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1.
随着Web2.0技术发展,PHP以其开源、面向对象设计、安全性、轻巧、跨平台等优点已成为当前最为流行的Web开发语言.Ajax动态交互技术能将笨拙的Web界面转化为互动性平台,能够更好地改善用户体验.基于PHP和Ajax技术组合,笔者以MYSQL为后台数据库设计了个人博客系统.  相似文献   

2.
Ajax在Web2.0中的应用研究   总被引:2,自引:0,他引:2  
Ajax是Web2.0的核心技术,它的出现带来了Web应用的重大变革。作为Ajax重要组成部分的Ajax Tags,在实现交互和动态网页中的作用日益突出。本文首先介绍Ajax的原理及其与Web2.0的关系,提出了建立在Ajax上的Web2.0应用模式。在此基础上,详细描述了Ajax Tags在Web2.0上的具体实现,并分析了Ajax技术的性能优势。  相似文献   

3.
Ajax用来描述一组技术,使浏览器可以为用户提供更为自然的浏览体验,克服了传统Web站点强制用户进入提交-等待-重新刷新显示这样的范例,提供与服务器异步通信的能力,从而使用户从请求/响应的循环中解脱出来.并将Ajax技术应用于内蒙古烟草行业外部网站建设中,研究了内蒙古烟草行业外部网站的Web数据提取流程.  相似文献   

4.
AJAX是最新出现的Web客户端构建技术,它面向异步消息通讯机制,利用它可以构建动态、快速、灵活的Web应用程序。首先分析AJAX的相关技术及其优势,然后提出利用Ajax技术优化Web异步交互的方法,最后通过一个具体的例子说明了Ajax技术在Web异步交互方面的优越性。  相似文献   

5.
为了减少目前Ajax技术滥用带来的网络流量浪费和项目开发难度,设计一系列实验分别对传统网页和应用Ajax技术的网页性能进行测算,实验主要从数据库添加记录和查询记录两个方面展开,由数据库访问时间、注册用户数量、数据流程特征构建数学模型,定量地对Ajax技术在Web站点中的性能进行分析,通过对比得到传统网页与应用Ajax技术网页的性能分析报告,通过模型结合网站实际可以给网站开发人员提供是否应用Ajax技术的决策。  相似文献   

6.
基于Ajax的Web应用技术的研究与实现   总被引:8,自引:0,他引:8  
Web应用在界面易操作性方面的弱点是制约其应用面的重要因素,Ajax技术是为了克服这些缺点而提出的;采用它实现的页面在易操作性上可以做到与桌面应用相同的效果;因此,其应用也逐渐多起来。介绍了Ajax的基本原理并通过在一个Web系统中的具体实践给出了Ajax的具体应用方法,对于一般的Ajax应用开发具有一定的参考价值。  相似文献   

7.
开发Web后台程序的新技术——PHP技术   总被引:5,自引:0,他引:5  
比较了开发Web后台程序几种技术的优缺点 ,介绍了一种新型的CGI编程技术———PHP、PHP技术的特点、如何建立PHP工作环境、用PHP访问Web后台数据库的技术 ,同时给出了具体的访问实例 .  相似文献   

8.
介绍了Ajax的基本原理,并通过一个Web应用的具体实例分析,详细介绍了在.Net环境下如何利用Ajax来构建一个动态和交互性更好的智能Web应用程序。  相似文献   

9.
Ajax是Web应用的一种新方法,利用Ajax技术开发的聊天室系统不仅解决了页面刷新带来的白屏问题,而且能降低服务器和网络传输负荷。文章介绍了Ajax技术的工作原理及它在Asp.Net中的一种简便实现方式,并以聊天室主页面为例描述了Ajax技术在聊天室系统实现过程中的典型应用。  相似文献   

10.
介绍了Ajax的基本原理,并通过一个Web应用的具体实例分析,详细介绍了在.Net环境下如何利用Ajax来构建一个动态和交互性更好的智能Web应用程序.  相似文献   

11.
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   

12.
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   

13.
王慧 《科技信息》2008,(10):240-240
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   

14.
何延凌 《科技信息》2008,(4):258-258
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   

15.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

16.
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.  相似文献   

17.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

18.
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   

19.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

20.
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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