Abstract: Provided are a frequency band scheduling method, a communication node, and a computer-readable storage medium. The method includes that: a reference frequency band and at least one detection frequency band are acquired, where the reference frequency band is a frequency band in which a first system does not interfere with a second system, and the at least one detection frequency band is a frequency band in which the first system and the second system interfere with each other; frequency band configuration information is sent to a terminal device, where the frequency band configuration information includes configuration information of the reference frequency band and configuration information of all detection frequency bands; frequency band measurement information that the terminal device sends according to the frequency band configuration information is received.

Abstract: Determining an active jacking force of a tunneling closely undercrossing existing station, includes: acquiring design parameters of stations, and geological parameters of a construction site; obtaining a stress solution expression of the active jacking force on the existing station to obtain a stress solution of any point in a semi-infinite space under the action of a vertical load, replacing the vertical load with a vertical load acting on the existing station, and obtain a vertical stress solution of the existing station; obtaining a relational expression between the deflection and the stress solution of the existing station; and substituting the stress solution expression of the active jacking force into the relational expression between the deflection and the stress solution of the existing station according to boundary conditions at both ends of a beam on elastic foundation to obtain the active jacking force that controls the deflection of the existing station.

Abstract: Determining an active jacking force of a tunneling closely undercrossing existing station, includes: acquiring design parameters of stations, and geological parameters of a construction site; obtaining a stress solution expression of the active jacking force on the existing station to obtain a stress solution of any point in a semi-infinite space under the action of a vertical load, replacing the vertical load with a vertical load acting on the existing station, and obtain a vertical stress solution of the existing station; obtaining a relational expression between the deflection and the stress solution of the existing station; and substituting the stress solution expression of the active jacking force into the relational expression between the deflection and the stress solution of the existing station according to boundary conditions at both ends of a beam on elastic foundation to obtain the active jacking force that controls the deflection of the existing station.

Abstract: The present disclosure provides a tidal simulation test device and a method of use thereof. The tidal simulation test device includes a water supply pool, a water level adjustment pool, a subtidal zone simulation pool, an intertidal zone simulation pool, a supratidal zone simulation pool and a two-way water flow adjustment control box. The two-way water flow adjustment control box is provided therein with an electromagnetic flow control meter, a forward frequency conversion self-priming pump, a reverse frequency conversion self-priming pump and an intelligent time-controlled three-way controller. In the method, the start and stop of the forward frequency conversion self-priming pump and the reverse frequency conversion self-priming pump are controlled through an intelligent switch, and a water flow is adjusted through the electromagnetic flow control meter, thereby realizing periodic changes in a water level to simulate different types of tides and coastal wetlands.

Abstract: The present disclosure provides a tidal simulation test device and a method of use thereof. The tidal simulation test device includes a water supply pool, a water level adjustment pool, a subtidal zone simulation pool, an intertidal zone simulation pool, a supratidal zone simulation pool and a two-way water flow adjustment control box. The two-way water flow adjustment control box is provided therein with an electromagnetic flow control meter, a forward frequency conversion self-priming pump, a reverse frequency conversion self-priming pump and an intelligent time-controlled three-way controller. In the method, the start and stop of the forward frequency conversion self-priming pump and the reverse frequency conversion self-priming pump are controlled through an intelligent switch, and a water flow is adjusted through the electromagnetic flow control meter, thereby realizing periodic changes in a water level to simulate different types of tides and coastal wetlands.

Abstract: The present invention relates to a transformer-free LED lighting device using the AC power from city electricity directly, which comprises a coupling capacitor, a bridge rectifier circuit and a current limiting resistor, wherein, there is a current limiting resistor cascading between the first input end of the bridge rectifier circuit and the first leading-in end of the electrical source of the AC power from city electricity, there is a coupling capacitor cascading between the second input end of the bridge rectifier circuit and the second leading-in end of the electrical source of the AC power from city electricity, there is a LED tube connecting between two output ends of the bridge rectifier circuit. The transformer-free LED lighting device using the AC power from city electricity directly. This invention shall simplify the circuit structure and reduce production cost for LED lighting devices. It is catered for the mass-production.