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IEEE International Symposium on Intelligent Signal Processing and Communication systems (ISPACS)

作者： Xiang Zhang Zhi Liu Jie Yang Institute of Image Processing and Patter Recognition Shanghai Jiaotong University China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University China

Accurate segmentation of moving objects from a video sequence is still a difficult task. A moving object segmentation method is proposed in this paper to deal with the segmentation splits and defects. First, it is claimed that the confusion point is one reason for the segmentation inaccuracy, and corresponding solution is also presented. According to the solution, new likelihood functions are proposed to compute membership probabilities, which are then used for final segmentation within an energy minimization framework. Unlike related algorithms which compute membership probabilities using kernel density estimation, the proposed method models the membership probabilities as functions with kernel density estimation as the independent variable. Experiments show that improved results are generated by the proposed likelihood functions.

关键词： Radio access networks

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Improved Delay Fault Coverage in SoC Using Controllable Multi-Scan-Enable

Improved Delay Fault Coverage in SoC Using Controllable Mult...

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2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology(第十届固态和集成电路技术国际会议 ICSICT-2010)

作者： Jin-yi ZHANG Xu-hui HUANG Wan-lin CAI Han-yi WENG Key Laboratory of Advanced Displays and system Application Ministry of Education Shanghai Universi Microelectronic Research & Development Center Shanghai University Key aboratory of Advanced Displays and system Application Ministry of Education Shanghai Universit

ISBN: (纸本)9781424457977

This paper presents a method of multi-Scan-Enable DFT design for at-speed scan testing to improve transition fault coverage. Base on the method, we build a novel TR-TC (Test Resources-Test Coverage) associated test cost mathematical model to effectively control the complexity of at-speed DFT design and establish the optimization number of ScanEnable, which provides a reliable target control value in multi-Scan-Enable DFT design for at-speed scan testing. Experiment results for transition fault coverage improvement on three industrial SoC circuits and the upper limit of the number of Scan-Enable are presented.

关键词： sweep test scanning fault latency controlling value fault coverage discrete Fourier transform Coverage test coverage Mathematical Model

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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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Effects of surface chemical treatment and annealing on p-GaN/ZnO:Ga contact

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Faguang Xuebao/Chinese Journal of Luminescence 2010年第6期31卷 848-853页

作者： Wang, Shu-Fang Li, Xi-Feng Zhang, Jian-Hua Key Laboratory of Advanced Display and System Applications Shanghai University Shanghai 200072 China School of Mechanical and Electronic Engineering and Automation Shanghai University Shanghai 200072 China

ZnO:Ga (GZO) transparent conductive thin film was deposited on p-GaN acting as the current spreading layer, but it leads to a large contact barrier because of the formation of Schottky contact. However, ohmic contact is of great importance to powered LED. In order to decrease the contact barrier, HCl and NaOH treatment of the p-GaN surface and annealing were employed in this work. The effects of different chemical treatment and annealing on p-GaN/GZO contact property were studied. It is obvious that solutions of alkaline treatment of p-GaN surface can decrease the interfacial barrier, which led to ohmic contact, and the barrier can be lightly increased by annealing.

关键词： Zinc oxide

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Warpage simulation for LCD interconnected by NCF

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Cailiao Kexue yu Gongyi/Material Science and Technology 2010年第6期18卷 857-861页

作者： Zhang, Jian-Hua Yuan, Fang Zhang, Jin-Song Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai 200072 China College of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China

To study the reliability of the Chip-on-Glass (COG) module interconnected by Non-Conductive-Adhesive (NCF), this paper applied finite element method (FEM) to simulate the fields of temperature and stress in COG. A 3D model of the COG module had been established and a sequence coupled field had been done to calculate the warpage and inner stress. In the thermalcompression bonding stage, the thermal process was a steady state, which produced a low temperature difference in the COG module, while the NCF absorbed and relaxed the thermal stress and strain to weaken warpage. In the cooling stage, the process was non-steady and a significant temperature difference between the interfaces of bump/NCF and NCF/substrate was induced at the beginning. This generated a high thermal stress difference to yield a large warpage. The residual stress and warpage were proportional to the decrease of the mechanical loading in the thermal compression bonding stage and the temperature difference in the cooling stage.

关键词： Glass

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Effects of Surface Pretreatments on p-GaN/GZO Contact by rf Magnetron Sputter

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ECS Transactions 2011年第1期34卷

作者： Wanjing Wang Xifeng Li Jinsong Zhang Jianhua Zhang School of Mechatronics Engineering and Automation Shanghai University No. 149 Rd Yanchang Shanghai Shanghai 200072 China Shanghai University Key Laboratory of Advanced Display and System Applications of Ministry of Education & School of Mechatronics Engineering and Automation Shanghai University No 149 Rd Yanchang Shanghai Shanghai 200072 China

The Effects of surface pretreatments of p-GaN using H2SO4, HF, KOH solution on the optical and electrical properties of GZO/p-GaN contacts have been investigated using a rf magnetron sputter deposition. The current-voltage characteristics of GZO/p-GaN contact is slightly improved using KOH solution treatment. Contact barrier of GZO/p-GaN can be considerably reduced on annealing at 530 °C for 15 min in N2 ambient and the ohmic contact is almost achieved for with KOH-treated sample. the light luminance of 86.7 cd/m2 at current of 20 mA is obtained for GZO electrodes of LEDs with KOH pretreatment.

