基于混合Petri网的农业生产工作流建模研究

根据农业生产的实际工作,建构一个基于混合Petri网的工作流模型.混合Petri网一般由连续和离散两个部分组成,模型连续的部分主要反映农田实际工作的进程,离散部分主要表示农机和劳动力等资源状况的变化,提出的模型还可以模拟在生产过程中的工作和间歇状态.仿真结果表明,混合Petri网模型能准确地描述农业生产的过程,在出现不确定因素的情况下能重新分配资源.该模型作为农业生产规划的参考模型,促进在不确定的环境中相关优化算法的发展.

The research of modeling for work flow based on hybrid Petri nets in agricultural production

This research constructed an adequate model for practical farm workflow in agricultural production based on hybrid Petri nets.Hybrid Petri nets conventionally comprised with a continuous part and a discrete part.The continuous part models reflected the process of the practical work at the farmland,and the discrete part represented the status changes in resources such as machinery and labor.The proposed model also modeled the work status and undesirable breaks during the farming process.The simulated results revealed that the hybrid Petri nets model was promising for exactly describing the farming process and reallocating resources in the presence of uncertainties.The model served as a referential model for farm work planning and it promoted the development of a corresponding optimization algorithm under uncertain environments.