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2013 International Conference on Materials for Renewable Energy and Environment, ICMREE 2013

作者： Chang, Yanyan Zhang, Nanhong Zhuang, Mengke Lu, Xiuzhen Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center Shanghai University Shanghai China

ISBN: (纸本)9781479933365

ZnO nanofibers were prepared by sol-gel processing and electrospinning technique. Poly (vinyl acetate) (PVA) and zinc acetate were used as precursors of PVA/ zinc acetate composite fibers. The composite and calcined nanofibers were characterized by Thermo gravimetric analysis (TGA), energy disperse spectroscopy (EDS), X-ray diractometer (XRD) and scanning electron microscopy (SEM), respectively. After calcination of PVA/zinc acetate composite nanofibers at 400, 600, and 800°C in air for 2 hours with heating rate of ∼4°C/min, ZnO nanofibers were obtained successfully. The ZnO nanofiber diameters were 207, 135, 158, and 200nm before and after calcination at 400, 600, 800°C, respectively. The diameter of fibers reduced firstly and then increased with the rising calcination temperature. The possible mechanism of it is also discussed. © 2013 IEEE.

关键词： Electrospinning

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EXPERIMENTAL STUDY ON THE VORTEX FORMATION AND ENTRAINMENT CHARACTERISTICS FOR A ROUND TRANSVERSE JET IN SHALLOW WATER

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Journal of Hydrodynamics 2009年第3期21卷 386-393页

作者： FAN Jing-yu ZHANG Yan WANG Dao-zeng Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China

The vortex formation and entrainment characteristics for a round transverse jet in shallow water were experimentally investigated by means of a combination of LIF flow visualization and PIV measurement. A scarf vortex wrapped around the main body of the jet is formed in the near-wall region due to the interaction between the resulting wall jet and sufficiently shallow crossflow, with some more or less unsteady flow properties and with spreading ranges as functions of both the velocity ratio and the water depth within the near field. The entrainment of the ambient crossflow fluid into the jet main body is closely associated with the time-evolving features of the shear layer between the jet and surrounding fluid as well as the induced vortical structures near the wall. In the case of slight impingement upon the wall, the interaction between the jet shear layer and the weak, unstable scarf vortex gives rise to an appreciable local entrainment enhancement, confined in the near-wall region in the vicinity of the stagnation point. While in the case of intense impingement upon the wall, the well-organized and stable scarf vortex gives rise to a greatly enhanced entrainment and a greatly increased lateral spreading rate nearly throughout the overall near field as compared to the conventional wall jet. In addition, the entrainment of the ambient crossflow fluid by the scarf vortex in this case occurs largely on the surface of the unique spiral roller structure by itself due to the presence of smaller and unorganized eddies, and accordingly the scarf vortex is likely to keep its spiral roller structure steadily to a relatively great downstream distance within the near field.

关键词： transverse jet shallow water vortex formation entrainment PIV measurement

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Recent advances in flexible noninvasive electrodes for surface electromyography acquisition

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npj Flexible Electronics 2023年第1期7卷 139-164页

作者： Lian Cheng Jun Li Aiying Guo Jianhua Zhang School of Microelectronics Shanghai University201800 ShanghaiChina Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University200072 ShanghaiPeople’s Republic of China

Surface electromyography(sEMG)is used to detect and analyze human muscle ***,flexible noninvasive electrodes(FNEs)have emerged to extract bioelectrical signals from individual *** FNEs to be deployed as a central component of physiological signal acquisition,the quest for elevated signal-to-noise ratio and density is compelling owing to the small amplitude of ***,we review recent progress in FNEs for sEMG *** summarize the needed properties of FNEs,compare the differences between passive electrodes and active electrodes and exemplify applications of *** also conclude the current challenges and future opportunities in sEMG acquisition.

