N-VAR 典礼;(宗教)仪式A ritual is a religious service or other ceremony which involves a series of actions performed in a fixed order. This is the most ancient, and holiest of the Shinto rituals... 这是最古老.最神圣的神道教仪式. 注意t不发音 Rosie's idyllic world came to an ab…

above 近义词: over, beyond, exceeding反义词: below, beneath, under, underneath 有从右往左写的文字,没有从下往上的.above-mentioned, above-described, above-cited, named-above, aforesaid, mentioned-above都是上(前)文提到的.mention, describe, cite都是词.afore也是词, a是词根,讲aboard时讲过了. 表示越过时只能…

引言 有时我们会在IIS中启用一些定时服务,但是你必须清楚IIS会定期回收Asp.net的应用程序的.首先来看IIS啥时候回收APPDomain.   APPDomain 回收时机 There are several things that can cause ASP.NET to tear down your AppDomain. When you modify web.config, ASP.NET will recycle the AppDomain, though the w3wp.ex…

原文地址:https://www.infoq.com/articles/rxjava-by-example Key takeaways Reactive programming is a specification for dealing with asynchronous streams of data Reactive provides tools for transforming and combining streams and for managing flow-control Mar…

Source: https://www.medicine.mcgill.ca/physio/vlab/biomed_signals/eeg_n.htm The electroencephalogram (EEG) is a recording of the electrical activity of the brain from the scalp. The recorded waveforms reflect the cortical electrical activity. Signal…

一.前言 JUC这部分还有线程池这一块没有分析,需要抓紧时间分析,下面开始ThreadPoolExecutor,其是线程池的基础,分析完了这个类会简化之后的分析,线程池可以解决两个不同问题:由于减少了每个任务调用的开销,它们通常可以在执行大量异步任务时提供增强的性能,并且还可以提供绑定和管理资源(包括执行任务集时使用的线程)的方法.下面开始分析. 二.ThreadPoolExecutor数据结构 在ThreadPoolExecutor的内部,主要由BlockingQueue和AbstractQu…

概要 在前面一章"Java多线程系列--"JUC线程池"02之 线程池原理(一)"中介绍了线程池的数据结构,本章会通过分析线程池的源码,对线程池进行说明.内容包括:线程池示例参考代码(基于JDK1.7.0_40)线程池源码分析(一) 创建"线程池"(二) 添加任务到"线程池"(三) 关闭"线程池" 转载请注明出处:http://www.cnblogs.com/skywang12345/p/3509954.h…

conscious[英][ˈkɒnʃəs][美][ˈkɑnʃəs]consensus[英][kənˈsensəs][美][kənˈsɛnsəs] scious sensuswaterflood; deluge; flood; flowage; Niagara; spill[英][spɪl][美][spɪl]spell[英][spel][美][spɛl] city urban emperemperortemper irritant Some had begun to build adjacent…

http://dojotoolkit.org/documentation/tutorials/1.10/effects/index.html In this tutorial, we will explore the effects that Dojo provides, which allow us to jazz up your page or application! 在本教程中,我们会探索dojo提供的特效功能,这可以使我们的Web页面或应用更加生动活泼. Getting Started…

2ed,  by Timothy Sauer DEFINITION 1.3A solution is correct within p decimal places if the error is less than 0.5 × 10$^{−p}$ .-P29Bisection Method的优点是计算次数(step)是确定的(interval<精度).后面介绍的算法的interval是不确定的, 所以什么时候结束计算呢?不知道.所以定义“stopping criteria’’来决定什么时候结束…

遇到的问题:使用的Appium界面的server进行启动,每次启动时都会安装Appium Setting和Unlock文件. 通过log可以看到安装路径如下:   Appium Setting安装包路径:/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/appium-android-driver/node_modules/io.appium.settings/bin/settings_apk-…

概要 在前面一章"Java多线程系列--“JUC线程池”02之 线程池原理(一)"中介绍了线程池的数据结构,本章会通过分析线程池的源码,对线程池进行说明.内容包括:线程池示例参考代码(基于JDK1.7.0_40)线程池源码分析(一) 创建“线程池”(二) 添加任务到“线程池”(三) 关闭“线程池” 转载请注明出处:http://www.cnblogs.com/skywang12345/p/3509954.html 线程池示例 在分析线程池之前,先看一个简单的线程池示例. import…

For a better environment, we should teach our children to put litter/garbage/trash into dustbin/dust pan. When he decided to study hard, his life had an abrupt change. He came to see me abruptly. Once she encounters danger, she'll show her mettle. I…

Radio Basics for RFID The following is excerpted from Chapter 3: Radio Basics for UHF RFID from the Book, The RF in RFID: Passive UHF RFID in Practice by Daniel M. Dobkin. Order a copy of The RF in RFID: Passive UHF RFID in Practice before December 3…

What Epanet cand and cannot do Good news!Epanet can do most of the calculations you may need for your project,andthose that Epanet cannot do are actually pretty easy to do on a piece fo paper,You willuse Epanet mainly for:    >Determining what pipes…

