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使用Java的swing选择图片文件，可以是jpg的也可以是二进制的raw格式文件，Java读取二进制的数据显示成图片

vc入门资料，适用于刚刚开始学习vc的同学。祝大家快速入门。-vc entry information, has just begun to study vc students. I wish you a quick start.

对于平面坐标转换的论文摘自武测毕业论文（赖增先）――我也是从网上弄来，转载时请务必保留此此信息。-Plane Coordinate Transformation for the thesis dissertation measurements taken from Wu (Lai Zengxian)- I also get from the Internet, when you reprint this information be sure to retain this.

some ftp to try it out ect ++-++-++-+--+--some ftp to try it out ect++-++-++-+--+-++--+-+-

空气湿度报警器，顾名思义，是用来测量空气中的湿度的仪器，他通过一个湿敏电容和一个频率输出电路对空气湿度进行检测，把湿度变化转变成频率输出。再通过单片机把输入的频率转化为湿度百分值并通过LCD显示出来，使人可以通过显示清楚地看到空气的相对湿度。在单片机编程时可以预先设定一个限定值，当环境湿度达到设定的湿度值时电路报警，同时发光二极管变亮，达到湿度报警的目的。-Air humidity alarm, as the name implies, is used to measure humidity in the air apparatus, he humidity through a capacitor and a frequency output circuit for detection of air humidity, the humidity changes in the frequency of the output into. Through the single-chip frequency of the input into a percentile and humidity through the LCD display, one can clearly see through the display of the relative humidity of air. Single-chip can be programmed in advance to set a limit value, when the environmental humidity to achieve set alarm circuit humidity values, while LED light changes to achieve the purpose of humidity alarm.

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PDF文件格式进行介绍，对正在进行PDF二次开发的人员有一定参考价值。(Specification of PDF File Format)

金山软件 wps2012二次开发接口帮助文档(The Kingsoft wps2012 secondary development interface to help document)

用于矩阵的一般计算，如转置 求逆 矩阵乘法 行列式 数乘(juzhen)