基于人力资源管理的绩效评价方法选择及效用模型分析

分析了在人力资源管理过程中,建立绩效评价方法选择理论的必要性及其目前的研究现状,然后引入经济学上效用的概念,通过效用概念建立起绩效评价方法选择的模型,并运用实例分析了效用模型最优方法所必须满足的条件。     

Moral Economies in Science: From Ideal to Pragmatic

In the following pages we discuss three historical cases of moral economies in science: Drosophila genetics, late twentieth century American astronomy, and collaborations between American drug companies and medical scientists in the interwar years. An examination of the most striking differences and similarities between these examples, and the conflicts internal to them, reveals constitutive features of moral economies, and the ways in which they are formed, negotiated, and altered. We critically evaluate these three examples through the filters of rational choice, utility, and American pragmatism, using the latter to support the conclusion that there is no single vision of moral economies in science and no single theory—moral, political, social—that will explain them. These filters may not be the only means through which to evaluate the moral economies examined, but aspects of each appear prominent in all three cases. In addition, explanations for decisions are often given in the language of these theories, both at the macro (policy) level and at the local level of the moral economies we discuss. In light of such factors, the use of these frameworks seems justified. We begin with an attempt to define the nature of moral economies, then move to a consideration of scientific communities as moral communities operating within material and other constraints which we relate to wider questions of political economy and societal accountabilities.

具有线性消费模式的最优投资研究

本文研究线性消费模式的最优投资问题。不同于Merton问题中消费是内生决策变量,本文假设投资者单位时间内必须消费不少于一个固定数量的财富,因而投资者有可能最终破产。在两类不同投资目标下,通过求解模型相对应的HJB方程,都获得了最优投资策略及最优值函数的闭式解。结果表明,最大化终止时刻财富期望效用准则的最优投资策略与最小化破产概率准则的最优投资策略截然不同。     

基于竞价机制的网格资源分配方法

针对网格资源分配中的竞争问题,提出一种基于竞价机制的网格资源分配方法,并定义了参与方的效用函数,基于所提出的资源分配模型,设计出一种网格资源分配算法,从而使得整个资源的分配趋于合理,为解决网格资源分配问题提供了一种有效的途径。     

人民币汇率机制改革取向的论析

2005年7月,中国人民银行开始实行以市场供求为基础、参考一篮子货币进行调节、有管理的浮动汇率制度。本文结合中国经济发展的实际情况,论述了汇率机制改革前的汇率制度状况及弊端,并运用相关的理论对汇率机制改革的必要性和紧迫性进行论证分析。     

近代经世思潮与洋务思潮之比较

近代经世思潮和洋务思潮是中国近代史上两大重要社会思潮。比较两者,可以看出:近代经世思潮批判现实,倡言改革,振兴实学,而且关注夷情。洋务思潮继承和发展了近代经世思潮,提出了变局观、自强求富观和人才观,以更加理性和客观的眼光“开眼看世界”和“师夷长技”。近代经世思潮向洋务思潮的转换是中国近代社会文化思潮曲折前进发展的必然结果。     

论修辞策略的评价标准

修辞策略的评价标准,就是用来判别策略的成败得失和优劣高下的标准.能否正确认识、科学把握评价标准,标志着对修辞策略本质和规律的理解深度,以及驾驭、运用策略的水准,对修辞策略的理论建设和实际运用具有重要的意义.文章着重论述了修辞策略的三条评价标准:功利性标准、真实性标准、审美性标准.     

如何克服预科汉语教学中的逆反心理

逆反心理是大学预科汉语教学中的一种常见现象。它的形成原因是多方面的,本文就如何在大学预科汉语教学过程中克服学生的逆反心理、激发学生的学习动机提出相应的对策、建议。     

Applications of cascade multilevel inverters

Cascade multilevel inverters have been developed for electric utility applications. A cascade M-level inverter consists of (M-1)/2 H-bridges in which each bridge's dc voltage is supported by its own dc capacitor. The new inverter can: (1) generate almost sinusoidal waveform voltage while only switching one time per fundamental cycle; (2) dispense with multi-pulse inverters' transformers used in conventional utility interfaces and static var compensators; (3) enables direct parallel or series transformer-less connection to medium- and high-voltage power systems. In short, the cascade inverter is much more efficient and suitable for utility applications than traditional multi-pulse and pulse width modulation (PWM) inverters. The authors have experimentally demonstrated the superiority of the new inverter for power supply, (hybrid) electric vehicle (EV) motor drive, reactive power (var) and harmonic compensation. This paper summarizes the features, feasibility, and control schemes of the cascade inverter for utility applications including utility interface of renewable energy, voltage regulation, var compensation, and harmonic filtering in power systems. Analytical, simulated, and experimental results demonstrated the superiority of the new inverters.     

保险投资的最优投资比例研究

本通过分析传统保费投资研究的不足，利用保费收取与保险赔付间的时滞，对收取的保费进行投资，通过考虑承保风险对投资的影响，建立了承保风险的保险投资模型，并得出最优投资比例。这对保险人正确利用保费进行投资有重要的理论和实际意义。