Let's D↓ve into the ocean of knowledge!
diff --git a/search/search_index.json b/search/search_index.json
index 8b1194c..b033755 100755
--- a/search/search_index.json
+++ b/search/search_index.json
@@ -1 +1 @@
-{"config":{"lang":["en"],"separator":"[\\s\\-]+","pipeline":["stopWordFilter"]},"docs":[{"location":"","title":"freeDomD\u2193ve","text":"
\u4e00\u99ac\u7576\u5148\uff0c\u842c\u99ac\u7121\u5149\u3002 Eclipse the first, the rest nowhere.
\u7b80\u5355\u7684\u7f51\u7ad9\uff0c\u653e\u4e00\u70b9\u5b66\u4e60\u7b14\u8bb0\uff0c\u653e\u4e00\u70b9\u751f\u6d3b\u5fc3\u5f97\u3002
A website recording study and life.
"},{"location":"#about-me","title":"About me","text":"
ID: DDKing Major: Computer Science
"},{"location":"#lastest-update","title":"Lastest Update","text":"
Let's D\u2193ve into the ocean of knowledge!
"},{"location":"discussions/","title":"Discussion","text":""}]}
\ No newline at end of file
+{"config":{"lang":["en"],"separator":"[\\s\\-]+","pipeline":["stopWordFilter"]},"docs":[{"location":"","title":"freeDomD\u2193ve","text":"
\u4e00\u99ac\u7576\u5148\uff0c\u842c\u99ac\u7121\u5149\u3002 Eclipse the first, the rest nowhere.
\u7b80\u5355\u7684\u7f51\u7ad9\uff0c\u653e\u4e00\u70b9\u5b66\u4e60\u7b14\u8bb0\uff0c\u653e\u4e00\u70b9\u751f\u6d3b\u5fc3\u5f97\u3002
A website recording study and life.
"},{"location":"#about-me","title":"About me","text":"
ID: DDKing Major: Computer Science
"},{"location":"#lastest-update","title":"Lastest Update","text":"
- Jan. 21st \u2003 CS231N - Image Classifier
Let's D\u2193ve into the ocean of knowledge!
"},{"location":"discussions/","title":"Discussion","text":""},{"location":"ScientificResearch/CS231N/L2/","title":"\u7b2c\u4e8c\u8bb2 \u2014\u2014 \u56fe\u50cf\u5206\u7c7b\u5668","text":""},{"location":"ScientificResearch/CS231N/L2/#_2","title":"\u56fe\u50cf\u5206\u7c7b\u5668\u7684\u4e24\u4e2a\u6b65\u9aa4","text":"
-
\u8bad\u7ec3\u6a21\u578b \u2003\u2003\u56fe\u50cf\u7684\u8bc6\u522b\u4e0d\u662f\u51ed\u7a7a\u8fdb\u884c\u7684\uff0c\u5c31\u50cf\u8ba1\u7b97\u673a\u7684\u7b97\u6cd5\u6d41\u7a0b\u4e00\u6837\uff0c\u56fe\u50cf\u4f5c\u4e3a\u7b97\u6cd5\u7684\u8f93\u5165\uff0c\u7c7b\u522b\u4f5c\u4e3a\u7b97\u6cd5\u7684\u8f93\u51fa\uff0c\u6574\u4e2a\u7b97\u6cd5\u672c\u8eab\u8fd9\u4e2a\u9ed1\u7bb1\u5c31\u662f\u6211\u4eec\u9700\u8981\u8bad\u7ec3\u7684\u4e1c\u897f\uff0c\u6211\u4eec\u9700\u8981\u627e\u5230\u4e00\u4e2a\u6a21\u578b\uff0c\u8ba9\u5b83\u7684\u8f93\u5165\u8f93\u51fa\u6620\u5c04\u5173\u7cfb\u548c\u56fe\u50cf\u8bc6\u522b\u8fc7\u7a0b\u76f8\u543b\u5408\u3002
-
\u9884\u6d4b\u56fe\u50cf \u2003\u2003\u6267\u884c\u9884\u6d4b\u56fe\u50cf\u7684\u8fc7\u7a0b\uff0c\u5c31\u662f\u4f7f\u7528\u6211\u4eec\u627e\u5230\u7684\u6a21\u578b\uff0c\u8fdb\u884c\u8f93\u5165\u3001\u5904\u7406\u548c\u8f93\u51fa\u7684\u8fc7\u7a0b\u3002\u5c31\u50cf\u54c8\u5e0c\u7b97\u6cd5\u628a\u539f\u6570\u636e\u5904\u7406\u6210\u54c8\u5e0c\u503c\u4e00\u6837\uff0c\u901a\u8fc7\u6a21\u578b\uff0c\u539f\u56fe\u50cf\u7684\u50cf\u7d20\u9635\u5217\u7ecf\u8fc7\u8ba1\u7b97\u53d8\u6210\u4e00\u4e9b\u5206\u6570\u503c\uff0c\u7136\u540e\u6211\u4eec\u901a\u8fc7\u6bd4\u8f83\u6bcf\u4e2a\u7c7b\u578b\u7684\u5f97\u5206\u6765\u8bc4\u4ef7\u8fd9\u4e2a\u56fe\u50cf\u5e94\u8be5\u5c5e\u4e8e\u54ea\u4e2a\u7c7b\u522b\u3002
