learning momentum

cs231n Introduction See cs231n Course notes 1:introduction.Note: Italics are used to indicate the author's own thinking, correctness has not been validated, welcome advice. Optimized iterative algorithm Write in front: Karpathy recommends Adam as

Reprint Address: https://zhuanlan.zhihu.com/p/32488889 optimization algorithm Framework: calculates the gradient of the target function on the current parameter: calculates the first and second-order momentum based on the historical gradient:

The momentum method can be said to be a further optimization of SGD, details can be found hereHere is a simple implementation of Python with the following:#Coding=utf-8"""Momentum (momentum) reference based on low-volume gradient descent: 72615621

When training a network, the initial weights of the network are usually initialized according to a certain distribution, such as Gaussian distribution. Comparison of the performance impact of the initialization weight operation on the final

Deep Learning Notes (i): Logistic classificationDeep learning Notes (ii): Simple neural network, back propagation algorithm and implementationDeep Learning Notes (iii): activating functions and loss functionsDeep Learning Notes: A summary of

from:http://blog.csdn.net/u014595019/article/details/52989301 Recently looking at Google's deep learning book, see the Optimization method that part, just before with TensorFlow is also to those optimization method smattering, so after reading on

First, Momentum1. Calculate DW, Db.2. Define V_DB, V_dw\[v_{dw}=\beta v_{dw}+ (1-\beta) dw\]\[v_{db}=\beta v_{db}+ (1-\beta) db\]3. Update DW, DB\[dw=w-\alpha V_{dw}\]\[db=b-\alpha V_{db}\]Second, RMSprop1. Calculate DW, Db.2. Define S_DB, S_dw

Kinetic Energy formula:   Momentum formula:   Conservation of momentum:   Conservation of energy:   According to these rules, the following equations can be obtained:     Solve the equations and obtain the following formula:     Subtract the two

Transferred from: http://www.dataguru.cn/article-10174-1.html Gradient descent algorithm is a very extensive optimization algorithm used in machine learning, and it is also the most commonly used optimization method in many machine

Written in Front: it is said that next week will be xxxxxxxx, frighten the baby hurriedly find some advertising things to seeGbdt+lr's model was known before, and Dnn+lr's model was known, but none of them had been tested.The application of deep