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This paper investigates the stochastic stability problem of genetic regulatory networks (GRNs) with multiple time-varying delays. Most of the results on the stability of GRNs with delays are based on a model in which the delays of the transcription and translation processes for each gene product take the same value. In this paper, we generalized the model to a differential equation with multiple time-varying...
Nanoparticles of BaLiF 3 :Er 3+ were prepared from the quaternary microemulsions of Cetyltrim-Enthyl Ammonium Bromide (CTAB), n-butanol, n-octane, and water, using the hydrothermal-microemulsion technique. The complex fluorides were characterized by means of X-ray power diffraction, Environmental Scanning Electron Microscopy (ESEM), and fluorescence spectra. The positions and intensities...
The methods are proposed to improve robustness of detecting the weld seam shaped zigzag line in the case of powerful arc light and light reflex. Firstly, robust estimation methods are proposed to fit the direction of weld seam and the normal vector of workpiece plane, which make the arc welding robot track weld seam with satisfied precision. Secondly, a predictive model for feature points of weld...
The methods to improve the robustness and adaptability of arc welding robots are presented. Image processing algorithm for feature extraction from structured light images of weld seam is discussed in the case of a large amount of strong reflection, arc light and splash disturbance. The processes consist of defining target region, selecting adaptive threshold and extracting feature points. Then a novel...
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