theano.function中givens的作用

以Theano tutorial里的代码为例:

可以只用input,不用givens实现同样的模型,但对于小数据集,那样会导致速度[……]

阅读全文

用RNN读懂序列

Deep neural networks have recently conquered a number of major problems in machine perception. Able to learn representations, the methods are especially effective in domains where any given feature in the raw data is uninformative. Consider, for example, an image with dimension 300x300pixels. Any one pixel by itself effectively meaningless. By computing successive layers of representation, however, a neural network is able to identify hierarchical features, like edge detectors at a low level, and faces at a high level which enable accurate classification of images into abstract object categories.[……]

阅读全文