TRUST REGION METHOD FOR UNCONSTRAINED OPTIMIZATION

A new trust region algorithm is proposed for solving unconstrained optimization problems. According to the quadratic approximate model of the original optimization problem,the trust region algorithm uses directions,a convex combination of the quasi-newton direction and the steepest descent direction. This algorithm with new strategy is analyzed and the global and local quadratic convergent theorems are proved. At last,the implementation and computational results of the algorithm are demonstrated.     

THE PERFORMANCE EVALUATION AND REALIZATION FOR UNCONSTRAINED OPTIMIZATION SOFTWARE

In this paper, we propose some basic concepts of the performance evaluation on testing unconstrained optimization software and furtherdesign a performance testing package-OPTEST-1, which is used to test optimization programs on three areas: systems of nonlinear equations, nonlinear least squares, and unconstrained minimization. We also describe criteria of the performance evaluation, system functions, and the approach of performing OPTEST-1.     

THE MECHANICAL MODEL ON IMPACT SYSTEM AND ITS PARAMETER IDENTIFICATION

A new mechanical model on impact system with non-linear element is presented and the practical method for measuring and identifying the parameters is also studied. The results of the experimental analysis and theoretical calculations are satistactory. And we hope to provide more acurate theorecical model for the study and design of impact dampers.     

AGGREGATION METHOD AND ITS APPLICATION IN SYSTEM DESIGN

A new aggregation method for order reduction of linear continuous or discrete systems is proposed in this paper. This method is easy for system design and it makes the structure of the controller and the state observer simple. It also reduces the computation of the system design.     

BOUNDARY ELEMENT METHOD FOR MULTI-BODY CONTACT PROBLEM AND ITS APPLICATION IN HUGE EXCAVATOR

A boundary integrate equation and its discrete technique for multi-body contact problem is carried out on basic equations of boundary element method and its fortran program is compiled. Using the method ,the press distribution on the roller plate of the huge excavator with capacity 16 m3 was calculated and a distroy stress analysis of caterpillar of the excavator was carried out.     

APPLICATION OF ARMA MODEL AND PARAMETER IDENTIFICATION TO SIMULATION OF PULSATING WIND

With the wide use of tall buildings,highrise structures,suspended structures and some other flexible structures,the analysis ofstructure responses under pulsating wind has been more and more valuedin the field of engineering.It is necessary to effectively give pulsatingwind records with certain stochastic characteristics for the analysis ofstructure responses under winds and the design of anti-vibration struc-tures.Using autoregressive moving average(ARMA)model and techoniqueof parameter identification,this paper studies the method to simulatingpulsating winds which are compatible with given factors(such as powerspectrum or other stochastic characteristics).The conclution shows thatit is an effective method.     

AN OPTIMIZATION METHOD FOR SOLVING THE BOUNDARY WALUE QUESTION OF DIFFERENTIAL EQUATIONS

This paper presents an optimization method for solving the boundary value question of a differential equation on the basis of the trial-and-error method and the optimization method. As compared with the differential method, this method has some advantages such as quiker velocity at count, higher precision(especially at the boundary points) and can be widely used.     

A PROCESSING METHOD FOR THE WEIGHT OF THE OBJECT IN THE FUZZY SOLVING METHOD FOR THE MULTI-OBJECTIVE OPTIMIZATION

A processing method for the weight of the object in the fuzzy solving method for the multiojectide optimization are presented. The methods are using different type of membership functions and using the same kind membership function adjusting the parameter. Some corresponding analysis and examples are discussed and the results show that the two methods are very effective.     

棉花高产优质高效益规范化栽培模式研究与应用

本项研究于1985～1989年在河南省6个试点进行。试验采用多因素旋转回归设计,根据全省各试点测得数据,经统计建模及模拟仿真,决选出棉花优质高产综合栽培措施优化方案,找出了高产棉田不同生育期的最佳结构指标、最佳产量结构及最佳成铃时、空分布。两年多点联合反馈试验,最高每亩皮棉产量97.68kg,增产幅度9.4～26.9％;经三年的生产示范,产生直接经济效益1.092亿元,社会效益2.6亿元。     

中温高湿储粮区绿色储粮技术优化集成应用实践

根据本地区生态区域特点和储粮实际情况,中央储备粮安陆直属库在试验仓内开展节能保水降温通风、仓房隔热、粮面压盖、自控排热换气、仓顶喷淋降温等多项绿色储粮技术措施,有效地控制了粮温,减少了储粮水分丢失,延缓了储粮品质陈化,抑制了虫霉的生长繁殖、达到绿色储粮的目的。     

AN ANALYSIS OF AXISYMMETRY SHELLS OF SUSPENSION CROSS SECTION BY A METHOD OF INTEGRAL EQUATION IN INITIAL PARAMETER FORM

In this paper,the axisymmetrical shells of suspension crosssection is studied by means of integral equation in initial parameter form.An example of the shells under uniformly distributed load is calculated.     

THE METHOD AND ITS APPLICATION FOR COUPLED ANALYSING PLASTIC DEFORMATION OF ROLLING WORKPIECE AND ELASTIC DEFORMATION OF ROLLS

A method for coupled analysing plastic deformation of rolling workpiece and elastic de'formaticn of rolls is developed. The interaction of plastic defo rmation of rolling workpice and elastic deformation of rolls is considered. The couple is formulated by setting up force equilibrium equation at the interface of the rolling workpiece and tne rolls. The plastic deformation of rolling workpiece is treated by the rigid plastic finite element method and the elastic deformation of rolls is treated by the boundary element method. The rolling presure, perunit. forward slip, neutral from angle obtained from coupled analysis are lower than those obta-ined rigid rolls. The results obtained from analysis show that the analytical accuracy can be heightened using the coupled ana-ytical methcd dveeloped for treatng rolling3proccss.     

THE CLASSIFICATION THEOREM OF THE STATES FOR AN IRREDUCIBLE APERIODIC MARKOV.CHAIN AND ITS APPLICATION ON CERTAIN QUEUEING PROCESS

A sufficient condition of the recurrence and a sufficient and ne- cessary condition of the transience for an irreducible and aperiodic Markvo chain are given in this paper. The theorem 4 and- theorem 5 proved by F, G. Foster [1] are just the particular cases of them. Finally, these results are applied to the embedded Markov chain associated with queueing process so as to resolve the problem of the state classification for M/G/1 queueing process with bulk service studied by Bailey [2].