摘要 :
There are currently several distinct preconditioning methods for dense matrices based on applying a wavelet transform to obtain a matrix with a large number of small entries. A sparse preconditioner for this transformed matrix can...
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There are currently several distinct preconditioning methods for dense matrices based on applying a wavelet transform to obtain a matrix with a large number of small entries. A sparse preconditioner for this transformed matrix can be formed by setting to zero entries that are assumed to be unimportant. The effectiveness of the preconditioner depends on retaining the most important entries and on ensuring that they are positioned conveniently within the transformed matrix. In this paper we present a new, recursive preconditioning strategy that takes into account more of the significant entries without greatly increasing cost and outperforms existing methods in certain cases.
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摘要 :
When handling traffic in an ATM device, the hardware implementa- tion of the required protocol pro- cessing through a high gate-density ASIC provides much of the pro- Cessing power, yet the space Requirements for data handling are...
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When handling traffic in an ATM device, the hardware implementa- tion of the required protocol pro- cessing through a high gate-density ASIC provides much of the pro- Cessing power, yet the space Requirements for data handling are Still demanding.
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This Australian study presents the findings of a life-cycle assessment (LCA) that examined whether a re-use and recycle strategy for a plastic-based packaging that substantially reduces the quantity of waste to landfill would also...
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This Australian study presents the findings of a life-cycle assessment (LCA) that examined whether a re-use and recycle strategy for a plastic-based packaging that substantially reduces the quantity of waste to landfill would also reduce the overall environmental burden. The resources and environmental effects assessed over the life of each of the packagings included fossil fuel consumption, greenhouse gas emissions and photochemical oxidant precursors. The results demonstrate that recycle and reuse strategies for plastic-based products can yield significant environmental benefits. The study also includes some interesting findings regarding the relative contributions of transportation and construction energy, and the potential benefits of adjusting the impact assessment results to take into account the spatial variation in the significance of some environmental effects.
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As part of an ONR-sponsored STTR project, the authors have been working on a demonstration of the potential capabilities of a detail design expert system. The system is based on a toolkit that significantly reduces the time and co...
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As part of an ONR-sponsored STTR project, the authors have been working on a demonstration of the potential capabilities of a detail design expert system. The system is based on a toolkit that significantly reduces the time and cost required to build an advanced expert system, application coordinator and graphical user inter- face developed by Integration Partners, Inc. The project has focused on development and demonstration of the toolkit, using an air compressor system as the case study. The paper describes the system, discusses the potential benefits and uses of such a System, and presents the case study results.
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The DØ experiment at the Fermilab pp Tevatron collider (Batavia, IL, USA) has undergone significant upgrades in anticipation of high luminosity running conditions. As part of the upgrade, the capabilities of the Central Track Trig...
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The DØ experiment at the Fermilab pp Tevatron collider (Batavia, IL, USA) has undergone significant upgrades in anticipation of high luminosity running conditions. As part of the upgrade, the capabilities of the Central Track Trigger (CTT) to make trigger decisions
based on hit patterns in the Central Fiber Tracker (CFT) have been much improved. We report on the implementation, commissioning and operation of the upgraded CTT system.
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