Java类的动态装载机制及其在设计模式中的应用

介绍了Java类动态装载技术、与此项技术相关的设计模式以及如何在设计模式中应用类动态装载技术，并给出了实现一个可复用的类动态装载程序。     

基于SAAJ的移动Agent传输设计

Web Service的规范性和可集成性非常好,在企业级应用系统中获得越来越广泛的应用,在应用中常需要基于服务架构构建适用性较强的移动Agent。本文提出一个基于Web Services SAAJ技术的移动Agent解决方法,介绍如何描述移动Agent,并在Java环境下采用Java的序列化机制和自定义的Java类来动态载入Java字节码,以解决移动Agent的创建和持久化的问题,通过SAAJ技术解决移动Agent的传输问题,从而采用Java语言设计移动Agent,使得移动Agent在支持SAAJ的移动Agent服务器中运行。     

利用Java3D装载器装载X3D文件的一种实现方法

根据当前3D技术的现状,分析了目前大多数3D技术普遍存在的不能在一种3D格式下调用另一种已有3D图形文件,因而效率不高的问题。基于该问题,对Java3D技术及其Java3D装载器组件进行了介绍。并以Java3D装载器装载目前较为流行的X3D文件为例,给出了解决该问题的一种具体实现方法。     

基于JaVa语言的移动Agent开发平台

移动 Agent作为一种全新的分布式计算模型 ,其优越的性能受到越来越多的重视。Java语言由于其内建的平台无关性、目标序列化及动态类装载等机制 ,在设计和研究移动 A gent系统方面提供了独特的作用。文章给出了基于 Java语言的移动 Agent开发平台 ( MADP)的体系结构及关键代码 ,并设计了一个远程数据库检索的实例来验证 MADP的性能。实验结果表明 MADP系统具有功能完善、开放性强、稳定性高的特点     

JAVA平台上装载远程类文件的实现

Java虚拟机(JVM)使用一个类装载器(ClassLoader)根据应用程序的需要载入所需的类.结合实例阐述了如何自定义ClassLoader装载网络上的JAVA类文件并在本地执行.     

JAVA平台上装载远程类文件的实现

Java虚拟机(JVM)使用一个类装载器(Class Loader)根据应用程序的需要载入所需的类。结合实例阐述了如何自定义Class Loader装载网络上的JAVA类文件并在本地执行。     

浅析JSP网站开发中中文乱码问题

JSP技术广泛应用于动态网站的开发中。虽然Java语言具有跨平台的特性,但其在中文字符处理时常常出现乱码。本文分析了Java的字符编码规则,给出了JSP程序在三个执行过程中的字符编码,将JSP中文乱码分为三种情况,并给出了相应的解决方法。     

Java字节码异常处理中信息流的分析

为提高Java移动代码动态安全验证的准确性和实用性,通过分析Java字节码中异常处理的方式与流程,提出了追踪、记录异常处理中信息流的方法.采用字节码改写技术,将异常处理中信息流的相关数据封装在异常类当中,从而保证了所采取的处理对Java虚拟机的透明性,并进一步提高了动态验证的精度.     

基于构件的煤矿设备安全监测系统研究

以建立煤矿设备安全监测系统为目标,根据数据构件的标准,采用标准构件,在Java运行环境下使用菜单、窗口和模板,并根据煤矿设备监测信息的特点及用户的需求对刻面进行分类,实现了煤矿设备预警驱动构件的信息动态发布,有效解决了信息分散、资源不能共享的问题,提高了煤矿整体安全管理的监控能力。     

一种分布式应用数据交换系统的设计与实现

为了解决数据交换中适应不同安全级别、不同网络传输要求等问题,设计了一个基于消息中间件、支持不同数据优先级、不同密级和不同时段传输的可控数据交换系统(AppSwitch),并利用Java语言,基于IBM-MQ,实现了整个系统.该系统能够根据预先确定的安全要求、数据传输和交换策略,实现不同分布式应用系统之间异构数据有效的交换,达到系统互连互通的目的.系统的成功运行表明,通过在消息报文中增加加密标志、消息优先级别字段,在传输安全策略中增加时段控制等措施能够有效地解决该问题.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with