Java语言中主方法的作用与类的划分

深入分析Java语言中类的概念,将从客观实体中抽象出来的类称为模型类,将实现某些功能的类称为功能类。进一步通过应用实例证明Java语言中的主方法具有特殊的作用,应该将Java语言中的主方法看作“工作类”。     

Java的安全机制

Java因其安全性、可伸缩性、易移植性等特点受到人们的关注,本文从Java语言层次安全特性和企业安全特性来分析Java的安全机制。     

Java跨平台特性的实现原理

跨平台是Java语言的重要特性,和普通高级语言源程序跨平台不同,Java语言的跨平台是指目标程序跨平台。这种跨平台特性使Java语言成为了目前使用最为广泛的Internet应用编程语言。本文介绍Java语言和其他高级语言在跨平台特性上的区别,以及Java语言实现跨平台特性的原理。     

基于Java的数据签名的实现

简要分析了数字签名、数字证书管理的基本原理和实现机制,根据Java平台的安全特性设计了对报文进行数字签名和鉴别的安全体系结构与机制,给出了使用Java语言实现数据签名的详细过程。     

Java中"异常机制"的深入研究

阐述了什么是异常，Java语言的缔造者为什么要引入“异常机制”，在编写程序中应该怎样应用“异常”等问题，并从Java虚拟机的角度深入分析了Java“异常机制”的工作原理。     

面向对象的编程思想的建立

继承、多态和封装是面向对象编程的三大特性,抽象则是面向对象编程的本质。编写人员在众多对象中提炼存在于事物之间共同拥有的元素形成类,对类再利用面向对象的三大特性进行进一步编写程序。Java是面向对象的语言,可被用来建立一个简单的程序来展示抽象的建立过程。     

Java异常处理技术

异常处理是Java安全性的一个重要保护手段,在Java程序设计中利用好Java的异常处理机制,可以增进程序的稳定性和效率。本文系统介绍了Java语言中异常的概念、异常处理的意义Java异常处理的机制Java中异常类的层次结构Java异常处理方法和异常处理原则。     

Java语言“与平台无关性”的实现

Java语言的出现给Internet的应用与发展带来新的活力，尤其是它的“与平台无关性”适应了Internet计算模式，因此得到了迅速的发展。本文阐述了Java语言“与平台无关性”的实现机理及所涉及的关键技术。     

Java 数据库应用系统的实现

Java语言简洁、集多种程序设计语言之大成,且面向对象、具有可移植性、分布性、安全性、高性能等特色。用Java语言编写成的Java程序与数据库的接口规范JDBC,使Java程序可以通过统一标准规范的JDBCAPI来与不同的数据库通信。Java应用软件与数据库的结合及Java语言的跨平台特性,使之成为Internet和Intranet环境下开发数据库应用系统的理想选择方案。     

网络中的世界语——Java语言

1995年12月,Sun Microsystems Inc推出的Java程序设计语言环境,使人们看到了解决问题的曙光.Java是一种易移植、高效、简捷,面向对象的程序设计语言并支持运行时的动态环境.与C/C++相比,它具有更加完善的结构无关性、真正的面向对象和与Internet的协同工作等特性.介绍了Java的设计思想及其特性,并提出作者的一些看法.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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