On an adaptive version of the Metropolis–Hastings algorithm with independent proposal distribution

In this paper, we present a general formulation of an algorithm, the adaptive independent chain (AIC), that was introduced in a special context in Gåsemyr et al . [ Methodol. Comput. Appl. Probab. 3 (2001)]. The algorithm aims at producing samples from a specific target distribution Π, and is an adaptive, non-Markovian version of the Metropolis–Hastings independent chain. A certain parametric class of possible proposal distributions is fixed, and the parameters of the proposal distribution are updated periodically on the basis of the recent history of the chain, thereby obtaining proposals that get ever closer to Π. We show that under certain conditions, the algorithm produces an exact sample from Π in a finite number of iterations, and hence that it converges to Π. We also present another adaptive algorithm, the componentwise adaptive independent chain (CAIC), which may be an alternative in particular in high dimensions. The CAIC may be regarded as an adaptive approximation to the Gibbs sampler updating parametric approximations to the conditionals of Π.     

构建我国法务会计人才培养模式

随着我国市场经济的快速发展，经济纠纷、经济案件中所涉及的财务会计问题越来越多，迫切需要法务会计人员从会计和法律的专业角度进行调查、取证和鉴定，为法庭提供专家意见。但我国法务会计理论研究滞后、从业人员素质不高、法务会计人才严重匮乏，远远不能满足日益增长的法务会计需求。由于法务会计与财务会计有较大区别，因此，我国应加强法务会计建设，强化法务会计理论研究，并针对我国法务会计的现状，构建学历教育、在职教育和社会教育三位一体的法务会计人才培养模式，以培养具有中国特色的、多层次的、复合型法务会计人才。     

受托责任与决策有用在会计目标中的兼容性

会计目标应在分析社会经济环境的基础上明确会计信息主要需求者,根据他们的需求来确定.中国市场经济体制中的国有成份所占的比重和资本市场的发展状况,使国家以所有者和投资者的双重身份成为现阶段会计信息的主要需求者.这决定了会计目标具备受托责任与决策有用这两者的兼容性特征,而这种兼容性在中国会计实务中也有所体现.     

《会计电算化》课程教学目标内容和方式的探讨

知识经济和信息技术革新,要求我们要不断更新会计电算化教学目标、丰富教学内容以及优化教学方式,由此来培养新时期适应经济发展的综合性会计电算化人才。     

信息资源会计:企业信息化效益计量和评价的新思路

全面系统地对信息资源投入和收益的计量和评价一直是推动企业信息化工作的难点 ,解决该问题的一个新思路是 :信息资源会计。信息资源是广义的概念 ,即包括信息内容和信息技术、设施、人员等全部支持要素在内。企业信息化必然要投入信息资源 ,结果会引起组织资源配置的变化和重新组合 ,以货币价值形式计量、分析、评价这一过程就是信息资源会计的主要职能。     

论吴稚晖20世纪初期的科学教育思想

在吴稚晖当时看来,教育是一个国家盛衰的"总因",而配称教育二字者只是科学工艺,近代中国的落后挨打就在于科学工艺发展的迟滞。在批判国内旧式教育的同时,他编报印书,普及科学常识以提高国民素质,鼓吹科学工艺来倡导青年劳作。特别是他创造性发起的留法俭学运动和创办海外中国大学,为近代中国培养了一大批急需的高科技人才,在近代中国教育史、中外文化交流史上写下了光辉的一页。     

报业会计信息系统安全部分控制

报业会计电算化的系统安全,是报业会计信息系统的安全会计电算化的灵魂和核心,而内部控制则是保障报业会计电算化系统安全的一项重要工作。本文从报业会计电算化工作的实际出发,针对目前报业会计电算化应用的现状,结合报业会计电算化的特点和管理要求,阐述了报业会计电算化系统安全内部控制问题的必要性,并提出了如何加强报业会计电算化信息系统安全,有效进行内部控制的一些措施和办法。     

浅谈环境会计

文章对环境会计基本构成如环境会计目标、基本原则、环境问题对财务活动的影响、环境会计学分析等几个方面进行了深入研究 ,提出构建环境会计学的基本设想 ,为我国企业健康科学地发展 ,提供必要的财会业务支持     

A Unified Approach to the Characterization of Equivalence Classes of DAGs, Chain Graphs with no Flags and Chain Graphs

Abstract.  A Markov property associates a set of conditional independencies to a graph. Two alternative Markov properties are available for chain graphs (CGs), the Lauritzen–Wermuth–Frydenberg (LWF) and the Andersson–Madigan– Perlman (AMP) Markov properties, which are different in general but coincide for the subclass of CGs with no flags . Markov equivalence induces a partition of the class of CGs into equivalence classes and every equivalence class contains a, possibly empty, subclass of CGs with no flags itself containing a, possibly empty, subclass of directed acyclic graphs (DAGs). LWF-Markov equivalence classes of CGs can be naturally characterized by means of the so-called largest CGs , whereas a graphical characterization of equivalence classes of DAGs is provided by the essential graphs . In this paper, we show the existence of largest CGs with no flags that provide a natural characterization of equivalence classes of CGs of this kind, with respect to both the LWF- and the AMP-Markov properties. We propose a procedure for the construction of the largest CGs, the largest CGs with no flags and the essential graphs, thereby providing a unified approach to the problem. As by-products we obtain a characterization of graphs that are largest CGs with no flags and an alternative characterization of graphs which are largest CGs. Furthermore, a known characterization of the essential graphs is shown to be a special case of our more general framework. The three graphical characterizations have a common structure: they use two versions of a locally verifiable graphical rule. Moreover, in case of DAGs, an immediate comparison of three characterizing graphs is possible.     

有错检验情况下标准型抽样方案的设计

本文给出了在有错检验情况下标准型抽样方案的设计方法，讨论了误检概率ｐ，ｐ′对抽样方案的影响，并给出抽样方案的实际应用。