\u4e00\u70b9\u8054\u60f3
\u2003\u2003\u8fd9\u5176\u5b9e\u5f88\u6709\u610f\u601d\uff0c\u5c31\u50cf\u5b66\u6821\u7ed9\u6211\u4eec\u5206\u53d1\u6d4b\u8bd5\u8bd5\u5377\u3001\u6539\u5377\u6253\u5206\u6765\u7ed9\u6211\u4eec\u8bc4\u4ef7\u5b66\u4e60\u6c34\u5e73\u4e00\u6837\uff0c\u6211\u4eec\u7efc\u5408\u673a\u5668\u6bcf\u4e00\u5757\u50cf\u7d20\uff0c\u7ed9\u5b83\u4eec\u6765\u6253\u5206\uff0c\u6700\u540e\u5f97\u51fa\u5b83\u5e94\u8be5\u5c5e\u4e8e\u54ea\u4e00\u4e2a\u7c7b\u522b\u3002\u5c31\u50cf\u4f60\u653f\u6cbb\u8003\u4e8690\u5206\uff0c\u800c\u7269\u7406\u53ea\u670960\u5206\uff0c\u4f60\u4f1a\u4e0b\u610f\u8bc6\u5224\u65ad\u4f60\u9002\u5408\u5b66\u6587\u79d1\u800c\u4e0d\u9002\u5408\u5b66\u7406\u79d1\u3002 \u2003\u2003\u4f46\u662f\uff0c\u6211\u4eec\u90fd\u77e5\u9053\u8fd9\u53ea\u662f\u4e00\u4e2a\u6982\u7387\u5224\u65ad\u3002\u5f71\u54cd\u8003\u8bd5\u5206\u6570\u7684\u56e0\u7d20\u592a\u591a\u4e86\uff0c\u6211\u4eec\u4e0d\u4f1a\u901a\u8fc7\u4ec5\u4ec5\u4e00\u6b21\u8003\u8bd5\u6765\u51b3\u5b9a\u4e00\u4e2a\u4eba\u662f\u5426\u9002\u5408\u5b66\u4e60\u6587\u79d1\u6216\u8005\u5b66\u4e60\u7406\u79d1\u3002\u5bf9\u56fe\u50cf\u4e5f\u4e00\u6837\uff0c\u5f53\u56fe\u50cf\u5bf9\u4e8e\u201c\u732b\u201d\u5f97\u5206\u6700\u9ad8\u7684\u65f6\u5019\uff0c\u5b83\u5927\u6982\u7387\u662f\u732b\uff0c\u4f46\u662f\u8fd9\u5fc5\u7136\u662f\u4e0d\u80fd\u767e\u5206\u767e\u5730\u786e\u5b9a\u7684\u3002 \u2003\u2003\u5c3d\u7ba1\u5982\u6b64\uff0c\u4f46\u5c31\u50cf\u7269\u7406\u6a21\u578b\u4e2d\u4f7f\u7528\u4e86\u975e\u5e38\u591a\u7684\u4e00\u9636\u8fd1\u4f3c\u4e5f\u80fd\u51c6\u786e\u9884\u6d4b\u81ea\u7136\u754c\u7684\u53d8\u5316\uff0c\u5bf9\u4e8e\u673a\u5668\uff0c\u4e5f\u53ef\u4ee5\u6709\u8fd9\u6837\u7684\u8bef\u5dee\u548c\u8fd1\u4f3c\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5f00\u53d1\u8bad\u7ec3\u543b\u5408\u7387\u66f4\u9ad8\u7684\u6a21\u578b\uff0c\u8fd9\u6837\u8ba9\u9519\u8bef\u964d\u5230\u53ef\u4ee5\u5bb9\u8bb8\u7684\u8303\u56f4\uff0c\u8ba9\u5b83\u505a\u51fa\u9ad8\u6982\u7387\u7684\u9884\u6d4b\uff0c\u8fd9\u6837\u8fd9\u4e2a\u6a21\u578b\u5c31\u6bd4\u8f83\u53ef\u4fe1\u4e86\u3002\u8bf4\u4e0d\u5b9a\u6709\u4e00\u5929\uff0c\u673a\u5668\u53ef\u4ee5\u505a\u5230\u6bd4\u4eba\u773c\u8bc6\u522b\u66f4\u7cbe\u51c6\u3002
"},{"location":"ScientificResearch/CS231N/L2/#l1","title":"L1\u8ddd\u79bb\uff08\u66fc\u54c8\u987f\u8ddd\u79bb\uff09","text":"
