1998 Vol.16

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A Reliability Model for RealTime Multitasking Software LEI HANG, XIONG GUANGZE, LIU JINDE Journal of Applied Sciences    1998, 16 (1): 1-5.   Abstract （283）      PDF（pc） （183KB）（64）       Knowledge map    Save By taking the task modulars as a basic testing unit, an evaluation model of the real-time multitasking software is presented in this paper. Since the parameters in the model are easy to be analysed and tested, this model is useful in evaluating the reliability of the real-time multitasking software. Related Articles | Metrics | Comments（0）

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An Image Edge Detection Algorithm Based on Two-Dimensional Wavelet Transforms XIE MEI, MA ZHENG, GU DEREN Journal of Applied Sciences    1998, 16 (1): 6-11.   Abstract （414）      PDF（pc） （208KB）（125）       Knowledge map    Save The sharp variation of gray levels of an image, measured at different scales, can be detected from the local maxima of its wavelet transform. In this paper we describe an algorithm that can extract the edges of an image. The model is based on the two-dimensional dyadic wavelet transform. It provides information of the image boundaries by determining the local maxima of the two-dimension wavelet transform of an image at dyadic scale. Experimental results shows that this method is quite effective. Related Articles | Metrics | Comments（0）

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Applications of Exponential Sums to Spreading Sequences Designs LI CHAO Journal of Applied Sciences    1998, 16 (1): 12-17.   Abstract （304）      PDF（pc） （220KB）（91）       Knowledge map    Save Let p be an odd prime, n,e,m and r be integers satisfying the following conditions:n=em,1 ≤ r ≤ e-1,(r,e)=1. Let k be a complex primitive pth root of unity and J:z→ktrm1(z) be the nontrivial addition character of the finite field Fq(q=pm). For every pair a,b∈Fqe,Let e(a,b) denote the exponential sum:e(a,b)=∑x∈FqeJ[trmn(ax+bxqr+1)], where trmn(°) denotes the trace function of Fqe over Fq. In this paper we determined the values of the exponential sum e(a,b) and discussed the applications of exponential sums in spreading sequences designs. Related Articles | Metrics | Comments（0）

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A Polynomial Time Algorithm for Maximum Lateness in Single Machine Scheduling with Batching SUN SHIJIE, ANDREWS BOADI, LIU ZHAOHUI Journal of Applied Sciences    1998, 16 (1): 18-23.   Abstract （358）      PDF（pc） （220KB）（71）       Knowledge map    Save N jobs arrive at same time and need to be processed in batches by the same machine. The jobs in the same batch are processed successively and the completion time of all the jobs in the same batch is defined as the completion time of the batch they belong to. There exists a set up time whenever the machine begins to process a new batch. Taking the maximum lateness as objective function, this paper develops a polynomial time algorithms for the processing sequence of the n jobs given or not given. Related Articles | Metrics | Comments（0）

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A Continuum Percolation Model of Cubic Particles for Dispersed Ionic Conductor The Effects of Particle Size on Critical Threshould and Conductivity PANG QIANJUN Journal of Applied Sciences    1998, 16 (1): 24-31.   Abstract （358）      PDF（pc） （278KB）（104）       Knowledge map    Save A continuum overlapping model of cubic particles is introduced based on ge neralized lattice model of discrete overlapping particles for the dispersed ionic conductors. By using this model, the relationship between the concentration and the density of DIC system is found out. With the effective medium approximation(EMA), the effects of the particle size on the critical threshould and condutivity are studied and discussed. Related Articles | Metrics | Comments（0）

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Single Chip FPGA-Based Data Acquisition Module for Multichannel VFC Signals GONG XIANGDONG Journal of Applied Sciences    1998, 16 (1): 32-36.   Abstract （393）      PDF（pc） （186KB）（73）       Knowledge map    Save The hardware design and implementation of a data acquisition module for 8 channel voltage-to-frequency conversion (VFC) signals are described. This module is mainly comprised of a counting-buffering unit, a FIFO RAM, a RS232C serial communication port and a control unit. The module is implemented in a single chip Xilinx field programmable gate array (FPGA). With Xilinx FPGA, the benefits from the design such as short time to market, high reliability and compactness for the whole system can be obtained. Related Articles | Metrics | Comments（0）

