1996 Vol.14

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WAVE REFLECTION FROM THE MULTIPLESLAB-GENERALIZED FRACTAL LAYERS CHEN LUJUN, LIANG CHANGHONG, SHI XIAOWEI Journal of Applied Sciences    1996, 14 (1): 1-6.   Abstract （288）      PDF（pc） （372KB）（73）       Knowledge map    Save The reflection and tranEmiedon spectra of oblique-incident waves at a wultiple-slab-generalized fractal layer which consists of a fraotal set are studied.A generalized method,with self-similarity, is used for this purpose.The genemlized formulae as well as a new type of reflection and transmission spectra,i.e., the self-similar spectra, are obtained.This type of spectra may be used in electronic countermeasure, film optics and photoelectronic devices,and so on. Related Articles | Metrics | Comments（0）

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INTERLAYER EXCHANGE INTECRALS NEAR THE SURFACE OF A FERROMAGNET WU XUEYUAN, GU SHIWEI, LI WEISHENG Journal of Applied Sciences    1996, 14 (1): 7-10.   Abstract （360）      PDF（pc） （258KB）（70）       Knowledge map    Save THe in Inwhayer exchange Paramters near the surface of a ferromagnetic film have been calcuated;and they have been extended to the case of the semi-infinite sample.The results exhibit that the exchange interaction near the surfare is greater than that of the bulk.This confirms theoretically the assumption made by Mills. Related Articles | Metrics | Comments（0）

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THE BOUNDS OF EFFICIENCY AND POWER OFAN IRREVERSIBLE CARNOT ENGINE YAN ZIJUN, TIAN XINQUAN Journal of Applied Sciences    1996, 14 (1): 11-15.   Abstract （433）      PDF（pc） （309KB）（96）       Knowledge map    Save In this paper, the highest and the lowest bounds of the efficiency and power if an irreversible steady-state-flow Carbon engine with external thermal resistance and internal heat leak were studied. Some significant discussions were done.From this,two new criteria for the selection of the working parameters of the engine were provided. Related Articles | Metrics | Comments（0）

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AN EFFICIENT INEXACT REASONING ALGORITHM LU ZHENGDING, HU HEPING, LI FAN Journal of Applied Sciences    1996, 14 (1): 16-25.   Abstract （332）      PDF（pc） （475KB）（78）       Knowledge map    Save The paper presents an inexact reasoning algorithm based on fuzzy production rule matrix transformations, and interprets the inference process of the algorithm with examples.Furthemore the paper proves that the complexity Of the algorithm is O(n+1) for the knowledge system with n fuzzy production rules. Related Articles | Metrics | Comments（0）

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THE DEGENERATION OF FUNCTIONS OVER RING Zk FENG DENGGUO, XIAO GUOZHEN Journal of Applied Sciences    1996, 14 (1): 26-29.   Abstract （303）      PDF（pc） （261KB）（62）       Knowledge map    Save The concept of the Ohrestenson spectrum over Ring Zk is presented. in this paper;and the degeneration and the characteristic of linear structures of the functions over ring Zk are discussed using the spectrum. Related Articles | Metrics | Comments（0）

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AN ENTROPY BASED 3D EDGE DETECTION METHOD XIE XIAOHUA, LUO LIMIN, WEI YU Journal of Applied Sciences    1996, 14 (1): 30-34.   Abstract （297）      PDF（pc） （447KB）（49）       Knowledge map    Save This paper proposes an exponential behavior based entropy operafor for 3D edge detection.The surface point can be located by the entropy of a local window and the orientation of the surface can be decided by the coordinates of the centroid of the window.A related fast algorithm is presented. The experimental results verify that the method is efficient for 3D medical images. Related Articles | Metrics | Comments（0）

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AN ALGORITHM FOR DECIDING QUADRATIC BOOLEAN FUNCTIONS BY COUNTING DING ZUOLIU Journal of Applied Sciences    1996, 14 (1): 35-40.   Abstract （427）      PDF（pc） （355KB）（63）       Knowledge map    Save An algorithm is proposed to decide whether a function of n variables is a quadratic Boolean function.If so, how can we obtain the quadratic terms? Different from the Quine-McOluskey method, our algorithm is based on the counting of values 0, and allows a high 1evel of parallelism. Related Articles | Metrics | Comments（0）

