At present, the anti-counterfeiting fibers are mainly monochromatic fluorescent fibers, dual-band fluorescent fibers, and multicolor segment dyed fibers. However, anti-counterfeiting fibers using only these several anti-counterfeiting methods are increasingly unable to meet the needs of anti-counterfeiting technology for high efficiency, greenness, and security. This paper studies the method of setting passwords using multi-bit sequence programming in the spinning process, and enables passwords to be effectively stored throughout the fiber production and sales chain. Because nanoscale metal inorganic salts and metal oxide powders have good dispersion, they can be well and uniformly dispersed in the spinning solution. In addition, metal elements can be relatively stable in the spinning process, providing the possibility of traceability of programmable passwords. Setting a password in this method can effectively improve the anti-counterfeiting performance of the fiber without affecting the basic properties of the fiber, and will help to develop new technology for tracking and identifying anti-counterfeit fibers.
This paper brings forward a monocular vision detection algorithm in allusion to the specific object’s pose based on Hausdorff Distance. At first, according to the mathematic model which has been established, the 2D template sequence is generated by projecting the specific object in different poses into the image plane of a virtual camera. Then, in order to predigest calculations and accelerate the matching speed during the image matching, the algorithm adopts the local-mean Hausdorff Distance as matching estimate and adopts the search strategy based on hiberarchy which reduces the searching rang by the threshold method before accurate match. In the end of this paper, the experiment that measures the poses of the clamp via the different clamp images respectively is given to testify the validity and speediness of this algorithm.
The effects of the concentrations of NiSO4•6H2O, NaH2PO2•H2O and complexing agents in bath, temperature, pH, SiC concentration etc. on deposition rate of electroless Ni-P plating were systematically studied. The appropriate deposition rate of electroless Ni-P plating (17μm h-1) was obtained at the optimal conditions. The deposition reaction dynamics of electroless Ni-P plating on AZ91D magnesium alloy was discussed and the corresponding kinetic model was also determined based on the corresponding experimental results.
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