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JaCoP - Java Constraint Programming solver
JaCoP 4.2 PDF Print E-mail
Written by Krzysztof Kuchcinski   
Monday, 15 December 2014 09:56
Dear users,

JaCoP 4.2 has been released. Feel free to download a compiled version from http://sourceforge.net/projects/jacop-solver/ or to clone JaCoP repository from https://github.com/radsz/jacop  and contribute.

This release contains several new features and improvements. First, this version is compatible with newly released minizinc 2.0. Please, use the new JaCoP minizinc library from directory src/main/minizinc/org/jacop/minizinc/ when compiling minizinc files. It offers newly introduced, in minizinc, global constraints knapsack, network_flow and geost. We have also developed a flatzinc loader that makes it possible to load flatzinc models and then use the created model in Java. 

The new search method, SGMPCS search, has been added to the solver . It is based on the original work by J. C. Beck and presented in the paper entitled "Solution-Guided Multi-Point Constructive Search for Job Shop Scheduling". 

Directory org.jacop.examples.flatzinc contains examples of applications for flatzinc loader, SGMPCS search and minimization method for floating point problems.

This release fixes also few bugs and makes improvements in several parts of the solver.

Best regards,
JaCoP Core Developer Team


Last Updated on Monday, 15 December 2014 10:07
 
JaCoP 4.1 PDF Print E-mail
Written by Radoslaw Szymanek   
Sunday, 18 May 2014 20:00
Dear users,

We have just released JaCoP 4.1. Feel free to clone JaCoP repository - https://github.com/radsz/jacop and contribute. In this release we introduce floating-point variables (FloatVar) and constraints on these variables. The methods used in floating point domain of JaCoP are based on floating point intervals and consistency methods build around them. We provide a set of basic arithmetic constraints as well as square root, absolute value, trigonometric constraints (sin, cos,tan, asin, acos, atan), exponential constraint and natural logarithm. Moreover element constraint and equation between integer and float variables makes it possible to build models that mix different JaCoP variables. We have also included experimental implementation of several features that is not consider as final and can change in future.

The floating point domain is fully integrated with JaCoP solver. The same search methods can be used as well as floating point variables can be used as cost functions for minimization. We provide also specialized optimization methods that are specially developed for floating point variables.

The released version provides also flatzinc interpreter for floating point variables. Minizinc models containing float variables can be compiled using standard mzn2fzn compiler and used by JaCoP solver.

This release fixes also few bugs.

Best regards,
JaCoP Core Developer Team
 
AMPL Driver for JaCoP PDF Print E-mail
Written by Radoslaw Szymanek   
Friday, 16 August 2013 09:02

Dear all, 

We are happy to announce that Victor Zverovich from AMPL has created a driver that allows to use JaCoP from AMPL. As most AMPL drivers, the jacop driver is open source. This driver is available from the AMPL repository on GitHub: https://github.com/vitaut/ampl/tree/master/solvers/jacop .

Feel free to check this driver and contribute in any manner possible. It is said to be fairly complete and implementing all of the AMPL constraint programming extensions and a set of options.

We would like to thank Victor and AMPL for their work.

best regards,

JaCoP core developer team 

 
JaCoP 4.0.0.RC1 on Github PDF Print E-mail
Written by Radoslaw Szymanek   
Friday, 16 August 2013 09:02

Dear all, 

We decided to move the source code for the newest version of JaCoP (4.0.0.RC1) to Github. We are happy users of Git and Github is an obvious choice. Feel free to clone JaCoP repository - https://github.com/radsz/jacop and contribute. The changes within the newest JaCoP 4.0.0.RC1 are published here.

best regards,

JaCoP core developer team 

Last Updated on Monday, 02 December 2013 18:27
 
JaCoP version 3.2 released PDF Print E-mail
Written by Krzysztof Kuchcinski   
Monday, 16 April 2012 07:25

Dear users,

We have just released JaCoP 3.2. This is a release that fixes few bugs as well as provides an interface from Scala to JaCoP. Examples using Scala are provided in ExamplesScala package.

Hakan Kjellrstand at his blog discusses Scala wrapper for JaCoP as well as provides additional examples at his repository of Scala examples

best regards,

Core Developer Team

Last Updated on Monday, 16 April 2012 18:32
 
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