供应链模型评价体系的研究——以推系统与拉系统的模拟为例

当今世界,如何使自己企业的供应链能够更有效率的运作,便成为了许多管理人员继续考虑的一个问题。基于此背景下,许多供应链的优化模型被理论界提出。针对传统的模型存在一些不足之处,通过采用系统模拟的方法,提出了一套新的评价系统,应用了权衡曲线的原理,并考察了在需求发生变化的情况下决策的适应情况,给出不同情景下的决策建议。     

基于公平理论的薪酬保密政策实施效果研究

亚当斯的公平理论为企业构建公平的企业文化提供了依据,但众多企业却片面的利用了参照对象的信息对员工公平感判断的影响,消极的采取“薪酬保密”政策,以减少员工因感觉不公而产生的消极行为。但是企业只能够从正式组织的层面进行信息的屏蔽,却无法实现对非正式组织“小道消息”的绝对杜绝。文章运用情景模拟实验的方法,来验证“薪酬保密”政策的实施效果,并以“信息公开程度“为依据,设立三组对照组,分别进行试验。通过实验,发现：企业应当主动的披露有关信息,与其被动的屏蔽,不如有效的引导。     

Statistical model for earthquake economic loss estimation using GDP and DPI: a case study from Iran

As earthquakes can result in multi-dimensional negative consequences such as human loss and building damage, the ability to make accurate economic loss estimations immediately after the occurrence is crucial. Unfortunately, in many earthquake-stricken countries such as Iran, governments are often unable to quickly or accurately assess post-earthquake losses. The aim of this paper, therefore, is to extend the model developed by Chan et al. (Nat Hazards 17:269–283, 1998) to two independent variables to develop an earthquake economic loss estimation method based on the economic and socio-economic indices gross domestic product (GDP) and disposable personal income (DPI) and a seismic hazard probability function. A global cell map is also considered to assess the GDP and DPI based on the population in each cell affected by the earthquake. In the final stage, using the Modified Mercalli Intensity Scale, 18 earthquake damaged areas in Iran are taken as case study to estimate the economic losses using the new model presented in this paper.

     

运用代理技术共享校园网络信息资源

学校每年都会投入大量的财力提供教学、科研相关的信息服务。但基于一些资源和信息的保密性,以及版权等问题,学校无法直接免费对外网用户提供服务。通过运用代理技术,可以为外网用户共享校园网络信息资源。     

Behavior patterns of investment strategies under Roy’s safety-first principle

The safety-first principle is a natural motivational factor in decision making, and is closely related to certain popular heuristics such as satisficing. We provide a systematic analysis of optimal portfolio choice under Roy’s safety-first principle by examining and comparing the behavior patterns of three popular investment strategies: the optimal constant-rebalanced portfolio, dynamic-rebalanced portfolio and buy-and-hold strategies. Our results indicate the importance of a match between the investment strategy, the investment goal, and the investment horizon. We also develop a geometric approach to investigate the relationships among the safety-first, expected utility, and mean-variance models and offer an explanation for the long-standing debate concerning different patterns of time-diversification effects.     

基于动态面板数据的操纵性应计盈余模型改进研究

利用操纵性应计盈余模型可以衡量上市公司操纵盈余的幅度。现有文献往往基于截面数据进行测度,由此得到的研究结果往往存在内生性和异质性问题。本文提出改进的基于动态面板数据的操纵性应计盈余模型,并通过对比改进模型与已有应计模型在犯两类错误中的概率,得到本文的研究结果：改进模型在两类错误检验中均优于其他模型,验证了该模型在中国资本市场的解释力,为投资者和监管机构更加准确地测度企业盈余管理幅度提供参考。     

Nonparametric transfer function models

In this paper a class of nonparametric transfer function models is proposed to model nonlinear relationships between ‘input’ and ‘output’ time series. The transfer function is smooth with unknown functional forms, and the noise is assumed to be a stationary autoregressive-moving average (ARMA) process. The nonparametric transfer function is estimated jointly with the ARMA parameters. By modeling the correlation in the noise, the transfer function can be estimated more efficiently. The parsimonious ARMA structure improves the estimation efficiency in finite samples. The asymptotic properties of the estimators are investigated. The finite-sample properties are illustrated through simulations and one empirical example.     

TRIZ真的是创新“点金术”吗——对浙江省TRIZ应用效果的分析

TRIZ在宣传中被誉为创新“点金术”,但在实际应用中却毁誉参半。为回答TRIZ是否真的能够“点石成金”,对TRIZ的适用性、工具效果和综合效益进行研究。基于浙江省148个TRIZ应用案例进行统计分析,研究发现：第一,TRIZ行业适用性广,能够实现多样化目标;第二,不同TRIZ工具效果差异较大,技术矛盾与40条发明原理是最有效的TRIZ工具,概念方案中有37.73%都与之相关,运用该工具平均每产生3.98个概念方案就会生成一个解决方案;第三,TRIZ工具的经济效益和知识效益比社会效益更显著。据此,工程师应根据问题和任务需求灵活选择TRIZ工具,对效率不高的TRIZ工具进行优化,重视和提高TRIZ的社会效益。     

计算机辅助设计在人工宝石琢型设计中的应用研究

文章主要介绍计算机辅助设计技术的相关概念,并结合具体实例论述其在人工宝石琢型设计中的应用。     

基于匈牙利算法的多车型配送问题

多车型车辆调度是一类高难度的运输决策工作,在编制合理的车辆使用方案过程中,要求以最低的费用完成运输工作量,实现经济效益最大化.不同种类的货物要求不同的运输车辆,通过对车辆需求特性及车辆参数的分析,建立了以最小总油耗量为目标函数的车辆调度模型,选用匈牙利算法对该模型求解,经过实际计算验证,结果切实可行.