提出了一种数学模型来描述试验中沟宽的周期性形态变化。
A mathematical model was advanced to describe these changing patterns of rill width.
目的：观察拔毛诱导的小鼠毛发周期中毛囊间表皮lc及DETC的密度及形态变化，探讨二者与毛囊周期的关系。
Objective: To observe the dynamic changes in the density and morphology of Langerhans cells (LC) and dendritic epidermal t cells (DETC) in murine inter-follicular epidermis during hair follicle cycle.
构造活动改变地层的空间形态，同时产生周期性的应力震荡变化。油气作为储存在地层中的流体矿产，在运聚期明显要受到构造活动的影响。
An active tectonic movement changes the space shape of stratum and result in periodic stress concussion, which will influence hydrocarbon migration and accumulation as fluid deposit in stratum.
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