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GAMS是用于高级数学建模，编程和优化这些解决方案的软件应用程序。该软件能够解决各种线性，非线性问题。该软件可帮助用户从不同角度和高层次角度探索和解决复杂问题。此应用程序对于大型和高级问题以及复杂的域问题特别有用。可以为各种主机平台配置和设置GAMS，包括个人计算机，工作站，大型机和超级计算机。在该程序中，需要从不同角度解决的复杂和多方面问题可以非常精确地建模，并且用户能够在不同部分修改建模公式以查看变化。可以从一种解决方案切换到另一种解决方案，甚至可以将线性问题转换为非线性问 凭借它提供的众多功能，它可以帮助用户专注于对问题进行建模。GAMS 28是高级数学建模的强大应用程序，提供各种建模，编程，优化和各种其他强大功能。它提供了用户友好的界面，具有各种自定义和设置，使用户可以方便地处理线性和非线性问题，并轻松解决复杂问题。它提供了更好的性能，并允许用户解决各种问题。 该应用程序可以设置为各种主机平台，并包括对个人计算机，大型机，工作站和超级计算机的支持。处理多方面的问题，并允许用户处理不同的观点，并提供精确的解决方案，以及使用公式建模不同的部分。将线性问题转换为非线性问题并与模型进行通信。它提供智能内存管理功能，并支持分析问题。简而言之，它是高级数学建模和编程的完整解决方案。 一些GAMS功能：GAMS通过自动执行各种任务（如内存管理，处理，存储，输出输入和工作流控制），帮助用户不必担心控制这些问题，并且有更多机会对问题进行建模和分析并评估结果。GSAM编程语言与许多其他编程语言类似，熟悉其中一种编程语言的人很容易与之通信。用这种语言编写的代码很容易记录，并且可以编码并提供各种解释，以便以后可以理解代码。GAMS软件提供的解决方案完全可移植，一旦完成，最终的解决方案可以轻松地从一个系统转移到另一个系统。系统要求Windows XP / 7 / 8.1 / 10 安装指南如果是32位版本，请启动软件安装，并在请求许可证时输入gamslice.txt文件并完成安装;破解的64位版本25.1.3和版本28.2.0但没有完整;破解25.1.3非常适合全尺寸解算器，但输出不准确。在破解版本28.2.0中，一些解算器也已满但未完成。 Activate Program: 1-Install Program 2-Copy serial.txt and Activator.exe in installation path (C:\GAMS\win64\28.2) 3-Run Activator.exe as administrator and select method 1 (a) 4-Now run gamside-loader.exe > File > Options > License Tab > Select gamslice.txt Disable License Check : 0-MAKE SURE YOU ACTIVE PROGRAM FIRST 1-Copy mpsgeval.dll and lsocclib64.dll and test.bat in installation path 2-Block The Program Internet Access With FireWall 3-Now Just Run test.bat 购买后，将显示帖子中所有出售内容。
若发现会员采用欺骗的方法获取财富,请立刻举报,我们会对会员处以2-N倍的罚金,严重者封掉ID! 此段为出售的内容，购买后显示 更新介绍 28.1.0 Major release (August 02, 2019) 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 Johan Löfberg, Hans Mittelmann, and José Luis Vilar Zanón. Platforms - We plan to drop support for Mac OS X 10.12 (Sierra) with the next GAMS major release.
GAMS System GAMS - Added new dollar control option $scratchFileName.
- Fixed a bug which caused a problem when unloading a multi-dimensional Alias at compile-time.
Documentation - Improved ranking of results in offline search by minimizing the effect of the length of a document on the importance of a search term in that document.
- When searching the index, only relevant results are shown for subcategories as well.
- The full-text search now shows also results for a search in the index.
Solvers ANTIGONE, Bonmin, Couenne, Ipopt, SCIP - Downgraded Intel MKL libraries to version 2018.3 on Windows 64-bit.
