上次提到Little定律, 我也解释过它跟另外一个公式有一些内在的关系,但是其实我自己对LL在当前复杂架构系统中到底是怎么应用的也没有完整的想法,于是我在Linkedin上把这个问题抛了出来,没有想到的是得到了很多大师级前辈回复,有些甚至非常详细: 我的问题: Does Little'law really applicable to apply performance model now? Yong Fu I'm confusing that the meaning of parameters…
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<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <script type="text/javascript" src="../../angular.min.js&quo…
安装包 1.VMware 14 https://dl-sh-ctc-2.pchome.net/08/b7/VMware-Workstation-Full-14.1.3-9474260.x86_64.bundle 2.VMware 15 https://www.vmware.com/cn/products/workstation-pro/workstation-pro-evaluation.html 3.VMware官网下载 https://www.vmware.com/cn.html 开始安装…
Version 3, 29 June 2007       Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>   Everyone is permitted to copy and distribute verbatim copies   of this license document, but changing it is not allowed.       Preamble       The GNU…
Directions: For this part, you are allowed 30 minutes to write a short essay on the challenges of studying abroad. You should write at least 120 words but no more than 180 words. ①As is universally acknowledged, it is by no means easy to study abroad…
About SQLite See Also... Features When to use SQLite Frequently Asked Questions Well-known Users Books About SQLite Getting Started SQL Syntax Pragmas SQL functions Date & time functions Aggregate functions C/C++ Interface Spec Introduction List of C…
Spark Streaming 编程指南 Overview A Quick Example Basic Concepts Linking Initializing StreamingContext Discretized Streams (DStreams) Input DStreams and Receivers Transformations on DStreams Output Operations on DStreams DataFrame and SQL Operations MLli…
About this Course This course will teach you how to build models for natural language, audio, and other sequence data. Thanks to deep learning, sequence algorithms are working far better than just two years ago, and this is enabling numerous exciting…
http://scottge.net/2015/07/08/a-complete-list-of-net-open-source-developer-projects/?utm_source=tuicool NET Implementations .NET Core – Core .NET Framework C# Native – Compiles C# to native. Cosmos – C# Open Source Managed Operating System, an operat…
Accumulators and Broadcast Variables 这些不能从checkpoint重新恢复 如果想启动检查点的时候使用这两个变量,就需要创建这写变量的懒惰的singleton实例. 下面是一个例子: def getWordBlacklist(sparkContext): if ('wordBlacklist' not in globals()): globals()['wordBlacklist'] = sparkContext.broadcast(["a", &…
转载自:http://placement.freshersworld.com/power-preparation/technical-interview-preparation/os-interview-questions-23351 1. What is an operating system? An operating system is a program that acts as an intermediary between the user and the computer hard…
Stabilize an Unsupervised Feature Learning for LiDAR-based Place Recognition Peng Yin, Lingyun Xu, Zhe Liu, Lu Li, Hadi Salman, Yuqing He Abstract— Place recognition is one of the major challenges for the LiDAR-based effective localization and mappin…
转自:https://wso2.com/library/articles/2018/02/stream-processing-101-from-sql-to-streaming-sql-in-ten-minutes/ We have entered an era where competitive advantage comes from analyzing, understanding, and responding to an organization’s data. When doing…
说起DMA我们并不陌生,但是实际编程中去用的人不多吧,最多就是网卡驱动里的环形buffer,再有就是设备的dma,下面我们就分析分析.   DMA用来在设备内存和内存之间直接数据交互.而无需cpu干预  内核为了方便驱动的开发,已经提供了几个dma 函数接口.dma跟硬件架构相关,所以linux关于硬件部分已经给屏蔽了,有兴趣的可以深入跟踪学习. 按照linux内核对dma层的架构设计,各平台dma缓冲区映射之间的差异由内核定义的一个dma操作集 include/linux/dma-mappin…
