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We developed a new technique for constructing humidity sensor comprised of two cascaded peanut-shape structure which were coated with polyvinyl alcohol (PVA) and in between was also coated with PVA. The coating changes with the humidity which resulting in the change of the effective refractive index, and lead to the change of the interference wavelength. Experiments show that, with the humidity changes...
An optical fiber sensor based on concave cone and long period fiber grating (LPG) is proposed, and the experimental curve and temperature are experimentally demonstrated. The sensor head consists of a combination of concave cone and long-period fiber grating. The experimental results show that the interference peaks of the resonant wavelengths of the concave cone and the long-period fiber grating...
To overcome the shortcomings of low solution precision of the nonlinear constraint optimization problems, a new optimization algorithm based on the particle filter, which is used to solve nonlinear constraint optimization problems, is brought forward in this paper. And the model and mechanism of particle filter are combined in this optimization algorithm. Firstly, the basic principle of the particle...
In nonlinear blind source separation (NBSS), usually it is very difficulty to find the global optimal solutions of cost functions due to the existence of many local optimal solutions. In order to overcome the disadvantage mentioned above, a NBSS algorithm based on immune clonal algorithm is proposed in this paper. The odd polynomial function of high-order is used to fit the nonlinear mixed function...
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