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快特能™ RD 1000(Criterion™1000)测树器(图)
测树器 美国激光技术 树木直径 相对高度
2011/11/2
快特能™ RD 1000(Criterion™1000)测树器,是美国激光技术公司研制的首款精确测量树林面积和树木直径的电子测量仪器。
Simple geometric criterion to predict the existence of surface modes in air-core photonicbandgap fibers
Fiber design and fabrication Fiber optics optical communications
2015/8/11
We propose a simple geometric criterion based on the size of the core relative to the photonic crystal to quickly determine whether an aircore photonic-bandgap fiber with a given geometry supports sur...