JIA Yan min , HE Yu lin , LUO Shu qiang , FU Hong qiao , YU Mei
2000, 23(4):1. DOI: 10.11835/j.issn.1000-582X.2000.04.001
Abstract:质量审核与评审在质量管理的过程中发挥着重要作用。传统仅靠人工进行的质量审核与评审越来越不能适应市场竞争的要求。利用现代信息技术,提出一种的质量审核与评审方式-在线质量审核与评审,建立了在线质量审核与评 模型,并介绍了其工作流程,给出了在Intranet环境下基于Web的三层Client/Server结构的解决方案,在线质量审核与评审可大幅度提高工作的效率更好的支持决策。
ZHAO Xiang yuan , LIU Fei , YU Li , DAN Bin
2000, 23(4):4-8. DOI: 10.11835/j.issn.1000-582X.2000.04.002
Abstract:Based on the Concurrent Engineering (CE) idea, we have established the development and manufacturing process model of the ceramic products and its supported environment, through studying the development and manufacturing of ceramic tableware in the ceramic industry. The key technology will be discussed in this paper. The achievements of researching, which has shortened product lead time and improved product quality, have been applied in ceramic enterprise.
2000, 23(4):9-14. DOI: 10.11835/j.issn.1000-582X.2000.04.003
Abstract:Wavelet analyses have been used for many fields deeply, especially , the wavelet transforms on compact support sets have been applied to signal dealing and image compression etc. However, the constructing of wavelet base is a hard work to do. In this paper, for N=2k the analysis structure of wavelet base on compact support sets are found successful. That is the general solutions structure of equations which fits to the wavelet base orthogonal conditions, Those formulas or algorithms make it very easily construct many filters of wavelet base, at the same time , Daubechies's filters and some other filters which are important in apllications have been tested correct; With the aid of our formulas , it is very easy to dynamically choose the wavelet bases.
JIANG Song , CHEN Guo xu , CHENG Xi-yun , CHENG Bo-shui , YU Hong-hua
2000, 23(4):15. DOI: 10.11835/j.issn.1000-582X.2000.04.004
Abstract:Aiming at the study of rare earth mischmetals as lubricant additives,an new oil-soluble lanthanum dialkldithiophosphate(LaDDP) is prepared as antiwear and extreme pressure additive,and its tribological performances are evaluated by four-ball mechine.The tribological decomposition reactions are simulated through mass spectroscopy.The tribochemical characteristics under boundary lubrication conditions are studied by means of AES and XPS.The tribological mechanism is suggested.The experimental results indicate that LaDDP possesses better lubrication ability than ZDDP.This can mainly be attributed to the formation of boundary film containing La,La 2O 3,FeS,sulphate,phosphate and lanthanum diffused layer.It indicates that the triblogical mechanism suggested is reasonable.
ZHU Cai chao , QIN Da tong , HONG Sha , RAN Zhen ya , XIE Yong chun
2000, 23(4):18-21. DOI: 10.11835/j.issn.1000-582X.2000.04.005
Abstract:The three ring reducer is a kind of gear drive developed in the past decade. Adopting the new conception of "parallel and movable axis" of multiple mechanisms, this kind of gear drive has many characteristics such as large transmission ratio, high efficiency and so on. As the three ring reducer has been invented only for ten years, up to date the design of the gear drive is only made with analogue method, no design theory can be followed, there exist serious vibration and noise in transmission, which limit its wide application in industry. In this paper, the transmission principle of SHQ50 reducer is studied, the surface noise distribution of the reducer, transmission ratio 49.5 , is measured and analyzed by means of sound intensity method. The 3D distribution maps of noise on top of reducer, input side and output side of reducer, and left side and right side of reducer are drawn. With the sound intensity frequency maps of each measuring point, the sources of giving out noise are analyzed. The reducer of low vibration and noise can be designed rightly according to the analysis.
