Through the actual measurement of the noises from the large-size mining centrifugal blower and the treamment of noises and vibrational signals, the results of the power spectrum, the correlation and coherent function etc. , can be obtained These results will provide precise and reliable basis for the noises fron blower and vibration control.
The idea of operation in beam-space and coherent subspace method (CSM) were introduced into acoustic vector array signal processing. Based on the vector array model built by Michael Zoltowsk,a new algorithm of acoustic vector array beam-space broadband-focused MUSIC was derived.
Discrete Frames of Poincaré Coherent States in 1+3 Dimensions
Continuous frames of coherent states of the Poincaré group in 1+3
Generalized Maximum Likelihood Algorithm for Direction-of-Arrival Estimation of Coherent Sources
It is flexible in the sense that the arriving sources may be a mixture of multiclusters of coherent sources, the array geometry is unrestricted, and the number of sources resolved can be larger than the number of sensors.
It is concluded that the performance of the GML algorithm coincides with that of the DML algorithm in the incoherent sources' case, while it improves greatly in the coherent source case.
Based on electromagnetic theory, a computing model of the Talbot interferometer is established with the temporal and the spatial coherence taken into account and with the turning angle of the reflectors as a critical parameter.
To accurately represent the piezoresistive properties of RTD, the current-voltage characteristic coherence of the same RTD was tested.
Compared with the results of the finite element software SAMCEF, the numerical simulation results show the good coherence and advantages of the analysis method.
The first feedback strategy can effectively acquire information, but it destroys the coherence in feedback loop.
On the contrary, coherent quantum feedback does not destroy the coherence, but the capability of information acquisition is limited.
Particular attention is given to a coherent superposition of classically distinguishable states.
DPM is based on monitoring and analyzing the interference image of a specimen in a coherent laser beam.
The advantages and drawbacks of the double scanning method are discussed in comparison with the method of projection in the spectral space (PSS), which is also used for a coherent reconstruction of flaw images.
The parameters were varied in sufficiently wide ranges to let a coherent picture of the polarimetric properties of relatively small aggregate particles emerge (the size parameter of the aggregate is less than 10).
The described experiment is the first demonstration of the use of a high-power, high-stability transmitting-receiving system for producing a coherent insonification with a frequency of 195 Hz.