计算机公共课教学改革实践探索

在科学技术高度发达的今天 ,为了使计算机公共课教学适应时代的发展 ,教师必须转变教育观念。同时 ,针对计算机教学自身的特点 ,教师应当运用变化的教学手段和灵活多样的教学方法来进行教学     

试论企业的环境成本管理

近年来随着人们环保意识的增强,企业对环境成本的管理日趋重视。本文从环境成本的内涵入手,阐述了环境成本的管理指导思想,并提出了环境成本管理的方法。     

Local polynomial estimation of Poisson intensities in the presence of reporting delays

Summary.  The system for monitoring suicides in Hong Kong has considerable delays in reporting as the cause of death needs to be determined by a coroner's investigation. However, timely estimates of suicide rates are desirable to assist in the formulation of public health policies. This motivated us to develop a non-parametric procedure to estimate the intensity function of a Poisson process in the presence of reporting delays. We give closed form estimators of the Poisson intensity and the delay distribution, conduct simulation studies to evaluate the method proposed and derive their asymptotic properties. The method proposed is applied to estimate the intensity of suicide in Hong Kong.     

世界教育信息化发展及其经验

教育信息化是战后教育发展的最重要发展方向之一。世界教育信息化的发展经历了发端、进一步推进和迅速高涨的发展时期;在每一个阶段各国推进教育信息化的政策、措施和特点等方面都呈现出一些独自的特征。总结世界各国推进教育信息化的经验对我国教育信息化的发展具有重要的启发意义。     

Sampling Returns for Realized Variance Calculations: Tick Time or Transaction Time?

This article introduces a new model for transaction prices in the presence of market microstructure noise in order to study the properties of the price process on two different time scales, namely, transaction time where prices are sampled with every transaction and tick time where prices are sampled with every price change. Both sampling schemes have been used in the literature on realized variance, but a formal investigation into their properties has been lacking. Our empirical and theoretical results indicate that the return dynamics in transaction time are very different from those in tick time and the choice of sampling scheme can therefore have an important impact on the properties of realized variance. For RV we find that tick time sampling is superior to transaction time sampling in terms of mean-squared-error, especially when the level of noise, number of ticks, or the arrival frequency of efficient price moves is low. Importantly, we show that while the microstructure noise may appear close to IID in transaction time, in tick time it is highly dependent. As a result, bias correction procedures that rely on the noise being independent, can fail in tick time and are better implemented in transaction time.     

西方企业战略更新研究

企业战略更新是21世纪战略管理学的重要主题之一。阅读大量文献后,发现西方学者从不同的角度研究战略更新问题。美国学者佛罗达等是从中层管理者的角度出发,认为中层管理者是探索战略更新的一个合适的切入点。荷兰学者沃伯达等从共同演进的视角思考了战略更新,认为战略更新是一个持续的过程,应该把环境的选择和管理的适应性相结合。荷兰学者温勒梅科等是从整合的视角探索战略更新的轨迹,他们的研究视野融入了三个维度:组织形式、管理者角色和时间维度。     

Bayesian analysis of elapsed times in continuous‐time Markov chains

The authors consider Bayesian analysis for continuous‐time Markov chain models based on a conditional reference prior. For such models, inference of the elapsed time between chain observations depends heavily on the rate of decay of the prior as the elapsed time increases. Moreover, improper priors on the elapsed time may lead to improper posterior distributions. In addition, an infinitesimal rate matrix also characterizes this class of models. Experts often have good prior knowledge about the parameters of this matrix. The authors show that the use of a proper prior for the rate matrix parameters together with the conditional reference prior for the elapsed time yields a proper posterior distribution. The authors also demonstrate that, when compared to analyses based on priors previously proposed in the literature, a Bayesian analysis on the elapsed time based on the conditional reference prior possesses better frequentist properties. The type of prior thus represents a better default prior choice for estimation software.     

论科技统计对高校发展的重要作用

科技统计是科学决策的基础，是组织架构设立和调整的依据，是科学制定和有效评价激励政策的前提，是贯彻“以人为本”管理思想的重要手段。对如何加强科技统计工作也提出了相关建议。     

基于趋势的区域物流规划的定位分析

本文分析了区域物流规划的定位现状及其基本原则，在此基础上分析了区域物流定位的影响因素及其变化趋势，利用AHP分析法来确定各因素的权重，提出了确定区域物流规划定位的数学模型，并用郑州市的相关数据做了实证分析。     

薪酬和绩效良性战略互动的探讨

从经济学、激励理论以及组织战略发展角度出发,分别分析薪酬和绩效之间的互动关系存在的客观根源(即等价关系的客观存在)和主观原因(即组织战略发展的需要)。同时通过对目前薪酬设计和绩效考核存在的脱离组织发展战略和员工个性需求等不科学、不合理现象并严重影响二者互动的因素进行了分析,最终从方法和理论角度详细讨论了如何防止二者脱节,如何使二者之间形成良性互动、达到和谐状态的途径。