z******a
发帖数: 582 | 1 我拿到一个PhD offer, 老师的主要方向是radio propagation for wireless
communications （advanced propagation modeling & RF channel
characterization ）。他的其它相关方向还有antennas ， computational
electromagnetics。
想问问大家,老师的这几个方向哪个相对好些? |
|
z******a
发帖数: 582 | 2 我拿到一个PhD offer, 老师的主要方向是radio propagation for wireless
communications （Advanced Propagation Modeling and RF Channel
Characterization ）。他的其它相关方向还有antennas ， computational
electromagnetics。他所在的研究中心是NSF一个项目的参与者，研究跟MIMO有些关系。
说实话，看了以前的帖子，我也知道跟电磁场和通信相关的方向工作不是很好找。只是
想问问这个方向具体差到什么程度？现在工业界有没有什么前景？
P.S 我申请的大学排名较后，大概150左右。不知道烂校PhD出路如何？ |
|
a***c
发帖数: 2443 | 3 advanced propagation modeling, RF channel characterization, computational
electromagnetics 這三個要找業界工作的話是比較傾向r&d方向. antennas 比較實用,
找工作應該比較好找, 但要注意antenna方面的工作有很多要求citizenship, 我有個
朋友就是在幹ied detection方面的研究的, 好像挺有趣. 純粹個人理解, 我不是學這
個方向的. |
|
m*******s
发帖数: 3142 | 4 I find that some book e.g. Many-body theory of solids by John C. Inkson P145
says that :" By analogy with the classical polarization, we define a
polarization
propagator through the relationship ... ε=1-vP" , where ε is the
dielectronic response function, and v is the bare Coulomb potential.
I do not remember such relationship in electrodynamics. Can anybody remind
me of it?
In fact, on the next page in the book, I find a new relationship i.e. P=δρ
/δV， where V is the total potential instead of |
|
d******4
发帖数: 132 | 5 neural network的这个back propagation algorithm算法，面试的时候会问什么样的问
题呢？多谢了。 |
|
f**d
发帖数: 768 | 6 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
|
发帖数: 1 | 7 QUANTUM SPACE ELEMENTS (QSE)
INTRODUCTION
This is a non-mathematical proposal introducing a cosmological model that is
cyclic, deterministic and infinity-free. For the purpose of achieving this
objective a number of new concepts are introduced. The framework of this
proposal is structured over a number of assumptions, leading to various
considerations of cosmological concerns. Furthermore, verification methods
are suggested of both, observational and mathematical nature.
ASSUMPTIONS
Space is dis... 阅读全帖 |
|
发帖数: 1 | 8 spring mvc+hibernate,query性能相当差，首先有n+1问题，这个我能解决。但改了之
后还是很慢，看来一下log时间大部分花在“HibernateTransactionManager:362 -
Found thread-bound Session。。。“上。这个query需要取较多的nested objects所
以导致hibernate session里的objects比较多，然后每次call service里任何function
访问以取出的entities时都会导致去retreive这个session. 有什么方法可以减少这个
开销呢？我试过好像readonly transaction没啥用。stateless session好像用join
fetch出错（这个要再试）。如果我把所有使用以取出的entities操作都搬到service之
外速度立即飞快。不是很理解这个是否和transaction有关。以下为hibernate config:
阅读全帖 |
|
f*******a
发帖数: 80 | 9 The concepts of TE and TM mode vary depending on the context.
a) If you talk about the plane wave propagating in the free space, the
electromagnetic wave is a transverse wave, i.e. the direction of the
electric field and magnetic field are perpendicular to the direction of wave
propagation. This is in contrast to elastic wave, in which the direction of
partical flow can be either perpendicular or parallel to the direction of
propagation. In this context, we don't talk about the mode.
