Results 241 to 250 of about 1,530,542 (289)
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Machine-Learning–Based Column Selection for Column Generation
Transportation Science, 2021Column generation (CG) is widely used for solving large-scale optimization problems. This article presents a new approach based on a machine learning (ML) technique to accelerate CG. This approach, called column selection, applies a learned model to select a subset of the variables (columns) generated at each iteration of CG. The goal is to reduce the
Morabit M., Desaulniers G., Lodi A.
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Polymer News, 2005
Recently, a new material has been showing up in the strangest places. In the news, this new material is reported as being used to “catch a comet by the tail” and it is being seen by the public in Discovery Centers around the country as the least dense material known to man.
Charles E. Carraher, Girish Barot
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Recently, a new material has been showing up in the strangest places. In the news, this new material is reported as being used to “catch a comet by the tail” and it is being seen by the public in Discovery Centers around the country as the least dense material known to man.
Charles E. Carraher, Girish Barot
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Polymer News, 2004
Carbon nanotubes, CNTs, have probably been made in small amounts since the first fires reduced trees and organic material to ashes. It was not until recently, as part of the so-called nano revolution, that we first recognized the existence of these nanotubes. Sumio Iijima, NEC Fundamental Research Laboratory in Japan, first observed carbon nanotubes as
Anna Zhao, Charles Carraher, Jr.
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Carbon nanotubes, CNTs, have probably been made in small amounts since the first fires reduced trees and organic material to ashes. It was not until recently, as part of the so-called nano revolution, that we first recognized the existence of these nanotubes. Sumio Iijima, NEC Fundamental Research Laboratory in Japan, first observed carbon nanotubes as
Anna Zhao, Charles Carraher, Jr.
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Parallel Machine Scheduling by Column Generation [PDF]
Operations Research, 1999 Parallel machine scheduling problems concern the scheduling of njobs on mmachines to minimize some function of the job completion times. If preemption is not allowed, then most problems are not only 𝒩𝒫-hard, but also very hard from a practical point of view.
VAN DEN AKKER, Janna M. +2 more
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Constraint Programming-based Column Generation
Annals of Operations Research, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
GUALANDI S, MALUCELLI, FEDERICO
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Chemistry International, 2016
Abstract As I sit down to write this column, IUPAC is about to tick off one biennium and begin another. Each time this happens the organisation renews itself as new people cycle into the positions and committees that plan, initiate, and undertake the work of the Union.
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Abstract As I sit down to write this column, IUPAC is about to tick off one biennium and begin another. Each time this happens the organisation renews itself as new people cycle into the positions and committees that plan, initiate, and undertake the work of the Union.
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2016
In this chapter, we shall discuss the most important computational technique of solving a large linear program. If a linear program has a very large number of columns (variables), perhaps too many to write down, we can use the column generating technique to obtain the optimum solution.
T. C. Hu, Andrew B. Kahng
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In this chapter, we shall discuss the most important computational technique of solving a large linear program. If a linear program has a very large number of columns (variables), perhaps too many to write down, we can use the column generating technique to obtain the optimum solution.
T. C. Hu, Andrew B. Kahng
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2019
This chapter discusses a generalized Reut’s column, one of the models in the nonconservative problems of structural stability, showing that a mechanical model of the column is realizable in laboratories. A method for realizing the Reut force with a constant line of action, and a generalized Reut force as well, is proposed.
Yoshihiko Sugiyama +2 more
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This chapter discusses a generalized Reut’s column, one of the models in the nonconservative problems of structural stability, showing that a mechanical model of the column is realizable in laboratories. A method for realizing the Reut force with a constant line of action, and a generalized Reut force as well, is proposed.
Yoshihiko Sugiyama +2 more
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Polymer News, 2005
Safety glass is defined as “glass” that diminishes the threat of injuries and robberies as a result of impacts, distortion, or fire. In 1905 British inventor John C.
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Safety glass is defined as “glass” that diminishes the threat of injuries and robberies as a result of impacts, distortion, or fire. In 1905 British inventor John C.
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Chemistry International -- Newsmagazine for IUPAC, 1997
In this month’s column I would like to comment on the 39th General Assembly, held in Geneva, Switzerland, 23–30 August 1997, and to report some of the major actions by the Bureau and Council. In my opinion, this was a very successful meeting, in which about 670 chemists participated, primarily in dozens of meetings of small groups—commissions ...
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In this month’s column I would like to comment on the 39th General Assembly, held in Geneva, Switzerland, 23–30 August 1997, and to report some of the major actions by the Bureau and Council. In my opinion, this was a very successful meeting, in which about 670 chemists participated, primarily in dozens of meetings of small groups—commissions ...
openaire +1 more source