\u2003\u2003\u6211\u4eec\u521a\u521a\u8bb2\u5230\uff0c\u5bf9\u56fe\u50cf\u8fdb\u884c\u5206\u7c7b\uff0c\u6700\u91cd\u8981\u7684\u662f\u5bf9\u56fe\u50cf\u786e\u5b9a\u4e00\u4e2a\u201c\u6253\u5206\u6807\u51c6\u201d\uff0c\u5f97\u5230\u8fd9\u4e2a\u56fe\u50cf\u5728\u6bcf\u4e00\u4e2a\u5206\u7c7b\u7684\u5206\u6570\uff0c\u65b9\u4fbf\u540e\u7eed\u7684\u9009\u62e9\u3002L1\u8ddd\u79bb\u5c31\u662f\u4e00\u4e2a\u7ecf\u5178\u7684\u6253\u5206\u6807\u51c6\u3002
L1\u8ddd\u79bb\u516c\u5f0f\uff1a $$ L_1 = \\sum_{p_{ij} \\in img}{|p_{ij}-q_{ij}|},q_{ij} = \\text{constant} $$
\u2003\u2003\u5728\u4e0a\u9762\u7684\u516c\u5f0f\u4e2d\uff0c\\(q\\)\u662f\u6211\u4eec\u9884\u5148\u8bbe\u7f6e\u597d\u7684\u5e38\u6570\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u5df2\u77e5\u7684\u56fe\u50cf\uff0c\u6211\u4eec\u77e5\u9053\u8fd9\u4e2a\u56fe\u50cf\u5bf9\u5e94\u7740\u4ec0\u4e48\uff0c\u800cL1\u8ddd\u79bb\u5c31\u662f\u628a\u73b0\u5728\u6d4b\u8bd5\u7684\u56fe\u50cf\u548c\u5df2\u77e5\u56fe\u50cf\u7684\u50cf\u7d20\u503c\u4e00\u4e00\u5bf9\u5e94\u76f8\u51cf\uff0c\u7136\u540e\u8fdb\u884c\u6c42\u548c\uff0c\u5c31\u50cf\u4e0b\u9762\u8fd9\u4e2a\u56fe\u663e\u793a\u7684\u4e00\u6837\u3002
\u2003\u2003\u6211\u4eec\u628a\u8fd9\u4e2a\u8ba1\u7b97\u51fa\u6765\u7684\u4e1c\u897f\u53eb\u505a\u201c\u8ddd\u79bb\u201d\uff0c\u662f\u56e0\u4e3a\u5b83\u4ece\u67d0\u79cd\u89d2\u5ea6\u4e0a\u786e\u5b9e\u53cd\u6620\u4e86\u6d4b\u8bd5\u56fe\u50cf\u548c\u5df2\u77e5\u56fe\u50cf\u7684\u5dee\u5f02\uff0c\u4ece\u62bd\u8c61\u7684\u89d2\u5ea6\u6765\u770b\u5c31\u662f\u4e00\u79cd\u8ddd\u79bb\uff0c\u800c\u4e14\u5b83\u7b26\u5408\u5dee\u5f02\u8d8a\u5927\uff0c\u8ddd\u79bb\u8d8a\u8fdc\u7684\u76f4\u89c2\u3002
"},{"location":"ScientificResearch/CS231N/L2/#_3","title":"\u6a21\u578b\u8bad\u7ec3\u2014\u2014\u8ddd\u79bb\u77e9\u9635","text":"
\u2003\u2003\u56e0\u6b64\uff0c\u53ef\u4ee5\u8bbe\u60f3\uff0c\u5982\u679c\u6211\u4eec\u624b\u5934\u6709\\(N\\)\u4e2a\u5df2\u77e5\u7684\u5bf9\u8c61\uff0c\u540c\u65f6\u6709\\(M\\)\u4e2a\u9700\u8981\u9a8c\u8bc1\u7684\u56fe\u50cf\uff0c\u6211\u4eec\u4e00\u4e00\u8ba1\u7b97\u5b83\u4eec\u4e4b\u95f4\u8ddd\u79bb\uff0c\u4e8e\u662f\u6211\u4eec\u5c31\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a \\(M\\)\u884c\\(N\\)\u5217\u7684\u77e9\u9635\uff0c\u6211\u4eec\u5c06\u5b83\u79f0\u4f5c\u8ddd\u79bb\u77e9\u9635\uff08distance matrix\uff09\uff0c\u901a\u8fc7\u6bd4\u8f83\u6bcf\u4e00\u884c\u7684\u8ddd\u79bb\uff0c\u5c31\u53ef\u4ee5\u5f97\u51fa\u6bcf\u4e00\u4e2a\u9a8c\u8bc1\u56fe\u50cf\u7684\u9884\u6d4b\u7c7b\u578b\u3002
"},{"location":"ScientificResearch/CS231N/L2/#nn","title":"\u6700\u8fd1\u90bb\u5c45\u7b97\u6cd5(NN)","text":"
\u2003\u2003\u6839\u636e\u76f4\u89c2\u611f\u53d7\uff0c\u6211\u4eec\u4e0d\u59a8\u505a\u51fa\u8fd9\u6837\u7684\u7ed3\u8bba\uff0c\u6211\u4eec\u8ba4\u4e3a\u5982\u679c\u4e24\u4e2a\u56fe\u50cf\u7684L1\u8ddd\u79bb\u8d8a\u5c0f\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u56fe\u50cf\u5c31\u8d8a\u76f8\u4f3c\u3002\u5bf9\u4e8e\u6d4b\u8bd5\u56fe\u50cf\uff0c\u6211\u4eec\u8ba1\u7b97\u5b83\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u5df2\u77e5\u56fe\u50cf\u7684\u5df2\u6709\u8ddd\u79bb\uff0c\u770b\u770b\u5b83\u548c\u8c01\u8d70\u5f97\u66f4\u8fd1\uff0c\u5c31\u8ddf\u8c01\u5f52\u4e3a\u540c\u4e00\u7c7b\u2014\u2014\u8fd9\u5c31\u662f\u6700\u8fd1\u90bb\u5c45\uff08Nearest Neighbour\uff09\u7b97\u6cd5\u3002
