The dynamic knowledge model with temporal and spatial characters for cotton management includes three modules as pre-sowing plan design, dynamic development indices, diagnosis and regulation.
具有时空适应性的棉花栽培管理动态知识模型主要包括播前方案设计、生育指标动态和苗情诊断调控知识模型三个部分。
The conceptual modeling elements and mutual relations between them are discussed and some key technical problems are identified in the development of feature based temporal - spatial data models.
讨论了基于特征的概念模型要素及相互关系；提出了基于特征的时空数据模型所面临的关键技术。
Result: BSP and OPN have different temporal and spatial distribution mode during mouse tooth germ development.
结果：BSP、OPN在牙胚发育中的时空分布模式存在差异。
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