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P**A
发帖数: 2 | 3 Tools-->Internet Option --> Content 内容-->
自动完成 --》 清除表单，清除密码 |
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j*******8
发帖数: 933 | 4 Thank you for your reply!
But we can't use 1% triton. because the PSD fraction is not sollulable in 1%
triton.
anyway, it's good to know that 1% SDS is not goog for IP. thank you! |
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c**a
发帖数: 94 | 5 dendritic spines retract or collapse之后,它的PSD structure咂整了啊, 落回
dendrite上之后是解散
了吗, 要是没有解散, 那spine还可能从同一个地方再重新长起来吗.
能给篇reference吗,谢谢 |
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d******u
发帖数: 178 | 6 选择－粘贴到illustrator里面，这个时候是矢量图形，没有分辨率限制。然后可以在
illustrator里输出为各种格式，包括photoshop的psd。还有Tiff和EMF可以选，都不错
。 |
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m*****l
发帖数: 28 | 7 Publication 惨不忍睹， Pubmed: Gray NW
3篇first－author文章。2005年的文章Figure 5还是错的，2003年的文章Figure 3 ps
的不行。
不是这个领域的，看不出来造假没有。
谁要是找出来我给谁发包子。
奇怪了，这样的人怎么能当上Nature的editor去把握这个领域的最前沿。
A dynamin-3 spliced variant modulates the actin/cortactin-dependent
morphogenesis of dendritic spines.
Gray NW, Kruchten AE, Chen J, McNiven MA.
J Cell Sci. 2005 Mar 15;118(Pt 6):1279-90. Epub 2005 Mar 1.
Dynamin 3 is a component of the postsynapse, where it interacts with mGluR5
and Homer.
Gray NW, Fourgeaud L, Huang B, Chen J, C... 阅读全帖 |
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H*g
发帖数: 2333 | 8 Photoshop + Adobe Illustrator
My experience is, if eventually you are going to learn a tool, why not go
directly to these two ultimate tools? Don't waste time on others. Save every
figure in .psd file, and subsequently place in illustrator and save as .eps
file. It will be very
easy to assemble these files into one .eps file later. |
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H*g
发帖数: 2333 | 9 You are asking two different questions here. In the title, you mentioned
about handling figures when writing manuscript; However, in the paragraph,
you are also asking for handling those for meetings/daily lab reports.
Let me share with you something I learned from my adviser. Save your figures
in whatever format you can with enough resolutions (like .tiff), you could
label the figures in your lab notebook.
When you feel you could have a figure/subfigure for publication, slow down,
put everythin... 阅读全帖 |
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f**********n
发帖数: 258 | 11 想都不用想 毫无疑问 Square. Jack Dorsey刚刚贡献出来公司10%的股票给新员工 激
励员工的忠诚度。Jack Dorsey创建的上一个公司叫Twitter。上市之前6个月左右的
Offer也是20万左右 不过一股是按照20几算得 现在看看Twitter的股票，4年光股票就
1 Million加上Base,4年可以拿1.5个million。拿到了PSD中最稳的Square，不需要考虑
了。Believe Jack and go to Square. 这个帐很清楚了吧 |
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w******n
发帖数: 13202 | 12 tof的分辨率不高。2000到4000范围的，分子量误差在0.5到1.5的话，也不算过分了。
看你
干啥用了，如果是多肽，可以考虑做个PSD，看看能不能有片段谱。
如果是分子鉴定，还不如送到专门的结构，打高分辨electrospray吧
吗？ |
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k******6
发帖数: 7 | 13 Purpose
The Center for Nanophase Materials Sciences (CNMS) at Oak Ridge National
Laboratory (ORNL) is seeking a Postdoctoral Research Associate with
experience and expertise in organic spintronics, with a strong emphasis on
the design, fabrication and characterization of organic spintronic device.
