1993 Vol.11

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THE INVESTIGATION OF ANTIREFLECTIVE COATING OF DIAMOND LIKE FILMS ON SILICON SOLAR CELLS AN QILIN, XIA YIBEN, JU JIANHUA, SHI WEIMIN, WANG HONG Journal of Applied Sciences    1993, 11 (1): 1-4.   Abstract （278）      PDF（pc） （261KB）（65）       Knowledge map    Save The spectrum response of silicon solar cells can be obviously improved by using diamond-like films as antireflective coating. The experimental results show that the increase of the short-circuit current (Isc) is about 38%. The spectrum response value is increased in a relatively broad spectrum range and the antireflective efficiency reaches the maximum within the range from 650 nm to 750 nm. It is also found that in the range of wavelength, from 660 nm to 950 nm, the quantum efficiency approximately approaches to 1. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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OPTICAL ABSORPTION OF ELECTRON-BEAM EVAPORATED a-Si1-xCox FILMS GAN RUNJING, ZHANG FANGQING, ZHANG JINYAN, CHEN GUANGHUA Journal of Applied Sciences    1993, 11 (1): 5-10.   Abstract （282）      PDF（pc） （439KB）（61）       Knowledge map    Save The optical absorption properties of electron-beam-evaporated α-Si1-xCox films have been atudied. The result shows that the changes of the component x in the films affect the optical absorption in the long wave approaching that of the infrared more sensitively than in the short wave; the sensitive region of the optical absorption is in the 0.10 at% < x < 2.00 at% region. In the investigated components, when the component a; increases, the optical band gap of the film narrows from 1.50 eV to 1.28 eV. The experimental result is analysed and discussed with Cody's disorder theory of a-Si film. Related Articles | Metrics | Comments（0）

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THE INVERSION LAYER RESISTANCE IN INDUCED INVERSION LAYER SOLAR CELLS UNDER OPERATING CONDITIONS ZHANG XIUMIAO Journal of Applied Sciences    1993, 11 (1): 11-15.   Abstract （421）      PDF（pc） （347KB）（72）       Knowledge map    Save In this paper a series of equations, which determines the inversion layer resistance in an induced inversion layer solar cell is given. Our study ia different from the previous work in theory as the dependence of the inversion-layer resistance on the operating conditions is considered, and the effects of the interface charges at the oxide-silicon interface and the image charges at the outer surface are taken into account in the analysis. Taking the SiN insulator layer solar cell as a practical example, we investigate the relationship between the Inversion layer resistance and the operating voltage in the induced inversion layer solar cells of the SiN-SiO2-Si structure. The result indicates that the inversion layer resistance has a minimum value while the operating voltage is near 0.4V, and that when the operating voltage is higher than 0.4V, a drastic increase of the inversion layer resistance will appear. Related Articles | Metrics | Comments（0）

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ILLUMINATION AND HEAT ANNEALING OF a-Sl:H SOLAR CELLS ZHENG JIAGUI, PENG LIANGHUAN, ZHOU XINMING, QIU SHANGYUAN, CAI WEI, LUO ZHAOHE, CAI YAPING Journal of Applied Sciences    1993, 11 (1): 16-22.   Abstract （353）      PDF（pc） （514KB）（70）       Knowledge map    Save The performance and stability of a-SiH solar cells were studied under various illumination conditions and with the heat annealing method. We found that the degradation of cell performance was due mainly to the reduction of fill-factor decrease, and that the stability of the cell was improved by heat annealing at 80-120℃. The experimental results were discussed. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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ISOTHERMAL DECAY CURRENT (IDC) METHOD AND ITS APPLICATION TO TRAPS IN ORGANIC SOLIDS ZHOU SHUQIN, JIN XIANGFENG Journal of Applied Sciences    1993, 11 (1): 23-30.   Abstract （476）      PDF（pc） （560KB）（110）       Knowledge map    Save The theory and experimental technique for the Isothermal Decay Current (IDC) method were discussed in this paper. The applications of the IDC method to α-CuPc, α-CuPc/PVK, Trans-PPA, DD-PPA thin films were described. The mean energy level Em and distribution parameters σ of Gaussian distributed traps fitted by multiple regression, the total occupied density of states N0f0 and the frequency factor v for the carrier detrapped were evaluated. Related Articles | Metrics | Comments（0）

