this paper advances a direct observational method to determine two principal planes corresponding with two principal stresses belng simple and obvious, this method ean be mastered easily.
本文提出关于平面应力状态单元体上两个主平面与两个主应力对应关系的直观判断方法。
prescription event monitoring (pem) is a non-interventional observational method of adverse drug reaction monitoring, which was established first in england in 1981.
处方事件监测用非干预性、观察性药品不良反应监测方法,1981年在英国最早开展。
with the observational method (sometimes referred to as field observation) animal and human behavior is closely observed.
通过观察法(有时也称为现场勘察),研究者能够紧密观察人类以及动物的行为。