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    FunAI 教材討論 ==== :::info 12/12 晚上第一版本投影片修正確認 如果有使用到網路的圖片或範例都要在下面貼上參考連結 ::: ## 參與人員 ### 進階組 文正、 政瑋(?)、 品萱、依婷(花費時間:8 小時) 杰穎、紹宏 ( 花費時間: 8 小時) 筱薇、依璇(花費時間:2 小時) 景璞、本耀 ( 花費時間: 8 小時) 彬彬、億龍(花費時間:8 小時) 其龍、容正 (花費時間: 8 小時) ## 去年的錄影 https://youtube.com/playlist?list=PLDXADJ7kFZyosK8LQRbCa711MCjg3IwIL ## 投影片檔案 https://drive.google.com/drive/folders/1Twses99fQD1q43C0i15KdEl-ZSCSLeYN ## DL01 - Neural Network - 負責人:景璞、本耀 * Page 5: 解釋函式作用 * Page 7: 加解釋數學符號(粗體是矩陣...) * Page 11: 改成另一種解釋:每個 layer 會把每個點 mapping 到另一個 space 上面 (feature transformation),這樣最後就可以透過一條直線把資料分類 * Page 12: 用 "Universality" 代替原本的解釋:neural networks have a kind of universality. No matter what function we want to compute, we know that there is a neural network which can do the job. (http://neuralnetworksanddeeplearning.com/chap4.html) * Page 16: 投影片:Ok。加解釋: Error function 的意義,目的是把 Error function 最佳化(找出 **w** 參數使 Error function 得到最少值),可以透過微分進行最佳化 #### 修改內容 * 以老師 MMsports課程例子來修改投影片,並重新錄製。 ## DL02 - Pytorch CNN - 負責人:杰穎、紹宏 * Page 4-6: 可講可不講 * Page 8:講inherit的概念,右下照片錯了(Forward的地方沒用到 x) `output = self.conv1(x)` * Page 9:講custom dataset * 加一頁 useful link:pytorch tutorial ... ## RL01 - Introduction - 負責人:杰穎、紹宏 * 順序調整:先講有趣的例子再講RL * 找幾個近期好玩有趣的例子(有影片佳) * ICRA2021, Gran Turismo(賽車遊戲)https://www.youtube.com/watch?v=e8TVPv4D4O0&ab_channel=UZHRoboticsandPerceptionGroup * 馬力歐的例子換成打磚塊(較不複雜) * 加上文字幫助了解什麼是action, agent, environment, reward ## RL02 - Markov Decision Process - 負責人:筱薇、依璇 - P9 投影片可以文字補充前面提到的Markovian property的定義 - 所有的過程都有隨機性, 下一個狀態轉移只與現在這個狀態有關 - P17 可以補充說明discount factor的用處 - 考慮action時,需同時考慮現在與未來的總reward,而現在的reward又會比未來更重要 - P19 可以加上文字介紹Deterministic與及Stochastic的不同之處 : - Deterministic (某一個狀態s的策略應當是固定的,其概率始終為1,不會發生改變) - Stochastic (在這個狀態上所有的動作都存在一個被選到的概率,動作是根據策略得出的分佈中sample出來的) ## RL03 - Bellman Equation - 負責人:彬彬、億龍 #### 修改內容(底線代表新增的內容): 1. (已修改:[參考內容](https://spinningup.openai.com/en/latest/spinningup/rl_intro.html))增加 return 的用途 5. (已修改:[參考內容](https://spinningup.openai.com/en/latest/spinningup/rl_intro.html))12 頁及 17 頁增加 pi、Transition Probability 的註解 ## RL04 - Dynamic Programming - 負責人:景璞、本耀 * Page 5: 加解釋右下角的圖(白色節點是 State, 黑色節點是 Return) * Page 10, 19: 加指出 Dynamic Programming 被應用哪裏 #### 修改內容 * 最終並未修改簡報。 ## RL05 - From MDP to RL - 負責人:品萱、依婷 - 這章比較屬於大架構的 overview,內容上較分散。感覺在每一個小 part 前面可以先說清楚與前一小 part 的關係可能可以更好理解 - p11: 可以增加定義且用例子說明 Discrete, continuous environments 兩種差異,不然好像有點跳太快@@ $\rightarrow$ [可參考](https://medium.com/swlh/states-observation-and-action-spaces-in-reinforcement-learning-569a30a8d2a1) ## RL06 - Value-based Method - 負責人:品萱、依婷 - p5: **投影片**可以加上 RL03-Bellman 的圖示、符號Notation,可能更好理解 - p6: **投影片**可以加上圖示例子以說明公式 - p11: **影片**有提到遞迴更長的展開,可以補充公式在**投影片**的旁邊輔助說明 - p11: $r_{t+1}$ **影片**講正確的信號(?),但可能用 reward 會更貼切 - p14: **投影片**可以再放一次 Q-Table 幫助了解 - p22: **影片**內容可以利用左邊演算法的圖對 DQN 做一個總結,不然好像有點不知所以XD $\rightarrow$ [可參考](https://medium.com/雞雞與兔兔的工程世界/機器學習-ml-note-reinforcement-learning-強化學習-dqn-實作atari-game-7f9185f833b0) ## RL07 - Policy-based Method - 負責人:彬彬、億龍 #### 修改內容(底線代表新增的內容): 1. (已修改:[參考內容1](https://www.statology.org/interpret-log-likelihood/)、[參考內容2](https://www.investopedia.com/terms/e/expectedreturn.asp))6 頁增加 Log-likelihood 及 Expected return 的註解(會越傾向將走的越好的路徑做 gradient) 2. 6 頁刪除 Compared with maximum log-likelihood 的文字敘述 ## Lab01 - Q-Learning - 負責人:筱薇、依璇 - P5更改指令部分,規定gym版本為0.24.0 - 有另外找到[Lab影片](https://drive.google.com/drive/folders/1Lno6hCD9-LkVWCrLWj7uSINdDA43KKe7?usp=share_link),內容講解詳細無須修改 ## Lab02 - DQN Tutorial - 負責人:其龍、容正 - P9 - 新增指令,限制gym版本為0.19.0 - P15 - 調整文字排版,增加action * k times文字註解 - P27 - 新增TD-error圖片輔助: [參考內容](https://hackmd.io/@shaoeChen/Bywb8YLKS/https%3A%2F%2Fhackmd.io%2F%40shaoeChen%2FSyqVopoYr) ## Lab03 - PPO Tutorial - 負責人:其龍、容正

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