-
broyden迭代法和逆broyden迭代法
拟牛顿迭代法是相对比较新的一种方法,克服了牛顿迭代需要求导数和求逆的缺点,用于求解非线性方程组(For solving nonlinear equations)
- 2017-11-22 22:45:10下载
- 积分:1
-
SpaRSA
SpaRSA算法作为解决凸优化问题的重要方法,在压缩感知等领域具有重要应用,这篇文章是SpaRSA算法的原始文章,学习这篇文章就可以进行SpaRSA算法程序的编写了。(SpaRSA algorithm to solve convex optimization problems as an important method in the field of compressed sensing and other important applications, this article is SpaRSA algorithm original articles, learning this article can be carried SpaRSA algorithm procedures for the preparation of.)
- 2013-10-24 20:10:00下载
- 积分:1
-
stochastic-computation
TGM.m \传统的Galerkin方法
MD.m \时滞惯性流形方法
brownian.m \演示布朗运动
randomwalk.m \ 演示随机游走
tumor.m \ 演示tumor演化(TGM.m traditional Galerkin method MD.m Delays inertial manifold method brownian.m demo Brownian motion randomwalk.m demo random walk tumor.m demo tumor evolution)
- 2013-08-28 18:00:23下载
- 积分:1
-
ufric
Fric User defined in ABAQUS
- 2012-01-04 20:59:13下载
- 积分:1
-
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
-
Finite_element_tri
有限元法求解泊松方程,用matlab编写的计算程序(Finite element method for solving Poisson)
- 2008-05-22 15:52:07下载
- 积分:1
-
HGT
WRF模拟结果气象要素的检验对比,包含均方根误差,偏差和相关系数等(WRF simulation test results comparing meteorological elements, including the root mean square error, deviations and correlation coefficients)
- 2021-03-17 15:29:21下载
- 积分:1
-
WLS
用最小二乘法进行电力系统状态估计,包含IEEE30节点的电力系统图(Using least squares power system state estimation, including IEEE30 bus power system diagram)
- 2021-03-01 16:29:35下载
- 积分:1
-
shuang-tuo-qiu-re-yuan
fluent软件的UDF程序,是焊接过程的热源,热源类型为双椭球空间热源。(fluent udf heat source)
- 2020-10-13 00:07:32下载
- 积分:1
-
Tikhonov
地球物理反问题中带约束的Tikhonov正则化方法的应用(applications of constrained regularization method
)
- 2012-04-12 12:02:39下载
- 积分:1