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    • 3. 发明授权
    • Method and mechanism for performing region query using hierarchical grids
    • 使用分层网格执行区域查询的方法和机制
    • US08413093B1
    • 2013-04-02
    • US12978302
    • 2010-12-23
    • Guruprasad G. RaoMark HahnLaurent Volpe
    • Guruprasad G. RaoMark HahnLaurent Volpe
    • G06F17/50
    • G06F17/5031G06F2217/78
    • Disclosed is an improved approach for managing, tracking, and querying hierarchical data in layouts. According to some aspects, hierarchical grids are employed utilizing a scheme that organizes physical objects into a set of gradually refined grids that avoids the need to maintain duplicates while enhancing the desirable characteristics of existing schemes, including fast query times, fast data structure initialization and reduced memory footprint. Each grid-cell may be further partitioned into sub-containers to more efficiently provide space pruning during query operations. According to one approach, structures maintained to track existence of objects in a descendent hierarchy.
    • 公开了一种用于在布局中管理,跟踪和查询分层数据的改进方法。 根据一些方面,使用将物理对象组织成一组逐渐改进的网格的方案来采用分层网格,避免了维护重复的需要,同时增强了现有方案的期望特性,包括快速查询时间,快速数据结构初始化和减少 内存占用 可以将每个网格单元进一步划分成子容器,以在查询操作期间更有效地提供空间修剪。 根据一种方法,维护的结构跟踪后代层级中对象的存在。
    • 4. 发明授权
    • Method and mechanism for maintaining existence information for electronic layout data
    • 维护电子布局数据存在信息的方法和机制
    • US08407228B1
    • 2013-03-26
    • US12748196
    • 2010-03-26
    • Mark HahnLaurent VolpeGuruprasad G. Rao
    • Mark HahnLaurent VolpeGuruprasad G. Rao
    • G06F17/30
    • G06F17/30589
    • Disclosed is an improved approach for managing, tracking, and querying hierarchical data in layouts. According to some aspects, hierarchical grids are employed utilizing a scheme that organizes physical objects into a set of gradually refined grids that avoids the need to maintain duplicates while enhancing the desirable characteristics of existing schemes, including fast query times, fast data structure initialization and reduced memory footprint. Each grid-cell may be further partitioned into sub-containers to more efficiently provide space pruning during query operations. According to one approach, structures maintained to track existence of objects in a descendent hierarchy.
    • 公开了一种用于在布局中管理,跟踪和查询分层数据的改进方法。 根据一些方面,使用将物理对象组织成一组逐渐改进的网格的方案来采用分层网格,避免了维护重复的需要,同时增强了现有方案的期望特性,包括快速查询时间,快速数据结构初始化和减少 内存占用 可以将每个网格单元进一步划分成子容器,以在查询操作期间更有效地提供空间修剪。 根据一种方法,维护的结构跟踪后代层级中对象的存在。
    • 8. 发明授权
    • Method and mechanism for implementing region query using hierarchical grids
    • 使用分层网格实现区域查询的方法和机制
    • US08413087B1
    • 2013-04-02
    • US12748172
    • 2010-03-26
    • Guruprasad G. RaoMark HahnLaurent Volpe
    • Guruprasad G. RaoMark HahnLaurent Volpe
    • G06F17/50
    • G06F17/5031G06F2217/78
    • Disclosed is an improved approach for managing, tracking, and querying hierarchical data in layouts. According to some aspects, hierarchical grids are employed utilizing a scheme that organizes physical objects into a set of gradually refined grids that avoids the need to maintain duplicates while enhancing the desirable characteristics of existing schemes, including fast query times, fast data structure initialization and reduced memory footprint. Each grid-cell may be further partitioned into sub-containers to more efficiently provide space pruning during query operations. According to one approach, structures maintained to track existence of objects in a descendent hierarchy.
    • 公开了一种用于在布局中管理,跟踪和查询分层数据的改进方法。 根据一些方面,使用将物理对象组织成一组逐渐改进的网格的方案来采用分层网格,避免了维护重复的需要,同时增强了现有方案的期望特性,包括快速查询时间,快速数据结构初始化和减少 内存占用 可以将每个网格单元进一步划分成子容器,以在查询操作期间更有效地提供空间修剪。 根据一种方法,维护的结构跟踪后代层级中对象的存在。