LIU Jin-jiang , HE Pin , LIU Jing-cheng , LIU Fei
1999, 22(4):1-5. DOI: 10.11835/j.issn.1000-582X.1999.04.001
Abstract:A distributed scheduling method in a networked manufacturing enviroment is given. A allocation algorithm for dynamic tasks in distributed systems based on LAN information in factories is introduced. The design goal is to obtain some better comprehensive targets, such as cost price, load balance, waiting time and efficient of systems.
LI Bin , ZHANG Gen bao , XU Zhong jun
1999, 22(4):6-12. DOI: 10.11835/j.issn.1000-582X.1999.04.002
Abstract:The relevent concepts of tensor analysis into the study of computer aided tolerancing(CAT) are introduced,and the general method for seeking the sencitivity coefficients of the mechanical problems with explicit constrains is derived.The results are invariant in any coordinate system,and the concept are clear.The method is easy to be realized on a computer.
ZHAO Xiang yuan , YAN Ping , WANG Zhi jie , YU Li , LIU Fei
1999, 22(4):13-17. DOI: 10.11835/j.issn.1000-582X.1999.04.003
Abstract:Furnace is the most important equipment in ceramics produce.In order to realize tactics of JIT,a optimal model of roller furnace is given out,and discuss the problem of solving E/T furnace shop scheduling by genetic algorithm.Contrast of genetic algorithm and EDD rule is carry out by computer simulation,the results indicate that the genetic algorithm is better and more practical.
LIU li , QIU Xian-de , HUANG Mu-kun , YAN Zong-ling
1999, 22(4):28-33. DOI: 10.11835/j.issn.1000-582X.1999.04.006
Abstract:Damage evolution processes of bedded composite rock have been studied by use of acoustic emission method. The process and characters of damage acoustic emission between different kinds of rocks are compared, and useful results are obtained.
YU Yi-qiao , BAI Ben-xuan , LI Shuai
1999, 22(4):34. DOI: 10.11835/j.issn.1000-582X.1999.04.007
Abstract:The sources and characters of thoron 220 Rn in the buildings, the pattern of indoor thoron 220 Rn's concentration and the assessment of hazard which it brings to human being are discussed,and the method of measurement of indoor thoron's concentration is expounded and the measure for reducing thoron 220 Rn in the buildings is also pointed out.
YI Shu ping , YUAN Qing min , SONG Zhu min
1999, 22(4):40-44. DOI: 10.11835/j.issn.1000-582X.1999.04.008
Abstract:An adaptive control system of the feeding movement of WEDM machine based on monitoring and identifying the machining status is developed.The system samples the pulses of gap voltage and current,identifies the pulses representing different status by the given threshold value and a logic algorithm circuit,and employs 8253 chip to account the percentage of normal pulses within specific interval to obtain the time series data for filling a AR(N) model which used to forecast and avoid short circuit along with output the manipulative value to control the feeding speed.Experiment results show that the percentage of normal pulses is obviously improved.
WANG Wen li , HUANG Shi qi , XIE Zhi jiang , LI Hong yu
1999, 22(4):45-48. DOI: 10.11835/j.issn.1000-582X.1999.04.009
Abstract:介绍了一种齿轮箱信号分析与故障诊断系统,该系统以“三谱二时域”综合诊断法为理论基础,并将共振解调技术应用于齿轮箱故障诊断中。
CHEN Dong-yi , CAO Chang-xiu , ZHU Bing-lian
1999, 22(4):49-53. DOI: 10.11835/j.issn.1000-582X.1999.04.010
Abstract:Discuss the problem resulting from applying Mallat 's pyramid algorithm to process one dimensional signal . A formula for constructing scaling function and wavelet function according to second sampling interval and the corresponding formula for computing continuous approximation and detail are given .
1999, 22(4):54-57. DOI: 10.11835/j.issn.1000-582X.1999.04.011
Abstract:The introduction of the asynchronous transfer mode(ATM) concept has significantly influenced the coding theory.According to the characteristics of the ATM network,using the advantages based on the wavelet transform,how to apply the wavelet transform to plane separation and how to apply VBR coding to the layered data are discussed.The results of experiment are described respectively.
CHAI Yi , HUANG Xi-yue , SHI Wei-ren , HUANG Han ming
1999, 22(4):58-62. DOI: 10.11835/j.issn.1000-582X.1999.04.012
Abstract:The combination of the measured real time state acquisition from the process with predictive process for the fature state is used to predicate the variable tendency for process state. This method is useful to avoid delay and enhance real time ability of the control information of the expert system. Also a described knowledge and structure of real time process state are proposed. This system can be applied to other kind of practice systems with slow time variable, uncertainty and delay.
LU Zhi jun , SUN Cai xin , CHEN Wei gen , LU Sheng he , DU Lin
1999, 22(4):63-68. DOI: 10.11835/j.issn.1000-582X.1999.04.013
Abstract:This paper illustrates the methods of extracting characteristic parameters and deformation recognition using wavelet transfor,which applied in low voltage impulse(LVI) method on the transformer winding deformation detection.The results show that it is effective to eliminate the noise using wavelet transform,meanwhile,it can also make measurement has repetitivity and has a property on model recognition on defomation.