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REACTIVE ION ETCHING OF POLYIMIDE FILM USING SF6 +O2 SUN CHENGLONG, DU GENDI, GUO FANGMIN, CHEN SIQIN, LIN SUIJUAN, HU SUYING Journal of Applied Sciences    1993, 11 (1): 31-36.   Abstract （520）      PDF（pc） （1213KB）（110）       Knowledge map    Save We report the principle of reactive ion etching of the polyimide film in piire O2 or SF6 + O2 mixed gases plnsmas. Anisotropic etching techniques are used to etch the polyiroide film whose thickness is 0-4μm. Excellent patterns with straight sidewalls are obtained. The equipment used in the etching process is the Plasraalab Up Etcher made by Oxford Plasma Technology Ltd (UK). Related Articles | Metrics | Comments（0）

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THE MODIFICATION OF SINGLE CRYSTAL n-ZnxCd1-xTe PHOTOELECTRODE BY USING FeCl3,Pb(NO32 DIPPING FAN QINBAI, CAI WENBIN, DENG XUNNAN Journal of Applied Sciences    1993, 11 (1): 37-43.   Abstract （422）      PDF（pc） （463KB）（88）       Knowledge map    Save The photoelectric effect of the n-ZnxCd1-x/Te (x=0.01-0.04) single crystal electrode is generally rather low. However, the photocurrent is improved apparently with FeCl3 dipping. Using Pb(NO3)2 as a dipping solution, both the fill factor and open-circuit voltage rise significantly. The conversion efficiency is enhanced to 10.2%. The cyclic voltammetric curves for the electrodes treated under different conditions have been measured. It is found that the electrode dipped in FeCl3 has the largest cathodic leakage current, and that there is a reduction peak at-0.9V(vs. S. C. E.). The one dipped in Pb(NO3)2 has the beat stability. The modification mechanism of this electrode has been discussed in detail. Related Articles | Metrics | Comments（0）

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COMPUTER SIMULATION OF SPUTTERING OF THE FIRST WALL MATERIALS IN FUSION REACTOR SHAO QIYUN, HUO YUKUN, CHEN JIANXIN, GAO XINGHUA Journal of Applied Sciences    1993, 11 (1): 44-50.   Abstract （359）      PDF（pc） （445KB）（90）       Knowledge map    Save In this paper, the sputtering caused by fusion of α-particles in the first wall of C, W, Be, SiO and stainless steel (Fe0.73Cr0.18Ni0.09) is investigated by using the Monte Carlo simulation, which is based on the binary collision approximation. The dependence of sputtering yields of the above-mentioned materials on the incident energy as well as the comparisons of results calculated with The Monte Carlo method with results from experiments are discussed. Under the condition of multi-energy a-particles bombardment, the sputtering yields, energy distribution, angular distribution and depth distribution of the origin of the sputtered particles, as well as the effect of incidence angle on sputtering yields are presented. The results show that under the same incident condition, the sputtering yield of stainless steel is higher than the yields of other materials, and that the yields of the rest are almost equal. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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STUDY ON INCLUSION COMPLEX OF CAFFEINE AND β-CYCLODEXTRIN HUANG WEIJUN, ZHOU YANZHU, JIANG MAN, LI LIPU, JIN SHUNZHI, TAN FU Journal of Applied Sciences    1993, 11 (1): 51-57.   Abstract （505）      PDF（pc） （2881KB）（90）       Knowledge map    Save The inclusion complex of caffeine and β-cyclodextrin was prepared, and its properties were studied by using the thermogravimetry-differential thermal analysis, nuclear magnetic resonance and infrared spectroscopy. The experi mental results showed that the caffeine molecule was included in the hydrophobic cavity of β-cyclodextrin molecule and its thermal stability was increased. Related Articles | Metrics | Comments（0）

