东北地区农业资源优化配置研究

东北地区农业资源在全国具有不可比拟的优势,然而也依然存在着与全国其他地区所共有的人多地少的约束.以种植大宗粮食作物为主、适宜大面积机械化耕种的东北黑土地来说,由于自然禀赋约束、土地制度约束、行政制度约束和市场约束等原因,并没有迅速地走向资源最优配置的农业发展方向.本文通过上述几个方面的研究,给出了优化配置东北地区农业资源的政策建议.     

Access在Office各组件中的交叉应用探索

从在Excel中导入Access表或数据和在Access表或数据中导入Excel表格两方面分析了Access在Excel中的交叉应用,同时从在Word中实现Access表或数据的打开和在Access中实现Word数据的打开两方面探讨了Access在Word中的交叉应用,并研究了Access数据与HTML文档的交叉应用,以期为Access在Office各组件中的交叉应用提供一些参考,以实现Access与Word、Excel以及HTML文档间的交叉应用,提高办公效率。     

Impact of conversion to Critical Access Hospital status on hospital efficiency

This study examines the impact of Critical Access Hospital (CAH) Program on hospital efficiency using a two-stage approach, where data envelopment analysis is used in the first stage to estimate cost, technical, and allocative efficiency scores of a sample of rural hospitals. Densities of efficiency scores of CAHs and prospectively paid rural hospitals are estimated and compared using a nonparametric kernel density estimator and a bootstrap-based test. In the second stage, efficiency scores are regressed on environmental variables using bootstrapped truncated regressions. Density analysis and results from bootstrapped truncated regressions show that CAHs are less cost and allocatively efficient compared to prospectively paid rural hospitals, without being less technically efficient. Relative to their pre-conversion selves, CAHs appear to be slightly less allocatively efficient, while they are slightly more technically efficient and no less cost efficient. Overall, our results suggest that the CAH Program may have decreased the allocative and cost efficiencies of those rural hospitals that converted to CAH status relative to prospectively paid rural hospitals, without significantly increasing their technical efficiency.     

A general equilibrium analysis of strategic arbitrage

We analyze a general equilibrium framework with Cournot arbitrageurs and with price-taking investors who are subjected to restricted participation constraints. Restricted participation may leave some arbitrage opportunities unexploited by investors.We show existence of Cournot–Walras equilibria with an endogenous number of arbitrageurs. The number of arbitrageurs is endogenous since they have to sink entry costs in order to arbitrage across the relevant markets. We characterize equilibria and analyze the effects on equilibrium prices and quantities of increased competition among arbitrageurs due to lower entry costs.     

基于IEEE802.11b的MAC层随机退避算法的实现技术研究

随着WLAN技术的快速发展与广泛应用,WLAN实现技术的分析与研究成了领域中的一个热门命题。文章通过对IEEE802.11b的媒体接入控制MAC层DCF载波监听机制实现技术的研究,重点论述了随机竞争信道访问方式的随机退避算法,实现了IEEE 802.11b无线局域网中的公平访问共享的无线网络资源。     

基于WEB技术的网络零件库开发

网络技术的发展与CAD技术协同设计已成为制造业发展的一个重要助力。ASP模式具有低成本、易操作、便于管理等优点,与CAD系统相结合构建零件库,可以有效的缩短零件工艺设计时间、降低设计成本,成为企业部门之间、各企业之间信息交流共享的平台。     

No Vehicle Means No Aid—A Paradigm Change for the Humanitarian Logistics Business Model

The growing interest in humanitarian logistics is witnessed by an increasing focus of researchers and practitioners on that topic. Transportation in particular is emphasized as key to disaster relief. Despite its relevance, it suffers from a number of drawbacks, creating inefficiencies and limited effectiveness of aid. This article describes a paradigm change for fleet management in humanitarian organizations based on access‐based consumption. It further evaluates a case study among small‐scale producers in rural India, showing their acceptance for sharing vehicles. The newly created business opportunities will increase income and contribute to poverty alleviation. Taking part in the proposed vehicle‐sharing system can release them from ownership responsibilities and increase vehicle utilization, as well as improve vehicle availability, increasing the speed of aid from the perspective of humanitarian organizations. This article highlights the applicability of business models relying on the idea of access‐based consumption to not‐yet‐considered research fields, especially the transfer to rural areas of developing countries. © 2015 Wiley Periodicals, Inc.     

基于耗散结构的高技术虚拟产业集群准入退出机制研究

高技术虚拟产业集群是网络经济时代下的新型组织模式,其准入退出机制通过约束成员的进入与退出来有效保障集群内环境。在分析高技术虚拟产业集群具备形成耗散结构条件的基础上,建立了高技术虚拟产业集群形成耗散结构的演化模型,设计了基于耗散结构的高技术虚拟产业集群准入退出机制,从而推动集群不断地从一个耗散结构跃升到新的耗散结构,促使集群稳步有序地成长。     

学生成绩管理系统设计

本学生成绩管理系统具有一定的针对性,整个设计过程基于《数据库原理》的相关理论,是一个理论结合实际的学生管理系统的雏形。     

发展权受限角度下永久基本农田划定中补偿价格的测算 ——以重庆市为例

国家对永久基本农田建立了严格的保护制度,各地也尝试构建耕地保护的补偿机制,但补偿价格的测算目前还没有比较科学的方法,多是结合当地财政状况和经验值进行估算.本文从土地发展权损失的角度,通过量化发展权受限的损失对永久基本农田保护补偿价格进行测算,为建立基本农田保护激励机制提供依据和支撑.