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Improved taboo search algorithm for designing DNA sequences

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Progress in Natural science:Materials International 2008年第5期18卷 623-627页

作者： Kai Zhang a, Jin Xu a,b, Xiutang Geng a, Jianhua Xiao a, Linqiang Pana, a The Key Laboratory of Image Processing and Intelligent Control, Department of Control science and engineering, Huazhong university of science and technology, Wuhan 430074, china b school of electronic engineering and Computer science, Peking university, Beijing 100871, china The Key Laboratory of Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China school of electronic engineering and Computer science Peking University Beijing 100871 China

The design of DNA sequences is one of the most practical and important research topics in DNA computing. We adopt taboo search algorithm and improve the method for the systematic design of equal-length DNA sequences, which can satisfy certain combinatorial and thermodynamic constraints. Using taboo search algorithm, our method can avoid trapping into local optimization and can nd a set of good DNA sequences satisfying required constraints.

关键词： DNA computing Taboo search algorithm DNA sequence design

Structure and Magnetic Properties of Ni-doped ZnO Powder

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Journal of Wuhan university of technology(Materials science) 2010年第5期25卷 770-773页

作者：高放赵俊 Department of electronic science and technology Huazhong University of Science and Technology

Ni-doped ZnO nanopowder （Zn0.98Ni0.2O） was synthesized by improved coprecipitation method. The average particle size of the powder was estimated to be 50 nm. The powder was then processed by thermal treatment. Samples were annealed at 1 073, 1 273, and 1 473 K, respectively. The solubility of NiO in ZnO and the lattice parameters of ZnO both increased with the temperature. The magnetic property of the doped samples was examined, and hysteresis loops were got. The results showed all the samples were ferromagnetic, while powder processed at 1 273 K for 4 h got a highest saturation magnetization （Ms） of 0.0457 emu/g. Also, magnetic properties were related to the grain size of the powder.

关键词： ferromagnetism diluted magnetic semiconductor Ni-doped ZnO coprecipitation solid state reaction

Relation of chaos activity characteristics of the cardiac system with the evolution of species

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Chinese science Bulletin 2002年第24期47卷 2042-2048页

作者： WANG Xingyuanschool of electronic and Information engineering, Dalian university of technology, Dalian 116024, china Dalian university of technology School of Electronic and Information Engineering Dalian China

According to the nonlinear theory, the experiments have been conducted on sample ECG (electrocardiogram) signals of healthy human beings, coronary heart disease patients and adult canines. On the basis of the analyses of the power spectra, the computation of the correlation dimension and the Lyapunov exponent to a large number of ECG signals, the following conclusions are shown: through the comparative research, (1) the analyses of the power spectra, the computation of the correlation dimension and the Lyapunov exponent to the ECG signals reflect the whole dynamic characteristics of the hearts, and they may become a new method of researching ECG quantitatively to an early diagnose of heart disease. (2) Under normal physiological conditions the cardiac activities are chaotic, while under pathologic conditions the cardiac activities approach regularity. (3) On the basis of the comparative research of human beings and canines, it is revealed that chaos may be a quantitative index to measure the evolution

关键词： chaos evolution of species ECG signals power spectra correlation dimension Lyapunov exponent.

Effects of Cr_2O_3 doping on the electrical properties and the temperature stabilities of PZT binary piezoelectric ceramics

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Rare Metals 2008年第4期27卷 362-366页

作者： LI Jianhua SUN Qingchi school of electronic and Information and engineering Tianjin University Tianjin 300072 China. school of Materials science and engineering Tianjin University Tianjin 300072 China

