Sigma Lambda Phi Confraternity

The Lorenz attractor, named for Edward N. Lorenz, is an example of a non-linear dynamic system corresponding to the long-term behavior of the Lorenz oscillator.The Lorenz oscillator is a 3-dimensional dynamical system that exhibits chaotic flow, noted for its lemniscate shape. The map shows how...

Program FFTSIGMA plots Fourier series representations with sigma approximation. The figures show effects of the number of series terms and use of Lanczos sigma factors to smooth Gibbs oscillations. The Fourier series of a periodic function with period px has the approximate form: f(x) = sum(...

Medical Doctor's HIPAA compliant email, manage PHI and voice transcription. Collaborate with Instant Messaging, File Sharing and Private Message Boards. Send and Receive secure email, share documents and patient information. HIPAA and GLBA compliant. Works across networks and firewalls without a...


Platforms: Unix, Linux

Medical Doctor's HIPAA compliant email, manage PHI and voice transcription. Collaborate with Instant Messaging, File Sharing and Private Message Boards. Send and Receive secure email, share documents and patient information. HIPAA and GLBA compliant. Works across networks and firewalls without a...


Platforms: Windows

Medical Doctor's HIPAA compliant email, manage PHI and voice transcription. Collaborate with Instant Messaging, File Sharing and Private Message Boards. Send and Receive secure email, share documents and patient information. HIPAA and GLBA compliant. Works across networks and firewalls without a...


Platforms: Mac

Medical Doctor's HIPAA compliant email, manage PHI and voice transcription. Collaborate with Instant Messaging, File Sharing and Private Message Boards. Send and Receive secure email, share documents and patient information. HIPAA and GLBA compliant. MDemail.net will work across networks and...


Platforms: Windows

Lyapunov exponent calcullation for ODE-system. The alogrithm employed in this m-file for determining Lyapunov exponents was proposed in A. Wolf, J. B. Swift, H. L. Swinney, and J. A. Vastano, "Determining Lyapunov Exponents from a Time Series," Physica D, Vol. 16, pp. 285-317, 1985.For...


Platforms: Matlab

[VINDX FRACDIM V_SIGMA COVERSIZE] = varIndx(LOW,HIGH) LOW is a column vector of the lowest price in the bar (second, minute, etc). HIGH is a column vector of the highest price in the bar. VINDX is the variation index of the data. FRACDIM is the fractal dimension of the data. V_SIGMA is the...


Platforms: Matlab

This code calculates the Exponentially Weighted Moving Average Standard Deviation Exponentially weighted moving average (EWMA) standard deviation applies different weights to different returns. More recent returns have greater weight on the variance. The exponentially weighted moving average...


Platforms: Matlab

Sigma Forex is leading European professional online trading Brokers registered in the Uk and most of the EU countries. It was founded by professional private investors including (banks, traders, brokers, and software developers), which enabled Sigma to identify the essential needs of the Forex...


Platforms: Windows

Medical Doctor's HIPAA compliant email, manage PHI and voice transcription. Collaborate with Instant Messaging, File Sharing and Private Message Boards. Send and Receive secure email, share documents and patient information. HIPAA and GLBA compliant. Works across networks and firewalls without a...


Platforms: Mac

An interpreter of lambda calculus.It shows reduction process of lambda terms.Several evaluation strategies are supported.Output format can be selected from LaTex, plain text.


Platforms: Windows, Mac, Solaris, Linux

This toolbox allow the simulation of sigma-delta modulators. considering the most important building block non-idealities. Moreover, it provides functions for evaluating the sigma-delta modulator performance.


Platforms: Matlab

Auto Gaussian & Gabor Surface fit---Functions to fit a 1D Gaussian to a curve and a 2D Gaussian or Gabor to a surface. The routines are automatic in the sense that they do not require the specification of starting guesses for the model parameters. This is done by evaluating the quality of fit for...


Platforms: Matlab

GAUSSian REALIZation of a random variable with standard deviation sigma and correlation length lambda


Platforms: Matlab

Matlab codes are provided for min-max optimization for loop-filter design in delta-sigma modulators.The MATLAB codes are based on our recent paper:M. Nagahara and Y. Yamamoto,Frequency-Domain Min-Max Optimization of Noise-Shaping Delta-Sigma Modulators,to appear in IEEE Trans. SP, 2012.A draft...


Platforms: Matlab

With this function, you can get the value of L (wavelength), k (wave number), sigma(angular frequency), using different solutions of the dispersion relationship.Inputs: h = deep water (m) T = wave period (s)Outputs: kr = wave number with Newton-Rhapson (1/m) Lr = wavelength with Newton-Rhapson...


Platforms: Matlab

This file provides implementations of the composite parameterization of the unitary group U(d) and special unitary group SU(d) of arbitrary dimension d.>> UC.mFor an arbitrary dxd real matrix 'lambda' the function UC(lambda) returns a unitary matrix of dimension dxd.>> UCS.mFor an arbitrary dxd...


Platforms: Matlab

[G GWINLEN] = genGaborKernelF( MU,NU,sigma,scaleXY,imgSz )GIMG = GABORCONV(IMG,G,GWINLEN)Extract the texture feature using Gabor filter/wavelet. You should first generate cell array G, which is a set of kernels in freq domain, then pass G and the image to the function GABORCONV.


Platforms: Matlab

The algorithm takes in a 1-D signal and finds the Gaussian derivative of it with the given kernel size and sigma, to provide the zero crossings. The zero crossings are then analyzed to give peaks and valleys. In order to remove very closely situated peaks and valleys, a width (provided by the...


Platforms: Matlab