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THE OVERALL STABILITY OF SOME NONLINEARNON-FORCED NETWORKS AND ITS APPLICATION LIU XIAOHE Journal of Applied Sciences    1996, 14 (1): 41-47.   Abstract （324）      PDF（pc） （458KB）（59）       Knowledge map    Save In this paper,the overall stability of some nonlinear non-forced networks with the disposed parallel characteristic is studied. The anther puts foward some applied criterions for the overall asymptotic stability and overall exponential stability,and the example of continous Hopfield neural networks is discussed for the application.The result of the paper is applicable to the nonlinear non-forced network with nonreciprocal resistor and local active resistor. Related Articles | Metrics | Comments（0）

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APPLICATION OF MUTUAL INFORMATION TO ANALYSING TIME SERIES ZHAO HONG, CHAI LU, WANG HAO, LIU SHUSHENG Journal of Applied Sciences    1996, 14 (1): 48-52.   Abstract （825）      PDF（pc） （349KB）（206）       Knowledge map    Save According to the information Theory, we introduce a method with which we can quantitatively calculate the mutual information of two systems S and Q,i.e.I(S; Q)=∑P(si,qj).log[P(si,qj)/P(si)P(qj)].The predictability of the data of a system was analyzed and the optimal prediction precision was obtained by the computing results of the mutual information between the one dimensional time series and its time delayed series from the time period systems,chaotic systems and random systems. The dissimilarity of the data of a system was estimated by the computing regular of the mutual information between the two dimensional time series from time period systems, chaotic systems and randoms systems,thus the waive of releasing the work could be avoided. Compared with the cross correlation function,the mutual information can quantitatively show the relation between the two time series. Related Articles | Metrics | Comments（0）

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REALIZATION OF OUTPUT DECOUPLING OF A PULSEREBALANCE LOOP FOR A STRAPDOWN TUNED GYRO LI HONGSHENG Journal of Applied Sciences    1996, 14 (1): 53-59.   Abstract （346）      PDF（pc） （395KB）（53）       Knowledge map    Save In strapdown systems, rebalance loops connected with tuned gyros are generally designed based on control decoupling, while output decoupling is realized by proceeding their output current data. This paper discusses the realization means of output decoupling in detail,establishes the computation equations,designs the hardware construction and software flow chart.Simulation shows that the effects of decoupling are satisfying. The described plan therefore is feasible. Related Articles | Metrics | Comments（0）

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CCⅡ-BASED-βRC CURRENT-MODE BIQUADRATIC FILTER DESIGN XIAO GAOBIAO, WU JIE Journal of Applied Sciences    1996, 14 (1): 60-66.   Abstract （338）      PDF（pc） （394KB）（49）       Knowledge map    Save A class of current-mode biquads using the -β current amplifier and RO components are presented in this paper.They are derived directly from the Salled-Key -kRO voltage-mode biquads by dual transformation.COⅡ devices are used as convenient current amplifiers here. These biquads can be cascaded directly. Related Articles | Metrics | Comments（0）

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CALCULATION OF EFFECTIVE EM PARAMETERS OFRANDOM MIXTURE CONTAINING ELLIPSOIDALPARTICLES WITH DIELECTIC COATING LAYERS LIU SHUZHANG, QIU CAIMING Journal of Applied Sciences    1996, 14 (1): 67-72.   Abstract （308）      PDF（pc） （371KB）（69）       Knowledge map    Save A new procedure is used to derive the extended electromagnetic mixing formulas.The corresponding formulas for the ellipsoidal particles having multilayered enclosure is obtained, and the effects of particles on the effective EM parameters are analyzed. Related Articles | Metrics | Comments（0）

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TRAPPING CHARACTERISTICS OF THE SHALLOW IMPURITY ENERGY LEVEL IN SILICON AT LOW TEMPERATURES ZHENG JIANG, XIAO ZHIXIONG, WU JIN, WEI TONGLI Journal of Applied Sciences    1996, 14 (1): 73-77.   Abstract （463）      PDF（pc） （296KB）（95）       Knowledge map    Save In this paper,the.trapping effect of the shallow impurity energy level in silicon at low temperatures is analyzed. The expression for the ratios of the injected electrons in the conduction band to the total electrons nC/nT at various injection levels in p-type silicon is given. The main. results indicate that the trapping effect of the shallow impurity energy level under the low injection condition will exert a tremendous influence on the frequency properties of bipolar devices at low temperatures, and it becomes neligible at the high injection level because the total injected electrons overwhelm the carrier trapping effect. Related Articles | Metrics | Comments（0）