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ON THE ADSORPTION OF REAL GAS BY STATISTICAL MECHANICS YANG QINGXIAN Journal of Applied Sciences    1993, 11 (1): 58-64.   Abstract （359）      PDF（pc） （417KB）（75）       Knowledge map    Save In this paper, we depict the interaction between gas molecules by the Keesom, potential, and study adsorption by the application of statistical mechanics, from which we deduce the adsorption isotherm equation. We find that the theoreti cal isotherm agrees with the experimental one, and that the equation of BET is its limit form, when the interaction between gas molecules is negligible. Related Articles | Metrics | Comments（0） Cited: Baidu(4)

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THE ANALYSIS OF TELECOMMUNICATION SYSTEM OF PERIODICALLY FLUCTUATING TRAFFIC FLOW HUANG JUN, CHENG SHIXIN Journal of Applied Sciences    1993, 11 (1): 65-70.   Abstract （279）      PDF（pc） （373KB）（66）       Knowledge map    Save As communication services are being fontinously extended, it is urgently necessary to carvy on the analysis of non-stationary flow. This paper extends the traditional method used to deal with the stationary traffic flow, to a new method which can be used to tackle the periodically fluctuating one. Related Articles | Metrics | Comments（0）

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PIEZOELECTRICITY IN POLY (VINYL CHLORIDE) AND THE ESR ANALYSIS OUYANG MENG, GONG KECHENG, YANG WEI, WU ZHENYAO, JIANG WANLAN Journal of Applied Sciences    1993, 11 (1): 71-74.   Abstract （429）      PDF（pc） （280KB）（70）       Knowledge map    Save The relationship between the piezoelectricity in poly (vinyl chloride) and the polarizing field, and the depolarization behaviour of poly (vinyl chloride) are discussed. The piezoelectric mechanism of the polarized poly (vinyl chloride) is studied by using ESR. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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IDENTIFICATION AND OPTIMAL DESIGN PROBLEMS IN ELECTROSTATIC FIELDS AND THEIR EXPERIMENT HUANG GUANGYUAN, SUN MAOTONG, DONG FAN, XUE YIBING Journal of Applied Sciences    1993, 11 (1): 75-82.   Abstract （359）      PDF（pc） （1216KB）（79）       Knowledge map    Save The problems considered are how to estimate the charge distribution in an eletrostatic field by some known potential data at certain points and how to design the optimal charge distribution in an electrostatic field such that its potential distribution fits a given state as well as possible. These problems are motivated by physical prospecting and biomedicine. Some algorithms for solving these problems are derived by making use of optimization techniques, and some physical experiments are given for judging the digital simulation results derived from these algorithms. The micro-computer is employed In these experiments. Related Articles | Metrics | Comments（0）

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A THEOREM ON HOPFIELD NEURAL NETWORK LUO FALONG, YANG JUN Journal of Applied Sciences    1993, 11 (1): 83-85.   Abstract （529）      PDF（pc） （159KB）（71）       Knowledge map    Save This paper presents a theorem concerning the dynamic range of the Hopfield neural network. We show that the input voltage of each neuron in the Hopfield network is bounded and the boundness is computed in a closed form which provides the foundation for designing physical systems, such as electronic circuits. Related Articles | Metrics | Comments（0）

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DEVELOPMENT OF POLYIMIDE FILM-BASED CAPACITIVE TYPE HUMIDITY SENSOR LOU RUFANG, LU YUPING, BIAN WEIYONG, ZHU QINYANG, CHEN YUNAN, LI XIAOHONG, ZHANG JIANAN Journal of Applied Sciences    1993, 11 (1): 86-90.   Abstract （771）      PDF（pc） （294KB）（141）       Knowledge map    Save This paper describes a capacitive type relative humidity sensor made of polyimide film. The device is fabricated with standard 10 processing techniques. We find the response curve is almost linear over the whole range of relative humidity; sensor hysteresis and inaccuracy are lower than ±3% RH; and the response time for 63.2% of a step change in humidity is less than 15s. The stability in high humidity, effect of temperature on the response character and principle of operation are discussed. Related Articles | Metrics | Comments（0） Cited: Baidu(16)

