Compiling mex on MAC OS X

I have tried to compile mex for my matlab program, but it alway shows the error message like 'can't find std...'

Matlab version : R2011b
OS : OS X Lion 10.7

To solve this you have to install Xcode first, it can be downloaded form mac app store (free).
Second, edit the mexopt.sh,then find SDKROOT
 vi ~/.matlab/R2011b/mexopt.sh
set SDKROOT to

SDKROOT='/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk'

according to your OS version

Ref: http://stackoverflow.com/questions/9845762/matlab-mex-cant-find-standard-library-with-xcode-4-3-mac

無力阿

最近工作上實在有點使不上力，感覺之前老闆要我作的說穿了只是為了要應該是把多了解LTE Physical layer 的處理 但是又要我交給他模擬，真是把我給弄糊塗了 眼下最重要的是把下行給弄的在清處些，尤其是feedback 還有HARQ 要是這些東西有人可以一起討論該有多好 替自己加油吧;-)

BatMan Equation

It's a interesting equation. Here is the matlab code for batman logo.

% Grey axes

axes('Xlim'  ,[-7 7]    , 'Xtick' ,-7:7,...
     'Ylim'  ,[-5 5]    , 'Ytick' ,-5:5,...
     'YtickL',''        , 'XtickL',''  ,...
     'Ygrid' ,'on'      , 'Xgrid' ,'on',...
     'Xcolor',[.8 .8 .8], 'Ycolor',[.8 .8 .8]);
hold on

% Outer wings

f1 = '(x/7)^2 * sqrt(abs(abs(x)-3)/(abs(x)-3)) + (y/3)^2 * sqrt(abs(y + 3/7*sqrt(33))/(y + 3/7*sqrt(33))) - 1';
ezplot(f1,[-8 8 -3*sqrt(33)/7 6-4*sqrt(33)/7]);

% Bottom

f2 = 'abs(x/2)-(3*sqrt(33)-7) * x^2/112 - 3 + sqrt(1-(abs(abs(x)-2)-1)^2) - y';
ezplot(f2,[-4 4]);

% Outer ears

f3 = '9 * sqrt(abs((1-abs(x))*(abs(x)-0.75)) / ((1-abs(x))*(abs(x)-0.75))) - 8*abs(x) - y';
ezplot(f3,[-1    -0.75 -5 5]);
ezplot(f3,[ 0.75  1    -5 5]);

% Inner ears

f4 = '3*abs(x) + 0.75*sqrt(abs((0.75-abs(x))*(abs(x)-.5)) / ((.75-abs(x))*(abs(x)-.5))) - y';
ezplot(f4,[-0.75 0.75 2.25 5]);

% Connect inner ears (flat line)

f5 = '2.25*sqrt(abs(((0.5-x)*(0.5+x))/((0.5-x)*(0.5+x)))) - y';
ezplot(f5,[-0.5 0.5 -5 5]);

% Inner wings

f6 = '6*sqrt(10)/7 + (1.5-0.5*abs(x)) * sqrt(abs(abs(x)-1) / (abs(x)-1)) - 6*sqrt(10)/14 * sqrt(4-(abs(x)-1)^2) - y';
ezplot(f6,[-3 -1 -5 5]);
ezplot(f6,[ 1  3 -5 5]);

% Change line color and width

set(get(gca,'children'),'Color','b','Linew',2)

% Title and labels

title('Batman'); xlabel(''); ylabel('')

% Superimpose black axes with xy-ticklabels

xlbl(1:15,1:2) = ' '; xlbl([1,8,15],:) = ['-7';' 0';' 7'];
ylbl(1:11,1:2) = ' '; ylbl([1,6,11],:) = ['-5';' 0';' 5'];

axes('Xlim'  ,[-7 7], 'Xtick' ,-7:7,...
     'Ylim'  ,[-5 5], 'Ytick' ,-5:5,...
     'YtickL',ylbl  , 'XtickL',xlbl,...
     'Box'   ,'on'  , 'Color' ,'none');

ref:

http://math.stackexchange.com/questions/54506/is-this-batman-equation-for-real

Ubuntu panel problem

Problem: I can't find the network manager on top panel
Solution:
sudo gedit /etc/NetworkManager/nm-system-settings.conf
# This file is installed into /etc/NetworkManager, and is loaded by 
# NetworkManager by default.  To override, specify: '--config file' 
# during NM startup.  This can be done by appending to DAEMON_OPTS in 
# the file:
#
# /etc/default/NetworkManager
#

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true
Solution2:

1.gconftool --recursive-unset /apps/panel

2.rm -rf ~/.gconf/apps/panel

3.pkill gnome-panel 

ref:http://blog.csdn.net/wyzxk888/article/details/5934157

ubuntu firefox is already running but is not responding

solution
-open terminal
-killall firefox
- restart your browser

Ubuntu network mangager can't save

 Today I found some problem when I setting static IP for ubuntu 11.04.
I using network manager GUI interface ,and set eth0 manual. After setting up the IP addrerss, i cant't press save button . And the step below can solve the proble.

Here's what I do :
1. Right click on NM applet and choose "Edit Connections"
2. Click "Add" to create a new wired connection.
3. Give it a name, like "Static 192.168.1.150"
4. Click on IPv4 settings
5. Click Method and change to "Manual".
6. Click "Add"
7. Double click on Address bit - enter address, remember to hit return.
8. Do the same for netmask - remember that return button at the end.
9. Do the Gateway, and yep - hit return to save everything.
10. Optionally configure DNS and search domains. I usually stick DNS as the gateway address.
11. Hit Apply and close the dialog.
12. Finally, left click on NM applet and choose your "Static 192.168.1.150" entry.
ref:http://ubuntuforums.org/showthread.php?t=1278133&page=2

win7 預覽窗格失效解決辦法(轉)

是登錄檔previer handler的問題
參考以下連結:
http://xzjiang.blogspot.com/2009/09/pdf-for-windows-7-x64.html