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2010 International Conference on Audio, Language and Image Processing, ICALIP 2010

作者： Liao, Xiaotong Ma, Ran An, Ping Zhang, Zhaoyang School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai 200072 China

ISBN: (纸本)9781424458653

A new scheme of layered coding of stereoscopic video based on the correlation of motion vector fields (MV fields) is proposed in this paper, in which the bit streams robustness is improved to error channel and the coding efficiency is not reduced evidently. In our proposed scheme, the stereoscopic video is classified into one base layer and two enhancement layers. First, left-view video is encoded as Base Layer to ensure the basic quality of two-dimensional video. Then, the disparity vectors(DVs) of right-view video are encoded as Enhancement Layer *** lower bit rates further and reduce the network load, the strong correlation of the motion vectors(MVs) for two views video sequence are tested. Based on the correlation of MVs between views, the MVs of right-view are transmitted as Enhancement Layer 2 only if the correlation between left and right view is less than some threshold. Experimental results are demonstrated to testify the efficiency of our proposed scheme. ©2010 IEEE.

关键词： Efficiency

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Influence of thermal annealing-induced molecular aggregation on film properties and photovoltaic performance of bulk heterojunction solar cells based on a squaraine dye

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Frontiers of Materials Science 2018年第2期12卷 139-146页

作者： Pengpeng ZHANG Zhitian LING Guo CHEN Bin WEI School of Materials Science and Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications (Ministry of Education) Shanghai University Shanghai 200072 China

Squaraine （SQ） dyes have been considered as efficient photoactive materials for organic solar cells. In this work, we purposely controlled the molecular aggregation of an SQ dye, 2,4-bis[4-（N,N-dibutylamino）-2-dihydroxyphenyl] SQ （DBSQ- （OH）2） in the DBSQ（OH）2：[6,6]-phenyl-Cel-butyric acid methyl ester （PCBM） blend film by using the thermal annealing method, to study the influence of the molecular aggregation on film properties as well as the photovoltaic performance of DBSQ（OH）2：PCBM-based bulk heterojunction （BHJ） solar cells. Our results demonstrate that thermal annealing may change the aggregation behavior of DBSQ（OH）2 in the DBSQ（OH）2：PCBM film, and thus significantly influence the surface morphology, optical and electrical properties of the blend film, as well as the photovoltaic performance of DBSQ（OH）2：PCBM BHJ cells.

关键词： organic solar cells squaraine dye molecular aggregation film properties power conversion efficiency

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Engineering grain boundaries in monolayer molybdenum disulfide for efficient water-ion separation

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Science (New York, N.Y.) 2025年第6735期387卷 776-782页

作者： Shen, Jie Aljarb, Areej Cai, Yichen Liu, Xing Min, Jiacheng Wang, Yingge Wang, Qingxiao Zhang, Chenhui Chen, Cailing Hakami, Mariam Fu, Jui-Han Zhang, Hui Li, Guanxing Wang, Xiaoqian Chen, Zhuo Li, Jiaqiang Dong, Xinglong Shih, Kaimin Huang, Kuo-Wei Tung, Vincent Shi, Guosheng Pinnau, Ingo Li, Lain-Jong Han, Yu Physical Sciences and Engineering Division (PSE) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore Department of Physics King Abdulaziz University Jeddah Saudi Arabia KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Nanjing Tech University (NanjingTech) Nanjing China Shanghai Applied Radiation Institute Shanghai Key Laboratory of Atomic Control and Application of Inorganic 2D Supermaterials Shanghai University Shanghai China Department of Mechanical Engineering University of Hong Kong Pok Fu Lam Road Hong Kong China Department of Civil Engineering University of Hong Kong Pok Fu Lam Road Hong Kong China Imaging and Characterization Core Lab King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Department of Chemical System Engineering School of Engineering University of Tokyo Tokyo Japan Center for Electron Microscopy South China University of Technology Guangzhou China School of Emergent Soft Matter South China University of Technology Guangzhou China Catalyst Center of Excellence (CCoE) Research and Development Center Saudi Aramco Dhahran Saudi Arabia Center for Sustainability and Energy Technologies Chang Gung University Taoyuan Taiwan Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining Qinghai China University of Chinese Academy of Sciences Wenzhou China

Two-dimensional (2D) materials have long been considered as ideal platforms for developing separation membranes. However, it is difficult to generate uniform subnanometer pores over large areas on 2D materials. We report that the well-defined eight-membered ring (8-MR) pores, typically formed at the boundaries of two antiparallel grains of monolayer molybdenum disulfide (MoS2), can serve as molecular sieves for efficient water-ion separation. The density of grain boundaries and, consequently, the number of 8-MR pores can be tuned by regulating the grain size. Optimized MoS2 membranes outperformed the state-of-the-art membranes in forward osmosis tests by demonstrating both ultrahigh water/sodium chloride selectivity and exceptional water permeance. Creating precise pore structures on atomically thin films through grain boundary engineering presents a promising route for producing membranes suitable for various applications.

