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Communications in Theoretical Physics 2006年第2期45卷 199-206页

作者： zhang yuan-yuan wang Qi zhang Hong-Qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

In this paper, a further extended Jacobi elliptic function rationM expansion method is proposed for constructing new forms of exact solutions to nonlinear partial differential equations by making a more general transformation. For illustration, we apply the method to （2＋1）-dimensionM dispersive long wave equation and successfully obtain many new doubly periodic solutions. When the modulus m→1, these sohitions degenerate as soliton solutions. The method can be also applied to other nonlinear partial differential equations.

关键词： doubly periodic solution soliton solution (2+1)-dimensional dispersive long wave equation

Negatons, Positons, and Complexiton Solutions of Higher Order for a Non-isospectral KdV Equation

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Communications in Theoretical Physics 2007年第3X期48卷 411-414页

作者： zhang yuan-yuan wang Qi zhang Hong-Qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

In this paper, negatons, positons, and complexiton solutions of higher order for a non-isospectral KdV equation, the KdV equation with loss and non-uniformity terms are obtained through the bilinear Baicklund transfor... 详细信息

关键词： bilinear Backlund transformation negatons positons complexiton solutions

Clustering-triggered Emission of Nonaromatic Polymers with Multitype Heteroatoms and Effective Hydrogen Bonding

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Chemical Research in Chinese Universities 2021年第1期37卷 177-182页

作者： KAUSAR Fahmeeda YANG Tianjia ZHAO Zihao zhang Yongming yuan wang zhang School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Lab of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai200240P.R.China

Nonconventional luminophores without large conjugated structures are attracting increasing attention for their unique aggregation-induced emission(AIE)properties and promising applications in optoelectronic and biomedical *** emission mechanism,however,remains elusive,which makes rational molecular design ***,we proposed the clustering-triggered emission(CTE)mechanism to illustrate the *** clustering of electron-rich nonconventional chromophores withπand/or n electrons and consequent electron cloud overlap is crucial to the ***,based on the CTE mechanism,nonaromatic polymers containing multitype heteroatoms(i.e.,O,N,and S)and involving amide(CONH)and sulfide(-S-)groups were designed and synthesized through facile thiol-ene click *** resulting polymers demonstrated typical concentration-enhanced emission,AIE phenomenon,and excitation-dependent ***,compared with polysulfides,these polymers exhibited much higher solid-state emission efficiencies,because of the incorporation of amide units,which contributed to the formation of emissive clusters with highly rigidified conformations through effective hydrogen ***,distinct persistent cryogenic phosphorescence or even room temperature phosphorescence(RTP)was *** photophysical behaviors can well be rationalized in terms of the CTE mechanism,indicating the feasibility of rational molecular design and luminescence regulation.

关键词： Clustering-triggered emission Aggregation-induced emission Nonaromatic polymer Heteroatom Phosphorescence

Synthesis and Characterization of Polystyrene/Nanosilica Organic-Inorganic Hybrid

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Chemical Research in Chinese Universities 2006年第6期22卷 797-802页

作者： yuan wang-zhang PENG Mao YU Qiu-ming TANG BEN-zhong ZHENG Qiang Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang 550025 P. R. China Department of Chemistry Hong Kong University of Science and Technology Kowloon Hong Kong P. R. China

A polystyrene（PS）/nanosilica organic-inorganic hybrid material was prepared from styrene monomer and commercial aqueous silica sol containing large amounts of Si-OH by means of emulsion polymerization. The nanosilica sol was modified by the addition of the reactive coupling agent methacrylexy propyltrimethoxysilane （ MPS）, and the resulting latex particles were protected by surfactants such as sodium dodecyl sulphonate（ SDS）, hydroxypropyl methyl cellulose （ HMPC）, and poly （vinylpyrrolidone）（PVP）. The effects of the type of surfactant, the amount of surfactant, and the coupling agent on the shape and stability of the resulting latex particles were investigated. The TEM observation indicates that among SDS, HMPC, and PVP, SDS is the best surfactant. When the content of SDS is 0. 5% and the amount of MPS is 7% in the system, the latex with obvious core-shell structure could be obtained. The average diameters of the monodispersed particles range from 182 to 278 nm, and the average number of silica beads for each composite are 1325 and 4409, respectively. The FrIR analysis shows that PS was chemically linked to silica through MPS. The thermal gravimetric analysis shows that when there is a higher silica content, the hybrid composites have a better heat resistance.

关键词： Commercial aqueous silica sol Organic-inorganic hybrid particle Core-shell latex 1005-9040 (2006) -06-797-06

3D-Simulations of Transverse Optical Modes of the Free Electron Laser Resonator with Hole Output Coupling

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Communications in Computational Physics 2006年第5期1卷 920-929页

作者： Yu-Huan Dou Xiao-Jian Shu yuan-zhang wang Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088P.R.China

The transverse construction of optical modes in the wiggler is calculated and the numerical simulations of the free-electron laser hole-coupled resonator are carried *** 3D-simulations include optical amplitude distributions,modes evolvement of optical field and the influence of hole-radius on the distributing of *** nu-merical simulations confirm that the fraction of the even-order modes increase in the start-up stage and then decreases in the exponential gain ***,it is found that the fundamental mode is dominant in the saturate *** on this observa-tion,we estimate the optical output coupling by using the the fundamental *** is found that the numerical results and the first-order estimate are in good agreement for a range of the hole size.

