目的：研究不同步速下行走时的能量消耗水平，进而推导出根据计步器参数推算步行能耗和一日总能耗的方程，以期为进一步开发计步器功能提供参考依据。
The purpose of this study was to study energy expenditure of different walking speed in order to get formulas which can calculate energy expenditure of walking and daily physical activity.
采用更精确的分析方法，给出使得网络总能量消耗最小，网络寿命最长时的缓冲区位置与能量发射级别参数的选取方法。
Based on this, the best energy transmitting power which can make the largest network life is gained, and a policy is put forward to prolong network life and keep a high rate of data collection.
采用更精确的分析方法，给出使得网络总能量消耗最小，网络寿命最长时的缓冲区位置与能量发射级别参数的选取方法。
Based on this, the best energy transmitting power which can make the largest network life is gained, and a policy is put forward to prolong network life and keep a high rate of data collection.
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