共享内存允许多个进程将它们的部分虚地址映射到一个公用的内存区域。
Shared memory allows multiple processes to map a portion of their virtual address to a common memory region.
为了改善数字地图图幅自动接边算法在处理大区域甚至全球范围的大数据量图幅接边时效率低的问题，提出了基于矢量id映射的“虚拼接”算法。
To improve the efficiency of automatic maps edge matching of massive digital map data of great regions even global ones, virtual stitching algorithm based on vector ID mapping is presented.
另外，硬件虚存机制可以对内存部分区域提供写保护，以防止代码和数据被其它恶意的应用程序所篡改。
Also, the hardware virtual memory mechanisms allow areas of memory to be protected against writing. This protects code and data from being overwritten by rogue applications.
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