2000年,美国数学家Stein提出了一个很一般的猜想:任何特殊多边形不可能划分为奇数个面积相等的三角形,并证明了猜想对边数不超过6......

In this paper,the basic equations of two-phase liquid metal flow in a magnetic field are de-rived,and specifically,two-p......

为解决塑料成品的二次加工而进行的应用性设计研究,采用经济型数控系统及其终端执行元件,参照金属切削机床设计,设定其总体方案和......

Ericson formula represents the first formula, which was suggested to describe the partial level density (PLD) formula in......