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wjf12

银虫 (小有名气)

[求助] Gromacs能量最小化问题 已有1人参与

有请高人指点!!!
我运行的是CaO8个晶胞的能量最小化,以下是运行gromacs是遇到的问题:

NOTE 1 [file CaO8.top, line 24]:
  System has non-zero total charge: 2.000000e+00
  


processing coordinates...
double-checking input for internal consistency...
renumbering atomtypes...
converting bonded parameters...
initialising group options...
processing index file...
Analysing residue names:
There are:     1      Other residues
Analysing residues not classified as Protein/DNA/RNA/Water and splitting into groups...
Making dummy/rest group for Acceleration containing 125 elements
Making dummy/rest group for Freeze containing 125 elements
Making dummy/rest group for Energy Mon. containing 125 elements
Making dummy/rest group for VCM containing 125 elements
Number of degrees of freedom in T-Coupling group System is 372.00
Making dummy/rest group for User1 containing 125 elements
Making dummy/rest group for User2 containing 125 elements
Making dummy/rest group for XTC containing 125 elements
Making dummy/rest group for Or. Res. Fit containing 125 elements
Making dummy/rest group for QMMM containing 125 elements
T-Coupling       has 1 element(s): System
Energy Mon.      has 1 element(s): rest
Acceleration     has 1 element(s): rest
Freeze           has 1 element(s): rest
User1            has 1 element(s): rest
User2            has 1 element(s): rest
VCM              has 1 element(s): rest
XTC              has 1 element(s): rest
Or. Res. Fit     has 1 element(s): rest
QMMM             has 1 element(s): rest
Checking consistency between energy and charge groups...
Calculating fourier grid dimensions for X Y Z
Using a fourier grid of 36x36x36, spacing 0.222 0.222 0.222
Estimate for the relative computational load of the PME mesh part: 0.86

NOTE 2 [file em.mdp]:
  The optimal PME mesh load for parallel simulations is below 0.5
  and for highly parallel simulations between 0.25 and 0.33,
  for higher performance, increase the cut-off and the PME grid spacing

This run will generate roughly 0 Mb of data
writing run input file...

[ Last edited by wjf12 on 2014-3-11 at 16:41 ]
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jiaoyixiong

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【答案】应助回帖

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感谢参与,应助指数 +1
月只蓝: 金币+1, 感谢指导! 2014-03-11 18:45:43
wjf12: 金币+2, 有帮助 2014-03-12 21:41:45
你的模型系统整体的电荷不为0
2楼2014-03-11 17:03:10
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wjf12

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月只蓝: 金币+1, 鼓励交流! 2014-03-12 19:09:16
引用回帖:
2楼: Originally posted by jiaoyixiong at 2014-03-11 17:03:10
你的模型系统整体的电荷不为0

一个CaO晶胞的总电荷确实是不为零的啊,首先Ca是+2价,O是-2价,一个晶胞中有14个Ca离子和13个O离子,所以总电荷是+2。
3楼2014-03-11 19:02:22
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wjf12

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自己来顶一下,烦请高人指点。
4楼2014-03-14 20:09:44
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cyl001

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我能量最小化后 显示 No molecules were defined in the system 是哪里出问题了?
5楼2014-03-16 20:14:59
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wjf12

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引用回帖:
5楼: Originally posted by cyl001 at 2014-03-16 20:14:59
我能量最小化后 显示 No molecules were defined in the system 是哪里出问题了?

你预处理时有没报错呢?这个问题比较笼统,应该是你gro跟top文件,哪里有问题吧,你检查下。
6楼2014-03-16 21:51:04
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