关键词： potential. electrodes surface

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An efficient 3-D mapping algorithm for RGB-D SLAM 14th

An efficient 3-D mapping algorithm for RGB-D SLAM

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14th International Forum of Digital TV and Wireless Multimedia Communication, IFTC 2017

作者： Yu, Jiadong You, Zhixiang An, Ping Xia, Jie Key Laboratory of Advanced Displays and System Application Shanghai Institute for Advanced Communication and Data Science Ministry of Education Shanghai University Shanghai200444 China

ISBN: (纸本)9789811081071

Mapping algorithm is the beginning of SLAM, having a significant influence on the design of the follow-up SLAM system and final results. However, the popular mapping algorithms are not robust enough. These algorithms most are based on feature detection but can’t effectively eliminate false matches under challenging circumstances. In addition to this, there is a need for faster algorithms to process higher pixel images with the development of RGB-D sensors. This paper presents a new mapping algorithm to solve the problems. The approach converts the smoothness constraints to offer ultra-robust feature matching. Then, it takes the image smoothness as a statistical likelihood to sore the feature points’ adjacent region. Finally, we use Bi-direction KD-Tree to improve the ICP algorithm. Experiments are carried out with nyuv2 data set. It is challenging enough to test the performance of the new algorithm. © 2018, Springer Nature Singapore Pte Ltd.

关键词： Conformal mapping

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Effect of buffer layer on the performances of top emitting oled and bottom emitting OLEDs

Effect of buffer layer on the performances of top emitting o...

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作者： Zhang, Zhilin Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200072 China Department of Material Sciences Shanghai University Shanghai 201800 China

ISBN: (纸本)9787561752289

Buffer layer is a crucial issue for driving voltage, efficiency and stability of OLEDs Several buffer layers were used in Top-OLED (TOLED) and Bottom-OLEDs (BOLED) for comparison. It is found that starburst material mMTDATA based devices exhibited much high current efficiency than others, while metal oxide MoOx showed superior characteristics of low driving voltage and much long lifetime of devices. By combining the measurement of work function of the metal oxide, using a method of contact potential difference previously reported by us, with the investigation of relative Hole-only or Electron-only devices, the mechanism of formed low driving voltage, high efficiency and high stability were analyzed.

关键词： Buffer layers

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Efficient VLSI architecture of CAVLC decoder with power optimized

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Journal of Shanghai University(English Edition) 2009年第6期13卷 462-465页

作者：陈光化胡登基张金艺郑伟峰曾为民 Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronics Engineering and Automation Shanghai University

This paper presents an efficient VLSI architecture of the contest-based adaptive variable length code （CAVLC） decoder with power optimized for the H.264/advanced video coding （AVC） standard. In the proposed design, according to the regularity of the codewords, the first one detector is used to solve the low efficiency and high power dissipation problem within the traditional method of table-searching. Considering the relevance of the data used in the process of runbefore＇s decoding, arithmetic operation is combined with finite state machine （FSM）, which achieves higher decoding efficiency. According to the CAVLC decoding flow, clock gating is employed in the module level and the register level respectively, which reduces 43% of the overall dynamic power dissipation. The proposed design can decode every syntax element in one clock cycle. When the proposed design is synthesized at the clock constraint of 100 MHz, the synthesis result shows that the design costs 11 300 gates under a 0.25 μm CMOS technology, which meets the demand of real time decoding in the H.264/AVC standard.

关键词： H.264/advanced video coding （AVC） contest-based adaptive variable length code （CAVLC） decoder

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Texture and space-time based moving objects segmentation and shadow removing

Texture and space-time based moving objects segmentation and...

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3rd International Conference on Swarm Intelligence, ICSI 2012

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

ISBN: (纸本)9783642310195

A novel algorithm is developed to detect moving objects and remove cast shadows by exploiting textural and spatial-temporal features. Multi-scale wavelet transformation is used to segment moving objects based on spatial property. Textural and spectral features color ratio differences between two adjacent pixels in four different directions are used to remove cast shadows. RGB color space is selected instead of introducing complex color models to segment moving objects and eliminate shadows. The proposal requires much less efforts compared with currently available methods. It does not require any complex supervised training phase, and does not require manual calibration or makes any hypothesis. Experiments have highlighted that the proposal is robust and efficient to segment moving objects and suppress shadow by comparisons. © 2012 Springer-Verlag.

