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MM_VIV
用无网格法计算VAN DE POL 振子(calculate van de pol oscillator by using meshless method)
- 2009-04-26 20:17:19下载
- 积分:1
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valve
说明: 一个在fluent udf中使用Compute_Force_and_Moment函数计算力的算例(An Example of Compute_Force_and_Moment Function in Fluent UDF)
- 2020-06-19 14:14:38下载
- 积分:1
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ANSYScalculating-the-cylinder-craze
这是ansys里面apdl语言,用于计算圆柱体开裂(This is the ansys inside apdl language, used for calculating the cylinder craze)
- 2012-07-02 20:40:35下载
- 积分:1
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zjbhydm
正交变换源程序,带vc工程。 学习正交变换算法的有力工具。(Orthogonal transformation source code, with vc works. Orthogonal transformation algorithm to learn a powerful tool.)
- 2008-04-01 22:53:07下载
- 积分:1
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EmFDTD-v1.2r1
一组很好的FDTD计算二维光子带隙的程序,matlab 7.0以上版本适用(a good group of FDTD calculation of two-dimensional photonic bandgap procedures, Matlab 7.0 and above versions of the application)
- 2007-02-04 02:02:47下载
- 积分:1
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imm
说明: 本程序是matlab编写的imm(交互式多模型算法)目标跟踪程序。这种方法的特点是在各模型之间“转换”,自动调节滤波带宽,和适合机动目标的跟踪。(This program is matlab written imm (interacting multiple model algorithm) target tracking program. This method is characterized among the various models " conversion" , automatically adjust filter bandwidth, and suitable for maneuvering target tracking.)
- 2009-09-03 20:58:09下载
- 积分:1
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NearToFar
该程序用fortran90编写,时域有限差分(FDTD)中的近远场变换方法。解决了电磁波后向散射中的RCS计算(FORTRAN90 prepared with the program, finite difference time domain (FDTD) in the near field to far field transformation method. Resolved backscattering of electromagnetic waves in the RCS calculation)
- 2008-06-07 19:21:59下载
- 积分:1
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FFT
fft变换后求出主频,FFT transform to calculate frequency
- 2013-06-08 21:49:58下载
- 积分:1
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LU
说明: 数学工具:
LU分解法解线性方程组,很好用(Mathematical tools: LU decomposition solution of linear equations, a very good use)
- 2008-06-10 14:06:12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