NN.py
import numpy as np\n\nclass NearestNeighbour:\n def __init__(self):\n pass\n\n def train(self,X,y):\n \"\"\" \u6ce8\u610f\uff0c\u6211\u4eec\u4e3a\u4e86\u5b58\u50a8\u7684\u65b9\u4fbf\uff0c\u628a\u56fe\u50cf\u7684\u6bcf\u4e00\u884c\u62fc\u63a5\u8d77\u6765\uff0c\u8fd9\u6837\u5c31\u628a\u4e8c\u7ef4\u7684\u56fe\u50cf\u6570\u636e\u8f6c\u5316\u6210\u4e86\u4e00\u7ef4\u6765\u5b58\u50a8\u3002 \"\"\"\n # X\u662f\u4e00\u4e2aM\u884cN\u5217\u7684\u4e8c\u7ef4\u6570\u7ec4\uff0cM\u4ee3\u8868\u5df2\u77e5\u56fe\u7684\u4e2a\u6570\uff0cN\u4ee3\u8868\u6bcf\u4e2a\u56fe\u7684\u5927\u5c0f \n # y\u662f\u4e00\u4e2a\u5927\u5c0f\u4e3aM\u7684\u4e00\u7ef4\u6570\u7ec4\uff0c\u5b58\u50a8\u7684\u662f\u6bcf\u4e00\u4e2a\u56fe\u50cf\u6240\u5bf9\u5e94\u7684\u7c7b\u522b\n self.Xtr = X\n self.ytr = y\n\n def predict(self,X):\n # \u6b64\u5904X\u662f\u4e00\u4e2aK\u884cN\u5217\u7684\u4e8c\u7ef4\u6570\u7ec4\uff0cK\u4ee3\u8868\u9700\u8981\u6d4b\u8bd5\u56fe\u50cf\u7684\u4e2a\u6570\uff0cN\u4ee3\u8868\u6bcf\u4e2a\u56fe\u7684\u5927\u5c0f\uff0c\u8fd9\u4e2aN\u5fc5\u987b\u548cXtr\u4e2d\u7684N\u5339\u914d\n num_test = X.shape[0]\n Ypred = np.zeros(num_test, dtype = self.ytr.dtype) # \u521d\u59cb\u5316\u7c7b\u578b\n\n for i in xrange(num_test):\n # \u8ba1\u7b97 L1\u8ddd\u79bb\u77e9\u9635\n distances = np.sum(np.abs(self.Xtr - X[i,:]), axis = 1)\n # \u5bfb\u627e\u8ddd\u79bb\u6700\u5c0f\u5bf9\u5e94\u56fe\u50cf\u7684\u4e0b\u6807\n min_index = np.argmin(distances)\n # \u4e0b\u6807\u6620\u5c04\u627e\u5230\u5bf9\u5e94\u5206\u7c7b\n Ypred[i] = self.ytr[min_index]\n\n return Yred\n
\u4e00\u4e9b\u5173\u4e8e\u4ee3\u7801\u7684\u95ee\u9898\u548c\u89e3\u7b54
\u4e00. \u7b2c16\u884c\u7684 X.shape[0]
\u662f\u4ec0\u4e48\u610f\u601d\uff1f X.shape
\u662f\u4e00\u4e2anumpy\u7684\u51fd\u6570\uff0c\u5176\u4e2dX.shape[N]
\u4ee3\u8868\u7684\u662f\u8bfb\u53d6\u53d8\u91cfX\u7b2cN-1\u4e2a\u7ef4\u5ea6\u7684\u5927\u5c0f\uff0c\u8fd9\u91cc\u7684X.shape[0]
\u5c31\u662f\u8bfb\u53d6\u884c\u6570\uff0c\u5982\u679c\u662fX.shape[1]
\u8bfb\u53d6\u7684\u5c31\u662f\u5217\u6570\u3002 \u2003\u2003\u66f4\u8fdb\u4e00\u6b65\u5730\uff0c\u5982\u679c\u62d3\u5c55\u5230\u66f4\u9ad8\u7ef4\u5ea6\u7684\u60c5\u51b5\uff08\u6211\u4eec\u5f88\u591a\u65f6\u5019\u90fd\u4f1a\u4f7f\u7528\u591a\u7ef4\u6570\u7ec4\uff09\uff0c.shape[]\u51fd\u6570\u5c31\u4f1a\u975e\u5e38\u65b9\u4fbf\u3002\u6bd4\u5982\u5bf9\u4e8e\u4e00\u4e2anumpy\u7684array\u53d8\u91cf\uff0c\u5982\u679c\u5b83\u662f\u4e00\u4e2a\u7c7b\u4f3cX[A][B][C][D]
\u56db\u7ef4\u6570\u7ec4\uff0c\u7531\u4e8epython\u5bf9\u89c4\u5b9a\u53d8\u91cf\u7684\u6a21\u7cca\u5316\uff0c\u6211\u4eec\u4e0d\u77e5\u9053ABCD\u7684\u5177\u4f53\u503c\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u904d\u5386X.shape[0] ~ X.shape[3]
