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paper1007
利用样本协方差矩阵特征值分解实现双通道SAR动目标检测.pdf(Dual Channels SAR Ground Moving Target Detection with
Eigen-decomposition of the Sample Covariance Matrix)
- 2012-07-29 13:21:49下载
- 积分:1
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11087 统计逆序对
说明: Description
设a[0…n-1]是一个包含n个数的数组,若在ia[j],则称(i, j)为a数组的一个逆序对(inversion)。
比如 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, 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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solve_equations
几个使用的解线性方程组的程序,包括高斯消去法,高斯列主元法,高斯——赛德尔消去法。简明实用。(Gauss elimaination, Gauss_seidel ellimination)
- 2013-12-08 17:42:57下载
- 积分:1
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nlms
Echo cancellation using NLMS adaptive filter
- 2021-03-18 13:19:20下载
- 积分:1
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learn_struct_K2
本程序是贝叶斯网络结构学习的K2算法程序,可获取离散变量的贝叶斯网络(This procedure is K2 Bayesian network structure learning algorithm program, available discrete variables Bayesian Network)
- 2015-11-30 20:29:15下载
- 积分:1
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TESTGLP0
计算天体力学中常用的HANSEN函数,对偏心率小于0.1时适用(This code for hansen function )
- 2012-04-06 16:23:13下载
- 积分:1
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ren_GPC-PID
广义预测控制算法仿真,通过最小二乘法对系统进行在线辨识,并与PID对比,能运行的(Generalized predictive control algorithm simulation, through the of least squares method for on-line identification system, can run)
- 2012-05-02 17:57:18下载
- 积分:1
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App Entropy
近似熵和互近似熵的matlab代码,用于脑波分析很有用(Approximate entropy and cross approximate entropy matlab code for brain wave analysis useful)
- 2012-09-09 12:35:29下载
- 积分:1
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phase-field
说明: 用相场法模拟晶粒的长大的一个程序,用c++编写的,(a program simulation the grain growth by Phase field written using c++)
- 2021-03-02 11:39:34下载
- 积分:1
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AHP
说明: 层次分析法:计算代码在8文件中最后一页上,有实例。(AHP)
- 2009-08-30 01:00:59下载
- 积分:1