xxHash - Extremely fast hash algorithm xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. Code i…

1.论文“A fast learning algorithm for deep belief nets”的“explaining away”现象的解释: 见:Explaining Away的简单理解 2.论文“A fast learning algorithm for deep belief nets”的整个过程及其“Complementary priors”的解释: 见:paper:A fast learning algorithm for deep belief nets和 [2014041…

Deeplearning原文作者Hinton代码注解 Matlab示例代码为两部分,分别对应不同的论文: . Reducing the Dimensionality of data with neural networks ministdeepauto.m backprop.m rbmhidlinear.m . A fast learing algorithm for deep belief net mnistclassify.m backpropclassfy.m 其余部分代码通用. %%%%…

安全哈希算法(Secure Hash Algorithm)主要适用于数字签名标准 (Digital Signature Standard DSS)里面定义的数字签名算法(Digital Signature Algorithm DSA).对于长度小于2^64位的消息,SHA1会产生一个160位的消息摘要.当接收到消息的时候,这个消息摘要可以用来验证数据的完整性.在传输的过程中,数据很可能会发生变化,那么这时候就会产生不同的消息摘要. SHA1有如下特性:不可以从消息摘要中复原信息:两个不同的消息不…

论文笔记(2):A fast learning algorithm for deep belief nets. 这几天继续学习一篇论文,Hinton的A Fast Learning Algorithm for Deep Belief Nets.这篇论文一开始读起来是相当费劲的,学习了好几天才了解了相关的背景,慢慢的思路也开始清晰起来.DBN算法就是Wake-Sleep算法+RBM,但是论文对Wake-Sleep算法解释特别少.可能还要学习Wake-Sleep和RBM相关的的知识才能慢慢理解,今天…

super fast sort algorithm in js sort algorithm Promise.race (return the fast one) Async / Await // chrome & fast sort 快速排序 // firefox & merge sort 归并排序 const superFastSort = (arr = []) => { let result = []; // Promise.race + Async / Await retur…

http://www.elnec.com/products/universal-programmers/beeprog2c/ FPGA based totally reconfigurable 48 powerful TTL pindrivers provide H/L/pull_up/pull_down and read capability for each pin of socket. Advanced pindrivers incorporate high-quality high-sp…

https://golang.google.cn/pkg/crypto/md5/ Go by Example 中文:Base64编码 https://books.studygolang.com/gobyexample/base64-encoding/…

Awesome C/C++ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff. Awesome C/C++ Standard Libraries Frameworks Artificial Intelligence Asynchronous Event Loop Audio Biology BitTorrent CLI…

很棒的 C/C++ 框架,类库,资源集合. Awesome C/C++ Standard Libraries Frameworks Artificial Intelligence Asynchronous Event Loop Audio Biology Compression Concurrency Containers Cryptography Database Debug Game Engine GUI Graphics Image Processing Internationalizat…

https://github.com/fffaraz/awesome-cpp Awesome C/C++ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff. Awesome C/C++ Standard Libraries Frameworks Artificial Intelligence Asynchronous E…

来自 https://github.com/fffaraz/awesome-cpp A curated list of awesome C/C++ frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff Standard Libraries C++ Standard Library - including STL Containers, STL Aglorithm, STL Functio…

LZ4 (Extremely Fast Compression algorithm) 项目:http://code.google.com/p/lz4/ 作者:Yann Collet 本文作者:zhangskd @ csdn blog LZ4格式 The compressed block is composed of sequences. 每个数据块可以压缩成若干个序列,格式如下: (1) literals length of literals. If it is 0, then there is…

摘自:https://f5.com/resources/white-papers/mitigating-ddos-attacks-with-f5-technology Mitigating Application Attacks At the top of the OSI stack is the application layer. This is the area where it's most difficult to detect or defend against malicious…

原文链接 Awesome C++ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff. Awesome C++ Standard Libraries Frameworks Artificial Intelligence Asynchronous Event Loop Audio Biology BitTorren…

1. 安装统计 2. 安装列表 3. 安装说明 4. 作为依赖项的安装列表 5. 更正 mangaro使用减的方式安装系统.开箱即用的豪华版本,大部分人需要的都有了,同样包括个别用户不需要的,配置方面为了好用有很多是自动模式,开机启动等. Arch使用加的方式安装系统.初始base包只有50来个最基本的软件包,需要什么自己装,自己配置.使用Arch50天.下面是截至目前安装的软件列表供参考. 1. 安装统计 $ sudo pacman -Q |wc -l 822 $ sudo pacman -Q…

LZ4 (Extremely Fast Compression algorithm) 项目:http://code.google.com/p/lz4/ 作者:Yann Collet 本文作者:zhangskd @ csdn blog 简介 LZ4 is a very fast lossless compression algorithm, providing compression speed at 400MB/s per core, scalable with multi-cores CPU.…