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“Fictitious Circuits” and Its Applications in the Solution of Large-Scale Networks by Tearing LI FENG, DENG TIEJUN Journal of Applied Sciences    1998, 16 (1): 37-43.   Abstract （385）      PDF（pc） （244KB）（67）       Knowledge map    Save Fictitious Circuits——a new concept is presented for analyzing large-scale networks by tearing. The concept unifies branch tearing, node tearing and hybrid tea ring, i. e. the concept is more general and includes all the previous tearing as special ca ses. Based on fictitious circuits, the tearing equations of Bordered Brock Diagonal form can be founded conveniently and directly. The method presented in this paper is usable for the solution of large-scale networks by any kind of tearing. Related Articles | Metrics | Comments（0）

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Micromagnetic Calculation of the Magnetic Pro perties for the Nanometerscale TwoPhase Exchange-Coupling Permanent YANG SHIQING, HE SHIGUANG, WANG HAOCAI, ZHANG WANLI Journal of Applied Sciences    1998, 16 (1): 44-50.   Abstract （319）      PDF（pc） （257KB）（77）       Knowledge map    Save Based upon micromagnetics and variational method of the total free energy of the magnets, we derived Brown equation of the magnetization for the aligned nanom-eterscale two-phase exchange-coupling permanent. For the case of the aligned two-phase exchange-coupling permanent, this Brown equation is similar to static Schrdinger equation. By means of the method of resolving the central-field problem, we obtained the dependence of the nucleation fields of the two-phase exchange-coupling permanents vary with the particle sizes of hard magnet phase. It's shown that the excellent magnetic properties of permanents are obtained when the sizes of the twophase crystals are smaller than the critical sizes, respectively. The present calculation results can be used to explain the known experimental results and provide the theoretical reference for the preparing of the giant-magnetic energy product permanents. Related Articles | Metrics | Comments（0）

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Macromodel of MCM Interconnection Delay and Its Physical Scaling LAI JINMEI, LIN ZHENGHUI Journal of Applied Sciences    1998, 16 (1): 51-55.   Abstract （339）      PDF（pc） （182KB）（72）       Knowledge map    Save Macromodel of MCM interconnection delay is developed in this paper. With this model it is shown that the most important parameters dominating the performance of MCMs are the average distance between the chips and the size of the load capacitance. Related Articles | Metrics | Comments（0）

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Influence of the Stochastic Factors in Soliton Transmission System and Its Suppression CHEN MINGHUA, WEN YANGJING, YANG XIANGLIN Journal of Applied Sciences    1998, 16 (1): 56-61.   Abstract （356）      PDF（pc） （216KB）（76）       Knowledge map    Save Transmission properties of soliton system influenced jointly by stochastic variation of fiber parameters, ASE noise of amplifiers and interaction between neighboring solitons are considered in this paper. It is shown that stochastic variation of fiber parameters can change only the amplitude and energy of solitons when it exists alone in system and the arrival time jitter can be denied. However, when it exists with ASE noise and interaction, arrival time jitter of soliton becomes serious. It is proven that the jitter can be suppressed by filters. Related Articles | Metrics | Comments（0）

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Deforming Force Relationship Between Axisymmetric State and Plane Strain State in Extrusion Technology LI SHUANGYI, ZHOU LIHUA, MENG FANZHEN Journal of Applied Sciences    1998, 16 (1): 62-67.   Abstract （412）      PDF（pc） （218KB）（57）       Knowledge map    Save Except slip line solution for plane strain state, there is no accurate solution for axisymmetric state in plastic forming problem so that it is quite difficult to find the deforming force relationship between the two kinds of states. After a great amount of investigation, analysis and experiments of numeric solution formula in extrusion technology, corrcspondent optimal formula are put forward in this paper. Moreover, by means of formula comparison method, the deforming force relationship is found to be 1.7~2 for forward extrusion and 1.75~2.2 for compound extrusion. Related Articles | Metrics | Comments（0）

