用XML表示和发布图文混合信息

可扩展标识语言XML以其合理的数据组织结构和可扩展的特性,广泛适合于表示各类复杂的数据形式。利用XML表示和发布图文混合信息具有很重要的实际价值。基于实例介绍了使用XML表示和发布图文混合信息内容的方法和过程。     

标准并行接口汉字热敏微型打印机的实现

介绍标准并行接口汉字热敏微型打印机的电路原理、标准汉字库芯片汉字点阵的结构和数据格式、读汉字库和点阵代码调理的程序设计算法。     

A QoS-aware composition method supporting cross-platform service invocation in cloud environment

With the increasing popularity of cloud computing technologies, more and more service composition processes are enacted and executed in could environment. Compared with the various and approximately infinite application requirements from end users, the web services held by a cloud platform are usually limited. Therefore, it is often a challenging effort to develop a service composition, in such a situation that only part of the functional qualified candidate services could be found inside a cloud platform. In this situation, the absent services will be invocated in a cross-platform way outside the cloud platform. In view of this challenge, a QoS-aware composition method is investigated for supporting cross-platform service invocation in cloud environment. Furthermore, some experiments are deployed to evaluate the method presented in this paper.     

Layered Working-Set Trees

The working-set bound [Sleator and Tarjan in J. ACM 32(3), 652–686, 1985] roughly states that searching for an element is fast if the element was accessed recently. Binary search trees, such as splay trees, can achieve this property in the amortized sense, while data structures that are not binary search trees are known to have this property in the worst case. We close this gap and present a binary search tree called a layered working-set tree that guarantees the working-set property in the worst case. The unified bound [B?doiu et al. in Theor. Comput. Sci. 382(2), 86–96, 2007] roughly states that searching for an element is fast if it is near (in terms of rank distance) to a recently accessed element. We show how layered working-set trees can be used to achieve the unified bound to within a small additive term in the amortized sense while maintaining in the worst case an access time that is both logarithmic and within a small multiplicative factor of the working-set bound.     

宝泉抽水蓄能电厂AGC/AVC的应用

抽水蓄能电厂自动发电控制（AGC）/自动电压控制（AVC）的总体要求是根据电网有功潮流和电网电压的变化,及时调整机组有功出力和无功出力,保证电网运行的安全性和经济性。文中从AGC/AVC系统结构、数据交换、有功负荷分配策略、电压控制和整体功能的实现方式等方面,介绍了宝泉抽水蓄能电厂AGC/AVC的特点,实现的技术方式、约束条件和特殊功能。     

CSP结晶器内钢液流动及凝固的数值模拟

应用数值模拟方法,建立CSP漏斗型结晶器内钢液流动及凝固传热耦合模型。针对结晶器内铸坯角部受到强冷的特点,对结晶器内热流密度采用修正方程进行计算,分析热流密度修正系数对铸坯凝固坯壳表面温度计算精度的影响。通过比较不同拉坯速率下结晶器内钢液凝固的特点,研究凝固坯壳对结晶器内钢液流动行为的影响。结果表明,采用热流密度修正系数后,铸坯凝固坯壳角部温度的计算值与实际情况更相符;提高拉坯速率可使铸坯凝固坯壳厚度减小;拉坯速率较大时凝固坯壳厚度随铸坯距弯月面距离的增大基本呈线性增长,拉坯速率为3m/min时,凝固坯壳在生长过程中厚度的增长有短暂的停滞现象;凝固坯壳对钢液流动的影响较大,主要是由钢液有效流动区域减少及两相区额外动量阻损造成的。     

关于强化政工干部培训和管理的思考

介绍了国企政工干部培训和管理中存在的问题和成因,并有针对性地提出了加强政工干部工作队伍的对策措施。     

TiO2对烧成镁钙砖烧结性能的影响

研究了两种晶型的TiO2(锐钛矿型和金红石型)作为添加剂对烧成镁钙砖烧结性的影响.结果表明,两种晶型的TiO2都能显著促进镁钙砖的烧结,其中以锐钛矿晶型为添加剂的效果好于金红石型的.XRD分析结果表明,TiO2与CaO反应生成了CaTiO3,这是加入TiO2使镁钙砖烧结性变好的主要原因.     

山东蓝宝石的色源和改色研究

报道了山东蓝宝石的ＸＰＳ，ＳＩＭＳ的测试结果，基于成份分析，光谱测试数据及对改色处理结果的分析，作出了关于山东蓝宝石的色源解释。山东蓝－宝石含铁量明显偏高，Ｆｅ＾２＋－Ｔｉ＾４＋离子间的电荷转移及Ｆｅ＾２＋，Ｆｅ＾２＋离子对的电子跃迁这两种机制的迭加，是造成其色深，失透的基本     

Web应用程序安全设计探析

Web应用程序为结构设计人员、设计人员和开发人员提出了一系列复杂的安全问题。最安全、最有能力抵御攻击的Web应用程序是那些应用安全思想构建的应用程序。在设计初始阶段,应该使用可靠的体系结构和设计方法,同时要结合考虑程序部署以及企业的安全策略。本文提供了一系列安全的体系结构和设计方法,并按照常见的应用程序漏洞类别进行了组织。这些方法将对建设安全可靠的网站提供有益的帮助。