本项目为服务器后端，安卓前端在 https://github.com/sqyon/CellPhoneActivityRecognitionAPP
使用安卓手机的传感器获取加速度与重力加速度，并计算出水平与垂直加速度，提取特征后使用决策树进行分类。
https://github.com/mmalekzadeh/motion-sense
使用tsfresh提取时间序列特征，使用卡方检验获取前k个最重要的特征，并使用这些特征进行训练
手机端UPD发包到服务器进行计算输出，并回传手机
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Collect sensor data from Android cell phone.Using accelerometers and gravimeters to calculate horizontal and vertical accelerations. Use decision tree as classifier
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sqyon/CellPhoneActivityRecognition
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Collect sensor data from Android cell phone.Using accelerometers and gravimeters to calculate horizontal and vertical accelerations. Use decision tree as classifier
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