基于混合智能算法的仓库有限容量下随机存贮模型

针对仓库容量有限条件下的随机存贮管理问题,通过找出商品在销售进货过程中会出现的全部可能,确定得到总损失最小的方法,然后以最优订货点作为决策变量并确定约束条件,建立优化决策模型。采用基于随机模拟的混合智能算法对该决策模型进行求解。对模型中的不确定函数进行随机模拟,使用由其产生的一组输入输出数据来训练神经网络对该不确定函数进行逼近,然后将该神经网络作为适应度函数嵌套于遗传算法中,最后应用遗传算法解得模型的最优解。通过计算机仿真得到所需要的最优方案。实验表明,文中提出的基于混合智能算法的仓库随机存贮模型,较好地解决了实际应用中的仓库容量有限的随机存贮问题,具有很强的普遍性和实用性。     

动态环境对ABC的挑战及与TOC整合管理模式的构建

本文从ABC这种管理思想的前提假设出发,分析了动态环境对ABC的挑战。在此基础上,提出了ABC与制约理论(ThetheoryofConstraint,sTOC)相结合的新型管理模式。并将这种整合模式应用于常见的生产决策,将决策结果与ABC进行比较,以说明整合模式的应用及其优越性。     

A preference foundation for constant loss aversion

Following prospect theory and in particular the concept of loss aversion, introduced by Kahneman and Tversky (1979), we consider decision making under risk in which the decision maker’s preferences depend on a reference outcome. An outcome below this reference outcome is regarded as resulting from a loss: a loss decreases the decision maker’s basic utility more than a comparable gain increases this utility. An elegant and simple way to model this phenomenon was proposed by Shalev (2002): the utility of an outcome below the reference outcome is obtained from the basic utility by subtracting a multiple of the loss in basic utility: this multiple, the loss aversion coefficient, is constant across different reference outcomes. We provide a preference foundation for this loss aversion model.     

Dynamic managerial capabilities: Scale development and validation

Studies on dynamic managerial capabilities still have a rather theoretical nature, and there is great difficulty in finding a valid, reliable instrument to measure this construct. The present study contributes to solving this problem: It aims to develop and validate a scale to measure dynamic managerial capabilities. In this investigation, we develop a scale for three factors related to dynamic managerial capabilities: human capital, managerial cognition (already described in the literature), and relationship networks. The prominent finding in this research is the factor that is referred to here as relationship networks.     

Nonlinear regression and curved exponential families. Improvement of the approximation to the asymptotic distribution

Inference in nonlinear models is usually based on the asymptotic normal distribution, based on linearizing the model. The accuracy of this approximation can in many cases be improved by a reparametrization. Systematic methods for doing this will be described. Sometimes a saddlepoint approximation can be used, and this offers several advantages compared to the asymptotic distribution and the Edgeworth expansion. The improved methods are unfortunately not commonly used. It will be discussed why this is so. The methods will be illustrated by a series of examples.     

企业自主创新与核心竞争力互动的螺旋上升模型

通过分析自主创新对核心竞争力的促进作用入手,建立了企业自主创新与核心竞争力互动的螺旋上升模型。运用该模型分析了自主创新与核心竞争力内在互动的机理,以及企业自主创新模式的跃进。     

《C语言程序设计》教学方法的探讨

《C语言程序设计》是大学计算机专业的一门基础课程,如何通过更好的教学方法提高这门课程的教学质量显得至关重要。文章通过结合自身教学经验,对《C语言程序设计》教学方法进行了探讨。     

Important considerations in using statistical procedures to control for nuisance variables in non-experimental studies

In this paper, it is argued that the effects of statistically controlling for confounding variables in non-experimental studies have received insufficient attention. One of the reasons for this inattention is likely because many researchers do not fully appreciate what a statistical control strategy entails and how the use of such a strategy can affect the hypotheses actually tested in a study. In order to address these issues, this article (a) considers what the use of statistical control entails computationally, (b) reviews studies in which researchers have focused on the unique variance added by a predictor in testing a hypothesis, and (c) shows how this practice is not always sufficient for understanding research results.     

On the expected length of the least squares coefficient vector

As a motivation for biased estimation procedures, it is often stated that the vector of the least squares estimator is too long on average. Some authors have given an invalid proof of this statement. In this note a proof is given and comments added to indicate how large is this average length.     

