n*****n
发帖数: 74 | 1 Dear all,
I like a software, QuoteTracker, very much. Especially the feature of tracing
real-time data quotes from Ameritrade streamer. Since I am customer of
Ameritrade, this will save my money for data feeding. So I am pretty
interested in the techniques that can log on to my account and tracing
information and send order by a nice program.
I am not a CS man, so I have no idea about Client-side application
development. I do have a Python script which can retrieve data from
finance.yahoo.com, b |
|
k**********g
发帖数: 989 | 2
run
If you have MATLAB support, try open a support request.
If you are employed (paid) by a research center, and the problem arises from
work performed for your employer. The research center may have technical
staff (苦B学生) to help troubleshoot these issues.
Otherwise, you'll have to troubleshoot the same way a programmer does.
(Steps for narrowing down the problem in the MATLAB code)
Set a breakpoint in the MATLAB program, and step through it line by line.
Repeat as many times as needed, and no... 阅读全帖 |
|
k**********g
发帖数: 989 | 3
run
If you have MATLAB support, try open a support request.
If you are employed (paid) by a research center, and the problem arises from
work performed for your employer. The research center may have technical
staff (苦B学生) to help troubleshoot these issues.
Otherwise, you'll have to troubleshoot the same way a programmer does.
(Steps for narrowing down the problem in the MATLAB code)
Set a breakpoint in the MATLAB program, and step through it line by line.
Repeat as many times as needed, and no... 阅读全帖 |
|
c*********6
发帖数: 858 | 4 Trace impedance,
Differential traces,
Layers stack up,
signal current return path,
crosstalk,
ground bounce,
Transmission line,
termination,
topology,
clock distribution,
etc. |
|
|
f*****0
发帖数: 489 | 6 in case you want to know, the red trace is the 0-3.3v input, and the green
trace is -5 - +5v output. Vp is +5v power supply and Vn is -5v power supply.
the transistors can be pretty much any small signal pnp/npn pair. I used
5401/5551. |
|
c****e
发帖数: 7 | 7 PTHs(Plated Through Holes) are commonly used to connect signal traces for
internal layers (e.g. ground layer) of a PWB (Printed Wiring Board) to its
surface components. However the geometric of PTH affects the electrical
characterization through the capacitance coupling and inductance coupling (
resonating, bouncing effects etc. come from the coupling). For high speed
digital signal transmissions, the amount of crosstalk generated from the PTH
to traces must be considered as a measure of signal |
|
c*********6
发帖数: 858 | 8 并联的话，电压低，电流大很多，所有的power trace都必须加大，在power trace上的
损耗也大啊。
串联的cell是特别选择的，它们的内阻都差不多，因此可以降低电压不平衡。
最重要的是，并联没有不安全因素吗？ |
|
w*******i
发帖数: 525 | 9 trace(X'X) = 1
这个条件基本是多余的。
因为你随便怎么扩大缩小X，objective function的值都不变。
所以1楼是正解，然后scale X，使得trace是1就好了 |
|
w****j
发帖数: 237 | 10 做的一个板子，有不少的直流电压，15V/5V/3.3V/-5V,都是几十毫安的直流，他们都要
分别的power plane吗，还是用粗一点的trace就可以了？如果用trace的话，大概多粗？
还有从internal layer引到ic上面，需要用多个小口径PTH通孔，还是用一个大口径通
孔好？ |
|
t**********1
发帖数: 26 | 11 There is an equation in this book (page 7) as shown below.
l=Tr/D
where l=electrical length of rising edge,in.
Tr=rise time,ps
D=propagation delay, ps/in.
This book also gives an example of a 10kHz ECL signal with a rising edge
of
1ns. This rising edge has a length of 5.6 inch when propagating along an
inner trace of an FR-4 PCB. The electrical length will help you understand
if you need to treat a trace as a lumped or distributed component(
transmission line) for a digital signal. |
|
a****l
发帖数: 8211 | 12 先是做出来了SCH的电路图，然后要做PCB的图，可是问题是怎么保证PCB图上的连线完
全符合SCH图上的连线网络？就是说，比如SCH图上说pinA要连接到另一个原件的pinB,
软件是否能检查PCB画好的图是否pinA的确和pinB之间有一根trace连接，而且这根
trace没有莫名其妙的和别的任何其他的东西连上？
我怎么觉得这个应该是pcb制图软件的基本功能，可是现在用的expresspcb好像不能检
查，很苦啊。难道应该换个别的什么软件？请指导一下吧！ |
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f*****0
发帖数: 489 | 13
of
before you lable it a problem, don't you need to prove that it is a problem?