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EXPERIMENTAL STUDY OF SELECTIVITY FOR OPTIC-GAS SENSING OF SnO2:Sb FILM GUO SIGAN, ZHENG SHUNXUAN, YU YONGAN Journal of Applied Sciences    1993, 11 (1): 91-94.   Abstract （358）      PDF（pc） （249KB）（75）       Knowledge map    Save We observed the improvement of sensitivity of optio-gas sensing in ethanol vapour,and the reduction of sensitivity in acetone vapour when SnO2 film was mixed with, Sb (0.1Wt%). This may provide the experimental basis for developing an optio-gas sensing element having selectivity. Related Articles | Metrics | Comments（0）

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RECONSTRUCTION OF THE PERMITTIVITY PROFILE OF ONE-DIMENSIONAL GRADUALLY CHANGED MEDIUM BY USING AN EQUIVALENT NETWORK TECHNIQUE CUI TIEJUN, LIANG OHANGHONG Journal of Applied Sciences    1993, 11 (2): 95-103.   Abstract （293）      PDF（pc） （470KB）（65）       Knowledge map    Save In this paper, a general relation between the reflection coefficient and the permittivity is derived by using an equivalent network technique. By simple transform, a novel approximate analytic solution for reconstructing the permittivity profile is obtained, which is more generalized than the former relation[2,3]. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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INFLUENCE OF ADDITIVES ON GAS SENSITIVE CHARACTER OF TIN OXIDES ZHU WENHUI, XU JIAQIANG, YAN KEQIU Journal of Applied Sciences    1993, 11 (2): 104-108.   Abstract （382）      PDF（pc） （363KB）（121）       Knowledge map    Save In this paper, chemical co-precipitation and impregnation are adopted to make gas sensitive, SnO2 by doping it with 15 additives. The structure and component of the materials are then studied with TEM, XED and XPS, and the gas sensitive character ia tested by means of static state. Results show that SnO2 doped with Ag, CuO and ZnO, which are cheap, can be used to make inflammable gas sensors; that the doping of ZnO and Re2O3 can improve the alcohol selectivity of SnO2; that Sb2O3 markedly reduces the electrical resistance of SnO2; and that there exist phase reactions between the addtives Ag, CeO2 and the material SnO2, thus influencing the binding energy of Sn3d. Related Articles | Metrics | Comments（0）

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SCALING CALCULATION FOR RCS OF LOSSY TARGETS FURTHER DISCUSSION ON THE SIMILARITY OF LOSSY ELEOTEOMAGNETIO SYSTEMS SHI ZHENDONG, YANG SHIWEN, DING CHUNSHENG Journal of Applied Sciences    1993, 11 (2): 109-114.   Abstract （349）      PDF（pc） （376KB）（90）       Knowledge map    Save In this paper, the theory of similarity and dimensional analysis are used for the scaling measurements of EOS of lossy targets'. Scaling calculation formulas between the prototype and models have been derived. By means of these formulas, the EOS of the prototype can be inferred precisely from the measured values of models, even though they do not meet the condition of physical similarity. Related Articles | Metrics | Comments（0）

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HIGH-BIREFRINGENCE-FIBER POLARIZATION COUPLER JIN ZHBNHONG, HUANG ZHAOMING, XIAO WBINIAN Journal of Applied Sciences    1993, 11 (2): 115-118.   Abstract （433）      PDF（pc） （1036KB）（222）       Knowledge map    Save In this paper, we present a new polarization coupler using high-birefringence-fiber. This kind of device previously reported was based on the application of mechanical force on a comb-like plate. We made this device by using the PZT material, so the coupling strength can be controlled by an electrical signal. The device is easy to use and very good waveform has been obtained. Related Articles | Metrics | Comments（0）

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A NEW PARAMETER FOR THE CHARACTERIZATION OF POWDER SURFACE WANG PING, GUO HONGYOTJ, SONG LANHUA, HUANG YULI Journal of Applied Sciences    1993, 11 (2): 119-124.   Abstract （421）      PDF（pc） （381KB）（104）       Knowledge map    Save A new parameter, ATRHL (adhesion tension ratio of hydrophilic liquid to lipophilic liquid in contact with powder) used for the characterization of powder surface has been put forward. The measurement of ATEHL for powder is based on the adhesion tension of distilled water and toluene in contact with powder. Thus ATKHL expresses the hydropilic-lipophilic degree of the powder surface. Related Articles | Metrics | Comments（0） Cited: Baidu(2)

