xie Lexiang Wu Zhengfa Dai Guohong Zhou Jun Zou Jiang Li Transparent Ceramics Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Lab of New Energy materials and devices School of Physics and Electronic InformationHenan Polytechnic UniversityJiaozuo 454000China School of material Science and Engineering Jiangsu University301 Xuefu RoadZhenjiang 212013China Shanghai Institute of Technology Shanghai 201418China Institute of New materials&Industrial Technology Wenzhou UniversityWenzhou 325024China

The major advantage of laser lighting over white light-emitting-diode is the possibility to achieve ultra-high ***,phosphors usually suffer laser-induced luminescence saturation,which limits the peak luminance of laser lighting *** aim of the present study is to develop LuAG:Ce/Al_(2)O_(3)composite ceramics(LACCs)with a high saturation threshold for high-luminance laser *** to the rigid crystal structure,proper synthetic process,and optimized thermal design,the LACCs possess small thermal quenching(16%loss in luminescence at 225℃),high quantum yield(>95%),and excellent luminescence *** the LACCs are irradiated by blue laser diodes in a reflection mode,a high luminous flux of 4634 lm and luminous efficacy of 283 lm·W^(−1)are ***,they show no sign of luminescence saturation even when the power density reaches 20.5 W·mm^(−2).With these favorable properties,the designed LACCs show great potential in high-luminance laser lighting.

关键词： LuAG:Ce/Al_(2)O_(3)composite ceramics(LACCs) luminescence saturation luminous efficacy high-luminance laser lighting

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碱金属掺杂对CIGS薄膜及电池器件的影响

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Engineering 2017年第4期3卷 51-66页

作者：孙云林舒平李伟程世清张运祥刘一鸣刘玮 Tianjin key laboratory of Thin Film devices and Technology College of Electronic Information and Optical Engineering Nankai University

本文总结了Cu（In,Ga）Se;（CIGS）电池中掺杂碱金属的发展历史和一些重要成果,综述了碱金属掺杂方式对CIGS吸收层及器件性能的影响。通过分析由（NaF+KF）-PDT导致的CIGS表面结构及电学性能的改变,我们提出并解释了如下几个问题:（1）... 详细信息

本文总结了Cu（In,Ga）Se;（CIGS）电池中掺杂碱金属的发展历史和一些重要成果,综述了碱金属掺杂方式对CIGS吸收层及器件性能的影响。通过分析由（NaF+KF）-PDT导致的CIGS表面结构及电学性能的改变,我们提出并解释了如下几个问题:（1）在低温沉积CIGS薄膜过程中,Na促进了CuInSe;的优先形成,排挤Ga向Mo衬底扩散,造成CIGS薄膜的分层现象;（2）Na原子钝化CIGS晶界及表面缺陷从而提高空穴载流子浓度的相关机制;（3）过渡层减薄提高了短路电流(J;)而不产生开路电压(V;)损失,这不仅归因于化学浴沉积初期过渡层较好的包覆性,还在于受主缺陷V;–转型为施主缺陷Cd;时密度的增加,强化了同质浅埋结;（4）(NaF+KF)-PDT使CIGS吸收层表面价带降低,进一步抑制了CIGS吸收层和过渡层界面的复合,是提高电池开路电压与填充因子的重要原因。

关键词：碱金属 Cu(In,Ga)Se2 薄膜太阳能电池 PDT

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Broadband athermal waveguides and resonators for datacom and telecom applications

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Photonics Research 2018年第11期6卷 987-990页

作者： LIUQING HE YUHAO GUO ZHAOHONG HAN KAZUMI WADA JURGEN MICHEL ANURADHA M.AGARWAL LIONEL C.KIMERLING GUIFANG LI LIN ZHANG key laboratory of Opto-electronic information Technical Science of Ministry of Education School of Precision Instruments and Opto-electronics Engineering Tianjin University key laboratory of Integrated Opto-electronic Technologies and devices in Tianjin School of Precision Instruments and Opto-electronics Engineering Tianjin University Department of materials Science and Engineering Massachusetts Institute of Technology Department of materials Engineering University of Tokyo College of Optics and Photonics CREOL and FPCE University of Central Florida

The high-temperature sensitivity of the silicon material index limits the applications of silicon-based micro-ring resonators in integrated photonics. To realize a low but broadband temperature-dependent-wavelength-shift microring resonator, designing a broadband athermal waveguide becomes a significant task. In this work,we propose a broadband athermal waveguide that shows a low effective thermo-optical coefficient of1 × 10^(-6)∕K from 1400 to 1700 nm. The proposed waveguide shows a low-loss performance and stable broadband athermal property when it is applied to ring resonators, and the bending loss of ring resonators with a radius of >30 μm is 0.02 dB/cm.

关键词： TOC telecom applications TiO SiO

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