昨天在检查YourSQLDba备份时,发现有台数据库做备份时出现了下面错误信息,如下所示: <Exec>   <ctx>yMaint.ShrinkLog</ctx>   <inf>Log Shrink</inf>   <Sql> --  ======================================================================== -- Shrink of log file E:\SQ…

p.MsoNormal { margin: 0pt; margin-bottom: .0001pt; text-align: justify; font-family: Calibri; font-size: 10.5000pt } h1 { margin-top: 5.0000pt; margin-bottom: 5.0000pt; text-align: center; font-family: 宋体; color: rgb(26,92,200); font-weight: bold; fo…

一.进程与线程 1.进程 进程是指在系统中正在运行的一个应用程序,每个进程之间是独立的,每个进程均运行在其专用且受保护的内存空间内: 如果我们把CPU比作一个工厂,那么进程就好比工厂的车间,一个工厂有好多个车间,每个车间都在进行不同的工作,它们之间是独立互不干扰的. 2.线程 线程是进程的基本执行单元,一个进程的所有任务都在线程中执行:一个进程要想执行任务,必须得有线程(每个进程至少要有1条线程): 线程就好比车间里的工人,一个车间里可以有好多工人(一个进程可以包括多个线程),他们协同完成一个任…

Modeling Algorithms Boolean Operations of Opencascade eryar@163.com 布尔操作(Boolean Operations)是通过两个形状(S1,S2)的组合来生成新的形状.布尔操作有如下几种类型: u 并集操作Fusion:Gets all the points in S1 or S2; u 交集操作Common:Gets all the points in S1 and S2; u 差集操作Cut S1 by S2:Gets all…

“矩阵代数初步”(Introduction to MATRIX ALGEBRA)课程由Prof. A.K.Kaw(University of South Florida)设计并讲授. PDF格式学习笔记下载(Academia.edu) 第4章课程讲义下载(PDF) Summary Transpose Let $[A]$ be a $m\times n$ matrix. Then $[B]$ is the transpose of $[A]$ if $b_{ji} = a_{ij}$ for al…

“矩阵代数初步”(Introduction to MATRIX ALGEBRA)课程由Prof. A.K.Kaw(University of South Florida)设计并讲授. PDF格式学习笔记下载(Academia.edu) 第3章课程讲义下载(PDF) Summary Addition of matrices Two matrices $[A]$ and $[B]$ can be added only if they are the same size. The addition i…

mouse scrollings and zooming operations in linux & windows are opposite. windows中, 鼠标滚动的方向是: 查看页面下方的内容,乡下划动; 而linux中, 要查看页面下方的内容, 要用手指向上划动; windows中, 缩放的方向也不同, windows中, 向上表示放大, 而linux中, 向下才是放大.. 在更新dnf的时候, 出现 不能连接到163. 或者, 不能下载 repodata下的某个文件, 多数情况下…

MongoDB使用BSON文件存储在collection中,本文主要介绍MongoDB中的写操作和优化策略. 主要有三种写操作:        Create        Update        Delete Create:可以分为两种基本操作——insert和updates with the upsert option Insert() BSON文件最大为16M:_id通常作为主key为了测试写操作是否成功,可以调用getLastError函数{ getLastError: 1 } db.…

本文主要介绍内容:从MongoDB中请求数据的不同的方法 Note:All of the examples in this document use the mongo shell interface. All of these operations are available in an idiomatic interface for each language by way of the MongoDB Driver. See your driver documentation for fu…

[codeforces 339]D. Xenia and Bit Operations 试题描述 Xenia the beginner programmer has a sequence a, consisting of 2n non-negative integers: a1, a2, ..., a2n. Xenia is currently studying bit operations. To better understand how they work, Xenia decided t…

一直想努力向别人(甚至包括从事运维的人)解释清楚什么是运维,发现很难! 6月20号,在InfoQ高效运维群里面,对运维创业做了一次激烈的讨论,很自然地,过程中不可避免的谈到运维苦逼和运维无法产品化的问题,这是一些运维需要说服自己,证明自己价值的问题.对于本人来说,运维的价值不容置疑,只要我们运维人能自我认识突破,更体系化的站在业务角度看待运维价值问题,那我们就不是一个苦逼的成本部门.此时我自然的想到了[IT运营],它带来的视界会更加开阔,能够帮助更好的重新认识运维. 一.运维是什么 运维从IT软…

