URL details: www.boracaytrips.com/articles/10.1186/s11782-020-00090-6

URL title: 五阶段系统的微观结构与动态过程:以COVID-19为一个复杂系统|中国商业研究前沿|全文世界杯直播在线直播 - 摩洛哥vs克罗地亚哪里买球
URL description: The research uses the development of COVID-19 in the human body as an example to explore the microstructures and dynamic processes of a concise complex system from the lens of the five-phase system. Based on the structural balance theory and system dynamics, the research finds that transitive triads and cyclic triads in the five-phase system are both imbalanced. The integration of these differentiated triads comprises of a balanced intermediate form in the shape of quadrangular cycles. These cycles serve as
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