2000, 23(4):22-25. DOI: 10.11835/j.issn.1000-582X.2000.04.006
Abstract:Pointing out the shortages of the traditional bar thread displacement transducer, brings forward new thought of designing difference phase degree division displacement transducer, which transforms the problem of measuring displacement directly in angle into the problem of measuring the difference between the phases of two signals which have the same frequency and then gets the displacement in angle indirectly. The theories on designing the phase difference calculation displacement transducer and correlation displacement transducer is suggested. Because the difference phase degree division displacement transducer, supported by the computer technology and the signal processing technology, adapts to the development of instrument's fictionzing and intelligentizings, it is an advanced technology.
LI Hua ji , LIU Chang ming , TAN Hui xin , XUE Han Song
2000, 23(4):26-29. DOI: 10.11835/j.issn.1000-582X.2000.04.007
Abstract:Opting for desirable modifiers is an important way to obtain coast Al-Si-Mg alloys with both high strength and good toughness properties.Structures,mechanical properties and hydroden contents of as-cast and as-heattreated A357 alloy are investigated by comparing modification effections of lanthanum(La)-rich mischmetal and Strontium (Sr).It is shown from our experiments that modification effections of La-rich mischmetal is better than that of Sr as Fe content in the alloy is lower than 0.11% in the aspects of removal of hydrogen from the alloy,refinement of entectic silicons and improvement of mechanical properties,therefore,La-rich mischmetal is a desirable modifier for Al-Si-Mg alloy.
WANG Xi , SHI Dao yu , LUO Da li , QIAN Jia yu , ZHONG Xian xing
2000, 23(4):30. DOI: 10.11835/j.issn.1000-582X.2000.04.008
Abstract:System structure of last CAD/CAM is described. Then machining principle of system output device named numerical controlled Last Carving machine is introduced. Furthermore, we lay stress on analyzing machining programming method making use of direct numeric definition. Special disposal is taken on step error and working frequency of step motors so that not only error accumulation is avoided but also step motors always work in the best frequency range. As a result, machining precision and speed of last are both enhanced as well as step motors' working safety is guaranteed.
HUANG Xiang nian , CHEN Ping , YANG Bo , ZHENG Sheng lin , PAN Bao chang
2000, 23(4):33-37. DOI: 10.11835/j.issn.1000-582X.2000.04.009
Abstract:The paper gives out an efficient and utility pre processing subsystem of on line recognizing free handwritten Chinese character, which includes the processes of data acquisition, normalizing character image, deleting the same points, inserting data points, linking strokes, extracting line segments and canceling useless line segments, and presents or improves a set of strategy and algorithm that has been applied in the subsystem. The results of preliminary experiments show that the subsystem has advantages of high degree of steadiness and tolerance to strokes variance.
ZHANG Ben niu , ZHANG Jun qian , HUANG Shang lian
2000, 23(4):38-43. DOI: 10.11835/j.issn.1000-582X.2000.04.010
Abstract:The deformation transfer from the loaded material to the piezoceramic sensor bounded on the surface of structures is investigated. The strain transfer factor, k , is proposed for the characterization of the deformation transfer from the material measured to the sensor. A three layer model, which consists of the sensor, the adhesive and the material measured, is used for modelling of the deformation within the structure/sensor system. Using a shear lag stress analysis method, the strain field within the three layer structure is analyzed. The closed form expression for the strain transfer factor is derived by using the strain field obtained. The influences of the thickness and the elastic modulus of the sensor and the adhesive on the k are predicted and illustrated.
LIANG Ying xian , ZHENG Rui lun
2000, 23(4):44-48. DOI: 10.11835/j.issn.1000-582X.2000.04.011
Abstract:The paper intends to go theoretically into the mechanism of physical chemistry of the preparation of Mo 2C film by using MOCVD.It has proved,by the result of experiment,in the process of the preparation of Mo 2C,that the two-step mechanism which Mo(CO) 6 should follow:firstly,Mo(CO) 6 is absorbed by the fundamental bottom and does a phase change;and secondly,it is decomposed.the process of decomposition of Mo(CO) 6 is a sequential one,which is finally carbonized into Mo 2C film from Mo.By applying Gibbs functional smallness principle to the calculation of Gibbs function of chemistry reaction in MOCVD when it deposits Mo 2C film,the best temperature of preparing film is probed.
