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18th International Symposium on Intelligent Signal Processing and Communication systems, ISPACS 2010

作者： Shi, Ran Liu, Zhi Xue, Yinzhu School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Application Ministry of Education China

ISBN: (纸本)9781424473717

Salient object segmentation is an important technique for many content based applications. This paper presents an unsupervised salient object segmentation method under the graph cut optimization framework. First, we exploit a kernel density estimation based saliency model to generate the saliency map, which provides the useful cues for object segmentation. Then we exploit the saliency map to adaptively define the region cost term, the boundary cost term and their balancing weight in the cost function, which is minimized using graph cut to obtain a binary segmentation of salient objects. Experimental results on a variety of images demonstrate the better segmentation performance of our approach. © 2010 IEEE.

关键词： Costs

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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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8th International Vacuum Electron Sources Conference, IVESC 2010 and NANOcarbon 2010

作者： Lu, L. Yu, J.N. Long, L. Yu, F.F. Zhang, J.H. Zhang, H. Wei, B. Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University 149 Yanchang Road Shanghai 200072 China

ISBN: (纸本)9781424466429

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. © 2010 IEEE.

关键词： Flat panel displays

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Wigner-Ville distribution and cross Wigner-Ville distribution of noisy signals

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Journal of systems Engineering and Electronics 2008年第5期19卷 1053-1057页

作者： Chen Guanghua Ma Shiwei Liu Ming Zhu Jingming Zeng Weimin Key Laboratory of Advanced Display and System Applications Ministry of Education & Microelectronic Research and Development Center Shanghai Univ. Shanghai 200072 P. R. China

The Wigner-Ville distribution （WVD） and the cross Wigner-Ville distribution （XWVD） have been shown to be efficient in the estimation of instantaneous frequency （IF）. But the statistical result of the IF estimation from XWVD peak is much better than using WVD peak. The reason is given from a statistical point of view. Theoretical studies show that XWVD of the analyzed signal can be estimated from XWVD of the noise-contaminated signal. The estimation is unbiased, and the variance is equal to that of noise. In this case, WVD cannot be estimated from W-VD of the noise-contaminated signal. Therefore, higher SNR is required when WVD is used to analyze signals.

关键词： Wigner-Ville distribution cross Wigner-Ville distribution instantaneous frequency expectation variance.

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An adaptive and fast H.264 multi-frame selection algorithm based on information from previous searches

An adaptive and fast H.264 multi-frame selection algorithm b...

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IEEE International Conference onMultimedia and Expo, ICME 2007

作者： Liquan, Shen Zhi, Liu Zhaoyang, Zhang Xuli, Shi Key Lab. of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)1424410177

The H.264 video coding standard adopts multiple reference frames for motion estimation. This new feature improves the prediction accuracy of inter-coding blocks significantly, but it results in a considerable increase in encoder complexity, mainly regarding to multi-frame selection and motion estimation. The reference software JM adopts the full search scheme, and the increased computation is in proportion to the number of searched reference frames. However, the reduction of prediction residues is highly dependent on the nature of sequences, not on the number of searched frames. In this paper, we propose an adaptive and fast multi-frame selection algorithm (AFMFS) based on motion vectors and SAD information coming from previous searches to adaptively terminate the procedure of multiple reference frames selection. Compared with the full search algorithm and the flexible multi-reference frame search criterion (FMRFSC), simulation results show that the proposed algorithm can save 55.28% and 40.23% computation cost on average, respectively, while it still maintains similar coding efficiency. © 2007 IEEE.

关键词： Motion estimation

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Cu/Ag composite nanotrough embedded polyacrylonitrile film: Transparent conducting electrodes with excellent flexibility and a high quality factor

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Organic Electronics 2025年 144卷

作者： Qinjun Sun Jian Zhao Hua Ding Xiaoqian Wang Qianwen Hu LiYan Gao Yuying Hao College of Physics and Optoelectronics Shanxi Key Laboratory of Photovoltaic Technology and Application Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan 030024 China Graduate School Shanxi Key Laboratory of Photovoltaic Technology Taiyuan University of Technology Taiyuan 030024 China