关键词： Wavelet transforms

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Association between Electroencephalographic microstates abnormalities and cognitive dysfunction in drug-naive MDD

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Brain Research 2025年 1860卷 149660-149660页

作者： Qin, Qin Liu, Xinyu Wang, Bin Wang, Xin Liang, Sixiang Chen, Chao Li, Meijia Han, Chuanliang Zhao, Xixi National Clinical Research Center for Mental Disorders & National Center for Mental Disorders Beijing Key Laboratory of Mental Disorders Beijing Anding Hospital Capital Medical University Beijing China Advanced Innovation Center for Human Brain Protection Capital Medical University Beijing China Department of Clinical Psychology Shandong Provincial Hospital affiliated to Shandong First Medical University Shandong China Key Laboratory of Complex System Control Theory and Application Tianjin University of Technology Tianjin 300384 China Faculty of Psychology and Center for Neuroscience Vrije Universiteit Brussel Brussels 1050 Belgium School of Biomedical Sciences and The Gerald Choa Neuroscience Institute The Chinese University of Hong Kong Hong Kong SAR China

Objectives: This study aims to investigate the link between Electroencephalography (EEG) microstate anomalies and cognitive impairments in individuals with drug-naive Major depressive disorder (MDD). Methods: We recruited 29 patients with drug-naive MDD and 30 healthy controls. The Hamilton Depression Rating Scale (HDRS-17) measured symptom severity, the MATRICS Consensus Cognitive Battery (MCCB) assessed neurocognitive function, and resting-state EEG data were collected using 64 scalp electrodes. Analysis of EEG microstates was conducted via the Microstate Analysis plugin for EEGLAB. Results: MDD group had lower scores in six neurocognitive MCCB domains. For EEG microstates, four similar ones (A − D) were found in both groups. Notably, microstate C duration was lower in MDD group (t = 4.549, P < 0.001), microstate D occurrence (t = 2.258, P = 0.028) and proportion (t = 3.733, P < 0.001) were lower in MDD group. There were significant differences in all 4 microstate transition probabilities between groups. For example, A − B, B − A etc. transitions were higher in MDD, while A − C, A − D etc. were lower. The proportion of microstate D was found positively correlated with Speed of processing (SOP) score (r = 0.499, df = 26, P = 0.007) and Working memory (WM) score (r = 0.451, df = 26, P = 0.016). The Occurrence of microstate D was found positively correlated with SOP score (r = 0.383, df = 26, P = 0.044) and WM score (r = 0.389, df = 26, P = 0.041). Conclusions: MDD patients show alterations in sub-second brain dynamics, characterized by a decreased proportion and occurrence of microstate D and shorter duration of microstate C, and significant shifts in microstate transition probabilities. These changes correlate with cognitive deficits across several domains, including processing speed and working memory. © 2025

关键词： Cognitive dysfunction Electroencephalographic microstates Major depressive disorder

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Intermolecular Charge Transfer for High-Performance Organic Light-Emitting Diodes

Intermolecular Charge Transfer for High-Performance Organic ...

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International Conference on display Technology, 2024

作者： Zhang, Zhen Wang, Zixing Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Yanchang 149 Shanghai 200072 China

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Thermally Activated Delayed Fluorescent Host for Highly Efficient DeepRed OLEDs

Thermally Activated Delayed Fluorescent Host for Highly Effi...

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International Conference on display Technology, 2024

作者： Zang, Panpan Wu, Youjun Zhang, Zhen Wu, Peng Wang, Zixing Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Yanchang 149 Shanghai200072 China

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