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bline-interp
编写了一个用于二维水深插值的双线性插值的fortran程序,用于水深的插值计算,内有验证的算例(Write a fortran program for two-dimensional depth interpolation bilinear interpolation, interpolation calculation for water depth, within a verification example)
- 2021-03-18 10:09:19下载
- 积分:1
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光孤子传播过程 非线性薛定谔方程
说明: 本模拟是采用分步傅里叶的解,求光孤子在光线内传输过程数值求解薛定谔方程。方程是激光器在光纤中传输的过程。(In this simulation, the fractional Fourier solution is used to solve the Schrodinger equation. The equation is the process of laser transmission in fiber.)
- 2020-03-11 18:35:53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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TC
说明: 非常好的地形改正程序,只需要有点位的经纬度,重力值和高程,内附例子和说明。(Program to compute terrain effects on gravimetric quantities.various modes of terrain effects may be computed)
- 2010-06-30 17:29:28下载
- 积分:1
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二维网格划分
说明: 划分naca0012网格,其中interfunction为翼型函数(compute mesh for naca0012 airfoil in matlab)
- 2020-06-11 08:51:04下载
- 积分:1
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juxingshuangjijisuane
Matlab计算生成双脊波导截止频率的源程序(Matlab calculation to generate double-ridged waveguide cut-off frequency of the source)
- 2012-11-08 19:26:40下载
- 积分:1
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fitqr
说明: 基于矩阵QR分解的最小二乘拟合MATLAB源程序(based on QR decomposition of the matrix least squares fitting MATLAB source )
- 2006-05-12 21:57:50下载
- 积分:1
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CS_OMP_my_final
CS算法OMP该进算法,对傅里叶与 的信号进行稀疏采样(Compressive Sensing OMP)
- 2013-10-22 18:36:26下载
- 积分:1
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minimal-path-sets
可靠性-最小路集-编程
计算图的最小路集,是装备可靠性课程的一个作业。(Reliability- minimal path sets- programming calculation of minimal path sets, equipment reliability courses a job.)
- 2013-03-12 19:02:53下载
- 积分:1
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Crank-Nicholson
关于一的微分方程数值解,一维波动方程初边值问题Crank-Nicholson格式,及追赶法(On one of the numerical solution of differential equations, one-dimensional wave equation Crank-Nicholson format, and to catch up with the Law)
- 2008-05-08 23:46:39下载
- 积分:1