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通过修改经典的最近邻查询中距离度量的定义，将移动对象轨迹上最近邻查询和区域查询结合起来进行研究是查询处理算法上一次有益的尝试。
Modifying the classical distance metrics definition in nearest neighbor search, it's a beneficial attempt in querying process that research in combining nearest neighbor query with range query.
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