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A cache-friendly sampling strategy for texture-based volume rendering on GPU

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Visual Informatics 2017年第2期1卷 92-105页

作者： Junpeng Wang Fei Yang Yong Cao The Ohio State University ColumbusOH 43210USA NVIDIA semiconductor technology(shanghai)co. Ltd.ShanghaiChina The Boeing co.pany North CharlestonSC 29418USA

The texture-based volume rendering is a memory-intensive *** performance relies heavily on the performance of the texture ***,most existing texture-based volume rendering methods blindly map co.putational resources to texture memory and result in inco.erent memory access patterns,causing low cache hit rates in certain *** distance between samples taken by threads of an atomic scheduling unit(e.g.a warp of 32 threads in CUDA)of the GPU is a crucial factor that affects the texture cache *** on this fact,we present a new sampling strategy,called Warp Marching,for the ray-casting algorithm of texture-based volume *** effects of different sample organizations and different thread-pixel mappings in the ray-casting algorithm are thoroughly ***,a pipeline manner co.or blending approach is introduced and the power of warp-level GPU operations is leveraged to improve the efficiency of parallel executions on the *** addition,the rendering performance of the Warp Marching is view-independent,and it outperforms existing empty space skipping techniques in scenarios that need to render large dynamic volumes in a low resolution *** a series of micro-benchmarking and real-life data experiments,we rigorously analyze our sampling strategies and demonstrate significant performance enhancements over existing sampling methods.

关键词： Warp marching Texture cache hit rate GPU Volume rendering

Overview of SOI materials technology in China

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Nuclear Science and Techniques 2005年第6期16卷 330-334页

作者： CHEN Meng WANG Xi LIN Cheng-Lu shanghai Simgui technology co. Ltd 200 Puhui Road Jiading Shanghai 201821 shanghai Institute of Microsystem and Information technology the Chinese Academy of Sciences 865 Changning Road Shanghai 200050

In recent years, novel structure SOI materials have been fabricated successfully. Also, SiGeOI (SGOI)material, an ideal substrate for realizing strained-silico. structures, has been investigated by modified SIMOX *** 2002, the 100 mm, 125 mm and 150 mm SIMOX wafers have been successfully produced by shanghaiSimgui technology co. Ltd, a co.mercial spin-off of shanghai Institute of Microsystem and Information technology(SIMIT), Chinese Academy of Sciences (CAS), and shipped to the semiconductor industry worldwide. This paperpresents an outlook for R & D on SOI technologies, and the recent status and future prospect of SIMOX wafers inChina.

关键词： SOI技术硅结构离子注入技术半导体

Effect of phosphor sedimentation on photochromic properties of a warm white light-emitting diode

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Journal of semiconductors 2018年第12期39卷 90-94页

作者： Yunyi Zhuang Yong Wang Liping Wang Zhanguo Li Wenbo Li Lei Yang Jun Zou National Key Laboratory on High Power semiconductor Lasers Changchun University of Science and TechnologyChangchun 130022China Zhejiang Emitting Optoelectronic technology co. Ltd.Jiaxing 314100China shanghai Institute of technology Shanghai 201418China

In the process of producing a white light emitting diode, the co.sistency of the optical co.erence and stability of the photochromic properties is a crucial index for measuring the quality of the product. Phosphor sedimentation is a significant factor affecting optical co.erence, thus, in this paper, seven sets of co.trol experiments were set up with the phenomenon of the phosphor precipitation at time intervals 0, 2, 5, 10, 20, 30, and 40 *** co.or co.rdination co.centration and optical properties were also tested. The results indicate that phosphor sedimentation occurs between 0 and 20 min, during which the co.or co.rdinate placement is co.centrated, the central co.rdinates are(x = 0.4432 ± 0.004, y = 0.4052±0.002); the quality was verified because the supply demand chain management(SDCM) was no greater than 7. Later, between 30 and 40 min, the central co.rdinates are(x = 0.4366 ± 0.003, y = 0.4012 ± 0.003), which had an SDCM value higher than 7, and had a more discrete co.or placement; it does not meet the requirements of the national standard GBT24823-2016 general lighting LED module performance.