ThreadPoolExecutor几个重要的状态码字段 private static final int COUNT_BITS = Integer.SIZE - 3; private static final int CAPACITY = (1 << COUNT_BITS) - 1; // runState is stored in the high-order bits /* * RUNNING:可以接受新的任务,也可以处理阻塞队列里的任务 * SHUTDOWN:不接受新的任务,但是可以处…

Background Story: One of my friends recently called up and asked me if I had spare time to look at his database and give him a performance tuning advice. Because I had some free time to help him out, I said yes. I asked him to send me the details of…

转自:http://blog.csdn.net/lanbing510/article/details/40411877 有博主翻译了这篇论文:http://blog.csdn.net/roamer_nuptgczx/article/details/45790415 Factors that affect the performance of a tracing algorithm 1 Illumination variation 2 Occlusion 3 Background clutters…

转自:http://angryant.com/2014/03/07/Moving-in-Unity/ ,详细描述了物体在unity中移动的几种方式,并且给出了代码描述,对加深对Unity理解很有帮助,谢谢AngryAnt .我用我粗陋的英文水平进行简单的翻译,望谅解. Introduction Moving something around on the screen in Unity is really not that hard. The point of this post is ther…

Durability is a database feature that guarantees the recording of committed transactions even if the server crashes or loses power. However, durability adds significant database overhead, so if your site does not require such a guarantee, PostgreSQL…

留着以后看 原文地址:与catch的使用">java中try 与catch的使用作者:碌碌如玉 try{ //代码区 }catch(Exception e){ //异常处理 } 代码区如果有错误,就会返回所写异常的处理. 首先要清楚,如果没有try的话,出现异常会导致程序崩溃. 而try则可以保证程序的正常运行下去,比如说: try{ int i = 1/0; }catch(Exception e){ ........ } 一个计算的话,如果除数为0,则会报错,如果没有try的话,程序直接…

转自:http://liuzxc.github.io/blog/celery/ Celery 是一个简单.灵活且可靠的,处理大量消息的分布式系统,它是一个专注于实时处理的任务队列, 同时也支持任务调度.Celery 中有两个比较关键的概念: Worker: worker 是一个独立的进程,它持续监视队列中是否有需要处理的任务: Broker: broker 也被称为中间人或者协调者,broker 负责协调客户端和 worker 的沟通.客户端向 队列添加消息,broker 负责把消息派发给 wo…

Huge CSV and XML Files in Python January 22, 2009. Filed under python twitter facebook pinterest linkedin google+ I, like most people, never realized I'd be dealing with large files. Oh, I knew there would be some files with megabytes of data, but I…

1 引子try…catch…finally恐怕是大家再熟悉不过的语句了,而且感觉用起来也是很简单,逻辑上似乎也是很容易理解.不过,我亲自体验的“教训”告诉我,这个东西可不是想象中的那么简单.听话.不信?那你看看下面的代码,“猜猜”它执行后的结果会是什么?不要往后看答案.也不许执行代码看真正答案哦.如果你的答案是正确,那么这篇文章你就不用浪费时间看啦.public class TestException{    public TestException()    {    }    boolean…

整理自IEEE 754 IEEE二进制浮点数算术标准(IEEE 754)是20世纪80年代以来最广泛使用的浮点数运算标准,为许多CPU与浮点运算器所采用.这个标准定义了表示浮点数的格式(包括负零-0)与反常值(denormal number)),一些特殊数值(无穷(Inf)与非数值(NaN)),以及这些数值的"浮点数运算符":它也指明了四种数值舍入规则和五种例外状况(包括例外发生的时机与处理方式). IEEE 754规定了四种表示浮点数值的方式:单精确度(32位).双精确度(64位).…

#瓦登尔湖词频统计: import string path = 'D:/python3/Walden.txt' with open(path,'r',encoding= 'utf-8') as text: words = [raw_word.strip(string.punctuation).lower() for raw_word in text.read().split()] words_index = set(words) counts_dict = {index:words.count(…

在JavaScript中,想要判断某个对象值属于哪种内置类型,最靠谱的做法就是通过Object.prototype.toString方法. var arr = []; console.log(Object.prototype.toString.call(arr)) //"[object Array]" 本文要讲的就是,toString方法是如何做到这一点的,原理是什么. ECMAScript 3 在ES3中,Object.prototype.toString方法的规范如下: 15.2.…

aberration (n.) something that differs from the norm (In 1974, Poland won the World Cup, but the success turned out to be an aberration,and Poland have not won a World Cup since). abhor (v.) to hate, detest (Because he always wound up getting hit in…

I have always read that creating threads is expensive. I also know that you cannot rerun a thread. I see in the doc of Executors class: Creates a thread pool that creates new threads as needed, but will reuse previously constructed threads when they…

前面一篇文章从Executors中的工厂方法入手,已经对ThreadPoolExecutor的构造和使用做了一些整理.而这篇文章,我们将接着前面的介绍,从源码实现上对ThreadPoolExecutor在任务的提交.执行,线程重用和线程数维护等方面做下分析. 0.    ThreadPoolExecutor类的声明属性变量分析 1 public class ThreadPoolExecutor extends AbstractExecutorService 从这个类声明中我们可以看到java.u…