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High-brightness blue organic light emitting diodes with different types of guest-host systems

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Optoelectronics Letters 2016年第2期12卷 89-92页

作者：王肖张敬爽彭翠云郭坤平魏斌张浩 School of Materials Science and Engineering Shanghai University Shanghai 200072 China Langfang Polytechnic Institute Langfang 065001 China Key Laboratory of Advanced Display and System Application Ministry of Education of China Shanghai UniversityShanghai 200072 China

We demonstrate high-brightness blue organic light emitting diodes(OLEDs) using two types of guest-host systems. A series of blue OLEDs were fabricated using three organic emitters of dibenz anthracene(perylene), di(4-fluorophenyl) amino-di(styryl) biphenyl(DSB) and 4,4'-bis[2-(9-ethyl-3-carbazolyl)vinyl]biphenyl(BCzV Bi) doped into two hosting materials of 4,4'-bis(9-carbazolyl) biphenyl(CBP) and 2-(4-biphenylyl)-5(4-tert-butyl-phenyl)-1,3,4-oxadiazole(PBD) as blue emitting layers, respectively. We achieve three kinds of devices with colors of deep-blue, pure-blue and sky-blue with the Commission Internationale de L'Eclairage(CIE) coordinates of(0.16, 0.10),(0.15, 0.15) and(0.17, 0.24), respectively, by employing PBD as host material. In addition, we present a microcavity device using the PBD guest-host system and achieve high-purity blue devices with narrowed spectrum.

关键词： guest biphenyl brightness coordinates colors normalized Internationale vinyl butyl biochemistry

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Low-voltage and high-stability p-type doped blue organic light-emitting diodes with bilayer hole injection layers

Low-voltage and high-stability p-type doped blue organic lig...

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2010 8th International Vacuum Electron Sources Conference and NANOcarbon(第八届真空电子源和纳米碳国际会议)

作者： F.F.Yu H.Zhang J.N.Yu L.Long L.Lu J.H.Zhang B.Wei Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai University Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai Universit

@@In recent years, organic light-emitting diodes (OLEDs) for the application of flat panel displays (FPDs) have been attracting many researchers. Blue OLEDs are the potential light source to make full color FPDs by color conversion method. However, due to a large energy bandgap of blue emission materials, blue OLEDs were widely reported to have relatively low luminance efficiencies and high operation voltage, compared to the devices with low energy emission wavelength.

关键词： Indium tin oxide

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Compressed sensing based channel estimation for fast fading OFDM systems

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Journal of systems Engineering and Electronics 2010年第4期21卷 550-556页

作者： Xiaoping Zhou Yong Fang Min Wang Key Laboratory of Specialty Fiber Optics and Optical Access Networks School of Communication and Information Engineering Shanghai University Shanghai 200072 P. R. China Key Laboratory of Advanced Display and System Applications Shanghai 200072 P. R. China

A compressed sensing（CS） based channel estimation algorithm is proposed by using the delay-Doppler sparsity of the fast fading channel.A compressive basis expansion channel model with sparsity in both time and frequency domains is *** pilots in accordance with a novel random pilot matrix in both time and frequency domains are sent to measure the delay-Doppler sparsity *** relatively nonzero channel coefficients are tracked by random pilots at a sampling rate significantly below the Nyquist *** sparsity channels are estimated from a very limited number of channel measurements by the basis pursuit *** proposed algorithm can effectively improve the channel estimation performance when the number of pilot symbols is reduced with improvement of throughput efficiency.

关键词： compressed sensing sparse channel channel estimation fast fading.