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THE INyESTIGATION OF INTERFACIAL STABILITY DURING Te SOLUTION GROWTH OF SMSC Cd1-xMnxTe MO YAOWU, WU WENHAI Journal of Applied Sciences    1996, 14 (1): 78-85.   Abstract （362）      PDF（pc） （745KB）（58）       Knowledge map    Save Cd1-xMnxTe crystal films were grown in the OdTe seed crystal from Te solution,using the revolving liquid phase epitaxial(LPE) configuration designed by us. The crystal film, typically~0.4mm thick and 0.5cm2 in area, stood at an angel wish the seed crystal plane.The stability of the interface between the solution and solid phases during the growth process was studied using the linear stability analysis proposed by Mullins and Sekerka.The influences of heterogeneity in interfacial energy and causes of forming the ripple morphology on the crystal film surface were analyzed. Oonditions for the stable liquid phase epitaxy were probed. Related Articles | Metrics | Comments（0）

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DEVELOPMENT OF A POLYIMIDE FILM CAPACITIVE GATE FET HUMIDITY SENSOR LUO RUFANG, LU DEREN, LU YUPING Journal of Applied Sciences    1996, 14 (1): 86-90.   Abstract （410）      PDF（pc） （324KB）（72）       Knowledge map    Save A micro HUMFET with a polyimide(PI) film humisensing capaoitor lying on the insulating gate was developed. It is an n-channel enhancement mode device with a meandering gage of 10μm in channel length and >8000μm in channel width and with a double insulating gate(SiO2+Si3N4) of about 30nm.The hnmi-sensing capacitor lying on the insulating gate is an Au-PI-Al capacitor. The structure design and operation principle of the PI-HUMFET were described.The measuring result of the characteristics of the device was reported and some relative problems were discussed. Related Articles | Metrics | Comments（0）

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STUDY ON THE PHOTOCROSSLINKED POLY (VINYL ALCOHOL)HYDROGELS AND PENICILLIN SENSITIVE BIOSENSOR JIA DEMIN, PANG YONGXIN, GUO BOPING, LI HUI Journal of Applied Sciences    1996, 14 (1): 91-96.   Abstract （386）      PDF（pc） （397KB）（62）       Knowledge map    Save A novel photocrosslinked poly(vinyl alcohol) hydrogel was prepared and applied to entrap β-lactam penicitllinase.The properties of the hydrogel and immobilized enzyme were thoroughly investigated. Results show that the hydrogel is very suitable for the immobllization of β-lactam penieillinase.The stabilities of the immobilized enzyme to PH value of the medium, temperature and storage are better than those of the free β-laotam penioilllnaee. Also the immobilized enzyme membrane is connected to a pH-sensitive field effect transistor to form a penieillin-sensitive biosensor. The specifications of the resulting biosensor are as follows:response time less than 60sec, sensitivity to penicillin larger than 3mV/mM,1inear response range of 0~16mM, and very good storage stability.When it is applied to determine the penicillin content of the fermenting mixture during the production process, the results are found to conform to those obtained by the conventional iodine titration. Related Articles | Metrics | Comments（0）

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MARTENSITIC TRANSFORMATION IN Fe-29WT% NiALLOY ULTRAFINE PARTICLES CHEN YUNHONG, JIANG YUMEI, DENG GUICHANG, LU HUAIXIAN, LI GANG Journal of Applied Sciences    1996, 14 (1): 97-102.   Abstract （380）      PDF（pc） （535KB）（50）       Knowledge map    Save The ultrafine particle samples of Fe-29 wt% Ni alloy with different average diameters(12 to 100nm) are prepared by the evaporation condensation method in the atmosphere of N2.They are a mixture of martensitio α'(bcc) and the austenite γ(fcc).Each individual particle is a single crystal (bcc or fcc). The volume fraction of martensite increases evidently with the decrease of the average diameter. During heating, as the average diameter decreases, the temperature (Aa and Af) for α'-γ reverie martensitic transformation comes down, and the range(As-Af) of the transformation temperature becomes narrower. However, during cooling (up to 77K), we have not found the martensitic transformation. The stabilization of the austenite and the growth mechanism of the martensite and austenite are preliminarily discussed in this Paper too. Related Articles | Metrics | Comments（0）

