Abstract:On the base of proving the feasibility of serial and parallel methods on Data Col-lection and Transmission System of the first Industrial CT in our country,we selected a more ad-vanced method which is the serial method to design this system

Abstract:Numerical study is performed to analyse the influence of aspect ratio on the nat-ural convection of high Pr fluid in a cavity with five discrete heaters at the bottom and an isothermalheat snk at the top,The range of aspect ratio is from 0.082 to 0.333, Raw is 107 and Pr is 90.Inthe half of the eavity five independent flow cells seperated by zero stream lines can be observed atsmall aspect ratio,which gradually merge into a single flow when aspect ratio increases and finallybeeome a big cell at A = 0.333.The average nusselt number based on the cooling arca,Nuc,showsthe highest value at A=0.082.With the incrcase of A,Nuc decreases and arrives the lowest valuewhile A=0.138,then increases and reaches an extreme value as A=0.164.After that Nuc fluctu-ates with the variation of increasing rate of flow velocity.

Abstract:Equivalent couple stresses and non-symmetric equivalent stresses are introducedto describe the equivalent constitutive equation of honeycomb materials within plane deformation.Itis necessary for the materials of macroscopic polarity induced by some mesostructures.

Abstract:A new method was presented for power load forecasting.Based on the fuzzyclustering technique,the historical samples of power load and its relative environmental factors wereclassified into several typical categories,the fuzzy numbers and sets were then used to describe thepatterns of load variation and the features of the environmental factors for every class. Finally,byunderstanding the state of future environmental factors, the future power load can be predictedthrough determining the category of load variation pottern. The validity of the proposed method wasverified with a practical medium-term load forecasting.

Abstract:In this paper,the stability problems of coal and rock mass exerted by horizontaland vertical forces are studied with the help of the method of catastrophic theory. The expression ofthe total potential energy function for this system is derived. This system can be described by thecusp catastrophe model. The bifurcation set which makes this system to loss its stability in the hori-zontal and vertical force control space is obtained. At the same time ,the process of Sudden statechange of coal and rock due to the changes of horizontal and vertical forces is discussed.

Abstract:The geometrical properties of electromagnetic quantities are studied and the dif-ferential forms are introduced. It is shown that the differential forms are more suitable for describingelectromagnetic quantities.Finally , Maxwell's equations are presented in terms of differentialforms.

Abstract:This paper discusses design's ideas and technical characteristics of DAS off-linevibration Analysis system,which was developed by Automobile Department of Chongqing Universi-ty. The system uses Fast FIR multi-pass-band digital filter to calculate the filer values of resamplingsignals.It can make off-line analysis much more rapid and flexible,and the system was used inoff-line analysis of C5216A

Abstract:Heat transfer in the tube-mouth region of high temporature heat exchangeequipment was further analysed. The finite difference method(FDM)was employed for investigat-ing emphatically the effects of contact thermal resistance on heat transfer.Temperature distributionin the tube-mouth region with the different contact thermal resistance was found.The computation-al results were compared with that which were obtained with no contact thermal resistance,and thecorresponding heat transfer mechanism was fully analysed.

Abstract:给出了一个描述并行加工设备组生产调度问题的一般模型及两个启发式算法，对ＥＬＰＴ方法，另提供了一个误差分析结果，对极大消去法给出了个数值计算实例.

Abstract:A new method has been put forward to automatically adjust height of drum-typeshearer.The principle of this rnethod is that the boundary of coal and rock is recognized with thepressure changes resulting from the height adjustment of the oil cylinder exerted by the cutting forceswhile the shearer drum is cutting the pure coal seam and the rock.With the help of this the corre-spondent hydraulic serving system can be controlled to adjust the height of shearer drum automati-cally.In this paper, a mathematical model is established a nd experiments and researches have been al-so carried out.

Abstract:The main optimum parameters of laying dust for mine is introduced in this pa-per.The related parameters of laying dust with swirl,pulsed and ordinary water jet are analysed re-spectively at different water pressures.

Abstract:A kind of hydro-pneumatic suspension with high lateral stability was in treducedin this paper.Analysis were made to its vertical linear stiffness properties and laternal angular stiff-ness properties. On the basis of the analysis,the formulas of its design calculation and method werepresented here.