there is no "pure" watre as we know it. so there is always traces of "
impurity" in our water, or whatever we run into.
so before you spend billions of dollars to treat such a "problem", you will
need to at least spend a few dollars to prove it out and convince the rest
of us that traces of stuff at ppb or lower levels are indeed problems.
maybe you can help educate the rest of the population on that front. |
|
s******a
发帖数: 220 | 14 我们实验室有以下
GC/MS FOR VOLTAILES
GC/MS FOR SEMIVOLATILES
GC/FIDGC/PID
GC/ECD
ICP/MS-DRCe for trace metals
AA for trace mercury
等等
如果您有项目，本实验愿意提供合作。谢谢各位宝贵的时间！
425-214-5868 |
|
D********g
发帖数: 533 | 15 确实很正常 不过为什么topology上面看不出这个呢？反向我也扫过 就是反方向了。
不过奇怪的是height是用的trace+retrace成图的 所以应该是看不大出来这种pattern
为啥phase上面不用trace+retrace成图呢？
all right. 其实这些问题也不是很大 这样的图拿去发表也是可以接受的 |
|
h**i
发帖数: 8 | 16 if a large scale of polymer has been dissolve in nonpolar solvent and washed
by water, the polymer would be contain small trace of water in it. Anyone
suggest a way to remove the trace of water by a simple method without
bringing any chemical change? Thanks. |
|
t*****n
发帖数: 225 | 17 you can replace limit by a Banach limit or
lim_{\omega} used in the definition of Dixmier trace.
See wikipedia for the definition of Banach limit or Dixmier trace.
unfortunately, according to wikipedia, there seems no explicit
construction of a Banach limit, although it exists if you accept
the axiom of choice.
Interesting construction. But you need to prove that F is well defined for
every S -- this does not seem to be true because the limit does not exist
for some set. |
|
n*********y
发帖数: 54 | 18 WEI ZHANG TO RECEIVE 2010 SASTRA RAMANUJAN PRIZE
http://www.math.ufl.edu/sastra-prize/2010.html
The 2010 SASTRA Ramanujan Prize will be awarded to Wei Zhang, who is now a
Benjamin Pierce Instructor at the Department of Mathematics, Harvard
University, USA. This annual prize which was established in 2005, is for
outstanding contributions by very young mathematicians to areas influenced
by the genius Srinivasa Ramanujan. The age limit for the prize has been set
at 32 because Ramanujan achieved so ... 阅读全帖 |
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m*******s
发帖数: 3142 | 19 Dirac函数对数值结果没有意义，况且Dirac函数的导数本身需要在同别的函数积分的意
义下定义，反而增加运算量。
不如不进行Chebyshev多项式展开，换成其他比如Hermite多项式，Laguerre多项式等可
以进行fourier变换的多项式，是否可行？有没有成熟的算法？
上面那个求Fourier变换的想法来自一篇paper，里面说B(\omega)的Fourier变换应该是
一系列在时间域衰减的指数函数的和。而且B(\omega)的trace对\omega作图，通常是有
峰有谷的不规则曲线，所以paper上说f_1,f_2,f_3.....都是x的Lorentzian function
。我根本不知道该怎么实现这种拟合,通常的least square方法似乎用不上。所以我才
来这儿问。
不过你的想法也不错，不进行这种整体性的分解，而是element-wise看问题，约化到通
常的函数的Fourier变换。FFT算法似乎是理想的算法，不过就是我比较担心在\omega域
对B(\omega)采样可能有问题，因为B(\omega)的trace反映出B(\omega)强烈的不光滑性
... 阅读全帖 |
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k**********g
发帖数: 33 | 20 也就是说
trace(|A-B|) >= trace(| |A|-|B| |)?
where
|A|=U^TDU, if A= U^TDU, D is diagonal matrix. Thanks. |
|
e**********n
发帖数: 359 | 21 Good only if trace is well defined, but trace may not exist for bounded
operators on an infinite dimensional
space. |
|
t*******e
发帖数: 172 | 22 That is what I understood before.