The ceramics with Pb1.04Zr0.52Ti0.48O3 ＋ z wt.% Cr2O3 were prepared using the traditional technique. The effects of Cr2O3 doping on the phase structure, the microstructure, and the electrical properties of ceramics were investigated. Meanwhile, the temperature stabilities of the resonant frequency （fx） were studied. The results showed that the △fr/fr,25℃ decreased with the addition of 0.2 wt.% - 0.8 wt.% Cr2O3 as compared with the undoped samples. The minimum value （-0.182%） of △fr/fr,25℃ was obtained for z = 0.6 wt.% Cr2O3 samples that sintered at 1260℃. The values of ε^τ33/ε0 = 1650, tanδ = 0.006, d33 = 328 pC/N, Kp = 0.63, Qm = 2300 were obtained when Cr2O3 was 0.6 wt.%, which exhibited more excellent piezoelectric properties than other compositions such as those with z = 0.2 wt.%, 0.4 wt.%, and 0.8 wt.%, but had a similar value as compared with the tmdoped samples. When the Cr2O3 additive increased, the Curie temperature moved toward low temperature and the changes of resonant frequency changed from positive to negative with increasing temperature.

关键词： ceramics piezoelectric properties temperature stability doping

Construction and cross-correlation analysis of the affective physiological response database

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science china(Information sciences) 2010年第9期53卷 1774-1784页

作者： WEN WanHui1,QIU YuHui2,LIU GuangYuan1*,CHENG NanPu3 & HUANG XiTing4 1school of electronic and Information engineering,Southwest university,Chongqing 400715,china 2College of Computer and Information science,Southwest university,Chongqing 400715,china 3school of Materials science and engineering,Southwest university,Chongqing 400715,china 4school of Psychology,Southwest university,Chongqing 400715,china 1. school of electronic and Information engineering Southwest University Chongqing 400715 China2. College of Computer and Information Science Southwest University Chongqing 400715 China3. School of Materials Science and Engineering Southwest University Chongqing 400715 China4. School of Psychology Southwest University Chongqing 400715 China

Six kinds of emotions,namely joy,surprise,disgust,grief,anger and fear,are elicited from 300 ordinary college students by means of high-rated movie *** signals of galvanic skin response(GSR),heart rate(HR),blood volume pulse(BVP),electrocardiogram(ECG),respiration(Rsp.),facial electromyography(EMG) and two channels of electroencephalography(EEG) from the frontal lobe were recorded while the subjects were watching the affective eliciting *** samples of each kind of signals are analyzed by using random matrix theory(RMT).From the distribution of the eigenvalues and eigenvectors of the correlation matrices of BVP,facial EMG and two EEGs,we find that the statistical properties of these four kinds of signals coincide with the RMT ***,the largest eigenvalue and the corresponding eigenvector component distribution of the correlation matrices of GSR,HR,ECG and *** deviated significantly from the RMT *** experiments also reveal that the correlations between two arbitrary samples of BVP,facial EMG or EEGs does not result from affective response but from random noises,whereas the amplitude variations of GSR,HR,ECG and *** the correlated affective physiological response *** to the data analysis results of RMT,110 features are firstly extracted from the GSR and HR signals,and then a subset of the initial features is selected by using the Backward Selection *** affective data samples each of which is a vector of the features are classified by using a Fisher classifier,and furthermore,the user-independent emotion recognition systems with good prediction performance are constructed during the model selection process.

关键词： affective computing emotion recognition affective physiological response database correlation analysis random matrix theory

基于DSP与FPGA的实时数字信号处理系统设计

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系统工程与电子技术 2004年第11期26卷 1561-1563页

作者：袁俊泉皇甫堪国防科技大学电子科学与工程学院湖南长沙410073

针对测速雷达实时数字信号处理系统的设计问题,提出了一种基于DSP与FPGA的设计新方法。实时信号处理系统中,低层的信号处理算法处理速度要求高,但运算结构相对简单,适用于FPGA进行硬件实现。而高层处理算法控制结构复杂,通信机制强大,... 详细信息

针对测速雷达实时数字信号处理系统的设计问题,提出了一种基于DSP与FPGA的设计新方法。实时信号处理系统中,低层的信号处理算法处理速度要求高,但运算结构相对简单,适用于FPGA进行硬件实现。而高层处理算法控制结构复杂,通信机制强大,适用于DSP软件编程处理。首先简单介绍了该系统所使用DSP的特点,然后对系统的硬件结构及其软件处理进行了详细说明,最后通过实验结果验证了设计新方法的有效性。

