Wen Zhiyu He Qingyi Jiang Yongqing Lin Peng Jiang Ziping
1998, 21(4). DOI: 10.11835/j.issn.1000-582X.1998.04.001
Abstract:阐述了真空微电子触觉传感器的工作原理。采用半导体集成电路加工技术和硅微各向异性腐蚀及氧化锐化工艺,在电阻率为3~5Ω·cm的n型(100)硅片上制备了真空微电子触觉传感器的场致发射阴极锥尖阵列,锥尖密度达3900个/mm2,起始发射电压为2~3V,反向击穿电压大于30V,收集极在20V在电压时,单尖发射电流达0.2μA,实验结果表明这种真空微电子触觉传感器具有良好的触觉效应。
1998, 21(4). DOI: 10.11835/j.issn.1000-582X.1998.04.002
Abstract:This paper describes an application of evolutionary programming (EP) to economic dispatch with valve point loading.Some technical problems (representations of candidate solutions,evaluation function,mutation operator) have been solved to expand the applica be prospects of the computatimal methods of economic dispatch.The proposal method is applied to a 6 bus 3 generator system and compared with the genetic algorithm(GA).Numerical results demonstrate the validity and effectiveness.
Zhou Shangqi Ren Qin Fan Qinlin
1998, 21(4). DOI: 10.11835/j.issn.1000-582X.1998.04.003
Abstract:The surface phase constituent of the 25Cr2MoVA steel has been analysed after conventional and rapid ion nitridings.The relation between the tempered temperature and the phase constituent has been investigated.
1998, 21(4). DOI: 10.11835/j.issn.1000-582X.1998.04.004
Abstract:This paper proves some properties of the efficient margin in portfolio combinatorial investment and presents a methematical model for calculating the optimal weighted vector of portfolio combinatorial investment
Sun Dongye Qin Datong Yang Yalian
1998, 21(4):1-6. DOI: 10.11835/j.issn.1000-582X.1998.04.005
Abstract:Based on the kinematic and kinetic characteristics, the friction model of a metal pushing V(belt continuously variable transmission (CVT) is established in this paper. The relation between applied forces and speed ratio as well as transmitted torque is analysed. The coputational formulas on the tension forces of steel ring and compression forces between metal blocks are derived. The theoretical bases for designing a metal pushing V belt CVT equipment and its control system are provided.
Yan Ping Yi Runzhong Liu Fei Ma Zujun
1998, 21(4):7-11. DOI: 10.11835/j.issn.1000-582X.1998.04.006
Abstract:A fuzzy neural network(FNN) of detection for moving object based on BP algorithm is described in this paper.The correctness of the FNN in signal detection for moving object and fault diagnosis for instrument is proved by experiments.
Rong Mei Zhang Guangquan Shen Yidong
1998, 21(4):17-22. DOI: 10.11835/j.issn.1000-582X.1998.04.008
Abstract:Two main approaches are used in qualitative diagnostic reasoning.These approaches are the first principle approach and the heuristic knowledge approach.Systems based on the first one can handle hard problems and new situation.On the other hand,systems based on the second perform diagnostic tasks faster but can deal only with the most common problem cases.This paper provides a model using both the deep and shallow knowledges, and presents some algorithms.
1998, 21(4):23-28. DOI: 10.11835/j.issn.1000-582X.1998.04.009
Abstract:A theoretical analysis of the Resonant DC Base High Frequency Inverter is given. A optimal control scheme for the short circuit current of the resonant inductor is proposed. The system parameters,output current,output voltage and characteristics of the Resonant DC Base in this scheme are analysed. In the theoretical analysis the load is supposed as a resistor to void the calculating error while the load is treated as a constant current source. The analysis and test result have proved that the optimal parameters of the Resonant DC are only determined by the load resistance and the output frequency.
1998, 21(4):29-33. DOI: 10.11835/j.issn.1000-582X.1998.04.010
Abstract:试验研究了混合气体保护焊焊接18MnMoNb钢时,在Ar中加入2% ̄4%O2后,对电弧稳定性、短路过渡、焊丝熔化速度及焊缝成形的影响。
1998, 21(4):34-38. DOI: 10.11835/j.issn.1000-582X.1998.04.011
Abstract:A new method for evaluation of transversal economic benefits is researched by fuzzy neural networks, BP algorithm is used to learn the connection weights of the fuzzy neural networks and partitions of fuzzy subsets. It has been shown by the modeling and evaluating results about the economic benefit index system of ten enterprises that the method has reinforcement learning properties and universalized capabilities. with respect to modeling and evaluating of nonlinear systems which have some uncertainties, the method is available.
Liao Ruijin Sun Caixin Gu Leguan Lu Shenghe
1998, 21(4):44-48. DOI: 10.11835/j.issn.1000-582X.1998.04.013
Abstract:The problem that the internal electrical interference is nuavoidable for differential coil in measuring fast high current impulse is discussed.The shielded differential coil which has a chink in the middle of its shield can reduce this interference,and that the signal to noise ratio of the differential measurement is 27 shows the anti interference efficiency of this coil.Furthermore,the double differential coil which use the differential balanced technique to resisting the interference make the signal to noise ratio of the differential mearsurement be 57.