介绍 drupal通常用views制作列表,列表也应该能实现某些操作,例如删除.审批等,并且应该是批量进行的,VBO的存在就是为了实现views批量操作功能.事实上,drupal把操作统称为action,而VBO的原理仅仅是把views与action关联起来. 使用步骤(来源于官方) 1. Create a View.2. Add a "Bulk operations" field if available3. Configure the field. There's a "…

Background After awesome response of an published by me in the year 2013: Insert, Update, Delete In GridView Using ASP.Net C#. It now has more than 140 K views, therefore to help beginners I decided to rewrite the article i with stepbystep approach u…

Xenia and Bit Operations time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Xenia the beginner programmer has a sequence a, consisting of 2n non-negative integers: a1, a2, ..., a2n. Xenia is…

Now in this article I will show how to do Create, Retrieve, Update and Delete (CRUD) operations in MVC4 using AngularJS and WCF REST Services. The following are the highlights of this article: Create a Database. (SchoolManagement). Create a Table (St…

The advantages of Array Addition and subtraction Array multiplication abs() & sqrt() Converting between array and matrix expressions     The advantage of Array provides an easy way to perform coefficient-wise operations, such as adding a constant to…

Using block operations rvalue, i.e. it was only read from lvalues, i.e. you can assign to a block Columns and rows Corner-related operations Block operations for vectors Using block operations Block operation Version constructing a  dynamic-size bloc…

题目传送门 /* 线段树的单点更新:有一个交叉更新,若rank=1,or:rank=0,xor 详细解释:http://www.xuebuyuan.com/1154895.html */ #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> #include <string> #include <cmath> #include <…

Comparison of the different algorithms for  Polygon Boolean operations. Michael Leonov 1998 http://www.angusj.com/delphi/clipper.php#screenshots http://www.complex-a5.ru/polyboolean/comp.html http://www.angusj.com/delphi/clipper.php#screenshots Intro…

You can do Select, Cut, Copy and Paste operations on text items in Oracle Forms using Select_All, Cut_Region, Copy_Region and Paste_Region commands through right click popup menu.   In this example I created a popup menu which is associated with the…

The ObjectContext instance has been disposed and can no longer be used for operations that require a connection. How to solve the error The ObjectContext instance has been disposed and can no longer be used for operations that require a connection 1.…

今天在做ssh项目开发的时候遇到一个问题,保存数据的时候报错: Write operations are not allowed in read-only mode (FlushMode.NEVER/ 后参考这篇文章才知道出了什么问题:http://www.aichengxu.com/view/37412 原来在Spring事务管理中save类的方法都没有read-only=true,但是我的方法是add*,所以就出现开头讲的问题,把add*方法改成save*就可以了. <!-- 配置事务策略…

使用Spring提供的Open Session In View而引起Write operations are not allowed in read-only mode (FlushMode.NEVER) 错误解决: 在没有使用Spring提供的Open Session In View情况下,因需要在service(or Dao)层里把session关闭,所以lazy loading 为true的话,要在应用层内把关系集合都初始化,如 company.getEmployees(),否则Hiber…

错误信息: org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition. 解决方法:…

(转+作者个人理解) 最近在配置 Structs, Spring 和Hibernate整合的问题: 开启OpenSessionInViewFilter来阻止延迟加载的错误的时候抛出了这个异常: org.springframework.dao.InvalidDataAccessApiUsageException错误 但是在我们开启OpenSessionInViewFilter这个过滤器的时候FlushMode就已经被默认设置为了MANUAL! 如果FlushMode是MANUAL或NEVEL,在操…

CRUD operations create, read, update, and delete documents. Create Operations Create or insert operations add new documents to a collection. If the collection does not currently exist, insert operations will create the collection. MongoDB provides th…

Mysql异常:MySQLNonTransientConnectionException: No operations allowed after statement closed MySQLNonTransientConnectionException: No operations allowed after statement closed 之所以会出现这个异常,是因为Mysql在5以后针对超长时间DB连接做了一个处理,那就是如果一个DB连接在无任何操作情况下过了8个小时后,Mysql会自动…

A Simple Problem with Integers 每次将区间向下更新,或是用之前的方法,统计当前节点到父节点处的覆盖数目. #include <cstdio> #include <iostream> using namespace std; ; typedef long long int64; int d[MAXN]; class SegNode { public: int L, R; int64 c, sum; int64 get_c() { ); } void lo…

A Product by Mixed Dimensions What is BooleanRT? BooleanRT is a real-time 3D boolean operations extension for Unity that allows you from executing 3D Boolean operations (Union, Intersection, Substract) during runtime or during level creation and edit…

[spring]:org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MA…