You take trace. if the matrix is positive then the trace should be big than
0. |
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l*******n
发帖数: 70 | 23 这个东西是相对的，如果你是很小的小额交易，那很难trace, 几百个账户在几百个营
业部一起运作，没法查。不过这样的话，信息很容易走漏，可操作性困难。所以一般都
是几百个账户由1-2个人在1-2个营业部进行交易，这样营业部的交易量异动就可以
trace了。比如最近的中山公用案，3各营业部一天成交2.5个亿，就比较诡异了。 |
|
j**********i
发帖数: 3758 | 24 谷歌的海低地形图可能是购买的，而不是卫星测绘的。
那张图有许多用处。经济价值比较大。
比方说：非洲的大陆架非常窄，这说明，沿海地区的地震可能性比较大。
这也解释了为什么非洲人过去在沿海地区定居人数和城市不多的原因。
对于未来的非洲开发设计，极有参考价值。
这张图应该是美国做的。但是，这张图很贵。做这张图工作量很大。
海底地形是三维的。要取得三维几何结构。不可能用采样插值办法。
也就是说传统水手的办法失灵。
现代的手段，一般是用地震方法。这是地球物理勘探方法的一个经典办法。
无论用何种方式，（超声，地震，爆炸），产生一种机械波波源（或者其他能接受
到差异的波），利用横波，纵波传播的时间差，在不同界面产生反射
（这里是水和海底岩石，沙土）通过检波器接受反射信号。把数据
送回计算机处理中心处理，就可以恢复海底三维几何结构。
这是传统的三维射线追踪法，这叫三维地震反演方法，英文叫
3D-ray-tracing，it is a seismic inversion method, and is different
from the 3d-ray-tracing of image rendering... 阅读全帖 |
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w**********y
发帖数: 1691 | 25 来抢包子...
" analyze those 5 variables all together"
请google: multivariate ANOVA..
简单的说,你这5个response variale如果是independent的,那很好办啦,就一个一个的
做ANOVA就行了(不过你要adjust significant level)..
而MANOVA就是把这5个response当作一个vector,然后去比较你这A,B,C,D的response
vector有没有significant different..而test用的方法基本都是非参的方法..
SAS里面实现MANOVA的例子:
PROC GLM DATA=RAWDATA;
CLASS GROUP;
MODEL Y1 Y2 Y3 Y4 Y5 = GROUP;
manova h=_all_ / printe printh;
然后你的output会有,Wilks' Lambda,Pillai's Trace,Hotelling-Lawley Trace等方法
的test结果..你自己选一个用就行了.
至于要不要用 |
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P****D
发帖数: 11146 | 26 ods trace on/listing;
proc logistic;
你的模型 blah blah
run;
ods trace off;
然后output窗口里面的结果里会比平时多了很多个这样子的表：
Output Added: |
|
A*******s
发帖数: 9638 | 27 中国医生有偶像吗？ 我觉得够呛，中医可以有李时珍什么的，中国的西医们不会把希
波克拉底当偶像吧？
最近因为externship的事与韩国人有一些接触，我知道中国人似乎对韩国人对中国古代
文化的说法有非议，但这个韩国医生实在让我另眼相看，他说他从小崇拜孙中山，我的
老中朋友是不信的，觉得是忽悠，但看看他给我的这个文章，他能不崇拜孙中山吗？
这个讲话时是孙中山100年前在日本的一个讲话， 难怪中国有中山医学院，但有几个人
知道孙中山的这个讲话？
Gentlemen: I highly appreciate this cordial reception with which you are
honoring me today. The topic of the day is "Pan-Asianism," but before we
touch upon the subject, we must first have a clear conception of Asia's
place in the world. Asia, in my opinion, is the cradle of t... 阅读全帖 |
|
A*******s
发帖数: 9638 | 28 中国医生有偶像吗？ 我觉得够呛，中医可以有李时珍什么的，中国的西医们不会把希
波克拉底当偶像吧？
最近因为externship的事与韩国人有一些接触，我知道中国人似乎对韩国人对中国古代
文化的说法有非议，但这个韩国医生实在让我另眼相看，他说他从小崇拜孙中山，我的
老中朋友是不信的，觉得是忽悠，但看看他给我的这个文章，他能不崇拜孙中山吗？
这个讲话时是孙中山100年前在日本的一个讲话， 难怪中国有中山医学院，但有几个人
知道孙中山的这个讲话？
Gentlemen: I highly appreciate this cordial reception with which you are
honoring me today. The topic of the day is "Pan-Asianism," but before we
touch upon the subject, we must first have a clear conception of Asia's
place in the world. Asia, in my opinion, is the cradle of t... 阅读全帖 |
|
r***6
发帖数: 401 | 29 Update: (Sorry, couldn't type chinese on this computer)
Shot a doe. Tracking. Arrow is with her. But found blood trail. Wait for
30min.
