改装汽车的平顺性试验分析

对若干种型号的改装汽车进行了平顺性实际测试。计算与分析,其内容包括悬挂系统部分固有频率与相对阻尼系数的测定,在确定激励下汽车振动试验和路面随即激励下的平顺性试验等。本文通过数据处理与分析,讨论了共性问题产生的原因,提出了改进措施。     

Monotone Iterative Technique for Duffie-Epstein Type Backward Stochastic Differential Equations

IntroductionRecently ,the interest for the backward stochastic dif-ferential equations (BSDEs) has beensteadily growing ,dueto the mathematical questions they posed,their relation toPDEs ,and applications to control and Finance .Pardoux and Peng1990[2]studied the following BSDEdriven by Brown motion:dy(t) =-f(t ,y(t) ,z(t))dt +z(t)dW(t)y( T) =Y(0)whereW(t)is Brown motion,(FtW)t≥0is the natural fil-tration of( Wt)t≥0. There are many results in the study ofthis type of BSDEs .Based …     

Forecasting non-normal time series

We look at the problem of forecasting time series which are not normally distributed. An overall approach is suggested which works both on simulated data and on real data sets. The idea is intuitively attractive and has the considerable advantage that it can readily be understood by non-specialists. Our approach is based on ARMA methodology and our models are estimated via a likelihood procedure which takes into account the non-normality of the data. We examine in some detail the circumstances in which taking explicit account of the nonnormality improves the forecasting process in a significant way. Results from several simulated and real series are included.     

特种泵性能试验台的设计

本文论述了特种泵试验台的设计要求和主要技术指标,提出了设计方案和主要设计参数以及试验台主要设备的设计计算。     

Buyer similarity measures in conjoint analysis: Some alternative proposals

In the commercial application of conjoint analysis, it is not unusual to compute pairwise similarity measures for buyers based on their commonality across part-worth utilities. The resulting similarity matrix may then be processed by various clustering techniques. This paper considers other ways to measure buyer similarity in conjoint analysis and compares the resulting measures to the traditional use of part-worth commonalities. An empirical example is used to illustrate the approaches and compare their results.The authors express their appreciation to Mr. Yong-Tai Tsai, of the University of Pennsylvania, who carried out the various computer computations reported in this paper.     

交易谈判中的数学方法

在假设交易谈判中讨价还价的过程无限进行的前提下,从数学的角度,讨论了谈判双方在进行每一次让步时,其让步幅度（或让步比率）所应满足的条件和要求。同时,也给出了买卖双方未来的报价的预测方法。     

大学生民族认知特征初探

本文引进凯利（Ｋｅｌｌｙ．ＧＡ）的角色建物贮存测验（ＲｏｌｅＣｏｎｓｔｒｕｃｔＰｅｐｅｒｔｏｒｙＴｅｓｔ）．并加以改进用于探讨大学生民族认知特征，初步研究结果认为大学生在民族认知方面存在认知面窄，认知分化少，且有认知定型存在．     

科技进步在交通运输中作用的定量测度方法研究

强调科技进步在交通运输企业中的重要作用，研究生产函数产生的前提条件，提出一个非线性生产函数，论述该非线性生产函数的合理性，给出一个计算科技进步的具体实例，并对计算的结果进行试算和分析。     

体操理论考试仿标准化命题的初步探讨

本文在统计分析体育系目前体操理论考试题的基础上,根据标准化命题的原则,考虑到体操理论考试的具体条件,提出了仿标准化命题的方法,为小规模考试的标准化问题提供参考。     

径向波箔轴承的设计计算和试验研究——(Ⅱ)几何参数计算和实验研究

本文根据大量试验结果,提出了径向波箔轴承几何参数的设计计算公式;介绍了高速轴承试验台的结构和试验方法(试验台的所有支承轴承和加载装置的活动联接全部采用气体润滑);对几种不同参数的皮箔轴承进行了初步的静态特性试验。试验结果与理论计算基本相符。