The CNMS http://cnms.ornl.qov/ is a nanoscience research facility supported by the Office of Science, U.S. Department of Energy (DOE). The CNMS has a diverse spectrum of nanoscience activities includ... 阅读全帖 |
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g***i
发帖数: 90 | 14 未必阿。部分行是可以的如
[2 1 0
1 2 1
0 1 2]
关于positive definite, diagnonal dominant matrices, 确切
的常用结论大概只有strictly diag dom ==> psd |
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t****t
发帖数: 610 | 15 试着将一个刚做完的psd格式的图作为图层放到另外一个图里。然后用edit->transform
->scale拉大一点。但是一拉图就失真，只看到一个个马赛克。这种问题时有时无。比
如说，如果在原图里把图拉大，就不失真，然后再放到新图就没事。
而且，改变新图里原有的图层没有失真。
请问问题出在那里？
谢谢。 |
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V*****i
发帖数: 92 | 16 MVDR被称为super-resolution algorithm, 可是我用MVDR算法计算PSD(Power Spectrum
Density)时，却发觉他的分辨率不是很尽入人意。如果一两个不同频率的信号的话(e.
g. 5Hz 10Hz)，他可以很清楚的分辨出来，可是有三四个不同频率的信号的话(e.g.
5Hz 10Hz 15Hz 20Hz)，他们的频率相应就拈在一起了，根本无法分辨。有谁明白这是
怎么回事？ |
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f*****g
发帖数: 30 | 17 知道一个随机变量序列的几率分布（pdf）和时间相关函数（或功率频谱psd），如何产
生一个符合这些性质的序列？
pdf不是高斯分布。 |
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X*****r
发帖数: 2521 | 18 【 以下文字转载自 Mathematics 讨论区 】
发信人: Xfilter (大好河山美如画), 信区: Mathematics
标 题: 请问有什么optimization变量是matrix的？
发信站: BBS 未名空间站 (Wed Jul 30 22:47:52 2008), 转信
比如变量是一个psd matrix
有专门对付这种变量是一个matrix的optimization类型吗？
多谢指点！ |
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le
发帖数: 190 | 19 I understand it's white. The input signal doesn't necessarily need to be
random, it just need to be busy.
I just don't see why its spectrum is from DC to fs/2. Of course, it cannot
be infinity, otherwise the PSD has to be zero.
disitribution between [-max +max]. This is just an assumption. According to
this assumption, the quantization noise for each sample will be independent
to each other with the same distribtion. Power spectrum of i.i.d random
process is white. |
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d*****l
发帖数: 8441 | 21 PSD就是对随机信号而引入的概念，要不然就不是统计信号分析了。
对于确定性的信号，很简单，只要考虑确定的频谱就可以了。
对于随机信号，当然也可以对它的某一个特定的样本来分析其确定
的频谱，但是那就不是统计特征了。 |
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a****l
发帖数: 8211 | 22 谢谢！
与次相关的，如果是用welch方法，如果用不同的window，比如retangular, hanning,
hamming，难道出来的PSD会有很大的区别？比如说，一个是-14db,一个是-12db，差别
会这么大吗？
bad |
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d*****n
发帖数: 754 | 23 Regulatory knowldge on Title V permit, PSD NSR BACT
Emission inventory preparation, using emission factors, need skills in Excel
AERMOD dispersion modeling. |
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w****1
发帖数: 2 | 24 你要懂 title V, PSD, NSPS, NESHAP. 关键是经验， 时间越长越好，当然ｃｏｍ
ｍｕｎｉｃａｔｉｏｎ ｓｋｉｌｌｓ ａｒｅ ｕｂｅｒ ｉｍｐｏｒｔａｎｔ． |
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w*****3
发帖数: 2301 | 26
So if u are learning or u can touch Air Quality, the market might be kind of
good for u as far as I know. Since EPA is pushing GHG regulation so hard,
it might create many new position as planed though people doubt the truth of
Global Warming. If possible, look at GHG measurement and detection, AEI,
permitting, dispersion modeling...
Some news, March 2009 EPA might finalize PSD/TV for GHG.
Jan 2011 EPA will employ GHG measurement tech to gather data for its new
reporting rule.
2012 Congress mig |
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w*****3
发帖数: 2301 | 27 我高空气的,现在高GHG, 几乎就是每天读法规, 分析每一条款可能与我们公司有关的,
然后写计划实施以符合法规要求.
搞水,土壤的我不了解.空气环境专业的机会少,工资一般.但是比较稳定.所以只要能进
门,就没什么问题了.
所以多看招工广告要求, 上面回写你要知道NPDES, EPW, TV/PSD, NSPS, NESHAP...
然后就可以google 一些细节丰富你的简历.
努力学习然后等待机会!! |
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w*****3
发帖数: 2301 | 28
1. keep searching and never give up
2. customerize resumes for each position and never use same resume for any
jobs
3. dont miss any opportunities. aslongas ur experience relates to the job,
even 1%, u can try that position.
