Xu Cui while(alive){learn;} – Page 63

Functional Near Infrared Spectroscopy (fNIRS): List of manufactures

Contents Company Products Artinis Brite, OxyMon, OctaMon, PortaMon, PortaLite BIOPAC fNIR 100, fNIR2000M Series CORTIVISION SPECTRUM C23 Huichuang Medical NirScan-900X, NirSmartⅡ- Pro GOWERLABS NTS fN

Xiaodan Feng
Apr 21, 2020 16 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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How to determine the voxel size in an image

Tools: SPM, cor2mni Assume the image is “a.img”, do v = spm_vol('a.img'); v.mat If v.mat is a diagonal matrix, you can simply read the number and they are the voxel size in mm. If not, a trick is to calculate the distance between adjacent

Xu Cui
Jun 17, 2010 40 sec read

MatLab surface lighting

Here are some parameters in matlab lighting. I first use patch command to plot the surface, then use camlight to shed some light on the surface.

Xu Cui
May 28, 2010 7 sec read

Copy/Paste keyboard shortcut doesn’t work under Mac

In your AIR application, if you overwrite the application menu, you might find that the keyboard shortcuts (e.g. Cmd-C, V) doesn’t work under Mac. It seems the “Edit” menu in the default application is essential to these functions.

Xu Cui
May 28, 2010 12 sec read

Brain surface plot with MatLab

This is an example of brain activation plotted on surface. In many circumstances surface view is much more straightforward than a slice view. Here is how I created such a plot using MatLab and SPM. Environment and Tools: Windows XP MatLab (v7.6) SPM

Xu Cui
May 14, 2010 1 min read

tcpip connection with pnet

We use TCP/UDP/IP Toolbox 2.0.5 to read and write data from/to a TCPIP port. It’s fast and reliable. The version we use is 2.0.5. Below is a matlab sample script showing how to connect to another computer (called ETG-4000) with TCPIP : %Connect

Xu Cui
May 8, 2010 1 min read

Noise removal in NIRS

Noise removal methods in NIRS can be divided into 4 categories: reducing noise based on its temporal characteristics: The instrument noise is usually in the high frequency band and thus can be removed by band pass filtering. Band pass filtering can a

Xu Cui
May 5, 2010 41 sec read

GMail Advanced Search

As I have quite some emails (>13000) in gmail, searching more efficiently becomes a necessity. Fortunately gmail offers some advanced search syntax. http://mail.google.com/support/bin/answer.py?hl=en&answer=7190 Search emails with attachment f

Xu Cui
May 2, 2010 19 sec read

Just became a new dad

I just became a new father. My daughter Iris was born 4 days ago. Currently sleep deprived …

Xu Cui
Apr 13, 2010 3 sec read

3D Rotation

Assume you have a vector (x,y,z) and you want to rotate it to, say x-axis, you can multiply the rotation matrix to the vector. First, make the vector a column vector and append 1 to the end. It becomes a 4×1 matrix: v = x y z 1 Then, convert the

Xu Cui
Mar 31, 2010 46 sec read

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