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International crude oil prices volatility has significant effects on global economic activities. On the basis of WTI crude oil futures price of New York Mercantile Exchange (NYMEX) from Apr 1983 to Aug 2008, this paper analyze the multifractal spectrum of crude oil futures prices. The results show that the crude oil prices have multifractal characteristics; international oil futures market has the...
The simulated experiments are generally adopted to study the control performance of earth-pressure-balance system of shield machine economically and safely. But, the range and strength of simulated experiments are usually restricted by the physical conditions of simulated system. In this study, the simulation model of earth-pressure-balance simulated system of shield machine was established based...
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