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FORMATION OF pn JUNCTION WITH CoSi2 CONTACT BY SOLID STATE INTERACTION OF Co WITH DOPED Si AND ASENIC BEHAVIOR DURING THE INTERACTION LIU PING, LI BINGZONG, JIANG GUOBAO, HUANG WEINING, GU ZHIGUANG Journal of Applied Sciences    1993, 11 (2): 125-130.   Abstract （487）      PDF（pc） （464KB）（71）       Knowledge map    Save This work studied the technology of formation of pn junction and self-aligned CoSi2 film contact on Si doped with B P As by diffusion or ion implantaion. Ion beam sputtering was applied for Co film deposition, and solid state interaction of Co/Si was performed by rapid thermal process (RTF) to form CoSi2 films. The sheet resistances of doped Si regions decreased by an order of magnitude after CoSi2 formation. For the samples implanted with As, the effects of different thermal processes on As redistribution during interaction of Oo/Si were investigated. Experimental results indicated that in the case of conventional process (As was activated prior to CoSi2 formation), a snowplow effect of As during interaction of Co/Si was observed. In the case of concurrent process (As activation and interaction of Co/Si were carried out in one step), As exibited an obviously different behavior. The spreading resistance probe and electrical characterization showed that, for either of the above two cases, a high.carrier concentration can be produced at the interface of CoSi2/Si, and the pn junctions with CoSi2 contact exibited good I-V properties, and their leakage current was much less than that of the comparative pn. junction with Al/Si contact. Related Articles | Metrics | Comments（0）

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DETERMINATION OF THE PULSE WIDTH OF PULSED MAGNETIZING FIELD FOR A RARE EARTH MAGNET WITH HIGH COERCIVE FORCE FU ZHIYU, XU MEIJIE Journal of Applied Sciences    1993, 11 (2): 131-135.   Abstract （301）      PDF（pc） （370KB）（68）       Knowledge map    Save An effective device which can generate the pulsed magnetizing field is shown. The approximate expression for the pulsed magnetizing field is derived, and its pulse width and peak intensity related to the circuit elements are given. A reasonable physical model which describes the magnetization process and involves the magnetic hysteresis and eddy current is presented, and the numerical computation is made. The pulse field widths which are required to magnetize the specific magnets are determined, and the useful design parameters are obtained. Related Articles | Metrics | Comments（0）

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THICKNESS DISTRIBUTION OF THIN FILM DEPOSITED WITH MAGNETRO-SPUTTERING FAN ZHENGXIU, XUE SONGSHENG, HE ZHAOLING Journal of Applied Sciences    1993, 11 (2): 136-140.   Abstract （607）      PDF（pc） （281KB）（105）       Knowledge map    Save Thickness distribution of thin films deposited with magnetro-sputtering is studied in this paper. Theoretical analysis tand value calculation are conducted under three conditions when the substrate is fixed; when the substrate is rotating; and both the substrate and the workshelf are rotating. It is shown that the distribution mainly depends on the highness of the substrate. Very uniform thin film is deposited on the substrate by adjusting the highness of the substrate and and distance between the target and the rotating center, as proved by experiments. Related Articles | Metrics | Comments（0） Cited: Baidu(10)

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AN APPROACH TO THE ASYMPTOTIC SOLUTION OF OSCILLATORY TAIL OF REFLECTIVE INITIAL VALUE PROBLEM OF KdV EQUATION ZHOU GUANGHUI Journal of Applied Sciences    1993, 11 (2): 141-146.   Abstract （297）      PDF（pc） （393KB）（83）       Knowledge map    Save Assume that the solution of KdV reflective initial value problem equals the sum of the pure-soliton part and the non-soliton part, and the latter is comparatively small. Then the equation satisfied by the non-soliton part is linearized and the solution of asymptotic oscillation form is obtained directly by means of Fourier Transformation. After solving the discrete spectrum of the time-independent Schodinger equation associated with the initial value by some proper method, the pure-soliton expression is available according to 1ST. Through the calculation of specific initial value examples, the results obtained in this paper are found to be consistent with those of the references. Related Articles | Metrics | Comments（0）

