The small-displacement supercharged motor replaces the large-displacement motor with the speed of lightning, and the motor of 2.0L or above is the “large displacement” in the moment. More and more vehicles are merged into small-displacement motors. T…

The   Danfoss Motor     states that the motor sensor control system is the heart of the entire automotive sensor. It has many types, temperature sensors, pressure sensors, position and speed sensors, flow sensors, oxygen sensors and knock sensors. Th…

dynamic_cast是一个操作符,其用法不再赘述.查看汇编码可以发现实际调用的是这个函数__RTDynamicCast,其内部实现如下: rtti.h: #pragma once extern "C" { #include <windows.h> }; typedef const type_info TypeDescriptor; struct PMD { ptrdiff_t mdisp; //vftable offset ptrdiff_t pdisp; //vfta…

第一种: #include"iostream" #include"string" using namespace std; class Motor{ protected: int n; int tire; double motor; char *str1; //基类为指针 char *str2; public: ; }; class Car:public Motor{ public: Car(char *Str1,char *Str2,int N,int Tire,…

一.开篇 慢慢的.慢慢的.慢慢的就快要到飞控的主要部分了,飞控飞控就是所谓的飞行控制呗,一个是姿态解算一个是姿态控制,解算是解算,控制是控制,各自负责各自的任务.我也不懂.还在学习中~~~~ 近期看姿态预计部分看的太累了,明显发现基础知识太薄弱,什么欧拉角.DCM.四元数.gyro误差.矫正.正交化等各个概念.然后就是各种转换公式.接下来结合代码介绍一些主要的东西.太深入的还不了解~~~ 一定要多看论文啊,英文版的论文(也没有中文的.国人的悲哀啊).尽管看着头疼,看是看完了以后就会发现很多不了解…

    图例实解:C++中类的继承特性 整个c++程序设计全面围绕面向对象的方式进行,类的继承特性是c++的一个非常非常重要的机制,继承特性可以使一个新类获得其父类的操作和数据结构,程序员只需在新类中增加原有类中没有的成分. 可以说这一章节的内容是c++面向对象程序设计的关键. 下面我们简单的来说一下继承的概念,先看下图: 上图是一个抽象描述的特性继承表 交通工具是一个基类(也称做父类),通常情况下所有交通工具所共同具备的特性是速度与额定载人的数量,但按照生活常规,我们来继续给交通工具来细分类的…

#include <iostream> using namespace std; class Vehicle { public: Vehicle(float speed=0,int total=0) { Vehicle::speed = speed; Vehicle::total = total; } protected: float speed;//速度 int total;//最大载人量 }; class Motor { public: Motor(char *motor) { Motor…

#ifndef CONFIG_H_ #define CONFIG_H_ /**************************************************************************/ /**** CONFIGURABLE PARAMETERS ****/ /**** 可配置参量 ****/ /**** ****/ /**** 2013.10.28最新MWC程序注释翻译 ****/ /**** Translater:Dexter ****/ /**** 本…

This library allows you to control unipolar or bipolar stepper motors. To use it you will need a stepper motor, and the appropriate hardware to control it. For more on that, see Tom Igoe's notes on steppers. 函数 Stepper(steps, pin1, pin2)            步…

Crank connecting rod type low speed high torque hydraulic motor is used earlier, which is called Staffa hydraulic motor abroad. JMZ, the same type in China, has the rated pressure of 16MPa, the highest pressure of 21MPa and the maximum theoretical di…

手写单字体的识别,在看过卷积神经网络的mnist例子之后,很容易实现,那么如何实现多字体的同时识别呢? 如下图 LeCun大神所用的是SDNN space displacement neural network,这是什么鬼? 经过一番查询之后,原来它就是滑动窗口+图像金子塔+NMS,2015年yahoo的一篇论文 Multi-view Face Detection using deep convolutional Neural Networks 用的也是这种方法 参考页面:https://www…

转自:http://www.cnblogs.com/WizardWu/archive/2008/10/27/1320055.html 有些程序员在撰写数据库应用程序时,常专注于 OOP 及各种 framework 的使用,却忽略了基本的 SQL 语句及其「性能 (performance) 优化」问题.版工曾听过台湾某半导体大厂的新进程序员,所组出来的一段 PL/SQL 跑了好几分钟还跑不完:想当然尔,即使他的 AJAX 及 ooxx 框架用得再漂亮,系统性能也会让使用者无法忍受.以下是版工整理出…

http://www.myexception.cn/other/1397638.html DShader之位移贴图(Displacement Mapping) www.MyException.Cn   发布于:2013-10-08 16:38:32   浏览:37次 0   3DShader之移位贴图(Displacement Mapping) 我们知道法线贴图是只是改了物体的法线属性,用来计算光照,但是并没有改变物体本身的网格.但是移位贴图就不一样了,它会移动物体的顶点.我用移位贴图做了个海洋…

A Corrupt Mayor's Performance Art Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 100000/100000 K (Java/Others) Problem Description Corrupt governors always find ways to get dirty money. Paint something, then sell the worthless painting at a…

