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yiran870804

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[交流] Gromacs为什么小体系能跑通,放大体系之后就跑死了?

我的模型很简单。只有非键作用,小体系跑时,可以跑通,放大体系(密度不变),就会跑死,这是什么原因?
       有时候,同样的体系,褪火速率减慢也会跑死,这是为什么?
       麻烦大家帮帮忙,这老死的,真是要崩溃了...
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yiran870804

新虫 (小有名气)


送鲜花一朵
引用回帖:
30楼: Originally posted by jiaoyixiong at 2012-11-07 20:27:39
几点建议:
1、系统变大,大到什么程度?是不是你的计算机内存不够了?
2、是不是你建大体系的时候,模型有问题?下次交流问题的时候,最好把log文件里的错误提示一起贴出来,方便大家帮你找到原因。
3、求助帖子 ...

1.我是在实验室的集群上跑的,内存肯定够
2.放大体系的时候,模型没有改变,只是同样倍数的增大了粒子数和空间   体积(密度不变)
3.log里的错误是

Program mdrun_mpi_v4, VERSION 4.0.7
Source code file: nsgrid.c, line: 357

Range checking error:
Explanation: During neighborsearching, we assign each particle to a grid
based on its coordinates. If your system contains collisions or parameter
errors that give particles very high velocities you might end up with some
coordinates being +-Infinity or NaN (not-a-number). Obviously, we cannot
put these on a grid, so this is usually where we detect those errors.
Make sure your system is properly energy-minimized and that the potential
energy seems reasonable before trying again.

Variable ci has value -2147483648. It should have been within [ 0 .. 125 ]

大致意思就是,速度太快,能量太大吧,但是我小体系的时候,就没有问题啊

这是怎么回事
34楼2012-11-08 16:18:11
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yiran870804(金币+1): 谢谢参与
14楼2012-11-07 18:39:08
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简单回复
2012-11-07 17:35   回复  
yiran870804(金币+1): 谢谢参与
:-O [ 发自手机版 http://muchong.com/3g ]
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