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Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. For example,MovingAverage m = new MovingAverage(3);m.next(1) = 1m.next(10) = (1 + 10) / 2m.next(3) = (1 + 10 + 3) / 3m.next(5) = (10 + 3…
Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. For example,MovingAverage m = new MovingAverage(3);m.next(1) = 1m.next(10) = (1 + 10) / 2m.next(3) = (1 + 10 + 3) / 3m.next(5) = (10 + 3…
本文介绍一种利用移动最小二乘法来实现图像变形的方法,该方法由用户指定图像中的控制点,并通过拖拽控制点来驱动图像变形.假设p为原图像中控制点的位置,q为拖拽后控制点的位置,我们利用移动最小二乘法来为原图像上的每个像素点v构建相应的仿射变换lv(x),并通过该变换来计算得到图像变形后的位置: 其中权重wi的表达式为wi = 1/|pi - v|2α. 仿射变换lv(x)由两部分组成lv(x) = xM + T,其中M为线性转换矩阵,T为平移量.事实上将最小化表达式对变量T求偏导后可以得到T的表达式T…
#import <Foundation/Foundation.h> @interface Test : NSObject /** * 默认的就是__strong,这里只是做示范,实际使用时,不用写. * * @param obj <#obj description#> */ - (void)setObject:(id __strong)obj; @end #import "Test.h" @interface Test(){ id __strong obj_;…
NSString *str1 = @"字符串1"; NSString *str2 = @"字符串2"; //在同样条件下,Objective的字符串拼接 往往只有用 系统方法/格式化 //way 1 格式化 NSString *fullStr = [NSString stringWithFormat:@"%@%@",str1,str2]; //way 2 使用方法追加 NSString *fullStr = [str1 stringByAppen…
原题链接在这里:https://leetcode.com/problems/moving-average-from-data-stream/ 题目: Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. For example, MovingAverage m = new MovingAverage(3); m.next(1…
转自: http://blog.liuhongwei.cn/iphone/objective-c/ 进军iPhone开发,最大的难点之一就是怪异的Objective C语法了.不过,了解之后才发现,原来仅仅是形式上与C++.Java有差异,属于换汤不换药.如果有C语言基础,又用过C++.Java,2天之内掌握Objective C,没有问题,至少看例子程序会感觉顺眼很多. Objective C脱胎于C语言,苹果版的开发编译环境就是大名鼎鼎的Xcode,其中的Cocoa就是Objective C…