第二语言习得中认识论方式对大学英语教学的作用

本研究调查了中国英语学习交际(口语与书面语)过程中的信息加工过程。结果表明，输入量的增加导致学习成绩(即产出)的提高。在信息加工过程中，尽量多用英语来进行思维，这样就可以减少粤有可能避免母语对目的语语言学习的影响。     

两参数马氏过程的若干新进展(Ⅰ)

综述了杨向群教投在湘潭大学主持的多参数马氏过程讨论班同志们近4年来有关两参数马氏过程方面的一系列研究成果.共分六个部分。1 基本概念及符号。2 各种两参数马氏性间的相互关系.在已有工作的基础上,进一步揭示了各种两参数马氏性间的相互关系,得到了一个比较完美的相互关系图.举出反例,推翻了三个法国学者的结论。3 给出了两参数马氏链的三点转移函数的定义,说明它与单参数马氏链的转移函数之间既存在本质的区别,又有着密切的联系.介绍了可测三点转移函数的概念,并研究了它的正则性,恒正性,状态对空间的分解,极限函数的正则性及参数对称的若干结果.还研究了标准三点转移函数族的状态对空间的分解,微分性及向上、向下、向左、向右偏微分方程组.表明:三点转移函数族的研究不可能是单参数结果的简单推广。4 引入了Poisson单的概念,讨论了它的单跳跃性,鞅性,Kolomogorov 0—1律,刻划,等价条件及其在射线上导出过程的性质.证明了它不存在广义三点转移函数.因而不能根据通常的存在定理证明它的存在性。为此我们引入了扩状Poisson单及其三点转移函数的概念,证明了Poisson单的存在性,作为Poisson单的直接推广,我们给出了两参数随机事件流的定义,讨论了其性质。5 介绍了广义Brownian单的定义,给出了它在增道路下的Levy表现和鞅刻划,积分表现,随机时间变换,概率估计,重对数律,Harness性,广义B—Harness性及表征等.最后指出,用广义Brow-nian单表现的一类指数过程是一强鞅。6 作为随机微分方程解的两参数马氏过程.设B为Browian单,得到了两参数随机微分方程dX(S,t)=α(s,t,X(S,t))dB(s,t) β(s,t,X(s,t))dsdt X(s,t)|(s,t)∈λ_0= y(s,t)解的存在唯一性,指出此解在一定条件的各种两参数马氏性,旦此解为宽过去规则马氏过程。     

On the stability of cognitive processes

Summary An empirical and mathematical model for self-organization is proposed, based on elemental properties, on unique interaction and on the combination of hierarchical elements. In the model, higher elements are stabilized by the cognitive (strong) interaction of subelements, disregarding intermediate elements. This is called elementary reductionism and is illustrated by the sequence quarks-elementary particles-atoms-molecules-cells-organisms-societies. Optimal dynamic interaction of nonidentical elements is called cognitive stability. This is compared with thermodynamic equilibrium. The principal differences are outlined.     

Metabolic iteration,evolution and cognition in cellular proliferation

Summary A model for cellular proliferation is described according to which proliferation ensues when metabolism evolves towards commitment to DNA synthesis, and inhibition of proliferation occurs when enzymic interactions are iterated within a few metabolic pathways, another limiting factor being the supply of metabolites. The model successfully describes cellular growth and division as a cognitive process based on interaction within enzymic elements and the genome, and affords an explanation in these terms of some empirical phenomena which have previously been understood only as isolated observations.     

A mathematical approach to cognitive processes

Summary A mathematical formalization of cognitive processes based on concepts previously given in Experientia¹ is presented. Cognitive processes are described as a set of exponentially decaying interaction probabilities determined by previous interactions between different elements and an association parameter, the inverse of the cognitive stability. The interactions occur in a cognitive string surrounded by a cognitive plasma which carries the contextual information. The complexity of a cognitive process is proportional to time.     

树上跳过程的Dirichlet特征值的估计

Dirichlet特征值在微分方程中有很深入的研究,本文用概率的方法研究树上跳过程的Dirichlet特征值,对它进行估计,得到一个比较好的估计式:[()()]10supinf?λ≥ω∈weIωe,它在自伴算子的谱中起着非常重要的作用。     

A Formal Model for BPEL4WS Description of Web Service Composition

Communicating Sequential Processes （CSP） is a kind of process algebra, which is suitable for modeling and verifying Web service composition. This paper describes how to model Web service composition with CSP. A set of rules for translating composition constructor of Business Process Execution Language for Web Services （BPEL4WS） to CSP notations is defined. According to the rules that have been defined, the corresponding translation algorithm is designed and illustrated with examples . The methods for model checking, model verification and model simulation are also introduced.     

一种MIMO复杂过程的模糊建模新方法

针对难于建立精确数学模型的MIMO复杂过程,提出一种基于过程输入输出数据变化关系的模糊建模方法。即首先将一个MIMO系统分解成多个MISO子系统,对每一个MISO子系统按过程输出随输入变量变化的剧烈程度对输入变量论域进行划分。在此划分的基础上确定出MIMO复杂过程模糊模型的规则总数和前件参数;然后,由于要建立的模糊模型可以表示为一个前馈模糊神经网络,因此利用BP学习算法求得过程模型模型的后件参数。仿真举例验证了所述模糊建模方法的有效性。