1999 Vol.17

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A Smart Composite Structure System of Self-Diagnostic and Self-Adaptive Strength TAO BAOQI, SHI LIHUA, XIONG KE, LIANG DAKAI, YUAN SHENFANG Journal of Applied Sciences    1999, 17 (1): 1-8.   Abstract （299）      PDF（pc） （263KB）（93）       Knowledge map    Save A smart composite structure system with embedded sensors and actuators is developed to realize the function of self-diagnostic and self-adaptive strength. Sensory systems employing optic fibers and piezoelectric elements are investigated. A frame type Shape Memory Allory(SMA) actuator is designed. The smart system can identify loads and damages of the structure by using artificial neural networks and initiate adaptive control to the embedded SMA to improve the structural strength. Related Articles | Metrics | Comments（0）

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A Self-Adaptive Genetic Algorithm in Accelerator Cavity Design YAN XIAOWEI, FAN MINGWU Journal of Applied Sciences    1999, 17 (1): 9-13.   Abstract （360）      PDF（pc） （180KB）（83）       Knowledge map    Save We give a genetic algorithm which is used in the design of accelerator cavity. The algorithm is self-adaptive, that is, it can automatically adjust the genes in a chromosome during evolution according to the constraints on genes, and make the chromosome still belong to the same type structure of cavity. Related Articles | Metrics | Comments（0）

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Investigations of Silk Fibroin Electrochemical Immunosensor and Its Application in Clinical Analysis PENG TUZHI, ZHU FANGMENG, YANG LIJÜ, CHENG QIONG, TANG TING, CHEN JIANYONG Journal of Applied Sciences    1999, 17 (1): 14-17.   Abstract （348）      PDF（pc） （190KB）（89）       Knowledge map    Save In this paper, the preparation of silk fibroin and the ways of immobilizing antibody on silk fibroin are investigated for electrochemical immunosensor. Cross-linking after hydrochloric acid activation, diazo, azide and cross-linking after hydroxylamine activation method are tested for immobilization. In comparison of diazo and azide me thods, the best reponse is obtained when the silk fibroin is activated by hydrochloric acid. The silk fibroin immunosensor is sensitive when measuring α -fetoprotein and the detection limit of 5 μg/L is found. It showes linear response over the concentration range of 10~300 μg/L with correlation coefficient 0 9996. When it is applied to clinical sample analysis, the results are satisfactory. Related Articles | Metrics | Comments（0）

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Non-Stationary ARMA Modeling of Ship Radiation Noise SONG AIGUO, LU JIREN Journal of Applied Sciences    1999, 17 (1): 18-25.   Abstract （325）      PDF（pc） （272KB）（100）       Knowledge map    Save Modeling of ship radiation noise is an important issue of ship target classification. In this paper, the characteristics of ship radiation noise is analyzed, and a novel simple non -stationary ARMA model is proposed for modeling of ship radiation noise. The experiments of modeling of three classes of ship radiation noise recorded on the sea show that the proposed nonstationary ARMA model is correct as well as simple. Related Articles | Metrics | Comments（0）

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Design and Implementation of Global Security System in Open System Environment QIN ZHIGUANG, LIU JINDE Journal of Applied Sciences    1999, 17 (1): 26-32.   Abstract （362）      PDF（pc） （243KB）（78）       Knowledge map    Save Security is very important in open system enviroment because of the systems are easily subject to illegal operations and intentional attacks. In this paper, the open system enviroment based on the trader is introduced, and security requirement and architecture of global security system in the open system enviromemt are analyzed. A design of a global security system used for the open system enviroment is proposed and its prototype implementation is given. Related Articles | Metrics | Comments（0）

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A Linearizing and Decoupling Control Strategy and Its Applications HANG CHENGHUI, WANG JUN Journal of Applied Sciences    1999, 17 (1): 33-38.   Abstract （379）      PDF（pc） （224KB）（94）       Knowledge map    Save In cement production, the input/output model used to describe the static characteristic of raw material mixing system is nonlinear and coupling by interactive variables. Provides a linearizing and decoupling scheme and makes the system linearized and decoupled. It is very significant and convenient for analyzing, designing and implementing the control system. Designs an adaptive decoupling control system based on the improved weighting least squares method, realizes high-accuracy and stronger robustness control. Provides the results of simulation and practical operation and makes a comparison with the conventional adaptive control system. Related Articles | Metrics | Comments（0）

