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Space Shots: The Universe's Best Images

A gallery of photos, visualizations, and other pictures of outer space.<p><i>This post was last updated on Friday, May 12, 2017.</i><p>Here at <i>Popular Science</i>, we love space—and we know you do too. From seeing the nearly-true colors of Europa, a molten metal orb levitate in microgravity, or even a map of a …


高科技农机装备没有解放农民,反而成了噩梦 - 每日快讯 - 创业邦

These Amazing Instagram Photos Of Finland Will Make You Appreciate Winter

We have decided that we want to spend our next vacation staring at the stars and taking in the snow in Finland. Yes, that's right, we actually <i>want</i> to spend some time in the snow.<p>Once we saw Mikko Lagerstedt's Instagram photos of Finland, we were truly taken aback. The Finland-based photographer …



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Android体验各领风骚 全球最好用的8个ROM

享受视觉的盛宴 哪款手机屏幕最对你的胃口


本文作者:PanSci<p>这篇要讨论的可不是哲学议题,而是希望以一个“数学工具”的角度来看隐马可夫模型(Hidden Markov Model, HMM)是什么,它的背后假设、长处与限制,以理解这样的工具可以拿来做什么用,而不是只与特定的应用绑在一起。<p>隐马可夫模型?隐藏的马可夫模型?<p>隐马可夫模型是机器学习(Machine Learning)领域中常常用到的理论模型,从语音识别(Speech Recognition)、手势辨识(gesture recognition),到生物信息学(Bioinformatics)里的种种应用,都可以见到这个工具的身影。<p>既然名字里有“马可夫”,想当然,这又是一个马可夫 …