Now showing items 1-10 of 10

    • Cross-Validation, Support Vector Machines and Slice Models 

      Voelker, Meta; Ferris, Michael (2001)
      We show how to implement the cross-validation technique used in ma- chine learning as a slice model. We describe the formulation in terms of support vector machines and extend the GAMS/DEA interface to allow for e cient ...
    • FATCOP 2.0: Advanced Features in an Opportunistic Mixed Integer Programming Solver 

      Linderoth, Jeff; Ferris, Michael; Chen, Qun (2000)
      We describe FATCOP 2.0, a new parallel mixed integer program solver that works in an opportunistic computing environment provided by the Condor resource management system. We outline changes to the search strategy of ...
    • Interior Point Methods for Massive Support Vector Machines 

      Munson, Todd; Ferris, Michael (2000-05-25)
      We investigate the use of interior point methods for solving quadratic programming problems with a small number of linear constraints where the quadratic term consists of a low-rank update to a positive semi-de nite matrix. ...
    • An optimization approach for radiosurgery treatment planning 

      Shepard, David; Lim, Jinho; Ferris, Michael (2001-11-06)
      We outline a new approach for radiosurgery treatment planning, based on solving a series of optimization problems. We consider a speci c treat- ment planning problem for a specialized device known as the Gamma Knife, ...
    • Optimization of Gamma Knife Radiosurgery 

      Shepard, David; Ferris, Michael (2000)
      The Gamma Knife is a highly specialized treatment unit that pro- vides an advanced stereotactic approach to the treatment of tumors, vascular malformations, and pain disorders within the head. Inside a shielded ...
    • A Practical Approach to Sample-path Simulation Optimization 

      Munson, Todd; Ferris, Michael (2000)
      We propose solving continuous parametric simulation optimizations using a deterministic nonlinear optimiza- tion algorithm and sample-path simulations. The op- timization problem is written in a modeling language with ...
    • Radiosurgery Treatment Planning via Nonlinear Programming 

      Shepard, David; Lim, Jinho; Ferris, Michael (2001-01)
      The Gamma Knife is a highly specialized treatment unit that pro- vides an advanced stereotactic approach to the treatment of tumors, vascular malformations, and pain disorders within the head. Inside a shielded treatment ...
    • Semismooth Support Vector Machines 

      Munson, Todd; Ferris, Michael (2000-11-29)
      The linear support vector machine can be posed as a quadratic pro- gram in a variety of ways. In this paper, we look at a formulation using the two-norm for the misclassi cation error that leads to a positive de - nite ...
    • SIMULATION OPTIMIZATION BASED ON A HETEROGENEOUS COMPUTING ENVIRONMENT 

      Ferris, Michael; Sinapiromsaran, Krung (2001)
      We solve a simulation optimization using a deterministic nonlinear solver based on the sample-path concept. The method used a quadratic model built from a collection of surrounding simulation points. The scheme does not ...
    • Slice Models in General Purpose Modeling Systems 

      Meta, Voelker; Ferris, Michael (2000-12-14)
      Slice models are collections of mathematical programs with the same structure but di erent data. Examples of slice models appear in Data Envelopment Analysis, where they are used to evaluate e ciency, and cross-validation, ...