\u6765\u5f97\u5230 A ~ D\u3002\u7279\u6b8a\u5730\uff0c\u5c31\u50cf-1\u5728\u6570\u7ec4\u4e2d\u7684\u4f7f\u7528\u4e00\u6837\uff0c\u5982\u679c\u6211\u4eec\u4f7f\u7528X.shape[-1]
\uff0c\u5b83\u4f1a\u8fd4\u56de\u6700\u540e\u4e00\u4e2a\u7ef4\u5ea6\u7684\u5927\u5c0f\uff0c\u4e5f\u5c31\u662fX.shape[3]
\u3002 \u4e8c\u3001\u7b2c17\u884c\u7684np.zeros()
\u7528\u6765\u505a\u4ec0\u4e48\uff1f \u2003\u2003\u5c31\u50cf\u6211\u4eec\u5728C\u8bed\u8a00\u4e2d\u9700\u8981\u5b9a\u4e49\u53d8\u91cf\u5e76\u4e14\u8d4b\u521d\u503c\u4e00\u6837\uff0c\u5728python\u4e2d\u6211\u4eec\u540c\u65f6\u9700\u8981\u8fd9\u6837\u505a\uff0c\u4f46\u662fpython\u4f1a\u901a\u8fc7\u4f60\u8d4b\u7684\u503c\u6765\u81ea\u52a8\u4e3a\u53d8\u91cf\u5224\u65ad\u7c7b\u578b\uff0c\u6240\u4ee5\u7b80\u5316\u4e86\u53d8\u91cf\u7684\u5b9a\u4e49\u6b65\u9aa4\u3002array\u662fnumpy\u5e93\u4e2d\u7684\u4e00\u4e2a\u975e\u5e38\u7075\u6d3b\u7684\u53d8\u91cf\u683c\u5f0f\uff0c\u901a\u8fc7array\u4ee5\u53ca\u5b83\u9644\u5e26\u7684\u4e00\u4e9b\u51fd\u6570\uff0c\u53ef\u4ee5\u5224\u65ad\u6574\u4e2a\u6570\u7ec4\u7684\u7ef4\u5ea6\u3001\u5927\u5c0f\uff0c\u751a\u81f3\u53ef\u4ee5\u505a\u5c40\u90e8\u6c42\u548c\u3001\u8f6c\u7f6e\u3001\u77e9\u9635\u4e58\u6cd5\u7b49\u7b49\uff0c\u800c\u5bf9array\u8d4b\u521d\u503c\u5c31\u53ef\u4ee5\u4f7f\u7528np.zeros(tuple,type)
\u5f97\u5230\u4e00\u4e2a\u786e\u5b9a\u5927\u5c0f\u7684\u3001\u6574\u4f53\u7684\u8d4b\u96f6\u6570\u7ec4\u3002tuple\u4ee3\u8868\u7684\u662f\u6574\u4e2aarray\u7684\u5f62\u72b6\uff0c\u6bd4\u5982(5,2,3)
\u5f97\u51fa\u6765\u7684\u5c31\u662f\u6570\u7ec4a[5][2][3]
\uff0ctype\u5c31\u662f\u6570\u7ec4\u7684\u6570\u636e\u7c7b\u578b\u3002 \u4e09\u3001\u7b2c21\u884c\u7684X[i, :]
\u662f\u4ec0\u4e48\u610f\u601d\uff1f \u2003\u2003\u8fd9\u662fpython\u4e2d\u7684\u4e00\u79cd\u7701\u7565\u5f62\u5f0f\uff0c\u9996\u5148\uff0c\u5bf9\u4e8e\u7b26\u53f7:
\u672c\u8eab\uff0c\u5b83\u672c\u8eab\u4ee3\u8868\u8303\u56f4\u7684\u9009\u53d6\uff0c\u6bd4\u5982[2:5]
\u9009\u53d6\u7684\u5c31\u662f [2]
\u3001[3]
\u548c[4]
\uff0c\u5373\\([2,5)\\)\u533a\u95f4\u7684\u6240\u6709\u6574\u6570\u53f7\u3002\u800c\u5982\u679c\u628a\u524d\u9762\u76842\u7701\u53bb\uff0c\u5219\u9ed8\u8ba4\u4ece\u4e0b\u68070\u5f00\u59cb\uff0c\u5982\u679c\u540e\u9762\u76845\u88ab\u7701\u53bb\uff0c\u5219\u9ed8\u8ba4\u5728\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7ed3\u675f\u3002\u56e0\u6b64\uff0c\u5f53\u7b2c\u4e8c\u7ef4\u5ea6\u4ec5\u6709:
\u65f6\uff0c\u524d\u540e\u6570\u5b57\u90fd\u88ab\u7701\u53bb\uff0c\u56e0\u6b64\u8fd9\u4e2a\u9009\u53d6\u662f\u4ece0\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff0c\u56e0\u6b64\u662f\u9009\u4e2d\u4e86\u4e00\u6574\u884c\u3002 \u4e09\u3001\u7b2c21\u884c\u7684axis = 1
\u662f\u4ec0\u4e48\u610f\u601d\uff1f axis
\u662fnp.sum()
\u4e2d\u7684\u4e00\u4e2a\u53c2\u6570\uff0c\u800c\u51fd\u6570np.sum()
