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981.
本文基于横向谐振法,利用併矢格林函数理论导出了一种简单,直接的方法,用以计算加载和不加载圆凹柱型腔的谐振频率和调谐特性.该方法费时少,精度高,因而将在毫米波电路的计算机辅助设计中得到广泛运用. 相似文献
982.
对于颗粒增强复合材料的研究,过去多注重于其复合后的弹性模量。本文以等大颗粒的最紧密堆积状态为对象,建立了接触点模型,推导出掺入异种颗粒后强度变化的规律,发现强度率F=R/R_(A-A)随掺入率P=A/B的变化与正态分布曲线有关,这样当已知混杂颗粒掺入率后,在复合前即可借助N(0,1)的分布函数预测其强度率, 相似文献
983.
Martin Seeleib-Kaiser 《Social Policy & Administration》1995,29(3):269-293
Both Japan and (West) Germany were subjected to foreign “Allied”Occupation from 1945. In this fiftieth anniversary year of the ending of World War Two and the commencement of these periods of Occupation, this paper assesses and compares the impact of the latter experience on social policy development in Germany and Japan. In particular, it focusses on social assistance and unemployment insurance, on the grounds that provision for “the able-bodied poor”constitutes a clear guide as to how far each society has progressed or is progressing along the road to “social citizenship”as defined by T. H. Marshall. The import of Allied Occupation was in practice quite different in the two cases, not least because of their very different paths of social policy development beforehand. Developments in the wake of Occupation and upto the present are nonetheless indicative of there being some elements of policy “convergence”, which welfare state regime theory has hitherto failed to allow for in its concentration upon “whole systems”at the expense of more detailed policy “subsystem”review. 相似文献
984.
魏静姝 《三峡大学学报(人文社会科学版)》2003,25(2):91-93
英汉词义不对应现象可由词汇缺项引起,造成词汇缺项的原因是英民族的抽象思维和汉民族的形象思维和具体思维以及两个民族之间社会文化背景的差异。该现象也可由词汇的引申义、派生义和蕴涵意义引起,这些意义产生的原因是汉民族的辩证思维和英民族的二项式逻辑思维以及英民族之间的文化差异。该现象还可由英语词组合中的词义空缺引起,造成这类词义空缺的原因是表达习惯或文化因素。 相似文献
985.
Though numerous Measures of coping have been presented in the literature, procedures used to evaluate the construct validiy of these measures are incomplete, and few studies have examined multiple measures using data from the same sample, This study presents a comparative evaluation of the construct validity of the Ways of Coping Checklist (WCCL; Lazarus and Folkman 1984) and the Cybernetic Coping Scale (CCS; Edwards 1991), based on confirmatory factor analyses of data from 116 MBA students. Results provided moderate support fot the CCS and weak suport fot the WCCL. Recommendations for the use of the WCCL and CCS are offered, and procedures for the development of coping measures are discussed. 相似文献
986.
987.
郭俊珍 《湛江师范学院学报》2003,24(6):28-32
导出了瞬态雷诺方程,利用油膜厚度和压力的Taylor级数的展开式,解出了各阶非线性油膜力的解析式以及相应的线性及非线性刚度和阻尼系数和刚度阻尼耦合系数,并对其进行了无量纲化.研究了油膜力的各阶相对误差.结果表明,随着油膜厚度的增加,油膜力的相对误差愈来愈大,说明了非线性的影响程度愈加突出. 相似文献
988.
雷卿 《三峡大学学报(人文社会科学版)》2003,25(2):86-88
本文结合我国英语教学实际,运用语境理论,论析语境对语言意义理解的影响,揭示语言交际环境中语义的理解依赖于语境以及语境对语义的影响与作用这一相互关系,从而培养学生在语境中有效使用语言和正确理解语言的能力。 相似文献
989.
Ashok Parikh 《Journal of Policy Modeling》1982,4(3):395-411
The interrelationships between production, consumption, and stocks are studied in an interdependent framework for two groups of agricultural commodities, namely foodgrains and nonfoodgrains, with a view to obtain policy guidelines for agricultural growth. The model is formulated with aggregate information over the period 1951–1975 and both static and dynamic simulation along with multiplier analysis are carried out to assess the performance of the model. The study reveals that if there had been no PL 480 aid from the U.S. imports, foodgrain prices would have been higher than observed prices. Ex-ante forecasts to 1985 suggest some need for adequate planning with regard to stockbuilding. 相似文献
990.
Hans-Werner Sinn 《Journal of Economic Psychology》1985,6(2):185-206
In this article specific hypotheses on the shape of a rational agent's risk preference function are derived from psychophysical laws. Weber's law is used to establish the hypothesis of constant relative risk aversion for a myopic expected-utility maximizer. Weber's law. Fechner's law and a modified version of Koopmans' preference functional are shown to generate a family of multiperiod preference functionals which are either of an additive logarithmic or a multiplicative Cobb-DougIas type. This family has very appealing implications in a world of stochastic constant returns to scale. For the actual decision the multiperiod optimizer exhibits constant relative risk aversion as does the myopic optimizer. However, with the passage of time. the degree of this risk aversion, in general, moves towards unity. Moreover, it is worth noting that the agent neither has to make the consumption decision simultaneously with the selection of an optimal risk project nor needs any information about the future except his or her own preferences. 相似文献