旅游价值链系统管理与旅游可持续发展关系的实证研究

以150份旅游企业员工调查问卷为研究对象,利用SPSS进行描述性统计分析、因素分析、相关分析和多元回归分析.结果表明:旅游价值链系统管理是由供应链策略、价值链战略、价值提供物3个因素构成的,旅游可持续发展是由居民生活、旅游经历、环境质量、公平发展、生态意识5个因素构成的;旅游价值链系统管理的内在构成对旅游可持续发展的3个目标(即环境质量、公平发展、旅游经历)都有显著的正向影响,对居民生活、生态意识的影响不显著.     

Three-factor symmetrical balanced designs with full efficiency for main effects

Some methods for constructing balanced design for 3-factor symmetrical factorial experiments in which all the main effects are completely unconfounded by using balanced arrays and BIB designs are proposed. The method is flexible in terms of selecting block size.     

Scheffés mixed model for multivariate repeated measures:a relative efficiency evaluation

Scheffé’s mixed model, generalized for application to multivariate repeated measures, is known as the multivariate mixed model (MMM). The primary advantages the MMM are (1) the minimum sample size required to conduct an analysis is smaller than for competing procedures and (2) for certain covariance structures, the MMM analysis is more powerful than its competitors. The primary disadvantage is that the MMM makes a very restrictive covariance assumption; namely multivariate sphericity. This paper shows, first, that even minor departures from multivariate sphericity inflate the size of MMM based tests. Accordingly, MMM analyses, as computed in release 4.0 of SPSS MANOVA (SPSS Inc., 1990), can not be recommended unless it is known that multivariate sphericity is satisfied. Second, it is shown that a new Box-type (Box, 1954) Δ-corrected MMM test adequately controls test size unless departure from multivariate sphericity is severe or the covariance matrix departs substantially from a multiplicative-Kronecker structure. Third, power functions of adjusted MMM tests for selected covariance and noncentrality structures are compared to those of doubly multivariate methods that do not require multivariate sphericity. Based on relative efficiency evaluations, the adjusted MMM analyses described in this paper can be recommended only when sample sizes are very small or there is reason to believe that multivariate sphericity is nearly satisfied. Neither the e-adjusted analysis suggested in the SPSS MANOVA output (release 4.0) nor the adjusted analysis suggested by Boik (1988) can be recommended at all.     

从“权力再制”到“文化再制”：教育实践中的符码逻辑——伯恩斯坦符码理论框架下的教育不平等问题

本着“符码是文化再制的内在机制”而非“外在权力关系的转播站”的观点，伯恩斯坦建构了一个新的分析工具——“符码”来探讨西方教育不平等的深层逻辑。他认为西方学校教育并不能有效推动社会阶层流动及改善个人地位的主要原因是：西方学校教育是社会阶级再制的工具，优势阶级通过“符码权力”进行控制，造成劳工阶级孩子在学校中处于不利位置的事实。为了实现教育符码相对“自主性”，教育系统应在符码控制领域提供及再制批判的资源，当教育再脉络化领域具有某种程度自主性时，其产生的论述能够阻碍官方符码教育论述的支配程度，市民社会的兴起在实现“自主性”方面也值得期待。     

一类具p-Laplace算子边值问题解的存在性

研究一类具P—Laplace算子的微分方程四点边值问题解的存在性。通过一个形式参数，将该问题间接地转化为一个等价的积分算子不动点问题。在非线性项有界、无界以及局部有界条件下，利用Schauder不动点定理分别得到了边值问题解存在的充分条件。     

The Complete Gradient Clustering Algorithm: properties in practical applications

The aim of this paper is to present a Complete Gradient Clustering Algorithm, its applicational aspects and properties, as well as to illustrate them with specific practical problems from the subject of bioinformatics (the categorization of grains for seed production), management (the design of a marketing support strategy for a mobile phone operator) and engineering (the synthesis of a fuzzy controller). The main property of the Complete Gradient Clustering Algorithm is that it does not require strict assumptions regarding the desired number of clusters, which allows to better suit its obtained number to a real data structure. In the basic version it is possible to provide a complete set of procedures for defining the values of all functions and parameters relying on the optimization criterions. It is also possible to point out parameters, the potential change which implies influence on the size of the number of clusters (while still not giving an exact number) and the proportion between their numbers in dense and sparse areas of data elements. Moreover, the Complete Gradient Clustering Algorithm can be used to identify and possibly eliminate atypical elements (outliers). These properties proved to be very useful in the presented applications and may also be functional in many other practical problems.     

考茨基和卢森堡对伯恩施坦"适应论"批驳的比较研究

伯恩施坦以资本主义"经济发展中的新材料"为借口,声称垄断组织和信用制度一样可以调节生产和流通,消除经济危机的产生;中小企业的广泛存在,以及它们表现出的"适应性"和"顽强性",完全有能力和大企业竞争、并存等言论,遭到了考茨基、卢森堡等马克思主义理论家的批驳.考茨基和卢森堡对伯恩施坦资本主义"适应论"的批驳有相同的视角,但态度、方法和侧重点却有差别,这对采取什么样的态度和原则去对待马克思主义以及对研究当代资本主义新现象、新趋势都是很有启示意义的.     

电信运营商业务投资的优化模型

提出了电信运营商业务投资的数学优化模型，再以X省运营商在业务投资方面的额度限制为例描述了四个约束条件，并给出求解方法。这种优化模型对电信运营商在实际投资中有较大的参考意义。     

Fuzzy multi-attribute decision-making for evaluating manufacturing flexibility

Evaluation of manufacturing flexibility in operations management is important to determine the competitiveness of manufacturing system, and is being increasing discussed in the literature on manufacturing system. The objective of this research is to develop a multi-attribute decision-making model based on fuzzy set theory to improving the manufacturing flexibility evaluation process. Since most information available in this stage is not numerical, fuzzy linguistic assessment is used to represent the performance rating of all flexibility metrics under flexibility dimensions and importance grade of all flexibility dimensions. This paper proposes a modified LOWA operator, which uses the maximum entropy weights, and uses it to direct computation on linguistic terms. The developed model evaluates the degree of manufacturing flexibility that can assist decision-makers, when making capital investment decisions and measuring performance, in finding the need for improving manufacturing flexibility, and in determining the dimensions of flexibility as the best directions to improvement. Examples using a case study of leading Taiwan firm in the bicycle industry are used to illustrate the concept developed. In addition, sensitivity analysis can be performed to examine the solution reasonability.     

基于不确定语言变量的风险投资项目群体评价方法的研究

在风险投资运作过程中,对项目的风险评估是其关键环节.由于影响风险评估项目的因素具有不确定性,本文引入不确定语言变量的运算法则.先使用不确定语言加权平均算子对信息进行集结,针对属性权重完全未知的情形,给出一个求解权重的方法;再通过不确定语言加权平均(ULWA)算子,对不确定语言决策信息进行加权集成,利用已有的可能度矩阵排序公式得到决策方案的排序;最后给出实例分析,以说明该方法的有效性和可操作性.