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张伟杰

木虫 (小有名气)

[求助] 求助Forcite 优化晶胞结构

The bonded and the short-range (vander Waals) nonbonded interactions between the atoms were modeledusing the Universal Force Field (UFF). In UFF, bond stretching is described by a harmonic term, angle bending by a three-term Fourier cosine expansion, torsions and inversions by cosine-Fourier expansion terms, and the van der Waals interactions by the Lennard-Jones (LJ) potential. A cutoff distance of 12 Å was used for the LJ interactions.The long-range, electrostatic, interactions, arising from the presence of partial atomic charges, were modeled using a Coulombic term. The  Ewald sum method was used to compute the electrostatic interactions. Partial atomic charges were derived from the charge equilibration method (QEq) as implemented in Forcite.
刚接触forcite ,所以很多不太懂
这段话里面 In UFF, bond stretching angle, bending, torsions and inversions,van der Waals interactions 这些都是怎么设定的 我找不到相关的设置  还有后面的一些描述Ewald sum method, 是在geometry optimization里面设置吗
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Clovetessal

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【答案】应助回帖

感谢参与,应助指数 +1
Ewald sum method在能量设置里面就有啊,跟geometry optimization是没有关系的
2楼2013-04-28 14:21:40
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Clovetessal

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引用回帖:
2楼: Originally posted by Clovetessal at 2013-04-28 14:21:40
Ewald sum method在能量设置里面就有啊,跟geometry optimization是没有关系的

Ewald sum method在能量设置里面就有啊,跟geometry optimization是没有关系的

PWX8BJ$_2](~R1BYSDQT4Q3.jpg

3楼2013-04-28 14:22:50
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张伟杰

木虫 (小有名气)

引用回帖:
3楼: Originally posted by Clovetessal at 2013-04-28 14:22:50
Ewald sum method在能量设置里面就有啊,跟geometry optimization是没有关系的

PWX8BJ$_2](~R1BYSDQT4Q3.jpg
...

你好 ,那请问 bond stretching angle, bending, torsions and inversions,van der Waals interactions 这些参数是在哪个窗口设置的 我找不到 你发给我的 我找到了
还有里面的LJ interactions 是指的那些东西
4楼2013-04-28 16:06:17
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