b) Electrom... 阅读全帖 |
|
s*******1
发帖数: 191 | 10 2012-11-02晚上Osifu開示
Osifu經常說一句話“該說的都已經說了，但心裏還是想給大家說些什麼。”
Osifu有太多太多的心聲要宣流給大家，Osifu明白自己的心，無非是反復地講同樣的內
容。
Osifu有時也笑自己，Osifu為人惜字如金，可是一旦給大家開示，即使給一個人開示都
會滔滔不絕，有說不完的話。
心呀！殷切咐囑。
心呀！苦口婆心。
心呀！不知疲憊。
心呀！懇切迫切。
有時，Osifu也會和自己的心靈對話。
Osifu理解自己的心，Osifu的心只有一件事要做--造福蒼生，普濟億靈。
Osifu的心釋放出強大的驅動力、推動力、加持力使Osifu把所有的時間、精力都放在造
福蒼生普濟億靈上。
Osifu無法做到不想這件事情、不做這件事情。心的力量太強大了！
宇宙間最強大的力量就是心的力量！這是Osifu親修實證來的智慧之一。
Osifu甚至可以進一步講，心的力量主宰一切。
Osifu的心主宰Osifu的命運，Osifu的心主宰Osifu的一切。
Osifu相信自己的心，Osifu是一個活在心靈中的人。
Osifu的心是Osifu的師父。
OsiOsifu的心是Os... 阅读全帖 |
|
t*****y
发帖数: 445 | 11 Summary of the Amazon EC2 and Amazon RDS Service Disruption in the US East
Region
Now that we have fully restored functionality to all affected services, we
would like to share more details with our customers about the events that
occurred with the Amazon Elastic Compute Cloud (揈C2 last week, our
efforts to restore the services, and what we are doing to prevent this sort
of issue from happening again. We are very aware that many of our customers
were significantly impacted by this event, and as ... 阅读全帖 |
|
g********d
发帖数: 19244 | 12 ☆─────────────────────────────────────☆
bds16 (song) 于 (Mon Apr 1 12:00:27 2013, 美东) 提到:
纠结很久了，到底该买个大车还是来个fun car。
最后决定趁着年轻，搞个fun car 玩玩，预算4w-4.5w
初步定了几款 FX35/37 G35 350z 328 c250 都是入门车
350z 直接被lp淘汰，说像“包子”。。。
G35 开了开，方向盘指向性很差，样子很帅！
FX37 我的大爱，就是稍微贵了点，而且这个车以后年纪大了也能开，最后决定选个入
门德车玩玩。
c250 coupe 和 328 coupe
我个人比较倾向BMW，国内玩过5系，不是自己的车，不用保养，就是拿来瞎搞，很爽！
周末现在门口的benz 转了一圈，看看了c250 coupe 红色，LP 一眼就看上了，车里面
确实能稍微看出点好车的影子，做工也很细致。没有试驾，不知道为什么看车的人很多
，saler 不够。而且我心系bmw，拉着老婆奔向BMW
废话不说了，挑了辆白色 328 coupe 直接跑上高速。这车的内饰... 阅读全帖 |
|
f******6
发帖数: 68 | 13 来自主题: Immigration版 - 审稿转让 现转让一篇英国皇家化学学会的杂志的稿子.
如果有相关的经验,又需要审稿,请把你的名字,单位,非个人的email发到我的邮箱.
Molecular BioSystems
TITLE: Prediction of drug-target interaction by label propagation with
mutual interaction information derived from heterogeneous network
ABSTRACT:
Identification of potential drug-target interaction pairs is very important,
which is not only for providing greater understanding of protein function,
but also for enhancing drug research, especially for drug function
repositioning. Recently, numerous machine learning... 阅读全帖 |
|
p*******r
发帖数: 59 | 14 Career Opportunities at JCVI Infectious Disease (8 Positions)
The PIs did not ask me to post here, I did this just in case someone is
looking for similar positions but did not see these, and I would be happy to
see some chinese fellows to come. All the PIs are very nice.
All listed at
https://careers.jcvi.org/careers/Careers.aspx
http://www.jcvi.org/
No. 1 & No. 2 Post-Doctoral Fellows
Job Responsibilities
JCVI is looking for two Post-Doctoral Fellows to join the Infectious Disease
Group in our ... 阅读全帖 |
|
g*****n
发帖数: 250 | 15 I speculated, yesterday, how they picked NTCP as a candidate receptor for
HBV. There is nothing wrong to select a candidate based on knowledge. The
key is to determine whether that is the one you are looking for with
evidence. Let’s see how they tested whether NTCP is the receptor for HBV.
