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第六天
Matrix-Rotate Image: 或者 You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). Follow up:Could you do thi ...
分类:其他好文   时间:2016-05-13 12:44:51    阅读次数:173
Metal 着色语言编程指南 十八
矩阵的操作符(Operators on Matrix)      加,减操作符(+, -) 适用于矩阵运算。  但是要求参与运算的矩阵行数和列数必须相等。 其运算过程就是矩阵的每个相同位置的分量执行加或者减操作,  其结果为相同大小的矩阵。   乘操作符(*) 可以适用于:     标量与矩阵    矩阵与标量    矢量与矩阵    矩阵与矢量    矩阵与矩阵     标量乘矩阵...
分类:编程语言   时间:2016-05-13 03:25:10    阅读次数:150
2016.4.2 BLAS基本知识
Level 1 Vector operations, e.g. y = /alpha x + y  向量操作 Level 2 Matrix-vector operations, e.g. y = /alpha A x + /beta y  矩阵与向量操作 Level 3 Matrix-matrix operations, e.g. C = /alpha A B + C    矩...
分类:其他好文   时间:2016-05-13 02:17:08    阅读次数:310
442 - Matrix Chain Multiplication
Matrix Chain MultiplicationSuppose you have to evaluate an expression like A*B*C*D*E where A,B,C,D and E are matrices. Since matrix multiplication is associative, the order in which multiplications are...
分类:其他好文   时间:2016-05-13 01:15:13    阅读次数:117
UVA 541 Error Correction【水题】
Error Correction Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other) Total Submission(s) : 1   Accepted Submission(s) : 1 Problem Description A boolean matrix has th...
分类:其他好文   时间:2016-05-12 22:26:33    阅读次数:153
opencl:提高kernel有效并发约束(Effective concurrency constraint)的一点心得
下面是一个简单的kernel函数,从integ_count_mat矩阵中用vload8函数取出A1,A2,A3,A4四个向量执行A4+A1-A2-A3,结果存入density_mat,代码中只用到了一个向量类型的变量sum。__kernel void object_density_filter( matrix_info_cl im_info , const __...
分类:其他好文   时间:2016-05-12 21:34:33    阅读次数:180
C++_BFS求最短路径
DescriptionAngel was caught by the MOLIGPY! He was put in prison by Moligpy. The prison is described as a N * M (N, M <= 200) matrix. There are WALLs, ROADs, and GUARDs in the prison.Angel’s friends wa...
分类:编程语言   时间:2016-05-12 20:29:27    阅读次数:287
郑轻 1478 Metric Matrice (第五届河南省赛)
1478: Metric Matrice Time Limit: 1 Sec Memory Limit: 128 MB Submit: 72 Solved: 37 SubmitStatusWeb Board Description nt j, determine if the distance matrix is "a metric" or not. A dista...
分类:其他好文   时间:2016-05-12 16:21:35    阅读次数:158
二维树状数组-POJ-2155-Matrix
Matrix Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 23707 Accepted: 8762Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the...
分类:编程语言   时间:2016-05-12 16:12:51    阅读次数:222
图像处理、机器学习概念一箩筐
Population Sparsity(种群稀疏) vs Lifetime Sparsity(存在稀疏)Fn×m=Wn×d?Xd×m F_{n\times m}=W_{n\times d}\cdot X_{d\times m}dd:表示原有的特征空间 nn:变换后的特征空间 mm:样本的数目 FF:特征矩阵(Feature Matrix) 每个样本都只用很少的激活(非零)特征来描述。具体来说,对于特...
分类:其他好文   时间:2016-05-12 12:18:57    阅读次数:478
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