WPF3D加载Obj文件加载

说明：  在以上基础上的又一创新，最最完整的WAV音频播放软件(above another on the basis of innovation and the most complete WAV audio software)

滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。(Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for)

内含使用keil软件做汉字显示实验的全部代码和工程。(Containing Chinese characters using keil software to do all the code and engineering experiments.)

Mathworks公司在Matlab6.5中推出了将Matlab中的.m函数编译为COM组件的工具COM Builder，使用这个工具可以方便的制作出想要的COM组件，以供其它支持COM的编程语言调用，实现Matlab和其他编程语言的整合。(The Mathworks launched in Matlab6.5 m function compiled in Matlab COM component tools COM Builder, use this tool can easily produce desired COM components for other programming language that supports COM call to achieve the integration of Matlab and other programming languages.)

二维图形的变换，平移，翻转，尺度变换，反射对称，用MFC实现，这是别人的实现，我又给添加了既平移又反转的情况演示(two dimension graphic convert, translate ,rotation,scaling ,reflection symmetric, used by MFC implemented ,though other implement ,but i add the translate and rotation )

FDTD_3D程序实现了两端口微带线的的模拟-FDTD_3D program achieved a two-port microstrip lines simulation

贪吃蛇经典小游戏，有效的帮助初学者进行开发学习，起到借鉴的作用！！！(Snake classic game, effective to help beginners to develop learning, play a reference role)

主要是对矩形图片进行倾斜校正，通过上、下、左、右四个点求倾斜角，进行旋转后，判断是否校正，如果没有校正，在次求倾斜角

STM32驱动MS5611读取温度气压值，并在LCD屏显示。(STM32 drive MS5611 to read temperature, air pressure, and display in the LCD screen.)

以前上传过matlab版本的类似程序，此为c版本的导纳矩阵形成程序，在潮流计算和仿真中应用广泛。(Some programs of matlab version had been uploaded before,this is a C-version program to lead admittance matrixes,which are widely used in tideway computation and simulation.)