(1) They transfected NTCP into cells, cross-linked the viral proteins,
and ran Western. Again, overexpression, forced linking, all are too
artificial. They should look at the native NTCP protein, but they ... 阅读全帖 |
|
l**********1
发帖数: 5204 | 16 非植物 或哺乳的数据库区别也 植物的也 一样在完善
关键是楼主有无NGS and HMM （Hidden Markov Models 的背景或能找到那种背景的
合作人
pls refer
PMID 23435661
by Van der Does D et al., (2013).
Salicylic acid suppresses jasmonic acid signaling downstream of SCFCOI1-JAZ
by targeting GCC promoter motifs via transcription factor ORA59.
Plant Cell. 25: 744-61.
Abstract:
ignored
In silico promoter analysis of the SA/JA crosstalk transcriptome revealed
that the 1-kb promoter regions of JA-responsive genes that are suppressed by
SA are significantl... 阅读全帖 |
|
s********3
发帖数: 231 | 17 《科学》对STAP手稿的专家评审意见曝光
《科学》对传说中的STAP细胞论文的三名评审专家意见，过去一直被雪藏，今天终于
被曝光。专家对这一研究的评价不高，认为非常全面的描述性研究，如果结果确定，可
能导致发育生物学大厦的颠覆，其实是不相信这种研究结论。因为没有当时的投稿件，
所以没有办法对这些评价进行更深入分析。不过这些资料显然都在某个地方，只是拥有
的人不愿意拿出来。
Retraction Watch readers are of course familiarwith the STAP stem cell saga,
which was punctuated by tragedy last month whenone of the authors of the
two now-retracted papers in Nature committed suicide.
In June, Science‘s news section reported:
Sources in the scientific community confirm that early version... 阅读全帖 |
|
s*******g
发帖数: 52 | 18 一共是五篇，非常感谢您的帮助
1.
Journal： Key Engineering Materials (Volume 217)
（Volume： Self-Propagating High-Temperature Synthesis ）
Pages 159-164
Authors： K.L. Smirnov, I.P. Borovinskaya
2.
Journal Key Engineering Materials (Volume 217)
（Volume： Self-Propagating High-Temperature Synthesis ）
Pages 153-158
Authors： Bao Lin Zhang, Han Rui Zhuang, Wen Lan Li, Suying Xu, Xin Yu Luo,
Xin Rui Xu
3.
Journal Key Engineering Materials (Volume 217)
(Volume Self-Propagating High-Temperature Synthesis )
Pages 173-184
A |
|
s*******g
发帖数: 52 | 19 一共是五篇，非常感谢您的帮助
1.
Journal： Key Engineering Materials (Volume 217)
（Volume： Self-Propagating High-Temperature Synthesis ）
Pages 159-164
Authors： K.L. Smirnov, I.P. Borovinskaya
2.
Journal Key Engineering Materials (Volume 217)
（Volume： Self-Propagating High-Temperature Synthesis ）
Pages 153-158
Authors： Bao Lin Zhang, Han Rui Zhuang, Wen Lan Li, Suying Xu, Xin Yu Luo,
Xin Rui Xu
3.
Journal Key Engineering Materials (Volume 217)
(Volume Self-Propagating High-Temperature Synthesis )
Pages 173-184 |
|
s*******g
发帖数: 52 | 20 谢谢各位大哥大姐了，真的！
1.
Journal： Key Engineering Materials (Volume 217)
（Volume： Self-Propagating High-Temperature Synthesis ）
Pages 159-164
Authors： K.L. Smirnov, I.P. Borovinskaya
2.
Journal Key Engineering Materials (Volume 217)
（Volume： Self-Propagating High-Temperature Synthesis ）
Pages 153-158
Authors： Bao Lin Zhang, Han Rui Zhuang, Wen Lan Li, Suying Xu, Xin Yu Luo,
Xin Rui Xu
3.
