The inviscid linear stability of variable density swirling jets is analyzed by normal mode method.用正则模方法研究了变密度无粘旋拧射流线性稳定性特征.And accoutrements of rhythmic gymnastics - the hoop, the swirling ribbon - divert from the balle...
Widespread epidemics in birds increase opportunities for human exposure.禽类中的广泛流行增加了人类暴露的机会.The epidemics usually stop when the summer rainy season begins.时疫通常在夏季雨季开始时停止传播....the protection of mankind against the forces o...
This paper introduces a rarely seen method of describing with diametral distance.本文介绍了一种鲜为人知的用直径距离描绘椭圆的方法.Meshing spur gears must have the same diametral pitch.互相啮合的直齿圆柱齿轮,必须具有相同的径节.Diametral pitch : the number of teeth ...