A Corrupt Mayor's Performance Art Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 100000/100000 K (Java/Others)Total Submission(s): 33    Accepted Submission(s): 11 Problem Description Corrupt governors always find ways to get dirty money. Pa…

转: http://venublog.com/2007/11/07/load-data-infile-performance/ I often noticed that people complain about the LOAD DATA performance when loading the table with large number of rows of data. Even today I saw a case where the LOAD DATA on a simple 3 c…

一.             SQL Interface1.         Select ... Where vs. Select + Check用Select … Where语句效率比Select + Check语句要高,例 如:SELECT * FROM SBOOK INTO SBOOK_WA WHERE CARRID = 'LH' AND        CONNID = '0400'.ENDSELECT. SELECT * FROM SBOOK INTO SBOOK_WA. CHECK:…

我们知道法线贴图是只是改了物体的法线属性,用来计算光照,但是并没有改变物体本身的网格.但是移位贴图就不一样了,它会移动物体的顶点.我用移位贴图做了个海洋,好了,上了图再讲: 注意看海的边缘的顶点,已经实现了移动 最后,添加了一个笛卡尔转球形坐标的函数将其转为球形坐标,到时候我会提供球形版本的源码,如果需要平面的只需要在shader将调用这个函数的语句注释掉即可. 好了,不啰嗦了,困得不行了! 类似于法线贴图,移位贴图的每一个纹素中存储了一个向量,这个向量代表了对应顶点的位移. 注意,此处的纹素并…

A Corrupt Mayor's Performance Art Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 100000/100000 K (Java/Others) Total Submission(s): 1905    Accepted Submission(s): 668 Problem Description Corrupt governors always find ways to get dirty money…

最近在给自己的服务器框架加上统计信息,其中一项就是统计创建的对象数,以及当前还存在的对象数,那么自然以对象名字作key.但写着写着,忽然纠结是用std::string还是const char *作key,哪个效率高些.由于这服务器框架业务逻辑全在lua脚本,在C++需要统计的对象没几个,其实用哪个没多大区别.我纠结的是,很久之前就知道这两者效率区别不大,但直到现在我都还没搞清楚为啥,于是写些代码来测试. V1版本的代码如下: #ifndef __MAP_H__ #define __MAP_H__…

在HelloDBA网站找到一个分析sql性能的工具—showplan,记录一下 showplan.sql下载路径:http://www.HelloDBA.com/Download/showplan.zip 使用方式就是调用该工具,传入SQL_ID作为参数. SQL> @/dmp/showplan.sql 26xj87b2f8g6u ---showplan.sql -- ################################################################…

http://acm.hdu.edu.cn/showproblem.php?pid=5023 Problem Description Corrupt governors always find ways to get dirty money. Paint something, then sell the worthless painting at a high price to someone who wants to bribe him/her on an auction, this seem…

Corrupt governors always find ways to get dirty money. Paint something, then sell the worthless painting at a high price to someone who wants to bribe him/her on an auction, this seemed a safe way for mayor X to make money. Because a lot of people pr…

http://www.ibm.com/developerworks/linux/library/l-async/?S_TACT=105AGX52&S_CMP=cn-a-l Introduction to AIO Linux asynchronous I/O is a relatively recent addition to the Linux kernel. It's a standard feature of the 2.6 kernel, but you can find patches…

1.1.  单片机代码处理 // 定义定时器预分频,定时器实际时钟频率为:72MHz/(STEPMOTOR_TIMx_PRESCALER+1) #define STEPMOTOR_TIM_PRESCALER          3  // 步进电机驱动器细分设置为:   32  细 // 定义定时器周期,输出比较模式周期设置为0xFFFF #define STEPMOTOR_TIM_PERIOD                  0xFFFF #define FALSE              …

Problem Description Corrupt governors always find ways to get dirty money. Paint something, then sell the worthless painting at a high price to someone who wants to bribe him/her on an auction, this seemed a safe way for mayor X to make money. Becaus…

The     Hydraulic Motor manufacturers    stated that the cycloidal hydraulic motor is fixedly connected to the housing by the ring gear, and the oil entering from the port pushes the rotor to revolve around a center point. This slow-rotating rotor dr…

Performance Tips 1.In this document Avoid Creating Unnecessary Objects 避免多余的对象 Prefer Static Over Virtual  多用static方法,它比其它方法快15%-20% Use Static Final For Constants   多用 static final 基本类型常量 Avoid Internal Getters/Setters   在类内部避免使用getter,setter而直接使用成员…

原文:http://www.javaworld.com/article/2077523/build-ci-sdlc/java-tip-26--how-to-improve-java-s-i-o-performance.html JDK 1.0.2 的 java.io 包暴露了非常多I/O性能问题.这里将介绍一个优化方案,附加一个关闭同步的方法. Java的I/O性能以前是非常多Java应用的瓶颈.主要原因就是JDK1.0.2的java.io包的不良设计和实现.关键问题是缓冲.绝大多数java.i…

原文地址:http://www.tocker.ca/2013/10/24/improving-the-performance-of-large-tables-in-mysql.html Today I wanted to take a look at improving the performance of tables that cause performance problems based largely on their size. Some of this advice also ap…