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设计蝶形多模干涉(MMI)耦合器时,需要根据所要求的功率分割比率确定器件的结构参量。作为矩形多模干涉耦合器的特征参量的耦合长度......
传说早在两千多年前，罗马的宫廷贵族在观看斗兽表演时，就开始使用有色宝石遮挡眼部，以减弱光线的刺激，这也许就是太阳镜的雏形。直到近......
【Abstract】Romeo and Juliet is one of the most famous dramas of William Shakespeare. I like the novel very much and wil......
因為丑陋的外表，出生不久的丑小鸭被赶出养鸭场，被迫离开家园。一位好心的老奶奶收留了无家可归的丑小鸭。接下来，他的命运会好转吗？请......
Many biological surface are hydrophobic because of their complicated composition and surface microstructure. Eleven spec......
记述花弄蝶亚科Pyrginac一中国新纪录属、种,即卡弄蝶属Carcharodus、花卡弄蝶C.flocciferus(Zeller,1847),提供了成虫外形照片及......