Heard big stump when she ran away. Shot was 24 yd. first blood trail on
leaves about 7yd away. I am waiting.
Waited 30min. First blood trail about 4 yd away. She ran away up to a burm.
I followed the blood trail to the forest edge. Couldn't find it anymore.
Walked out of woods and saw all grass land dotted with small shrubs. Couldn'
t see blood trail anymore. I... 阅读全帖 |
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f****o
发帖数: 4067 | 30
# begin build properties # autogenerated by buildinfo.sh ro.build.id=KOT49I.
LS740ZV6 ro.build.display.id=KOT49I.LS740ZV6 ro.build.version.incremental=
LS740ZV6.1440117223 ro.build.version.sdk=19 ro.build.version.codename=REL ro
.build.version.release=4.4.2 ro.build.date=Fri Aug 21 09:36:06 KST 2015 ro.
build.date.utc=1440117366 ro.build.type=user ro.build.user=jenkins ro.build.
host=LGEACI5R6 ro.build.tags=release-keys ro.product.model=LGLS740 ro.
product.brand=lge ro.product.name=x5_spr_us ro... 阅读全帖 |
|
z**l
发帖数: 1192 | 31 下面的分析好象有道理:
Epidemiologically, are not the factors you have raised direct evidence of
the impact of potassium/caesium and Calcium/Strontium ionic replacement?
Four points:
1. Perhaps more so than any other sea creature, K and Ca are the critical
minerals for starfish. Starfish have complex K and Ca exchange, uptake and
shedding mechanisms.
2. Sr and Cs are notorious Ca and K emulators respectively.
3. A single Sr90 or Cs137 atom resident in a starfish for a few days would
release enough energy t... 阅读全帖 |
|
b******7
发帖数: 8200 | 32 没怎么看懂，你的分析是对的，但是解bug就要trace具体log，不能用周边的去排除。
因为你假设的1，2，3也有可能最后发现是错的，或者不完整的。
again，系统崩溃是肯定有trace的，系统没崩溃硬件失效也是有硬件log的。
你也是做计算机，应该明白。
还是研究研究丰田用的哪款嵌入式行车电脑，最终是那个部分的硬件出了问题。
车版讨论的我看不懂，一会说硬件，一会说内存，一会又是app。 |
|
b******7
发帖数: 8200 | 33 没怎么看懂，你的分析是对的，但是解bug就要trace具体log，不能用周边的去排除。
因为你假设的1，2，3也有可能最后发现是错的，或者不完整的。
again，系统崩溃是肯定有trace的，系统没崩溃硬件失效也是有硬件log的。
你也是做计算机，应该明白。
还是研究研究丰田用的哪款嵌入式行车电脑，最终是那个部分的硬件出了问题。
车版讨论的我看不懂，一会说硬件，一会说内存，一会又是app。 |
|
|
|
w*******y
发帖数: 60932 | 36 George Foreman 144'' Family-Sized Grill and Hamilton Beach 5-Quart Slow
Cooker Bundle Walmart Value of the Day.
$49.00
Shipping Free with Site to Store Pickup.