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Study on the Directivity of Gauss Beam Generated Thermoelastic Ultrasound in Non-Metallic Solids WU YAPING, SHI DUFANG, HE YULONG Journal of Applied Sciences    1998, 16 (1): 68-73.   Abstract （366）      PDF（pc） （224KB）（60）       Knowledge map    Save The directivity of Gauss beam generated ultrasound in non-metallic solids are stutied theoretically. We solve the thermoelastic wave equations by means of the integral transform mathod and obtain analytic expressions of the wave displacements in the far-field. We also present directivity patterns of both longitudinal and shear waves, discuss the effects of optical absorption coefficient on the diretivity of the ultrasound waves and compare them with the experimental results. Related Articles | Metrics | Comments（0）

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AnalysisofLaminarFlowand Heat Transfer of Falling Liquid Film Along a Vertical Plate in the Developing Region SHI JINSHENG, SHI MINGHENG Journal of Applied Sciences    1998, 16 (1): 74-80.   Abstract （306）      PDF（pc） （239KB）（87）       Knowledge map    Save The characteristics of laminar flow and heat transfer of falling liquid film along a vertical plate in the developing region are analyzed by using the boundary layer similarity solution. The relationship between the developing length of hydrodynamic and thermal boudary layer and heat transfer coefficient for constant surface temperature are obtained. Related Articles | Metrics | Comments（0）

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Study on Neural Network Diagnosis System Based on Characteristics of Flame Image YANG HONGMIN, TANG XIAOJUN, LIU YONG, GU FAN, XU YIQIAN Journal of Applied Sciences    1998, 16 (1): 81-87.   Abstract （320）      PDF（pc） （266KB）（73）       Knowledge map    Save The image characteristics of gas flame and pulverized coal flame is studied experimentally and theoretically by using computer digital image processing technology. Based on flame characteristic extraction, the theory of neural network is applied to study the flame recognition. The method of flame combustion recognition is proposed and a practical intelligent flame diagnosis system is developed. Related Articles | Metrics | Comments（0）

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Phase Diagrams and Relationships Between Energetic Parameter f(r) and Ratio of Crystallization for Nine LiCl-M'Cl2-MF Molten Salt Systems YAN LICHENG, FANG JIANHUI, LU WENCONG, YANG JINXIU, XU JINGYAN Journal of Applied Sciences    1998, 16 (1): 88-93.   Abstract （337）      PDF（pc） （230KB）（63）       Knowledge map    Save In this paper, the relationship between the energetic parameter f(r) of molten salt system and the ratio of primary crystallization compound has been exa mined. A number of multi component molten salt systems of LiCl-M'Cl2-MF have been tested and their corresponding phase diagrams have been obtained. Related Articles | Metrics | Comments（0）

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De-Amine (Tetraethylammonium) Effects of Microwave on the Structure and Acidity of Zeolite β YANG XINGBIN, HE JING, LI FENG, DUAN XUE, WANG ZUOXIN Journal of Applied Sciences    1998, 16 (1): 94-99.   Abstract （359）      PDF（pc） （213KB）（85）       Knowledge map    Save The effects of the thermal decomposition of tetraethylammonium (template) by microwave on the surface acidity and structure of zeolite β are studied by TPDE,TPD and XRD. Results show that (1) the most part of template is eliminated after zeolite β has been irradiated for 40 minutes by microwave, (2) the surface acid amount evidently increases and β has three types of acidic sites which are of different strength, and (3) the strength of strong acid sites remarkly decreases compared with the traditional method. In addition, the method to remove the template can successfully maintain the crystallinity of zeolite β. Related Articles | Metrics | Comments（0）

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Investigation of Far Region Fields Scattered From Fractal Surfaces in Frequency and Time Domain WANG MINXI, LI JING, REN LANG Journal of Applied Sciences    1998, 16 (1): 100-105.   Abstract （323）      PDF（pc） （223KB）（93）       Knowledge map    Save In this paper, fractal function is used to model the rough surface for investigating the interaction of incident plane wave and rough surface in frequency and time domain. The different characteristics for different parameters of the fractal function in time domain are presented. Related Articles | Metrics | Comments（0）

