{"provider_url":"https://hatena.blog","title":"\u591a\u5c64\u30d1\u30fc\u30bb\u30d7\u30c8\u30ed\u30f3","author_name":"HTN20190109","description":"python3.11 import numpy as np def sigmoid(x): return 1 / (1+np.exp(-x) ) def identity_function(x): return x class NeuralNetwork: def __init__(self,input_size,hidden_size,output_size): self.w1 = np.random.randn(input_size, hidden_size[0]) self.b1 = np.random.randn(hidden_size[0]) self.w2 = np.random.\u2026","author_url":"https://blog.hatena.ne.jp/HTN20190109/","version":"1.0","blog_title":"HTN20190109\u306e\u65e5\u8a18","type":"rich","provider_name":"Hatena Blog","url":"https://htn20190109.hatenablog.com/entry/2025/08/15/151337","image_url":null,"published":"2025-08-15 15:13:37","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhtn20190109.hatenablog.com%2Fentry%2F2025%2F08%2F15%2F151337\" title=\"\u591a\u5c64\u30d1\u30fc\u30bb\u30d7\u30c8\u30ed\u30f3 - HTN20190109\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://htn20190109.hatenablog.com/","height":"190","categories":["DL"]}