共查询到20条相似文献,搜索用时 796 毫秒
1.
苏长明 《成都大学学报(自然科学版)》2012,(3):254-257
研讨了J2ME和J2EE的技术特点与安全通信机制,分析了移动终端应用系统的体系结构、服务器端架构技术和优化设计.设计并实现了一个移动终端应用程序与Web服务端通信系统,该系统是一个典型的移动电子商务系统,具有良好的扩展性. 相似文献
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为解决电动汽车充电难、充电桩分布不密集的问题,通过对第三方地图和LBS(Location Based Services)的充分利用,采用基于SOAP(Simple Object Access Protocol)协议的Web Service方法实现服务端与客户端的信息交互,开发了基于LBS的电动汽车充电服务系统Android客户端应用,实现实时定位、地址检索、充电桩信息显示、路径导航和预约充电等功能,方便用户对充电桩的查询和使用。 相似文献
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介绍了一个自主开发的移动学习系统的设计和实现;该系统基于J2ME和Web senrices技术,其中J2ME用于手机端客户程序的开发,而Web Services技术则用于处理服务器端和客户端之间的交互;该系统能够配置在移动通信设备上,满足了随时随地的移动学习需要. 相似文献
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李轶 《江汉大学学报(自然科学版)》2012,40(5):56-60,89
在JavaScript语言重新受到重视的今天,其运行环境也正逐渐从传统的Web客户端向服务器端延伸。作为服务器端JavaScript引擎的典型代表,Rhino引擎具有广泛的平台支持和应用基础。通过将Rhino引擎置于一个标准的Java servlet中,便可构造出一个支持JavaScript的服务端脚本容器。借助Rhino引擎,Web开发者不仅能在脚本容器内部访问Java对象,而且还获得了整个Java平台的丰富类库及应用框架的支持。与此同时,服务器端JavaScript还统一了Web开发的前、后台语言,降低了开发难度并提高了开发效率。 相似文献
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为了能让网络管理人员使用Web浏览器在网络节点上方便及时地观察网管系统所管理设备产生的告警信息,基于AJAX、J2EE技术设计了网管系统的告警实时显示Web模块。本文论述了告警Web模块的设计方案,给出了基于GWT框架的告警Web模块客户端和服务器端的实现结构。 相似文献
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KJava开发平台和GPRS技术给无线通讯提出了新的解决方案,在支持KJava技术的Java手机上,开发移动设备数字图书馆系统。系统由两部分组成:手机客户端与服务器端,手机客户端完成无线传输和检索、图书与期刊资料浏览,服务端响应手机客户端完成相应功能,笔者基于KJava的手机软件浏览图书期刊资料,对现有数字图书馆信息化建设的补充和新的尝试。 相似文献
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韩双旺 《中央民族大学学报(自然科学版)》2011,(3)
由于GIS中不但涉及属性数据,而且还涉及地理空间数据,因此数据量相对庞大,所以在设计和实现WebGIS时。必须考虑其性能问题.为了更高效地实现基于WebService的WebGIS的相关功能,有必要对其性能进行优化,这可通过增大Web Service颗粒度,不使用XML作为WebGIS系统内部的接口,压缩SOAP,通过异步访问服务器端Web Service中的Web方法,优化数据库,使用客户端和服务器端缓存等一系列优化措施来加快数据的访问速度,减轻网络传输负载,提高基于Web Service的WebGIS性能. 相似文献
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采用基于Web服务的网络化移植技术解决网络CAD系统中重用已有的CAD资源难题,提出了一个基于Web服务的网络化技术架构.采用J2EE作为开发平台,在客户端用ActiveX控件实现用户交互模块,在服务器端通过JNI接口在Web服务中调用其他模块,并采用XML来交换数据,以此实现了一个纹织提花CAD系统的网络化移植,为更多的单机应用程序进行网络化移植提供了一种解决方案. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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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。 相似文献
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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. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
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- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
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- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
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 相似文献
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《上海师范大学学报(自然科学版)》2014,(5):550
<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 相似文献