urgent requests by the original code

详细讲解备份数据库源码。-detailed database on the backup source.

此程序为图形模式的源程序，其具有较高的精度，供大家参考。-This process the source code for the graphics mode, which is of high precision, for your reference.

ieee reference paper

此程序适合于,和jm12864m-2或者是rt12864-3m类似接口的lcd液晶屏-Suitable for this procedure, and jm12864m-2 or similar rt12864-3m LCD screen lcd interface

对计算机专业学生的忠告-students on the computer professional advice

基于存在概率图的圆检测方法.提出了一种基于存在概率图的圆检测方法, 将图像边缘点共圆结构信息变换为圆存在概率图中的峰, 再通过峰值检测确定圆的参数。该方法能有效地检出边缘不清晰、不完整的圆形轮廓, 具有占用内存少, 阈值物理意义明确的特 点, 较好地解决了标准 HT 圆检测方法中占用内存空间大, 计算效率低的问题。实验结果表明圆存在概率图具有较强的稳定性和分辨能力.-Probability map based on the existence of circle detection method. Presents a probability map based on the existence of circle detection method to image edge points, a total of circular structure of the existence of information is transformed into a round map of the peak probability, and then through the peak detector to determine the parameters of a round. This method is effective in detecting the edge of unclear, incomplete circular profile, with less memory, the physical meaning of the threshold specific characteristics, a better solution to the standard circle detection method HT memory space, the computational efficiency of low- problems. The experimental results show that the existence of the probability circle map has strong stability and resolving power.

本ppt介绍了多层C/S型数据库应用，多层数据库应用的结构，典型的三层C/S结构，B/S型数据库应用，典型的B/S结构（三层），结合三层C/S的B/S结构（四层），使用多层分布式应用结构的优势，高可靠性的多层分布式结构等方面的内容-ppt of the multi-storey C/S database application, the multilayer structure of the database application, the typical three-tier C/S, B/S database application, a typical B/S (three), the combination of the three-tier C/S B/S structure (four), the use of multi-storey structure of the distributed application advantages, high reliability distributed multi-storey structure of the content

传输线理论与阻抗匹配，很好的文章，值得一看。-transmission line impedance matching with the theory, a good paper, an eye-catcher.

虚拟专用网的创建与实现-Virtual Private Network creation and implementation

清华计算机组成原理电子教案:校验码-Tsinghua Computer electronic templates Principle : Check Code