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以信号的模式识别为基础,应用模糊评判的方法,通过道集叠加得到标准道,对道集内的各道进行模糊评判,剔除评判结果最差的道,再次进行叠加、评判、别除,直到达到要求的评判结果或规定的最大别除道数。模拟试验表明,通过模糊评判方法得到的叠加记录的效果明显优于直接叠加。 相似文献
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Fabrication of Colloidal Photonic Crystals with Heterostructure by Spin-Coating Method 总被引:1,自引:0,他引:1
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Colloidal photonic crystal heterostructures, composed of two opaline photonic crystal films of silica spheres with different diameters, are fabricated by a two-step spin-coating method. Scanning electron microscopy (SEM) and UV-vis spectrophotometer are used to characterize the heterostructures. The SEM images show good ordering of the two-layer colloidal crystals constituting the heterostructures. The transmission spectra measured from the (111) plane in the heterostructure show that the composite colloidal photonic crystals have double photonic stop bands. Furthermore, when the sizes of the silica spheres used for fabricating the composite photonic crystal are slightly different, the transmission spectrum shows that the composite photonic crystals have more extended bandgap than that of the individual photonic crystals due to partial overlapping of its two photonic stop bands. 相似文献
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