The method of System Dynamics was used to study the dynamic change trend of many natural resources and environment in the Yellow River delta.
用系统动力学方法研究了黄河三角洲地区多种资源和环境的动态变化趋势。
CONCLUSION: multivariate random coefficients model can effectively analyze the dynamic change trend and random effects of multivariate repeated measures data in medical research.
结论：多变量随机系数模型可有效地进行多变量重复观测数据的动态变化趋势分析以及随机效应分析。
The current situation evaluation is to contrast the current water quality with the water quality standard, the dynamic evaluation can reflect the trend of water quality change.
现状评价是对比现状水质与标准之间的关系，而动态评价可反映水质变化的趋势。
By establishing mathematical models in the range, quantitative and spatial dynamic change, trend and state index of LUCC, the spatial-temporal characteristics of LUCC can be deeply studied.
通过建立研究区LUCC幅度、LUCC数量和空间变化模型以及趋势与状态指数模型，很好的表现了研究区LUCC的时空特征。
In the meantime, the dynamic stress-strain characteristics and the change trend in the direction of railway line of roadbed-culvert transition section are analyzed.
同时对路涵过渡段线路纵向上动应力-应变特征和变化趋势进行了分析。
The paper conducts a research on dynamic comprehensive evaluation of change speed from a view of considering state and trend of evaluated objects.
本文运用数学建模的手段，从综合考虑被评价对象变化速度状态与趋势的角度对变化速度进行动态综合评价研究。
Objective To reveal the trend of change incidence of hepatitis a (HAV) in Shandong province and explore dynamic analysis methods.
目的揭示山东省甲型病毒性肝炎(甲肝)发病趋势，探讨动态分析方法。
The dynamic changes are distinguished from the change quantity, mode, intensity, structure and trend.
土地利用动态变化在数量，方式，强度，结构和趋势等方面存在很大的差异。
The dynamic changes are distinguished from the change quantity, mode, intensity, structure and trend.
土地利用动态变化在数量，方式，强度，结构和趋势等方面存在很大的差异。
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