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lpc1768的PWM使用
//p2.0 pwm1.1void ALS_Init(void) //初始化{ LPC_SC->PCONP |= (1PCLKSEL0 &= ~(3PCLKSEL0 &= ~(3PINSEL4 &= ~(0X03LPINMODE4 &= ~(0X03LPINMODE_OD2 &= ~(0X01TCR...
分类:其他好文   时间:2015-03-15 02:03:12    阅读次数:256
hdu5115 Dire Wolf
Dire Wolf Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 512000/512000 K (Java/Others) Total Submission(s): 436    Accepted Submission(s): 251 Problem Description Dire wolves, als...
分类:其他好文   时间:2015-03-08 21:37:04    阅读次数:157
ALS矩阵分解推荐模型
ALS矩阵分解推荐模型 其实通过模型来预测一个user对一个item的评分,思想类似线性回归做预测,大致如下 定义一个预测模型(数学公式), 然后确定一个损失函数, 将已有数据作为训练集, 不断迭代来最小化损失函数的值, 最终确定参数,把参数套到预测模型中做预测。   矩阵分解的预测模型是: 损失函数是: 我们就是要最小化损失函数,从而求得参...
分类:其他好文   时间:2015-03-05 22:24:01    阅读次数:545
poj 1422 Air Raid 最少路径覆盖
题目链接:http://poj.org/problem?id=1422Consider a town where all the streets are one-way and each street leads from one intersection to another. It is als...
分类:其他好文   时间:2015-02-22 13:22:29    阅读次数:233
3D Modeling using GDI+
https://code.msdn.microsoft.com/3D-Modeling-using-GDI-b93937b9IntroductionMost of us use OpenGL/ DirectX based program to meet our 3d requirement. Als...
分类:其他好文   时间:2015-02-03 12:40:33    阅读次数:183
spark MLlib 概念 6:ALS(Alternating Least Squares) or (ALS-WR)
Large-scale Parallel Collaborative Filtering for the Netflix Prizehttp://www.hpl.hp.com/personal/Robert_Schreiber/papers/2008%20AAIM%20Netflix/netflix...
分类:其他好文   时间:2015-02-03 01:50:38    阅读次数:1017
Material Design系列第四篇——Using the Material Theme
Defining Shadows and Clipping ViewsThis lesson teaches you toAssign Elevation to Your ViewsCustomize View Shadows and OutlinesClip ViewsYou should als...
分类:其他好文   时间:2015-01-25 18:11:10    阅读次数:176
hdu 5115 Dire Wolf (区间DP)
Dire Wolf Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 512000/512000 K (Java/Others) Total Submission(s): 306    Accepted Submission(s): 179 Problem Description Dire wolves, als...
分类:其他好文   时间:2014-12-27 17:32:23    阅读次数:257
[ACM] HDU 5137 How Many Maos Does the Guanxi Worth(去掉一个点使得最短路最大化)
How Many Maos Does the Guanxi Worth Problem Description "Guanxi" is a very important word in Chinese. It kind of means "relationship" or "contact". Guanxi can be based on friendship, but als...
分类:其他好文   时间:2014-12-22 11:16:28    阅读次数:237
也说alsa音乐播放(mp3文件从零开始)
现有的音乐格式千差万别,于是就有了ffmpeg话说这个框架真是够牛逼,音频视频转码都不在话下,我是个死脑筋,遇到不懂的老是想弄明白,对于音乐播放感觉是一头雾水,经过几天的研究以后大致想明白了,对一个mp3文件要播放出来需要经过几个步骤: 1.转码,其实也就是提取文件中有用的音频信息 2.经过第一步得到的wav波形文件 3.调用声卡来播放wav文件,对于linux 3.0以后的内核一般为als...
分类:其他好文   时间:2014-12-21 20:46:04    阅读次数:369
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