Liu Mingjie

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This paper presents the de-noising method of EMD threshold based on correlation, using features of time scale filtering of EMD. Firstly, the sequence of noisy samples are disassembled by EMD to calculate the order of the intrinsic mode function (IMF) of them and calculate the correlation coefficient of IMF Portfolio with different order and Sampling(More)
On the basis of the research on the shock signal, the composition and frequency characteristic of the signal are proposed. Through the field test of the engine gearbox, the acceleration signal is achieved and conducted with spectrum analysis to obtain the natural frequency. A method of transient signal analysis based on the EEMD theory of order domain was(More)
In order to achieve the largest number of distributed network nodes and increase the communication security of network system in the conditions of long-range and high data rate, we introduce registration mechanism of communication nodes with distributed network nodes as the research object in this paper. With the application of single chip microcomputer(More)
On the basis of the research on the penetration acceleration signal, the composition and frequency characteristic of the acceleration signal are proposed. Through the projectile hammering test, the penetrating projectile response signal is achieved and conducted with spectrum analysis to obtain the natural frequency of the projectile then comparing with the(More)
Penetration acceleration signal acquired by acceleration sensor in the process of hard target penetration is a kind of non-stationary random signal, the occurrence of which lasting a very short period of time, and the conventional time-frequency analysis and non-parametric modeling methods cannot effectively analyze and deal with such signals. In this(More)
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