Estimation of Distribution Functions Using Data from Different Environments

Suppose that when a unit operatesin a certain environment, its lifetime has distribution G,and when the unit operates in another environment, its lifetimehas a different distribution, say F. Moreover, supposethe unit is operated for a certain period of time in the firstenvironment and is then transferred to the second environment.Thus we observe a censored lifetime in the first environmentand a failure time of a ``used' unit in the second environment.We propose an EM algorithm approach for obtaining a self-consistentestimator of F. Moreover, suppose using observations from both environments.The case where failure times are subject to right censoring isconsidered as well. We also establish the maximum likelihoodestimator of F. Moreover, suppose when the unit is repairable. Applicationand simulation studies are presented to illustrate the methodsderived.     

试论高等教育“学、研、产”的关系

简论了教学、科研、生产三者的关系,认为三者相互依存、相互需求、相互促进、相互补充,同时指出高等教育是产学研结合组织基础中的中心主体。     

Martingale generalizations and preservation of martingale properties

This article investigates circumstances under which seven important martingale properties are preserved by the following six martingale generalizations: quasimartingales, amarts, martingales in the limit, games fairer with time, progressive martingales, and eventual martingales.     

党中央三代领导人思想政治工作思想的探讨

党中央三代领导人一贯重视思想政治工作,为思想政治工作确定了"生命线"的战略地位。他们提出了"实事求是"的思想政治工作的思想路线;确立了"关心工作对象"的思想政治工作的重要原则;注重提高思想政治工作队伍素质,为思想政治工作奠定了坚定的组织基础;从而使我党的思想政治工作在贯彻落实党的路线、方针、政策和实现党的领导中发挥了重要作用。     

Prospect Theory and Limit Lines

Risk acceptance criteria in the form of limit lines are investigated in the context of prospect theory. This theory departs from utility theory in several respects, an important one being the use of weights other than probabilities in the evaluation of the expected impact of uncertain outcomes. Hypothetical functions reflecting certain attitudes toward consequences and rare events are developed and combined to produce several limit lines.     

On rates of convergence to infinitely divisible laws for dependent random variables

Large O and small o approximations of the expected value of a class of functions (modified K-functional and Lipschitz class) of the normalized partial sums of dependent random variables by the expectation of the corresponding functions of infinitely divisible random variables have been established. As a special case, we have obtained rates of convergence to the Stable Limit Laws and to the Weak Laws of Large Numbers. The technique used is the conditional version of the operator method of Trotter and the Taylor expansion.     

论哲学范畴与思维方式的内在关系--兼论"效益"范畴与当代思维方式

哲学范畴与思维方式之间存在着内在的联系,一个时代的思维方式就是由当时的哲学范畴结成的"网",范畴的特点决定和体现着思维方式的特点,范畴系统的演变决定和体现着思维方式的变革.优化哲学范畴系统对优化思维方式具有重要意义.     

试论推进中心商务区(CBD)改造与建设的价值取向

推进中心商务区(CBD)改造与建设是当今世界国际大都市、区域中心城市功能转变的必然要求。从20世纪90年代以后,我国特大城市区域中心城市纷纷在原有基础上改造或者选择新址规划建设中心商务区,凸显现代性、国际性、功能复合性、交通规划的超前性等规划价值取向。文章在考察国内外经验的基础上,明确提出忽视城市历史文脉的保护、不珍惜民力、一哄而上、资源超强度利用、重复建设,将是对CBD改造建设价值取向的扭曲。最后讨论了建设"大大连"与中心商务区的定位和优先选择。     

设立中央政府投资基金 建立国土整治基地

中国西部地区尤其是大西北是我国三大经济带中经济发展相对落后的地域,由于历史和众多因素的制约,决定了开发西部是一项规模宏大、影响长远的系统工程,正基于此,各种开发方案的设计必须立足于这一区情.因此,设立中央政府投资基金,建立国土整治基地是非常必要,也是切实可行的.     

股票市场的有限套利：一个行为金融模型

从行为金融的角度,结合有限套利与非理性个体对股票市场的套利者收益、资产价格特征进行考察。通过引入趋势交易者,发展了有限套利模型,并得到了套利者期望收益和市场波动性的解析解。然后对较宽范围内参数的可能取值进行了模拟。结果发现,套利收益同套利者能力和个体交易者的非理性程度有明显的非线性关系,在一定的条件下,套利者不但无法稳定市场,反而会促进资产价格的波动。