Geeta distribution and its properties

A new discrete distribution defined over all the positive integers and with the name of Geeta distribution is described. It is L-shaped like the logarithmic series distribution, Yule distribution and the discrete Pareto distribution but is far more versatile than them as it has two parameters. It belongs to the classes of location parameter distributions, modified power series distributions, Lagrange series distributions and exponential distributions. Its mean fi, variance a2 and two recurrence formulae for higher central moments are obtained. Convolution theorem and variations in the model with changes in the parameters have been considered. ML estimators, MVU estimators and estimators based of mean and variance and on mean and first frequency have been derived.     

Combined estimate of a location parameter

In this paper, we revisit the problem of combining estimates of location considered by Cohen (1976). Our results unify and strengthen the results of Cohen (1976), Bhattacharya (1981) and Akai (1982).     

Estimation of the location and scale parameters of the extreme value distmbution based on multiply type-II censored samples

In this paper, we consider the problem of estimating the location and scale parameters of an extreme value distribution based on multiply Type-II censored samples. We first describe the best linear unbiased estimators and the maximum likelihood estimators of these parameters. After observing that the best linear unbiased estimators need the construction of some tables for its coefficients and that the maximum likelihood estimators do not exist in an explicit algebraic form and hence need to be found by numerical methods, we develop approximate maximum likelihood estimators by appropriately approximating the likelihood equations. In addition to being simple explicit estimators, these estimators turn out to be nearly as efficient as the best linear unbiased estimators and the maximum likelihood estimators. Next, we derive the asymptotic variances and covariance of these estimators in terms of the first two single moments and the product moments of order statistics from the standard extreme value distribution. Finally, we present an example in order to illustrate all the methods of estimation of parameters discussed in this paper.     

Facility Location with Dynamic Distance Functions

Facility location problems have always been studied with theassumption that the edge lengths in the network are static anddo not change over time. The underlying network could be used to model a city street networkfor emergency facility location/hospitals, or an electronic network for locating information centers. In any case, it is clear that due to trafficcongestion the traversal time on links changes with time. Very often, we have estimates as to how the edge lengths change over time, and our objective is to choose a set of locations (vertices) ascenters, such that at every time instant each vertex has a center close to it (clearly, the center close to a vertex may change over time). We also provide approximation algorithms as well as hardness results forthe K-center problem under this model. This is the first comprehensive study regarding approximation algorithmsfor facility location for good time-invariant solutions.     

北京市配送中心的选址研究

运用聚类分析对北京市配送中心的选址问题进行研究，北京市应将配送中心的地理位置确定为：海淀四道口、丰台玉泉营、莱广营、楼梓庄、青年路、久敬庄、海淀清河、丰台五里店，这样不但减少了配送中心的个数，而且在满足需求、提高服务水平及节约成本等方面也更具合理性。     

小额信贷可持续发展面临的问题及对策分析

小额信贷引入我国已有近二十年了,对我国的扶贫攻坚计划起了重要的作用,但随着经济形势的变化,小额信贷面临一些新的问题。本文从小额信贷的产品设计、目标群体的定位、财务可持续以及面临的风险等四个方面出发,分析了其面临的可持续问题,并在此基础上提出了相关对策。     

中国古代农耕社会村落选址及其风水景观模式

风水是中国一门独特的文化和学说。它强调人与自然的和谐,其实质是追求理想的生存与发展环境。趋利避害是风水的普遍原则,中国传统乡土聚落立村选址、营宅造院都遵循着这一原则,审慎周密地考察、了解自然环境,利用和改造自然,创造良好的居住环境。因此传统村落中所体现的风水具有不可忽视的现实意义,研究其合理含义,能让风水思想在当代乡村转型期的村镇建设中发挥积极而有效的作用。     

武汉市承接东部沿海产业战略转移的对策研究

武汉市"十二五"规划发展目标中明确提出,武汉市要巩固中部中心城市的地位,努力建设国家中心城市。武汉作为中部崛起的重要战略支点,要紧紧依托工业、科教、区位、交通、物流、市场等方面的比较优势,优化发展环境、突出产业转移特色、加大引资力度、实现招商集约化、吸引人力资本、注重科技创新,积极承接东部沿海产业战略转移,进一步提升城市综合竞争能力,努力打造成国家中心城市。     

资产专用性对确权后农地流转的影响

农地确权后,农户对农地转出多持中立或否定的态度,这与产权明晰促进交易的产权理论大相径庭。文章探讨了资产专用性对确权后农地流转的作用机理,并运用吉林省9市1444个农户数据对其进行实证分析。结果表明：农地确权后,土地资产、农业资产、地理位置以及人力资本等专用性抑制农户转出农地,农业资产和人力资本专用性抑制农户提高农地租金,而社会资本专用性则分别存在促进作用;农业资产、地理位置以及人力资本等专用性抑制农户更长时间转出农地;农业资产专用性对转出农地须要签订合约具有抑制作用,而地理位置专用性则存在促进作用。     

论社区矫正中矫正地变更的若干问题

我国以社区矫正人员的居住地为矫正地。矫正地变更主要包括迁居型、暂离型、外出型三种类型。迁居型矫正地变更后,由新矫正地的社区矫正机构进行矫正;暂离型矫正地变更后,由现居住地矫正机构委托异地暂时居住地社区矫正机构进行矫正;外出型矫正地变更须由现矫正地社区矫正机构进行延伸矫正,并强化矫正措施。