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A Kind of Dynamic Decoupling Method for Wrist Force Sensor XU KEJUN, YIN MING, ZHANG YING Journal of Applied Sciences    1999, 17 (1): 39-44.   Abstract （382）      PDF（pc） （213KB）（127）       Knowledge map    Save The dynamic coupling is a special problem in the investigations of multi-dimensional force sensor's dynamic characteristic. There is no effective method to solve the dynamic coupling so far. This paper proposes a constance dynamic decoupling method of sensor. Based on the dynamic calibrating experiments, the sensor's dynamic models are set up, the decoupling network is designed in discret domain. Both the constructed models and the wrist force sensor are decoupled, and good effects are obtained. The constance decoupling method is simple and practical, and is a new kind of method for solving key problem of other multi-dimensional sensors and compound types of sensors. Related Articles | Metrics | Comments（0）

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A New Method of Surface Temperature Sensor Dynamic Calibration and Transient Temperature Measurement Based on Neural Networks Identification ZHOU CHUAN, HU SHOUSONG, MA QINDI, HU WEILI Journal of Applied Sciences    1999, 17 (1): 45-50.   Abstract （410）      PDF（pc） （223KB）（112）       Knowledge map    Save In this paper, a kind of thin film thermocouple is designed for transient temperature measurement, and a new experimental scheme of temperature transducer dynamic calibration is presented. The mathematical model of transducer has been acquired using artificial neural networks identification. By many groups of experimental data, networks are trained to realized accurate dynamic calibration of transducer. It has been shown that the method presented in this paper provides reliable experimental results and new theory for transient temperature measurement. Related Articles | Metrics | Comments（0）

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A New Identification Method and Its Application for Nonlinear Systems YAN JIHONG, SHI XIAOPING, WANG HONGWEI, WANG ZICAI Journal of Applied Sciences    1999, 17 (1): 51-57.   Abstract （298）      PDF（pc） （239KB）（83）       Knowledge map    Save A new method is presented to identify the structure and parameters of nonli near systems in this paper. Because of the specialties of time-variable systems, an efficient on-line method for both criterion function and parameter identification is obtained by means of the recursive least square method with the forgetting factor, at the same time, the model structure is determined. To reduce the quantity of computation, the Cholesky factorization is used in model estimation, and the proof of the convergence of the algorithm is presented. The new method is applied to the on-line estimation of the F-8 Crusader aircraft longitudinal kinetics model. The results show that the models represented by polynomial and splint functions can be determined efficiently. Related Articles | Metrics | Comments（0）

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Petri Net Models of Grammars and Its Structure Algorithm YAN CHUNGANG, JIANG CHANGJUN Journal of Applied Sciences    1999, 17 (1): 58-63.   Abstract （354）      PDF（pc） （220KB）（76）       Knowledge map    Save In this paper, the Petri net models are established for right linear grammar, expression grammar and property tree formal grammar. The structure algorithms of these models are given and the properties of models are discussed. It is pointed to gene rate language process based on Petri net models by examples. So it is shown that the models are not only intuitional but also dynamic. Related Articles | Metrics | Comments（0）

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Robotic Ground-to-Wall Transition Programming with Real Constraints QIAN JINWU, LUO YI, ZHANG YANAN, WU HUIXING, SHEN YAOZONG Journal of Applied Sciences    1999, 17 (1): 64-69.   Abstract （308）      PDF（pc） （220KB）（64）       Knowledge map    Save The ground -to-wall transition programming of a multi-legged robot with actual constraints is more complicated than that with ideal constraints. After discussing the specific characteristics of actual constraints for a newly-developed leg -pad mechanism with three degrees of freedom, the so-called "virtual pad removal" and "virtual surface" concepts are proposed in order to simplify transition gait programming, and the goal function and influencing factors are discussed. By means of computer simulation of an actual example, the feasibility of transition motion strategy of alternating tripod gait with the robot's body centerpoint moving along elliptic trajectory is verified. Related Articles | Metrics | Comments（0）