SONG Guan bin , WU Ze zhi , LONG Mian , WANG Xiang , CAI Shao xi
1999, 22(4):74-77. DOI: 10.11835/j.issn.1000-582X.1999.04.015
Abstract:A SDS PAGE technique is adopted to investigate the change of membrane cytoskeleton protein for hereditary spherocytosis(HS).The membrane vicoelastic properties are determined by the micropipette aspiration technique.The results show that the membrane elastic modulus of HS erythrocyte hase no remarkable difference but the viscosity is significantly higher than normal cells and the deformability of HS erythrocyte is reduced.It is discovered that spectrin,band 3 and band 5 of HS erythrocyte are partly deficient;the membrane thiol groups concentration of HS erythrocyte is lower than normal cells.These results suggest that the integrity of the struture and ingredient of the cytoskeleton protein networks plays an important role in deformability of erythrocvte.
1999, 22(4):78-81. DOI: 10.11835/j.issn.1000-582X.1999.04.016
Abstract:On the basis of the method of linear finite element and taking the advantage of the theory of finite element extrapolation,the paper discusses the method for calculating the eigenvalue of waveguide.The results show the method is simple and has higher accuracy.
1999, 22(4):87-91. DOI: 10.11835/j.issn.1000-582X.1999.04.018
Abstract:进行了心音图运动的试验的定量方法的预测准确性,敏感性和特异性的研究。对30例志愿者进行了PCGET试验,结果表明,对PCET运动前后心脏变心性状态评估的预测准确性为100%,敏感性和特异性分别为97%和100%,PCET的预测准生高,敏感性和特异性强。
1999, 22(4):92-96. DOI: 10.11835/j.issn.1000-582X.1999.04.019
Abstract:介绍了基于PC总线的虚拟仪器需要解决的一些问题,详细说明了则试分析仪面板的设计原理及方法。以虚拟波形显示与数据记录仪和虚拟小波变换分析仪为例,剖析了仪器软件的设计方法。
CHEN Deng-fu , LIU Ren-da , XU Chu-shao , YAN Guang-ting
1999, 22(4):97-102. DOI: 10.11835/j.issn.1000-582X.1999.04.020
Abstract:In the established model, the cooling differences are considered between the surface of inner radius and that of outer radius, and in the transverse direction of thin slab. And the conception for the effective coefficient of spraying water in continuous casting is firstly put forward. According to different casting speeds and different cooling zones, different time step lengths are adopted. In this model the heat transfer differences are thought over among vertical and curved zones, wide and narrow surfaces an well as angular zone of mould. The method of the corrected equivalent specific heat is used to deal with latent heat. The influence of forced convection is considered on heat transfer. Therefore, the model has higher accuracy and is consistent with the practice.
1999, 22(4):103-107. DOI: 10.11835/j.issn.1000-582X.1999.04.021
Abstract:针对管基为恒温,翅片上涂敷有一定厚度的吸附材料层在温度改变时的吸附状态况进行了分析,并提出了相应的物理,数学模型;采用有限差分法进行数值模拟计算,得到了翅片吸附层内温度分布以及吸附量随时间的变化规律。
1999, 22(4):108-113. DOI: 10.11835/j.issn.1000-582X.1999.04.022
Abstract:In order to socve the realistic problems happening in the process of M&A,the paper gives the fuzzy decision making method of cooperation choosing the best objective of M&A using the tool of fuzzy maths and applies the method to a case,which may be helpful to choose the best objective of M&A more scientifically.
ZHANG Li , RAN Jing-yu , LI Liang sheng
1999, 22(4):114-119. DOI: 10.11835/j.issn.1000-582X.1999.04.023
Abstract:Based on the motion equations of particles in the gas-particle rotary flow,the relationship among the equivalence particle diameter, characteristic time of the nonequivalence particle and their deposition efficiency is analyzed , and then the results of this study agree very well with the experimental data .
1999, 22(4):120-125. DOI: 10.11835/j.issn.1000-582X.1999.04.024
Abstract:研究了单圆内ρ级亚纯函数涉及导数,重值及小函数的Hayman方向的存储性问题,证明了类似于平面上的亚纯函数辐射分布的结果。
1999, 22(4):126-130. DOI: 10.11835/j.issn.1000-582X.1999.04.025
Abstract:The existence and Uni queness theorems of common coupled fixed point and coincidence points for a sequence of binary contraction mappings,canceled all continuous assumptions in uniformly convex Banach space.At the same time it generalizes anddevelops some known results.
1999, 22(4):131-134. DOI: 10.11835/j.issn.1000-582X.1999.04.026
Abstract:A type of disequilibrium quantitative economic model i.e.,an orientation model,that sample may be distinguished is discussed.Also a method of estimation is obtained.And the estimate is unbiased.