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Underwater acoustic source localization has attracted wide interests, and the source depth estimation is more difficult than that of source range and bearing. The performance of Matched Field Processing (MFP) degrades greatly under environment parameter mismatches, which makes it limited in practice. Varieties of robust methods have been proposed to relieve the mismatch problems. T. C. Yang proposed...
Depending on the fact that knowledge can be learned by oneself, which is different from epidemic spreading, we take into account self-learning mechanism in the knowledge transfer process. In this paper, we propose a knowledge transfer model, and derive the mean-field equations that describe the dynamics of the knowledge transfer in homogeneous networks. Using differential theory, we obtain the knowledge...
When using shield driven method to construct tunnels, mechanical properties of injecting cement paste will change at curing age. And then ground settlement will also change because of changes of mechanical properties of injecting cement paste. Based on the first line of Ningbo rail transit, this paper will discuss the effect of ground settlement caused by changes of elastic modulus and Poisson's ratio...
A software on computational fluid dynamics,FLUENT, is introduced to simulate the oscillating characteristics in the parallel plate fold regenerator. Results show that for a specific point, pressure oscillations with the change of time is sinusoidal or cosine waveform, and due to the periodic oscillation of pressure, the temperature and velocity periodically changing around the balance point, the variation...
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