使用期限永久
许可形式单机和网络版
原产地美国
介质下载
适用平台windows,linux
科学软件网专注提供科研软件。截止目前,共代理千余款,软件涵盖各个学科。除了软件,科学软件网还提供课程,包含34款软件,66门课程。热门软件有:spsspro,stata,gams,sas,spss,matlab,mathematica,lingo,hydrus,gms,pscad,mplus,eviews,nvivo,gtap,sequncher,simca等等。
A scalar is regarded as a parameter that has no domain. It can be declared and assigned with a Scalar statement
containing a degenerate list of only one value, as in the following statement from the transportation model.
Scalar f freight in dollars per case per thousand miles /90/;
If a parameter's domain has two or more dimensions, it can still have its values entered by the list format. This is very useful
for entering arrays that are sparse (having few non-zeros) and super-sparse (having few distinct non-zeros).
Objective function and constraint equations are first declared by giving them names. Then their general algebraic formulae are described.
User Interface
Portability concerns also have implications for the user interface. The basic GAMS system is file-oriented, and no special
editor or graphical input and output routines exist. Rather than burden the user with having to learn yet another set of editing
commands, GAMS offers an open architecture in which each user can use his word processor or editor of choice. This basic
user interface facilitates the integration of GAMS with a variety of existing and future user environments.
Equations
The power of algebraic modeling languages like GAMS is most apparent in the creation of the equations and inequalities that
comprise the model under construction. This is because whenever a group of equations or inequalities has the same algebraic
structure, all the members of the group are created simultaneously, not individually.
科学软件网不定期举办各类公益培训和讲座,让您有更多机会免费学习和熟悉软件。
http://www.kxrjsoft.com.cn