4.for air, u might pay more attention to air dispersion modeling area since
it requres more data analysis skills than communication that is our weakness
5. if possible, look at each state and EPA webpages, get familiar with those
permitting terms like TV/PSD/NSR/Major/Minor |
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w*****3
发帖数: 2301 | 29
permit是对公司的，不是考试。
抛砖引玉把， 我做permit也不久。
简单点地说，按照联邦和州空气法规，大的排放源乡电厂，炼油厂，水泥厂，化工厂等
等，如果运行操作技改, 操作员必须获得air permit。permits非很多种类。以，TX为
例，有gop,fop,pbr,standard...如果你感兴趣，可以上tceq 网站看看。
每个州都不不大一样，但基本的内容是类似的。其中对于较大的装置，需要TV/PSD德，
aermod modeling 就是必须的了。
当然，这是针对工业公司的。如果你想做research, modeling 应该有更多机会。 |
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d*****n
发帖数: 754 | 30 还有环境法规，NAAQS， PSD， CAA TitleV |
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d**********d
发帖数: 39 | 31 Permit types:
PSD/NSR
Title V
Major source
Minor source
General
Federal/state regulations and guidance:
EPA 40 CFR Part 51 Appendix W
NSR Workshop Manual
State Modeling guidance
EPA recent memo on modeling demonstration for PM2.5, 1-hr NO2, and 1-hr SO2;
FLAG 2010 report for AQRV analysis
BART
MACT
Models:
AERMOD
CALPUFF
Emission Inventory:
AP-42
Computer:
FORTRAN, Linux |
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w*****3
发帖数: 2301 | 32 看epa GHG MRR
GHG PSD/TV taloring rule?
which state? |
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w*****3
发帖数: 2301 | 33 keep trying the consulting firms and should find one soon!
as far as know, houston market is hotter so pay more attention to oil and
gas industries.
go to TCEQ/EPA to learn basic air rules/terms and put them into your resumes
.like EI,PBR, SP,NSR, TV, PSD, GHG, CAA, Criteria Air Pollutants, HAP, NSPS,
NESHAP, MACT, SCREEN3/ISC3, AERMOD... are most important keywords HR is
searching.
it is a little bit easier to get a job with consulting firms compared with
industries.again it depends on your exp... 阅读全帖 |
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w*****3
发帖数: 2301 | 34 中国石油工业使用什么标准？你先研究一哈。。。
you go to EPA and there is ton of control info for oil and gas industry. for
example, find a PSD for a refinery and you will see the BACT, listing all
control options for this type of facility.
the point is not about difference and is about whether China is willing to
implement those regulations and enforce them. |
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g*******g
发帖数: 1164 | 35 【 以下文字转载自 StartUp 讨论区 】
发信人: knockout (桂花园||回家), 信区: StartUp
标 题: 显摆下我做的网站
发信站: BBS 未名空间站 (Thu Apr 16 14:12:32 2015, 美东)
Update:
写代码晕了之后随便写的帖子竟然也有了几百个点击，然后版主还mark了。再多写一点
，说说我的背景和我的一些看法，希望对正在或者想创业的版友有帮助。
鄙人本科学环境工程，期间学了点C编程，考试的分数还算不错。看过半本PHP入门。对
编程勉强不算陌生。近十年之后想正儿八经的写点代码的时候很快就捡起来了。现在做
的这个网站总体来看，反应也比较正面。
我讲这个是想和大家分享我的一个看法：技术的民主化。通俗的说，就是技术的门槛正
在不断的降低。我最熟悉的各项生物实验技术，显然如此。在国内读研的时候，实验室
的师兄花费一整天时间一次大提能搞出1.x毫克的质粒，我们都佩服的不得了。现在用
kit，做一次max prep几个小时搞定，根本就不是个事。PhD的时候实验室做行为学，老
板时常消化molecular biology就是个weekend ... 阅读全帖 |
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X*****r
发帖数: 2521 | 36 比如变量是一个psd matrix
有专门对付这种变量是一个matrix的optimization类型吗？
多谢指点！ |
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X*****r
发帖数: 2521 | 37 比如
\sum det(A'*X_i* B)
A B 是常数矩阵
X_i是i个PSD
这种？ |
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X*****r
发帖数: 2521 | 38 其实我是想证明 找到一个最优的P,使得P*P,也就是P^2 的 spectral radius 最大
而且所有的P都有一样的steady state distribution
pi * P = pi
find --> argmax_{P} \rho (P^2) |
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o*******w
发帖数: 349 | 40 这是我做的一些笔记的例子. 我自己是造不出这些, 我想表达的, 句子的. 笨人如我，
就得花些笨功夫
(JOEL A. TROPP "USER-FRIENDLY TAIL BOUNDS FOR SUMS OF RANDOM MATRICES")
... There is another contemporary line of research that uses ...