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Uncalibrated Camera Vision Pointing Recognition for HCI

Uncalibrated Camera Vision Pointing Recognition for HCI

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IEEE International Conference on Computational Science and Engineering, CSE

作者： Ye-Peng Guan School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai China

Among gestures in non-verbal communication, pointing gesture can be taken as one of natural human computer interfaces. Vision based hand pointing is an optimal model for human-computer interaction (HCI). One of key problems among the vision based pointing gesture is how to recognize the pointing. Aiming at some limits existing in the literature, a novel method is developed to estimate pointing gestures based on some non-calibrated cameras. Multiple un-calibrated cameras are adopted to determine the pointing target based on pointing features extracted from multiple cameras and support vector machine (SVM) classifier. No explicit constraints are set on the cameras placement. Pointing user can move freely inside a wider interaction environment while pointing at some targets. The mentioned approach does not constrain the pointing surface whether is flat or not, or the target is visible by the cameras. Edge detection based on multi-scale wavelet transformation is used to extract pointing objects from a clutter background. Experiments have shown that the developed approach is efficient for pointing recognition by comparisons.

关键词： Cameras Support vector machines Image segmentation Human computer interaction Kernel Feature extraction Training

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Study on the application of thermal interface materials for integration of HP-LEDs

Study on the application of thermal interface materials for ...

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2010 IEEE CPMT Symposium Japan, ICSJ10

作者： Wu, Jun Zhuang, Meilin Li, Shuzhi Yang, Weiqiao Zhang, Jianhua School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China Shanghai Research Center of Solid-state Lighting Engineering and Technology Shanghai 201203 China

ISBN: (纸本)9781424475940

Contact thermal resistance existed in the contact face between light emitting diode(LED) substrate and heat sink, which could hinder thermal conducting from PN junction to heat sinks, when mounting high power LEDs(HP-LEDs) devices on the heat sinks. Thermal interface materials(TIMs) were filled in the contact face to reduce contact thermal resistance. This paper studied the application of TIMs used in cooling LEDs, and three types of TIMs were studied by thermal test and optical-electro test. The experiment results presented that when select TIMs for LED mounting, thermal conductivity, thickness, and the volume of fillers should be considered. ©2010 IEEE.

关键词： Junction temperature

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A 2.4GHz monolithic SiGe power amplifier for Wireless-LAN transceiver

A 2.4GHz monolithic SiGe power amplifier for Wireless-LAN tr...

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Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia)

作者： Ying Ruan Lei Chen Yan-hua Liu Feng Ran Zong-sheng Lai Faculty of Computer & Information Engineering Shanghai University of Electrical Power China Institute of Microelectronic Circuit & System East China Jiao Tong University China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China

A high-linearity power amplifier (PA) for 2.4 GHz Wireless-LAN transceiver is presented. The PA is designed and implemented using a 0.18 um SiGe BiCMOS process. An on-chip adaptive linearizer is comprised of a base-emitter diode of the bias transistor and a bypass capacitor with almost no increase in die area and no extra dc consumption. Besides the linearization function, the active biasing circuit is also temperature-insensitive with simple structure. Including all matching circuits and biasing circuits, the die area of the fully integrated PA is 1.2 mm * 1.1 mm. Temperature simulation indicates the variation of power gain is less than 1.6dB from 20°C to 80°C. The second-order and third-order LMD are less than -30.9 dBc and -34.5 dBc when the output PI dB has been reached. With 3.3 V supply, the PA achieves max PldB of 23.2 dBm and a power added efficiency (PAE) of 21.3%.

关键词： Power amplifiers Silicon germanium Power generation Radio frequency Power transistors Metals BiCMOS integrated circuits

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Stereoscopic video conversion based on depth tracking

Stereoscopic video conversion based on depth tracking

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International Conference on Signal Processing Proceedings (ICSP)

作者： Yanfei Wu Ping An Ping Wang Zhao Yang Zhang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai China

Conventional 2D-to-3D conversion approaches always have some problems due to fast motion and non-rigid objects. In this proposed approach, a bi-direction optical flow is used to extract credible corner points from original sequences, and then Mean Shift algorithm helps to segment foreground object. In addition, improved active contour model offers more accurate outlines. Finally depth correlation gets to deal with the temporal depth variation caused by objects' motion or camera motion. The experimental results give good performance with higher accuracy.

关键词： Tracking Computer vision Image motion analysis Adaptive optics Three dimensional displays Image color analysis Motion segmentation

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