反馈节点集FNS ？
Another reason is that when the user is creating a connection, the connection EditPart doesn't exist, so the node must be able to show feedback on its own.
另一个原因是，当用户创建连接时，连接EditPart是不存在的，因此节点必须能够自己显示反馈。
Aiming at the volatility of demand in the supply chain, the feedback controller was used to maintain product inventory of each node, so that the supply chain reached stabilization.
针对在供应链中需求的多变性，应用反馈控制器来维持所有节点的产品库存，以此达到供应链的稳定。
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