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3Â¥: Originally posted by scottfreedom at 2011-10-28 13:33:37:
There is one exception to the criteria we just looked at, designed to aid in the optimization of large molecules. When the forces are two orders of magnitude smaller than the cutoff value (i.e., 1/ ...

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dreamyeye

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1Â¥: Originally posted by ldzh0531 at 2011-10-28 12:30:22:
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2Â¥2011-10-28 12:58:37
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scottfreedom

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gmy1990(½ð±Ò+3): 2011-10-28 13:44:08
ldzh0531(½ð±Ò+2): лл ²»¹ý¶Ô½á¹¹ÓÐʲôӰÏìÄØ 2011-10-28 21:43:45
There is one exception to the criteria we just looked at, designed to aid in the optimization of large molecules. When the forces are two orders of magnitude smaller than the cutoff value (i.e., 1/100th of the limiting value), then the geometry is considered converged even if the displacement is larger than the cutoff value. This criteria comes into play on very, very flat potential energy surfaces near the minimum, which is common for large, floppy molecules.
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Terse
3Â¥2011-10-28 13:33:37
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ldzh0531

ľ³æ (СÓÐÃûÆø)

ÊÇ×öÓÅ»¯ºÍƵÂÊ£¬³öÀ´ÏÂÃæµÄÐÅÏ¢ÁË£ºItem               Value     Threshold  Converged?
Maximum Force            0.000208     0.000450     YES
RMS     Force            0.000040     0.000300     YES
Maximum Displacement     0.001659     0.001800     YES
RMS     Displacement     0.000269     0.001200     YES
Predicted change in Energy=-3.173785D-07
Optimization completed.
ƵÂÊÁгöÀ´Ö®ºóÓÖ³öÏÖÁË£ºItem               Value     Threshold  Converged?
Maximum Force            0.000208     0.000450     YES
RMS     Force            0.000040     0.000300     YES
Maximum Displacement     0.210729     0.001800     NO
RMS     Displacement     0.028618     0.001200     NO
Predicted change in Energy=-1.450021D-05
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