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hunhefahanshufa
罚函数法 它将有约束最优化问题转化为求解无约束最优化问题: 其中M为足够大的正数, 起"惩罚"作用, 称之为罚因子, F(x, M )称为罚函数.(hunhefahanshufa)
- 2020-12-02 01:49:27下载
- 积分:1
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tsvd
截断奇异值分解技术是一种正则化方法,用于不适定问题的数值计算(Truncated Singular Value Decomposition is a regularizaiton method for ill-conditioned problem computation.)
- 2020-08-13 23:18:26下载
- 积分:1
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random_position
说明: 关闭OFDM信号子载波,画出OFDM信号频谱图,查看旁瓣泄露情况(Close OFDM signal sub-carrier OFDM signal spectrum plot, view the situation sidelobe leakage)
- 2011-04-03 22:21:37下载
- 积分:1
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TVD
一维波动方程TVD格式源程序,空间二阶精度,附带计算结果及说明(One-dimensional wave equation TVD scheme source, space second-order accuracy, with results and instructions)
- 2011-08-22 20:00:24下载
- 积分:1
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11087 统计逆序对
Description
设a[0…n-1]是一个包含n个数的数组,若在i<j的情况下,有a[i]>a[j],则称(i, j)为a数组的一个逆序对(inversion)。
比如 <2,3,8,6,1> 有5个逆序对。请采用类似“合并排序算法”的分治思路以O(nlogn)的效率来实现逆序对的统计。
一个n个元素序列的逆序对个数由三部分构成:
(1)它的左半部分逆序对的个数,(2)加上右半部分逆序对的个数,(3)再加上左半部分元素大于右半部分元素的数量。
其中前两部分(1)和(2)由递归来实现。要保证算法最后效率O(nlogn),第三部分(3)应该如何实现?
此题请勿采用O(n^2)的简单枚举算法来实现。
并思考如下问题:
(1)怎样的数组含有最多的逆序对?最多的又是多少个呢?
(2)插入排序的运行时间和数组中逆序对的个数有关系吗?什么关系?
输入格式
第一行:n,表示接下来要输入n个元素,n不超过10000。
第二行:n个元素序列。
输出格式
逆序对的个数。
输入样例
5
2 3 8 6 1
输出样例
5(Set a[0... N-1] is a n array containing n numbers. If there is a [i] > a [j] i n the case of I < j, then (i, j) is a n inversion pair of a array.
For example, <2,3,8,6,1> has five reverse pairs. Please use the idea of "merge sorting algorithm" to achieve the statistics of inverse pairs with O (nlogn) efficiency.
The number of inverse pairs of a sequence of n elements consists of three parts:
(1) The number of reverse pairs in the left half, (2) the number of reverse pairs in the right half, (3) the number of elements in the left half is greater than that in the right half.
The first two parts (1) and (2) are implemented by recursion. To ensure the final efficiency of the algorithm O (nlogn), how should the third part (3) be implemented?
Do not use O (n ^ 2) simple enumeration algorithm to solve this problem.)
- 2019-01-07 23:52:06下载
- 积分:1
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多目标蚁群算法
多目标蚁群算法用来求解多目标最小生成树问题(Multi-objective ant colony algorithm)
- 2017-11-28 09:47:16下载
- 积分:1
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Matrix Computations 4th edition.pdf
矩阵计算英文版第4版,经典,经典,很不错!!!!!请下载!!!!!!(Matrix Computing English Version 4, classic, classic, very good!!!! Please download!!!!!!)
- 2020-06-23 22:20:02下载
- 积分:1
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jobshop
车间调度问题主程序,需要进行自主参数设计(Shop scheduling problem the main program, the need for self-Parameter Design)
- 2008-04-07 20:28:10下载
- 积分:1
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003
a very easy .c file for calculating the products of ints
- 2012-08-14 09:52:45下载
- 积分:1
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relax
谐波检测的RELAX算法,优于FFT,能够对幅值,频率,相位进行有效估计(an algorithm for estimation of sinusoid parameter)
- 2021-01-17 15:48:45下载
- 积分:1