WANG Bi ben , WANG Wan lu , LIAO Ke jun , XIAO Jin long
2000, 23(4):49-52. DOI: 10.11835/j.issn.1000-582X.2000.04.012
Abstract:In the paper, the enhancing process of diamond nucleation by negative substrate bias in hot filament CVD system was analyzed. Combining theory related to plasma and collision, the effects of bias on enhancing diffusion of active ions on substrate surface were primarily investigated theoretically, and the relative formulas of diffusion coefficient and diffusive distance with bias were given. The results showed that diffusion coefficient and diffusive distance increased with raising of negative substrate bias.
2000, 23(4):53-57. DOI: 10.11835/j.issn.1000-582X.2000.04.013
Abstract:On the basis of the geographic, climatic characteristics and air pollution conditions of Chongqing city, referring to the application and development of Municipal solid waste (MSW) treatment techniques developed recently in advanced countries and other domestic cities, Varieties of MSW treatment techniques, incineration, landfill, composting, and comprehensive utilization, are analyzed in comparison. Their applying prospects and limitations in Chongqing are marked out.
LIU Cheng lun , XU Long jun , XIAN Xue fu
2000, 23(4):58. DOI: 10.11835/j.issn.1000-582X.2000.04.014
Abstract:Kinetics characteristics of resolving of rock salt of Changshan in dynamic state have been studied by using conductance method and equipment made by ourself. The results show that the quantitative relationship between conductance(L) or concentration (c) of resolving solution in the process of resolving of rock salt and time t ( kinetics equation )is analogous to Langmuir equation for different flows in ambient temperature.Constant E or a increases with the increase of the flow( V ), whereas constant F or b constant decreases. The above 4 constants in dynamic state are smaller than those in static state.
XU Long jun , MU Chuan long , XIAN Xue fu , YIN Guang zhi , ZHANG Dong ming
2000, 23(4):60-63. DOI: 10.11835/j.issn.1000-582X.2000.04.015
Abstract:Under the condition of static state, adsorption characteristics of rock in Pb Zn mine of Yunnan have been studied by using conductance method and fractal geometry theory. For sand rock and breccia , the pH of solution in the process of dissolving increases and finally approaches 7, and pH increases slowly for the later because of the compaction of breccia . The conductivity of solution increases with the increase of time when the concentration of Pb 2+ is lower, whereas when the concentration of Pb 2+ is higher. In the process of adsorption ions in rock are entered in solution. Adsorption capacities ( Q ) of two rocks are bigger, and the Q of Pb 2+ in them obey Freundlich experiential formula. The process of adsorption is fractal like, and mean while the kinetics equation is derived.Ability of adsorption of sand rock is weakened while the temperature of the solution is increased.
ZHANG Pei yuan , LU Xiao xia , YAN Bo , WANG Tian gen
2000, 23(4):64-67. DOI: 10.11835/j.issn.1000-582X.2000.04.016
Abstract:讨论初应力场中Rayleigh波速的计算。这种情况下,Rayleigh波的传播就是迭加在预应力位形上的小变形运动。由于受初应力的影响,计算Rayleigh波速的公式变得复杂。用初应力 质的弹性模量后,波速方程成为简单的6次代数方程,其中5次项,3项次,1次项为零。数值结果说明了初应力对Rayleigh波速有显著的影响。
2000, 23(4):68-71. DOI: 10.11835/j.issn.1000-582X.2000.04.017
Abstract:Based on a lot of testing data from Xiluodu Hydropower power station and ertan hydropower staton,the parameters such as m and s of the Hoek Brown strength criterion are analyzed in this paper.It is found that m and s are a couple of variables with great corelativity.While the strength of rockbody is a constant,there is negative correlativity between m and s determined by the property and location of rockbody,it is suggested in the paper that the corelativity between m and s is very important parameter which can not be neglected.
