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在位置相关查询(LDQ)中由于用户的移动性和数据的位置相关性，给缓存替换策略带来了新的挑战。
Because of the user's mobility and the location dependency of data, new challenge has been brought to cache replacement strategy for location Dependent Query (LDQ).
通过实验对比，PLAC比其他位置相关缓存替换策略更为有效地提高了缓存命中率，缩短了查询平均响应时间。
The contrast experiments show that the PLAC increases cache hit rate and shortens query average response time more effectively than other location dependent cache replacement strategies.
对于系统的缓存管理和替换策略，SQUID提供了其经典的实现方式。
As for the caching management and replacement policies, SQUID can provide classic realization model.
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