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转载 运动控制第一章

描述位置用一个位置矢量来描述空间中点的位置描述姿态为描述物体的位置,在物体上固定一个坐标系,并给出坐标系相对于参考系的表达。                    坐标系描述用它来描述坐标系B的位置和姿态坐标系的平移和旋转映射平移:旋转:

2015-10-09 19:37:33 647

原创 队列学习笔记

队列是一种先进先出的线性表。最典型的例子就是操作系统中的作业排队。每当通道传输完毕可以接受新的输出任务时,队头的作业先从队列中退出作输出操作。

2015-09-25 11:33:39 342

原创 汇编指令系统及其在单片机系统中的应用总结

指令分成两部分:操作码和操作数操作码:规定指令进行什么操作操作数:指令操作的对象,可以是一个具体数据,可以使取得数据的地址和符号1、指令格式标号:   操作码助记符   目的操作数,源操作数   ;注释2、80C51中常用的符号(标识符)Ri :用作间接寻址的寄存器,i=0或1Rn:当前工作寄存器中的工作寄存区,n = 0~7#data:包含在指令中

2015-09-24 09:49:19 1118

原创 栈与递归实现Hanoi塔问题

1、用递归方法实现Hanoi问题的源代码//将塔座x上按直径大小由小到大排为1——n,要求将塔座x上的n个圆盘搬至z塔座,可以以y为辅助塔#include "stdio.h"#include "stdafx.h"#include "stdlib.h"int c = 0;void move(char a, int n, char b){ printf("%i.Move d

2015-09-22 16:23:02 1778

原创 cocos-2dx v3.8 关于未定义标识符visibleSize的问题

但是显示visibleSize未定义,不知道有没有菜鸟碰到和我相同的问题,感觉最新的库里是没有这个结构的定义了吗(大神勿喷)找资料感觉好像没什么人提出过相关的,最后自己上谷歌在一个日本友人的博客上找到了解决办法

2015-09-15 10:56:30 2084

Thinking Critically About Researching Algorithms

More and more aspects of our everyday lives are being mediated, augmented, produced and regulated by software-enabled technologies. Software is fundamentally composed of algorithms: sets of defined steps structured to process instructions/data to produce an output. This paper synthesises and extends emerging critical thinking about algorithms and considers how best to research them in practice. Four main arguments are developed. First, there is a pressing need to focus critical and empirical attention on algorithms and the work that they do given their increasing importance in shaping social and economic life. Second, algorithms can be conceived in a number of ways – technically, computationally, mathematically, politically, culturally, economically, contextually, materially, philosophically, ethically – but are best understood as being contingent, ontogenetic and performative in nature, and embedded in wider socio-technical assemblages. Third, there are three main challenges that hinder research about algorithms (gaining access to their formulation; they are heterogeneous and embedded in wider systems; their work unfolds contextually and contingently), which require practical and epistemological attention. Fourth, the constitution and work of algorithms can be empirically studied in a number of ways, each of which has strengths and weaknesses that need to be systematically evaluated. Six methodological approaches designed to produce insights into the nature and work of algorithms are critically appraised. It is contended that these methods are best used in combination in order to help overcome epistemological and practical challenges.

2018-02-21

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