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P115 IC卡手持POS是天石科技32位IC卡POS系列产品之一，该产品秉承天石科技的一贯品质，产品结构紧凑，功能实用，操作简单，并具低功耗特性，是人机工学和现代科技的完美结合。它拥有多项专有技术，能够保证产品性能更加稳定强劲。整机采用工业级设计，其环境适应能力较强。P115兼容卡种全面，并且提供方便实用的开发平台和应用程序接口，易于自主应用二次开发，适用于需要随时随地处理IC卡的交警、烟草、公用事业、餐饮等多个行业。 天石p115开发手册 ，pdf格式-P115 IC card handheld POS technology is Tianshi 32 IC card POS products, one of our days, the product has always been the quality of stone technology, products, compact structure, functional and practical, simple operation, and a low-power characteristics, is a mechanic school and the perfect combination of modern technology. It has a number of proprietary technology, to ensure a more stable product performance strong. Machine used industrial design, ability to adapt to their environment. P115-compatible card types comprehensive, and provide convenient and practical development platform and application program interface, easy self-application of the second development, applicable to the needs of any traffic police deal with IC cards, tobacco, utilities, foo

Euler公式与改进Euler比较。-Euler formula and improve Euler comparison.

LDPC码H矩阵构造的三种尝试，包括比特填充法、PEG法和近似最短环路法（ACE）的实践(This document includes three methods to implement LDPC H matrix construction. Please enjoy them!)

说明：  简单EEMD算法实现对信号的分解，附加说明文件。(Simple EEMD algorithm decomposes a segment signal with a description file.)

安卓手机端蓝牙互传软件 可用 学习用(the android bluetooth code good)

常用PCB元件封装库4，为一般开发提供方便-PCB components commonly used package database 4, to provide convenience for the general development

六位LED显示器实时显示时分秒。计时通道8053实现(Six LED displays are displayed in real time minutes. Time-lapse channel 8053 realization)

VB制作带ICO图标的菜单实例，使软件窗口上的菜单更专业、更美观。实现思路：隐藏各Picture Box控件，使各Picture Box控件能够根据图片自动改变大小，得到窗口中菜单的句柄，得到第一个子菜单File的句柄，得到File菜单中的第一个菜单项的ID，然后为其添加图标，也可以添加两个图片，一个表示菜单项被选中状态，另一个表示菜单项没有被选中，得到File菜单中各个菜单项的ID并为其添加图标，

说明：  使用simulink实现变压器的仿真生成的C代码(C code generated by transformer simulation using Simulink)

用matlab程序求解最接近M的多项式函数(Solve the polynomial function closest to M using Matlab)