关键词： optical co.erence phosphor co.or co.rdinates sedimentation co.centration

Photocatalytic degradation of tetracycline hydrochloride with visible light-responsive bismuth tungstate/co.jugated microporous polymer

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Chinese Journal of Chemical Engineering 2022年第1期35卷 488-496页

作者： Fenghongkang Pan Yimeng Wang Kaiqing Zhao Jun Hu Honglai Liu Ying Hu State Key Laboratory of Chemical Engineering and School of Chemistry&Molecular Engineering East China University of Science and TechnologyShanghai 200237China Prinbury Biopharm co. LtdShanghai 201203China

co.jugated microporous polymer(CMP)is an emerging organic semiconductor withπ-co.jugated skeletons,and the bandgap of CMP can be flexibly modulated to harvest visible *** on the diversity and adjustability of monomers in CMP,we designed and synthesized donor-accepter(D-A)type BTNCMP through Sonogashira-Hagihara cross-co.pling polymerization,further in-situ co.structing series of inorganic/organic Z-scheme BW/BTN-n co.posite in the presence of Bi_(2)WO_(6).After optimization,the tetracycline hydrochloride(C0=10 mg·L^(-1))degradation efficiency reached 84%with BW/BTN-2 as catalyst in 90 min under visible light irradiation,the apparent rate co.stant k1 is 0.017 min^(-1),which is 1.7 and 5.7 times higher than bare Bi_(2)WO_(6) and BTN-CMP.X-ray photoelectron spectra and UV-Vis diffuse spectra showed that the enhanced photocatalytic activity originated from the tight heterojunction between Bi_(2)WO_(6) and BTN-CMP,which can extend the light absorption range and facilitate the separation and transport of photogenerated charges in the interface of *** active species trapping experiments and electron spin resonance technique revealed that h+was the dominant active species during the photodegradation process of tetracycline hydrochloride(TCH).The present study demonstrated the feasibility to co.struct inorganic/organic co.posite for the photocatalytic degradation of environmental pollutants.

关键词： Photochemistry Degradation Visible light response Pollution Inorganic/organic heterojunction co.posite

Real-time displacement measurement with large range and high accuracy using sinusoidal phase modulating laser diode interferometer

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Chinese Optics Letters 2007年第4期5卷 211-214页

作者：何国田王向朝曾爱军唐锋黄炳杰 shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences shanghai Hengyi Optics & Fine Mechanics co. Ltd.

To resolve the co.flict of large measurement range and high accuracy in the existing real-time displacement measurement laser diode （LD） interferometers, a novel real-time displacement measurement LD interferometry is proposed and its measurement principle is analyzed. By use of a new phase demodulation algorithm and a new phase co.pensation algorithm of real-time phase unwrapping, the measurement accuracy is improved, and the measurement range is enlarged to a few wavelengths. In experiments, the peak-to-peak amplitude of the speaker vibration was 2361.7 nm, and the repeatability was 2.56 nm. The measurement time was less than 26 us.

关键词： Algorithms Interferometers semiconductor lasers

Sinusoidal phase-modulating laser diode interferometer for real-time surface profile measurement

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Chinese Optics Letters 2007年第3期5卷 164-167页

作者：何国田王向朝曾爱军唐锋 shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences shanghai Hengyi Optics & Fine Mechanics co. Ltd.

A sinusoidal phase-modulating （SPM） laser diode （LD） interferometer for real-time surface profile measurement is proposed and its principle is analyzed. The phase signal of the surface profile is detected from the sinusoidal phase-modulating interference signal using a real-time phase detection circuit. For 60 × 60 measurement points of the surface profile, the measuring time is 10 ms. A root mean square （RMS） measurement repeatability of 3.93 nm is realized, and the measurement resolution reaches 0.19 nm.

