Web应用中AJAX与传统网络性能对比分析

作为Web2.0时代最具代表性的技术AJAX即"Asynchronous JavaScript and XML"(异步JavaScript和XML),AJAX为传统Web应用程序带来了变革。AJAX揭开了无刷新更新页面时代的序幕,并有代替传统Web开发中采用表单递交方式更新Web网页的趋势。在引入AJAX关键技术的基础上,对传统Web应用与AJAX应用实现过程进行比较,结合技术实践分析了AJAX的优势和存在的缺陷。     

基于AJAX技术的网络教学资源库的应用研究

结合AJAX的原理和特点,探讨了AJAX在网络教学资源库平台中的应用,形成具有浏览器端与服务器端异步通信能力的系统框架,以提高系统的执行效率,合理利用资源。     

基于jQuery框架的Web研究与实现

传统的Web应用解决方案将所有的操作集成在服务器端进行,客户端所做的工作只是简单的显示网页。Ajax的出现改变了传统Web开发的模式,通过异步方式的数据传输实现Web服务的有效性和独立性,将之前的单击显示页面式的体验变成具有交互性、灵活性的桌面应用程序体验。基于Ajax技术的Web程序开发和应用不仅对浏览器兼容性差,而且采用传统的XML进行数据传输。XML数据格式在使用的过程中不仅会带来很多数据冗余,而且还不容易对其解析。将XML和JSON进行对比和分析,最终以JSON作为Ajax通信中的数据传递格式,并用jQuery中的方法来解析JSON数据与封装Ajax异步请求。jQuery是一个优秀、灵活多变的JavaScript框架,可以兼容CSS3和各种主流的浏览器,其模块化的开发方式可以让开发者按需加载资源。在分析了传统的Web开发模式存在的问题后,提出了基于jQuery框架的Ajax异步请求,实现Web快速便捷开发与更优化的用户体验。     

AJAX技术在图文直播系统中的应用

AJAX是近几年出现的Web开发新技术,它实现了浏览器和服务器之间的异步交互.结合四川广播电视大学30周年校庆图文直播系统,对AJAX技术在图文直播系统的应用作了详细分析.应用AJAX技术,实现了浏览器和直播服务器之间的异步通信,很好解决了浏览器阻塞问题,并带来良好的用户体验.实践表明,采用AJAX方式与传统的同步方式相比,具有图片刷新快,无页面闪烁的特点.     

AJAX应用程序框架的比较及应用

AJAX用于构建更为动态和响应更灵敏的Web应用程序,其开发框架有浏览器端和服务器端两种实现技术.本文比较了当前流行的AJAX应用程序框架技术,并以DWR为例,说明如何使用服务器端框架开发AJAX应用程序.     

AJAX技术在WEB系统中的应用

AJAX是建立在JavaScript和XML技术之上的一门综合性技术,其工作原理实现对网络信息传递的异步交互过程。在WEB系统中,AJAX技术具有传统技术无法比拟的优点。本文以blog中的用户调查投票系统作为程序的实例,介绍了AJAX技术在WEB系统中的应用。     

基于PHP MySql Ajax的分页技术方案

Ajax是指通过JavaScript发出异步HTTP请求,在不重载页面的情况下从服务器获取信息。本文利用Ajax结合PHP与MySql数据库解决分页技术问题。该方案实现的总体思路是通过用户点击分页导航条上的超链接来调用JS函数,向服务器端发送异步的HTTP请求来获取需要的数据,并在服务器端将数据以XML格式返回到客户端,在客户端用DOM进行数据的解析并呈现。     

基于AJAX的网络地质图库标记系统的设计与实现

AJAX是近几年出现的WEB开发新技术,它实现了浏览器和服务器之间的异步交互.目前的网络地质图库系统大多采用传统B/S同步交互技术,由于图库中传输的大多是数据量很大的地质图件,因此经常出现浏览器阻塞现象.将AJAX技术应用到了网络地质图库系统中,实现了浏览器和地质图库服务器之间的异步交互,与采用传统B/S同步方式的网络地质图库系统相比,具有图片刷新快,无页面闪烁的特点.由此研究了基于AJAX的异步地质图实现技术,并实现了基于AJAX的网络地质图库标记系统,不仅扩充了图件标记管理功能.而且成功解决了浏览器阻塞问题.     

AJAX在Web中的异步交互应用

通过AJAX技术在社区系统的具体应用，阐明了AJAX技术在Web异步交互方面的优越性。在用户和服务器之间引入一个AJAX引擎，可以消除Web应用的开始一停止一开始一停止的交互过程．使用委托和门面模式相结合的复合模式，隐藏了服务器端逻辑的具体实现，降低了因页面直接访问服务器逻辑而引发安全问题的可能性．对基于AJAX模式下开发Web应用具有一定的实用价值．     

AJAX在Web系统中的应用实践

文章通过AJAX技术在Web系统的具体应用,阐明了AJAX技术在Web异步交互方面的优越性。使用委托和门面模式相结合的复合模式,隐藏了服务器端逻辑的具体实现,降低了因页面直接访问服务器逻辑而引发安全问题的可能性。对在基于Ajax模式下开发Web应用具有一定的实用价值。     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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