The efficiency of the algorithm is analyzed and the performance of the proposed algorithm is evaluated via extensive simulation experiments 已经提出的任务调度模型及算法应用到网格环境时，由于网格资源的异构性而导致较低的性能。
In order to shield the heterogeneous which the integration system has to face , many methods have been brought forward , such as database gateway , odbcetc 许多方法被提出，如数据库网关、 odbc等，以期解决信息共享所面临的异构性等问题。
Perhaps the most significant challenges in corporate information management today are the multiplicity , heterogeneity , and geographic distribution of data sources 也许，当今企业信息管理的最大挑战就是数据源的多重性、异构性和地理位置上的分散性。
The heterogeneousness of distributed component models often brings people with the problem that is how to conquer the interworking between different models 分布式组件模型的异构性往往会带来不同模型之间互通性的问题。因此，有必要研究一种通用的互通模型。
The distributed application system with the character of network and different environment is the result of the network as a whole and the parallel processing for the distributed tasks 分布式应用系统具有网络化和异构性的特点，是网络一体化和并行处理分布化的产物。
Web information extraction is a currently lovely research fileld , but the mass , isomer and dynamics of web data is a difficult of web information extraction Web信息提取是当前比较活跃的一个研究课题，但web数据的大量性，异构性和动态性，是web信息提取的一个桎梏。
For lactic acid has one asymmetric carbon atom , the mechanical , physical and biological properties of pla are related to the stereochemistry of lactic acids 合成聚乳酸的初始物质乳酸是有手性的分子，使得聚乳酸的机械和物理性能以及生物学性质与乳酸单体的立体异构性有关。
Because the resources in grid are distributed , heterogeneous and dynamic , the resource management of the gird , especially the task scheduling is still a challenging problem 但由于网格所具有的广域性、动态性、异构性的特点,网格资源管理,特别是作业的调度仍然是目前网格研究的一个难点。
The cluster system maybe consists of heterogeneous computer system , but the current parallel programming environment ca n ' t cross the different operate systems to execute parallel computing 机群系统具有异构性，现有的并行编程环境存在不能跨越异构操作系统的问题，不能跨平台进行并行计算。
In addition , the heterogeneity of the internet makes it difficult to efficiently support video multicast while providing service flexibility to meet a wide range of qos requirements from users 此外，因特网的异构性使得它难于在视频组播中灵活地提供服务，从而满足用户宽范围的服务质量需求。