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THE RELATION AMONG THE RATE OF PROFIT, RATE OF PUMPING HEAT AND COEFFICIENT OF PERFORMANCE OF A THREE-HEAT-SOURCE HEAT PUMP YAN ZIJUN, CHBN JINCAN Journal of Applied Sciences    1993, 11 (2): 147-151.   Abstract （389）      PDF（pc） （323KB）（63）       Knowledge map    Save A general relation among the rate of profit, rate of pumping heat and coefficient of performance of a three-heat-source heat pump is given in this paper. By using it, the relation between the optimal rate of profit and coefficient of performance of an endoreversible three-heat-source heat pump is derived and the optimal criterion of the coefficient of performance is discussed. The conclusions obtained have a certain instructive meaning for the optimal design and the performance improvement of a class of three-heat-source heat pumps such as absorption heat pumps, chemical heat pumps, and so on. Related Articles | Metrics | Comments（0） Cited: Baidu(7)

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STUDY AND IMPLEMENTATION OF A BROADBAND COMMUNICATION SUB-NETWORK IN ACCORDANCE WITH MAP ZHANG ZHENCHUAN, WANG YUBXIAN, WANG GUANGXINO Journal of Applied Sciences    1993, 11 (2): 152-158.   Abstract （405）      PDF（pc） （478KB）（74）       Knowledge map    Save A broadband network designed in accordance with MAP is considered to be indispensable for the computer integrated manufacturing system (CIMS) in automated factories. So the research and development of its protocols, software, and hardware are very much emphasized. In this paper, a broadband communication sub-network implemented in accordance with MAP is introduced. It mainly consists of three lower layers, the physical, data link and network layers of the ISO/OSI Eeference Model. The data transfer experiment in the communication Sub-network has been successfully done in our laboratory. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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THE COMPUTER QUANTITATIVE ANALYSIS OF SOIL MICROSTRUCTURE ZHANG DIANCHENG, YANG JINGAN, LI YUN, LING ZEMIN Journal of Applied Sciences    1993, 11 (2): 159-165.   Abstract （435）      PDF（pc） （2206KB）（69）       Knowledge map    Save This paper proposes an algorithm of image segmentation based on pattern classification according to the features of soil microphotographs. The algorithm can overcome the influence of holes in the soil particles on extracting the parameters. Finally, a new general tracking boundary method is used to acquire the quantitative parameters of the soil particles. The methods and techniques presented in this paper are very useful for studying the properties of the soil particles under variance and destruction of particle shapes caused by forces. Related Articles | Metrics | Comments（0）

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A METHOD TO FORM a-Si:H/a-SiC:H MULTILAYER AMORPHOUS FILM WITH LASER CVD AND THE RESEARCH OF ITS OPTICAL CHAR ACTERISTICS WU DINGXIANG Journal of Applied Sciences    1993, 11 (2): 166-170.   Abstract （328）      PDF（pc） （321KB）（69）       Knowledge map    Save This paper introduces a method of analysing gas by photochemical reaction of laser to form an α-SiH/α-SiC:H multilayer structure amorphous film, and discusses its optical characteristics measured with XPS and other means. Related Articles | Metrics | Comments（0）

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THE PARAMETER VIBRATION EXCITED BY NON-LINEAR ELECTRO-MAGNETIC FORCES IN A LOW-SPEED A.C.MOTOR QIU JIAJUN Journal of Applied Sciences    1993, 11 (2): 171-179.   Abstract （337）      PDF（pc） （562KB）（70）       Knowledge map    Save A unified mathematical system is suggested for relating the rotor non-linear vibration equation of a low-speed multipolar A. C. motor with the steady-state three-phase nonsymmetric circut equation. The first order approximate solution is obtained. Curves for the amplitude characteristic, the transient process through the zone of resonance, and the process in the starting vibration of the parameter resonance are computed. Experimental research is carried out and results are shown to be in good agreement with the theoretical results, thus revealing the rules of this vibration. Related Articles | Metrics | Comments（0） Cited: Baidu(2)

