Nonlinear Optimization Models

The subdirectories below marked "gif" contain graphical 2-D depictions of the optimal solution. Those marked "vrml" have links to 3-D virtual reality models depicting the solutions. And those marked "wav" have audio snippets.

Some models (such as cute/hs06[89].mod and jeffc/antenna/*bessel*.mod) require nonlinear functions that are not included with ampl (such as the error function erf() and some Bessel functions). To run these models you need to download funcadd.c, compile it into a dll called amplfunc.dll, and set the shell environment variable AMPLFUNC to point to the directory containing this dll. Here's a sample makefile for building amplfunc.dll on an SGI machine: makefile.irix. For more information, see https://ampl.com/NEW/libload.html.

• dir: Antenna Array Synthesis (gif)
• dir: Antenna Array Synthesis (Coleman) (vrml)
• dir: Brachistochrone Problem (gif)
• dir: Catenary Problem (gif)
• dir: Cute Set
• dir: Data Envelopment Analysis
• dir: Electrons on a Sphere (gif, vrml)
• dir: Facility Location Points
• dir: FIR filter Design
• dir: FIR Filter Design (Coleman) (gif, wav)
• dir: FIR Filter Design (Wu, Boyd, Vandenberghe)
• dir: Grasping Force Optimization
• dir: Hanging Chain of Springs
• dir: Hang Glider: Range Maximization
• dir: Hock and Schittkowski Suite
• dir: Hock and Schittkowski Suite as revised by Stephan Seidl
• dir: Hydrothermal Power Coordination
• dir: Largest Small Polygon
• dir: Markowitz Models for Portfolio Optimization
• dir: Median
• dir: Minimal Surfaces (gif, vrml)
• dir: Models from Elena Bobrovnikova
• dir: Nonnegative Least Squares
• dir: Power Flow Optimization
• dir: Putting Trajectories
• dir: Principle Component Analysis
• dir: Rocket Fastest Trip (gif)
• dir: Saw Path Tracking
• dir: Schittkowski Suite
• dir: Semidefinite Programming
• dir: Steiner Problems
• dir: Stengel Problems
• dir: Structural Optimization (gif, vrml)
• dir: Traffic Equilibrium
• dir: Trajectory Optimization (gif, vrml)
• tar file: All Cute Models (4.0 Mb)
• tar file: All Non-Cute (Ugly) Models

Most of the models above have been ``ported'' to GAMS by Andre Savitsky (andre_savit@yahoo.com) and posted to the following gamsworld website:
http://www.gamsworld.org/performance/princetonlib/princetonlib.htm.