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A High-Accuracy Algorithm for the Interpolated Displacement of Grating Signal LIU WENWEN, FEI YETAI Journal of Applied Sciences    1999, 17 (1): 70-74.   Abstract （467）      PDF（pc） （183KB）（153）       Knowledge map    Save In this paper, a high-accuracy algorithm for the interpolated displacement of grating signal is presented which based on Lissajous figure. The key of the algorithm is to separate and correct the DC level drift, the orthogonal error and the amplitude error from imperfect grating signal. As a result, the accuracy of the interpolated displacement of grating measurement system can be raised. Experiments and comparisons have proved the fact that the algorithm is correct and effective. Related Articles | Metrics | Comments（0）

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The Upper Bound Analysis of Section Extrusion Process HUANG XIANG, ZHOU RURONG Journal of Applied Sciences    1999, 17 (1): 75-82.   Abstract （411）      PDF（pc） （293KB）（94）       Knowledge map    Save An upper bound model for analyzing extrusion process is proposed. In this model, the deformation zone surface is constructed by interpolating the arbitrarily cross-sectional shapes of the billet and the section, the axial velocity distribution is considered in the admissible velocity field, the pseudo-independent parameters in the deformation zone surface and the admissible velocity field are calculated by optimum method. Analytical results show the upper bound method presented here is accurate, the calculating results are coincident with the experimental ones. Related Articles | Metrics | Comments（0）

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The Mathematical Model of Sperm Guidance System of Micropyle of The Teleost WU KUNMING, SONG HUICHUN, SHEN QIZHANG, LIU GENHONG Journal of Applied Sciences    1999, 17 (1): 83-91.   Abstract （375）      PDF（pc） （334KB）（90）       Knowledge map    Save After finding the whirlpool like structure of micropyle of the mature egg of Misgurnus anguillicaudatus in 1987, we discovered again that there is a radiate structure. This article establishs a general mathematical model of the teleost's micropyle by building a mathematical model of sectional curves of micropyle of Protosalanx hyalocranius, Megalobrama terminalis and studying the cause of the kind of curves. Because the conclusion that it saves work most that sperms travels along the micropylar camber. Thus further proving that exists unnegligible mathematical and physical dynamic factors besides the chemical explanation during the teleosts's sperm entering micropyle, which is mechanical impetus acts. Both sides bring out the best in each other and form a complete sperm guidance system of micropyle. Related Articles | Metrics | Comments（0）

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The Study for the Number of Reaction Coefficients in Method of Reaction Coefficient in Unsteady Heat Transmission of Wall HE JIAPENG, LIU HUANCHENG, FANG XIANDE, WANG DONGFANG Journal of Applied Sciences    1999, 17 (1): 92-98.   Abstract （341）      PDF（pc） （211KB）（72）       Knowledge map    Save According to building's characteristics of China, the walls are divided into three mass levels:heavy、middle and light from thinking of heat transmission. Using theory about unsteady heat transmission of wall and simulated calculation by computer, a definite value of numbers of reaction coefficients is proposed in this paper. Method of heat transfer reaction coefficient is perfected and a better condition is produced for use of this method. Related Articles | Metrics | Comments（0）

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Robust H∞ Control of Rotor System with Structural Uncertainty LUO ZHIMING, GU JIALIU Journal of Applied Sciences    1999, 17 (1): 99-102.   Abstract （369）      PDF（pc） （154KB）（75）       Knowledge map    Save Based on the H∞ control theory, a robust H∞ controller was found out for rotor systems with uncertainty of mass and stiffness. For the model rotor system, simulation shows that robust H∞ controller can rejected the imbalance response effectively. Related Articles | Metrics | Comments（0）

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Study on the Mechanism of Phase Separation of Non-Crystalline Materials DUAN RENGUAN, LIANG KAIMING, GU SHOUREN, CHEN XUANLING Journal of Applied Sciences    1999, 17 (1): 103-107.   Abstract （322）      PDF（pc） （229KB）（84）       Knowledge map    Save According to the classical theory of linearized spinodal decomposition kinetics and nucleation -growth kinetics, after a series of mathematical calculation, the following results were obtained. When the phase separation began to advance in the field of unstable(spinodal), there was not a regular relation between the size of non-uniform region and the time, but in the field of metastable(nucleation-growth), the square of the size of non -uniform region was in proportion to the time. The rightness of above results was tested by experiments in the related references. Related Articles | Metrics | Comments（0）

