diff --git a/.obsidian/app.json b/.obsidian/app.json
index d0aff95..669d1ca 100644
--- a/.obsidian/app.json
+++ b/.obsidian/app.json
@@ -1,7 +1,7 @@
 {
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   "newLinkFormat": "relative",
-  "attachmentFolderPath": "./assets/矩阵求导",
+  "attachmentFolderPath": "./assets/Lesson 1",
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   "newFileLocation": "current",
   "useMarkdownLinks": true,
diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 3880167..0f6929b 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,24 +13,13 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md",
+                "file": "Study/DL/吴恩达深度学习课程/Lesson 1.md",
                 "mode": "source",
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               }
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+        ]
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@@ -88,8 +77,7 @@
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-    "collapsed": true
+    "width": 315.5
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@@ -105,7 +93,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md",
+                "file": "Study/DL/吴恩达深度学习课程/Lesson 1.md",
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@@ -122,7 +110,7 @@
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               "type": "outgoing-link",
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-                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md",
+                "file": "Study/DL/吴恩达深度学习课程/Lesson 1.md",
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@@ -145,7 +133,7 @@
             "state": {
               "type": "outline",
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-                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md"
+                "file": "Study/DL/吴恩达深度学习课程/Lesson 1.md"
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@@ -176,10 +164,11 @@
       "table-editor-obsidian:Advanced Tables Toolbar": false
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-  "active": "b962b40d874064d3",
+  "active": "82a60b2f86acd8d6",
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+    "Study/DL/吴恩达深度学习课程/Other.md",
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     "Books/动手学深度学习/基础概念.md",
-    "Study/DL/吴恩达深度学习课程/矩阵求导.md",
     "Study/DL",
     "Study",
     "Study/DL/吴恩达深度学习课程",
diff --git a/Study/DL/吴恩达深度学习课程/Lesson 1.md b/Study/DL/吴恩达深度学习课程/Lesson 1.md
new file mode 100644
index 0000000..c5eea42
--- /dev/null
+++ b/Study/DL/吴恩达深度学习课程/Lesson 1.md	
@@ -0,0 +1 @@
+# Neural Network and Deep Learning
diff --git a/Study/DL/吴恩达深度学习课程/矩阵求导.md b/Study/DL/吴恩达深度学习课程/Other.md
similarity index 98%
rename from Study/DL/吴恩达深度学习课程/矩阵求导.md
rename to Study/DL/吴恩达深度学习课程/Other.md
index 87e24e1..2d9345c 100644
--- a/Study/DL/吴恩达深度学习课程/矩阵求导.md
+++ b/Study/DL/吴恩达深度学习课程/Other.md
@@ -1,3 +1,4 @@
+# 矩阵求导
 ## 概念
 标量函数：输出为标量的函数
 $$