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以Pocket perceptron訓練的上下樓梯辨識穿戴式裝置
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這是我第一次實作有關機器學習的專題,雖然缺點很多,但也為往後打下了一些基礎。
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以Pocket perceptron訓練的上下樓梯辨識穿戴式裝置
1.
Precision Motion Control
Lab National Taiwan Normal University 1 圖形辨認(Pattern Recognition)期末專題 以Pocket Perceptron訓練的 上下樓梯辨識穿戴式裝置 機電工程系碩士班 林高遠
2.
Precision Motion Control
Lab National Taiwan Normal University 2 研究動機
3.
Precision Motion Control
Lab National Taiwan Normal University 3 實驗設計 起點 折返點 Y X Z Y X Z 三軸加速規 ±6G
4.
Precision Motion Control
Lab National Taiwan Normal University 4 自幹的實驗設備 SW, FW, HW 一手包辦
5.
Precision Motion Control
Lab National Taiwan Normal University 5 計劃流程 分析 訓練&學 習 分類 實際應用
6.
Precision Motion Control
Lab National Taiwan Normal University 6 目測資料趨勢 上樓梯--→停止-→下樓梯
7.
Precision Motion Control
Lab National Taiwan Normal University 7 目測資料趨勢 上樓梯--→停止-→下樓梯
8.
Precision Motion Control
Lab National Taiwan Normal University 8 特徵空間分布 本訓練集無法完全線性可分 無法找到任一條線完全切開兩類
9.
Precision Motion Control
Lab National Taiwan Normal University 9 libsvm
10.
Precision Motion Control
Lab National Taiwan Normal University 其他方法? • kNN – 搜尋太久,而且搜尋時間變動大 • Bayes – 找不出能描述資料分布的模型 10
11.
Precision Motion Control
Lab National Taiwan Normal University Perceptron 11 限制:訓練集必須要完全線性可分
12.
Precision Motion Control
Lab National Taiwan Normal University Pocket Perceptron 12
13.
Precision Motion Control
Lab National Taiwan Normal University 何謂 Pocket Perceptron ? 13 「甚至不願離開很爛的對象, 只因為不確定下一個會不會更 好?」 - 女王 ”擺脫妳的爛男人體質”
14.
Precision Motion Control
Lab National Taiwan Normal University 訓練 Pocket Perceptron 14 W(0)=隨機 W=[1秒內加速度峰對峰 , BMI, 標籤] 比照libsvm資料格 式 1 1: 38 2: 21 2 1: 117 2: 23 資料數: 上樓梯 4547 下樓梯 3759
15.
Precision Motion Control
Lab National Taiwan Normal University 訓練 Pocket Perceptron 結果 15 4567 /(上樓梯4547 + 下樓梯 3759)=54% 幾乎只剩50%,與random差不多 →未能容錯, 修正過度 若對樣本排序洗牌,更慘! 45 /(上樓梯4547 + 下樓梯3759)=0.54% →未能容錯, 修正過度
16.
Precision Motion Control
Lab National Taiwan Normal University 訓練 Pocket Perceptron 結果 16 54% → 77% 尚未做交叉訓練 改良 加入觀察期 if(PRcounter>樣本數) { //修正 }
17.
Precision Motion Control
Lab National Taiwan Normal University 訓練 Pocket Perceptron 結果 17 漂亮分割
18.
Precision Motion Control
Lab National Taiwan Normal University 18 計劃流程 分析 訓練&學 習 分類 實際應用
19.
Precision Motion Control
Lab National Taiwan Normal University • 分類器層數不夠多 • 訓練資料不夠多 資料蒐集裝置未模組化 配戴難看,難找受試者 →已改良(如圖) 19 檢討