Journal Key Engineering Materials (Volume 217)
(Volume Self-Propagating High-Temperature Synthesis )
Pages 173-184
Au |
|
d********y
发帖数: 176 | 21 http://onlinelibrary.wiley.com/doi/10.1002/masy.19910420119/pdf
Article
Inhibiting or cocatalytic effect of water and other additives on cationic
polymerization of cyclodimethylsiloxanes
Authors
P. Sigwalt,
C. Gobin,
P. Nicol,
M. Moreau,
M. Masure
First published: March 1991Full publication history
DOI: 10.1002/masy.19910420119View/save citation
Cited by: 14 articlesCitation tools
Funding Information
Abstract
Cyclodimethylsiloxanes such as hexamethylcyclotrisiloxane (D3) and
octamethyl-cyclotetr... 阅读全帖 |
|
w*****1
发帖数: 220 | 22 Dear Readers,
We are happy to present the first five papers that are published in our
new, open access journal, Physical Review X. These papers, together with
others that are to be published in the coming weeks into September, will
constitute the first issue of the journal. Under PRX's open access
publishing model, they are free for you to read and use.
We are very encouraged by the breadth of their topical spread. It ranges
from the well-established field of atomic, molecular and optica... 阅读全帖 |
|
f**d
发帖数: 768 | 23 Terrence J. Sejnowski
Professor and Laboratory Head
Computational Neurobiology Laboratory
Terrence J. Sejnowski, professor and head of the Computational
Neurobiology Laboratory, is a pioneer in the field of computational
neuroscience.
Education
B.S., Physics, Case Western Reserve University
Ph.D., Physics, Princeton University (J.Hopfield was his Ph.d advisor)
Postdoctoral fellow, Biology, Princeton; Neurobiology, Harvard Medical
School
听过几次TERRY的报告，其人说话很快，激情，典型的物理系学者的模式。
http://www.salk.edu/fac... 阅读全帖 |
|
发帖数: 1 | 24 “神韵艺术团”是由“法轮功”头目李洪志直接指挥的邪教附属组织。“神韵艺术
团”打着“弘扬中华传统文化”的幌子在世界各地大搞所谓的“神韵演出”，并吹嘘该
演出是“五千年历史文化蕴含的神圣之美，是一生中不容错过的奇观”，欺骗不明真相
的民众前往观看。李洪志本人更公开声称，“神韵晚会”是他让各地“法轮功”组织举
办的。晚会“不是给常人娱乐的”，而是“要展现大法弟子的风貌……救度众生、讲清
真相”。事实证明，所谓“神韵晚会”根本就不是什么文艺演出，而是“法轮功”搞邪
教和反华宣传，扩大影响并聚敛钱财的政治工具，是对中华传统文化的玷污和歪曲，是
对观众的欺骗、愚弄和毒害。
“神韵晚会”内容充斥政治色彩。
2017年3月3日，加拿大《环球邮报》网站登载了女作家、该报舞蹈评论员兼艺术创
作人玛莎·夏巴斯(Martha Schabas)的评论文章。作者描写了观看“法轮功”的“神韵
艺术团”在多伦多演出前后的感受,批评“神韵”假借艺术之名而暗中行“法轮功”宣
传之实,存在“粗鲁的政治动机”。
玛莎·夏巴斯(Martha Schabas)
2015年4月29日，美国《外交政策》杂志（Foreign Po... 阅读全帖 |
|
j***h
发帖数: 4412 | 25 Earthquake detection systems can sound the alarm in the moments before a
big tremor strikes—time enough to save lives
Japan’s system, which went live in 2007, makes heavy use of personal
technology. Alerts go out not only on television and radio but through
special receivers in homes, offices and schools. Pop-up windows on
computers show a real-time map with the epicenter’s location and the
radiating seismic waves. A timer counts down to the shaking at your
location and highlights predicted inte... 阅读全帖 |
|
w*********g