YAN Bo , LIU Zhang fan , ZHANG Xiang wei
2000, 23(4):72. DOI: 10.11835/j.issn.1000-582X.2000.04.018
Abstract:Based on the fluid saturated biphasic porous media model deduced from mixture theory,a finite element formulation with u S u F p variables for dynamic response analysis is given out.This method overcomes the difficulty of choosing suitable penalty parameter in penalty finite element method,and the accuracy of pressure distribution obtained with the mixed finite element method is higher than the penalty finile element method.An iterative solution method is suggested to solve the system of equations whose coefficient matrices are non positive definite.It is concluded from patch test that the order of interpolation function for pressure variables must be higher than that of displacement variables of solid phase.
XIONG Lan , SUN Cai xin , LIAO Rui jin , HU Li na , LI Da qiang
2000, 23(4):76-79. DOI: 10.11835/j.issn.1000-582X.2000.04.019
Abstract:Recently, more and more scholars join in the mechanism research and wide applications of membrane electroporation phenomenon. This paper introduces the electroporation precondition which leads to the numbers of pores in the membrane increased rapidly. It elaborates the mechanism research of membrane electroporation from three areas:namely the change of electric and mechanical characteristic of membrane, change of membrane molecular structure and the influence to ability of transmembrane transport of particles and ions. Moreover, this paper introduces the current wide applications of membrane electroporation characteristic in biologic technology and clinical medicine, emphasizes the significance of the mechanism research of membrane electroporation and lays out its favorable applicable prospects.
SONG Guan bin , YU Wei qun , LONG Mian , WU Ze zhi , CAI Shao xi
2000, 23(4):80-82. DOI: 10.11835/j.issn.1000-582X.2000.04.020
Abstract:The proliferation and division of cells are the most basic reaction. The effects of this reaction are the fact that the cell cycle was been influenced. Normal cells will change into tumor cells when its cell cycle running out of control; on the other hand, it will become feeble and die when its cell cycle stopping. Methods of synchronization and detection with flow cytometer of rat hepatocellular carcinoma cell line (HTC) are established in our laboratory. The results show that: as HTC cell is in the logarithmic period, the synchronous 72.10% G 1 phase and 98.94% S phase cells are achieved through thymine 2 desoryriboside and cochicine sequential blockage method and double thymine 2 desoryriboside blockage method respectively. It is proved that those results ware stable and reliable.
FU Bian hong , ZHOU Xiao hua , XIONG Dong mei
2000, 23(4):83-85. DOI: 10.11835/j.issn.1000-582X.2000.04.021
Abstract:This paper introduces analysis of RP HPLC for amino acids,which uses OPA/MCE and FMOC derivatives with two fluorescence detectors.The system's error is removed through Internal Standard,i.e.HCYS,HSER,NVAL,TPRO.Meanwhile,the method' accuracy is determined by relative error of recoverity with all kinds of amino acid's ramification.The result shows:it is an ideal method for amino acids'analysis with better sensitivity,detection limits and recoverity,overcoming the limitation by single ramification & only one detector.In addition,it gets over influent of the peak of NH 3 to column.And the relative error of retentive time is <5% & experiment of recycling is >90%,which explains credibility of the method.
CHEN Wei gen , SUN Cai xin , LIAO Rui jin , DENG Wu jun
2000, 23(4):86-89. DOI: 10.11835/j.issn.1000-582X.2000.04.022
Abstract:Long time partial discharge is bad for transfomers inside insulation and now partial discharge monitoring is not satisfactory because of electromagnetic interference and noise interference .This is a new way via dissolved gases concentration analysis to find partial discharge and acconding to diagnosis system to confirm partial discharge level. A basic research has been carried out to discover the correspondence relationship between partial discharge level and dissolved gases concentration,some valuable laws are gained for the first time.
