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The low and medium frequency signal generator with high precision and high stability is widely used in experiment courses, mechanical, engineering and other fields. In order to meet the special needs of these fields, this paper puts forward a design scheme of signal generator based on DDS. Combined with the advantage of virtual instrument technology, the user can set the signal parameters on PC control...
This paper proposed an adaptive level set algorithm combining region statistical information for color image segmentation. In this model, we deduce image segmentation model with Maximum a posteriori according to Bayesian theory, and combine it into GAC model. Firstly, construct a speed stop function based on region statistical information which combines region statistical character and Bayesian model...
With the assumption that NSV suffers the violent changes of aerodynamic paameters and the outside disturbance in hypersonic condition, to achieve high precision, an (fuzzy disturbance observer)FDO is designed which improves the approximation ability of the observer on-line. The strict proof of the Lyapunov stability is provided simutanously.
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