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【求助】Casteps几何优化中,遇到这样的提示通常该怎没办?
+------------+-------------+-------------+-----------------+ <-- min BFGS
| Step | lambda | F.delta | enthalpy | <-- min BFGS
+------------+-------------+-------------+-----------------+ <-- min BFGS
| previous | 0.000000 | 0.006740 | -24117.462487 | <-- min BFGS
| trial step | 1.000000 | -0.010705 | -24117.315957 | <-- min BFGS
| line step | 0.386363 | -0.003071 | -24117.436342 | <-- min BFGS
| quad step | 0.224039 | -0.001694 | -24117.449946 | <-- min BFGS
+------------+-------------+-------------+-----------------+ <-- min BFGS
BFGS: reverting to earlier configuration
BFGS: finished iteration 39 with enthalpy= -2.41174625E+004 eV
+-----------+-----------------+-----------------+------------+-----+ <-- BFGS
| Parameter | value | tolerance | units | OK? | <-- BFGS
+-----------+-----------------+-----------------+------------+-----+ <-- BFGS
| dE/ion | 1.848121E-005 | 5.000000E-005 | eV | Yes | <-- BFGS
| |F|max | 5.391142E-001 | 1.000000E-001 | eV/A | No | <-- BFGS
| |dR|max | 2.622797E-002 | 5.000000E-003 | A | No | <-- BFGS
+-----------+-----------------+-----------------+------------+-----+ <-- BFGS
BFGS: Warning - Repeated consecutive reset of inverse Hessian
BFGS: without satisfying convergence criteria which
BFGS: looks like BFGS has run out of search directions.
BFGS: Warning - Lets try allowing some uphill steps and see if
BFGS: we can get around this barrier.
BFGS: Warning - It is possible that the system may now converge to
BFGS: a stationary point OTHER than the desired minimum.
BFGS: Hint - this may be an indication that either:
BFGS: a) you are using a poor guess at geom_frequency_est
BFGS: and/or geom_modulus_est, or
BFGS: b) you are using unrealistic convergence criteria.
BFGS: Suggest therefore that you consider changing them!
================================================================================
Starting BFGS iteration 40 ...
======================================================================小弟金币仅60,分一半出来,答谢各位!
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