\u662f\u628a\u6570\u7ec4\u7684\u67d0\u51e0\u4e2a\u7ef4\u5ea6\u7684\u6570\u5b57\u5168\u90e8\u52a0\u8d77\u6765\uff0c\u50cf\u662f\u505a\u4e00\u4e9b\u6295\u5f71\u64cd\u4f5c\uff0c\u628a\u6574\u4e2a\u6570\u7ec4\u964d\u4e86\u82e5\u5e72\u4e2a\u7ef4\u5ea6\u3002\u8fd9\u4e2aaxis\u5c31\u662f\u5bf9\u5e94\u7684\u7ef4\u5ea6\u3002\u6bd4\u5982\u6709\u4e09\u7ef4\u6570\u7ec4\uff0c\u6211\u4eec\u60f3\u8981\u628a\u5b83\u7684\u6700\u540e\u4e00\u4e2a\u4e2a\u7ef4\u5ea6\u5168\u90e8\u52a0\u8d77\u6765\uff0c\u5c31\u53ef\u4ee5\u8bbe\u7f6e\u53c2\u6570axis = -1
\u3002\u5728\u8fd9\u4e2a\u4f8b\u7a0b\u4e2d\uff0c\u628aaxis\u8bbe\u7f6e\u4e3a1\uff0c\u8fd9\u610f\u5473\u7740\u6c42\u548c\u5c06\u5bf9\u5e8f\u53f71\u7684\u7ef4\u5ea6\uff0c\u4e5f\u5c31\u662f\u8fd9\u4e2a\u4e8c\u7ef4\u6570\u7ec4\u7684\u6bcf\u4e00\u884c\u8fdb\u884c\u6c42\u548c\u3002
"},{"location":"ScientificResearch/CS231N/L2/#l2","title":"L2\u8ddd\u79bb\uff08\u6b27\u6c0f\u8ddd\u79bb\uff09","text":"
\u2003\u2003\u76f4\u63a5\u5730\u628a\u5404\u4e2a\u50cf\u7d20\u7684\u5dee\u8ddd\u76f8\u52a0\u4f3c\u4e4e\u8fdd\u80cc\u6211\u4eec\u5bf9\u8ddd\u79bb\u7684\u8ba4\u8bc6\uff0c\u5c31\u50cf\u6211\u5411\u4e1c\u8d70\u4e86100\u7c73\uff0c\u5411\u5317\u8d70\u4e86100\u7c73\uff0c\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u6211\u4eec\u8d70\u5230\u4e86\u8ddd\u79bb\u539f\u70b9200\u7c73\u7684\u5730\u65b9\u3002\u56e0\u6b64\uff0cL2\u8ddd\u79bb\u8fd0\u7528\u4e86\u6b27\u6c0f\u7a7a\u95f4\u7684\u523b\u753b\uff0c\u5c06\u6bcf\u4e00\u4e2a\u50cf\u7d20\u770b\u4f5c\u4e00\u4e2a\u7ef4\u5ea6\uff0c\u7136\u540e\u8ba1\u7b97\u591a\u7ef4\u7a7a\u95f4\u4e2d\u7684\u8ddd\u79bb\u3002
L2\u8ddd\u79bb\u516c\u5f0f\uff1a
\\[ L_2 = \\sqrt{\\sum_{p_{ij} \\in img}(p_{ij} - q_{ij})^2}, q_{ij} = \\text{constant} \\]
L2\u8ddd\u79bb\u548c\u8fd0\u884c\u4f18\u5316
\u56e0\u4e3aL2\u8ddd\u79bb\u7684\u516c\u5f0f\u7279\u6027\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u901a\u8fc7\u4e00\u5b9a\u7684\u62c6\u5206\uff0c\u53ef\u4ee5\u5927\u5927\u4f18\u5316\u7a0b\u5e8f\u7684\u8fd0\u884c\u901f\u5ea6\u3002\u67e5\u770b\u5177\u4f53\u4f18\u5316
"},{"location":"ScientificResearch/CS231N/L2/#kknn","title":"\u524dK\u6700\u8fd1\u90bb\u5c45\u7b97\u6cd5\uff08KNN\uff09","text":"
\u2003\u2003\u5728\u5148\u524d\u7684\u6700\u8fd1\u90bb\u5c45\u7b97\u6cd5\u4e2d\uff0c\u6211\u4eec\u76f4\u63a5\u91c7\u7528\u6700\u8fd1\u7684\u90bb\u5c45\u4f5c\u4e3a\u6211\u4eec\u56fe\u50cf\u7684\u5206\u7c7b\u4f9d\u636e\u3002\u8fd9\u5f88\u65b9\u4fbf\uff0c\u4f46\u662f\u5b83\u5bf9\u4e8e\u4e00\u4e9b\u8fb9\u754c\u60c5\u51b5\u7684\u5224\u65ad\u662f\u975e\u5e38\u7cdf\u7cd5\u7684\u3002\u6bd4\u5982\uff0c\u5982\u679c\u6211\u4eec\u7528\u4e8c\u7ef4\u5e73\u9762\u7684\u683c\u70b9\u6765\u8868\u793a\u5df2\u77e5\u7684\u70b9\uff0c\u5e76\u7528\u989c\u8272\u6765\u8868\u793a\u5b83\u4eec\u7684\u7c7b\u578b\uff0c\u800c\u8ba9\u70b9\u4e0e\u70b9\u95f4\u7684\u8ddd\u79bb\u6765\u8868\u793a\u56fe\u50cf\u95f4\u7684\u8ddd\u79bb\uff08\u8fd9\u6837\u7684\u8868\u793a\u5e76\u4e0d\u5b8c\u5168\u5408\u9002\uff0c\u4f46\u662f\u81f3\u5c11\u53ef\u4ee5\u8bf4\u660e\u95ee\u9898\uff09\uff0c\u6211\u4eec\u4f1a\u5f97\u5230\u5982\u4e0b\u7684\u56fe\uff1a
