j*****q 发帖数: 33 | 1 iip3和im3, iip2和im2 是什么关系?怎么从图看出来?
谢谢拉 |
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b*********y 发帖数: 830 | 2 iip3 is not dirctly correlated with iip2, im2.
for im3, i think there is a 6db or sth relationship. get a RF book. they
have the derivation on it. |
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a****o 发帖数: 684 | 3 国内著名的音乐网站叉烧网论坛上有人给推荐了这个:
http://home.exound.com/forum.php?mod=viewthread&tid=11077
tascam im2,专为iphone,ipad,ipod touch录音话筒麦克风
还是立体声的。
以下文字是抄录上面链接的:
“TASCAM推出一款数字接口的IOS录音话筒---iM2. iM2是专门为iPHONE,iPAD,iPAD
TOUCH设计的话筒,可以把以上的产品变成高品质的录音话筒,音质和效果和目前
TASCAM最畅销的DR系列录音笔是一样的!!只需要把其连接APPLE设备的接口上。
一切都是如此的简单,只要你拥有iM2,就拥有了一款高品质的录音机,随心所欲
的录下一切你所需要的声音,并且长久保存!可协助你随时随地的录音,创作!
iM2自带一个话放和模拟/数字转换器,保证了音质。其内置的话筒是一个可180度调节
的电容话筒,声压级达到125dB SPL,可以捕抓低音和乐器的原声。iM2还内置了一个立
体声限制器,可调节输入电平大小。”
同时其可以通过APPLE设备的USB可以随时充电或者... 阅读全帖 |
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c***2 发帖数: 838 | 4 doing the tournament with complexity N+lgN in the cost of extra stack spaces
used for recursion
straightforward 2-pass scanning takes N-1+N-2=2N-3 with no extra space
Tournament:
void find_max_2max(int a[], int start, int end, int *max, int *max2)
{
int i, mid;
int max00,max01,max10,max11;
int temp1,temp2;
if(start==end){
*max=a[start];
*max2=a[start];
return;
}
if(end-start==1){
*max=MAX(a[start],a[end]);
*max2=MIN(a[start]... 阅读全帖 |
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f********e 发帖数: 195 | 5 【 以下文字转载自 EE 讨论区 】
发信人: freetofree (Try&Try), 信区: EE
标 题: Apple RFIC interview
发信站: BBS 未名空间站 (Tue Sep 24 17:03:34 2013, 美东)
Apple RFIC is hiring. I did not get an offer. Here are the interview
questions. Hopefully they are helpful for you.
I'm not sure apple is doing wifi or not. Currently they are using other
companies' chip. But definitely they want to do some work.Maybe for
customized low power
wireless chips
Here's are the questions:
1, How to design an LNA, how to improve linearity? how t... 阅读全帖 |
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j**u 发帖数: 6059 | 7 有一个二位矩阵,用imagesc和colormap(jet)可以显示一个彩色的图像IM1,如果选择c
olormap(gray)就生成黑白图像IM2。现在想只在一个选的区域里面(ROI)里面保留IM1
,其他的区域里面都是IM2,请问如果在matlab里面做到? |
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b*****e 发帖数: 1193 | 8 我的算法,
IM1是RGB,IM2是binary黑白(黑0白1)
,你选的区域pixel边界你都知道了,假设你的图是N*M
im1(n1:n2,m1:m2)是你选的区域,其他的变成黑白色。
1.变换(1:n1,1:m1)
for i=1:n1
for j=1:m1
if im2(i,j)==1
im(i,j,1)=255
im(i,j,2)=255
im(i,j,3)=255
else
im(i,j,1)=0
im(i,j,2)=0
im(i,j,3)=0
end
end
end
2.变换(n1:N,1:m1)
3.变换(1:n1,m1:M)
4.变换(n2:N,m2:M)
5.变换(n1:n2,m2:M)
6.变换(n2:N,m1:m2)
就是把除了你选的区域,都变为黑白。
好了,可行的话,伪币拿来 |
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j**u 发帖数: 6059 | 9 【 以下文字转载自 Computation 讨论区 】
发信人: jzxu (自然), 信区: Computation
标 题: 问个matlab问题,50伪币酬谢
发信站: BBS 未名空间站 (Fri Mar 14 22:53:28 2008), 转信
有一个二位矩阵,用imagesc和colormap(jet)可以显示一个彩色的图像IM1,如果选择c
olormap(gray)就生成黑白图像IM2。现在想只在一个选的区域里面(ROI)里面保留IM1
,其他的区域里面都是IM2,请问如果在matlab里面做到? |
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f********e 发帖数: 195 | 10 Apple RFIC is hiring. I did not get an offer. Here are the interview
questions. Hopefully they are helpful for you.
