b******n
发帖数: 80 | 1 哪个帅哥深入科普下multiple multipole method下吧！！！
哥看得一头雾水，请教高手。 |
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g******i
发帖数: 251 | 2 This was a homework problem when I studied the E&M of Jackson.
The conclusion is if q is not 0, we can find a suitable coordinate so that
p=0. But if q is not 0, Q(i,j) can not be 0.
Further more, the first nonvanishing multipole are independent of the origin
of the coordinate axes, but the values of all higher multipole moments do in
general dependent on the choice pf origin.
You can prove above by descibing the relations of multipole moments before and
after changing the origin of the coordina |
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m********r
发帖数: 811 | 3 multipole expansion
Derive the explicit form in x-y coordinates for the potential contribution
due to the fourth s-derivative T of the octupole strength, for octupole
phase equal to zero, and factor out the fourth derivative of the multipole
strength. What is the value of the coefficient of Tx^8 and Tx^4y^4 ?
Give the answers with 6 digit precision. |
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b*********h
发帖数: 46 | 4 jackson上是关于原点展开的对外的multipole，我要的是关于无穷远点展开的对内的
multipole，可能很类似，但是肯定
还是有差别，如果有现成的推导，就省了自己做了不是？ |
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l******d
发帖数: 73 | 5 Fast Fourier Transform Multilevel Fast Multipole Algorithm in Rough Ocean
Surface Scattering
Published in: Electromagnetics, Volume 29, Issue 7 October 2009 , pages 541
- 552
哪位找到请发到 d*************[email protected] 先谢谢了~ |
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R********n
发帖数: 5904 | 6 你是这个son？
R. M. Erb and H. S. Son and B. Samanta and V. M. Rotello and B. B. Yellen,
Magnetic assembly of colloidal superstructures with multipole symmetry,
Nature, vol. 457 no. 7232 (February, 2009), pp. 999 -- 1002 . |
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o**y
发帖数: 3065 | 7
1992
庄。
Actually Chinese leaders have been so smart, they knew that no country will
be the single dominance of the world in the next century, the world politics
will be in a multipole framwork. US is still the dominance of North America
, Brazil should be the dominance of South America, Germany and France are
both dominance of Western Europe, Turkey will show great potential in middle
east, China will be dominace of Far East. Japan will compete with China,
but Japan has serous demographic probl... 阅读全帖 |
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w********2
发帖数: 97 | 8 A manuscript for EPJ IF ~2
Key words: Multiple multipole method, graphene, theory
Please send me your job title,working address, institutional email, as well
as research background info with publication list. First reply first
recommended. |
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f***r
发帖数: 93 | 9 1.首先你要去在美国的加拿大使馆，办理手续。SINGLE ENTRY 是￥50。
MULTIPOLE ENTRY 是￥100（美圆）但5年内有效。一般一个上午就
可以批准了。
2。 到了加拿大以后，一般不需要去美国使馆签证。至于多少天，我忘了。
因为我是要回国，于是去加拿大顺便签了。如果是旅游的花，你问问加大使馆
就知道，多少天之内不需要去美国签证在加拿大的使馆。
3 如果要去美国使馆（在加拿大）的签证，你需要带上，两张
身风证照片，I20， PASSPORT， LASTEST资助证明，transcript,
主要是这些，你可以在网上查到。
4。签证在加拿大的美国使馆可以在网上预约。
5。 温哥华很不错，尤其是哪里有一家“汗记”的餐馆，应该一去。
跟小香港一样，可惜是冬天，否则还可以去哪里著名的裸体海滩。。 |
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g*******u
发帖数: 5 | 10 If the governing equation is like Poisson or linear
elasticity, you can use Fast-Multipole Expansion method,
which gives you a N*log(N) complexity, else you probably
have to live with N^2. |
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c*******h
发帖数: 1096 | 11 主要是各个 multipole 和 local 的 translation 没搞懂
把我说懂了我可以贡献所有包子
等一下，我看看我有多少钱先。。。 |
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c*******h
发帖数: 1096 | 12 主要是各个 multipole 和 local 的 translation 没搞懂
把我说懂了我可以贡献所有包子
等一下，我看看我有多少钱先。。。 |
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b*********h
发帖数: 46 | 13 一个localized current system, 对外的辐射可以用multipole expansion 来描述。如
果我关心一个local的区域，所有的
current都在这个区域以外，这些current在我的区域之内产生的场，有没有什么类似的
expansion和对应的moment没
有。多谢不吝赐教。 |
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N***m
发帖数: 4460 | 14 印象中multipole expansion不就是展开
1 |
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s*****i
发帖数: 467 | 15 I partly agree with you. Anapole moment is from the multipole decomposition,
but it is nonzero only due to weak interaction.
dovich |
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b******n
发帖数: 80 | 17 不是有大牛在这里吗？这是jackson那本书有的，给个简明提示啊。谢谢了。 |
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k*********g
发帖数: 791 | 18 根据我目前的理解，是个很烂的数值方法，源自法国，一个斯坦福大学的教授做得很欢。
不过，最烂的东西，也是有值得学习的地方的。 |
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