A geometric ray model for the propagation of light in a step fiber is presented, and the cut-off conditions are derived.

提出阶跃光纤导光的一种几何射线模型，方便地求出了截止条件，并与光波导理论所得结果作了比较。

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Based on the geometric characteristics of the zone, the allowable discharge amount and the cut-down amount were estimated by inversion method.

并利用污染带的几何特征参数反演推算了允许排污量和削减量。

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Metal and acrylic are used within her work and are translated into simple and clean-cut forms, in keep with the geometric and minimalistic style.

金属和有机玻璃通过杨秋羽的制作转换成简洁干净的形状，形成了几何造型和极简风格。

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Influenced by indigenous craft, the embroidery of Venetian courtiers who ruled the country beginning in 1489, and ancient Greek and Byzantine geometric patterns, Lefkara lace is made by hand in designs combining four basic elements: the hemstitch, cut work, satin stitch fillings and needlepoint edgings.

UNESCO: Culture