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Functional Near Infrared Spectroscopy (fNIRS): List of manufactures

Contents Company Products Artinis Brite, OxyMon, OctaMon, PortaMon, PortaLite BIOPAC fNIR 100, fNIR2000M Series CORTIVISION PHOTONCAP Huichuang Medical NirScan-900X, NirSmartⅡ- Pro GOWERLABS NTS fNIRS

Xiaodan Feng
Apr 21, 2020 15 min read

What does a wavelet coherence plot tell you?

Can you find any pattern in the two signals, green and blue? The blue signal is the brain wave (measured by NIRS) of a person when he is pressing some buttons (the timing of button pressing is shown i

Xu Cui
Aug 27, 2012 1 min read

Wavelet Coherence

Wavelet transform coherence (WTC) is a method for analyzing the coherence and phase lag between two time series as a function of both time and frequency (Chang and Glover 2010). Here I played with it

Xu Cui
Aug 31, 2010 1 min read

SVM regression with libsvm

SVM is mostly commonly used for binary classifications. But one branch of SVM, SVM regression or SVR, is able to fit a continuous function to data. This is particularly useful when the predicted varia

Xu Cui
May 20, 2010 1 min read

浅谈近红外脑成像英文期刊文章撰写

本文作者是刘宁博士作者简介：刘宁，塔夫斯大学生物医学工程博士（Tufts University），斯坦福大学脑科学方向科研人员。 Frontiers 杂志客座编辑（Guest Associate Editor for Fronti

Xu Cui
Jun 23, 2022 11 sec read

nirs2img, create an image file from NIRS data

Update 2021/2/27: If you find griddata3 not working, try to change griddata3 to griddata. I was asked where to get nirs2img script. Here it is. The download link is at the bottom of this article. nirs2img is to create an image file from the input data. Then theimage file can be viewed by a

Xu Cui
Oct 2, 2019 51 sec read

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Increase your virtual machine disk size in VMWare

Host OS: Mac Virtual machine: Windows XP Problem: You initially set the hard disk size to 20G. Later you find you need to increase the disk size to 100G. Solution: turn off your virtual machine and set the hard disk size to 100G. You don’t need

Xu Cui
Oct 15, 2009 22 sec read

SVM (support vector machine) with libsvm

I am learning svm lately and tried libsvm. It’s a good package. Linear kernel example (support vectors are in circles): Nonlinear example (radial basis) 3-class example Basic procedure to use libsvm: Preprocess your data. This including normali

Xu Cui
Oct 7, 2009 1 min read

Why should you be nice to young people

Xu Cui
Sep 24, 2009 0 sec read

The marshmallow test, temptation

Xu Cui
Sep 22, 2009 0 sec read

Sensitivity, specificity, ROC, AUC …

You can’t believe how much jargon there is in binary classification. Just remember the following diagram (from wiki). accuracy = ( TP + TN ) / (P+N), i.e. correctly classified divided by the total false discovery rate (FDR) = TP / (TP+FP), i.e.

Xu Cui
Sep 17, 2009 1 min read

Unable to build a valid certificate chain for the…

How to get a cert in the first place: http://www.adobe.com/devnet/air/articles/signing_air_applications_print.html If you encounter this error when signing your AIR application, do the following: Download the Thawte Code Signing CA from www.thawte.co

Xu Cui
Sep 3, 2009 39 sec read

Terrific AIR applications

You can get all applications from Adobe Marketplace Beautiful Design Employee Directory Elegant design. This application drives me to learn AIR. Adobe Media Player Elegant design Time 100 Desktop Nice design. Rotating globe, rotating pictures in 3D T

Xu Cui
Aug 28, 2009 25 sec read

Balloon model of hemodynamics

Picture: The vascular bed is treated as an expandable venous compartment (a balloon). If there is a burst of flow, the volume will increase and then return to baseline. That’s where ‘balloon’ comes from. During steady state (i.e. wi

Xu Cui
Aug 20, 2009 1 min read

Use htaccess to protect your web folder

Use htpasswd to create password file, or add password htpasswd -c .htpasswd fred htpasswd .htpasswd linda Then create a .htaccess file with the following text (not the path to the password file has to be full path) AuthUserFile /full/path/to/.htpassw

Xu Cui
Aug 16, 2009 18 sec read

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