发货地址:北京海淀
信息编号:203084165,公司编号:14832749
产品规格:不限
产品数量:9999.00 套
包装说明:不限
产品单价:面议
官方网址:http://turntech8843.b2b168.com/
科学软件网提供的软件覆盖各个学科,软件数量达1000余款,满足各高校和企事业单位的科研需求。此外,科学软件网还提供软件培训和研讨会服务,目前视频课程达68门,涵盖34款软件。
GAMS专注于其核心竞争力:让用户创建可读性、可维护的模型,用好的求解方法解决任何问题。开放的体系结构
和多个数据接口允许与外部系统无缝通信。
模型、求解器、数据、平台和用户界面立层,便于切换求解器、使用多个数据集、在多个平台运行以及将GAMS
整合到现有的应用、结构和工作流中去。
面向对象的GAMA API允许GAMS无缝整合到为交互提供适当类别的应用中。这三个面向对象GAMS API是.NET, Java
和Python与.NET framework 4 (Visual Studio 2010)、Java SE 5或更高版本以及Python 3.4, 2.7和2.6。
除了面向对象的GAMA API,还有级别(或级别) 的GAMS API,它们的使用要求有高深知识的GAMS组件库。
除了API, GAMS还提供智能链接到应用程序,如MS Excel, MatLab或R。用户可以在这个环境中继续工作,通过一个
API就可以访问GAMS所有的优化功能。这就允许应用中的模型数据和结果可以可视化和分析了。
GAMS Summation (and Product) Notation
Before going into equation definition we describe the summation notation in GAMS. Remember that GAMS is designed for
standard keyboards and line-by-line input readers, so it is not possible (nor would it be convenient for the user) to employ the
standard mathematical notation for summations.
The summation notation in GAMS can be used for simple and complex expressions. The format is based on the idea of always
thinking of a summation as an operator with two arguments: Sum(index of summation, summand) A comma separates
the two arguments, and if the first argument requires a comma then it should be in parentheses. The second argument can be
any mathematical expression including another summation.
As a simple example, the transportation problem contains the expression
Data Entry by Tables
Optimization practitioners have noticed for some time that many of the input data for a large model are derived from relatively
small tables of numbers. Thus, it is very useful to have the table format for data entry. An example of a two-dimensional
table (or matrix) is provided in the transportation model:
Table d(i,j) distance in thousands of miles
new-york chicago topeka
seattle 2.5 1.7 1.8
san-diego 2.5 1.8 1.4 ;
科学软件网专注提供正版软件,跟上百家软件开发商有紧密合作,价格优惠,的和培训服务。