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matrixslow's Issues

Variable类存在错误

Variable类在初始化时,父类Node的初始化不应该传入self参数,即

def __init__(self, dim, init=False, trainable=True, **kargs):
    """
    变量节点没有父节点,构造函数接受变量的形状,是否初始化以及是否参与训练的标识
    """
    Node.__init__(**kargs) #而非Node.__init__(self,  **kargs)
    self.dim = dim

这是因为如果传入self,则Node会将自身Variable实例收集到parent参数中,然后将自己加入到自己的children列表中,如果调用reset_value函数,就会陷入无限递归,从而报错

matrixslow/core/core.py中的一处疑问

image
此处的
return [node for node in default_graph.nodes if isinstance(node, Variable) and node.trainable]
是否应该改为:
return [node for node in graph.nodes if isinstance(node, Variable) and node.trainable]

书中,有处公式存在错误

HI,
首先,非常喜欢您的书,之前看过许多关于深度学习方面的书籍,但是对于深度学习框架本身介绍的书籍却不多,而且,深度学习框架本身代码量比较大,更新快,所以直接看源码,很痛苦。

  • 我在微信读书,阅读您的书籍的时候发现,有数公式是否存在错误 。 公式4.2 是关于p1 的定义,下面关于p2 的定义,是否多出了一个负号。
    image

关于书中第一章(第7页)内容的疑问

你好,我最近正在看您出的书
因为我是初学者,对于某些问题的理解没有很深刻
在书的第七页,您提到为了减少模型对新样本的输出值,可以使用式1.3调整权值和偏置
这样做的依据是利用xi的符号进而控制权值wi的更新(增大 or 减小)
这里我有疑问如下:
xi(i=1,2,3)代表的是(身高,体重,体脂率),那xi为什么会有小于0的情况
式1.3是依据经验构造的吗?

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