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A Theoretical and Experimental Study on the Perturbation of Solid Acoustic Resonator CHEN GELIN, ZHENG HUAGE Journal of Applied Sciences    1999, 17 (1): 108-113.   Abstract （315）      PDF（pc） （216KB）（62）       Knowledge map    Save Using acoustic signature for nondestructive testing (NDT), relation between peturbation and acoustic signature of resonator is studed. The resonance frequencies and the field shapes of samples with or without crack are calculated by finite element method(FEM). Corresponding experiments are carried out for comparison and the results are conformed well. All of this are guide for NDT with acoustic signature inspection. Related Articles | Metrics | Comments（0）

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The Reduction of Flow Noise by Low Surface Energy Coating TIAN JUN, XUE QUNJI Journal of Applied Sciences    1999, 17 (1): 114-118.   Abstract （306）      PDF（pc） （181KB）（69）       Knowledge map    Save This paper aims at predicting the levels of the boundary layer noise as a function of the speed and the frequency, which based on the results obtained by flow-noise studies performed with a rotating cylinder in the boundary layer of the test section of water tunnel. The coating containing rich low surface energy materials is a hydrophobic and porous material. The covered coating model provides low dispersive and polar components of surface energy by decreasing bonds between water and coating, thus, the flow noise of the covered coating model can be decreased by 4~18dB in 4~80kHz. Related Articles | Metrics | Comments（0）

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Oxidation Kinetics of Microcrystalline Fe3Al WANG YONGGANG, HE YEDONG, ZHU RIZHANG Journal of Applied Sciences    1999, 17 (1): 119-121.   Abstract （328）      PDF（pc） （120KB）（109）       Knowledge map    Save The oxidation Kinetics of microcrystalline Fe3Al was compared with that of normal grain Fe3Al at 1000℃ in air. It was shown that the oxidation rate of microcrystalline Fe3Al was heavily decreased. The oxidation kinetics of microcrystalline Fe3Al failed to obey the parabolic law. It was suggested that the oxide scale turned into microcrystalline state since the nuclear probability of oxide was extremely increased. The short circuit diffusion through oxide scale was dominant. An expression, x4=kpt, has been derived for the oxidation kinetics of microcrystalline Fe3Al based upon the model of short circuit diffusion. Related Articles | Metrics | Comments（0）

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The Conjugate Gradient-Fast Multipole Method(FMM) for Electromagnetic Scattering Problems ZENG LIN, NI WEILI, XIAO YANMING Journal of Applied Sciences    1999, 17 (1): 122-126.   Abstract （368）      PDF（pc） （187KB）（64）       Knowledge map    Save In this paper, CG -FMM is applied for the solution of RCS in electromagnetic scattering problems. Careful discussion is made on the RCS solutions for various 2 -D scatterers. Several parameters and the iterative terminate criterion have been presented. Comparing with other methods, this algorithm has more advantage when electrically large objects are concerned. Related Articles | Metrics | Comments（0）

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A New Method for the Determination of Path Interval in Five-Axis NC Machining of Free Form Surfaces ZHOU YANHONG, ZHOU JI Journal of Applied Sciences    1999, 17 (2): 127-133.   Abstract （362）      PDF（pc） （255KB）（64）       Knowledge map    Save In this paper, a rigorous expression for calculating the path interval, which is based on analyzing the enveloping movement of cutters is obtained and is fit for five-axis NC machining of free form surfaces with general torus cutters. The practical algorithm and measures for improving the calculating efficiency are given. The factors that influence the path interval in five-axis surface machining are discussed, and the approaches to optimizing the tool path are also explored. Related Articles | Metrics | Comments（0）

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Numerical Simulation Method for Electrical Heating Reservoir to Enhance Heavy Oil Recovery WANG YUDOU, GUAN JITENG, WANG DIANSHENG Journal of Applied Sciences    1999, 17 (2): 134-141.   Abstract （391）      PDF（pc） （273KB）（71）       Knowledge map    Save According to the mechanisms of electrical heating heavy oil reservoir, the mathematical models and discrete models of current field, pressure field and temperature field are developed; The algorithm of these models are discussed and the computational software is tailored; The results of numerical calculation are given; The results show electrical heating is an effective method for heavy oil recovery. Related Articles | Metrics | Comments（0）

