Xu Dan

TL;DR: The results of simulations performed using the proposed robust MPC strategy for greenhouse temperature systems show that the controller can effectively achieve the set point in the presence of disturbances and that it offers more suitable control variables, higher control precision, and stronger robustness than the conventional MPC.

TL;DR: In this article, a treatment method, a treatment device and a treatment system for temperature control and energy conservation is presented, which considers the greenhouse temperature and the energy loss in the controlling process of the control devices.

TL;DR: A general framework for an integral sliding mode controller based on a disturbance observer combined with feedback linearization for a greenhouse temperature and humidity system is presented and can be applied to improve greenhouse climate control systems.

TL;DR: In this paper, a greenhouse temperature and humidity decoupling control method and system is presented, which considers the strong coupling characteristic of greenhouse temperature in the control process and provides a PID (proportional integral derivative) controller based on the equivalent integral and time delay systems.

TL;DR: In this article, a method and system for detecting nitrate nitrogen in farmland based on ion selectivity electrodes was proposed, which comprises the steps that first response potential and second response potential of different concentrations of standard sample solutions at different temperatures are detected; according to the first response potentially and the second potential response of the to-be-detected soil extract in farmland ambient temperatures, the nitrate ion concentration of the soil extract was calculated by utilizing the detection model; and according to this nitrate content in soil to be detected is determined according to a built detection model, the effect