发帖数: 30882 | 26 高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发展的极限。目前虽然涌现出一些
新型航空发动机技术，但仍然没有走出依靠压力膨胀过程来实现热功转换的思路。他强
调，人们应该另辟蹊径，寻找其他可用的工作原理。为此，他研究了自然界龙卷风的形
成与强化机制，发明了一项称为"余热增推"的技术，直接利用龙卷旋涡实现热功转换并
提取... 阅读全帖 |
|
K**********n
发帖数: 1197 | 27 增加电感系数吧，这是低频波段了。AM最低的频率也是200kHZ了吧？
三个波段，
Long wave is 153–279 kHz, with 9 kHz channel spacing generally used. Long
wave is only used for radio broadcasting in ITU region 1 (Europe, Africa,
and parts of Asia), and is not allocated elsewhere. In the United States,
Canada, Bermuda, and U.S. territories, this band is mainly reserved for
aeronautics navigational aids, though a small section of the band could
theoretically be used for microbroadcasting under the United States Part 15
rules. Due to th... 阅读全帖 |
|
w*********g
发帖数: 30882 | 28 看看欧美，黑穆三拉大行其道。真正的人才没有施展才能的动力，没有才能的废物天天
吃福利过好日子，这样的社会怎么会持续进步，怎么会不停地进化？
达尔文曾经说过
Thus the weak members of civilized societies propagate their kind. No one
who has attended to the breeding of domestic animals will doubt that this
must be highly injurious to the race of man. It is surprising how soon a
want of care, or care wrongly directed, leads to the degeneration of a
domestic race; but excepting in the case of man himself, hardly any one is
so ignorant as to allow his worst animals to breed. The... 阅读全帖 |
|
F****y
发帖数: 145 | 29 https://en.wikipedia.org/wiki/Shock_wave
Detonation wave[edit]
Main article: Detonation
A detonation wave is essentially a shock supported by a trailing exothermic
reaction. It involves a wave travelling through a highly combustible or
chemically unstable medium, such as an oxygen-methane mixture or a high
explosive. The chemical reaction of the medium occurs following the shock
wave, and the chemical energy of the reaction drives the wave forward.
A detonation wave follows slightly different ru... 阅读全帖 |
|
s******g
发帖数: 437 | 30 凑个热闹。
Quora上这个话题是老生常谈。下面链接里这个华裔小哥的回答从逻辑上解释为什么会
这样，觉得比较容易懂。
What's the fundamental reason why the speed of light cannot be broken? Why
does the universe want to preserve the upper barrier on speed of light so
much so that it readily slows down time rather than see the speed barrier
broken?
https://www.quora.com/Whats-the-fundamental-reason-why-the-speed-of-light-
cannot-be-broken-Why-does-the-universe-want-to-preserve-the-upper-barrier-on
-speed-of-light-so-much-so-that-it-readily-slows-down-time... 阅读全帖 |
|
D**S
发帖数: 24887 | 31 首先要感谢你支持同性婚姻合法化．
我好奇以下这几个问题：
１．什么叫"teach kids about LGBT"? 我的理解是学校课程里包含LGBT历史和重要人
物．如果这样，为何不可以教？如果这些不可以教，那么是否顺理可以质问学校课程涵
盖马丁路德金这样的民权运动领袖？
２．你希望你自己的基因能够"propagate",OK,可以理解．那么这个和LGBT有什么关系
呢？他们的存在会导致你的基因变异，还是剥夺你"propagate"的可能？这里面又是什
么个道理呢？
３．关于gay couple领养小孩．请问有什么证据表明他们注定就是＂糟糕而不尽职＂的
父母呢？你使用了"kidless adult"这样的词来指代gay人群，可是你知道越来越多的
gay people都有自己的biological offsprings了，BEING GAY IS NOT NECESSARILY
EQUAL TO BEING KIDLESS, WHILE BEING STRAIGHT DOES NOT GUARANTEE YOU A CHILD.