关键词：测速雷达实时信号处理数字信号处理现场可编程门阵列

Mechanical and Galvano-chemistry Property Variation within Dissimilar Metal Weld between 1Cr18Ni9Ti and 1Cr13 Stainless Steel

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Journal of Materials science & technology 2010年第5期26卷 477-480页

作者： Yongtao Zhao ,Junhui Dong,Yonglin Ma,Liping Zhao and Xiaobing Pei Material and Metallurgy engineering school,university of science and technology Inner Mongolia,Baotou 014010,china [a] Material and Metallurgy engineering school university of science and technology Inner Mongolia Baotou 014010 china

The purpose of this study is to discuss the microstructure and properties variation of the weld metal in the dissimilar stainless steels during the argon tungsten-arc welding *** of the existence of different materials and chemistry variation within welds,properties,such as tensile and fracture properties and so on,are expected to show spatial *** the study,microstructures were observed by optical and electron *** appearance and uniform structure and typical dendrite structure were observed in welding *** micro-hardness tester and electronic universal stretcher were used to measure the mechanical properties of the weldments and base *** heat affected zone（HAZ） near 1Cr13 hardness is up to peak value of 1150 HV,the strength of weldments is nearly same as austenite stainless *** addition,through seawater immersion test,polarization curves and AC impedance spectroscopy of the weldments and base metals are *** was found that corrosion resistance at welding joint lies between 1C13 and 1Cr18Ni9Ti.

关键词： 1Cr13,1Cr18Ni9Ti Welding joint Mechanical and galvano-chemistry property

An analytical model for nanowire junctionless SOI FinFETs with considering three-dimensional coupling effect

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Chinese Physics B 2016年第4期25卷 344-352页

作者：刘凡宇刘衡竹刘必慰郭宇峰 school of Computer National University of Defense Technology Changsha 410073 China electronic science and engineering Nanjing University of Posts and Telecommunications Nanjing 201131 China

In this paper, the three-dimensional （3D） coupling effect is discussed for nanowire junctionless silicon-on-insulator （SOI） FinFETs. With fin width decreasing from 100 nm to 7 nm, the electric field induced by the lateral gates increases and therefore the influence of back gate on the threshold voltage weakens. For a narrow and tall fin, the lateral gates mainly control the channel and therefore the effect of back gate decreases. A simple two-dimensional （2D） potential model is proposed for the subthreshold region of junctionless SO1 FinFET. TCAD simulations validate our model. It can be used to extract the threshold voltage and doping concentration. In addition, the tuning of back gate on the threshold voltage can be predicted.

关键词： coupling effect threshold voltage subthreshold region SOI FinFETs junctionless front gate,lateral gate back gate

Kinematic Modelling and Control Simulation for 1PS+3TPS Type Hybrid Machine Tool

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武汉理工大学学报 2006年第S1期28卷 181-185页

作者： FAN Shouwen,WANG Xiaobing,HUANG Hongzhong (school of Electro-Mechanical engineering,university of electronic science and technology of china,Chengdu 610054,china) school of Electro-Mechanical engineering University of Electronic Science andTechnology of ChinaChengdu 610054China

A structure scheme for a novel hybrid machine tool (HMT) is proposed in this paper. In the scheme,a 4-DOFs 1PS+3TPS type spatial hybrid mechanism is utilized as main feed mechanism,with assistance of a two direction movable worktable,multi-coordinates NC machining can be realized. In the main feed mechanism,fixed platform is connected with moving platform by three TPS driving links and one PS driving link,one translation DOF and three rotation DOFs can be achieved by it. This type HMT enjoys some advantages over its conventional counterparts:large workspace,good dexterity,etc. Closed form inverse displacement analysis model and inverse kinematic model for main feed mechanism are established. A fuzzy PID control scheme for machining control of HMTs with high tracking precision is proposed aiming at highly nonlinear,tightly coupled and uncertain characteristic of HMTs. Simulation researches for fuzzy PID control of HMTs are carried out. Simulation Results demonstrate the effectiveness and the Robostness of the fuzzy PID controller.

关键词： hybrid machine tool kinematics analysis PID control fuzzy control