Boots – shoes – and leggings
Patent
1995-10-12
1997-09-16
Ruggiero, Joseph
Boots, shoes, and leggings
364158, 395 21, 395919, 701117, G05B 1304, G06F 1518
Patent
active
056687176
ABSTRACT:
A method and apparatus for model-free, real-time, system-wide signal timing for a complex road network is provided. It provides timings in response to instantaneous flow conditions while accounting for the inherent stochastic variations in traffic flow through the use of a simultaneous perturbation stochastic approximation (SPSA) algorithm. This is achieved by setting up several (M) parallel neural networks, each of which produces optimal controls (signal timings) for any time instant (within one of the M time periods) based on observed traffic conditions. The SPSA optimization technique is critical to the feasibility of the approach since it provides the values of weight parameters in each of the neural networks without the need for a model of the traffic flow dynamics.
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Cooch Francis A.
Ruggiero Joseph
The Johns Hopkins University
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