我实在看不出你这个论点的任何道理来．
or
get
a... 阅读全帖 |
|
发帖数: 1 | 32 “神韵艺术团”是由“法轮功”头目李洪志直接指挥的邪教附属组织。“神韵艺术
团”打着“弘扬中华传统文化”的幌子在世界各地大搞所谓的“神韵演出”，并吹嘘该
演出是“五千年历史文化蕴含的神圣之美，是一生中不容错过的奇观”，欺骗不明真相
的民众前往观看。李洪志本人更公开声称，“神韵晚会”是他让各地“法轮功”组织举
办的。晚会“不是给常人娱乐的”，而是“要展现大法弟子的风貌……救度众生、讲清
真相”。事实证明，所谓“神韵晚会”根本就不是什么文艺演出，而是“法轮功”搞邪
教和反华宣传，扩大影响并聚敛钱财的政治工具，是对中华传统文化的玷污和歪曲，是
对观众的欺骗、愚弄和毒害。
“神韵晚会”内容充斥政治色彩。
2017年3月3日，加拿大《环球邮报》网站登载了女作家、该报舞蹈评论员兼艺术创
作人玛莎·夏巴斯(Martha Schabas)的评论文章。作者描写了观看“法轮功”的“神韵
艺术团”在多伦多演出前后的感受,批评“神韵”假借艺术之名而暗中行“法轮功”宣
传之实,存在“粗鲁的政治动机”。
玛莎·夏巴斯(Martha Schabas)
2015年4月29日，美国《外交政策》杂志（Foreign Po... 阅读全帖 |
|
w*********g
发帖数: 30882 | 33 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 民主制度真是个阻止人种进化的落后制度
发信站: BBS 未名空间站 (Fri Nov 16 16:32:12 2012, 美东)
看看欧美，黑穆三拉大行其道。真正的人才没有施展才能的动力，没有才能的废物天天
吃福利过好日子，这样的社会怎么会持续进步，怎么会不停地进化？
达尔文曾经说过
Thus the weak members of civilized societies propagate their kind. No one
who has attended to the breeding of domestic animals will doubt that this
must be highly injurious to the race of man. It is surprising how soon a
want of care, or care wrongly directed, leads to the degeneration of... 阅读全帖 |
|
N*V
发帖数: 350 | 34 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
X*t
发帖数: 1746 | 35 Yes, cracks tend to propagate especially when crack tips are sharp. Drilling
a hole makes the crack tip very blunt, so crack propagation can stop there |
|
a**********s
发帖数: 39 | 36 subaruoutback.org 有人说的
“The person at SOA said that as of this morning, prices for 2013 outback
have been released. It might take up to 24 hours for this information to
propagate through the system and trickle down to the dealerships. ”
真不知道这些dealer用的什么系统 一个pricing要24小时才能propagate。。。 |
|
Y**i
发帖数: 6922 | 37 telecommunication方向的,比如说什么是beam width,什么是RL,如果定义的,公式是什
么?什么是Free Space Loss,如何计算的.什么是propagation,讲讲在network中,如何考
虑propagation?Omnidirectional是什么意思?你懂什么叫network mismatch么?具体是
什么?如果做match?
还有好多其他的问题,有些我真的不知道是什么东西. |
|
c*******u
发帖数: 12899 | 38 ☆─────────────────────────────────────☆
kaixinbb (kaixinbb) 于 (Wed Jan 11 15:46:26 2012, 美东) 提到:
恩， 你还没ready. 你应该40岁后再要孩子， 生不出来问题也不大，因为你的生活已
经很充实了。
☆─────────────────────────────────────☆
HoH (HoH) 于 (Wed Jan 11 15:47:56 2012, 美东) 提到:
也有过类似想法，不过自己决定的事情就要自己承担。生下来就好了，看着孩子觉得其
他什么都不再重要。现在反正也不能退货，干脆放宽心吧。
我们以为拥有昨天和明天，我们以为世界上有假如和意外，其实我们拥有的只是当下，
而事情的发生只有一种可能，那就是你所经历的那一种。如果有什么错了，那不是现实
错了，而是我们的想象错了。
☆─────────────────────────────────────☆
leeking (life is drama) 于 (Wed Jan 11 15:48:11 2012, ... 阅读全帖 |
|
v******r
发帖数: 1630 | 39 http://www.freepatentsonline.com/7433794.html
Mitigation of propagation of thermal runaway in a multi-cell battery pack
A method of mitigating propagation of a thermal event in an energy storage
system having a plurality of cells is disclosed. The method includes the
steps of identifying the heat sources within the energy storage system and
plurality of cells. The method then controls a temperature of the energy
storage system and plurality of cells and also detects predetermined
conditions with... 阅读全帖 |
|
j***h
发帖数: 4412 | 40 Earthquake detection systems can sound the alarm in the moments before a
big tremor strikes—time enough to save lives
Japan’s system, which went live in 2007, makes heavy use of personal
technology. Alerts go out not only on television and radio but through
special receivers in homes, offices and schools. Pop-up windows on
computers show a real-time map with the epicenter’s location and the
radiating seismic waves. A timer counts down to the shaking at your
location and highlights predicted inte... 阅读全帖 |
|
j***h
发帖数: 4412 | 41 Earthquake detection systems can sound the alarm in the moments before a
big tremor strikes—time enough to save lives
Japan’s system, which went live in 2007, makes heavy use of personal
technology. Alerts go out not only on television and radio but through
special receivers in homes, offices and schools. Pop-up windows on
computers show a real-time map with the epicenter’s location and the
radiating seismic waves. A timer counts down to the shaking at your
location and highlights predicted inte... 阅读全帖 |
|
g*****e
发帖数: 10097 | 42 不知道这家伙怎么繁殖，看起来真漂亮啊。
查了下，能扦插，刚刚春天时可不可以试一下？
Propagation:
Propagation of Hardenbergia is easily accomplished by softwood and semi-hardwood cuttings in early spring. Cuttings should be rooted in a mix of 25% peat moss and 75% sand, kept moist and given plenty of light. Note that this mix can contain as little as 65% and as much as 80% sand with no notable difference in the process of rooting cuttings. |
|
y****2
发帖数: 11909 | 43 到明年秋天收获的时候，你就可以看看下面这段。前不久收获的时候，在大球茎的周围
我看到了很多这样的小不奌，附着在主根的周围。把它门轻轻取下来再重新种回土里去
，明年就等着看它们开花结果喽！
“
When you lift your lilies for dividing, you may find small bulblets, in the
clump, which are often clustered along the underground part of the stem.
