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in subjects: "Linear Programming"  
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Evaluation of carbon dioxide emission control strategies in New York State

Description: A MARKAL model was developed for the State of New York. It represents the state's energy system as a set of typical technologies for generating, converting, and using energy as it evolves over a 45-year period. NYMARKAL was applied here in demonstration analyses to explore strategies to reduce CO{sub 2} emissions. NYMARKAL was installed at the State Energy Office and in the Offices of the New York Power Pool. Staff members from both organizations and other state agencies were trained in its use… more
Date: January 1, 1992
Creator: Morris, S.C.; Lee, J.; Goldstein, G. & Hill, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Planning under uncertainty solving large-scale stochastic linear programs

Description: For many practical problems, solutions obtained from deterministic models are unsatisfactory because they fail to hedge against certain contingencies that may occur in the future. Stochastic models address this shortcoming, but up to recently seemed to be intractable due to their size. Recent advances both in solution algorithms and in computer technology now allow us to solve important and general classes of practical stochastic problems. We show how large-scale stochastic linear programs can … more
Date: December 1, 1992
Creator: Infanger, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MARKAL-MACRO: A linked model for energy-economy analysis

Description: MARKAL-MACRO is an experiment in model linkage for energy and economy analysis. This new tool is intended as an improvement over existing methods for energy strategy assessment. It is designed specifically for estimating the costs and analyzing the technologies proposed for reducing environmental risks such as global climate change or regional air pollution. The greenhouse gas debate illustrates the usefulness of linked energy-economy models. A central issue is the coupling between economic gro… more
Date: February 1, 1992
Creator: Manne, A.S. (Stanford Univ., CA (United States)) & Wene, C.O. (Brookhaven National Lab., Upton, NY (United States) Chalmers Univ. of Tech., Goeteborg (Sweden))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bracketing to speed convergence illustrated on the von Newmann algorithm for finding a feasible solution to a linear program with a convexity contraint

Description: Analogous to gunners firing trial shots to bracket a target in order to adjust direction and distance, we demonstate that it is sometimes faster not to apply an algorithm directly, but to roughly approximately solve several perturbations of the problem and then combine these rough approximations to get an exact solution. To find a feasible solution to an m-equation linear program with a convexity constraint, the von Neumann Algorithm generates a sequence of approximate solutions which converge … more
Date: October 1, 1992
Creator: Dantzig, G.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A strictly improving linear programming alorithm based on a series of Phase 1 problems

Description: When used on degenerate problems, the simplex method often takes a number of degenerate steps at a particular vertex before moving to the next. In theory (although rarely in practice), the simplex method can actually cycle at such a degenerate point. Instead of trying to modify the simplex method to avoid degenerate steps, we have developed a new linear programming algorithm that is completely impervious to degeneracy. This new method solves the Phase II problem of finding an optimal solution b… more
Date: April 1, 1992
Creator: Leichner, S. A.; Dantzig, G. B. & Davis, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of carbon dioxide emission control strategies in New York State. Final report, 1990--1991

Description: A MARKAL model was developed for the State of New York. It represents the state`s energy system as a set of typical technologies for generating, converting, and using energy as it evolves over a 45-year period. NYMARKAL was applied here in demonstration analyses to explore strategies to reduce CO{sub 2} emissions. NYMARKAL was installed at the State Energy Office and in the Offices of the New York Power Pool. Staff members from both organizations and other state agencies were trained in its use… more
Date: January 1, 1992
Creator: Morris, S. C.; Lee, J.; Goldstein, G. & Hill, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A strictly improving Phase 1 algorithm using least-squares subproblems

Description: Although the simplex method`s performance in solving linear programming problems is usually quite good, it does not guarantee strict improvement at each iteration on degenerate problems. Instead of trying to recognize and avoid degenerate steps in the simplex method, we have developed a new Phase I algorithm that is completely impervious to degeneracy, with strict improvement attained at each iteration. It is also noted that the new Phase I algorithm is closely related to a number of existing a… more
Date: April 1, 1992
Creator: Leichner, S. A.; Dantzig, G. B. & Davis, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A comparative analysis of energy demand and expenditures by minority and majority households within the context of a conditional demand system

Description: Analysis and evaluation of the impact that programs and policies have on energy consumption and expenditures are confounded by many intervening variables. A clear understanding of how these variables influence energy consumption patterns should be grounded in a rigorously developed framework. In this regard much is documented in the literature. However, an analysis of the comparative relationship between energy demand and variables which influence it among different socioeconomic groups has not… more
Date: January 1, 1992
Creator: Poyer, D. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MARKAL-MACRO: A linked model for energy-economy analysis

Description: MARKAL-MACRO is an experiment in model linkage for energy and economy analysis. This new tool is intended as an improvement over existing methods for energy strategy assessment. It is designed specifically for estimating the costs and analyzing the technologies proposed for reducing environmental risks such as global climate change or regional air pollution. The greenhouse gas debate illustrates the usefulness of linked energy-economy models. A central issue is the coupling between economic gro… more
Date: February 1992
Creator: Manne, Alan S. & Wene, Clas-Otto
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Planning under uncertainty solving large-scale stochastic linear programs

Description: For many practical problems, solutions obtained from deterministic models are unsatisfactory because they fail to hedge against certain contingencies that may occur in the future. Stochastic models address this shortcoming, but up to recently seemed to be intractable due to their size. Recent advances both in solution algorithms and in computer technology now allow us to solve important and general classes of practical stochastic problems. We show how large-scale stochastic linear programs can … more
Date: December 1, 1992
Creator: Infanger, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bracketing to speed convergence illustrated on the von Newmann algorithm for finding a feasible solution to a linear program with a convexity contraint. Technical report

Description: Analogous to gunners firing trial shots to bracket a target in order to adjust direction and distance, we demonstate that it is sometimes faster not to apply an algorithm directly, but to roughly approximately solve several perturbations of the problem and then combine these rough approximations to get an exact solution. To find a feasible solution to an m-equation linear program with a convexity constraint, the von Neumann Algorithm generates a sequence of approximate solutions which converge … more
Date: October 1, 1992
Creator: Dantzig, G. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A strictly improving linear programming alorithm based on a series of Phase 1 problems

Description: When used on degenerate problems, the simplex method often takes a number of degenerate steps at a particular vertex before moving to the next. In theory (although rarely in practice), the simplex method can actually cycle at such a degenerate point. Instead of trying to modify the simplex method to avoid degenerate steps, we have developed a new linear programming algorithm that is completely impervious to degeneracy. This new method solves the Phase II problem of finding an optimal solution b… more
Date: April 1, 1992
Creator: Leichner, S. A.; Dantzig, G. B. & Davis, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A strictly improving Phase 1 algorithm using least-squares subproblems

Description: Although the simplex method's performance in solving linear programming problems is usually quite good, it does not guarantee strict improvement at each iteration on degenerate problems. Instead of trying to recognize and avoid degenerate steps in the simplex method, we have developed a new Phase I algorithm that is completely impervious to degeneracy, with strict improvement attained at each iteration. It is also noted that the new Phase I algorithm is closely related to a number of existing a… more
Date: April 1, 1992
Creator: Leichner, S. A.; Dantzig, G. B. & Davis, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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