Standard Shipping to PA is $1.97
Here is the link:
http://www.walmart.com/ip/George-Foreman-Grill-and-Ham-Beach-5- Description
#Item+Description" rel="nofollow" target="_blank" onclick="_gaq.push(['_
trackEvent', 'thread', 'click', '2619777 - george-foreman-144-familysized-
grill-and-hamilton-beach-5quart-slow-cooker-bundle-49.00-at-walma... 阅读全帖 |
|
|
n******n
发帖数: 12088 | 38 is there an index tracing wafer/cell prices? how do u trace them?
makers |
|
l***h
发帖数: 9308 | 39 别人打入电话，通过GV -->SG -->SS -->ATA，在ATA上显示的是SG的号码，而
不是真正打入者的CID。
google搜了一下，发现可以解决这个问题，但涉及ruby plan，不知道怎么改。
http://www.mysipswitch.com/forum/viewtopic.php?t=1799
关键就是不知道该怎么套用下面这段
name = req.Header.from.FromURI.User.to_s ## if name =~ /^$|D/
下面是我目前的dial plan
#Ruby
# Dial Plan Generated by Rubyzard v0.1
# If you need help, please post in our forum
# http://www.mysipswitch.com
# SIP tracing : true or false
sys.Trace = false
sys.Log("call from #{req.Header.From.FromURI.ToString()} to #{req.URI.U |
|
l***h
发帖数: 9308 | 40 按这个改后（见下），还是显示的sipgate的号码。
“if sys.In then”里面的then要不要去掉？
#Ruby
# Dial Plan Generated by Rubyzard v0.1
# If you need help, please post in our forum
# http://www.mysipswitch.com
# SIP tracing : true or false
sys.Trace = false
sys.Log("call from #{req.Header.From.FromURI.ToString()} to #{req.URI.User}.
")
if sys.In then
name = req.Header.From.FromName.to_s # create a copy of FromName
name = req.Header.from.FromURI.User.to_s if name =~ /^$|\D/
name = ('1' + name) if name =~ /^[2-9]\d{9,9}$/
name |
|
l***h
发帖数: 9308 | 41 那就是以下这样，明天试试
另外，name.sub!(/^011/,'')这个是单起一行，不是上一行自动换行出来的吧
#Ruby
# Dial Plan Generated by Rubyzard v0.1
# If you need help, please post in our forum
# http://www.mysipswitch.com
# SIP tracing : true or false
sys.Trace = false
sys.Log("call from #{req.Header.From.FromURI.ToString()} to #{req.URI.User}.
")
if sys.In then
name = req.Header.from.FromURI.User.to_s
name = ('1' + name) if name =~ /^[2-9]\d\d[2-9]\d{6}$/
name.sub!(/^011/,'')
req.Header.From.FromName = name
req.Header.from.FromURI.User = |
|
s*****a
发帖数: 1269 | 42 check your dialplan, I use SIPGate+GV+SIPSorcery, this one works for me:
http://www.magicjacksupport.com/step-by-step-for-gv-and-sipsoce
#Ruby
# Dial Plan Generated by Rubyzard v0.1
# If you need help, please post in our forum
# http://www.mysipswitch.com
# SIP tracing : true or false
sys.Trace = true
sys.Log("call from #{req.Header.From.FromURI.ToString()} to #{req.URI.User}.
")
if sys.In then
# Do your INCOMING call processing customisations here.
if sys.IsAvailable() then
sys.Dia... 阅读全帖 |
|
l********e
发帖数: 4863 | 43 我也不懂，我觉得临摹应该是比着画，不是印着画吧。
当然自己trace玩没啥，上课trace玩我觉得老师太不负责了。。我是不是要求太高了？ |
|
s******o
发帖数: 298 | 44 Researchers begin to trace the ancestry of massive galaxies.
by Elesa Janke
By studying quasars and their host galaxies with the Hubble Space Telescope
(HST), a team of astronomers has begun to trace the “family tree” of giant
elliptical galaxies. The group's findings reveal that 10 billion years ago,
when the universe was one third of its present age, these galaxies were
already forming, converting large amounts of gas into luminous families of
stars.
Among the most luminous objects ever found, |
|
s*****t
发帖数: 1994 | 45 11 Hour Star Trails
Credit & Copyright: Josch Hambsch
Explanation: Fix your camera to a tripod, lock the shutter open, and you can
make an image of star trails - graceful concentric arcs traced by the stars
as planet Earth rotates on its axis. Of course, the length of the star
trails will depend on the exposure time. While exposures lasting just five
minutes produce a significant arc, in about 12 hours a given star would
trace out half a circle. But in any long exposure, the background glow from |
|
t*u
发帖数: 186 | 46 摘要
单纯病毒的编写者很难找到，熊猫烧香病毒不单纯，所以作者很容易trace.