This is another easy method of natural propagation. Stem bulblets, on
varieties that produce them, will be formed every year. In the fall, you can
hasten their growth to adult bulbhood by carefully detaching them with any
little roots that might have been... 阅读全帖 |
|
i*********t
发帖数: 5873 | 44 Maoist Discourse and the Mobilization of Emotions in Revolutionary China
Modern China May 2010 vol. 36 no. 3 329-362
This article focuses on how Maoist discourse engineered revolutionary
emotions as a method of political mobilization. Based on personal memoirs
and eyewitness accounts, it argues that the Maoist discourse can be
disaggregated into three themes, each aimed at provoking one type of emotion
campaigns; the theme of redemption, which generated guilt in thought reform
campaigns; and the... 阅读全帖 |
|
m**d
发帖数: 21441 | 45 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
f****i
发帖数: 20252 | 46 光纤不是一面镜子，是用两种不同折射率的玻璃实现全反射，其实就是折射，＂电磁波
拐弯＂．你到底学过电磁场和光通讯没？
中波传播距离能比１００MHz的调频广播距离还短？
中波传播方式你自己看Wiki：
http://en.wikipedia.org/wiki/Surface_wave
Radio propagation[edit]
Most long-distance LF "longwave" radio communication (between 30 kHz and 300
kHz) is a result of groundwave propagation. Mediumwave radio transmissions
(frequencies between 300 kHz and 3000 kHz), including AM broadcast band,
travel both as groundwaves and, for longer distances, as skywaves. Ground
losses become lower at lower frequen... 阅读全帖 |
|
D*****r
发帖数: 6791 | 47 A SPEECH OF Mr. JOHN MILTON
For the Liberty of VNLICENC'D PRINTING,
To the PARLAMENT of ENGLAND.
______________________________________________________________
This is true Liberty when free born men
Having to advise the public may speak free,
Which he who can, and will, deserv's high praise,
Who neither can nor will, may hold his peace;
What can be juster in a State then this?
... 阅读全帖 |
|
T*****n
发帖数: 2456 | 48 Contraception
Historically, Christians always have condemned contraceptive sex. The two
forms mentioned in the Bible, and sterilization, are
condemned without exception (Gen. 38:9-10, Deut. 23:1). The Fathers of the
Church recognized that in natural law the purpose of sexual intercourse is
procreation; contraceptive sex, which deliberately blocks that natural
purpose, is therefore a violation of natural law.
Every church in Christendom condemned contraception until 1930, whe... 阅读全帖 |
|
C********g
发帖数: 9656 | 49 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
s*****g
发帖数: 1055 | 50 The vast database needs to be distributed, no question about it. The problem
is the efficiency of new record propagation and existing record querying.
Current model to achieve this is pretty much ad hoc in application level.
If we can figure out a way to design a DNS system such that queries/propagations can be routed/summarized like IP has,that would drastically increase the scalability,
robustness, efficiency of the system. We can do L2 routing already, doing L7
routing is not totally out of q |
|
