5.2 与密度有关的种群增长(density- dependent growth)模型 种群连续增长模型(continuous growth model) -"S"型增长曲线(Logistic equation): dN/dt=rN(1-N/K) K, 环境容纳量(Capacity) 最大持续常量=rK/4 (N=K/2)种群增长的"J"型和 "...
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研究了连续油管的工作力学特性，建立了连续油管弯曲、抗内压强度和外部挤毁压力、直径增长、纵向伸长及卡点位置分析计算模型。
Mechanical characteristic of ct is studied. The model of bending, internal pressure strength and external collapse strength, diametric growth and stuck-point of ct is established.
确定了环带球晶的形成机理，即间歇式增长过程，符合结构不连续模型。
The development of the ring-banded spherulites in PTT solution-cast film is a rhythmic growth process, and thus it is consistent with the structural discontinuity model.
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