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Collision Detection Between Convex Polyhedra:a Foundation for Collision -Free Path Planning ZHU XIANGYANG, ZHONG BINGLIN, XIONG YOULUN Journal of Applied Sciences    1998, 16 (1): 106-111.   Abstract （423）      PDF（pc） （219KB）（153）       Knowledge map    Save This paper deals with the collision detection problem by investigating the distance function between 3-D convex polyhedra in the sense of L1 metric and L∞ metric. The characteristics of both the L1 distance and L∞ distance, such as their topological property, Lipschitz continuity, equivalence to the Euclidean distance, etc, are investigated. The linear programming based approaches for the evaluating of L1 distance and L∞ distance are also proposed. The results of this paper form a basis of collision free path planning for robot manipulators. Related Articles | Metrics | Comments（0）

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The Engineering Improvement for Weakening the Bad Effect of Natural Wind on the Dry Cooling Towers HAO ZHENGUO, SHI JINLING, WEI QINGDING, ZHANG BOYIN Journal of Applied Sciences    1998, 16 (1): 112-120.   Abstract （434）      PDF（pc） （312KB）（98）       Knowledge map    Save The bad effect of natural wind on dry cooling towers (Heler type) is studied. And an engineering improvement is suggested to weaken this effect. Related Articles | Metrics | Comments（0）

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Calculation of the Speed -Temperature Relationship in Axisymmetric Extrusion Process HUANG XIANG, LIAO WENHE, ZHOU RURONG Journal of Applied Sciences    1998, 16 (1): 121-126.   Abstract （388）      PDF（pc） （229KB）（60）       Knowledge map    Save A finite difference model of heat balance in axisymmetric extrusion process is constructed. In this model, a kinematically admissible velocity field is adapted and a rise in temperature is calculated by considering the heat generation due to deformation and friction, heat transfer and material flow, etc. Using this model, not only the rise in temperature during constant speed -extrusion process is calculated, but also the profile of ram speed temperature for simulant constant exit temperature extrusion and constant temperature extrusion under a specified exit temperature is calculated. The results are well in agreement with those of the experiments. The model can be used to optimize process parameters of hot extrusion. Related Articles | Metrics | Comments（0）

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Study on Vibration Characteristics of Micro-Displacement Actuactor WEN RENLIN, YAN JINGPING, QIU XIAOHAN Journal of Applied Sciences    1998, 16 (2): 127-132.   Abstract （333）      PDF（pc） （215KB）（58）       Knowledge map    Save Micro-displacement actuator for ultrasonic vibration cutting is designed. The vibration characteristics and matching circuits are analyzed. Experimental results prove that the theory analysis are right. This actuator can also be used to error compensation or precision cutting. Related Articles | Metrics | Comments（0）

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A Cascade Design of Digital Bandpass Filter WAN WANGGEN, YU XIAOQING Journal of Applied Sciences    1998, 16 (2): 133-139.   Abstract （268）      PDF（pc） （239KB）（104）       Knowledge map    Save A prototype ⅡR digital bandpass filter is derived from an analogous bandpass filter by using bilinear transformation. The formulas relating the digital bandpass filter's coefficients with its center frequency and bandwidth are obtained. Using N sections of such digital bandpass filter, a cascade ⅡR digital bandpass filter is constructed. Based on the specifications and the formulas given, the parameter N and bandwidth of prototype ⅡR digital bandpass filter can be obtained, and the unknown cascade ⅡR digital bandpass filter can be finally determined. The filter has few coefficients and a simple structure and it is easy to be designed. It is especially suitable for its implementations when using DSP. Related Articles | Metrics | Comments（0）

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On the Asymptotic Analysis of Cramer-Rao Bound for Time Delay Estimation YIN CHENGYOU, XU SHANJIA, WANG DONGJIN Journal of Applied Sciences    1998, 16 (2): 140-148.   Abstract （349）      PDF（pc） （315KB）（83）       Knowledge map    Save ln this paper, starting with the most elementary probability formula of Fisher matrix for time delay estimation, a rigorous asymptotic expression of Fisher matrix for time delay, Doppler shift and its higher derivative joint estimation is introduced by using the asymptotic equivalent property of Toeplitz matrix, circulant matrix, and the specrtum characteristic of circulant matrices. The present result is more accurate than the commonly used one. A comparison between the two results shows that under certain conditions the agreement of the two results is excellent. Related Articles | Metrics | Comments（0）

