fdp5final

The number π is a mathematical constant that is the ratio of a circle s circumference to its diameter and is approximately equal to 3.14159. It has been represented by the Greek letter "π" since the mid-18th century, though it is also sometimes romanized as "pi

a matlab file to develop models for underwater acoustic communication networks

灰度变16进制包含了多种功能是各种代码中必要的一步(Grayscale variable hexadecimal system contains many functions, which is a necessary step in various codes.)

m-fsk modulation and de modulation

These files are made on MATLAB in which we have got embedded target for C in DSP.

现代谱估计的程序，对给定的随机信号利用yule-walker方程进行谱估计与其理想功率谱进行谱估计的对比，并比较参数。(Modern spectral estimation procedures, given the use of yule-walker random signal spectrum estimation equation from its ideal power spectrum spectrum estimation contrast and compare the parameters.)

determination of R-R interval of each ECG wave of six limb leads (Leads I, II, III, AVR, AVL and AVF) by using square derivative curve technique. Baseline or isoelectric level of every ECG signal is also determined for accurate computation of net QRS deflection (NQD) at all the six above-mentioned leads.

it includes some usefull codes in speech processing

数字信号处理、脉冲响应不变变换法设计巴特沃斯滤波器(Digital signal processing, the impulse response invariant transform design Butterworth filter)

用NRTL模型，求解萘在一种离子液体中的活度系数。 求解非线性方程、非线性拟合都可以实现。 稍微对比了一下，发现还是拟合的结果好些。 Matlab源程序及结果在附件里(with NRTL model for naphthalene in an ionic liquid in the activity coefficient. Solve nonlinear equations, nonlinear fitting can be achieved. Contrast slightly for a moment and found that the fitting or better results. Matlab source and the results of the annex)