Abstract: A lubricator control method includes reading current configuration information including periodic oil filling time and periodic reporting time, controlling a lubricator to wake up from a sleep state to perform an oil filling task when the periodic oil filling time is reached, controlling the lubricator to switch to the sleep state after the oil filling task ends normally or an abnormal alarm is provided, controlling the lubricator to wake up from the sleep state to perform a data reporting task through a wireless network when the periodic reporting time is reached, controlling the lubricator to switch to the sleep state after the data reporting task is completed.

Abstract: A lubricator control system includes a lubricator, an Internet-of-things platform, and an application server. The lubricator is configured to communicate with the application server in a long-distance and low-power consumption wireless communication mode, the lubricator is configured to communicate with the Internet-of-things platform via 5G-NB-IoT communication and to send target information to the Internet-of-things platform in the long-distance and low-power consumption wireless communication mode, and the Internet-of-things platform is configured to send the target information to the application server. In addition, the application server is configured to receive the target information and to send corresponding target response information to the Internet-of-things platform, and the Internet-of-things platform is configured to send the target response information to the lubricator via 5G-NB-IoT communication in the long-distance and low-power consumption wireless communication mode.

Abstract: A ZnSe quantum dot, a display device, and a method for preparing the ZnSe quantum dot are provided. A fluorescence emission peak of the ZnSe quantum dot is in a range of 455 nm to 470 nm, and a full width at half maximum of fluorescence of the ZnSe quantum dot is less than 30 nm.

Abstract: An intrinsically safe single-point lubricator includes a reservoir unit configured to store a lubricant, a pumping mechanism in the reservoir unit, and a drive unit housing an electric motor and a battery pack and being detachably connected to the reservoir unit and configured to drive the pumping mechanism to force the lubricant out of a lubricant outlet in the reservoir unit.

Abstract: An energizing test device includes a support body having a shape and at least one test electrode mounted in the support body and configured to provide a test voltage to an electrical device under test. The electrical device under test includes a battery compartment configured to receive a battery pack, the battery compartment having a shape and having a voltage input terminal configured to introduce electric voltage into a working circuit of the electrical device under test. The support body is configured such that the support body is insertable into the battery compartment such that the at least one test electrode contacts the voltage input terminal. Also an assembly of the test device and the electrical device under test.

Abstract: A method for preparing a quantum dot, a quantum dot, and a display device, are provided. The method includes the following steps: providing a first precursor solution, a second precursor solution, a first selenium precursor solution, and a second selenium precursor solution with a lower reaction activity than the first selenium precursor solution; adding the first selenium precursor solution to the second precursor solution to form an intermediate of the quantum dot; performing the following step at least once to form the quantum dot: adding the first precursor solution and the second selenium precursor solution to the intermediate of the quantum dot and making them react.

Abstract: A method for preparing a ZnSe quantum dot, a ZnSe quantum dot, a ZnSe structure and a display device are provided. The method includes preparing a first zinc precursor solution, a second zinc precursor solution, a first selenium precursor solution, and a second selenium precursor solution with a lower reaction activity than the first selenium precursor solution, adding the first selenium precursor solution to the second zinc precursor solution to form an intermediate of the ZnSe quantum dot, performing the following operation at least once to form the ZnSe quantum dot: sequentially adding the first zinc precursor solution and the second selenium precursor solution to the intermediate of the ZnSe quantum dot and making the first zinc precursor solution, the second selenium precursor solution, and the intermediate of the ZnSe quantum dot react.

Abstract: A method for preparing a quantum dot, a quantum dot, and a display device, are provided. The method includes, providing a first precursor solution, a second precursor solution, a first selenium precursor solution, and a second selenium precursor solution with a lower reaction activity than the first selenium precursor solution, adding the first selenium precursor solution to the second precursor solution to form an intermediate of the quantum dot, performing the following operation at least once to form the quantum dot: without cleaning the intermediate of the quantum dot, adding the first precursor solution and the second selenium precursor solution to the intermediate of the quantum dot, and making the first precursor solution, the second selenium precursor solution, and the intermediate of the quantum dot react.

Abstract: A lubricator control system includes a lubricator, a LoRa gateway, an Internet of Things platform and an application server. The lubricator is configured to communicate with the application server in a long-distance and low-power consumption wireless communication mode and to communicate with the Internet of Things platform based on a LoRaWan communication protocol and to send target information to the LoRa gateway. The LoRa gateway is configured to forward the target information to the Internet of Things platform, and the Internet of Things platform is configured to send the target information to the application server. The application server is configured to receive the target information and to send corresponding target response information to the Internet of Things platform. The Internet of Things platform is configured to send the target response information to the LoRa gateway, and the LoRa gateway is configured to forward the target response information to the lubricator.

Abstract: A lubricator control system includes a lubricator, an Internet-of-things platform, and an application server. The lubricator is configured to communicate with the application server in a long-distance and low-power consumption wireless communication mode, the lubricator is configured to communicate with the Internet-of-things platform via 5G-NB-IoT communication and to send target information to the Internet-of-things platform in the long-distance and low-power consumption wireless communication mode, and the Internet-of-things platform is configured to send the target information to the application server. In addition, the application server is configured to receive the target information and to send corresponding target response information to the Internet-of-things platform, and the Internet-of-things platform is configured to send the target response information to the lubricator via 5G-NB-IoT communication in the long-distance and low-power consumption wireless communication mode.

Abstract: A lubricator control method includes reading current configuration information including periodic oil filling time and periodic reporting time, controlling a lubricator to wake up from a sleep state to perform an oil filling task when the periodic oil filling time is reached, controlling the lubricator to switch to the sleep state after the oil filling task ends normally or an abnormal alarm is provided, controlling the lubricator to wake up from the sleep state to perform a data reporting task through a wireless network when the periodic reporting time is reached, controlling the lubricator to switch to the sleep state after the data reporting task is completed.

Abstract: A method for preparing a ZnSe quantum dot, a ZnSe quantum dot, a ZnSe structure and a display device are provided. The method includes preparing a first zinc precursor solution, a second zinc precursor solution, a first selenium precursor solution, and a second selenium precursor solution with a lower reaction activity than the first selenium precursor solution, adding the first selenium precursor solution to the second zinc precursor solution to form an intermediate of the ZnSe quantum dot, performing the following operation at least once to form the ZnSe quantum dot: sequentially adding the first zinc precursor solution and the second selenium precursor solution to the intermediate of the ZnSe quantum dot and making the first zinc precursor solution, the second selenium precursor solution, and the intermediate of the ZnSe quantum dot react.

Abstract: A method for preparing a quantum dot, a quantum dot, and a display device, are provided. The method includes the following steps: providing a first precursor solution, a second precursor solution, a first selenium precursor solution, and a second selenium precursor solution with a lower reaction activity than the first selenium precursor solution; adding the first selenium precursor solution to the second precursor solution to form an intermediate of the quantum dot; performing the following step at least once to form the quantum dot: adding the first precursor solution and the second selenium precursor solution to the intermediate of the quantum dot and making them react.