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GAMS 23.4 发布！ (下载最新试用版) 
20100530
广州博脉 
GAMS (General Algebraic Modeling System) 是一个用于数学规划问题的高级建模系统。它包括一个语言编译器和一套集成的高性能求解器。GAMS 是为复杂的、大型的建模应用度身订造的。它允许你创建能快速适应新情况的大型可维护模型... w_w_w__._pom_in__e_.__c__o__m__ GAMS 详细介绍，请点击：http://www.pomine.com/show_software.aspx?pName=GAMS w_w_w.pomi_n_e.__co__m__ 需要下载试用，请填写 产品咨询表 w_w__w_.po_m_i_n__e._c_o_m GAMS 23.3 的新特性： w_ww__.__po_m_in_e__.__co__m_ GAMS Distribution 23.4 May 24, 2010 w__w_w__.__po_mi_n__e_._c_o_m__ Acknowledgments Platforms AIX Mac PowerPC GAMS System GAMS APIs Data Utilities EMP IDE Libinclude Solvers BARON CoinOR CPLEX GUROBI LINDOGLOBAL MOSEK XPRESS Incore communication solver links Model Libraries GAMS Data Library GAMS EMP Library GAMS Model Library GAMS Test Library Solver/Platform Availability Matrix Acknowledgments We would like to thank all of our users who have reported problems and made suggestions for improving this release. In particular, we thank Phil Bishop, Stefan Boeters, Pavel Borisovski, Wolfgang Britz, Michael Ferris, David Grace, Sascha Herrmann, Alexander Mitsos, Sebastian Ritter, and Tom Rutherford. We also thank Marcel Roelofs for helpful and insightful comments and discussions on Hessian computations. ww_w_.__p_o__m_i_n_e_.co_m__ Platforms AIX Now built on AIX 5.3 64 bit New AIX system no longer supports the following products BARON, CONOPT2, DECIS, OSL3, OSLSE, SCENRED, SCENRED2, and XA Mac PowerPC Dropped support of the Macintosh PowerPC GAMS System. Version 23.3 and older are still available for download GAMS System GAMS GridScript The GAMS parameter gridscript allows to point to a customized grid submission script. www_.__p_om_i__ne_.__c_o_m__ TryLinear GAMS checks a model for nonlinearities at compile time and requires the user to specify using nlp in the solve statement. At run time these nonlinearities might disappear (cancelation, multiplication of nonlinear terms with 0, ?), but the using nlp prevented the use of a pure LP solver. The new model attribute .TryLinear = 1 checks at run time whether a nonlinear model has any nonlinearities and then calls the default/chosen solver for the resulting model type. ww__w_.__p_o_m_i__n_e._co__m Depending on the original model type the resulting model type is: w_w_w.pom_i_n_e_.co_m_ QCP/DNLP/NLP > LP MIQCP/MINLP > MIP RMIQCP/RMINLP > RMIP An example was added to the Test Library: trylin01 (482) w_w_w_.__p_o__m_i_n_e__._co_m_ Compile Time String Comparison A compile time equivalent of the sameas function was added. E.g. w__w_w__.__p_o_m_i_ne_._c_o__m__ $eval a sameas(xyz,xYz) $eval b sameas ( 'xyz' , ?xyz? ) $eval c sameas (123,123) $eval d sameas (123,134) $log %a% %b% %c% %d% w_w_w_.__p__o__mi_n__e_.com__ will yield: w__ww._po_m_in__e._co_m 1 1 1 0 Compile Time Constants For various GAMS options compile time constants were added in order to ease the reading code if used. w_w__w_.__p_omin__e__.c_om_ solprint: 0 %Solprint.Summary% 1 %Solprint.Report% 2 %Solprint.Quiet% handlestatus: 0 %Handlestatus.Unknown% 1 %Handlestatus.Running% 2 %Handlestatus.Ready% 3 %Handlestatus.Failure% solvelink: 0 %Solvelink.ChainScript% 1 %Solvelink.CallScript% 2 %Solvelink.CallModule% 3 %Solvelink.AsyncGrid% 4 %Solvelink.AsyncSimulate% 5 %Solvelink.LoadLibrary% solvestat: 1 %Solvestat.Normal Completion% 2 %Solvestat.Iteration Interrupt% 3 %Solvestat.Resource Interrupt% 4 %Solvestat.Terminated By Solver% 5 %Solvestat.Evaluation Interrupt% 6 %Solvestat.Capability Problems% 7 %Solvestat.Licensing Problems% 8 %Solvestat.User Interrupt% 9 %Solvestat.Setup Failure% 10 %Solvestat.Solver Failure% 11 %Solvestat.Internal Solver Failure% 12 %Solvestat.Solve Processing Skipped% 13 %Solvestat.System Failure% modelstat: 1 %ModelStat.Optimal% 2 %ModelStat.Locally Optimal% 3 %ModelStat.Unbounded% 4 %ModelStat.Infeasible% 5 %ModelStat.Locally Infeasible% 6 %ModelStat.Intermediate Infeasible% 7 %ModelStat.Intermediate Nonoptimal% 8 %ModelStat.Integer Solution% 9 %ModelStat.Intermediate NonInteger% 10 %ModelStat.Integer Infeasible% 11 %ModelStat.Licensing Problems% 12 %ModelStat.Error Unknown% 13 %ModelStat.Error No Solution% 14 %ModelStat.No Solution Returned% 15 %ModelStat.Solved Unique% 16 %ModelStat.Solved% 17 %ModelStat.Solved Singular% 18 %ModelStat.Unbounded  No Solution% 19 %ModelStat.Infeasible  No Solution% E.g. the statments following are the same w_w__w_.po_m__i_n__e_._co__m_ modelname.solvelink=3; modelname.solprint=0; modelname.solvelink=%solvelink.AsyncGrid%; modelname.solprint=%solprint.Summary%; The GAMS model libraries were adjusted and now make use of these constants. w_w__w_.p__o__m_i__n__e__.