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。
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.
对专项运动内在、微观和动态的细节变化进行深入了解和认识，是当前探索和研究专项特征的主要发展趋势。
The cognition on internal microcosmic and dynamic detailed variation of specific sport event is the main developing trend of studying and researching specific characteristic.
目的了解1990 ~ 1999年湖南省安仁县出生缺陷发病率的动态变化趋势及流行病学特征。
Objective To study the variation trend on the incidence and epidemiological characteristics of birth defects during the period from 1990 through 1999 in Anren County.
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