It has been proved that structure of food chain, immigration and emigration, environment noise can influence the pattern of complex population dynamics.
研究表明食物链的结构、种群的迁入和迁出、环境噪音都会对种群的复杂性动态特征产生影响。
A pet dog as industry is gradually formed breeding, scientific breeding, quality improvement, dog training, display competitions, dog food, dogs with, dog medicine, medical industry structure chain.
宠物犬作为产业正在逐渐形成良种繁育、科学饲养、品质改良、犬只的训练、展示比赛、犬粮、犬具、犬药、医疗的产业结构链。
Topological structure models of the supply chain in the food processing industry are studied from both static and dynamic aspects.
从静态和动态两方面研究了食品加工业供应链的拓扑结构模型； 研究了食品加工业供应链的体系结构；
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