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Linux has supported a large number of SMP systems based on a variety of CPUs since the 2.0 kernel. Linux has done an excellent job of abstracting away differences among these CPUs, even in kernel code. One important difference is how CPUs allow memor…
http://www.javaworld.com/article/2073352/core-java/simply-singleton.html JAVA DESIGN PATTERNS By David Geary The Singleton pattern is deceptively simple, even and especially for Java developers. In this classic JavaWorld article, David Geary demonstr…
GPU端到端目标检测YOLOV3全过程(下) Ubuntu18.04系统下最新版GPU环境配置 安装显卡驱动 安装Cuda 10.0 安装cuDNN 1.安装显卡驱动 (1)这里采用的是PPA源的安装方式,首先添加Graphic Drivers的PPA源,打开终端输入以下指令代码(添加PPA源并更新): sudo add-apt-repository ppa:graphics-drivers/ppa sudo apt-get update (2)使用命令行自动查看合适的驱动版本,系统会自动查找并…
TimeWall is a graph databases github It be used to apply mathematic model and social network with graph algorithms and so on... Features: 1. C/S structure 2. compute in memory 3. dynamic add and remove nodes on the graph db 4. with lots of algorithms…
初体验: 概率论为我们提供了一个衡量和控制不确定性的统一的框架,也就是说计算出了一大堆的概率.那么,如何根据这些计算出的概率得到较好的结果,就是决策论要做的事情. 一个例子: 文中举了一个例子: 给定一个X射线图x,目标是如何判断这个病人是否得癌症(C1或C2).我们把它看作是一个二分类问题,根据bayes的概率理论模型,我们可以得到: 因此,就是的先验概率:(假设Ck表示患病,那么就表示普通人患病的概率) 则作为是后验概率. 假设,我们的目标是:在给定一个x的情况下,我们希望最小化误分类的概率…
原版地址:http://code.angularjs.org/1.0.2/docs/guide/concepts 继续.. 一.总括 本文主要是angular组件(components)的概览,并说明他们如何工作.列表如下: statup - 依旧是hello world...改为Hello Kitty! runtime - 介绍angular的runtime scope - view与contorller的纽带(神马glue...胶) controller - app的行为(applicati…
@{ Layout = null; } <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width" /> <title></title> <script src="~/Scripts/angular.js"></script> <script t…
angular中指令被用的最多的除了ng-repeat之外就非他莫属了吧,由于各种业务的需求,我们经常需要去写一些继承ngModel的指令,来满足各种奇葩需求,最多的莫过于表单的验证啦,另外你在封装一些jquery插件的时候,也是需要继承ngModel的,最典型的莫过于 datepicker.fileUpload等等. 但是ngModel本身其实有很多坑,在这里分享给大家,如果大家又遇到其他问题,欢迎补充: 首先我们要知道一些概念的东西,这里我就不占篇幅了,不了解的可以先去看看这篇文章: htt…
在深入了解Java虚拟机里读到:在try{}块里面执行代码,比if(x!=null)效率要高,前提是被catch的几率很低的情况下. 但是 在Effective Java里读到:因为异常机制的设计初衷是用于不正常的情形,所以很少会有JVM实现视图对他们进行优化,使得与显示的测试一样快速.把代码放在try-catch块中反而阻止了现代JVM实现本来可能要执行的某些特定优化.对数组进行遍历的标准模式并不会导致冗余的检查.有些现代的JVM实现会将他们优化掉.实际上在现代的JVM实现上,给予异常的模式比…
每每以为攀得众山小,可.每每又切实来到起点,大牛们,缓缓脚步来俺笔记葩分享一下吧,please~ --------------------------- R语言H2o包的几个应用案例 笔者寄语:受启发想了解H2o平台的一些R语言实现,网上已有一篇H2o的demo文件.笔者在这多贴一些案例,并且把自己实践的一些小例子贴出来. 关于H2o平台长啥样,可以看H2o的官网,关于深度学习长啥样,可以看一些教程,比如ParallelR博客之中的解析. 下面主要是贴几个案例,让大家看看. ----------…
一.概述 在上二篇中,主要是介绍了asp.net core mvc中路由的使用,这篇继续介绍路由在ASP.NET Core Razor中的使用.Razor Pages应该使用默认的传统路由,从应用程序的Pages文件夹中提供命令资源.还可以使用其他约定来自定义 Razor Pages 路由行为. 在ASP.NET Core MVC 中是使用路由中间件来匹配传入请求的 URL 并将它们映射到操作(action).而ASP.NET Core  Razor使用页面路由和应用模型提供程序约定,来控制 R…
原文地址 本文列出了 .NET 开源开发项目(open source developer projects).意在包括对开发过程的所有方面有所帮组的项目.对于消费项目(consumer projects),请参阅 .NET开源消费项目清单. 下面按字母排序,并提供一行文字说明.GitHub/CodePlex(或其他)链接优先. .NET 实现 .NET Core - Core .NET 框架 C# Native – 把 C# 编译成本地代码. Cosmos - C# 开源的管理操作系统,一个操作…
Github用法 git-recipesGit recipes in Chinese. 高质量的Git中文教程. lark怎样在Github上面贡献代码 my-git有关 git 的学习资料 gitignore非常赞 有用的.gitignore模板集合(忽略上传的文件集合),包含了各种语言. 完整App@ open-source-ios-apps- iOS开源App集合,分:swift与Objective-C--国外人整理. NewsBlur作者独自一个人 Samuel Clay 做出来的一款名…
import keras from keras.datasets import mnist from keras.models import Sequential from keras.layers import Dense, Activation, Flatten from keras.layers import Conv2D, MaxPooling2D, UpSampling2D import matplotlib.pyplot as plt from keras import backen…