__c_om APIs new C# example using GDX API: apifiles\examples\example1.cs added C++, C# and VB.net project files to make it easier to compile the examples in Visual Studio added Delphi Option and Project Configuration Files to make it easier to compile the examples in the Delphi IDE and on the command line added Java Native Interface libraries apifiles\common: dropped file gamsglobals.h, use gclgms.h instead GDXDCLIB API New entry points: ww_w_.p_omin__e._c_o_m__ gdxOpenAppend To add symbols to an existing GDX container gdxDataReadRawFast To read data in raw mode using a callback function Data Utilities GDX2ACCESS gdx2access now supports saving the text associated with set entries in the database. Added parameter to indicate which version of the database should be created (.mdb or .accdb) GDXXRW gdxxrw now supports writing an Excel file with filters. Filtering can be switched on/off for the symbols that follow the filter option: execute 'gdxxrw.exe test.gdx par=A rdim=3 cdim=0 rng=sheet1!a1 filter=1 par=B rdim=3 cdim=0 rng=sheet2!a1'; Added options to write texts and hyperlinks to a spreadsheet. MDB2GMS mdb2gms now supports writing of the text associated with set entries. SQL2GMS sql2gms now supports writing of the text associated with set entries. EMP A new model type EMP was added in order to provide the flexibility required for the extended mathematical programming framework. The former solver EMP was renamed to JAMS to avoid confusion. JAMS is the default solver for EMP models. EMP bilevel programming now supports Variational Inequality (VI) followers in addition to maximization/minimization followers. Example: multmpec (25) EMP now supports equilibrium models. In contrast to bilevel programs these agentbased systems don't require a leader. Example: transeql (45) Lots of EMP models were added to the GAMS EMP Library. IDE Fixed bug with writing a symbol with many elements to a spreadsheet Opening many .lst files is faster Libinclude McCarl's put_toexcel and put_tohtml were added to inclib subdirectory of the GAMS system directory and therefore can be used using $libinclude. These tools allow greater control when writing multi dimensional symbols to Excel or HTML files. More information can be found here Solvers BARON New Libraries 9.0.5 Native 64bit Baron libraries in 64bit windows and linux system New option ExtNLPsolver allows to call any GAMS NLP Solver available Dropped support of Baron on platform AIX CoinOR Renaming of solver links as follows COINBONMIN > BONMIN COINCBC > CBC COINCOUENNE > COUENNE COINGLPK > GLPK COINIPOPT > IPOPT COINOS > OS COINSCIP > SCIP of bare bone solver links as follows COINCPLEX > OSICPLEX COINGUROBI > OSIGUROBI COINMOSEK > OSIMOSEK COINXPRESS > OSIXPRESS For convenience of our users we keep the old names as aliases to the new names for the next distribution. Note: The temporary names COINBONMIND, COINCBCD, and COINIPOPTD are not available anymore New libraries CBC 2.4 Bonmin 1.3 Couenne 0.3 Ipopt 3.8 GLPK 4.43 Mumps 4.9 (used by Ipopt and Bonmin) OS 2.1 The new BONMIN version brings various new MINLP heuristics (Feasibility pump, diving based heuristics, RINS, local branching). BONMIN can now use CPLEX as solver for subMIPs, see option milp_solver SCIP now supports convex and nonconvex quadratic constraints (model types QCP, RMIQCP, MIQCP). BCH has temporarily been disabled for CBC, BONMIN, and SCIP. The OS link now supports only remote solvers via an Optimization Services Server. Native CSDP executables were added to the 64bit Windows and Linux system. CPLEX Updated threads option allows specification of cores left free for nonCPLEX work GUROBI New libraries GUROBI 3.0 New parallel barrier solver New MIP features include symmetry handling, improved and additional cutting planes, and additional heuristics. Alternate MIP solutions: retrieve all of the feasible solutions found during the branchandcut search New parameters AggFill: provides finergrain control of presolve aggregation. BarConvTol: barrier convergence