noise_calculation

利用相场方法，计算枝晶生长，标记为相场动力学模型B。(Dendrite growth was calculated by phase field method and marked as phase field dynamics model B.)

使用白塞尔方法进行大地主题解算，正算由大地线和大地方位角计算经纬度，反算有经纬度计算大地线长度和大地方位角(Using the white Searl method to solve the geodetic problem, we calculate the longitude and latitude by the geodesic and the earth azimuth, and calculate the geodesic length and the large local angle by calculating the longitude and latitude)

说明：  STM32F4与ADXL355通过SPI通信。(STM32F4 and ADXL355 via SPI communication.)

房屋租赁管理系统，房东可以在系统发布房屋信息，租房用户可以在系统查询房屋信息，管理员可以管理用户。 (can publish housing information system, the user can query rental housing information in the system, administrators can manage users.)

说明：  对电机进行基于spwm的变频调速系统，来实现对异步交流电动机的转速调整与三相电流调整(SPWM-based variable frequency speed regulation system for motor)

模拟双音多频(DTMF)拨号系统的MATLAB仿真,形象画出了每个数字键所代表产生的波形(Simulation of Dual Tone Multi-Frequency (DTMF) dial-up system MATLAB simulation, the image drawn by the representative of the number keys for each generated waveform)

VB.NET开发的学生成绩管理系统,具有信息录入、查询、打印等功能 (VB.NET development of student achievement management system, with information input, query, print and other functions)

等电阻圆、等电导圆、等驻波比圆的画法,有助于了解Smith圆图(The drawing of the equal resistance circle, the equal conductance circle and the standing wave ratio circle will help to understand the Smith circle diagram.)

说明：  混沌工具箱，能很好的学习和了解混沌，包括绘制吸引子、分岔图、lyapunov指数等(Chaos toolbox can learn and understand chaos well, including drawing attractors, bifurcation graphs, Lyapunov exponents, etc.)

利用分形维数原理计算分段测井曲线的盒维数，从而定量化曲线分形特征。利用雷达图对分形数据进行分析。(The fractal dimension principle is used to calculate the box dimension of segmented logging curves, and the fractal characteristics of curves are quantified.)