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于 2022-01-22 发布文件大小:7.68 kB

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1背包问题是NP难题。0
0-l背包问题是子集选取问题。一般情况下，0-1背包问题是NP难题。0-1背包问题的解空间可用子集树表示。解0-1背包问题的回溯法与装载问题的回溯法十分类似。在搜索解空间树时，只要其左儿子结点是一个可行结点，搜索就进入其左子树。当右子树有可能包含最优解时才进入右子树搜索。否则将右子树剪去。设r是当前剩余物品价值总和；cp是当前价值；bestp是当前最优价值。当cp+r≤bestp时，可剪去右子树。计算右子树中解的上界的更好方法是将剩余物品依其单位重量价值排序，然后依次装入物品，直至装不下时，再装入该物品的一部分而装满背包。由此得到的价值是右子树中解的上界。-0-l knapsack problem is selected subset of the problem. Under normal circumstances, 0-1 knapsack problem is NP-hard. 0-1 knapsack problem the solution space available subset of the tree said. Xie 0-1 knapsack problem with the law retroactively loading the retroactive law very similar. The search solution space trees, as long as their son left node is a viable nodes, the search entered its left subtree. When the right subtree is the optimal solution may contain only son into the right tree search. It will cut right subtrees. Suppose that r is the total value of the remaining items; Cp is the current value; Bestp is currently the best value. When cp r bestp, they can cut right subtrees. Calculation right

2022-03-25 00:00:51下载

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这本书给了IDL编程技术的基础上，综合考虑…
本书全面介绍了IDL的基础只是和应用编程技巧。初级者可以掌握IDL的基础语法，中高级读者可以学会如何编写易于理解而又高校的IDL程序。-This book gave a comprehensive account of the basis of IDL programming techniques and applications only. Primary will be able to grasp the basis of IDL grammar, middle and senior readers can learn how to prepare easy-to-understand IDL procedures and institutions of higher learning.

2022-08-24 15:08:13下载

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When application is deployed, the exception unable to find database dll occurs w...
When application is deployed, the exception unable to find database dll occurs when generating reports. This is because you are not using Crystal Report 8.5 ActiveX Designer RunTime Library (craxdrt.dll) Check out this tutorial provides best practice solution.

2022-04-12 13:25:51下载

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用API改变ListView外观
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2022-08-16 12:34:23下载

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有线电视双向推荐
用户的双向推荐功能，没有使用框架，纯手工打造，有助于了解对数据的操作

2023-02-25 03:30:04下载

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微积分的数值计算函数，包括： double composite_simpson(double(*f)(double),double a,double b,int...
微积分的数值计算函数，包括： double composite_simpson(double(*f)(double),double a,double b,int n) double romberg(double(*f)(double),double a,double b,double eps,int max_it) double gauss_legendre(double(*f)(double),double a,double b) double central_difference(double(*f)(double),double a, double h,double eps, int max_it) double runge_kuta(double(*f)(double,double),double x[],double y[],double h,int n) double proved_euler(double(*f)(double,double),double x[],double y[],double h,int n) double adams(double(*f)(double,double),double x[], double y[],double h,int n) double montecar(double(*f)(double),double a,double b,double ub,double eps,int k,int n) float uniform_random()-calculus numerical calculation functions, including : double composite_simpson (double (* f) (double), a double, double b, int n) double Romberg (double (* f) (double), a double, double b, double eps, int max_it) double gauss_legendre (double (* f) (double), a double, double b) double central_difference (double (* f) (double), a d

2022-10-24 10:40:02下载

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互刷源码
互刷的平台源码，不错的。现分享出来大家，大家互相研究下。

2022-06-18 09:49:12下载

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游戏编程参考手册的CHM版，是学习游戏编程的好书。
游戏编程参考手册的CHM版，是学习游戏编程的好书。-Game programming reference manual version of the CHM is to study game programming books.

2022-08-09 19:22:41下载

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The list can be a customized list of attributes for each box, to support text ed...
可以对列表中每一项定制属性的列表框，支持文字编辑/图形选择/颜色选择/列表选择-The list can be a customized list of attributes for each box, to support text editing/graphic select/color selection/list to select

2022-02-21 01:09:43下载

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堆栈和队列
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2022-03-29 00:10:32下载

积分：1

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