Abstract: A fertilization precision control method for water and fertilizer integrated equipment and a control system thereof includes the following steps: step S1, establishing a fertilization precision control model of the water and fertilizer integrated equipment; and step S2, solving an optimal solution of the fertilization precision control model by adopting estimation of distribution algorithms.

Abstract: The invention relates to organic electroluminescent devices, and discloses a phosphorescence device containing heterocyclic phosphoric acid metal complexes. The phosphorescence device provided by the invention contains metal complexes of heterocyclic phosphoric acid auxiliary ligands, and the glass transition temperature of the hole transport material of phosphorescence device is not lower than 85° C. Because a hole transport material with high vitrification temperature is used, the device provided by the invention can overcome the instability of the device and the adverse effect on the service life of the device when the glass transition temperature of the working device when the ambient temperature is above 30-40° C. and the working device temperature is close to that of the hole transport material. Compared with the devices based on FIrpic and TAPC, the phosphorescence device provided by the invention not only has higher device efficiency, but also has better high temperature stability.

Abstract: The present invention relates to a fertilization precision control method for water and fertilizer integrated equipment and a control system thereof. The method comprises the following steps: step S1, establishing a fertilization precision control model of the water and fertilizer integrated equipment; and step S2, solving an optimal solution of the fertilization precision control model by adopting estimation of distribution algorithms.