\u2003\u2003\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u7c7b\u4e0e\u7c7b\u4e4b\u95f4\u7684\u95f4\u8ddd\u662f\u5341\u5206\u7c97\u7cd9\u7684\uff0c\u5b58\u5728\u975e\u5e38\u591a\u7684\u952f\u9f7f\uff0c\u952f\u9f7f\u610f\u5473\u7740\u4e00\u70b9\u5fae\u5c0f\u7684\u5dee\u5f02\u5c31\u4f1a\u8ba9\u9884\u6d4b\u7ed3\u679c\u5929\u5dee\u5730\u522b\uff0c\u8fd9\u662f\u6211\u4eec\u4e0d\u60f3\u770b\u5230\u7684\uff0c\u53e6\u5916\u53ef\u4ee5\u89c2\u5bdf\u5230\u7684\u662f\u5728\u7eff\u8272\u7c7b\u4e2d\u95f4\u6709\u4e00\u5757\u201c\u98de\u5730\u201d\uff0c\u4f46\u662f\u6211\u4eec\u7684\u76f4\u89c9\u4f1a\u544a\u8bc9\u6211\u4eec\u8fd9\u662f\u4e00\u79cd\u6781\u5176\u7279\u6b8a\u7684\u60c5\u51b5\uff0c\u4e00\u822c\u6839\u636e\u89c4\u5f8b\u6027\u6765\u770b\uff0c\u4e2d\u95f4\u5e94\u8be5\u4ecd\u7136\u662f\u7eff\u8272\u7c7b\u3002 \u2003\u2003\u56e0\u6b64\uff0c\u4e3a\u4e86\u62b9\u5e73\u8fb9\u754c\u8ba9\u5176\u53d8\u5f97\u66f4\u52a0\u5149\u6ed1\u7b26\u5408\u76f4\u89c9\uff0c\u63d0\u9ad8\u6574\u4e2a\u6a21\u578b\u7684\u51c6\u786e\u6027\u5e76\u4e14\u589e\u52a0\u5bf9\u6781\u7aef\u60c5\u51b5\u7684\u8010\u53d7\u5ea6\uff0c\u8fdb\u4e00\u6b65\u5730\u63d0\u51fa\u4e86\u524dK\u6700\u8fd1\u90bb\u5c45\u7b97\u6cd5\uff08K-Nearest-Neighbour\uff09\u3002 \u2003\u2003\u987e\u540d\u601d\u4e49\uff0c\u524dK\u6700\u8fd1\u90bb\u5c45\u7b97\u6cd5\u6ca1\u6709\u628a\u6570\u636e\u53c2\u8003\u8bbe\u7f6e\u5728\u4e00\u4e2a\u70b9\u4e0a\uff0c\u800c\u662f\u5148\u9009\u53d6\u6700\u8fd1\u7684K\u4e2a\u70b9\uff0c\u7136\u540e\u6839\u636e\u8fd9K\u4e2a\u70b9\u7efc\u5408\u8fdb\u884c\u5224\u65ad\u3002\u6bd4\u5982\uff0c\\(K=5\\)\uff0c\u53d6\u4e94\u4e2a\u70b9\uff0c\u56db\u4e2a\u70b9\u662f\u7eff\u8272\uff0c\u4e00\u4e2a\u70b9\u662f\u9ec4\u8272\uff0c\u90a3\u4e48\u56e0\u4e3a\u7eff\u8272\u70b9\u6700\u591a\uff0c\u8f93\u51fa\u7ed3\u679c\u5c31\u662f\u7eff\u8272\u3002 KNN\u7b97\u6cd5\u4ee3\u7801 \u2003\u2003\u6267\u884c\u8fd9\u79cd\u7b97\u6cd5\u8fc7\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u91cd\u65b0\u89c2\u5bdf\u8fb9\u754c\u4e2d\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u770b\u5230\u51fa\u73b0\u4e86\u4e00\u4e9b\u201c\u767d\u8272\u201d\u533a\u57df\uff0c\u8fd9\u4e9b\u662f\u56e0\u4e3a\u5728\u8fd9\u7247\u533a\u57df\u524dK\u4e2a\u6700\u8fd1\u90bb\u5c45\u4e2d\u5b58\u5728\u591a\u4e2a\u6700\u591a\u7c7b\u578b\uff0c\u65e0\u6cd5\u8fdb\u884c\u5224\u65ad\u3002\u4f46\u662f\uff0c\u540c\u65f6\u53ef\u4ee5\u53d1\u73b0\uff0c\u8fb9\u754c\u7684\u952f\u9f7f\u60c5\u51b5\u5f97\u5230\u4e86\u6781\u5927\u7684\u6539\u5584\uff0c\u800c\u7eff\u8272\u5757\u4e2d\u95f4\u7684\u201c\u98de\u5730\u201d\u4e5f\u6d88\u5931\u4e86\u3002
"},{"location":"ScientificResearch/CS231N/L2/#hyperparameter","title":"\u9009\u53d6\u6700\u4f73\u8d85\u53c2\u6570\uff08Hyperparameter\uff09","text":"