近来大家很关注这个病毒, "不愤不启, 不悱不发", 额是个教师, 罐水也以授业解惑为
己任, 木办法. 额没有研究过病毒, 具体技术也不了解, 只能讲讲原理了.
1 熊猫烧香病毒比较另类
熊猫烧香病毒感染后, 使windows界面有很大变化, 太招摇. 好的病毒/木马应该占用最
小资源, 让人找不到也感觉不到.
2 熊猫烧香病毒是一个trojan dropper
本身需要跟外界通信, 即使程序本身加壳, 难以反编译到源码看到通信远端机器地址,
它通信的时候会被网络防火墙记录远端机器地址. 有了ip地址/域名就很容易找到拥有
者了, 除非他始终在网把上网. 这个拥有者不是熊猫烧香病毒的原创者也是从原作者那
里买了源码, 否则他无法改写病毒为自己谋利. 警察有专业办法(已超出本文范围)让拥
有者帮忙找到原作者.
结论
熊猫烧香病毒功能过于繁多以至于使作者遁形不可能. 百般算计不如一颗纯洁的心. 即
使是一个聪明人也很难对抗拥有无限资源的国家机器. |
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c**i
发帖数: 6973 | 47 You are mistaken. No place on earth is immune from earthquake.
(1) In my previous posting, in (2)(a) The difference between (i) and (ii) is
that (ii) is "detailed" map.
(2) Earthquake
http://en.wikipedia.org/wiki/Earthquake
Whose section 1.2 with heading "Earthquakes away from plate boundaries"
states that "many earthquakes occur away from the plate boundary and are
related to strains developed within the broader zone of deformation caused
by major irregularities in the fault trace * * * All tec |
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c**i
发帖数: 6973 | 48 Amina Khan, The taming of pigs: DNA sheds light on farming; Today’s swine
in China are traced back 8,000 years to the same region, revealing clues
about animal husbandry and human migration. Los Angeles Times, Apr. 19, 2010.
http://www.latimes.com/news/nationworld/nation/la-sci-pigs-20100419,0,3543679.story
My comment:
(a) Summary: People in ancient China--as well as India, Southeast Asia and
Taiwan--independently domesticated pigs.
(b) I have not read the research report carefully. But
Jared Di |
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p*********w
发帖数: 23432 | 49 月光论坛事件及男猪脚小龙的一些真相zz
from GFW Blog by GFW BLOG 功夫网
来源：http://www.xjp.cc/2010/05/18/moon-bbs-trace/
月光论坛在央视黄金档节目焦点访谈投放的公关节目问世之后，引发广大网民的热烈讨
论。我这里列举该事件的一些真相，有些也许你已经知道，有些也许你不一定知道。
1. 广告中的月光论坛管理员小龙，网络ID为williamlong。作为一个男人被央视称
之为小，williamlong表示很无奈。
2. williamlong是一个标准的70后，而焦点访谈中将其清晰表述为80后，以至于大
量网友开始针对这一话题展开讨论，大量 90后及00后展开围观。
3. williamlong表示自己并不是一个军事爱好者，建立这个论坛纯属兴趣爱好。
4. 月光论坛只是一个日均访问不足30人的微型论坛，而并不是节目中描述的"军事
爱好者经常访问的网络社区"。
5. 月光博客只是一个IT技术博客，与月光论坛及军事话题毫无关系，但是节目中多
次出现月光博客的网页画面。
6. 节目中接受采访 |
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a******n
发帖数: 280 | 50 http://www2.ohchr.org/english/bodies/chr/special/sp_reportshrc_7th.htm
从以上联合国人权网站上，可找到编号A/HRC/7/3/Add.1，并在语言选项中选英文，可
打开文
件：
http://daccess-dds-
ny.un.org/doc/UNDOC/GEN/G08/106/97/PDF/G0810697.pdf?OpenElement
在第47-49页
Organ harvesting (see also A/HRC/4/33/Add.1, para. 40). A critical
issue was not addressed in the Government’s previous responses, in
particular: It is reported that there are many more organ transplants
than identifiable sources of organs, even taking into account figures
for ident... 阅读全帖 |
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