Abstract:将ＳＩＭＰＬＥ算法应用于冶金中的数值计算，采用Ｋ－ε双方程模型和雷诺方程数值计算了拉速１．３ｍ／ｍｉｎ条件下连铸结晶器内的三维湍流场。得出了与实测一致的流场特点，同时，得出了松驰因子的新经验值α＝０．２５及压力修正因子αｐ＝０．５。编译的计算程序，可用来计算任意有限空间的三维流场。

Abstract:In view of liquid steel flow in mould for C C alloy steel billets,the flow velocityof fluid in the different zones in the vicinity of vertical wall on condition of four hole nozzle hassystematically been measured by Laser Doppler Anemometre(LDA).At the same time,according tothe logarithmic wall law,logarithm ic wall law equations near by differen t wall zones and ex-periemental constan ts have been derived by regression method,The velocity distriution law near bywall in mould is obtained.

Abstract:In view of the process characteristics of thin slab casting with a vertical-arcmould and super thin submerged nozzles, the fluid flow laws in a mould and in scarch of reasonablesu bmerged nozzle patterns have been physieally simulated. The fluid flow states of several typiealnozzleS in moulds were studied through water model experimen ts. The shape and dimensions of asuitable submerged nozzle have heen optimized for industry trials.

Abstract:在水力学模型实验的基础上，对初选的喇叭形，直孔形和牛鼻子形水口进行了结晶器流场激光测试，定量地研究了结晶器内流体运动特征。

Abstract:采用刺激－响应法技术，对多流水方坯连铸中间罐内液体的混合与流动状态以及夹杂物排除规律进行了研究，测定了停留时间，分布函数和曲线以及温度分布。实验结果表明：对３流以上的多流连铸中间罐，选用梯形结构，其内设置适当的流股控制系统后，流体的混合与流动得到改善，各水口区流股特性趋于一致，中间罐内注流温度分布均匀，平均停留时间增长，夹杂上浮率大于９９．９８％。

Abstract:通过连铸水口接缝吸气原理的分析，建立了水口接缝吸气方程，且用该方程计算的吸气量与实验分析进行了对比。为了避免水口接缝吸入空气和简化保护浇注现场操作，提出了利用密封料密封水口接缝的保护方法。

Abstract:In this paper according to different cooling feafures in the secondary coolingzone,a two-dimensional mathematic model of heat transfer is developed,which is suitable for the op-eration of the casfer in Chongqin g Special Steel Plant,In the model, a finite difference method isadopted and different boundary conditions a different time-step is firstly used.Thus the model isof high precision with a shorter calculation time.The optimum secondary cooling system of the con-tinuous billet can be gained by aimulating and optimizing calculations using the model.

Abstract:In the study on finding a group of inital values for solving operator equation x=G(x)by the two-sided iterative method,some stronger conditions forG(x)have been demandedand some new parameters have to be introduced since 1978,But,as it will be proved in this paper,Itis unnecessary to use any new parameters and other stronger conditions to get a group of initial val-ues of two-sided iterative, as those initial values can be obtained by means of an auxiliary iterativebeginning with operator G(x)itself. The numerical example in this paper illustraves that the methodproposed in this paper is a general method.

Abstract:Studyin g the processin g tech n ology of mak in g holee by laser com plicated sur-face,and developing a CAD/CAM flexible manufacture system.

Abstract:The paper discusses some main factors of the mecha nism of smooth and pre-cracking blasting.The results of theoretical analyses show that the formation of directional cracks isrelated to the distan ce of holes.the quasi-static pressure and the strueture of rock mass. This paperalso studies the relation of len gth of crack and distance of holes.The initial cracks occur on the wallof holes instead of in the middle of two holes.

Abstract:The ex plosio n process a n d paramete rs in the blast of large iron a nd steel wastesare analysed by using the theory of fracture mechanice.A three-dimensional model is established us-ing pressurised cylinder with multiple semi-elliptical surface cracks.Reasons are given for the expla-nation that the dynamic fracture toughness for iron and steel is generally lower than the correspond-ing static value during the blast.The importance is emphasized of the critical duration time of the dy-namic stress intensity factor for crack extension.