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Viterbi Decoding Algorithm and Its FPGA Implementation for K=9 Convolutional Codes HU AIQUN, PANG KANG, SU JIE Journal of Applied Sciences    1998, 16 (2): 149-156.   Abstract （312）      PDF（pc） （283KB）（94）       Knowledge map    Save This paper deals with the error control problem in digital mobile communications. The scheme which employs the maximum likelihood Viterbi algorithm for decoding the K=9 convolutional data is studied. In this scheme, some efficient methods such as the in-place modification operation for path metrics, the saving of path transition and the circle access for path surving are presented. By using these methods, the RAM size needed for saving metrics and paths and the power consumption are decreased. It is shown that the Viterbi algorithm of K=9 whose performance specifications satify the IS-95 standard can be implemented with a single chip FPGA XC4010. The performance is tested, and the implementation consideration is discussed. Related Articles | Metrics | Comments（0）

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A Beeper Intermodulation Distortion Analysis Using Volterra Series LIAO XIAOPING, WEI TONGLI Journal of Applied Sciences    1998, 16 (2): 157-162.   Abstract （310）      PDF（pc） （216KB）（74）       Knowledge map    Save We study the third-order intermodulation distortion of a radio frequency receiver in a Beeper with Volterra series analysis. For a cascaded system, we have deve loped a Volterra model for individual circuit of the receiver. We also have studied the relation between the third-order intermodulation distortion of the overall radio frequency receiver and that of the individual circuit. The calculated results are desired for designing the radio frequency receiver, and can be used in other weakly nonlinear distorted receivers. Related Articles | Metrics | Comments（0）

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The Algorithm of the Wavelet Network for Nonlinear Function Approximation LIU HONG, MO YULONG Journal of Applied Sciences    1998, 16 (2): 163-169.   Abstract （361）      PDF（pc） （244KB）（109）       Knowledge map    Save In this paper, we use a new type of network, wavelet network, to approximate a nonlinear function. The wavelet network is studied with the combination of the traditional neural network theory with the most advanced math tool of analysis and it contains wavelons whose activation function is wavelet constructed with sigmoid function. This paper illuminates the approximation theory of the wavelet network and constructs a practical wavelet network. We also discuss the choice of the mother wavelet and the algorithm of decreasing the number of wavelons. The experimental results show that the wavelet network has achieved a high accuracy for approximating nonlinear function, and the scale of the network is small. Related Articles | Metrics | Comments（0）

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Application Research of Finite Element in Electrical Capacitance Tomography XIAO HUA, YAN JIE, BAO ZONGTI Journal of Applied Sciences    1998, 16 (2): 170-175.   Abstract （327）      PDF（pc） （234KB）（108）       Knowledge map    Save This paper discusses the application of the method of finite element in capacitance tomography, and describes an emulation software package for capacitance tomographic image reconstruction which is based on 12-electrode capacitance transducers. It is developed on SGI graphic workstation using visualized programming language PV WAVE. With the help of it, we can study in depth the variations of capacitance sensitivity distributions and fluid model parameters. Hence, it provides powerful methods for improving image reconstruction algorithm and the design of optimal capacitance transducer geometrical parameters. Finally, by using the emulation results, the properties of capacitance tomography are discussed. Related Articles | Metrics | Comments（0）

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The Influence of External Magnetic Field to the Energy-Flow Deflection of Magnetostatic Surface Wave on Anti-Ferromagnetic Films YU LIMING, WANG QI Journal of Applied Sciences    1998, 16 (2): 176-184.   Abstract （312）      PDF（pc） （308KB）（81）       Knowledge map    Save The dispersion relations of magnetostatic surface wave, which has higher and lower frequency branches, on an antiferromagnetic plane surface are studied in the case that the bias magnetic field is oriented arbitrary within the surface of the antiferromagnet. It is show that the direction of the energy flow of two branches of the wave are sensitive to the direction and amplitude of the bias magnetic field, and can be controlled to deflect up to 90 degrees. Related Articles | Metrics | Comments（0）

