Bayesian MCMC Mapping of Quantitative Trait Loci in a Half-sib Design: a Graphical Model Perspective

Graphical models provide a powerful and flexible approach to the analysis of complex problems in genetics. While task-specific software may be extremely efficient for any particular analysis, it is often difficult to adapt to new computational challenges. By viewing these genetic applications in a more general framework, many problems can be handled by essentially the same software. This is advantageous in an area where fast methodological development is essential. Once a method has been fully developed and tested, problem-specific software may then be required. The aim of this paper is to illustrate the potential use of a graphical model approach to genetic analyses by taking a very simple and well-understood problem by way of example.     

China''''s Cooperative Exploration of Oil and Gas and Its Taxation System

China' s foreign-oriented oil taxation system has, from the beginning, been based upon the positive experiences of other oil-producing countries and has incorporated common international practices. The system has been perfected over decades. It of fers more incentives than other oil-producing countries in the following four aspects: (1) Income tax has a "wide tax base and low tax rate"; (2) VAT levies a low tax rate on ma-     

Blocked-Error-R 2: A Conceptually Improved Definition of the Proportion of Explained Variance in Models Containing Loops or Correlated Residuals

Bentler and Raykov (2000, Journal of Applied Psychology 85: 125–131), and Jöreskog (1999a, http://www.ssicentral.com/lisrel/column3.htm, 1999b http://www.ssicentral. com/lisrel/column5.htm) proposed procedures for calculating R ² for dependent variables involved in loops or possessing correlated errors. This article demonstrates that Bentler and Raykov’s procedure can not be routinely interpreted as a “proportion” of explained variance, while Jöreskog’s reduced-form calculation is unnecessarily restrictive. The new blocked-error-R ² (beR ²) uses a minimal hypothetical causal intervention to resolve the variance-partitioning ambiguities created by loops and correlated errors. Hayduk (1996) discussed how stabilising feedback models – models capable of counteracting external perturbations – can result in an acceptable error variance which exceeds the variance of the dependent variable to which that error is attached. For variables included within loops, whether stabilising or not, beR ² provides the same value as Hayduk’s (1996) loop-adjusted-R ². For variables not involved in loops and not displaying correlated residuals, beR ² reports the same value as the traditional regression R ². Thus, beR ² provides a conceptualisation of the proportion of explained variance that spans both recursive and nonrecursive structural equation models. A procedure for calculating beR ² in any SEM program is provided.     

Influence analysis for Poisson inverse Gaussian regression models based on the EM algorithm

For Poisson inverse Gaussian regression models, it is very complicated to obtain the influence measures based on the traditional method, because the associated likelihood function involves intractable expressions, such as the modified Bessel function. In this paper, the EM algorithm is employed as a basis to derive diagnostic measures for the models by treating them as a mixed Poisson regression with the weights from the inverse Gaussian distributions. Several diagnostic measures are obtained in both case-deletion model and local influence analysis, based on the conditional expectation of the complete-data log-likelihood function in the EM algorithm. Two numerical examples are given to illustrate the results.     

基于产学研合作模式下的财经类院校人才培养研究

产学研合作在我国已践行近二十年,但还存在诸多问题,特别在产学研合作培养人才方面还很不完善。财经类院校在产学研合作培养人才上应转变观念,变“单一人才培养模式”为“多途径人才培养模式”;借政府之手“牵线搭桥”,利用政策引导产学研合作;改革课程设置,实行“导师制”;改革教学方式,引入“头脑风暴、情境模拟”等教学方式;加强师资队伍建设,构建一支能打通理论与实践“任督二脉”的双师型教师队伍。     

美、德农业社会化服务提供的启示

美国的农业社会化服务主要由三个部分组成：农业公共服务体系、集体农业服务体系和私人农业服务体系。公司＋农场、公司＋农户以及合作供销是美国农业社会化服务的三种形式。德国的农业社会化服务体系在于农业专业合作社组织的成功发展,尤其是健全的农村金融服务体系,由一个具有三级层次结构的分权型组织组成,通过立法和提供一些优惠政策,政府在服务体系中起了重要作用。我国农业社会化服务体系的组成和服务形式与美、德十分相似,在推动农村经济发展方面却有一定差异,美国和德国农业社会化服务的经验对中国农业社会化服务的发展具有重要启示。     

浅析高职物流专业校企合作中的瓶颈及对策

以地处粤北山区韶关的广东松山职业技术学院物流专业为例,着重分析高职物流专业校企合作已经遇到的瓶颈,并提出了相应的对策与建议。     

浅谈中蒙两国旅游业的合作与发展

中蒙两国是友好邻邦,自建交以来,两者双边贸易得到持续稳定的发展。近年来,随着旅游业在两国国民经济中的地位日渐突出,同时,两国在区位、交通、资源禀赋、外交政策、发展需求等多方面的优势,使得两国在旅游业的发展上存在各自独特的差异,同时又极具互补性。所以加强两国在旅游业上的合作和发展,这对中蒙两国的友好合作,对亚洲乃至世界安全和发展来说都是举足轻重的。     

上合组织多边合作的前景——管道合作视角的分析

能源领域的合作项目——尤其是管道合作——是上合组织多边合作的一个重要方向。于2009年底开通的“中国-中亚”天然气管道就是这种多边合作的新亮点。互利共赢是管道成功的理念基础,它不仅是中国能源安全的有力保障,同时也符合管道的起始国和过境运输国的国家利益。