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THE RESEARCH ON THE CUTTING EQUATION FORTHREE-DIMENSIONAL CUTTING ZHANG WEIJI Journal of Applied Sciences    1996, 14 (1): 103-107.   Abstract （368）      PDF（pc） （330KB）（75）       Knowledge map    Save The cutting equation for three-dimensional cutting is presented in this paper.The deduction of this equation agrees with our test results very well. Related Articles | Metrics | Comments（0）

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A NEW TYPE PHOSPHOR SrAl2O4:Eu WITH LONG AFTERGROW LUMINESCENCE CHEN JIYAO, SONG QINGMEI Journal of Applied Sciences    1996, 14 (1): 108-112.   Abstract （349）      PDF（pc） （334KB）（97）       Knowledge map    Save A new type phosphor SrAl2O4:Eu with long persistent aftergrow in the system of SrO-Al2O3 was reported in this paper.The phosphor was found in the SrAl2O4 monoclinic crystal structure as measured by X-ray powder diffraction.The luminescence of phosphor was the typical d-f transition of Eu2+, according to the excitation spectrum and emission spectrum. After excitation by the UV fluorescent lamp, the aftergrow luminescence of phosphor could last 10 h with a hyperbola type decay, showing the characteristic of recombination luminescence.The measurements of thermoluminescence spectra showed that there were two thermoluminescence peaks lying at 333°K and 378°K, reflecting that the electron traps existed in the Phosphor. furthermore,experiments exhibited that the impurity component Mg formed the electron traps and made the phosphor possess the long aftergrow luminescence property. Related Articles | Metrics | Comments（0）

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RELIABILITY LIFE CALCULATION AND EXPERIMENTALRESEARCH ON WEAR OF THE THRUST BEARING ZHANG ZUMING Journal of Applied Sciences    1996, 14 (1): 113-118.   Abstract （381）      PDF（pc） （386KB）（83）       Knowledge map    Save Based on the wear law and reliability theory of the thrust bearing,the mathematical model of reliability life calculation on the wear of the thrust bearing is derived. An on-line measuring device of the speeding up wear for the thrust bearing is developed. The wear rate of the parts is measured.We find the measured value conforms to the theoretical calculation, thus proving the correctness of the model. Furthermore,it is believed that the model can provide scientific theory,method and experimental data for the reliability life calculation on the wear of the thrust sliding bearing. Related Articles | Metrics | Comments（0）

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THE FORMING THEORIES OF ROTARY TOOLS ON FIVE-AXIS NUMERICALLY CONTROLLED GRINDER LIU HURAN Journal of Applied Sciences    1996, 14 (1): 119-126.   Abstract （334）      PDF（pc） （530KB）（61）       Knowledge map    Save This thesis researched the foraging theories of rotary cutting tools on the fiveaxis numerically controlled grinder,and deduced the nonlineal equation systems of the relative movement satisfied by the banding wheel and the work.The groove was formed in one awoke,while the normal rake angle remained constant. Related Articles | Metrics | Comments（0）

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MOMENT EXCITATION ON STUDIES OF STRUCTURE-BORNE SOUND QIU SHUYE, JIANG JIANZHONG, B M GIBBS Journal of Applied Sciences    1996, 14 (2): 127-135.   Abstract （311）      PDF（pc） （585KB）（59）       Knowledge map    Save A prototype moment actuator is introduced. It consists of two parallel rods of giant magnetostrictive material. Some design considerations both on acoustics and magnetics are presented. Magnetic biases for three prototypes with parallel and series magnetic paths, respectively, are examined in order to optimize the design of the moment actuator. Related Articles | Metrics | Comments（0）

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THE NUMERICAL COMPUTATION OF CYLINDRICAL FUNCTIONS FOR FRACTIONAL ORDERS AND COMPLEX ARGUMENTS WANG XILIANG, FENG YONGCHENG, SHEN LIYIN, QING XIANMING Journal of Applied Sciences    1996, 14 (2): 136-140.   Abstract （320）      PDF（pc） （340KB）（82）       Knowledge map    Save A rigorous algorithm for the computation of fractional order cylindrical functions with complex arguments is discussed in the paper. The values of fractional order cylindrical functions are computed by using different formulae according to the argument magnitude,|z|. The algorithm not only is possessed of high accuracy of computation but also is unlimited in complex argument z.programming of the algorithm has been completed. Related Articles | Metrics | Comments（0）