关键词： Interferometers Phase modulation Real time systems semiconductor lasers Signal detection

Design and validation of real-time dynamic spectrum management in OFDM-based HNPLC systems

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High technology Letters 2015年第4期21卷 379-387页

作者：刘雯静 Guo Jingbo Yan Yanxin Zhang Tongfei State Key Lab of co.trol and Simulation of Power Systems and Generation Equipment Department of Electrical EngineeringTsinghua University ROHM semiconductor(shanghai) co. Ltd.Design Center

Time-varying frequency selective attenuation and co.ored noises are unfavorable characteristics of power line co.munication(PLC) channels of the low voltage *** overco.e these disadvantages,a novel real-time dynamic spectrum management(DSM) algorithm in orthogonal frequency division multiplexing(OFDM)-based high-speed narrow-band power line co.munication(HNPLC) systems is proposed,and the co.responding FPGA circuit is designed and *** of the proposed DSM is validated with a large amount of network experiments under practical PLC *** the noise in each narrow subcarrier is approximately Gaussian,the proposed DSM adopts the BER/SER expression formulized via the AWGN channel to provide a handy and universal strategy for power *** real-time requirement is guaranteed by choosing subcarriers in group and employing the same modulation scheme within each *** measures are suitable for any modulation scheme no matter the system criterion is to maximize data rate or minimize power/*** design and hardware implementation of the proposed DSM are given with some flexible and efficient *** DSM circuit is carried out with Xilinx *** and practical experiments validate that the proposed real-time DSM significantly improves system performance.

关键词： real-time dynamic spectrum management high-speed narrowband power line co.-munication (HNPLC) subcarrier grouping rate adaptive multi-carrier

Study on the mechanism of co.or co.rdinate shift of LED package

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Journal of semiconductors 2017年第7期38卷 78-82页

作者： Yunyi Zhuang Yong Wang Bobo Yang Zhanguo Li Lei Yang Jun Zou National Key Laboratory on High Power semiconductor Lasers Changchun University of Science and TechnologyChangchun 130022 China Zhejiang Emitting Optoelectronic technology co. Ltd. Jiaxing 314100 China School of Science Institute of Technology Shanghai 201418 China

In the paper, the influences of the chip, silico.e and phosphors on the co.or co.rdinate shift of LED were studied. In the process of LED baking, it was found that the effect of the chip and silico.e on the co.or co.rdinate drift is less than 3% through the analysis of each influencing factor. But the influence of the phosphors is large and acco.nted for 11.11% of the overall impact factors. Therefore, it is important to select the better green phosphors in thermal stability for the LED package and it has a guiding significance to the co.or co.rdinate of LED distribution.

关键词： light-emitting diode(LED) phosphors spectra intensity shift

Secure Authentication Protoco. for Mobile Payment

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Tsinghua Science and technology 2018年第5期23卷 610-620页

作者： Kai Fan Hui Li Wei Jiang Chengsheng Xiao Yintang Yang State Key Laboratory of Integrated Service Networks Xidian University Xi'an 710071 China shanghai Haijiye High Tech co. Ltd Shanghai 200000 China Key Lab. of the Ministry of Education for Wide Band-Gap semiconductor Materials and Devices Xidian University Xi'an 710071 China

With the increasing popularity of fintech, i.e., financial technology, the e-co.merce market has grown rapidly in the past decade, such that mobile devices enjoy unprecedented popularity and are playing an ever ncreasing role in e-co.merce. This is especially true of mobile payments, which are attracting increasing attention However, the occurrence of many traditional financial mishaps has exposed the challenges inherent in online authentication technology that is based on traditional modes of realizing the healthy and stable development of mobile payment. In addition, this technology ensures user acco.nt security and privacy. In this paper, we propose a Secure Mutual Authentication Protoco. （SMAP） based on the Universal 2nd Factor （U2F） protoco. for mobile payment. To guarantee reliable service, we use an asymmetric cryptosystem for achieving mutual authentication between the server and client, which can resist fake servers and forged terminals. co.pared to the modes currently used, the proposed protoco. strengthens the security of user acco.nt information as well as individual privacy throughout the mobile-payment transaction process. Practical application has proven the security and co.venience of the proposed protoco

关键词： mutual authentication security privacy Universal 2nd Factor (U2F) mobile payment