Submarine equivalents of ash flows in the Tokiwa Formation, Japan
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Abstract:
Five sequences of pumiceous dacitic debris interbedded with fossiliferous marine mudstones are recognized inthe Tokiwa formation (Miocene). They represent the quenched and laterally transported products of submarine explosions. The mechanisms and environment of deposition are discussed.Keywords:
Deposition
Efficiency of searching submarine is an important reference for evaluating the characteristic of sonobuoy array.In order to research the influence of sonobuoy arrays on the efficiency of searching submarine,the thesis gives the mathematical models of submarine movement and sonobuoy array in aerial searching submarine,according to the need of aerial antisubmarine warfare.Associating with the parameters of searching submarine,such as the number of sonobouy,range between antisubmarine bases and original submarine position,velocity of antisubmarine aircraft and movement of submarine,Monte Carlo method is used to simulate and analyze the efficiencies of searching submarine by using different sonobuoy arrays.Simulation results show that sonobuoy arrays have great difference and monolayer circular sonobuoy array has better efficiency of searching submarine,and this offers a subsidiary reference for sonar operator to optimize sonobuoy array.
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