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Mean Field Equations for High Density Situation of Fukui-Ishibashi Traffic Flow Models WANG BINGHONG, WANG LEI, HUI PAKMING, HUI PAKMING Journal of Applied Sciences    1999, 17 (2): 142-147.   Abstract （359）      PDF（pc） （220KB）（58）       Knowledge map    Save In this paper, Fukui Ishibashi one dimensional traffic flow cellular automaton model for high speed vehicles (vmax=M>1) with stochastic delay is studied from the point of view of inter-car spacings. Starting from the basic equation describing the time evolution of the number of empty sites in front of each car, the concepts of inter-car spacing longer (shorter) than M are defined, the occurrence probabilities of longer spacing and shorter spacing are calculated respectively. For the situation of high density (d ≥ 1/M), it is proved that the inter-car spacing longer than M will be shorten, any initial configuration will approach to the steady state for which all the inter-car spacing belong to shorter type. Hence it is proved strictly that for general Fukui -Ishibashi traffic flow model with stochastic delay, when the car density is high, the fundamental diagram for the traffic flow asymptotic steady state does not change as the delay probability. Related Articles | Metrics | Comments（0）

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Context -Sensitive Automatic Chinese Word Segmentation and Lexical Preprocessing HUANG HEYAN, LI YUSHENG Journal of Applied Sciences    1999, 17 (2): 148-155.   Abstract （416）      PDF（pc） （270KB）（91）       Knowledge map    Save In this paper, a context -sensitive automatic Chinese word segmentation and lexical preprocessing for Chinese-English machine translation system is proposed. This algorithm incorporates with improved MM matching and rule based context -sensitive ambiguity resolution by taking advantage of large amount of syntax, semantic and common sense knowledge in the lexicon of MT system. Its accurate rate reaches up to 99%. On the same time, in this algorithm, some lexical phonomena, such as reduplication word, function word, etc. are also processed, so as to deduce the amont of words in lexicon entry, and facilitate the parsing of a Chinese sentence. Related Articles | Metrics | Comments（0）

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An Information Theory Based Method for Blind Separation of Sources LIU JU, LU ZIYI, HE ZHENYA, MEI LIANGMO Journal of Applied Sciences    1999, 17 (2): 156-162.   Abstract （401）      PDF（pc） （246KB）（91）       Knowledge map    Save Based on the assumption of statistics independent, we proposed an mutual information minimizing object function where Edgeworth expansion is used. This function can be explained clearly and its minimization would make the outputs independent. Computer simulation shows the validity of proposed method. Related Articles | Metrics | Comments（0）

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A Normalized Fast Blind Adaptive Beamforming Algorithm HE ZHENYA, CHEN YUXIN Journal of Applied Sciences    1999, 17 (2): 163-168.   Abstract （308）      PDF（pc） （217KB）（84）       Knowledge map    Save LS SCORE is an adaptive beamforming algorithm with the array manifold unknown. However, its slow convergence speed is often unable to meet the requirements for use. A new algorithm having fast tracking ability and permitting large dynamic input range is present in this paper. The experiment results have shown that this algorithm has better performance than LS SCORE. Related Articles | Metrics | Comments（0）

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Electromagnetic Scattering From Two-Dimensional Electrically Large Multi-Conducting Bodies CHEN XIAOGUANG, JIN YAQIU Journal of Applied Sciences    1999, 17 (2): 169-176.   Abstract （309）      PDF（pc） （294KB）（82）       Knowledge map    Save Numerical simulation of electromagnetic scattering from electrically large multiconducting bodies has been implemented by using the exact fast multipole method (FMM). Scattering cross sections of four clustered, conducting cylinders and the distribution of electricity on the surfaces are calculated by the FMM. The calculation speed of FMM is much superior to the conventional MOM's. The functional dependence of RCS and surface current distribution upon the distance between the cylinders, and other parameters are numerically discussed. Related Articles | Metrics | Comments（0）