ANTIGONE - The timelimit is now applied to the wallclock time and wallclock time is reported in the log and back to GAMS.
BARON - New libraries 19.7.13.New relaxations and branching rules for nonconvex mixed-integer quadratic programs, leading to significant speedups for this class of problems.
- Increased robustness in various range reduction routines.
- Increased solvability of large-scale problems by BARON's cut generators.
- Enhanced convexity recognition routines.
- Updated to IPOPT 3.12.13 and CBC 2.10.1.
Fixed passing constant equations to BARON. CBC - Revised solver options.Updated the documentation and possible values for many options, bringing them closer to the original Cbc option names and values.
- The following options changed their type from boolean to string: crossover, cutoffConstraint, combineSolutions, Dins, DivingRandom, DivingCoefficient, DivingFractional, DivingGuided, DivingLineSearch, DivingPseudoCost, DivingVectorLength, feaspump, naiveHeuristics, pivotAndFix, randomizedRounding, Rens, Rins, roundingHeuristic, proximitySearch, presolve
- For options dualPivot, primalPivot, and scaling value "auto" has been renamed to "automatic".
- For option costStrategy, values "binaryfirst" and "binarylast" have been renamed to "01first" and "01last", respectively.
- The following options have been added: factorization, denseThreshold, smallFactorization, sparseFactor, biasLU, psi, substitution, primalWeight, autoScale, bscale, gamma, KKT, expensiveStrong, OrbitalBranching, infeasibilityWeight, fixOnDj, sosPrioritize, cutLength, lagomoryCuts, latwomirCuts, hOptions, combine2Solutions, diveSolves, feaspump_artcost, feaspump_fracbab, feaspump_cutoff, feaspump_increment, dwHeuristic, pivotAndComplement, VndVariableNeighborhoodSearch
CONOPT - CONOPT3 accepts models with empty rows. The GAMS/CONOPT3 link sets the hidden option LSAZRW to true.
Convert - Replaced the OSiL writer. The new writer supports more GAMS intrinsic functions and produces slightly smaller OSiL files with more compact expression trees.
IPOPT - Fixed handling of Ipopt's feasible-point-found status.
LocalSolver MOSEK - New libraries 9.0.98.Introduced the power and exponential cones, see also Conic Programming.
- As announced, the optimizer for general convex nonlinear problems has been removed. Thus, solving a NLP, DNLP, MINLP, or RMINLP for which a conic reformulation is not recognized will now result in a missing capability solver status with GAMS/Mosek.
- Improved presolve for particular conic problems.
- Tighten the stopping criteria when solving conic optimization problems: Changed default of MSK_DPAR_INTPNT_CO_TOL_INFEAS from 1e-10 to 1e-12, of MSK_DPAR_INTPNT_CO_TOL_REL_GAP from 1e-7 to 1e-8, and of MSK_DPAR_INTPNT_QO_TOL_INFEAS from 1e-10 to 1e-12. However, note that one can let Mosek relax feasibility and optimality tolerances if it cannot make sufficient progress, see MSK_DPAR_INTPNT_CO_TOL_NEAR_REL and MSK_DPAR_INTPNT_QO_TOL_NEAR_REL.
- Changed scaling of interior-point optimizer so better accuracy is obtained in some cases.
- Introduced an outer approximation method for solving conic mixed integer optimization problems. This can be enabled with the parameter MSK_IPAR_MIO_CONIC_OUTER_APPROXIMATION.
- Much improved performance on recent AMD CPUs. For linear algebra, the BLIS library is employed when run on AMD CPUs.
- Better performance on CPUs that support AVX-512 instructions.
