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We have demonstrated LP01-LP11 cross-mode interference in a single chirped grating (CG) inscribed in a two-mode fiber (TMF). With the aid of a binary phase plate, LP01 mode and LP11 mode can be selectively excited in the CG. By offsetting the position of the phase plate from the center of the input beam, we can simultaneously excite both the spatial modes at different LP01:LP11 intensity ratios in...
Local administrative departments in charge of agricultural machinery should focus more capital investment on constructing the regional advice station for agricultural machinery, which could help improve the agricultural mechanization level, increase the income and reduce the labor intensity of farmers. However, there existed problems like embezzlement and poor construction effect during the project...
Combining extension engineering method with cluster analysis, the classic and limited matter elements were constructed according to air quality standards and main air affecting factors. The logical domain was extended from (0, 1)to (-∞ ,+∞), meanwhile, the quantitative analysis in the classic matter-set which only judged by Yes or No was extended to qualitative analysis, which could show the administrative...
With the adequately analysis of attribution and forming mechanics of the extreme weather disasters, such as gale, hail, rainfall and drought in Hunan Province, 32 theory indexes covered weather background, population, economy and transportation system was chosen. In order to selected right indexes, an empirical study is conducted by subject degree analysis and importance analysis based on large sample...
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