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NONLINEAR TIME-DOMAIN OPTIMIZATION OF TWO-DIMENSIONAL LOSSLESS DIELECTRIC INHOMOGENEITY PROFILE RECONSTRUCTION Yu WENHUA, PENG ZHONGQIU, REN LANG Journal of Applied Sciences    1996, 14 (2): 141-148.   Abstract （348）      PDF（pc） （481KB）（81）       Knowledge map    Save The Born iterative method is used to solve the nonlinear inverse scattering problem for two-dimensional dielectric inhomogeneity using time-domain data; three order difference regularization is applied to improve the inversion process; and a general selecting regularization parameter is developed. Related Articles | Metrics | Comments（0）

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THE AREA EFFECT OF FRACTAL FIGURE AND THE RESEARCH ON THE FRACTAL DIMENSION OF FRACTURES HE ZONGYAN Journal of Applied Sciences    1996, 14 (2): 149-157.   Abstract （316）      PDF（pc） （573KB）（66）       Knowledge map    Save The authors advanced a new conception the area effect of fractal figures and deduced formulae for the fractal dimensions of three kinds of figures. Because of this effect, some false dimensions may be obtained in the slit island method for measuring material's toughness. So a new method without area effect is proposed. Related Articles | Metrics | Comments（0）

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SOLID PARTICLE EROSION OF CaLa2S4 GAO HuA, SUN QlQING, J E FIELD Journal of Applied Sciences    1996, 14 (2): 158-166.   Abstract （385）      PDF（pc） （1045KB）（71）       Knowledge map    Save Solid particle erosion of the CaLa2S4 infra-red transmitting material has been studied; it includes crack initiation and propagation, flake formation and oscillation as well as the effect of solid velocity (from 22 to 180m·s-1) on crater morphology and erosion rate. Theoretical analysis has been carried out upon (1) plasticity in the contact zone, and (2) the striation mark on the lateral crack surface. And by using a membrane free vibration model, the widths of striation mark have been estimated. Related Articles | Metrics | Comments（0）

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AN ADAPTIVE DEMODULATION METHOD FOR FSK SIGNALS Hu AlQUN, SU JIE Journal of Applied Sciences    1996, 14 (2): 167-172.   Abstract （353）      PDF（pc） （369KB）（134）       Knowledge map    Save This paper presents a new method for demodulating the frequency shift Keying (FSK) signals, the adaptive demodulation (ADEM) method. The commonly used least mean square (LMS) error adaptive filtering algorithm is employed for studying the demodulating procedure and the performance of the ADEM scheme. It is indicated by simulation experiments that the ADEM has many advantages over conventional ones, such as the powerful anti-noise ability,the small transfer delay, and the convenient implementation with DSP technology. The idea and Principle of the ADEM can also be applied to other modulation modes. Related Articles | Metrics | Comments（0）

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CONFIDENCE INTERVAL ESTIMATION FOR THE LCCATION PARAMETER OF NORMAL DISTRIBUTION FROM INCOMPLETE DATA ZHU HONG, LU SHU Journal of Applied Sciences    1996, 14 (2): 173-178.   Abstract （433）      PDF（pc） （387KB）（95）       Knowledge map    Save A method of confidence interval estimation for the location parameter of normal distribution from incomplete data is given. The result applies to the observed data where there may be outliers. Related Articles | Metrics | Comments（0）

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APPLICATION OF FUZZY THEORY TO THE STUDY OF COMPOSITE factors influencing properties of ARALL analysed by multi-criteria of fuzzy theory ZHONG WEIHONG, OHEN OHANGQI, ZHENG RUIQI, LI HONGYUN, HU HONGJUN, QIANG WEI, WANG YUYING Journal of Applied Sciences    1996, 14 (2): 179-185.   Abstract （323）      PDF（pc） （413KB）（61）       Knowledge map    Save The fuzzy theory is applied to deal with composites in this paper. The multi-factor relation figure and fuzzy matrix influencing the properties of the super-hybrid composite ARALL are presented. By using the matrix operation of the fuzzy theory, the multi-criteria matrix is obtained. Through the two-grade-decision method, the degree of influences on the properties of ARALL by the factors, such as the residual stress, adhesive property and content of the adhesive,is analysed. The result shows that the state of the residual stress is the chief factor, followed by the adhesive property and the content. This paper offers a new method to the raw materials choice for the composite and its design, and both the result and the method of the paper are of significance to the study of composites. Related Articles | Metrics | Comments（0）