With high flexibility, conductivity and transparency, metal nanotroughs (NTRs) are considered to be the most promising candidates for flexibility transparent electrode. Here, we report metal NTR films fabricated by electro-spun and thermal evaporation. By optimizing steam treatment time, copper-silver ratio, coverage rate, and transfer process, smooth and continuous metal NTR films were obtained. The Cu/Ag NTR-polyacrylonitrile (PAN) film displayed superior photoelectric properties: transmitted 94.4 % of visible light (550 nm), showed a low sheet resistance of 2.48 Ω/□ and a very high quality factor of 2.27 × 10 −1 (Ω/□) −1 . Meanwhile, the relative change rate of resistance was less than 0.002 under a bending radius of 5 mm after 10,000 cycles. The results indicate that composite metal nanotroughs provide a new way for the preparation of high performance flexible transparent electrode.

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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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Artificial synapses based on organic electrochemical transistors with self-healing dielectric layers

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Chinese Chemical Letters 2024年第3期35卷 423-427页

作者： Yushan Gao Junyao Zhang Dapeng Liu Tongrui Sun Jun Wang Li Li Shilei Dai Jianhua Zhang Zhenglong Yang Jia Huang School of Materials Science and Engineering Tongji UniversityShanghai 201804China Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai UniversityShanghai 200072China National Key Laboratory of Autonomous Intelligent Unmanned Systems Tongji UniversityShanghai 201804China

Organic electrochemical transistors(OECTs)have emerged as one type of promising building block for neuromorphic systems owing to their capability of mimicking the morphology and functions of biological neurons and ***,numerous kinds of OECTs have been developed,while self-healing performance has been neglected in most reported *** this work,the OECTs using self-healing polymer electrolytes as dielectric layers are *** important synaptic behaviors are simulated in the OECTs by doping the channel layers with ions from the *** from the dynamic hydrogen bonds in the self-healing polymer electrolytes,the OECTs can successfully maintain their electrical performance and the ability of emulating synaptic behaviors after self-healing compared with the initial *** significantly,the sublinear spatial summation function is demonstrated in the OECTs and their potential in flexible electronics is also *** results suggest that our devices are expected to be a vital component in the development of future wearable and bioimplantable neuromorphic systems.

关键词： Organic electrochemical transistors Artificial synapses Synaptic behaviors Self-healing Flexibility

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An effective error concealment method used in multi-view video coding

An effective error concealment method used in multi-view vid...

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4th International Congress on Image and Signal Processing, CISP 2011

作者： Liang, Liang Ma, Ran An, Ping Liu, Chang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application of the Ministry of Education Shanghai China

ISBN: (纸本)9781424493067

Multi-view video coding (MVC) is one of the newest video compression standards, which has better compression efficiency than single view video coding. As the coding scheme exploits spatial, temporal and inter-view dependability for this scope, it leads the reconstructed multi-view video (MVV) become worse when transmitted in error-prone networks. To solve this problem, an effective error concealment (EC) method for MVC is proposed in this paper. The proposed method conceals a corrupted block by combining a few candidate blocks in intra-view reference frames or inter-view reference frames. The experimental results show that the proposed method has better concealment effect if using the inter-view reference frames effectively in B-view. © 2011 IEEE.

关键词： Image coding

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The design of synchronous module in AM-OLED display controller

The design of synchronous module in AM-OLED display controll...

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2011 International Conference on Electric and Electronics, EEIC 2011

作者： Junwei-Ma Ran, Feng School of Mechatronical Engineering and Automation Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University China

ISBN: (纸本)9783642216961

On the basis of the analysis to the framework of AM-OLED display controllers, a key module - synchronous module is studied. In this paper, a FIFO circuit (first in first out) is designed using Gray convert technology and dual-port ram, which realizing scatheless transmit between different clock domain. The working principle of FIFO is analyzed, and the optimized FIFO circuit structure was put forward to improve the working stability of the FIFO. The synchronous module circuit was implemented by VerilogHDL language simulated through VCS (Verilog compiled simulator). The design had been applied successfully to a type of full colour TFT-OLED panel driver controller with gray levels 256, frame scanning frequency 60Hz ~ 100Hz. The testing results showed that this controller worked well with a stable and vivid display. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Controllers

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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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