VE原理在营销策略中的应用

价值工程 (VE)是一种着重于功能分析 ,力求用最低的寿命成本可靠地实现必要功能的有组织的创造性活动 ,但是在过去 ,价值工程理论往往应用于产品的设计开发阶段 ,也就是主要在市场营销策略中的产品策略应用。本文重新从客户和厂商角度对营销过程进行价值工程分析 ,探讨了如何把价值工程原理应用到更广泛的营销组合策略整体以及改进营销组织中去 ,并以此提高企业的综合竞争能力。     

Training as a generator of employee capabilities

In the current global economic environment, companies aiming to obtain lasting competitive advantages must be aware of those abilities that differentiate the company from its competitors. In this sense, personnel training may stimulate the development of certain capabilities related to the company's human resources, which could support this differentiation and hence the desired competitive advantage. For this reason, we have considered as an aim of this work to analyse personnel training as a policy for the development of the organisation's human capital, and its influence on the impulse of three differentiating capabilities, namely the employees' knowledge or know-how, the generation of a collective mind and the organisational commitment of personnel. In this article, we shall first analyse from a theoretical point of view the influence of the company's training policies on the development of certain differentiating capabilities. Then, we shall empirically prove this theoretical relation within the framework of the different business units of a financial institution.     

装卸混合的软时间窗VRP问题混合算法研究

考虑了配送车辆在客户点会同时发生卸货和装货的情况,构建了装卸混合的软时间窗VRP模型,并通过遗传禁忌混合算法求解。通过实例说明,该混合遗传算法能很好地解决装卸货混合VRPTW问题,获得较好的优化效果。     

技工学校学籍管理系统

使用VB开发了学生学籍管理系统,对系统的开发及使用做了详细说明。     

Many Models at the Bank of England

In this article, Simon Wren-Lewis examines why the Bank of England considers not one but a range of models when forecasting and formulating policy. He argues this reflects not so much alternative macroeconomic schools of thought, but instead alternative approaches to the nature of models themselves. In the academic literature there is now a spectrum of model types, reflecting the relative importance given to either macroeconomic theory on the one hand or explaining past data on the other. The conventional econometric model attempts a rather uneasy compromise in the middle of this spectrum, and has become distinctly unfashionable within academic circles. Despite this, the Bank retains a conventional econometric model at the core of its forecasting and policy analysis. The article discusses this model, but it also asks why the Bank places this type of model at the core of its analysis when they are now hardly used in academic macroeconomics? The answer is that the conventional model still has a number of crucial advantages for policymakers. The danger is that, in the absence of academic work on models of this type, the Bank may not be able to continue to maintain the high standard of its core model.     

资本外逃的经济效应与应对政策选择研究

资本外逃是一个复杂的经济问题,是由多种原因造成的,并会给一国经济发展带来不可估量的风险和损失。基于此,论文梳理了资本外逃的研究现状,提出了资本外逃所产生的经济效应,在此基础上,提出了资本外逃的政策选择,为一国在治理资本外逃时提供了政策选择和借鉴。     

Current developments in productivity and efficiency measurement

This collection presents a cross-section of papers addressing new advances in the field of productivity and efficiency measurement. The specific topics covered in this volume focus on several major issues: productivity and efficiency measurement in the presence of undesirable outputs; new and alternative measures of productivity and efficiency; new econometric approaches designed to produce better estimates; and evaluation of different estimators and the statistical precision of those estimators. The hope is that this volume will serve as a well-rounded introduction to this field and as a useful guide of where the latest research in this field is heading.     

基于Web服务的仓库管理系统设计

本文以某企业的仓库管理系统的开发为背景，在分析了企业仓库管理现状的基础上，提出了该企业的仓库管理系统的设计方案。进而，描述了实现该系统的关键技术Web服务，并对其实现和收到的效果做了阐述。     

New Results for additive and multiplicative risk apportionment

We provide new characterizations of the preference for additive and multiplicative risk apportionment when risk ordering relies on stochastic dominance. We then point out a simple property of risk apportionment with additive risks: Quite generally, an observed preference for additive risk apportionment in a specific risk environment is preserved when the decision-maker is confronted to other risk situations, so long as the total order of stochastic dominance relationships among risk couples remains the same. The main objective of this paper is to check whether this simple property also holds for multiplicative risks environments. We explain why this is not the case in general, and then provide a set of conditions under which this property holds. We also show that it holds – and even more strongly – in the case of CRRA utility functions due to a particular feature of this family of utility functions.     

改进的非上市公司经济增加值计算模型

经济增加值不仅是一种财务指标,更是一种管理的进步。对经济增加值指标的良好的运用可以提高企业激励机制的效果。本文针对非上市公司EVA计算困难的实际情况提出了改进的EVA计算模型来解决非上市公司EVA难以计算的问题。     

Constructing a fuzzy Shewhart control chart for variables when uncertainty and randomness are combined

In this paper we introduce a fuzzy chart for variables which is used in situations when uncertainty and randomness are combined. It is showed that the Shewhart chart’s control limits must be adjusted in these situations. However, this chart is based on a fuzzy acceptance region and this method arises when a decision should be made by referring to the grade of a sample statistic belonging to the fuzzy acceptance region.