el-centro地震波

用C++实现LL(1)文法分析 用C++实现LL(1)文法分析-C achieve LL (1) grammar analysis C achieve LL (1) grammar analysis

说明：  虽然 AdaBoost 算法的检测速度快，误识率低，但是在样本的权重更新过程中，对于分类错误样本中的正、负样本没有加以区分，不利于提高正样本的识别率。本文提出一种新的权重更新方法，对于分类错误的样本，对判断错误的正样本给更高的权重，使得算法在下一轮迭代时，更加关注对分类错误的正样本的学习，从而提高对正样本（人眼）的检测率。采用基于最小二乘法对眼部的外轮廓进行椭圆拟合，根据拟合椭圆的参数来判断眼睛的睁闭状态；采用结合 PERCLOS 和眨眼频率的方法，对疲劳状态进行检测。(Although AdaBoost algorithm has fast detection speed and low false recognition rate, in the process of sample weight updating, there is no distinction between positive and negative samples in classification error samples, which is not conducive to improving the recognition rate of positive samples. In this paper, a new weight updating method is proposed, which gives higher weight to the positive samples of classification errors, so that the algorithm pays more attention to the learning of the positive samples of classification errors in the next iteration, so as to improve the detection rate of the positive samples (human eyes). Based on the least square method, the eye contour is fitted with ellipse, and the opening and closing state of eyes is judged according to the parameters of fitting ellipse; the fatigue state is detected by combining PERCLOS and blinking frequency..)

cascaded 12 level converter(cascaded 12 level converter dv)

说明：  Beckhoof ADS通信 C#语言测试程序(Beckhoof ads communication C language test program)

07年全国电子设计大赛论文，有音频信号分析仪，无线识别等-xiazisheji

huffmantr

Problem Description 对于输入的每个字符串，查找其中的最大字母，在该字母后面插入字符串“(max)”。 Input 输入数据包括多个测试实例，每个实例由一行长度不超过100的字符串组成，字符串仅由大小写字母构成。 Output 对于每个测试实例输出一行字符串，输出的结果是插入字符串“(max)”后的结果，如果存在多个最大的字母，就在每一个最大字母后面都插入"(max)"。

stm32通过ch376读取鼠标坐标,用鼠标来测量距离(STM32 reads the mouse coordinates by CH376, and uses the mouse to measure the distance)

adxl345 accelerator device

Where We ve Been Where We re Going Back in February (that s 1998, but it almost seems longer), Dr. GUI set off to start a set of columns on the Active Template Library (ATL).