- Removed parameters: MSK_DPAR_DATA_TOL_AIJ, MSK_DPAR_INTPNT_NL_*, MSK_DPAR_MIO_DISABLE_TERM_TIME, MSK_DPAR_MIO_NEAR_TOL_ABS_GAP, MSK_DPAR_MIO_NEAR_TOL_REL_GAP, MSK_IPAR_MIO_CONSTRUCT_SOL and synonym "mipstart" (GAMS now always passes the starting point of a MIP to Mosek), MSK_IPAR_OPF_MAX_TERMS_PER_LINE, MSK_IPAR_WRITE_DATA_FORMAT
- Further new parameters: MSK_IPAR_PRESOLVE_MAX_NUM_PASS, MSK_IPAR_PRESOLVE_MAX_NUM_PASS, MSK_IPAR_SIM_SEED, MSK_IPAR_INTPNT_ORDER_GP_NUM_SEEDS, MSK_IPAR_MIO_MAX_NUM_ROOT_CUT_ROUNDS, MSK_IPAR_MIO_PROPAGATE_OBJECTIVE_CONSTRAINT, MSK_IPAR_MIO_SEED, MSK_IPAR_MIO_FEASPUMP_LEVEL, MSK_IPAR_WRITE_COMPRESSION, MSK_IPAR_OPF_WRITE_LINE_LENGTH, MSK_IPAR_PTF_WRITE_TRANSFORM
- Changed default of MSK_DPAR_MIO_TOL_ABS_GAP from 0 to value of GAMS option OptCA (was used for MSK_DPAR_MIO_NEAR_TOL_ABS_GAP before) and of MSK_DPAR_MIO_TOL_REL_GAP from 0 to value of GAMS option OptCR (was used for MSK_DPAR_MIO_NEAR_TOL_REL_GAP before).
Fixed handling of Mosek certificiates for primal and dual infeasibility, see Infeasible/Unbounded Models. SCIP - New libraries 6.0 (f79421d).
Tools GAMS Studio - New version 0.12.3.Stability and performance improvements.
- Added GAMS Solver Option Editor to view and edit a solver-specific option file.
- Renamed Option Editor to Parameter Editor to better distinguish solver options and GAMS parameters.
- Added menu entry GAMS -> Delete scratch directories to delete all scratch directories in current working directory. A similar dialog will also be triggered if GAMS returns 110 ("Too many scratch directories").
- Added file associations and icons for .gms and .gdx files on Mac OS X.
- Changed shortcut to focus Main widget from Ctrl+H to CTRL+E (there was a collision on Mac OS X).
- Improved keyboard navigation between files and widgets.
We plan to drop Studio for 32 bit Windows with the next major release. APIs - As announced, dropped support for Python 2.6.
- We plan to increase the minimum version requirement of the Java Runtime Environment to Java SE 8 with the next major release.
Model Libraries GAMS Model Library - Changed model sigma in immun to minimize standard-deviation instead of variance.
- Added missing nonnegativity requirement on variables in model wall.
28.2.0 Minor release (August 19, 2019) 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 Nayeem Chowdhury, Salvador Doménech Martínez, Michael Ferris, Antti Lehtila, Evangelos Panos, Jochen Uhrich, and Alexey Ziuzin. GAMS System GAMS - Setting $onMultiR allows the redefinition of macros as well now.
- Fixed a problem finding the Python interpreter, that comes with GAMS, in certain cases.
- Fixed a bug in the model generation, which could have caused a crash or wrong results in some cases.
Solvers CPLEXD - Corrected reporting of solution for (MI)QCP problems when using feasopt.
- CplexD now reports the objective of the feasible relaxation in the solution summary when using feasopt.
Tools GAMS Studio - New version 0.12.4Stability and performance improvements.
- Improved robustness of glb file parser (see User Libraries).
- Added "What's new" menu entry to show latest changes of Studio.
Object Oriented APIs - Fixed a problem, where GAMSDatabase.Export triggered an exception because of domain violations, even if only relaxed domains were used.
Java - Added new method GAMSSymbolRecord.dispose() for on-demand release of external resources hold by non-java library.
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