Deep Learning(深度学习)学习笔记整理系列之(三)

2017-05-29 微天使 Deep Learning(深度学习)学

Deep Learning(深度学习)学习笔记整理系列之(三)

  好了,到了这一步,终于可以聊到Deep learning了。上面我们聊到为什么会有Deep learning(让机器自动学习良好的特征,而免去人工选取过程。还有参考人的分层视觉处理系统),我们得到一个结论就是Deep learning需要多层来获得更抽象的特征表达。那么多少层才合适呢?用什么架构来建模呢?怎么进行非监督训练呢? 五、Deep Learning的基本思想       假设我们有一个系统S,它有n层(S1,…Sn),它的输入是I,输出是O,形象地表示为: I =>S1=>S2=>…..=>Sn => O,如果输出O等于输入I,即输入I经过这个系统变化之后没有任何的信息损失(呵呵,大牛说,这是不可能的。信息论中有个“信息逐层丢失”的说法(信息处理不等式),设处理a信息得到b,再对b处理得到c,那么可以证明:a和c的互信息不会超过a和b的互信息。这表明信息处理不会增加信息,大部分处理会丢失信息。当然了,如果丢掉的是没用的信息那多好啊),保持了不变,这意味着输入I经过

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  1. [GetPortalCommentsPageByObjectIdResponse(id=206414, encodeId=07b620641435, content=学习。, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDcVAydhtcpjiaxLrZD7Eb5YnKPgf7ypGpfyl7FflFyAenvQLbib6T0LPXIhXo9SPNPXYYFFJbEgykztwJ0HQ61I3F9GxIVKWsgQ/0, createdBy=f38d2052407, createdName=周周人, createdTime=Sun Jun 04 13:29:21 CST 2017, time=2017-06-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1624576, encodeId=fff816245e671, content=<a href='/topic/show?id=3f2d2e7087' target=_blank style='color:#2F92EE;'>#ARNI#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2770, encryptionId=3f2d2e7087, topicName=ARNI)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f41c20676233, createdName=gongliu, createdTime=Wed May 31 14:05:00 CST 2017, time=2017-05-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=204448, encodeId=399220444833, content=好好努力学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=1, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=45101626056, createdName=忠诚向上, createdTime=Tue May 30 16:54:26 CST 2017, time=2017-05-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=204369, encodeId=9ad72043692d, content=学习了谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=00501987275, createdName=130****4638, createdTime=Tue May 30 09:22:26 CST 2017, time=2017-05-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=204201, encodeId=442020420163, content=非常好,非常实用, beContent=null, objectType=article, channel=null, level=null, likeNumber=1, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDcohE5MKT1FYlH69x7qib45icLgBDMANxIiauEA62nuQI1eE8Ez2rO3yqOkRLH6ha6Lw0x1IBRm0N7g/0, createdBy=e1ff2033933, createdName=187****0626, createdTime=Tue May 30 05:49:29 CST 2017, time=2017-05-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=204158, encodeId=d561204158b4, content=学习了很有用, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib3IzoRn621JdKCFUI4XvNELcibocrAVU6aUzEVDSaf3rYH08PUYUiagGqxAEhj8g9WqqNvD1CupIpCrmnR2OrqHZh/0, createdBy=7f181365728, createdName=飛歌, createdTime=Tue May 30 00:06:54 CST 2017, time=2017-05-30, status=1, ipAttribution=)]
    2017-06-04 周周人

    学习。

    0

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    2017-05-31 gongliu
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    2017-05-30 忠诚向上

    好好努力学习

    0

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    2017-05-30 130****4638

    学习了谢谢分享。

    0

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    2017-05-30 187****0626

    非常好,非常实用

    0

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    2017-05-30 飛歌

    学习了很有用

    0

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