为了实现 Web 内部分布、异构数据之间的互操作和全局操作,必须对不同数据源进行集成。在分析了各集成模式的优缺点之后,提出了一种基于 XML 的虚拟化的 Web 数据集成方法。该方法采用 XML 作为集成数据的公共数据格式,通过在不同的数...为了实现 Web 内部分布、异构数据之间的互操作和全局操作,必须对不同数据源进行集成。在分析了各集成模式的优缺点之后,提出了一种基于 XML 的虚拟化的 Web 数据集成方法。该方法采用 XML 作为集成数据的公共数据格式,通过在不同的数据源和 XML 文档数据模型之间建立映射,实现了一种虚拟化的数据集成方法。这种数据集成方法简化了 Web 数据集成的实现。最后通过一个实例方案验证了方法的可行性和有效性。展开更多
A model-exchange method based on feature between isomerous CAD systems is put forward in this paper.In this method,CAD model information is accessed at both feature and geometry levels and converted according to stand...A model-exchange method based on feature between isomerous CAD systems is put forward in this paper.In this method,CAD model information is accessed at both feature and geometry levels and converted according to standard feature opera- tion.The feature information including feature tree,dimensions and constraints,which will be lost in traditional data conver- sion,as well as geometry are converted completely from source CAD system to destination one.So the transferred model can be edit- ed through feature operation,which cannot be implemented by general model-exchange interface.展开更多
文摘为了实现 Web 内部分布、异构数据之间的互操作和全局操作,必须对不同数据源进行集成。在分析了各集成模式的优缺点之后,提出了一种基于 XML 的虚拟化的 Web 数据集成方法。该方法采用 XML 作为集成数据的公共数据格式,通过在不同的数据源和 XML 文档数据模型之间建立映射,实现了一种虚拟化的数据集成方法。这种数据集成方法简化了 Web 数据集成的实现。最后通过一个实例方案验证了方法的可行性和有效性。
基金Supported by Science & Technology Sponsoring Project of Ministry of Education(105161)
文摘A model-exchange method based on feature between isomerous CAD systems is put forward in this paper.In this method,CAD model information is accessed at both feature and geometry levels and converted according to standard feature opera- tion.The feature information including feature tree,dimensions and constraints,which will be lost in traditional data conver- sion,as well as geometry are converted completely from source CAD system to destination one.So the transferred model can be edit- ed through feature operation,which cannot be implemented by general model-exchange interface.
