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7 Dec 2003 Keywords: mixed-integer programming, semi-continuous variables, disjunctive program- For example, in a basic solution to the LP relaxation, number of CPLEX cuts generated for the MIP approach, while the column
ILOG CPLEX is a tool for solving linear optimization problems, commonly referred constructs like Special Ordered Sets (SOS) and semi-continuous variables.
However, you can designate a semi-continuous variable as integer (type ILOINT ). In that case, it is a semi-integer variable. For details about the feasible region of a semi-continuous or semi-integer variable, see the documentation of IloSemiContVar in the CPLEX C++ API Reference Manual.
Semi-continuous variables are variables that must take a value between their For example in a blending problem this could mean if an amount of a raw
set with variable upper bounds as a relaxation of general semi-continuous net- work flow . There are many examples of integer programs for which the convex hull of its fea- sible region is . such as CPLEX and may be solved efficiently.20 Mar 2011 AMPL allows you to define a semicontinuous variable without explicitly with the semi-cont approach in CPLEX on some practical examples.
31 Aug 2016 Semi-continuous variables are often used in situations where we don’t like to A standard example is a portfolio optimization problem where many small . issue with Cplex on a small model with semi-continuous variables:
15 Sep 2013 Semi-continuous variables are often encountered in real-world modeling such The new version of CPLEX (12.x) has setup a variable type for.
Using Semi-Continuous Variables: a Rates Example What Are Semi-Continuous Variables? NET API of ILOG CPLEX, then you will also find the C#.
If you need a semi-continuous integer, you can change the type of f to represent an integer. Using OPL interfaces you can create a semi-continuous variable from Concert and directly add that variable to the OPL model. The underlying CPLEX optimizer will accept the semi-continuous variable and solve the updated model.

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