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THE MAXIMUM LATENESS OF THE JOBS WITH DIFFERENT RELEASING TIMES AND PROCESSED IN BATCHES SUN SHIJIE Journal of Applied Sciences    1996, 14 (2): 186-190.   Abstract （352）      PDF（pc） （360KB）（73）       Knowledge map    Save Posner studied the total weighted completion times of the jobs with different releasing times and processed in batches, and obtained good results.This Paper considered the maximum lateness of the jobs with different releasing times and processed in batches too. We not only obtained the results similar to those of Posner for our problem under the same condition, but we also considered more models than Posner. For all these models, we gave the optimal schedule, or changed it into a problem which had been well studied. Related Articles | Metrics | Comments（0）

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THE ACCELERA TED WEAR TEST AND RELIABILITY RESEARCH OF THRUST SLIDING BEARING ZHANG ZUMING Journal of Applied Sciences    1996, 14 (2): 191-198.   Abstract （318）      PDF（pc） （450KB）（82）       Knowledge map    Save This paper focused on the difficult points existing in the reliability analysis of the machine elements wear. An on-line measuring rig used in the accelerated wear test of the thrush sliding bearing was developed. The main experimental research accomplishments on the wear process of the thrust sliding bearing were reported in the paper. Based on precise measurement, a new theory and method for the reliability calculation of machine elements wear were proposed. Related Articles | Metrics | Comments（0）

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A STUDY ON TEMPERATURE DISTRIBUTION IN WORKPIECE SURFACE LAYER DURING CREEP FEED GRINDING BY COMPUTER SIMULATION TECHNIQUE XU HONGJUN, XU XIPENG, XU HONGCHANG, ZHANG YOUZHEN Journal of Applied Sciences    1996, 14 (2): 199-207.   Abstract （298）      PDF（pc） （623KB）（57）       Knowledge map    Save Creep feed grinding has a vast reservoir of potentialities itself.However since mechanism researches fall behind the production application, its potentialities have not been fully developed. For instance in the grinding circle at home and abroad, the creep feed grinding burn restricting both machining quality and efficiency has been universally considered as one of the most elusive and troublesome problems up to now. In this paper, on the basis of deepgoing researches on grinding heat, the heat transfer process of the contact zone and the unstable-state temperature field in the workpiece surface layer during creep feed grinding,a simulation mathematical model which can be used to calculate the time-course of temperature field distortion in the workpiece surface layer has been structured,and on these grounds, the computer simulation studies of the workpiece burn process during creep feed grinding have been completed. The simulation results accord well with the practice of the burn process during creep feed grinding. The results in this paper take the lead in explaining the heat mechanism of burn course during creep feed grinding, showing that the creep feed grinding burn is a typical slow changing course and has obvious premonition characteristics. Therefore it can be predicted and monitored. This creative work can be regarded as an important contribution to the basic theory of grinding. Related Articles | Metrics | Comments（0）

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MICROCOMPUTER DETECTION AND FUZZY CONTROL OF POLISHING TECHNOLOGICAL PARAMETERS LIU MINGYUAN, JI CHUNRONG, FANG JIANHONG, YANG LINSEN Journal of Applied Sciences    1996, 14 (2): 208-214.   Abstract （341）      PDF（pc） （409KB）（58）       Knowledge map    Save The research work of realizing computer control on lens polishing lathe JP12.6 is introduced. It includes the realization of the system hardware and the method of fuzzy control in the Polishing process. The experiment shows that computer fuzzy control, compared with the original manual control, not only has high productivity, but also has stable Polishing quality. Related Articles | Metrics | Comments（0）

