repair

Pascal基础教程，讲述Pascal的基本操作，为程序设计初学者提供(Pascal Foundamental tutorial)

根据比幅测向发，可以实现不同波束的测向功能。可以减少运算量，提高运算速度。(According to the direction of hair than, can realize the function different direction of the beam. Can reduce the amount of computation, improve operation speed.)

超声波声场模拟，可自行设定频率、发射波形、带宽等等，设定换能器矩阵(Ultrasonic sound field simulation, can set the frequency of the transmitted waveform, bandwidth, etc., setting the transducer array)

21种特殊函数的数值计算的matlab代码，包括bessel函数，gamma函数，beta函数等(21 kinds of special functions matlab numerical code, including bessel function, gamma function, beta function, etc.)

简单函数的傅里叶变换，包括sinc、高斯函数和带有二次相位的高斯函数的傅里叶变换(Fourier transform of simple function)

说明：  这是一个国外的DST的Matlab工具箱，很全面的反映了dempster-shafer理论，是学习DST的权威工具箱(This is a foreign DST toolbox of Matlab, it is a comprehensive reflection of dempster-shafer theory, is to learn from the authority of DST Toolbox)

A matlab code for ideal air properties

说明：  扩展卡尔曼滤波算法锂离子电池SOC估计中有较广泛的应用，其精度高，鲁棒性好，算法简单(The extended Kalman filtering algorithm has a wide range of applications in SOC estimation of lithium-ion batteries, with high accuracy, good robustness, and simple algorithm)

通过最速下降算法研究基于梯度的自适应方法，最速下降是递归的，滤波器计算是一步步迭代进行(through the steepest descent gradient algorithm based on the adaptive method, the steepest decline is recursive, Filter is an iterative step by step)

实现ITU-R P.676中的天顶方向的大气衰减(the function to calculate the gas attenuation in ITU-R P.676)