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Study on Characteristics of SINR Polarization Filter in the Partially Polarized Case WANG XUESONG, XIAO SHUNPING, CHEN ZHIJIE, ZHUANG ZHAOWEN Journal of Applied Sciences    1999, 17 (2): 177-182.   Abstract （325）      PDF（pc） （223KB）（64）       Knowledge map    Save In this paper,polarization characteristics of SINR filter are studied in the most general partially polarized case.Emphatically,the band characteristics of filter are discussed while formulae of filter's band and its area are derived.A novel methodology to solve the optimal filter's parameters is presented by taking advantage of the analysis of band characteristics,by which the analytic expression of optimal filter's parameters can be derived directly. Related Articles | Metrics | Comments（0）

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A Novel Method for Microwave Imaging of Two Dimensional Electromagnetic Target in Half Space QING ANYONG, LI JING, REN LANG, ZHONG SHUNSHI Journal of Applied Sciences    1999, 17 (2): 183-188.   Abstract （356）      PDF（pc） （238KB）（60）       Knowledge map    Save A novel method for microwave imaging of two-dimensional lossless electromagnetic target which buried in half space using time-domain scattering data is presented in this paper.It is an iterative method derived volume equivalence principle,variation principle,Fourier transform.We name it as time-domain variational iterative method(TVIM).In each iteration,both the direct and inverse problems are solved once.The direct problem is solved by finite-difference time-domain(FDTD) method and the inverse problem is solved iteratively.Some Typical numerical results are given to show its inversion performance such as converging property,ability to invert arbitrary targets,tolerance of random noise et al.Comparision with our former method is also done.Those factors which make TVIM performs better are investigated. Related Articles | Metrics | Comments（0）

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A Study of Parallel Corner-Fed Square Microstrip Antenna GAO SHICHANG, ZHONG SHUNSHI Journal of Applied Sciences    1999, 17 (2): 189-193.   Abstract （460）      PDF（pc） （180KB）（70）       Knowledge map    Save The parallel corner-fed square microstrip antenna is studied. A method of analysis of input impedance properties is developed, and the closed-form expressions are derived. The Multiport network model, the cavity theory, the segmentation technique and the desegmentation technique are combined in the present approach. The characteristics of parallel corner-fed structure are fully included in the method. For antenna design, more accurate results can be conveniently obtained from it than those from the cavity theory. The experimental results validate the theory. Related Articles | Metrics | Comments（0）

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Free Space Mode Approximation for Radiation Modes of a Slab Waveguide and Its Application WANG ZIHUA, LI MINGSHENG Journal of Applied Sciences    1999, 17 (2): 194-198.   Abstract （400）      PDF（pc） （183KB）（70）       Knowledge map    Save Taking the symmetric slab waveguide as an example,we show that radiation modes of a weakly guiding planar optical waveguide can be approximated by the free space modes,their field expression and normalization constants are simple and understandable physically and can be obtained directly without any calculation.By applying this approximation,the far field and radiation loss calculations caused by random wall imperfections have been significantly simplified. Related Articles | Metrics | Comments（0）

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On The Equivalence of Green Functions to Integral Transform Technique for the Problem of Heat Conduction HU HANPING, GE XINSHI, CHENG SHUXIA Journal of Applied Sciences    1999, 17 (2): 199-205.   Abstract （474）      PDF（pc） （232KB）（115）       Knowledge map    Save A new method of solving Green function for the problem of heat conduction is presented and a general purpose Green function representative by which the equivalence of Green functions to integral transform technique can be proved. Related Articles | Metrics | Comments（0）

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The Optimal Performance of a Stirling Heat Engine SU GUOZHEN, YAN ZIJUN Journal of Applied Sciences    1999, 17 (2): 206-210.   Abstract （380）      PDF（pc） （185KB）（55）       Knowledge map    Save The optimal performance of a Stirling heat engine with heat resistance, heat leak and regeneration loss is studied. The fundamental optimal relation is deduced, and the influences of various irreversible factors on the performance of the heat engine are discussed. The conclusions obtained here may provide some new theoretical guides to the optimal design of Stirling heat engines. Related Articles | Metrics | Comments（0）