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A METHOD TRANSFORMING THE SEMI-INFINITE DOMAIN OF ARBITRARY SHAPE CURVE BOUNDARY INTO THE ONE OF STRAIGHT BOUNDARY LINE XU LIZHONG Journal of Applied Sciences    1996, 14 (2): 215-218.   Abstract （388）      PDF（pc） （226KB）（82）       Knowledge map    Save In this paper, an analytical method conformally transforming the semi-infinite domain of an arbitrary shape curve boundary into the one of a straight boundary line is given. By means of the calculative examples, it is proved that by making use of this method, the mapping accuracy is high and the calculation is simple. Thus the paper lays a foundation for the calculation of the stress and deflection of the tooth-shape machine elements which are commonly used in engineering. Related Articles | Metrics | Comments（0）

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THE CURIE TEMPERATURE OF FERROMAGNETIC FILMS WU XUEYUAN, GU SHIWEI, LI WEISHENG Journal of Applied Sciences    1996, 14 (2): 219-222.   Abstract （341）      PDF（pc） （245KB）（64）       Knowledge map    Save The thickness dependence of the Curie temperature for the ultra-thin ferromagnetic films ranging in thickness from 4 to 7 monolayers has been calculated by considering the effects of the bound condition on the state and configuration of the electron and consequently on the exchange couplings between spins. The results show that the Curie temperature decreases with the reduction of the film's thickness. This confirms the general theoretical expectation from the microscopic point of view and explains the recent experimental results. Related Articles | Metrics | Comments（0）

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THE SURFACE INTEGRAL TO SOLVE AXISYMMETRIC DRAWING THROUGH HYPERBOLIC DIE ZHAO DEWEN, WANG GUODONG, ZHONG JUN, DONG XIJAN Journal of Applied Sciences    1996, 14 (2): 223-228.   Abstract （416）      PDF（pc） （329KB）（83）       Knowledge map    Save A kinematically admissible velocity field for axisymmetric bar drawing through a hyperbolic die is established, and with the surface integral determining the friction power,and the upper limit function integral determining the internal deformation power, an upper bound analytical solution to the field is obtained. Related Articles | Metrics | Comments（0）

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FSS SUBREFLECTOR ANTENNA WITH SMALL RCS FENG LIN, DENG SHUHUI, RUAN YINGZHENG, HU YULAN Journal of Applied Sciences    1996, 14 (2): 229-232.   Abstract （451）      PDF（pc） （280KB）（66）       Knowledge map    Save A Cassegrain antenna with frequency selective subreflector is introduced, and the measured radiation Patterns and rsdar cross section (RCS) of the antenna are given. In comparison with ordinary metallic subreflector, this antenna can obtain similar radiation pattern and about 20dB of ROS redaction.This technique can be applied to ordinary dual reflector antonnas by simply changing the subreflector into FSS. Related Articles | Metrics | Comments（0）

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MM-BAND DUAL-POLARIZED NETWORK YAO TEMIAO, QI LINGFEI, MAO JUNJIE Journal of Applied Sciences    1996, 14 (2): 233-238.   Abstract （581）      PDF（pc） （301KB）（61）       Knowledge map    Save Two mm-band dual-polarizers of excellent properties are discussed in this paper; various circuits are composed of them; some excellent properties (VSWR, polarized isolation, ellipticity, etc) are obtained from testing results. Related Articles | Metrics | Comments（0）

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CASE FORM CHECKED WITH UCT DUAN FANGYONG, QU WANLI, HUANG ZAILU Journal of Applied Sciences    1996, 14 (2): 239-242.   Abstract （292）      PDF（pc） （249KB）（60）       Knowledge map    Save The method of checking the case form by processing the log data go-ten with the ultrasmall cement-bond quality testing tool (UCT) is presented in this paper. The method is proved to be effective by theoretical analysis and the process effect of the real log data. Related Articles | Metrics | Comments（0）

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THE STATIC INDUCTION DEVICES WITH COMPLEX STRUCTURE S Y LI, S LIU R, X LIU, J H YANG Journal of Applied Sciences    1996, 14 (2): 243-247.   Abstract （338）      PDF（pc） （769KB）（74）       Knowledge map    Save A complex structure (C-S) which can be used in fabricating the Static Induction Devices (SID)is proposed and designed. This structural devices exhibit typical I-V characteristics and electrical performance, which are the same as those for the surface-gate and buried-gate types of SID. The experiment results indicate that C-S may be adopted as one of basic structures of SID. A prominent merit of C-S is that only ordinary planar technology is used to fabricate the SID. Related Articles | Metrics | Comments（0）

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