Abstract: A cultivation method based on an optimization of a plant nitrogen fertilizer disclosure amount includes: selecting plants to be planted in this batch, recording a number of the plants planted this time, and preparing different parts of nitrogen fertilizer for individual plants, each part of the nitrogen fertilizer being 10 g; and planting the same batch of plants every Monday with an interval of one week and fertilizing the planted plants in the second week after planting. According to the cultivation method based on the optimization of the plant nitrogen fertilizer disclosure amount, by adopting a mode of more tests and less planting, consumed plant seedlings are correspondingly reduced when a worker calculates an optimal fertilizer disclosure amount, thus effectively avoiding excessive waste, making a cost of a subsequent use cheaper, bringing a help to a whole experiment, and enabling people to use the method more conveniently.

Abstract: A cultivation method based on an optimization of a plant nitrogen fertilizer disclosure amount includes: selecting plants to be planted in this batch, recording a number of the plants planted this time, and preparing different parts of nitrogen fertilizer for individual plants, each part of the nitrogen fertilizer being 10 g; and planting the same batch of plants every Monday with an interval of one week and fertilizing the planted plants in the second week after planting. According to the cultivation method based on the optimization of the plant nitrogen fertilizer disclosure amount, by adopting a mode of more tests and less planting, consumed plant seedlings are correspondingly reduced when a worker calculates an optimal fertilizer disclosure amount, thus effectively avoiding excessive waste, making a cost of a subsequent use cheaper, bringing a help to a whole experiment, and enabling people to use the method more conveniently.

Abstract: A control method and a control system are provided. A valve closing position of a valve device can be controlled according to the current flow direction or working mode of a refrigerant. A stroke of the valve device from a fully-opened position to a fully-closed position is defined as a total valve closing stroke. When the flow direction of the refrigerant is a forward direction, the valve device is controlled to operate at a first valve closing position, and when the flow direction of the refrigerant is a reverse direction, the valve device is controlled to operate at a second valve closing position. The first valve closing position is different from the second valve closing position, such that wear caused by valve closing can be reduced.

Abstract: A control method and a control system, by which a motor can be controlled. The control system includes a central processing module and a drive control module. In a period in which a voltage is not applied to any phase coil of the motor, the drive control module collects voltages of the coil to which the voltage is not applied, and converts the voltages of the coil into digital signals. The central processing module reads the digital signals and determines whether the running speed of the motor is consistent with a preset speed depending on whether an average value of the digital signals falls within a preset threshold range, which helps to improve the control precision.

Abstract: A control system and a control method, used for controlling a motor. The control system includes a central processing module and a drive control module. In a period in which a voltage is not applied to any phase coil of the motor, the drive control module collects voltages of the phase coil, converts the voltages of the coil into digital signals and stores the digital signals. The central processing module reads the digital signals from the drive control module, accumulates the digital signals to obtain an accumulated value, and determines the operating condition of the motor according to a relationship between the accumulated value and a preset threshold, thereby improving the reliability of the motor control.

Abstract: A control method and a control system, by which a motor can be controlled. The control system includes a central processing module and a drive control module. In a period in which a voltage is not applied to any phase coil of the motor, the drive control module collects voltages of the coil to which the voltage is not applied, and converts the voltages of the coil into digital signals. The central processing module reads the digital signals and determines whether the running speed of the motor is consistent with a preset speed depending on whether an average value of the digital signals falls within a preset threshold range, which helps to improve the control precision.

Abstract: A control method and a control system are provided. A valve closing position of a valve device can be controlled according to the current flow direction or working mode of a refrigerant. A stroke of the valve device from a fully-opened position to a fully-closed position is defined as a total valve closing stroke. When the flow direction of the refrigerant is a forward direction, the valve device is controlled to operate at a first valve closing position, and when the flow direction of the refrigerant is a reverse direction, the valve device is controlled to operate at a second valve closing position. The first valve closing position is different from the second valve closing position, such that wear caused by valve closing can be reduced.

Abstract: A control system and a control method, used for controlling a motor. The control system includes a central processing module and a drive control module. In a period in which a voltage is not applied to any phase coil of the motor, the drive control module collects voltages of the phase coil, converts the voltages of the coil into digital signals and stores the digital signals. The central processing module reads the digital signals from the drive control module, accumulates the digital signals to obtain an accumulated value, and determines the operating condition of the motor according to a relationship between the accumulated value and a preset threshold, thereby improving the reliability of the motor control.