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A skin-conformal and breathable humidity sensor for emotional mode recognition and non-contact human-machine interface

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npj Flexible Electronics 2024年第1期8卷 929-937页

作者： Tongkuai Li Tingting Zhao Hao Zhang Li Yuan Congcong Cheng Junshuai Dai Longwei Xue Jixing Zhou Hai Liu Luqiao Yin Jianhua Zhang Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai University149 Yanchang RoadShanghai 200072China Shanghai Key Laboratory of Intelligent Manufacturing and Robotics Shanghai University333 Nanchen RoadShanghai 200444China School of Microelectronics Shanghai University20 Chengzhong RoadShanghai 201800China

Noncontact humidity sensor overcomes the limitations of its contact sensing counterparts,including mechanical wear and cross infection,which becomes a promising candidate in healthcare and human-machine interface ***,current humidity sensors still suffer the ubiquitous issue of uncomfortable wear and skin irritation hindering the long-term *** this study,we report a skin-conformal and breathable humidity sensor assembled by anchoring MXenes-based composite into electrospun elastomer nanofibers coated with a patterned *** composite is highly sensitive to the water molecules due to its large specific surface area and abundant water-absorbing hydroxyl groups,while the elastomeric nanofibers provide an ultrathin,highly flexible,and permeable substrate to support the functional materials and *** sensor presents not only excellent air permeability(0.078 g cm^(−2)d^(−1)),high sensitivity(S=704),and fast response/recovery(0.9 s/0.9 s),but also high skin conformability and ***,this humidity sensor is confirmed to realize the recognition of motional states and emotional modes,which provides a way for the advanced noncontact human-machine interface.

关键词： composite interface conformal

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Effects of substrate temperature on the properties of silicon oxide films by PECVD

Effects of substrate temperature on the properties of silico...

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2012 International Applied Mechanics, MechatronicsAutomation and system Simulation Meeting, AMMASS 2012

作者： Li, Chunya Li, Xifeng Chen, Longlong Shi, Jifeng Zhang, Jianhua Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China

Under different growth conditions, silicon Oxide (SiOx) thin films were deposited successfully on Si (100) substrates and glass substrates by plasma enhanced chemical vapor deposition (PECVD). The thickness, refractive index and growth rate of the thin films were tested by ellipsometer. The effects of deposition temperature on the structure and properties of SiOx films were studied using X ray diffraction (XRD), X ray photoelectron spectroscopy (XPS) and UV-Visible spectroscopy. The results show that the SiOx films were amorphous at different deposition temperature. The peaks of Si2p and O1s shifted to higher binding energy with temperature increasing. The SiOx films had high transmissivity at the range of 400-900nm. By analyzing the observation and data, the influence of deposition parameters on the electrical properties and interface characteristics of SiOx thin film prepared by PECVD is systematically discussed. At last, SiOx thin film with excellent electrical properties and good interface characteristic is prepared under the relatively optimum parameters. © (2012) Trans Tech Publications, Switzerland.

关键词： Plasma enhanced chemical vapor deposition

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An efficient VLSI architecture of sub-pixel interpolator for AVS encoder

An efficient VLSI architecture of sub-pixel interpolator for...

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2008 9th International Conference on Signal Processing, ICSP 2008

作者： Guanghua, Chen Xiaoli, Zhang Ming, Liu Jingming, Zhu Shiwei, Ma Weimin, Zeng Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)9781424421794

Interpolation is the main bottleneck in AVS real-time high definition video encoder for its high memory bandwidth and large calculation complexity caused by the new coding features of variable block size and 4-tap filter. In this paper, an efficient VLSI architecture of interpolation supporting AVS Baseline@L4 is presented. Vertical redundant data reuse, horizontal redundant data reuse and sub-pixel data reuse schemes are presented to reduce memory bandwidth and processing cycle. The separated 1-D interpolation filters are used to improve throughput and hardware utilization. The proposed design is implemented on the Vertex4 XC4VLX200 field programmable gate array with operating frequency of 150MHz and can support 1080p (1920X1080) 30fps AVS real-time encoder. It is a useful intellectual property design for real-time high definition video application. © 2008 IEEE.

关键词： Pixels

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The study of microcrystalline silicon thin films prepared by PECVD

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2012 Workshop on Inorganic Thin Films and Coatings

作者： Li, Chunya Zhang, Hao Li, Jun Li, Xifeng Zhang, Jianhua Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)9783037855669

Under different growth conditions, microcrystalline silicon thin films are deposited successfully on glass substrates by the double-frequency plasma enhanced chemical vapor deposition (PECVD). We report the systematic investigation of the effect of process parameters (hydrogen dilution, substrate temperature, forward power, reaction pressure, et al.) on the growth characteristics of microcrystalline silicon thin films. Raman scattering spectra are used to analyze the crystalline condition of the films and the experimental results. Optimizing the process parameters, the highest crystalline volume fraction of microcrystalline silicon films was achieved. It is found that the crystalline volume fraction of microcrystalline silicon films reaches 72.2% at the reaction pressure of 450 Pa, H2/SiH4 flow ratio of 800sccm/10sccm, power of 400 W and substrate temperature of 350 °C. © (2013) Trans Tech Publications, Switzerland.

关键词： Thin films

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