关键词： Free-electron laser optical resonator mode analysis numerical simulation

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非对称来流下矩形转圆隔离段数值研究

推进技术 2016年第12期37卷 2243-2250页

作者：王渊张堃元中国民航大学中欧航空工程师学院天津300300 南京航空航天大学能源与动力学院江苏南京210016

针对采用超椭圆曲线方法设计的矩形转圆隔离段,在非对称来流条件下,利用数值模拟手段研究了出口反压、来流马赫数、进口附面层厚度等因素对其性能的影响。研究结果表明:出口反压与附面层相互作用导致初始激波形态转变为"λ"激波,并且隔... 详细信息

针对采用超椭圆曲线方法设计的矩形转圆隔离段,在非对称来流条件下,利用数值模拟手段研究了出口反压、来流马赫数、进口附面层厚度等因素对其性能的影响。研究结果表明:出口反压与附面层相互作用导致初始激波形态转变为"λ"激波,并且隔离段的性能随着反压的增大而下降,低能流区域迅速增长,流场非对称效应逐渐变小;来流马赫数的增大会提高隔离段的抗反压能力,并且会降低流场的非对称效应,但出口总压恢复系数却随之下降,特别是与来流马赫数为2情况相比,当来流马赫数为2.5时其降低了7.2%;进口附面层厚度的增加会加剧隔离段内的流动分离,导致隔离段的抗反压能力降低,不利于隔离段出口流场品质,并且相对于均匀来流而言,当进口附面层无量纲厚度为0.33时出口总压恢复系数下降了13.7%。

关键词：超燃冲压发动机隔离段矩形转圆非对称来流数值模拟

Low swing drivers based on charge redistribution

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Science China(Information Sciences) 2010年第11期53卷 2377-2388页

作者： WU FengFeng, JIA Song, wang yuan & zhang GangGang Key Laboratory of Microelectronics Devices and Circuits (MOE), Department of Microelectronics, Peking University, Beijing 100871, China 1. Key Laboratory of Microelectronics Devices and Circuits (MOE) Department of Microelectronics Peking University Beijing 100871 China

Low power on-chip interconnect technique is important for deep submicron SOC design. In this paper, a novel low swing drivers scheme based on charge redistribution is proposed. Significant reduction in power dissipation is achieved by dividing the full signal swing into several lower ones. The proposed circuits are especially suitable for driving multi-branch transmission wires by utilizing higher efficiency of charges. Compared with the reference design, the new scheme can reduce power dissipation by more than 66% as shown by HSPICE simulation while driving three branches. The proposed circuits have been fabricated and its effectiveness has been verified by measurement results.

关键词： low swing charge redistribution low power design

Design of novel,semi-transparent flip-flops (STFF) for high speed and low power application

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Science China(Information Sciences) 2012年第10期55卷 2390-2398页

作者： LI XiaYu ,JIA Song,LIU LiMin,wang yuan & zhang GangGang Key Laboratory of Microelectronics Devices and Circuits(MOE),Department of Microelectronics,Peking University,Beijing 100871,China 1. Key Laboratory of Microelectronics Devices and Circuits (MOE) Department of Microelectronics Peking University Beijing 100871 China

This paper presents a novel,semi-transparent structure to implement single-edge and dual-edge triggered *** two novel flip-flops can achieve high speed and low power due to their short data paths and fewer redundant *** results show that the proposed semi-transparent flip-flop and dual-edge triggered semi-transparent flip-flop perform best compared with conventional *** reduces the power-delay-product 33.1% compared with Antonio’s sense amplifier based *** improves the PDP 9.1% and 47.8% as compared with dual-edge triggered sense amplifier based flip-flop and high speed dual-edge triggered modified hybrid latch flip-flop respectively.

关键词： flip-flop semi-transparent high speed low power

Research of Confocal Laser Induced Fluorescence Detection System for Micro-fluidic Chip

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Semiconductor Photonics and Technology 2007年第2期13卷 104-107,111页

作者： FENG Jin-yuan wang Xiu-hua zhang Hua-feng School of Physics South China University of Technology Guangzhou 510640 CHN

The characteristics such as signal noise ratio（SNR） and sensitivity of the fluorescence detection system for micro-fluidic chip influence the performance of the whole system extremely. The confocal laser induced fluorescence detection system is presented. Based on the debugging of optical and circuit modules, the results of detecting the samples are given and analyzed theoretically, and the improved project is put forward.

关键词： micro-fluidic chip laser induced fluorescence detection SNR sensitivity confocal

CMOS image sensor with optimal video sampling scheme

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Science China(Information Sciences) 2012年第6期55卷 1429-1435页

作者： GUAN Ning,zhang Xu,LIU Bo,DONG Zan,HUANG BeiJu,GUI Yun,HAN JianQiang,wang yuan,zhang ZanYun & CHEN HongDa State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Science,Beijing 100083,China 1. State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Science Beijing 100083 China

Time-varying illumination on the focal plane is a three-dimensional *** sam-pling theory proves that the temporal resolution can be optimally improved by a factor of 2～(1/2) while the spatial resolution is reserved by changing the sampling *** on the theory,a prototype multi-field CMOS image sensor (CIS) is designed for a 0.35-μm 2P4M CMOS *** pixels in 4×4-pixel clusters are assembled into 16 fields over the whole *** pins (resets and shutters) of pixels are separated which provides the ability of sampling the illumination with the optimal sampling scheme.

关键词： CMOS image sensors sampling methods deinterlacing high speed photography selective readout