Estimation of signal to noise ratio using mahalanobis distance

In this paper, we propose some alternative estimatiors to that given by C. G. Khatri and C. R. Rao (1985), for estimating Signal to Noise ratio. Using Pitman Nearness, Condition for prefering one estimator over the other is estabilished. It is shown numerically that estimators corresponding to Entropy loss function are better more oftern than those corresponding to Squared Error loss.     

基于有效预测区域的模糊数据关联

多目标多传感器跟踪系统由数据关联和目标状态估计两部分组成,数据关联是多目标跟踪系统研究的核心。数据关联和目标状态估计两部分既有一定的独立性又有密切的联系,而将两部分合理地结合对提高跟踪系统的性能是重要的。该文以跟踪目标的有效预测区域为依据,利用基于Mahalanobis距离的模糊均值聚类方法解决数据关联问题,在一定程度上将数据关联和目标状态估计两个不同的过程相结合,仿真计算说明了其有效性。     

关于n维单形宽度的一个结果

证明了关于ｎ维单形宽度的一个不等式，结果是Ｗ≤（ｓｉｎθ）１／２αｎ１ｎ＋１ｎ＋１ｉ＝１Ｒ２ｉ１／２．这一结果蕴含并推广了Ｓａｌｅｅ－Ａｌｅｘａｎｄｅｒ定理     

网络教学与教育技术学学科建设

教育是社会进步的标志,教育技术是教育过程中的重要环节。它包括的内容甚广,从材料、工具到系统和方法。随着科学技术的发展,网络教育代替了旧时代的传统教育,无论从内容和形式上都是受教育者接受教育的最好,最捷径的方式之一,但它也有待管理,在未来的网络教育中将发挥更大作用。     

Psychic distance, psychic distance paradox and behavioral economics: Modeling MNC entry behavior in foreign markets

Assuming that MNCs face a much more complex environment that local enterprizes, the paper begins by discussing what economist Beckerman called psychic distance. After a historical discussion of this concept, I also discuss what O’Gardy and Lane called psychic distance paradox. Then, I argue that these two concepts have a great deal of relevance beyond their original intent of international trade-they are also relevant to FDI and all other formas of international production and exchange. Next, I argue, as I have done in several previous papers, that behavioral economics has a great deal of relevance to FDI and international productive activity; I also argue that behavioral economics can be utilized to describe the concepts of psychic distance and psychic distance paradox. Then, I develop a behavioral economics-based model that can explain the concepts of psychic distance and psychic distance paradox, and their relevance to the modes of entry of MNCs in international markets. In doing so, I argue that FDI and MNC behavior in general need not be explained outside of economics, since, in contrast to neo-classical economics, behavioral economics is capable of capturing the complexities of global markets.     

基于Web的远程网络教学平台设计

文章针对网络教育发展的需要和国内远程网络教学平台的实际情况,对远程网络教学平台的设计思路及总体结构设计进行了研究与探讨,并介绍了远程网络教学平台的功能模块设计与开发设计采用的关键技术。     

网络远程学习中的低绩效现象及解决方案

在网络远程学习中，由于师生时空分离，学生面对大量的信息会出现无所适从、信息迷航现象，从而造成学习的低绩效。这既有来自学习者自身的原因，也有来自于学习资源和学习支持方面的原因，教育部门应通过培养学生主动学习习惯、改善教学设计、营造良好的人文环境三方面，来有效解决这一问题。     

Nonparametric tests of hypotheses for umbrella alternatives

The author proposes a general method for constructing nonparametric tests of hypotheses for umbrella alternatives. Such alternatives are relevant when the treatment effect changes in direction after reaching a peak. The author's class of tests is based on the ranks of the observations. His general approach consists of defining two sets of rankings: the first is induced by the alternative and the other by the data itself. His test statistic measures the distance between the two sets. The author determines the asymptotic distribution for some special cases of distances under both the null and the alternative hypothesis when the location of the peak is known or unknown. He shows the good power of his tests through a limited simulation study     

Ranking opportunity sets in the space of functionings

We develop a ranking of compact, convex and comprehensive opportunity sets defined in the evaluative space of individual functionings. We suppose the existence of a target, that is a multi-dimensional bliss point in terms of functionings. This leads us to define concepts such as essentiality and freedomin a novel way. As a main result, we give an axiomatic characterization of the ranking obtained by minimizing the Euclidean distance between each opportunity set and the target.     

基于模糊数学的人力资源岗位匹配度研究

目前我国要建立并完善科学的社会化的人才评价机制,迫切要求广大企事业单位用科学、透明、公正的方法评价人力资源与岗位的匹配程度。为此,在构建人力资源岗位匹配度相关指标体系的基础上,运用360度模糊综合评价模型对人力资源岗位匹配度进行定量研究,并借鉴期望观点和空间两点距离观点对评价结果进行综合分析,以实现上述目标。