The MOSEK Python optimizer API manual Version 7.0 (Revision 141)

Optimizer API for Python - Documentation - Mosek Optimizer API for Python - Documentation - Mosek

25.11.2015 Views

456 APPENDIX B. PARAMETERS GUB cover +2 Flow cover +4 Lifting +8 Plant location +16 Disaggregation +32 Knapsack cover +64 Lattice +128 Gomory +256 Coefficient reduction +512 GCD +1024 Obj. integrality +2048 Possible Values: Any value. Default value: -1 B.2.78 iparam.mio cut level tree Corresponding constant: iparam.mio cut level tree Description: Controls the cut level employed by the mixed-integer optimizer at the tree. See iparam.mio cut level root for an explanation of the parameter values. Possible Values: Any value. Default value: -1 B.2.79 iparam.mio feaspump level Corresponding constant: iparam.mio feaspump level Description: Feasibility pump is a heuristic designed to compute an initial feasible solution. A value of 0 implies that the feasibility pump heuristic is not used. A value of -1 implies that the mixedinteger optimizer decides how the feasibility pump heuristic is used. A larger value than 1 implies that the feasibility pump is employed more aggressively. Normally a value beyond 3 is not worthwhile.

B.2. IPARAM: INTEGER PARAMETERS 457 Possible Values: Any number between -inf and 3. Default value: -1 B.2.80 iparam.mio heuristic level Corresponding constant: iparam.mio heuristic level Description: Controls the heuristic employed by the mixed-integer optimizer to locate an initial good integer feasible solution. A value of zero means the heuristic is not used at all. A larger value than 0 means that a gradually more sophisticated heuristic is used which is computationally more expensive. A negative value implies that the optimizer chooses the heuristic. Normally a value around 3 to 5 should be optimal. Possible Values: Any value. Default value: -1 B.2.81 iparam.mio hotstart Corresponding constant: iparam.mio hotstart Description: Controls whether the integer optimizer is hot-started. Possible values: • onoffkey.off Switch the option off. • onoffkey.on Switch the option on. Default value: onoffkey.on

456 APPENDIX B. PARAMETERS<br />

GUB cover +2<br />

Flow cover +4<br />

Lifting +8<br />

Plant location +16<br />

Disaggregation +32<br />

Knapsack cover +64<br />

Lattice +128<br />

Gomory +256<br />

Coefficient reduction +512<br />

GCD +1024<br />

Obj. integrality +2048<br />

Possible Values:<br />

Any value.<br />

Default value:<br />

-1<br />

B.2.78<br />

iparam.mio cut level tree<br />

Corresponding constant:<br />

iparam.mio cut level tree<br />

Description:<br />

Controls the cut level employed by the mixed-integer <strong>optimizer</strong> at the tree. See iparam.mio cut level root<br />

for an explanation of the parameter values.<br />

Possible Values:<br />

Any value.<br />

Default value:<br />

-1<br />

B.2.79<br />

iparam.mio feaspump level<br />

Corresponding constant:<br />

iparam.mio feaspump level<br />

Description:<br />

Feasibility pump is a heuristic designed to compute an initial feasible solution. A value of 0<br />

implies that the feasibility pump heuristic is not used. A value of -1 implies that the mixedinteger<br />

<strong>optimizer</strong> decides how the feasibility pump heuristic is used. A larger value than 1<br />

implies that the feasibility pump is employed more aggressively. Normally a value beyond 3 is<br />

not worthwhile.

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