固定资产的折旧问题研究

通过对企业固定资产折旧问题的剖析,分析研究了固定资产折旧问题的本质要素,提出了评估固定资产的科学性.     

小波变换思想及其在信号处理中的应用

从傅里叶变换、短时傅里叶变换到小波变换的思想发展过程中分析了小波变换发展的必然性和重要性,并通过MATLAB仿真工具比较了三种变换在信号处理中的应用。实验结果表明,小波变换无论是对信号的时间定位还是对信号的频率定位都优于傅里叶变换和短时傅里叶变换。     

Identifying Dispersion Effects in Robust Design Experiments—Issues and Improvements

The two experimental methods most commonly used for reducing the effect of noise factors on a response of interest Y aim either to estimate a model of the variability (V(Y), or an associated function), that is transmitted by the noise factors, or to estimate a model of the ratio between the response (Y) and all the control and noise factors involved therein. Both methods aim to determine which control factor conditions minimise the noise factors' effect on the response of interest, and a series of analytical guidelines are established to reach this end. Product array designs allow robustness problems to be solved in both ways, but require a large number of experiments. Thus, practitioners tend to choose more economical designs that only allow them to model the surface response for Y. The general assumption is that both methods would lead to similar conclusions. In this article we present a case that utilises a design based on a product design and for which the conclusions yielded by the two analytical methods are quite different. This example casts doubt on the guidelines that experimental practice follows when using either of the two methods. Based on this example, we show the causes behind these discrepancies and we propose a number of guidelines to help researchers in the design and interpretation of robustness problems when using either of the two methods.     

论跨文化传播背景下世界商业文化传播

在世界商业文化跨地区、跨国度的传播历程中,商人是传播主体,商业精神是文化传播的灵魂,商业繁荣则是其文化传播诸多成果的外在表现.商人是社会财富的创造者,也是文明进步的推进者,中外商人所推崇的商业理论及商业信条,并由此而凝聚成的商业精神,是人类精神文化产品的重要组成部分,商业繁荣是社会稳定与民众生活水平显著提高的重要标志.世界范围内商业文化的有效传播,是推动社会和谐发展与文明进步的重要力量.     

论我国改制企业治理结构的现状与完善

目前,我国对国有企业实行公司化改制,应建立起一种理性的公司法人治理结构.但我国国有企业公司化改制后,由于持股比例失衡,导致公司法人治理结构的变形,股东会设置形式化,董事会的权力由集中走向集权,经理机构的权力过大,监事会的监督作用未能充分发挥,影响了公司法人治理结构的正常运转.当前,应从合理配置与制约现有的公司内部权力资源出发,科学地构建改制企业的内部治理结构.     

大学生就业的结构性矛盾分析

大学生就业问题是一个社会问题，当前大学生就业不仅是供过于求的问题，还有结构性问题及岗位的供给相对不足问题。解决大学生就业矛盾，首先必须解决劳动力技能培养与社会需求不匹配之间的矛盾。     

Structural Nested Models and Standard Software: A Mathematical Foundation through Partial Likelihood

Abstract.  In observational studies treatment may be adapted to the patient's state during the course of time. These covariates may in turn also react on the treatment under study, and so on. This makes it hard to distinguish between treatment effect and selection bias. Structural nested models aim at estimating treatment effect in such complicated situations, even when treatment may change at any time. We show that structural nested models can often be calculated with standard software, by using standard models to predict treatment as a tool to estimate treatment effect. Robins ( Survival analysis, Volume 6 of Encyclopedia of Biostatistics , John Wiley and Sons, Chichester, 1998) conjectured this, but so far it was unproven. We use a partial likelihood approach to choose the estimators and tests as a subclass of the estimators and tests in Lok (math. ST/0410271 at http://arXiv.org , 2004). We show that this is the class of estimators and tests that can be calculated with standard software. The estimators are consistent and asymptotically normal, and have interesting asymptotic properties.     

模糊Borda法的缺陷分析及其改进思路

 通过对模糊Borda法的分析，笔者认为该方法在技术处理上偏离了评价的基本思想，根本无法实现将评价值和评价序相结合的初衷。为了实现将两者相结合的目的，本文提出了两个解决思路：利用被评价单位在评价值的差距计算相对位次；或计算名次转换值与评价值的交叉乘积。     

石板坡大桥钢箱梁车载作用下局部应力分析

石板坡大桥主跨由钢箱梁与预应力混凝土箱梁组成。针对该桥钢箱梁桥面板局部受力复杂的情况，运用ANSYS软件建立了钢箱梁结构分析的空间有限元模型，分析了钢箱梁在车载作用下局部应力的分布特点。     

物理演示实验的优化设计及改进

提出了优化物理演示实验的设计原则和改进物理演示实验的检核表法，为物理演示实验的设计和改进提供指导．