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A Study on the Boundaries of Diamond Growth Region Under Activated Low Pressure Conditions WAN YONGZHONG, ZHANG WEI, WANG JITAO, HUANG ZHONGQIANG Journal of Applied Sciences    1998, 16 (2): 185-190.   Abstract （396）      PDF（pc） （220KB）（92）       Knowledge map    Save Based on the non-equilibrium thermodynamic coupling model, the ternary C-H-O stationary non-equilibrium states phase diagrams are calculated under different temperature and pressure in this paper. The calculated results of the isothermal sections show that the whole diamond growth region will gradually rotate anti-clockwise around its core with the substrate temperature increasing while its shape changes greatly. Related Articles | Metrics | Comments（0）

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A Study on Adsorptive Theory of Real Gases YANG QINGXIAN, LU XUEDONG Journal of Applied Sciences    1998, 16 (2): 191-199.   Abstract （584）      PDF（pc） （301KB）（150）       Knowledge map    Save In this paper, the adsorption is studied in the light of statistical mechanics, with the result that a universal isotherm equation of the adsorption has been found, and the practical isotherm equation for real gases is given when the interaction between gas molecules is depicted in terms of Keesom and the Lennard-Jones potential. The experimental isotherms of the adsorption of medium and micro aperture charcoal are measured. It is seen that the agreement between theoretical and experimental isotherms of micro aperture charcoal is satisfred. Related Articles | Metrics | Comments（0）

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Research on Generating Mechanism of Engraving Graphics with Set and Random Fractal DENG ZHONGLIANG Journal of Applied Sciences    1998, 16 (2): 200-208.   Abstract （356）      PDF（pc） （323KB）（76）       Knowledge map    Save The generating methods of engraving graphics with set or random fractal are put forward in this paper.The engraving graphics can be controlled by the original fractal model,rules of fractal, translation and mapping.With mapping method,the engraving graphics on a plane can be translate into a trimensional graphics on an object with a complex surface.Because of the self-similarity,fine structure and iteration of the fractal,the stored information quantity for graphics can be reduced.Our methods can be used to generate the tool path for engraving and get a good artistic style. Related Articles | Metrics | Comments（0）

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Building of Fuzzy Model between Alloy Adding Amount and Material Characteristics JI CHUNRONG, LI YAN, BAI WANMIN, WANG DAMING Journal of Applied Sciences    1998, 16 (2): 209-214.   Abstract （314）      PDF（pc） （202KB）（70）       Knowledge map    Save Based upon RM Tong's thought of regarding fuzzy model as the set of fuzzy conditional proposition by converting the accurate value into a fuzzy one, the structure of a fuzzy system formed by alloy element adding amount and material characteristic norm is determined, and then the fuzzy model of the system is built. This new general method for studying the influence of alloy adding upon the material characteristics is presented in detail. Related Articles | Metrics | Comments（0）

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A Stabilizing Method of Three Classes of Nonlinear Systems with Limited Uncertain Disturbances SHI XIAOPING, WANG ZICAI, MA KEMAO Journal of Applied Sciences    1998, 16 (2): 215-221.   Abstract （333）      PDF（pc） （225KB）（52）       Knowledge map    Save Using the exact linearization theory for nonlinear systems, we transform three classes of affine nonlinear systems with limited uncertain disturbances into linear ones with uncertain parameters, and then solve the stabilization problem of the original systems with the aid of pole assignment method. Related Articles | Metrics | Comments（0）

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Study on the Attitude Algorithm of Strapdown System CHENG JIABIN, ZHANG YANHUA Journal of Applied Sciences    1998, 16 (2): 222-228.   Abstract （319）      PDF（pc） （241KB）（66）       Knowledge map    Save The quaternion attitude algorithms are studied in this paper. The scale error, skew error and drift error for algorithms of different kind are clearly described by using U-S fraction of attitude matrix. Coning error and algorithm optimization are also discussed in this paper. Related Articles | Metrics | Comments（0）

