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

Description: 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: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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

Description: 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: Refine your search to only 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

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microearthquake moment tensors from the Coso Geothermal area

Description: 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: Refine your search to only Article
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
open access

Applications of Optimal Building Energy System Selection and Operation

Description: Berkeley Lab has been developing the Distributed Energy Resources Customer Adoption Model (DER-CAM) for several years. Given load curves for energy services requirements in a building microgrid (u grid), fuel costs and other economic inputs, and a menu of available technologies, DER-CAM finds the optimum equipment fleet and its optimum operating schedule using a mixed integer linear programming approach. This capability is being applied using a software as a service (SaaS) model. Optimisation p… more
Date: April 1, 2011
Creator: Marnay, Chris; Stadler, Michael; Siddiqui, Afzal; DeForest, Nicholas; Donadee, Jon; Bhattacharya, Prajesh et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

EIA model documentation: World oil refining logistics demand model,``WORLD`` reference manual. Version 1.1

Description: This manual is intended primarily for use as a reference by analysts applying the WORLD model to regional studies. It also provides overview information on WORLD features of potential interest to managers and analysts. Broadly, the manual covers WORLD model features in progressively increasing detail. Section 2 provides an overview of the WORLD model, how it has evolved, what its design goals are, what it produces, and where it can be taken with further enhancements. Section 3 reviews model man… more
Date: April 11, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Concentrating Solar Deployment System (CSDS) -A New Model for Estimating U.S. Concentrating Solar Power (CSP) Market Potential

Description: This paper presents the Concentrating Solar Deployment System Model (CSDS). CSDS is a multiregional, multitime-period, Geographic Information System (GIS), and linear programming model of capacity expansion in the electric sector of the United States. CSDS is designed to address the principal market and policy issues related to the penetration of concentrating solar power (CSP) electric-sector technologies. This paper discusses the current structure, capabilities, and assumptions of the model. … more
Date: April 1, 2006
Creator: Blair, N.; Mehos, M.; Short, W. & Heimiller, D.
Item Type: Refine your search to only Article
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
open access

A new bound for the 2-edge connected subgraph problem

Description: Given a complete undirected graph with non-negative costs on the edges, the 2-Edge Connected Subgraph Problem consists in finding the minimum cost spanning 2-edge connected subgraph (where multi-edges are allowed in the solution). A lower bound for the minimum cost 2-edge connected subgraph is obtained by solving the linear programming relaxation for this problem, which coincides with the subtour relaxation of the traveling salesman problem when the costs satisfy the triangle inequality. The si… more
Date: April 1, 1998
Creator: Carr, R. & Ravi, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Minimum-time control of systems with Coloumb friction: Near global optima via mixed integer linear programming

Description: This work presents a method of finding near global optima to minimum-time trajectory generation problem for systems that would be linear if it were not for the presence of Coloumb friction. The required final state of the system is assumed to be maintainable by the system, and the input bounds are assumed to be large enough so that they can overcome the maximum static Coloumb friction force. Other than the previous work for generating minimum-time trajectories for non redundant robotic manipula… more
Date: April 25, 2000
Creator: Driessen, Brian & Sadegh, Nader
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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