{"id":2511,"date":"2024-03-13T16:34:39","date_gmt":"2024-03-13T07:34:39","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/keras%e3%81%a7%e5%bc%b7%e5%8c%96%e5%ad%a6%e7%bf%92%e3%82%a2%e3%83%ab%e3%82%b4%e3%83%aa%e3%82%ba%e3%83%a0%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b\/"},"modified":"2025-08-02T07:30:42","modified_gmt":"2025-08-01T22:30:42","slug":"keras%e3%81%a7%e5%bc%b7%e5%8c%96%e5%ad%a6%e7%bf%92%e3%82%a2%e3%83%ab%e3%82%b4%e3%83%aa%e3%82%ba%e3%83%a0%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/keras%e3%81%a7%e5%bc%b7%e5%8c%96%e5%ad%a6%e7%bf%92%e3%82%a2%e3%83%ab%e3%82%b4%e3%83%aa%e3%82%ba%e3%83%a0%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b\/","title":{"rendered":"Keras\u3067\u5f37\u5316\u5b66\u7fd2\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u3069\u306e\u3088\u3046\u306b\u4f7f\u7528\u3059\u308b\u304b"},"content":{"rendered":"<p>Keras\u3067\u5f37\u5316\u5b66\u7fd2\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u3046\u306b\u306f\u3001\u901a\u5e38\u3001\u7279\u5b9a\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u5fc5\u8981\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001OpenAI Gym\u3084Stable Baselines\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Keras\u3067Deep Q-Learning\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\uff08DQN\uff09\u3092\u4f7f\u7528\u3057\u305f\u5f37\u5316\u5b66\u7fd2\u3092\u5b9f\u88c5\u3059\u308b\u4f8b\u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code class=\"lang-python\">import gym\r\nimport numpy as np\r\nfrom keras.models import Sequential\r\nfrom keras.layers import Dense\r\nfrom keras.optimizers import Adam\r\n\r\n# \u521b\u5efa\u73af\u5883\r\nenv = gym.make('CartPole-v1')\r\nstate_size = env.observation_space.shape[0]\r\naction_size = env.action_space.n\r\n\r\n# \u521b\u5efa\u795e\u7ecf\u7f51\u7edc\u6a21\u578b\r\nmodel = Sequential()\r\nmodel.add(Dense(24, input_dim=state_size, activation='relu'))\r\nmodel.add(Dense(24, activation='relu'))\r\nmodel.add(Dense(action_size, activation='linear'))\r\nmodel.compile(loss='mse', optimizer=Adam(lr=0.001))\r\n\r\n# \u5b9a\u4e49Deep Q-Learning\u7b97\u6cd5\r\ndef DQN(state, epsilon):\r\n    if np.random.rand() &lt;= epsilon:\r\n        return np.random.choice(action_size)\r\n    q_values = model.predict(state)\r\n    return np.argmax(q_values[0])\r\n\r\n# \u8bad\u7ec3\u6a21\u578b\r\nepsilon = 1.0\r\ngamma = 0.95\r\nbatch_size = 32\r\nepisodes = 1000\r\nfor episode in range(episodes):\r\n    state = env.reset()\r\n    state = np.reshape(state, [1, state_size])\r\n    done = False\r\n    for time in range(500):\r\n        action = DQN(state, epsilon)\r\n        next_state, reward, done, _ = env.step(action)\r\n        next_state = np.reshape(next_state, [1, state_size])\r\n        target = reward + gamma * np.amax(model.predict(next_state)[0])\r\n        target_f = model.predict(state)\r\n        target_f[0][action] = target\r\n        model.fit(state, target_f, epochs=1, verbose=0)\r\n        state = next_state\r\n        if done:\r\n            break\r\n    if epsilon &gt; 0.01:\r\n        epsilon -= 0.01\r\n\r\n# \u6d4b\u8bd5\u6a21\u578b\r\nstate = env.reset()\r\nstate = np.reshape(state, [1, state_size])\r\ndone = False\r\nwhile not done:\r\n    action = np.argmax(model.predict(state)[0])\r\n    next_state, reward, done, _ = env.step(action)\r\n    next_state = np.reshape(next_state, [1, state_size])\r\n    state = next_state\r\n    env.render()\r\n\r\nenv.close()\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u307e\u305aCartPole\u74b0\u5883\u3092\u4f5c\u6210\u3057\u3001\u72b6\u614b\u7a7a\u9593\u3068\u884c\u52d5\u7a7a\u9593\u306e\u6b21\u5143\u3092\u5b9a\u7fa9\u3057\u307e\u3057\u305f\u3002\u6b21\u306b\u3001Adam\u30aa\u30d7\u30c6\u30a3\u30de\u30a4\u30b6\u30fc\u3092\u4f7f\u7528\u3057\u3066\u5358\u7d14\u306a\u30cb\u30e5\u30fc\u30e9\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u9078\u629e\u3059\u308b\u305f\u3081\u306eDQN\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3001\u30e2\u30c7\u30eb\u306e\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3068\u30c6\u30b9\u30c8\u304c\u884c\u308f\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u308c\u306f\u5358\u306a\u308b\u4f8b\u3067\u3059\u306e\u3067\u3001\u5b9f\u969b\u306e\u5fdc\u7528\u3067\u306f\u3088\u308a\u8907\u96d1\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u9020\u3084\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u6226\u7565\u304c\u5fc5\u8981\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306f\u3054\u81ea\u8eab\u306e\u30cb\u30fc\u30ba\u3084\u74b0\u5883\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Keras\u3067\u5f37\u5316\u5b66\u7fd2\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u3046\u306b\u306f\u3001\u901a\u5e38\u3001\u7279\u5b9a\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u5fc5\u8981\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001OpenAI Gym\u3084Stable Baselines\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Keras\u3067Deep Q-Learning [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-2511","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Keras\u3067\u5f37\u5316\u5b66\u7fd2\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u3069\u306e\u3088\u3046\u306b\u4f7f\u7528\u3059\u308b\u304b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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