可复用软件构件技术

随着软件复用、软件构件技术和ＯＯ 技术的发展,基于可复用构件的软件开发成为现实。实践证明,通过开发可复用软件的两个生命周期：开发可复用软件构件和基于可复用构件的软件开发,软件复用技术可以极大地提高软件开发效率和质量。简述了软件复用技术、软件构件技术、基于可复用构件的软件开发以及构件对象模型（ＣＯＭ） 。     

基于软构件的CAI系统的设计

在分析传统的开发CAI系统方法缺点的基础上,研究了如何利用软构件技术来开发CAI系统,提出了基于软构件技术的CAI系统开发方法.结果表明,基于软构件技术的CAI系统开发方法可以最大限度地提高软件的复用性,从而提高后继CAI系统开发的效率.     

软件复用技术在基于B/S模式的新闻管理系统中的应用研究

软件复用是在软件开发中避免重复劳动的解决方案.通过软件复用,可以提高软件开发的效率和质量。当前软件构件技术被视为实现成功复用的关键因素之一,本文介绍软件复用的基本概念及关键技术,并结合实际开发中的经验,对基于B/S模式新闻管理系统开发中的软件复用进行了一定的研究。     

软件复用技术在基于B/S模式的新闻管理系统中的应用研究

软件复用是在软件开发中避免重复劳动的解决方案.通过软件复用,可以提高软件开发的效率和质量。当前软件构件技术被视为实现成功复用的关键因素之一,本文介绍软件复用的基本概念及关键技术,并结合实际开发中的经验,对基于B/S模式新闻管理系统开发中的软件复用进行了一定的研究。     

基于构件的软件复用技术

软件复用是提高软件开发效率和质量的有效途径,构件技术是支持软件复用的核心技术,是近几年来迅速发展并受到高度重视的一个学科分之。本文分析软件构件技术及其几个不同层次的软件复用技术构件模型,探讨了实现复用的机制。并对三者的关系和区别进行分析与比较。     

EJB构件技术在学生选课管理中的应用

软件复用是利用现有的软件成分来构造新的软件系统的过程,构件技术是实现软件复用的核心技术.介绍了EJB构件技术,阐述了选课构件的设计过程,最后给出了第一次选课的构件实现.     

构件化软件及中间件的研究

随着构件复用研究的深入和中间件应用领域的扩大,构件技术及中间件成为目前研究的热点。本文分析构件化软件及中间件的本质,探讨了构件与中间件之间的联系,为构件化软件指导中间件开发提供一条可行途径。     

基于构件的软件复用技术应用研究

基于构件的软件开发技术是一种在软件开发中避免重复劳动的解决方案,当前软件构件技术被视为实现成功复用的关键因素之一,本文介绍软件复用的基本概念及关键技术,最后,就基于构件软件开发技术在管理信息系统中的应用作了探讨,给出了相应的开发模型及具体事例.     

基于可复用构件的软件开发方法

软件复用是指在开发新的软件系统时,对已有软件的重新使用,该软件可能是已存在的软件,也可能是专门设计的可复用构件.基于构件的软件开发是指利用已开发完成的商业构件(或可复用的构件),按应用需求组装形成软件应用系统的开发方法.基于软件构件的软件复用技术是实现软件工业化生产的技术基础,是解决"软件危机"的重要途径.在对软件构件及其相关技术进行研究的基础上,将软件构件技术应用于教务管理系统的开发实践中,给出了该开发方法的具体应用.     

软件构件技术研究

指出软件复用与构件的基本概念,重点分析了当前构件技术主要研究的各项内容与现状,在此基础上,提出了构件研究过程中存在的主要问题,并对今后构件技术的发展进行了展望.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Editorial note for the special topic on ＂Nanopore Analysis＂

The concept of nanopore analysis, using the pore-forming protein a-hemolysin to detect individual nucleic acids at a single-molecule level, was first proposed in 1996. Over the past two decades, tremendous progress has been made in the nanopore field, and nanopore analysis has become a label-free and high-throughput method for probing bio- molecules and other analytes with single-molecule sensi- tivity, especially holds the promising for ＂third generation＂ DNA sequencing. However, challenges still remain in the experimental strategies and the design of whole nanopore-based instruments. Here, we proudly present a special topic dedicated to the topic of ＂Nanopore Analysis＂, with 8 reviews/articles providing up to date coverage of the experimental strategies, theoretical calcu- lations and simulations, and instrument design. Reviews and articles on the experimental strategies cover control of DNA partitioning into a nanopore, detection of target DNA, and the advantages of nanopore-based DNA sequencing. The theoretical calculations and simulations discuss the translocation behavior of DNA, and an inte- grated measurement system and data analysis software are presented for instrument design.     

Effects of climate change on biodiversity

1 Rise of studies on climate change＇s effects on biodiversity
Until the 1980s, climate change and biodiversity were studied as two independent disciplines for more than a century. In 1992, the Ecological Society of America＇s annual report named climate change, biodiversity, and the sustainable ecological system as the three major global environmental issues of the twenty-first century [1].     

Discussing the Expansive Learning in Modern Organizations

<正>1 Introduction Endeavours on learning methods have long occupied the mind spaces of scholars and there have been theories abound on how people learn and in what way organisations can use some of the knowledge gained in the art of learning to maximise human productivity.While the theories by themselves are not solutions to problems,they are steps of inquiry that provide us with interesting perspectives that we can use to extend our knowledge of the dimensions of learning.This paper is an exploratory work on the theories postulated by three notable scholars including Zimmerman     

Progress in Linear Scaling Non-Orthogonal Localized Molecular Orbitals Method

The non-orthogonal localized molecular orbital(NOLMO)is the most localized representation of electronic degrees of freedom.As such,NOLMOs are thus potentially the most efficient for linear scaling calculations of electronic structures for large systems.However,direct ab initio calculations with NOLMO have not been fully implemented and widely used,partly because of the slow convergence issue in the optimization of NOLMO.We devel-     

An Accurate and Universal HEOM Approach to Strongly Correlated Quantum Impurity Systems

A hierarchical equations of motion(HEOM)approach is developed for general open quantum systems coupled to fermionic environment.The HEOM method is in principle formally exact,as it resolves nonperturbatively the combined effects of many-body interaction,system-bath dissipation,and non-Markovian memory.In practice,the HEOM approach is highly accurate and efficient for the characterization of strongly correlated quantum impurity sys-     

关于有理混合吸引子的Ciric型非唯一不动点定理

本文我们应用有理混合吸引子条件去证明具非唯一不动点的映射Ciric型的若干不动点定理.结果推广并改进已知的一些结果.     

次线性算子交换子在变指数Herz-Morrey空间上的有界性

本文主要利用给出的次线性算子分别与BMO函数及Lipschitz函数生成的交换子在变指数L~(p(·))(R~n)空间上的有界性,证明了其在变指数Herz-Morrey空间MK_(q,p(·))~α~((·)),λ(R~n)上的有界性.     

利用GPS双频观测值实现PPP电离层延迟高阶项改正

给出了利用双频观测值计算L3组合电离层延迟高阶项改正的方法,并与全球电离层延迟文件的改正效果进行对比.利用赤道附近的15个国际全球卫星导航定位系统服务组织(IGS)站的数据进行比较,结果表明:2种方法计算的电离层二阶项延迟互差最大不超过1 cm,三阶项延迟互差最大不超过5 mm;电离层高阶项改正后的观测值精密单点定位(PPP)解算结果N、E、U方向互差平均值分别为0.4、0.5、1.0mm,因此2种改正方法效果在同一水平.