托马斯·纳什《春》的赏析及翻译

该文对英国文艺复兴时期剑桥的“大学才子”之一 ,诗人和剧作家托马斯·纳什的《春》从三个方面进行了赏析 :1.诗人运用了丰富多彩的意象 ;2 .诗人糅合了动态和静景 ;3.诗人运用了腹韵和五步抑扬格的韵律 ,并在学习、比较、借鉴名家前辈的译文之后完成了《春》的翻译     

The densest <Emphasis Type="Italic">k</Emphasis>-subgraph problem on clique graphs

The Densest k-Subgraph (DkS) problem asks for a k-vertex subgraph of a given graph with the maximum number of edges. The problem is strongly NP-hard, as a generalization of the well known Clique problem and we also know that it does not admit a Polynomial Time Approximation Scheme (PTAS). In this paper we focus on special cases of the problem, with respect to the class of the input graph. Especially, towards the elucidation of the open questions concerning the complexity of the problem for interval graphs as well as its approximability for chordal graphs, we consider graphs having special clique graphs. We present a PTAS for stars of cliques and a dynamic programming algorithm for trees of cliques. M.L. is co-financed within Op. Education by the ESF (European Social Fund) and National Resources. V.Z. is partially supported by the Special Research Grants Account of the University of Athens under Grant 70/4/5821.     

A correlation-theoretical interpretation of schur analysis

This paper is heavily leaned on the author's recent investigations concerning SCHUR analysis of non-negative Hermitian block matrices. The parameters of the matrix balls and the triangular choice scheme which describe a non-negative Hermitian block matrix will be interpreted in the framework of correlation theory     

多孔介质中可压缩混溶驱动问题的特征：混合元方法

本文考虑二维一般有界区域中的多孔介质同可压缩混溶动问题的数值解方法，给出了全离散特征－混合元格，证明了格式的唯一可解性，得到最佳Ｈ－模误差估计。     

农村合作医疗制度改革中村卫生室职能的思考

通过对村卫生室的现状特点以及农村居民健康状况和就诊行为的分析,探讨了新型农村合作医疗体制的制度缺陷。认为应该重新定位村级卫生室的职能,加大对村卫生室基础设施建设的资助,积极培养农村医疗保健人才,充分满足农村居民的医疗保健需求进而推动社会主义新农村建设。     

大工50周年校庆标志创作及环境设计综述

阐述大连理工大学建校 5 0周年校庆标志设计及环境设计策划实施的主要创作思想、创意的整体过程 ,以及创意成果的筛选和在实际过程中的应用     

摘要写作与篇章图式的培养

语言的输入和输出是二语习得中经常讨论的话题。要使语言能够自然地习得,就必须给学习者提供大量的可理解性输入,并能把这些可理解性知识输入转化为有效的输出。在读写过程中,篇章图式是理解和生成文章的一个关键的因素,因此,要从篇章语法、语义和语用三个方面培养学生的篇章图式。我们可将阅读形式作为输入,摘要写作形式作为输出,从而有效地提高学生的读写水平。     

Estimation of parameters in incomplete data models defined by dynamical systems

Parametric incomplete data models defined by ordinary differential equations (ODEs) are widely used in biostatistics to describe biological processes accurately. Their parameters are estimated on approximate models, whose regression functions are evaluated by a numerical integration method. Accurate and efficient estimations of these parameters are critical issues. This paper proposes parameter estimation methods involving either a stochastic approximation EM algorithm (SAEM) in the maximum likelihood estimation, or a Gibbs sampler in the Bayesian approach. Both algorithms involve the simulation of non-observed data with conditional distributions using Hastings–Metropolis (H–M) algorithms. A modified H–M algorithm, including an original local linearization scheme to solve the ODEs, is proposed to reduce the computational time significantly. The convergence on the approximate model of all these algorithms is proved. The errors induced by the numerical solving method on the conditional distribution, the likelihood and the posterior distribution are bounded. The Bayesian and maximum likelihood estimation methods are illustrated on a simulated pharmacokinetic nonlinear mixed-effects model defined by an ODE. Simulation results illustrate the ability of these algorithms to provide accurate estimates.     

一种DES数据加密实现方法

本文分析了 DES 算法,设计了一种用 Z-80CPU 芯片实现 DES 数据加密方案,并用单板机 TP-802实现了1200bit/s 的数据加密。文中还提出了对数据加密系统进行动态检测的方法。     

合成邏辑TAC中合子的生成

近年来,软件的形式开发越来越受重视。本文设计了一个形式系统,它能实现合成逻辑TAC中合子的自动生成。