usb-in-a-nutshell

STM32_F4_USB_HS微雪例程，功能强大。(Examples of stm32f4 USB HS.)

initiation a des fonctions

apple mfi spection,硬件部分附件(apple mfi spection, accessory of hardware)

The.Ultimate.Guide.to.FreeBSD 通向FreeBSD的终极向导！从安装到服务，由浅入深，看完必将成为高手！(The.Ultimate.Guide.to.FreeBSD leading FreeB SD the ultimate guide! From installation to the service, the simple, will become master reading!)

顾维刚老师详细介绍2812中断系统的使用和特点(Gu Weigang 2812 interrupted the teacher detailed the use and characteristics of the system)

linux from scratch is the manual for building linux from scratch refer www.linuxfromscratch.org for more details

一种大范围高精度的OFDM频偏估计新方法(A New OFDM Frequency estimation method)

关于联合信源信道编码的文章，来自IEEE，对于JSCC的研究很有参考价值(On the joint source-channel coding of the article, from IEEE, for the study of JSCC valuable)

GPS讲稿，是不可多得的好东西，我花了好大力气才找到的(GPS script, is the rare good things, I spent a very big effort to find the)

Digital image face detection had been developing so much in this last decade. The searching for the best method is still walking until today. This face detection research is using color model based segmentation method combined with template matching. There are 4 main process in this research. First, motion detection is used to minimize the size of the image by subtracting image n with image n+m. Then, by using YCbCr color model based segmentation, the image is separated by skin color area and non-skin color area. Third, is to reduce the noise by using the blurring way and by filtering its wide. The last one is matching the area that last with template that has been prepared to detect which area is face. The result of the research, from 217 images and 10 videos , shows that this method reach up to 70,5 face detection accuration procentage.