供应链运作风险影响企业竞争能力的实证分析

以供应链运作风险为切入点,在现有文献研究的基础上,从供应风险、需求风险、制造风险和信息风险四个维度反映供应链运作风险,通过提出相关研究假设构建了供应链运作风险作用于企业竞争能力的关系模型。基于对国内制造企业的调研数据,对模型进行了验证。研究结果表明,供应链运作风险对企业的竞争能力产生了不同程度的影响。     

Continuous time modeling of panel data: SEM versus filter techniques

Although convincing arguments have been put forward for continuous-time modeling, its use in panel research is rare. In one approach, classical N  = 1 state-space modeling procedures are adapted for panel analysis to estimate the exact discrete model (EDM) by means of filter techniques. Based on earlier less satisfactory indirect methods, a more recent approach uses structural equation modeling (SEM) to get the maximum likelihood estimate of the EDM by the direct method. After an introduction into continuous-time state-space modeling for panel data and the EDM, a thorough comparison is made between the two distinct approaches with quite different histories by means of Monte Carlo simulation studies. The model used in the simulation studies is the damped linear oscillator with and without random subject effects.     

粘弹性方程Hermite型有限元方法的超收敛分析

运用一个具有各向异性特征的非常规Hermite型有限元，对粘弹性方程在各向异性网格下进行超逼近分析，得到相应的超收敛结果。     

Information internalisation and internationalisation—Evidence from Vietnamese firms

Previous research on internationalisation has mainly focused on the collection and use of information. In this article we examine the role of information internalisation in international business activities of Vietnamese firms. A theoretical model incorporating key antecedents and outcomes of information internalisation is developed. The antecedents are market orientation and learning orientation, and the outcomes are international orientation and foreign sales intensity. A survey of 144 Vietnamese internationalising firms was conducted to test the model in conjunction with its two competing models by means of a two-step approach to structural equation modelling. We found that both information internalisation has direct and indirect effects (mediated by international orientation) on foreign sales intensity. Further, market orientation and learning orientation underlie information internalisation. Implications for managers and directions for future research are also addressed.     

An empirical assessment of the EFQM Excellence Model: Evaluation as a TQM framework relative to the MBNQA Model

Total quality management (TQM) is an approach to management embracing both social and technical dimensions aimed at achieving excellent results, which needs to be put into practice through a specific framework. Nowadays, quality award models, such as the Malcolm Baldrige National Quality Award (MBNQA) and the European Foundation for Quality Management (EFQM) Excellence Model, are used as a guide to TQM implementation by a large number of organizations. Nevertheless, there is a paucity of empirical research confirming whether these models clearly reflect the main premises of TQM. The purpose of this paper is to analyze the extent to which the EFQM Excellence Model captures the main assumptions involved in the TQM concept, that is, the distinction between technical and social TQM issues, the holistic interpretation of TQM in the firm, and the causal linkage between TQM procedures and organizational performance.     

数论中的两个问题

讨论了数论中的一个不定方程z2 -2y2 =-1与开特兰猜想 ,得到了不定方程z2 -2y2 =-1的一切非负整数解 yk=rk+akzk=2rk+ak其中ak+2rk=(3 +2 2 ) k 以及开特兰猜想的一种特殊情况 :方程 (n+1 ) n-nn +1=1 (n >1 )仅有一解。     

Multi-Group Latent Variable Models for Varying Numbers of Items and Factors with Cross-National and Longitudinal Applications

Varying sets of items and constructs are a problem frequently encountered in cross-national and longitudinal studies in marketing. We discuss the use of multi-group latent variable models in this situation and describe a method that can be used to handle unequal sets of items and constructs across groups in such models. A simulation study based on cross-national marketing data from Belgium and Great Britain revealed that accurate estimates of differences between latent means can be obtained with this procedure with as few as two common items, although a fairly large sample size is required to obtain small standard errors of the estimates of latent mean differences. A substantive example involving a confirmatory factor model as well as a structural model is also provided, using longitudinal data concerning the quality image of a food product in the Netherlands.     

基于Logistic回归模型的山西省信息产业发展阶段研究

信息产业生命周期的研究对提高信息产业政策制定的科学性和增强信息产业发展战略前瞻性具有重要意义。利用Logistic回归模型研究信息产业发展阶段,表明目前山西省正处在信息产业发展的最好时机。     

一类奇异半线性抛物方程的非对称有限元方法

具有奇异系数的抛物方程是一类很重要的方程，但是求其精确解是很困难的。本文考虑一类奇异半线性抛物方程初、边值问题的非对称有限元方法，给出了全离散解的加权L2模的误差估计。     

Analyzing reciprocal relationships by means of the continuous-time autoregressive latent trajectory model

Over the past decades, several analytic tools have become available for the analysis of reciprocal relations in a non-experimental context using structural equation modeling (SEM). The autoregressive latent trajectory (ALT) model is a recently proposed model [BOLLEN and CURRAN Sociological Methods and Research (2004) Vol. 32, pp. 336–383; CURRAN and BOLLEN New Methods for the Analysis of Change (2001) American Psychological Association, Washington, DC], which captures features of both the autoregressive (AR) cross-lagged model and the latent trajectory (LT) model. The present article discusses strengths and weaknesses and demonstrates how several of the problems can be solved by a continuous-time version: the continuous-time autoregressive latent trajectory (CALT) model. Using SEM to estimate the exact discrete model (EDM), the EDM/SEM continuous-time procedure is applied to a CALT model of reciprocal relations between antisocial behavior and depressive symptoms.