... In a significant article [Rud99], Rudelson obtains an optimal
estimate for the sample
complexity of approximating the covariance matrix of a general isotropic
distribution.
... By now, there is a substantial literature on other nc moment
inequalities.
... The argument in his paper, which is due to Pis... 阅读全帖 |
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y******r
发帖数: 2986 | 41 我用过一次PSD (ABAQUS)
感觉就是一种频域的随机震动，结果用来解释时域的响应
公式我能够看个大概，不过理解不深，也只做过一次，所以说不太清楚
请高手们指点一下吧 |
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k******6
发帖数: 7 | 42 Purpose
The Center for Nanophase Materials Sciences (CNMS) at Oak Ridge National
Laboratory (ORNL) is seeking a Postdoctoral Research Associate with
experience and expertise in organic spintronics, with a strong emphasis on
the design, fabrication and characterization of organic spintronic device.
The CNMS http://cnms.ornl.qov/ is a nanoscience research facility supported by the Office of Science, U.S. Department of Energy (DOE). The CNMS has a diverse spectrum of nanoscience activities includ... 阅读全帖 |
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G*******n
发帖数: 2041 | 43 我们那儿没杀人犯
病人说话的语气有变，或者声音太大，立即就有更多的人介入
多数病人是SI，SAD， MDD，PSD 还有mental retardation |
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k******6
发帖数: 7 | 44 Purpose
The Center for Nanophase Materials Sciences (CNMS) at Oak Ridge National
Laboratory (ORNL) is seeking a Postdoctoral Research Associate with
experience and expertise in organic spintronics, with a strong emphasis on
the design, fabrication and characterization of organic spintronic device.
The CNMS http://cnms.ornl.qov/ is a nanoscience research facility supported by the Office of Science, U.S. Department of Energy (DOE). The CNMS has a diverse spectrum of nanoscience activities includ... 阅读全帖 |
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m*******r
发帖数: 98 | 45 The correlation matrix is PSD. [-0.5,1] |
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B***y
发帖数: 83 | 47 这是道非常有意思的题目。涉及到凸集结构。
首先在一个 Banach space B 中，
我们定义一个凸集 C 为
1) If x, y \in C, then for t \in [0, 1], tx + (1-t)y \in C.
现在定义 C = set of all n*n seme-positive definite matrix A = (aij), with each
element aij \in [0, 1].
定义 C_k = set of all n*n seme-positive definite matrix A = (aij), with each
element aij \in [0, 1], with rank >= k.
那么 C 在所有 n*n 对称矩阵中，给出了一个凸集。更重要的是 C_k 也是凸集。
凸集的一般事实是：如果存在于有限维空间中，则总存在 basis, 即线性
无关向量集。( reference: 张恭庆，关肇直：线性泛函分析讲义，convex analysis,
1977
J.T. Marti.)
Theorem ( Minkows |
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o**p
发帖数: 2 | 48 I think what Boll means is: You got k(k+1)/2 rank 1 matrix
decomposition of the original matrix. And each rank 1 matrix can
be represented by the vector.
For your answer. Yes, it's easy to get the 'spectral' decomposition.
But those factors may not be satisfy the requirment [0,1], as you
mentioned. But this requirment is important.
each
each
analysis,
\in C,
+ S
norm, |
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a******n
发帖数: 11246 | 50 为了这个.eps后缀，基本上折腾了一个晚上。
我现在可以存为jpg,pdf,psd等等；但是如果我用虚拟打印机
打印成.eps文件，要么latex说没有bounding box，要么就是一个小图片
占一整页(我估计是因为bounding box过大)
另外一个办法是我保存为大小合适的jpg，
然后在这个网站：www.go2convert.com/
转为.eps文件。但不知道为毛，转成eps文件后
竟然变成黑底白字。。。郁闷。
哪位大牛点拨一下... |
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