\u2003\u2003\u8d85\u53c2\u6570\u662f\u4e0d\u7531\u5916\u754c\u8f93\u5165\uff0c\u800c\u7531\u7a0b\u5e8f\u5185\u90e8\u9700\u8981\u624b\u52a8\u8bbe\u7f6e\u7684\u53c2\u6570\uff0c\u5b83\u4f1a\u5f71\u54cd\u6574\u4e2a\u7a0b\u5e8f\u7684\u8fdb\u7a0b\u3002\u5728KNN\u7b97\u6cd5\u4e2d\uff0c\u8fd9\u4e2a\u8d85\u53c2\u6570\u5c31\u662fK\u3002\u800c\u6211\u4eec\u77e5\u9053\uff0c\u6211\u4eec\u4e0d\u80fd\u7528\u540c\u4e00\u4e2aK\u53bb\u8bad\u7ec3\u4e0d\u540c\u7684\u6a21\u578b\uff0c\u8fd9\u6837\u53ef\u80fd\u4f1a\u72af\u4e0b\u6559\u6761\u4e3b\u4e49\u9519\u8bef\u3002\u6240\u4ee5\u9488\u5bf9\u4e00\u7ec4\u6570\u636e\u96c6\uff0c\u6211\u4eec\u9700\u8981\u901a\u8fc7\u4e00\u4e9b\u624b\u6bb5\uff0c\u91cf\u8eab\u8ba2\u9020\u5730\u5224\u65ad\u6700\u5408\u9002\u7684K\u3002 \u2003\u2003\u76ee\u524d\uff0c\u6211\u4eec\u80fd\u60f3\u5230\u7684\u6700\u66b4\u529b\u7684\u65b9\u5f0f\u5c31\u662f\u5c1d\u8bd5\u7740\u4ee3\u5165\u4e00\u4e9bK\u6765\u9a8c\u8bc1\u54ea\u4e2aK\u80fd\u8fbe\u5230\u6700\u597d\u7684\u9884\u6d4b\u6548\u679c\u3002
\u9009\u53d6\u8d85\u53c2\u6570\u7684\u4e00\u4e9b\u65b9\u5f0f
\u6240\u6709\u7684\u6570\u636e\u4f5c\u4e3a\u8bad\u7ec3\u6570\u636e\u5206\u5272\u6570\u636e\u96c6\u4e3a\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6\u5206\u5272\u6570\u636e\u96c6\u4e3a\u8bad\u7ec3\u96c6\u3001\u9a8c\u8bc1\u96c6\u548c\u6d4b\u8bd5\u96c6
\u2003\u2003\u6211\u4eec\u5982\u679c\u9009\u62e9All in\uff0c\u628a\u624b\u4e0a\u6240\u6709\u7684\u6570\u636e\u5168\u90e8\u5f53\u4f5c\u8bad\u7ec3\u6570\u636e\uff0c\u867d\u7136\u8fd9\u4f1a\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\uff08\u867d\u7136\u7a0b\u5ea6\u5f88\u5c0f\uff09\u589e\u52a0\u6a21\u578b\u7684\u53ef\u9760\u6027\uff0c\u4f46\u662f\u6211\u4eec\u6ca1\u6709\u529e\u6cd5\u5728\u6d4b\u8bd5\u7684\u65f6\u5019\u53bb\u9a8c\u8bc1\u3002\u9009\u53d6K\u7684\u65f6\u5019\uff0c\\(K=1\\)\u7684\u6210\u529f\u9884\u6d4b\u7387\u4e00\u5b9a\u662f\\(100\\%\\)\uff0c\u56e0\u4e3a\u6211\u4eec\u7528\u4efb\u610f\u624b\u5934\u7684\u6570\u636e\u53bb\u9a8c\u8bc1\uff0c\u603b\u6709\u4e00\u4e2a\u5df2\u77e5\u70b9\u548c\u8fd9\u4e2a\u6570\u636e\u7684\u8ddd\u79bb\u4e3a\\(0\\)\uff08\u56e0\u4e3a\u5b83\u5df2\u7ecf\u88ab\u5305\u542b\u5728\u6a21\u578b\u5f53\u4e2d\u4e86\uff09\u3002\u6240\u4ee5\uff0c\u8fd9\u6837\u9009\u53d6K\u7684\u65b9\u5f0f\u662f\u4e0d\u80fd\u591f\u9009\u51fa\u6700\u4f18\u7684K\u7684\u3002
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diff --git a/sitemap.xml b/sitemap.xml
index c0d9c9b..45e208f 100755
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -2,12 +2,17 @@
https://ddking-zju.github.io/freeDomDive/
- 2024-01-17
+ 2024-01-21
daily
https://ddking-zju.github.io/freeDomDive/discussions/
- 2024-01-17
+ 2024-01-21
+ daily
+
+
+ https://ddking-zju.github.io/freeDomDive/ScientificResearch/CS231N/L2/
+ 2024-01-21
daily
\ No newline at end of file
diff --git a/sitemap.xml.gz b/sitemap.xml.gz
index fe5eac5..81f0459 100755
Binary files a/sitemap.xml.gz and b/sitemap.xml.gz differ