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====== q ====== **[//quick_refine// !E [//quick_refine_remove// !E]]** //quick_refine// removes parameters that influence _{{{techref_files:image002.gif?20x23}}} in a small manner during a [[#k144|refinement cycle]]. Use of //quick_refine// speeds up simulated annealing, see for example the macro Auto_T which is used in example AE1-AUTO.INP. All refined parameters are reinstated for refinement at the start of subsequent cycles. Large //quick_refine// values aggressively removes parameters and convergence to low _{{{techref_files:image002.gif?20x23}}} maybe hindered. A value of 0.1 works well. //quick_refine// has the following consequences: * If parameters are not reinstated using //quick_refine_remove// then_{{{techref_files:image002.gif?20x23}}} does not get to its lowest possible value for a particular refinement cycle.  * The degree of parameter randomization increases with increasing values of //quick_refine//. Thus randomization should be reduced as //quick_refine// increases. Alternatively //randomize_on_errros// can be used which automatically determines the amount a parameter is randomized. //quick_refine_remove//removes a parameter from refinement if it evaluates to non-zero or reinstates a parameter if it evaluates to zero. It can be a function of the reserved parameters QR_Removed or QR_Num_Times_Consecutively_Small and additionally global reserved parameter names such as Cycle_Iter, Cycle and T. If //quick_refine_remove// is not defined then the removal scheme of section 5.6 is used and parameters are not reinstated until the next refinement cycle. In most refinements the following will produce close to the lowest _{{{techref_files:image002.gif?20x23}}} and in a shorter time period (see for example PAWLEY1.INP). quick_refine .1    quick_refine_remove =       IF QR_Removed THEN          0 ' reinstate the parameter       ELSE          IF QR_Num_Times_Consecutively_Small > 2 THEN             1 ' remove the parameter          ELSE             0 ' dont remove the parameter          ENDIF       ENDIF;