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in subjects: "Linear Programming"

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Experiment in multiple-criteria energy policy analysis. [Using HOPE (holistic preference evaluation)]

An international panel of energy analysts participated in an experiment to use HOPE (holistic preference evaluation): an interactive parametric linear-programming method for multiple-criteria optimization. The criteria of cost, environmental effect, crude oil, and nuclear fuel were considered according to BESOM: an energy model for the US in the year 2000.

Date: July 1, 1980

Creator: Ho, J K

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Review of petroleum transport network models and their applicability to a national refinery model

This report examines four petroleum transport network models to determine whether parts of them can be incorporated into the transportation component of a national refinery model. Two questions in particular are addressed. (a) How do the models under examination represent the oil transport network, estimate link capacities, and calculate transport costs. (b) Are any of these network representations, capacity estimates, or cost functions suitable for inclusion in a linear programming model of oi… more

Date: April 1, 1982

Creator: Hooker, J. N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Energy optimization in DOD facilities

A static linear programming formulation (management tool) of energy optimization problems on military bases has been developed to assist each of the military services in their planning activities and budgetary allocation decisions. Several objective functions have been defined, resulting in two types of model capabilities: minimization of capital costs (investments) subject to a number of energy and dollar constraints and the maximization of energy savings subject to capital and operating fund … more

Date: January 1, 1981

Creator: Roach, F.; Kirschner, C. & Salmon, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Linear-programming approach to county-level energy-scenario disaggregation

Many recent national and regional Energy Planning Studies utilize the scenario approach as a framework for R and D Assessment or policy analysis, with information detail at best to the census or Reliability Council Region level. Unfortunately, such scenarios are of limited utility to State Agencies, or to those interested in environmental-impact or resource-constraint questions. This paper describes an LP disaggregation procedure to translate regional energy scenarios to county-level detail, wi… more

Date: January 1, 1977

Creator: Meier, P.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

New approaches to linear and nonlinear programming

During the last twelve months, research has concentrated on barrier- function methods for linear programming (LP) and quadratic programming (QP). Some ground-work for the application of barrier methods to nonlinearly constrained problems has also begun. In our previous progress report we drew attention to the difficulty of developing robust implementations of barrier methods for LP. We have continued to refine both the primal algorithm and the dual algorithm. We still do not claim that the barr… more

Date: March 1, 1990

Creator: Murray, W. & Saunders, M.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Linear-programming approach to electricity demand-curtailment planning

Curtailment planning at a generally rudimentary level has been undertaken by the governments of some twenty states. Many utilities have demand-curtailment plans, however, these are often incorporated in plans for meeting capacity shortages. In at least five states, there are apparently no curtailment plans either at the state-government level or at the utility level. Moreover, none of the existing electricity demand curtailment plans examined included an explicit statement of the planners'… more

Date: May 1, 1980

Creator: Allentuck, J; Carroll, O & Schnader, M

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Development of software for computer assisted model simplification. Final report. [Lagrange multipliers]

The final report of DBS Corporation on the model simplification project is presented. The purpose of the project is to develop computer-assisted model simplification. The contributions of DBS to this project where an initial overall project assessment, contributions to design principles and testing procedures, specific experimental designs, and initial test results. The main contributions of DBS to this project were in the area of LP matrix scaling, and particularly in the potential usefulness … more

Date: April 25, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

LIFT: a nested decomposition algorithm for solving lower block triangular linear programs. Report AMD-859. [In PL/I for IBM 370]

Nested decomposition of linear programs is the result of a multilevel, hierarchical application of the Dantzig-Wolfe decomposition principle. The general structure is called lower block-triangular, and permits direct accounting of long-term effects of investment, service life, etc. LIFT, an algorithm for solving lower block triangular linear programs, is based on state-of-the-art modular LP software. The algorithmic and software aspects of LIFT are outlined, and computational results are presen… more

Date: June 1, 1980

Creator: Ament, D; Ho, J; Loute, E & Remmelswaal, M

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Sparse linear programming subprogram

This report describes a subprogram, SPLP(), for solving linear programming problems. The package of subprogram units comprising SPLP() is written in Fortran 77. The subprogram SPLP() is intended for problems involving at most a few thousand constraints and variables. The subprograms are written to take advantage of sparsity in the constraint matrix. A very general problem statement is accepted by SPLP(). It allows upper, lower, or no bounds on the variables. Both the primal and dual solutions a… more

Date: December 1, 1981

Creator: Hanson, R.J. & Hiebert, K.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

New approaches to linear and nonlinear programming

This report describes technical progress during the past twelve months on DOE Contract DE-FG-87ER25030 and requests support for the third year. The project involves study of the theoretical properties and computational performance of techniques that solve linear and nonlinear programs by means of nonlinear transformations. The group at the Systems Optimization Laboratory (SOL) were the first to recognize the connection between Karmarkar's projective method and the logarithmic barrier method. It… more

Date: September 1, 1988

Creator: Murray, W. & Saunders, M.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of carbon dioxide emission control strategies in New York State

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: Report

Partner: UNT Libraries Government Documents Department

open access

TRANSF code user manual

The TRANSF code is a semi-interactive FORTRAN IV program which is designed to calculate the model parameters of a (structural) system by performing a least square parameter fit to measured transfer function data. The code is available at LLNL on both the 7600 and the Cray machines. The transfer function data to be fit is read into the code via a disk file. The primary mode of output is FR80 graphics, although, it is also possible to have results written to either the TTY or to a disk file.

