关于族群关系、民族关系与社会关系的关系

"族群"与"民族"概念上存在着交叉关联.族群关系、民族关系都是一种社会关系,但社会关系不一定都构成民族关系,民族关系有时也不一定能够准确地表述特殊的社会关系,族群关系却可以化解民族关系表述的"潜在危机".族群关系、民族关系与社会关系的关系具有多向性、非对称性和动态性的特点.     

二维治理与产业国际竞争力的培育——全球价值链背景下的战略思考

产业国际竞争力是当前战略管理和国际贸易领域的一个重要研究问题.全球价值链背景下,国家和企业都是全球竞争市场上的行动者,它们已成为提升一国产业国际竞争力时需要同时关注的力量.国家和企业究竟应该如何发挥作用?治理是关键.与单一公司的治理相比,全球价值链背景下的治理显得更加复杂,总体上可以分为三类治理问题:企业内治理、产业治理和市场治理.本文从产业治理与市场治理的交互出发,构建全球价值链背景下发展中国家产业的二维治理模型,并由此区别出五种典型的主导治理模式,分别是自由市场、公共治理、产业治理、共同治理和网络治理.不同的主导治理模式体现了国家和企业在其中扮演的不同角色,进而形成对产业国际竞争力的不同影响.     

Development of a Screening Approach to Interpret Human Biomonitoring Data on Volatile Organic Compounds: Reverse Dosimetry on Biomonitoring Data for Trichloroethylene

A screening approach is developed for volatile organic compounds (VOCs) to estimate exposures that correspond to levels measured in fluids and/or tissues in human biomonitoring studies. The approach makes use of a generic physiologically-based pharmacokinetic (PBPK) model coupled with exposure pattern characterization, Monte Carlo analysis, and quantitative structure property relationships (QSPRs). QSPRs are used for VOCs with minimal data to develop chemical-specific parameters needed for the PBPK model. The PBPK model is capable of simulating VOC kinetics following multiple routes of exposure, such as oral exposure via water ingestion and inhalation exposure during shower events. Using published human biomonitoring data of trichloroethylene (TCE), the generic model is evaluated to determine how well it estimates TCE concentrations in blood based on the known drinking water concentrations. In addition, Monte Carlo analysis is conducted to characterize the impact of the following factors: (1) uncertainties in the QSPR-estimated chemical-specific parameters; (2) variability in physiological parameters; and (3) variability in exposure patterns. The results indicate that uncertainty in chemical-specific parameters makes only a minor contribution to the overall variability and uncertainty in the predicted TCE concentrations in blood. The model is used in a reverse dosimetry approach to derive estimates of TCE concentrations in drinking water based on given measurements of TCE in blood, for comparison to the U.S. EPA's Maximum Contaminant Level in drinking water. This example demonstrates how a reverse dosimetry approach can be used to facilitate interpretation of human biomonitoring data in a health risk context by deriving external exposures that are consistent with a biomonitoring data set, thereby permitting comparison with health-based exposure guidelines.     

Comparison of leadership styles in Confucian Asian countries

The purpose of this study was to examine the overall impact of four leadership styles (charismatic, directive, participative, and supportive) in four Confucian Asian countries, China, Japan, South Korea, and Singapore, by reviewing recent studies conducted in those countries. By reviewing 38 studies selected from 430 studies published between 2005 and 2016, we identify the impact of the four leadership styles in the four Asian countries. We start with the research question and purpose, and then propose criteria for selecting the relevant recent studies followed by a review of cultural heritage and its influence on leadership in the four Asian countries. We summarize and review the studies and, finally, discuss the theoretical and practical contributions of this study.     

Order consolidation for hierarchical product lines

We consider the batch production of hierarchical product lines in raw material industry where the whole or parts of multiple customer orders may be consolidated and processed in the same batch if their product specifications are compatible. The objective of the problem is to find maximum possible number of batches completely filled up to their capacity. The compatibility relationship among product specifications is represented by a graph called the compatibility graph. If the compatibility graph is an arbitrary graph, the problem is proven to be NP-hard and belongs to Max SNP-hard class. We develop an optimum algorithm for an important subclass of the problem where the graph is a quasi-threshold graph which in fact is the case for producing hierarchical product lines that are often found in raw materials industry.     

商业生态系统价值结构、企业角色与战略选择

与强调企业在商业生态系统中如何攫取领导地位的战略观不同,本文把研究重心放在了企业战略如何塑造成功商业生态系统上。首先,本文构建了成功商业生态系统的价值结构模型,为企业的战略选择提供了微观与宏观上的方向与路径。其次,本文讨论了与成功商业生态系统相匹配的企业角色,并结合价值结构模型定义了与企业角色相匹配的战略任务。最后,在此基础上,重点阐述了骨干型企业在如何塑造成功商业生态系统过程中具体的宏观战略选择路径与机制问题。     

王维的厚德载物思想

王维诗歌的思想并不恪守某道,不胶滞于成见,而是兼容并包的,其思想的根基是厚德载物的哲学思想。所以,诗人能达到“天人合一”的艺术境界。只有从这一哲学高度去思考,才能正确剖析复杂的王维现象。     

A sequential conditional probability ratio test procedure for comparing diagnostic tests

In this paper, we derive sequential conditional probability ratio tests to compare diagnostic tests without distributional assumptions on test results. The test statistics in our method are nonparametric weighted areas under the receiver-operating characteristic curves. By using the new method, the decision of stopping the diagnostic trial early is unlikely to be reversed should the trials continue to the planned end. The conservatism reflected in this approach to have more conservative stopping boundaries during the course of the trial is especially appealing for diagnostic trials since the end point is not death. In addition, the maximum sample size of our method is not greater than a fixed sample test with similar power functions. Simulation studies are performed to evaluate the properties of the proposed sequential procedure. We illustrate the method using data from a thoracic aorta imaging study.     

On estimation of conditional density models with two-phase sampling

Suppose that the conditional density of a response variable given a vector of explanatory variables is parametrically modelled, and that data are collected by a two-phase sampling design. First, a simple random sample is drawn from the population. The stratum membership in a finite number of strata of the response and explanatory variables is recorded for each unit. Second, a subsample is drawn from the phase-one sample such that the selection probability is determined by the stratum membership. The response and explanatory variables are fully measured at this phase. We synthesize existing results on nonparametric likelihood estimation and present a streamlined approach for the computation and the large sample theory of profile likelihood in four different situations. The amount of information in terms of data and assumptions varies depending on whether the phase-one data are retained, the selection probabilities are known, and/or the stratum probabilities are known. We establish and illustrate numerically the order of efficiency among the maximum likelihood estimators, according to the amount of information utilized, in the four situations.