To all Sandians: Each year we at Sandia National Laboratories
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منابع مشابه
Limits on Relief through Constrained Exchange on Random Graphs
Agents are represented by nodes on a random graph (e.g., small world or truncated power law). Each agent is endowed with a zero-mean random value that may be either positive or negative. All agents attempt to find relief, i.e., to reduce the magnitude of that initial value, to zero if possible, through exchanges. The exchange occurs only between agents that are linked, a constraint that turns o...
متن کاملA taxonomy and comparison of parallel block multi-level preconditioners for the incompressible Navier-Stokes equations
In recent years, considerable effort has been placed on developing efficient and robust solution algorithms for the incompressible Navier–Stokes equations based on preconditioned Krylov methods. These include physicsbased methods, such as SIMPLE, and purely algebraic preconditioners based on the approximation of the Schur complement. All these techniques can be represented as approximate block ...
متن کاملMultilevel Methods for Eigenspace Computations in Structural Dynamics
1 Sandia National Laboratories, [email protected]. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the U.S. Department of Energy under contract DE-AC04-94AL85000. 2 Sandia National Laboratories, [email protected]. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the U.S. Department of Energy u...
متن کاملThe Effect of Boundary Conditions within Pressure Convection–Diffusion Preconditioners
We explore choices of boundary conditions within pressure convection–diffusion preconditioners for the incompressible Navier–Stokes equations. While these methods have been shown to be efficient, choosing the proper boundary conditions for the preconditioning operator is not well understood. In this paper, we first explore the effect of having “ideal” boundary conditions within the precondition...
متن کاملSensor Placement in Municipal Water Networks with Temporal Integer Programming Models
We present a mixed-integer programming (MIP) formulation for sensor placement optimization in municipal water distribution systems that includes the temporal characteristics of contamination events and their impacts. Typical network water quality simulations track contaminant concentration and movement over time, computing contaminant concentration time-series for each junction. Given this info...
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تاریخ انتشار 2002