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MOM-RCS
矩量法实例 计算细导线的雷达散射截面,PPT资料(Instance of the method of moments to calculate the radar cross section of thin wire)
- 2021-04-04 21:29:04下载
- 积分:1
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Lingo11
lingo软件分享,lingo是专门用于解决规划问题的数值计算工具,操作简便(Lingo Software Sharing, Lingo is a numerical calculation tool specially used to solve planning problems. It is easy to operate.)
- 2020-06-22 11:40:01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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oofem-1.7.tar
c++的有限元源码,带说明书和测试数据,是难得的有限元开发资料.(This is the code of finite element method, with manual document and data samples, it is valusble for FEM development)
- 2009-04-25 13:59:51下载
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Sola
Fortran编写的VOF经典算法,SOLA-VOF(VOF classical algorithms written in Fortran, SOLA-VOF)
- 2021-01-17 23:38:48下载
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cylinder-scattering
此程序为基于时域有限差分法的matlab程序,主要是计算二维MUR吸收方柱散射(This procedure is based on finite difference time domain method matlab program, mainly of two-dimensional scattering MUR absorbing square columns)
- 2011-07-14 21:03:15下载
- 积分:1
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二阶循环,去同频,不去相干
说明: 利用二阶循环统计量去除同频带干扰的影响,同时,当信号为相干信号时,也可以去相关,得到较好的结果,(Using second-order cyclic statistics to remove the influence of interference in the same frequency band)
- 2019-11-22 10:02:16下载
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utmc
本程序用于生成高质量的网格,可用于有限元,有限体积等方法的前处理。(This procedure is used to generate high-quality mesh, can be used for finite element, finite volume methods such as pre-processing.)
- 2017-08-10 11:24:49下载
- 积分:1
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3361621dingwei
进行干扰源以及声源定位的时延估计技术,以及定位迭代算法(Sources of interference and delay estimation techniques for sound source localization, as well as positioning iterative algorithm)
- 2012-10-08 20:47:28下载
- 积分:1
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Wilson_angle
wilson_theta法计算地震波matlab程序(wilson_theta calculation matlab program of seismic waves)
- 2012-11-01 00:21:15下载
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