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DYNAMICAL DETERMINATION OF SMOKE CONCENTRATION BY SCATTER LIGHT AND THE MODEL USED LIU KUOWEI, MAO JINGYING, ZONG OHUNYING, WANG ZHIZHENG Journal of Applied Sciences    1993, 11 (2): 180-183.   Abstract （470）      PDF（pc） （255KB）（92）       Knowledge map    Save In this paper, the relative concentration of smoke in the dynamical atate is determined by means of scatter light. Experiments demonstrate that scatter light is increased with the increase of smoke concentration in a given scale; that scatter light has to do with its wavelength, there being an optimal scatter light wavelength; and that with the change of Smoke concentration, scatter light manifests three character regions. Upon this, a model is suggested for the float system consisting of large particles of smoke. The three character regions can be explained by means of this model qualitatively. Related Articles | Metrics | Comments（0）

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PRACTICAL ALGORITHMS FOR DISTINGUISHING ISOSPECTRAL MOLECULES ZHANG ZHINAN, LIU YUTING, ZHU WEIBAO, CHEN QIAN, DONG DATING, ZHANG JIANKANG Journal of Applied Sciences    1993, 11 (2): 184-188.   Abstract （541）      PDF（pc） （297KB）（57）       Knowledge map    Save How to practise a kind of exact algorithm for obtaining the characteristic polynomial of a 0-1 matrix, particularly a Hucker matrix, is presented in this paper. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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TRENDS OF THE DEVELOPMENT OF ELECTRONICS TECHNOLOGICAL REVOLUTION IN THE TRANSCENTURY PERIOD LUO PEILIN Journal of Applied Sciences    1993, 11 (3): 189-198.   Abstract （382）      PDF（pc） （805KB）（79）       Knowledge map    Save The status and trends of the development of the ELECTEONICS TECHNOLOGICAL EEVOLUTION in the trans-century period are depicted. The ever culminating fast trend towards great concentration, integration, distribution and pervasion is most prominent, and the ADVANCED (ELECTRONICS) CULTURE INFORMATION TECHNICAL SYSTEM is completing its process of integration into the entirety. This is indeed another great technological revolution since the appearance of the printing machine during the Renaissance, but far more penetrating, pervasive and sophisticated. This very trend is illustrated by examples of automation in contemporary industrial practice, in the advance in tele-communication and in the Gulf War. As a consequence, the author asserts that it is a great technological revolution in both material civilization and spiritual civilization spheres. In the development, microelectronics and microfabrication are now attaining new height of the state of the art. "Hard" and "soft" basic elements necessary for the development of electronics are being given imperative priority. Processes, materials, man-machine interface and computer aids to every facet are stressed.It may therefore be said that electronics is currently reaching the adulthood.Numerous contemporary achievements and subjects of the development are mentioned. Related Articles | Metrics | Comments（0）

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MILLIMETER-WAVE RADAR TECHNIQUE FOR MEASURING CHARGE LEVEL IN BLAST FURNACES DING YIYUAN Journal of Applied Sciences    1993, 11 (3): 199-205.   Abstract （469）      PDF（pc） （477KB）（89）       Knowledge map    Save The paper describes a new millimeter-wave real-time three dimensional FMCW imaging radar system used to obtain the image of charge level in the blast furnace. The imaging principle, design idea and characteristics of the radar system are expounded, and some successful results of system testing on a simulation blast furnace are presented. This technique is the first ever applied to the testing of the charge level in blast furnaces at home and abroad. Related Articles | Metrics | Comments（0）

