[转载请注明出处]http://www.cnblogs.com/mashiqi 2017/06/16 函数定义及前后文详见<Inverse Acoustic and Electromagnetic Scattering Theory>byColton & Kress第三版的公式(5.22) 左右. 可以下载下来放大看.…

%测试数据 'ex1data1.txt', 第一列为 population of City in 10,000s, 第二列为 Profit in $10,000s 1 6.1101,17.592 5.5277,9.1302 8.5186,13.662 7.0032,11.854 5.8598,6.8233 8.3829,11.886 7.4764,4.3483 6.4862,6.5987 5.0546,3.8166 5.7107,3.2522 14.164,15.505 5.734,3.1551…

FITTING A MODEL VIA CLOSED-FORM EQUATIONS VS. GRADIENT DESCENT VS STOCHASTIC GRADIENT DESCENT VS MINI-BATCH LEARNING. WHAT IS THE DIFFERENCE? In order to explain the differences between alternative approaches to estimating the parameters of a model,…

An overview of gradient descent optimization algorithms Table of contents: Gradient descent variantsChallenges Batch gradient descent Stochastic gradient descent Mini-batch gradient descent Gradient descent optimization algorithms Momentum Nesterov a…

原文地址:An overview of gradient descent optimization algorithms An overview of gradient descent optimization algorithms Note: If you are looking for a review paper, this blog post is also available as an article on arXiv. Update 15.06.2017: Added deriva…

Introduction Optimization is always the ultimate goal whether you are dealing with a real life problem or building a software product. I, as a computer science student, always fiddled with optimizing my code to the extent that I could brag about its…

[转载]clip gradient抑制梯度爆炸 来源:https://blog.csdn.net/u010814042/article/details/76154391 1.梯度爆炸的影响 在一个只有一个隐藏节点的网络中,损失函数和权值w偏置b构成error surface,其中有一堵墙,如下所示 损失函数每次迭代都是每次一小步,但是当遇到这堵墙时,在墙上的某点计算梯度,梯度会瞬间增大,指向某处不理想的位置.如果我们使用缩放,可以把误导控制在可接受范围内,如虚线箭头所示 2.解决梯度爆炸问题的方…

这篇论文最早是一篇2016年1月16日发表在Sebastian Ruder的博客.本文主要工作是对这篇论文与李宏毅课程相关的核心部分进行翻译. 论文全文翻译: An overview of gradient descent optimization algorithms 梯度下降优化算法概述 0. Abstract 摘要: Gradient descent optimization algorithms, while increasingly popular, are often used as…

经常有一些时候需要使用渐变背景,使用长条图片有点太不高大上了,于是自己写了个小例子,兼容多浏览器就要为每一个浏览器写对应的CSS,太低版本的浏览器只能使用图片做背景. 下面是当前五大浏览器对gradient的支持: <div id="gradient"></div> <style type="text/css" media="screen"> #gradient { width: 200px; height:…

Surface在C++层的创建源码解析 源码为:android4.4.4 1.创建SurfaceComposerClient绘图客户端 // create a client to surfaceflinger sp<SurfaceComposerClient> client = new SurfaceComposerClient();  //创建SurfaceFlinger的本地代理 展开SurfaceComposerClient源码:frameworks\native\libs\gui\Su…