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A Circuit Test Generation Method Based on Optimization PAN ZHONGLIANG, ZHANG GUANGZHAO, CHEN GUANGJU Journal of Applied Sciences    1999, 17 (2): 211-215.   Abstract （258）      PDF（pc） （190KB）（72）       Knowledge map    Save Test pattern generation for integrated circuits is an important and complex problem. An optimization method of test pattern generation for digital circuits is proposed in this paper. In the method, a characteristic function for each basic gate circuit and the constrained network for the circuit under test (CUT) are defined, the test patterns for a fault can be obtained by means of a simulated annealing algorithm. A new algorithm, namely annealing descent algorithm(SDA), is presented, which enhance the performance of conventional simulated annealing method, and accelerate the test generation process further. Related Articles | Metrics | Comments（0）

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Control Method of Robot Position and Posture Based Genetic Algorithms CAI JINDA, LI HAOLIN Journal of Applied Sciences    1999, 17 (2): 216-220.   Abstract （290）      PDF（pc） （181KB）（73）       Knowledge map    Save A new algorithm for control of position and posture of robot is presented in this paper, which based on genetic algorithm. According to problems of control of position and posture of robot, the methods to improve parameter search procedures are discussed as well. Finally, the method is validated by simulation experiments. Related Articles | Metrics | Comments（0）

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Electrochromic Characteristics of Electron-Beam Evaporated Nickel Oxide Films WU YONGGANG, WU GUANGMING, NI XINGYUAN, ZHOU ZHEN, ZHANG HUIQING, WU XIANG Journal of Applied Sciences    1999, 17 (2): 221-226.   Abstract （312）      PDF（pc） （224KB）（87）       Knowledge map    Save In this paper, nickel oxide films are deposited by rapid electron-beam evaporating NiO powder pellet in the presence of a selected oxygen pressure. The deposited films show superior electrochromic properties without activation process, transmittance variation of 23.4%~92.0% at 550nm can be achieved at the second cycle of cyclic voltammetry between -0.6 and +0.8V. In the initial dozens of cycles, the transmittance of the colored state is lowered gradually, but the transmittance of the bleached state retains the same as the original state. The anodic and cathodic current increase, while the cathodic current peak shifts to lower potentials with the cycling. The maximum transmittance variation reachs 20.5%~77.4%in the photopic vision spectra and 27.2%~69.1% in the solar spectra when the cycling reachs stable. Switching times for coloration and bleaching are 15s and 7s respectively. Related Articles | Metrics | Comments（0）

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Time Series Forecasting Based Neural Networks and Its Application CHEN XIYUAN, CHENG QIMING, WAN DEJUN, YU YONG Journal of Applied Sciences    1999, 17 (2): 227-231.   Abstract （415）      PDF（pc） （185KB）（53）       Knowledge map    Save This paper proposes the modeling and forecasting method by neural networks for marine strapdown gyro which based on time series analysis, and makes research for random drift rate of gyro applied for strapdown attitude systems. Related Articles | Metrics | Comments（0）

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Study on Plasma Diagnostics of Double -Glow Plasma Surface Alloying Technique LI CHENGMING, XU ZHONG, TIAN LINHAI, WANG JIANMING, SU YONGAN, XIE XISHAN, DONG JIANXIN Journal of Applied Sciences    1999, 17 (2): 232-236.   Abstract （367）      PDF（pc） （189KB）（93）       Knowledge map    Save Langmuir probe technique is used for the plasma diagnostics of double glow plasma surface alloying technique. It has been shown that the plasma potential and the electron temperature decrease and the plasma density increase, with the rise of the gas pressure and the source electrode voltage and substrate cathode voltage. Under suitable processes condition, the unequal potential hollow cathode effect is produced between the source electrode and substrate cathode. The plasma density is increased apparently from 1010 to 1012 cm-3. Related Articles | Metrics | Comments（0）

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Temperature Rising Behavior of Sr-Ni-La Composite Oxide in Microwave Field BI XIANJUN, DUAN AIHONG, WANG ZHEN, HONG PINJIE, DAI SHUSHAN Journal of Applied Sciences    1999, 17 (2): 237-240.   Abstract （384）      PDF（pc） （155KB）（151）       Knowledge map    Save In this paper, a series of Sr-Ni-La composite oxides are prepared by dipping, and the influences of composition preparing condition of catalyst and anode current on the temperature rising under microwave irradiation are studied. The results show that all oxides could rise temperature, moreover the preparing conditions and the current have effects on the temperature rising. Related Articles | Metrics | Comments（0）

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