tolerance. BarCorrectors: controls central corrections in barrier. BarIterLimit: limits the number of barrier iterations. BarOrder: controls the fillreducing ordering in barrier. PreDepRow: controls the presolve dependent row reduction. Crossover: controls barrier crossover. CrossoverBasis: controls the generation of the initial crossover basis. MIPFocus: allows you to modify the MIP solution strategy to better suit the needs of different model types. MIPGapAbs: absolute MIP termination tolerance (GAMS OptCA) NetworkCuts: controls the generation of network cutting planes. PreDual: determines whether presolve should form the dual of the input model. PrePasses: controls the number of passes performed by presolve. PumpPasses: controls the feasibility pump heuristic. RINS: controls the RINS heuristic. Symmetry: controls the new MIP symmetry handling. SubMIPCuts: controls the generation of subMIP cutting planes. Threads: allows specification of how many cores to use. LINDOGLOBAL New libraries Lindo 6.0.1.406 Now also available on Solaris on x64 Significant improved performance with some models when Mosek is licensed as well MOSEK New libraries MOSEK 6 rev 71 XPRESS New libraries XPRESS 20.00 Incore communication solver links All CoinOR solvers are now supported as incore communication solvers. Model Libraries GAMS Data Library tsvngdx (75): Support GDX Files with TortoiseSVN diff GAMS EMP Library jointc1 (22): Educational bilevel model jointc2 (23): Educational bilevel model ferris43 (24): Educational embedded complementarity system model multmpec (25): Educational bilevel model with VI followers transbp (26): Transportation model with variable demand function using bilevel programming flds911 (27): Princeton Bilevel Optimization Example 9.1.1 flds912 (28): Princeton Bilevel Optimization Example 9.1.2 flds913 (29): Princeton Bilevel Optimization Example 9.1.3 flds914 (30): Princeton Bilevel Optimization Example 9.1.4 flds915 (31): Princeton Bilevel Optimization Example 9.1.5 flds916 (32): Princeton Bilevel Optimization Example 9.1.6 flds917 (33): Princeton Bilevel Optimization Example 9.1.7 flds918 (34): Princeton Bilevel Optimization Example 9.1.8 flds919 (35): Princeton Bilevel Optimization Example 9.1.9 flds921 (36): Princeton Bilevel Optimization Example 9.2.1 flds922 (37): Princeton Bilevel Optimization Example 9.2.2 flds923 (38): Princeton Bilevel Optimization Example 9.2.3 flds924 (39): Princeton Bilevel Optimization Example 9.2.4 flds925 (40): Princeton Bilevel Optimization Example 9.2.5 flds926 (41): Princeton Bilevel Optimization Example 9.2.6 flds927 (42): Princeton Bilevel Optimization Example 9.2.7 flds928 (43): Princeton Bilevel Optimization Example 9.2.8 flds929 (44): Princeton Bilevel Optimization Example 9.2.9 transeql (45): Transportation model as equilibrium problem simplevi (46): Simple Variational Inequality simplevi2 (47): Simple Nonlinear Variational Inequality affinevi (48): Affine Variational Inequality simpequil (49): Simple Equilibrium GAMS Model Library trnspwl (351) : A Transportation Problem with discretized economies of scale food (352) : Food Manufacturing Problem  Blending of oils GAMS Test Library examin04 (464) : EXAMINER test suite  test returnGamsPoint option and QCP empbp04 (465) : Bilevel model with and without explicitly defined objective equation empbp05 (466) : Bilevel model with MIN follower vs. VI follower eval05 (467) : constant expression test for ceil,floor,trunc,frac eval06 (468) : matching operators in a column spec emp06 (469) : Test of EMP based on trnsport model emp07 (470) : Test of EMP based on trnsport model emp08 (471) : Test of EMP based on trnsport model pgams01 (472) : Test procdir deletion in pgams pgams02 (473) : Test procdir deletion in pgams tabsubst (474) : Tab and string substitution for long line eval07 (475) : Test evaluation of real constants  string2Double conversion dumpsol (476) : Gurobi Alternate Solutions for a Simple Facility Location Problem ifthen5 (477) : $ifthen false without sameline ifthen6 (478) : $ifthen/elseif false without sameline utils02 (479) : test MPS2GMS  it had range problems utils03 (480) : test MPS2GMS for reading the second range entry on a line mpsge11 (481) : MPSGE test  multiple fixed income levels trylin01 (482) : Test model attribute tryLinear 