Date: November 1, 1981

Creator: Weaver, H.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Economic effects of petroleum-supply shortfalls on the US economy: alternatives to the SCAM methodology

The DRI Quarterly Macro Model is used to forecast final demands and simulate the base case for the Supply Constrained Analysis Modeling (SCAM) system. As in other commercially available macroeconomic forecasting models, the only expectations formulation used in the DRI Macro Model is adaptive in nature and is estimated with historical data. This is inadequate in modeling short-term major changes in consumption behavior, for example, panic buying of gasoline, when there is a supply shortfall in … more

Date: June 1, 1981

Creator: Anandalingam, G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Methods of mathematical programming to program planning and R and D strategies

This paper discusses how some methods of mathematical programming might effectively be used to guide R and D planning with respect to total budget; budget distribution between supply and demand technologies; budget distribution among competing technologies; and budget distribution in light of the need to diversify and avoid risk. The discussion is limited to special frameworks such as linear programming, mixed-integer programming, and quadratic programming since they are most characteristic of … more

Date: December 1, 1979

Creator: Kydes, A S

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Decomposition of Large Scale Semantic Graphsvia an Efficient Communities Algorithm

Semantic graphs have become key components in analyzing complex systems such as the Internet, or biological and social networks. These types of graphs generally consist of sparsely connected clusters or 'communities' whose nodes are more densely connected to each other than to other nodes in the graph. The identification of these communities is invaluable in facilitating the visualization, understanding, and analysis of large graphs by producing subgraphs of related data whose interrelationship… more

Date: February 8, 2008

Creator: Yao, Y

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Seismic monitoring of EGS tests at the Coso Geothermal area, California, using accurate MEQ locations and full moment tensors

We studied high-resolution relative locations and full moment tensors of microearthquakes (MEQs) occurring before, during and following Enhanced Geothermal Systems (EGS) experiments in two wells at the Coso geothermal area, California. The objective was to map new fractures, determine the mode and sense of failure, and characterize the stress cycle associated with injection. New software developed for this work combines waveform crosscorrelation measurement of arrival times with relative reloca… more

Date: April 1, 2008

Creator: Foulger, G.R.; B.R. Julian, B.R. & Monastero, F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LDRD final report on massively-parallel linear programming : the parPCx system.

This report summarizes the research and development performed from October 2002 to September 2004 at Sandia National Laboratories under the Laboratory-Directed Research and Development (LDRD) project ''Massively-Parallel Linear Programming''. We developed a linear programming (LP) solver designed to use a large number of processors. LP is the optimization of a linear objective function subject to linear constraints. Companies and universities have expended huge efforts over decades to produce f… more

Date: February 1, 2005

Creator: Parekh, Ojas (Emory University, Atlanta, GA); Phillips, Cynthia Ann & Boman, Erik Gunnar

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Dsdp5 User Guide - Software for Semidefinite Programming.

DSDP implements the dual-scaling algorithm for semidefinite programming. The source code of this interior-point solver, written entirely in ANSI C, is freely available. The solver can be used as a subroutine library, as a function within the Matlab environment, or as an executable that reads and writes to files. Initiated in 1997, DSDP has developed into an efficient and robust general-purpose solver for semidefinite programming. Although the solver is written with semidefinite programming in m… more

Date: January 24, 2006

Creator: Benson, S. J.; Ye, Y. & Science, Mathematics and Computer

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Microearthquake moment tensors from the Coso Geothermal area

The Coso geothermal area, California, has produced hot water and steam for electricity generation for more than 20 years, during which time there has been a substantial amount of microearthquake activity in the area. Seismicity is monitored by a high-quality permanent network of 16 three-component digital borehole seismometers operated by the US Navy and supplemented by a ~ 14-station portable array of surface three-component digital instruments. The portable stations improve focal sphere cover… more

Date: April 1, 2007

Creator: Julian, B.R.; Foulger, G.R. & Monastero, F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Planning under uncertainty solving large-scale stochastic linear programs

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: Report

Partner: UNT Libraries Government Documents Department

open access

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

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: Report

Partner: UNT Libraries Government Documents Department

open access

Development of high energy density fuels from mild gasification of coal

The overall objective of the program is the determination of the minimal processing requirements to produce High Energy Density Fuels (HEDF), meeting a minimal energy density of 130,000 Btu/gal (conventional jet fuels have energy densities in the vicinity of 115,000--120,000 Btu/gal) and having acceptable advanced fuel specifications in accordance with the three defined categories of HEDF. The program encompasses assessing current technology capability; selecting acceptable processing and refin… more

Date: October 1, 1990

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Linear-discontinuous Galerkin approximation for the continuous-slowing-down operator

A linear-discontinuous Galerkin treatment is developed for the continuous-slowing-down operator. Multigroup Legendre coefficients are derived which allow this treatment to be implemented in standard S/sub n/ codes. A synthetic acceleration scheme is developed to accelerate the outer iterations required by this treatment. A computational comparison between a first-order multigroup treatment, the diamond-difference treatment, and the linear-discontinuous treatment is given. 13 references, 6 figur… more

Date: January 1, 1985

Creator: Lazo, M.S. & Morel, J.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Research on trust-region algorithms for nonlinear programming

This report discusses research on the following topics: interior- point methods for linear programming; trust-region SQP newton's method for general nonlinear programming problems; trust-region SQP newton's method for large sparse nonlinear programming problems with applications to oil reservoir management; a unified approach to global convergence of trust-region methods for nonsmooth optimization; and SQP augmented lagrangian BRGS algorithm for constrained optimization. (LSP).

Date: November 1, 1991

Creator: Dennis, J.E. & Tapia, R.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department