XIAO You qiang , YANG Shun chang , YU Yu
2000, 23(4):90-95. DOI: 10.11835/j.issn.1000-582X.2000.04.023
Abstract:The capacity,voltage,and length of modern electric power system are increasing ceaselessly.Synchronous generators will cause self excitation with the help of armature reaction,its stator current and voltage will increase.The self excitation conditions and the transient process are two aspects for studying self excitation.Now,self excitation conditions are mathematical formulas under certain postulate.The model of transient process of self excitation is linear.The conditions of self excitation are presented based on simulation,and the results of self excitation effected by the electromagnetic parameters of hydro generators operating extra high voltage long transmission line are simulated,based on a saturation model of hydro generators.The conclusions are very helpful for operation and design of hydro generators.
WU Kai gui , ZHOU Jia qi , YANG Zhi , DENG Ren ming , XIE Zhao li
2000, 23(4):96-98119. DOI: 10.11835/j.issn.1000-582X.2000.04.024
Abstract:The reliability is an important component part of research fields in power system. This paper presents an application of object oriented programming to develop reliability evaluation system of electric networks. A new approach to reliability evaluation and graph expression is proposed, and a computer aided decision making system of electric network reliability evaluation using Visual C++ 5.0 under Windows95 environment is developed. The system can provide reliability data for power system operation and plan, which is the foundation for operation and decision making. It has the characteristics of better expansibility, convenient usage, user friendly interfaces and so on.
HUANG Guang jie , WANG Ling yun
2000, 23(4):99-102. DOI: 10.11835/j.issn.1000-582X.2000.04.025
Abstract:采用正交法设计了2024铝合金的热处理工艺方案,按设计方案进行了热处理试验和力学性能测试,同时测了淬火C-曲线,并运用金相、透射电镜等手段研究了固溶温度、淬火水温影响2024铝合金力学性能的微观机制,找到了2024铝合金的最佳热处理工艺制度。结果表明:合金经500℃固溶10-30min,转移时间小于15s,25-75℃水温淬火,自然时效96h,析出大量的与基体共格的GP区和S″SH ,WGQQR
LI You rong , ZENG Dan ling , WU Shuang ying
2000, 23(4):103-105. DOI: 10.11835/j.issn.1000-582X.2000.04.026
Abstract:On the base of non equilibrium thermodynamic theory and phase equilibrium principle, the physical mechanism of surface water evaporation and vapor diffusion is analyzed in the convective drying of porous material, and the thermodynamic condition of convective drying process is established. A new driving potential of water evaporation and vapor diffusion is set up and the effect of the drying medium temperature and humidity on the driving potential is discussed.
2000, 23(4):106-109. DOI: 10.11835/j.issn.1000-582X.2000.04.027
Abstract:Based on the analysis of expert experience on generation system planning(GPS), the theory of knowledge based method is introduced into GPS to express the constraints of engineering(viz. Expert experience of engineering), and to discard abundant improper program during the earlier stage of GPS. In this situation, the difficulty degree of optimizing calculation in the later stage of GPS is lessened. And then, integrating expert system with production simulation in a method of GPS is proposed and is verified with an example. The results show that the method presented is effective.
ZHOU Zhuo hua , ZHANG Zhong yi
2000, 23(4):110-114. DOI: 10.11835/j.issn.1000-582X.2000.04.028
Abstract:To research the distortions of Chinese economy under a system of free markets, a computable general equilibrium model is constructed. And we will derive the model. The conclusions of the study are: (1) prices and resource allocation in the 1995 Chinese economy were substantially distorted; (2) labor was be overpaid and capital was underpaid in most non-agriculture sectors;(3) More the agricultural labor force would have been employed by the non-agricultural sectors had China been a market economy. (4) The elimination of these distortions would imply a significant improvement in allocation efficiency and a redistribution of income from labor to capital, from households to the state, and from urban households to rural households.