I'm not sure apple is doing wifi or not. Currently they are using other
companies' chip. But definitely they want to do some work.Maybe for
customized low power
wireless chips
Here's are the questions:
1, How to design an LNA, how to improve linearity? how to reduce NF?
A: high vov, gm3 cancellation ,feedabck etc. high ft, noise cancellation,
higher current etc.
2, MOS transistor... 阅读全帖 |
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s***e 发帖数: 911 | 11
我把程序直接给你? 很短. 这个程序很好用. 其中有些注释句很多余,是以前我调程序
干的,没删掉. 是单精度实行.反正是random number, 没必要双精度. 主程序掉用强行
转一下就成.
FUNCTION ran2(idum)
c REAL FUNCTION ran2(idum)
INTEGER idum,IM1,IM2,IMM1,IA1,IA2,IQ1,IQ2,IR1,IR2,NTAB,NDIV
REAL ran2,AM,EPS,RNMX
* REAL*8 FUNCTION ran2(idum)
c REAL FUNCTION ran2(idum)
PARAMETER (IM1=2147483563,IM2=2147483399,AM=1./IM1,IMM1=IM1-1,
*IA1=40014,IA2=40692,IQ1=53668,IQ2=52774,IR1=12211,IR2=3791,
*NTAB=32,NDIV=1+IMM1/NTAB,EPS=1.2e-7,RNMX |
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K****D 发帖数: 30533 | 14 But IM2 itself is a 续集 ah. |
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P*******e 发帖数: 39399 | 15 TS3 Alice IM2 Inception and HP7-1?
but i think the overall boxoffice will be less than that of last year |
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Y*******y 发帖数: 5293 | 20 i may see IM2 this weekend.
clash the titan.
都是无脑片,只是俩铁蛋实在太无脑了。 |
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i***r 发帖数: 1035 | 22 【 以下文字转载自 Programming 讨论区 】
发信人: iiiir (哎呀我最牛), 信区: Programming
标 题: python code performance --- normal or too slow?
发信站: BBS 未名空间站 (Tue Jan 7 11:21:52 2014, 美东)
file is 2.5GB with 18,217,166 lines
my python script took about 20-30 minutes to finish
seems slow?
Thanks!!
input file data structure (showing first two lines, wrapped):
chromo pos ref alt dc1 dc2 dc3 dtm bas din
crw itb ptw spw isw irw inw ru1 ru2
ru3 im1 ... 阅读全帖 |
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i***r 发帖数: 1035 | 23 file is 2.5GB with 18,217,166 lines
my python script took about 20-30 minutes to finish
seems slow?
Thanks!!
input file data structure (showing first two lines, wrapped):
chromo pos ref alt dc1 dc2 dc3 dtm bas din
crw itb ptw spw isw irw inw ru1 ru2
ru3 im1 im2 im3 im4 xj1 xj2 qh1 qh2
ti1 ti2 glw mxa rwa ysa ysb ysc cac jaa
jac
chr01 242806 G ... 阅读全帖 |
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p*****t 发帖数: 966 | 24 IIP_n=IM/(n-1)+Pin
IM is in dBc |
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j*****q 发帖数: 33 | 25 那这个该怎么推导出来呢?谢谢啦
从图画出来的吗? |
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