An Estimation for the Power-Law Distribution Parameter Based on Entropy

A new estimation based on the Shannon entropy for the power-law distribution parameter is presented, The maximum likelihood estimation （MLE） of the parameter is discussed and the relation between the MLE and the moment estimation of the parameter is given out. It is shown that the minimum Shannon entropy estimation is equivalent to the MLE giving the log expectation.     

退耕还林中地区利益分配问题

从科斯定理入手，利用“流域发展权”概念和博弈论基本原理，分析当前退耕还林中的地区利益分配问题．认为退耕还林成本应该更多的由流域的中下游地区(主要指东部地区)承担，而不是如目前，实际上主要由中上游地区(主要指中西部地区)承担。     

Pregelation Behaviour of Coagulation Processes with the Constant-Reaction-Number Kernel

We propose an irreversible binary coagulation model with a constant-reaction-number kernel, in which, among all the possible binary coagulation reactions, only p reactions are permitted to take place at every time. By means of the generalized rate equation we investigate the kinetic behaviour of the system with the reaction rate kernel K（i;j） = （ij）^w （0 ≤w〈1/2）, at which an i-mer and a j-mer coagulate together to form a large one. It is found that for such a system there always exists a gelation transition at a finte time to, which is in contrast to the ordinary binary coagulation with the same rate kernel. Moreover, the pre-gelation behaviour of the cluster size distribution near the gelation point falls in a scaling regime and the typical cluster size grows as （to - t）-1/（1-2w）. On the other hand, our model can also provide some predictions for the evolution of the cluster distribution in multicomponent complex networks.     

学习毛泽东财政思想克服当前的财政困难——纪念毛泽东同志诞辰100周年

今年是毛泽东同志诞辰100周年。重新认真学习毛泽东财政思想，对于我们克服当前的财政困难，进一步明确我国财政工作的指导思想，深化财政分配制度改革，具有重要的现实意义。     

Reliability of Reinforced Concrete Buildings During Constructio

The safety analysis of reinforced concrete buildings during construction should be based on the comprehensive understanding of loads, load effects, structural resistance, and available safety index of the structure. This paper analyzes the characteristics and probabilistic models of resistance, loads, and load effects. A method was developed to calculate the probability of failure based on Monte Carlo simulation and models proposed in previous articles. Construction examples were used to analyze the influence of live load on the probability of failure. The results show that when the live load increases, the maximum probability of failure increases with acceleration. The results suggest that the construction live load should be carefully addressed during construction.     

吉尼系数逐步扩大的原因分析

我国吉尼系数偏大反映了我国收入分配领域的问题与矛盾，也带有我国经济发展过程中种种不和谐的烙印。目前吉尼系数已超过国际公认的警戒线，收入差距的扩大打破了原有的大锅饭、平均主义，带来了劳动生产率的提高。但收入差距的扩大也带来了种种问题，不利于改革的深入发展和社会的稳定。     

浅海地壳热流测量方法初探

根据１９８９－１９９１年，中国科学院海洋所与日本东京大学等单位合作在东海陆架地区进行了三个航次的海底热流调查资料，对浅海热流测量作业方法和资料处理技术进行探讨。