CoPenML:基于XML的笔式用户界面构件体系结构

笔式用户界面在许多领域得到了广泛应用，但现有的笔式界面技术不能支持高层次、多领域的可视化界面制作，很难实现面向软件构件的重用．因而提出一个新的解决方案，面向构件的体系结构CoPenML．该方案基于XML语言抽象描述了笔式界面的配置组成．可用于快速生成界面原型及二次开发接口，并且在系统实现级以及场景图级两个层面上实现软件构件的重用．设计了CoPenML的体系结构并给出了界面描述语言规范．最后开发了基于CoPenML的笔式界面制作环境以及相关工具．结果表明该方案对于笔式用户界面制作是十分有效的．

一种基于XML的工作流过程模型的设计和实现

1.引言面对数字经济时代带来的不断增长的竞争压力,企业逐步寻求新的商业运作模式以适应这种变化。随着信息技术和Internet技术的迅猛发展,为适应这种变化提供了条件。企业不再满足于孤立、零散的办公自动化和计算机应用,而是需要综合的、集成化的解决方案。作为一种对常规性事务进行管理、集成的技术,工作流管理系统(Workflow ManagementSystem,WMS)的出现是必然的。如何建立企业业务过程模型是工作流管理系统的核心问题。

基于XML的企业信息集成平台实现及应用

随着企业可获取的信息的大量增长,信息的种类和结构也越来越丰富。从传统的关系数据库,到XML文档以及分布于Web上的大量半结构化的信息。如何把各种不同的数据源统一在一个信息集成平台上,使用户能够高效地,透明地操作各类信息,已经成为一个重要的课题。文章提出的基于XML的企业信息集成框架CII,详细讨论了该框架的设计、实现,以及在国家“九五”重点科技攻关项目:石化应用软件典型示范工程及产品开发上的应用。同时针对工业生产企业中实时数据库的大量使用,该文还专门研究了集成实时数据库信息面临的问题,并提出了相应的解决方案。

Effect of microwave on formation/decomposition of natural gas hydrate

Natural gas hydrate (NGH) reservoirs have been considered as a substantial future clean energy resource and how to recover gas from these reservoirs feasibly and economically is very important. Microwave heating will be taken as a promising method for gas production from gas hydrates for its advantages of fast heat transfer and flexible application. In this work, we investigate the formation/decomposition behavior of natural gas hydrate with different power of microwave (2450MHZ), preliminarily analyze the impact of microwave on phase equilibrium of gas hydrate,and make calculation based on van der Waals-Platteeuw model. It is found that microwave of a certain amount of power can reduce the induction time and sub-cooling degree of NGH formation, e.g., 20W microwave power can lead to a decrease of about 3A degrees C in sub-cooling degree and the shortening of induction time from 4.5 hours to 1.3 hours. Microwave can make rapid NGH decomposition, and water from NGH decomposition accelerates the decomposition of NGH with the decomposition of NGH. Under the same pressure, microwave can increase NGH phase equilibrium temperature. Different dielectric properties of each composition of NGH may cause a distinct difference in temperature in the process of NGH decomposition. Therefore, NGH decomposition by microwave can be affected by many factors.

Investigation on Fe, Mn, Zn, Cu, Pb and Cd fractions in the natural surface coatings sampled and surficial sediments collected in the Songhua River, China

Natural surface coatings sampled (NSCSs) from the surface of shingles and surficial sediments (SSs) in the Songhua River, China were employed to investigate the similarities and difference in fractions of heavy metals (Fe, Mn, Zn, Cu, Pb, and Cd) between NSCSs and SSs using the modified sequential extraction procedure (MSEP). The results show that the differences between NSCSs and SSs in Fe fractions were insignificant and Fe was dominantly present as residual phase (76.22% for NSCSs and 80.88% for SSs) and Fe-oxides phase (20.33% for NSCSs and 16.15% for SSs). Significant variation of Mn distribution patterns between NSCSs and SSs was observed with Mn in NSCSs mainly present in Mn-oxides phase (48.27%) and that in SSs present as residual phase (45.44%). Zn, Cu, Pb and Cd were found dominantly in residual fractions (>48%), and next in solid oxides/hydroxides for Zn, Pb and Cd and in easily oxidizable solids/compounds form for Cu, respectively. The heavy metal distribution pattern implied that Fe/Mn oxides both in NSCSs and SSs were more important sinks for binding and adsorption of Zn, Pb and Cd than organic matter (OM), and inversely, higher affinity of Cu to OM than Fe/Mn oxides in NSCSs and SSs was obtained. Meanwhile, it was found that the distributions of heavy metals in NSCSs and SSs were similar to each other and the pseudo-total concentrations of Zn, Cu, Pb and Cd in NSCSs were greater than those in SSs, highlighting the more importance for NSCSs than SSs in controlling behaviours of heavy metals in aquatic environments.

Hybrid waveguide-plasmon resonances in gold pillar arrays on top of a dielectric waveguide

We propose a hybrid waveguide-plasmon system consisting of gold pillar arrays on top of a dielectric waveguide. The formation of extraordinary transmissions induced by the hybrid waveguide-plasmon resonances is investigated by rigorous coupled-wave analysis. The characteristics of the hybrid resonances can be predicted by introducing the photonic crystal slab theory. Extremely narrow absorption peaks and the electromagnetically induced transparency-like optical property are demonstrated in our hybrid system. (C) 2010 Optical Society of America

smoothing document language model with local word graph

ACM SIGIR; ACM SIGWEB