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STUDY ON FUZZY RECOGNITION AND FUZZY OPERATING NETWORK ALGORITHM ZHENG DELING, XIONG QIANG Journal of Applied Sciences    1993, 11 (3): 206-212.   Abstract （311）      PDF（pc） （468KB）（72）       Knowledge map    Save In this paper, we present a fuzzy recognition method; the original fuzzy set is expressed in the distributed fuzzy sets. A new mechanism for knowledgerepresentation and inference——the fuzzy operating network——is proposed. Itcan be used to represent fuzzy knowledge conveniently and to process knowledge rapidly. The result in the intelligent control is very satisfactory. Related Articles | Metrics | Comments（0）

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THE ELECTROMAGNETIC SIMILITUDE OF THE OBJECT CONTAINING LOSSY MATERIALS AND THE RCS SCALED-DOWN RELATIONSHIPS OF THE COATED PLATE ZENG XUEGANG, LIN WEIGAN, EUAN CHENGLI Journal of Applied Sciences    1993, 11 (3): 213-218.   Abstract （359）      PDF（pc） （393KB）（95）       Knowledge map    Save The electromagnetic similitude conditions of the object containing lossy materials and the scaled-down relationships of the variables considered are derived in this paper. As an example, the RCS scaled-down relationship of a coated plate is studied here. Related Articles | Metrics | Comments（0） Cited: Baidu(1)

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PARALLEL PROCESSING IN THE SIMULATION OF COMMUNICATION NETWORKS ZHU TAO, CHENG SHIXING Journal of Applied Sciences    1993, 11 (3): 219-225.   Abstract （259）      PDF（pc） （483KB）（86）       Knowledge map    Save Parallel simulation is a practical technique to boost up the efficiency of simulation. The probability to apply this technique to the simulation of communication network is discussed in this paper. A centralized asynchronous scheme of parallel simulation on communication under the Transputer/OCCAM environment is presented, the control mechanism and working flow chart are given in detail, and methods to analyse the performance of parallel simulation are discussed. Related Articles | Metrics | Comments（0）

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THE STUDY ON A 150 MHz INTELLIGENT REFLECTION SCANNING ACOUSTIC MICROSCOPE AND ITS IMAGE PROCESSING FUNCTION CHEN GELIN, HU SIZHENG, LUO SHUYUN, ZHANG KEQIAN, SHEN ZHONGMING, XU ZHENGYTIAN Journal of Applied Sciences    1993, 11 (3): 226-234.   Abstract （322）      PDF（pc） （3763KB）（66）       Knowledge map    Save Tne intelligent 150 MHz SAM is described in this paper. A current microcomputer is used as the central control part, the image being displayed on the terminal. The instrument has a high resolution on the surface and in the deep region of a structure, thus a structure of 20μm lateral dimension located at 5.1 mm from the surface can be observed. The microscope also possesses the function of image processing and of analysing specimen parameters. These facts show that the microscope is of practical value. Related Articles | Metrics | Comments（0）

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THE STUDY ON FUNCTIONAL DIFFERENTIAL EQUATIONS IN HIGH SPEED MECHANISMS ZHANG OHANGBO, YU YUANHONG Journal of Applied Sciences    1993, 11 (3): 235-240.   Abstract （362）      PDF（pc） （323KB）（71）       Knowledge map    Save In this paper we consider the functional differential equations of second order (r(t)x'(t))'+a(t)xa(t-τ(t))=f(t) (A) where 0 < α < 1 and α is a ratio of odd integers. The equations have extensive applications to high speed mechanisms. Several sufficient conditions have been found to ensure that all oscillatory solutions of (A) approach zero asymptotically. Related Articles | Metrics | Comments（0）

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KNOWLEDGE REPRESENTATION BASED ON FUZZY SET THEORY AND NEW PLAUSIBLE INFERENCE ALGORITHMS PMLIFS-I AND PMLIFS-Ⅱ WANG SHITONG Journal of Applied Sciences    1993, 11 (3): 241-247.   Abstract （317）      PDF（pc） （464KB）（64）       Knowledge map    Save In this paper, the knowledge representation based on the fuzzy set theory is investigated, and a new plausible inference algorithm PMLIFS-I is presented. Then in terms of the new concept of λ-composition, the improved algorithm PMLIFS-Ⅱ of algorithm PMLIFS-I is presented. Both algorithms are useful and significant. Related Articles | Metrics | Comments（0）

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