TU Yun hua , HUANG Xi yue , WANG Dong hui , HE Li qing , CHAI Yi , YI Zheng jun
2000, 23(4):120-122. DOI: 10.11835/j.issn.1000-582X.2000.04.030
Abstract:Research for expert system of tomato planting, it intents to set up a all around expert decision system combining agriculture knowledge, scientific research production and practical experience with computer technology. This system makes the best of the modern multimedia computer technology, which gathers words, sound and image .It provides visual, intuitive,scientific and convenient environment using. Moreover, it employs theories of Artificial Neural Network and Expert System, combines experience of experts in tomato's field and simulates agricultural experts to guide farmers to plant tomato.
HUANG Xi yue , CHAI yi , ZHOU xin , WANG Xian ju , HUANG Han min
2000, 23(4):123-126137. DOI: 10.11835/j.issn.1000-582X.2000.04.031
Abstract:This paper studies the problem of computer vision in the vehicle intelligent auxiliary driving system. An effective and real time method in highway to search and track obstacle is presented. Obstacle candidates are tracked and analyzed, false alarms generated by the object detector are recognized and rejected. It also supplies some valuable discussion on problems existing in its experiments.
FAN Xing hua , HUANG Xi yue , LIU Guang bo
2000, 23(4):127-132. DOI: 10.11835/j.issn.1000-582X.2000.04.032
Abstract:Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value.
2000, 23(4):133-137. DOI: 10.11835/j.issn.1000-582X.2000.04.033
Abstract:The development mode of MIS application program is transferring from C/S mode to B/S mode.The visualization of data will paly an important role in MIS application program.Many commercial data chart activex controls are used to realize the data chart,such as Microsoft activeX control MSCHRT20.OCX,but some important properties and methods of this control are disabled on WEB pages based on B/S mode.In practical application point of view,a universal chart generation method on web pages is presented in this paper.All kinds of complicated data chart such as statistical chart can be easily be processed to show on web pages by using this method.The detailed implementing steps are also given in this paper.
FU Yong , QIN Zheng , WU Zhong fu , LI Hua
2000, 23(4):138-141. DOI: 10.11835/j.issn.1000-582X.2000.04.034
Abstract:混合光纤/同轴电缆(HFC)网络由于原CATV接入的广谱性和可用传输带宽高达1GHz,使其成为仅次于光纤到户的数据接入方式。由于HFC网络的一些固有特性,决定了数据通信中的特殊要求。IEEE802.14是用于协调HFC网络的前端和用户站点间数据通信的协议,具体包括物理层上实现通信的方式和媒体接入控制层上通信规程的协调。深入研究802.14数据传输的MAC,对于开发出性能价格比优秀的前端控制器和用户
SUN Guan yun , XIA Zhi ning , YANG Yu shu
2000, 23(4):149-153. DOI: 10.11835/j.issn.1000-582X.2000.04.036
Abstract:A review about the techniques of injection in capillary electrophoresis with 31 references is presented. Advantages and shortage of the techniques which is based on the principles of hydrodynamics and electrokinetics are commented, especially the no discrimination electrokinetic injection which is expected to have an advance in the capillary electrophoresis in the future.
YAO Guo wen , LIU Zhan fang , ZHAN Xian yi
2000, 23(4):154-158. DOI: 10.11835/j.issn.1000-582X.2000.04.037
Abstract:对近十年来玻璃和陶瓷介质在极端冲击条件下的实验研究,破坏现象和物理模型进行了总结,重点分析了低于Hugoniot应弹性极限时玻璃介质中的玻破坏波现象和陶瓷听拉伸/压缩损伤过程,指出Rasorenov的表面微裂纹扩展和Clifton的相变机制在解释脆性材料破坏过程中的合理性及其不足之处,分析了Espinosa的微裂纹多面模型和Partom的自持续破坏波模型在模拟玻璃介质中的破坏波现象时存在的主要问题