diff():求差分 一阶差分 X = [1 1 2 3 5 8 13 21]; Y = diff(X) 结果: Y = 0 1 1 2 3 5 8 X = [1 1 1; 5 5 5; 25 25 25]; Y = diff(X) X = 1 1 1 5 5 5 25 25 25 结果: Y = 4 4 4 20 20 20 多阶差分 创建一个向量,然后计算元素之间的二阶差分. X = [0 5 15 30 50 75 105]; Y1= diff(X,2) Y = diff(X,2) Y1

2016年12月4日 星期日 --出埃及记 Exodus 20:25 If you make an altar of stones for me, do not build it with dressed stones, for you will defile it if you use a tool on it.你若为我筑一座石坛,不可用凿成的石头,因你在上头一动家具,就把坛污秽了.

提示20. 怎样处理固定长度的主键 这是正在进行中的Entity Framework提示系列的第20篇. 固定长度字段填充: 如果你的数据库中有一个固定长度的列,例如像NCHAR(10)类型的列,当你进行一次插入时,填充会自动发生.所以例如如果你插入'12345',你将得到5个自动填充的空格,来创建一个10个字符长度的字符串. 大多数情况下,这种自动填充不会有问题.但是在使用Entity Framework时如果你使用这些列的一个作为你的主键,你可能会在进行标识识别(identity resol

说在前面: 1.视频教程:https://www.bilibili.com/video/av60445113/?spm_id_from=333.788.videocard.0 2.老师的源码:https://github.com/longway777/Android-2019-Demo-CalculationTest 3.我的源码:https://github.com/xiaotian12-call/Learning/tree/0c345ee43df1f3bb0bc161087880b416a5

题目地址 https://pta.patest.cn/pta/test/16/exam/4/question/677 5-15 PAT Judge   (25分) The ranklist of PAT is generated from the status list, which shows the scores of the submissions. This time you are supposed to generate the ranklist for PAT. Input Spe

关于如何用UnixBench,介绍文章很多,这里就不展开了.这里重点描述下它是如何算分的. 运行参数 碰到很多客户,装好后,直接./Run,就把结果跑出来了,然后还只取最后一个分值,比谁高谁低.下面列一下4C8G的结果: ------------------------------------------------------------------------ Benchmark Run: 一 6月 25 2018 20:25:47 - 20:54:19 4 CPUs in system;

本周psp进度 11月25号 内容 开始时间 结束时间 打断时间 净时间 处理数据集  9:27  11:34  12m  115m 11月27号 内容 开始时间 结束时间 打断时间 净时间  scrum会议  12:00  12:30  0  30m 查找特征提取资料 14:20 16:56 14m 146m 11月28号 内容 开始时间 结束时间 打断时间 净时间  scrum会议  12:00  12:30  0  30m  Python学习  9:30  11:34  约10m  114

题目:输入一个矩阵,按照从外向里以顺时针的顺序依次打印出每一个数字.例如:如果输入如下矩阵:1  2  3  4 5  6  7  89  10  11  1213  14  15  16则依次打印出数字1.2.3.4.8.12.16.15.14.13.9.5.6.7.11.10. 测试用例: 数组有多行多列,数组只有一行,数组中只有一列,数组中只有一行一列   代码实现: package com.yyq; /** * Created by Administrator on 2015/9/16.

This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was captured by a group of drug dealers. He was sent to a small piece of land at the center of a lake filled with crocodile

The ranklist of PAT is generated from the status list, which shows the scores of the submissions. This time you are supposed to generate the ranklist for PAT. Input Specification: Each input file contains one test case. For each case, the first line

1030. 完美数列(25) 时间限制 300 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CAO, Peng 给定一个正整数数列,和正整数p,设这个数列中的最大值是M,最小值是m,如果M <= m * p,则称这个数列是完美数列. 现在给定参数p和一些正整数,请你从中选择尽可能多的数构成一个完美数列. 输入格式: 输入第一行给出两个正整数N和p,其中N(<= 105)是输入的正整数的个数,p(<= 109)是给定的参数.第二行给出N个

The ranklist of PAT is generated from the status list, which shows the scores of the submissions. This time you are supposed to generate the ranklist for PAT. Input Specification: Each input file contains one test case. For each case, the first line

笔记记录自林晓斌(丁奇)老师的<MySQL实战45讲> (本篇内图片均来自丁奇老师的讲解,如有侵权,请联系我删除) 20) --幻读是什么,幻读有什么问题? 我们先来看看表结构和初始化数据: CREATE TABLE `t` ( `id` int(11) NOT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, PRIMARY KEY (`id`), KEY `c` (`c`) ) ENGINE=InnoDB; insert i

This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was captured by a group of drug dealers. He was sent to a small piece of land at the center of a lake filled with crocodile

This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was captured by a group of drug dealers. He was sent to a small piece of land at the center of a lake filled with crocodile

The ranklist of PAT is generated from the status list, which shows the scores of the submissions. This time you are supposed to generate the ranklist for PAT. Input Specification: Each input file contains one test case. For each case, the first line

05-图2. Saving James Bond - Easy Version (25) 时间限制 200 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue This time let us consider the situation in the movie "Live and Let Die" in which James Bond, the world's most famous spy, was capture

A1075 PAT Judge (25)(25 分) The ranklist of PAT is generated from the status list, which shows the scores of the submittions. This time you are supposed to generate the ranklist for PAT. Input Specification: Each input file contains one test case. For

题目链接 题目描述 JOIOI 王国是一个 $H$ 行 $W$ 列的长方形网格,每个 $1\times 1$ 的子网格都是一个正方形的小区块.为了提高管理效率,我们决定把整个国家划分成两个省 $JOI$ 和 $IOI$ . 我们定义,两个同省的区块互相连接,意为从一个区块出发,不用穿过任何一个不同省的区块,就可以移动到另一个区块.有公共边的区块间可以任意移动.我们不希望划分得过于复杂,因此划分方案需满足以下条件: 区块不能被分割为两半,一半属 $JOI$ 省,一半属 $IOI$ 省. 每个省必须

今天刚刚到学校,2017年学习正式开始了,今天看到了浙大的<数据结构>这学期又要开课了,决定一定要跟着学习一遍:在大学生mooc网上学习:http://www.icourse163.org/course/zju-93001#/info :然后就是跟着<算法之美>也要同步看完. 然后就在PAT上随便做一道题,这是第一次通过AC,发现了两个比较好的博客主页:http://www.liuchuo.net/  和  https://www.joyhwong.com/   都总结了刷题的过程