Ding Li Tang Shengli Yang Chen He Zhiwei
1998, 21(4):55-60. DOI: 10.11835/j.issn.1000-582X.1998.04.015
Abstract:Using modular simulation technique,a mathematical model for the combustion and air/gas system of the W shape flame boiler is presented.The experimental resulats show that.The dynamic process accords with the mechanism process of the object.
1998, 21(4):73-78. DOI: 10.11835/j.issn.1000-582X.1998.04.018
Abstract:Based on the fundamental principle of the fractal theory, the fractal characteristics of the decision making mapping model for manufacturing and its modeling process are discussed. The principle of modeling for defcision-making mapping models by the fractal theory is proposed.
Qin Dongxing Qin Datong Shi Wankai
1998, 21(4):79-83. DOI: 10.11835/j.issn.1000-582X.1998.04.019
Abstract:Based on the theory of conjugate surface and computer graphics, a solid modeling method of hourglass worm gearing is presented. Assembly simulation of worm gearing is carried out, clearance and interference between meshing tooth surfaces are analyzed, and effects of machining and modification of assembling parameters on meshing and contact between tooth surfaces are investigated.
Li Huaji Li Gesheng Zhang Rong Zhen Bingren
1998, 21(4):84-89. DOI: 10.11835/j.issn.1000-582X.1998.04.020
Abstract:This paper has simulated numerically the 2D temperature field and stress field of main circle pump shell steel castings of nuclear power plant by finite element method,predicts the dispersed shrinkage,shrindage and hot hearing.The real dissecting pouring castings had the same results as the numerical simulation.At the same time the authors evaluat the molding design of the pump shell castings.
Yan Ping Wang Zhijie Zhao Xianyuan Liu Fei
1998, 21(4):90-93. DOI: 10.11835/j.issn.1000-582X.1998.04.021
Abstract:In this paper,more carefully study has been discussed to the traditional MRP capacity cutting method ,the default is found. The optimizing thought is introduced in capacity cutting .A mathematical model of this problem is established . Base on this model, a new scheduling algorithm is put forward.
1998, 21(4):94-98. DOI: 10.11835/j.issn.1000-582X.1998.04.022
Abstract:The necessity,basic concepts and its key techniques of active vibration control for high rise and flexible civil infrastructures are expounded and the current research situation and its problems that still existed are introduced,and it is pointed out that making structures smart/intelligent is a new important way to ensure the structures safe and durable.
1998, 21(4):99-104. DOI: 10.11835/j.issn.1000-582X.1998.04.023
Abstract:This paper prieseuts comprehensively new development of transmission researches about the optical solitons in optical fiber tele communication systems abroad,including:1.N soliton interaction in optical fiber;2.pulse propagation in the fiber;3.the femtosecond soliton soliton interaction in dispersion shifted fiber;4.strongly coupled nonlinear parametric solitary waves;5.higher order effects in bandwidth limited soliton propagation in optical fibers;6.suppression of noise accumulation in band width limited soliton transmission by means of nonlinear loop mirrors.
Wu Zhongfu Fu Yunqing Wang Kang Li Hua
1998, 21(4):105-110. DOI: 10.11835/j.issn.1000-582X.1998.04.024
Abstract:The education modes and contents involved in the management of distance education are first analyzed in the paper, and the preliminary implementation based on CERNET and Internet is followed. The techniques of WWW servers efficient access to database and system security are presented in addition.
1998, 21(4):111-116. DOI: 10.11835/j.issn.1000-582X.1998.04.025
Abstract:The influence of the arrangements of pipes on gas solid flow characteristics in the dense section of standpipe in the circulating fluidized bed is studied on a cold state experiment platform.The influence relationships of the percentage of area of pipes in the standpipe cross section and section shape of pipes and the circulation rate,adjusting range and distribution percentage of loose air are studied emphasizedly.
Shi Weiren Liang Shan Xie Zhaoli
1998, 21(4):117-122. DOI: 10.11835/j.issn.1000-582X.1998.04.026
Abstract:The inner process of the distillator is a multimode dynamic process.To a great extent quality of the spirits depends on operation of the distillation.On the basis of studying spirits distillation principle the authors,propose an ideal of using inner temperature in canonical operation circumstances as the descriptive language of expert knowledges in the domain of the spiritis distillator.
1998, 21(4):123-126. DOI: 10.11835/j.issn.1000-582X.1998.04.027
Abstract:This paper presents an optimal combinatorial forecast method for the future profit of assets.
1998, 21(4):131-134. DOI: 10.11835/j.issn.1000-582X.1998.04.029
Abstract:讨论了波函数在原点的奇异性问题及其与势场的关系,指出在保证径向波函数平方可积,即积分∫│Rnl(r)│^2r^2dr有限的前提下,出现Rnl(0)=∞的奇异性,在物理上是可以接受的。然后,将具有这种奇异性的波函数应用于类氦原子基态能量的计算,并通过对结果的分析指出,采用形如R0(r)=Cr^50e-z-β/1+s0(0〉s0〉-1/2)的奇性径向波函数,相当于将两电子间除屏蔽效应之外的关联作用,等