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Virtual particles and search for global minimum
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DOI：10.1016/S0167-739X(96)00024-6.png)
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摘要
En 中文
The models and computational techniques stemming from natural sciences - so-called natural solvers - become more and more popular as the methods of last resort in investigations of irreducible problems of universal character. In the paper, the author uses the concept of a virtual particle (VIP) model. It covers the broad range of natural solvers, which use VIPs as basic objects. The main features of particles paradigm proposed: simplicity, decomposition ability, and built-in message-passing way of communication, make it attractive as a universal approach for mapping different problems on parallel platform. In course of the paper, molecular dynamics (MD) is proposed as a pure VIP model. In dependence of the level of abstraction the particle can be defined as atom, cluster of molecules, piece of matter, object or UNIX process. MD applications as a method of search for global minimum in multi-dimensional function domain is discussed. The features extraction problem considered, shows the advantages of this technique. It is also shown that Hopfield nets can be mapped onto a particle model. The locality of the particles paradigm is discussed on the base of the spatial genetic algorithm.
Keyword:
natural solvers, virtual particles
global minimum search
molecular dynamics
predictive display
vehicle navigation
genetic algorithms
simulated annealing
Hopfield nets
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