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PI Type Constrained Receding-Horizon Predictive Control CHEN ZENGQIANG, YUAN ZHUZHI Journal of Applied Sciences    1998, 16 (2): 229-233.   Abstract （339）      PDF（pc） （182KB）（82）       Knowledge map    Save Based on the constrain of the receding-horizon predictive output and the optimzation of the multiple-step predictive control cost function,the PI type constrained receding-horizon predictive controller is designed. The simulation results are demonstra ted, showing the excellent property of this method. Related Articles | Metrics | Comments（0）

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Fuzzy-Randomness in the Analysis of Structural Reliability JIANG CHENGYI, DENG CHAORONG Journal of Applied Sciences    1998, 16 (2): 234-242.   Abstract （315）      PDF（pc） （301KB）（106）       Knowledge map    Save The theory and method for structural reliability design with the influence of uncertain factors of both randomness and fuzzyness are discussed in this paper. Related Articles | Metrics | Comments（0）

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Synthesis, Structure and Properties of Slicon Containing Quinone-Amine Polymers GAO NAN, LU XUEFANG, LU CHENG Journal of Applied Sciences    1998, 16 (2): 243-248.   Abstract （336）      PDF（pc） （213KB）（81）       Knowledge map    Save Two new kinds of soluble silicon containing quinone amine polymers (PQA) were synthesized by T,k-diaminoalkoxy polymethylsiloxane and T,k-diaminoalkyl polymethylsiloxane reacted with p-benzoquinone. PQA can be cured by mixing chloro sulphonated polyethylene and epoxy resin, and the products are a kind of water-proof and rust-proof coating film with low moisture absorption and good saltwater resistance. Related Articles | Metrics | Comments（0）

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The Multi-Particle Interaction of Electrorheological Fluids GAO XIANGYANG, ZHAO XIAOPENG, ZHENG CHANGQING Journal of Applied Sciences    1998, 16 (2): 249-252.   Abstract （291）      PDF（pc） （163KB）（104）       Knowledge map    Save We presented a modified conductivity model for the attractive force of a perfect particle chain in a nonpolar liquid. With the concept of equivalent plate thickness, we calculated the periodic electric field in a chain and the periodic charger in the plate surfaces. We obtained the total attractive force of particles with a linear superposition method where the multi-particle effect in a perfect chain was concerned. We also compared the predicted quasistatic yield stress with the experiment data of two materials, Alooh/Silicone oil and Zeolite/Silicone oil, and found they are in a well agreement. Related Articles | Metrics | Comments（0）

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Theorem of Conservation of the Node Voltage Sensitivity Order and Its Application in Analog Circuit Fault Dictionary LI FENG, DENG TIEJUN Journal of Applied Sciences    1998, 16 (3): 253-261.   Abstract （423）      PDF（pc） （295KB）（100）       Knowledge map    Save Two theorems in linear circuits are presented and proved in this paper. One is the theorem of conservation of the node voltag sensitivity order, the other is the theorem of conservation of node voltage change order. Based on the theorems, a new approach——the hard and soft fault dictionary for analog circuits is presented. Only using one fault characteristic code, this method can determine hard or soft fault which is caused by any element parameter. The size of the dictionary only is half of the size of the former hard fault dectionary. Related Articles | Metrics | Comments（0）

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Unified Model and Analysis of a Class of Adaptive ⅡR Filters LU ZIYI, YANG LÜ XI, HE ZHENYA Journal of Applied Sciences    1998, 16 (3): 262-268.   Abstract （375）      PDF（pc） （257KB）（79）       Knowledge map    Save We present a new approach using vector space base functions to discuss the adaptive ⅡR filter with restricted feedback——Gamma filter and Laguerre filter, and propose a unified model for them. We analyze and compare this class of filters in detail, showing that Gamma filter has advantages over Laguerre filter. We also derive the Wiener-Hopf equation and the corresponding LMS algorithm of them. Some simulation results are also presented. Related Articles | Metrics | Comments（0）

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