使用tar+lz4/pigz+ssh更快的数据传输 -- | :41分类:Linux,MySQL | 前面一篇介绍了如何最大限度的榨取SCP的传输速度,有了这个基础,就可以进一步的使用压缩来加速传输速度了.只使用scp,传输速率最快约90MB,本文通过压缩将把最快传输速率提升到约250MB/s(包括解压的过程). 目录 [hide] . 结论 . 关于lz4 . 性能环境说明 3.1 磁盘读取和落盘 3.2 打包.拆包 3.3 压缩.解压缩 3.4 传输 3.5 整体流程 . 实验测试 4.1…

title author date CreateTime categories dotnet 使用 lz4net 压缩 Stream 或文件 lindexi 2019-08-31 16:55:58 +0800 2019-4-2 8:4:12 +0800 dotnet 在 dotnet 可以使用 LZ4 这个无损的压缩算法,这个压缩算法的压缩率不高但是速度很快.这个库支持在 .NET Standard 1.6 .NET Core .NET Framework Mono Xamarin 和 UWP…

在 dotnet 可以使用 LZ4 这个无损的压缩算法,这个压缩算法的压缩率不高但是速度很快.这个库支持在 .NET Standard 1.6 .NET Core .NET Framework Mono Xamarin 和 UWP 运行 压缩算法 LZ4 的原代码是使用 C 写的,请看代码 本文的 K4os.Compression.LZ4 是使用 C# 写的,里面也有版本使用了 C++ 代码 因为很多时候都是对 Stream 压缩,所以重点告诉大家如何进行 Stream 压缩 注意这个压缩算法不…

Arch-base-vs-iso 通常绝大多数的Linux分发版的iso镜像本身(*.iso文件都有约2Gb上下)都可以直接启动电脑并运行完整的Linux桌面系统. 极少数的Linux发行版仅提供命令行界面,没有桌面环境.比如arch Linux的iso文件只有600Mb,但是即便如此,他也拥有完整的硬件适应识别能力,及连接各种网络的功能,能够识别各种磁盘分区的文件系统. Arch 的基本系统环境包含的软件包 Arch的初次安装只需要安装base或者base+ base devel(包含源码安装…

MySQL :: MySQL 8.0 Reference Manual :: 8.3.9 Comparison of B-Tree and Hash Indexes https://dev.mysql.com/doc/refman/8.0/en/index-btree-hash.html If you use ... LIKE '%string%' and string is longer than three characters, MySQL uses the Turbo Boyer-Moo…

Hash function From Wikipedia, the free encyclopedia   A hash function that maps names to integers from 0 to 15. There is a collision between keys "John Smith" and "Sandra Dee". A hash function is any function that maps data of arbitrar…

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…

In data structure Hash, hash function is used to convert a string(or any other type) into an integer smaller than hash size and bigger or equal to zero. The objective of designing a hash function is to "hash" the key as unreasonable as possible.…

6 Easy Steps to Learn Naive Bayes Algorithm (with code in Python) Introduction Here’s a situation you’ve got into: You are working on a classification problem and you have generated your set of hypothesis, created features and discussed the importanc…

哈希表(Hash table,也叫散列表),是根据关键码值(Key value)而直接进行访问的数据结构.也就是说,它通过把关键码值映射到表中一个位置来访问记录,以加快查找的速度.具体的介绍网上有很详细的描述,如闲聊哈希表 ,这里就不再累述了: 哈希表在像Java.C#等语言中是与生俱来的.可是在C的世界中,似乎只有自己动手,丰衣足食:在网上google了一把,大致有几个版本,我会一一来分析对比: 首先先来交代一下哈希表实现中需要注意的一些概念: (主要参考:这里) 1.哈希函数 也叫散列函数,…

In the last chapter we saw how neural networks can learn their weights and biases using the gradient descent algorithm. There was, however, a gap in our explanation: we didn't discuss how to compute the gradient of the cost function. That's quite a g…

this PR aggregates a lot of small modifications to core, trie, eth and other packages to collectively implement the eth/63 fast synchronization algorithm. In short, geth --fast. 这个提交请求包含了对core,trie,eth和其他一些package的微小的修改,来共同实现eth/63的快速同步算法. 简单来说, geth…

转自:http://colobu.com/2015/04/13/consistent-hash-algorithm-in-java-memcached-client/ memcached Java客户端spymemcached的一致性Hash算法 最近看到两篇文章,一个是江南白衣的陌生但默默一统江湖的MurmurHash,另外一篇是张洋的一致性哈希算法及其在分布式系统中的应用.虽然我在项目中使用memcached的java客户端spymemcached好几年了,但是对它的一致性哈希算法的细节从来…