Abstract The emergence of high-powered femtosecond lasers presents the opportunity for large volume processing inside of transparent materials, wherein a myriad of nonlinear optical and aberration effects typically convolves to distort sled shelf the focused beam shape.In this paper, convex and concave conical phase fronts were imposed on femtoseco
The U.S.Gulf of Mexico Coastal Region encompasses a diverse spitfire sapphires wheels suite of ecological and cultural characteristics unique to North America.There are unprecedented opportunities for land conservation in the region, but challenges associated with non-complimentary ecological and socioeconomic priorities and access to scientific da
Aiming at path planning problem of the unstructured environment attributions for roadheader roadway this paper analyzes the attributes and behavior constraints of unstructured environments,and a dynamic random grid gator phi gator network model with constraint information was defined(C-G Net).The minimum cost modeling method was proposed by optimiz
As a part of creative cultural industry, heritage tourism combines cultural, historical, artistic and scientific values.It includes both spiritual consumption and material consumption.It is not only a social and cultural phenomenon, but also an economic phenomenon, upgrading from sightseeing to purchasing goods and then to cultural experience.The p