信息资源开发战略研究

本文研究了信息资源开发的良性运行机制构建与规则建设、民众的信息意识开发和信息技术素质提高途径以及信息资源开发的社会环境优化 ,并对安徽省信息资源开发建设提出了几点建议。     

浙北地区人才资源优化策略

目前浙北地区 (嘉兴、湖州两市 与周边先进地区相比 ,人才资源的现状仍令人堪忧。为此 ,浙北地区必须在人才工作中深化改革、扩大开放、注重开发、营造环境 ,与上海接轨 ,构筑人才高地 ,为本地经济和社会的未来发展奠定雄厚的人才基础。     

Natural selection and rational decision: two concepts of optimization

There are two different kinds of optimization: “selection” and “rationality” optimization. Selection optimization characterizes competition in human and nonhuman societies sharing the same market or niche. “Rationality optimization”, on the other hand, characterizes human and nonhuman decision making processes. The two kinds of optimization generate the same result: agents end up behaving efficiently. Nonetheless, we should not downplay the differences between the two kinds of optimization. Otherwise, we would fail to capture the role of rationality in the development of the organism and possibly its implication for evolution.

区域公共管理中的协调合作组织优化路径

随着区域一体化的深入发展,协调合作组织在区域公共管理中日益发挥着重要作用。但由于区域管理体制存在缺陷等原因,现行区域协调合作组织未能充分发挥作用。在对协调合作组织面临的困境及其成因进行分析的基础上,提出区域协调合作组织优化的主要路径。     

基于里程节约思想的配送扫描法的优化思路

本文首先概述了中小型配送中心常用的配送方法——扫描法,指出其技术上的限制和不足,从而引入里程节约思想对该方法进行改进。通过算例显示,改进后的结果比改进前明显优化。最后本文还探讨了改进思路存在的一些明显的问题及解决方法。     

ENHANCEMENT OF THE APPLICABILITY OF MARKOWITZ'S PORTFOLIO OPTIMIZATION BY UTILIZING RANDOM MATRIX THEORY

The traditional estimated return for the Markowitz mean-variance optimization has been demonstrated to seriously depart from its theoretic optimal return. We prove that this phenomenon is natural and the estimated optimal return is always       times larger than its theoretic counterpart, where       with  y  as the ratio of the dimension to sample size. Thereafter, we develop new bootstrap-corrected estimations for the optimal return and its asset allocation and prove that these bootstrap-corrected estimates are proportionally consistent with their theoretic counterparts. Our theoretical results are further confirmed by our simulations, which show that the essence of the portfolio analysis problem could be adequately captured by our proposed approach. This greatly enhances the practical uses of the Markowitz mean-variance optimization procedure.     

An empirical comparison of the efficacy of covariance-based and variance-based SEM

Variance-based SEM, also known under the term partial least squares (PLS) analysis, is an approach that has gained increasing interest among marketing researchers in recent years. During the last 25 years, more than 30 articles have been published in leading marketing journals that have applied this approach instead of the more traditional alternative of covariance-based SEM (CBSEM). However, although an analysis of these previous publications shows that there seems to be at least an implicit agreement about the factors that should drive the choice between PLS analysis and CBSEM, no research has until now empirically compared the performance of these approaches given a set of different conditions. Our study addresses this open question by conducting a large-scale Monte-Carlo simulation. We show that justifying the choice of PLS due to a lack of assumptions regarding indicator distribution and measurement scale is often inappropriate, as CBSEM proves extremely robust with respect to violations of its underlying distributional assumptions. Additionally, CBSEM clearly outperforms PLS in terms of parameter consistency and is preferable in terms of parameter accuracy as long as the sample size exceeds a certain threshold (250 observations). Nevertheless, PLS analysis should be preferred when the emphasis is on prediction and theory development, as the statistical power of PLS is always larger than or equal to that of CBSEM; already, 100 observations can be sufficient to achieve acceptable levels of statistical power given a certain quality of the measurement model.     

农业生产资料投入对粮食作物产出影响因素的相关验证分析

农业生产资料价格上涨,导致农民对农业生产的资源配置、作物结构以及投入结构进行调整,以优化生产成本,这将进一步影响相关粮食作物的产出。应用C—D生产函数的扩展形式,分析农业生产资料各投入要素变化,对粮食作物产出的影响程度。化肥施用量和农业劳动力数是影响粮食产出的两个主要因素,进而提出了推广科学施肥,提高化肥利用率、大力推广农业机械化技术的应用、加大国家对农业基础建设和科研开发与推广的投资力度等保障措施,来进一步促进粮食生产稳步增长。     

Joint pricing and design of urban highways with spatial and user group heterogeneity

This paper addresses the joint optimization of capacity investments and toll charges imposed on multi-group users in monopolistic private highways within general road networks. A game-theoretic formulation is provided that leads to a nonconvex bilevel program. The proposed modeling framework handles several complex issues raised in realistic applications, such as regulations on the levels of tolls and service, and the discrete nature of highway capacity, using a genetic optimization technique. Real-application results show the importance of considering the spatial heterogeneity of prices, and the tradeoff between investments and pricing strategies in regulated private highways.     

浅议电子商务专业的准职业环境实训

在传统的电子商务模拟实训中,由于脱离了市场和社会,使得学生重视交易的成功,忽视了交易的成本,培养的学生拥有了熟练的操作技能,但缺乏相应的市场意识。准职业环境实训将模拟实训和市场有机地结合起来,既加强了学生操作技能的训练,又增强了学生的商务意识,提高了学生的综合素质。