Abstract: A control method includes in response to a mode switch operation of a user, switching to a first control mode or a second control mode, in response to a position adjustment of an operation member of a control terminal, adjusting a position or an attitude of an aerial vehicle in a control direction corresponding to the operation member, in the first control mode, in response to the operation member being at a preset first initial position, controlling the aerial vehicle to maintain the position or the attitude unchanged in the control direction, and in the second control mode, in response to the aerial vehicle being in an initial status in the control direction and the operation member being in a preset second initial position different from the first initial position, controlling the aerial vehicle to maintain the position or the attitude unchanged in the control direction.

Abstract: Provided are a road traffic incident detection method, system and device based on small sample learning. According to the invention, traffic flow data and incident data are utilized to construct non-incident samples by a case contrast study method, traffic flow feature indexes are extracted to construct incident and non-incident sample feature sets, then sample division and pairing are performed on the feature sets to obtain training and test sample pair sets, a traffic incident detection model is constructed by adopting a twin network architecture in small sample learning, and the model is trained and tested by a sample pair mode. The invention is conductive to accurately detecting accidental traffic incidents, and providing supports for avoiding secondary accidents and improving the traffic safety level.

Abstract: A distributed structure of a movable platform and a movable platform are provided. The movable platform includes: a platform body, a driving part, a plurality of signal modules divided into at least two groups, where each group of the signal modules is concentrated in one area; at least two control modules, where each control module is arranged in the area where a corresponding group of the signal modules is located, and each control module can directly obtain signals of the corresponding group of the signal modules in its area; and an signal transmission device, which is provided between the control modules and is configured to transmit signals between the control modules.

Abstract: A control method includes in response to a mode switch operation of a user, switching to a first control mode or a second control mode, in response to a position adjustment of an operation member of a control terminal, adjusting a position or an attitude of an aerial vehicle in a control direction corresponding to the operation member, in the first control mode, in response to the operation member being at a preset first initial position, controlling the aerial vehicle to maintain the position or the attitude unchanged in the control direction, and in the second control mode, in response to the aerial vehicle being in an initial status in the control direction and the operation member being in a preset second initial position different from the first initial position, controlling the aerial vehicle to maintain the position or the attitude unchanged in the control direction.

Abstract: Protection circuitry configured to protect an electrical load from both overvoltage and overcurrent and includes a recovery period timer configured to set a recovery time. The recovery time allows a system, including a power supply, voltage regulator, protection circuitry and electrical load to dissipate heat and reset components. The protection circuitry is configured to monitor downstream performance of the electrical load and disconnect upstream power based on a downstream failure or other performance characteristics. The protection circuitry may include a downstream overvoltage sensing circuit that controls a current source. The current source injects current into an overcurrent protection loop in the protection circuitry that includes the configurable recovery period timer. In this manner both an overvoltage and an overcurrent event may take advantage of the configurable recovery period timer without the need for a separate time delay circuit.

Abstract: Protection circuitry configured to protect an electrical load from both overvoltage and overcurrent and includes a recovery period timer configured to set a recovery time. The recovery time allows a system, including a power supply, voltage regulator, protection circuitry and electrical load to dissipate heat and reset components. The protection circuitry is configured to monitor downstream performance of the electrical load and disconnect upstream power based on a downstream failure or other performance characteristics. The protection circuitry may include a downstream overvoltage sensing circuit that controls a current source. The current source injects current into an overcurrent protection loop in the protection circuitry that includes the configurable recovery period timer. In this manner both an overvoltage and an overcurrent event may take advantage of the configurable recovery period timer without the need for a separate time delay circuit.

Abstract: A hydraulic gentle vibration speed-enhancing drilling tool has an upper joint, a power assembly, a flow regulating valve assembly and a force transmission assembly. The upper end of an outer shell of the power assembly is in threaded connection with the upper joint of the drilling tool, at the lower end thereof, internal steps having outer octagonal structure are arranged to limit the lower joint; a middle section of the lower joint is of outer octagonal structure, with the lower end in threaded connection with an adapter; and the power assembly is of turbine set structure or screw-type mud motor structure for producing driving force under the action of hydraulic force and driving an upper rotating shaft. The upper rotating shaft is arranged on a load bearing ring, and the lower end thereof is in threaded connection with a lower rotating shaft.

Abstract: A hydraulic gentle vibration speed-enhancing drilling tool has an upper joint, a power assembly, a flow regulating valve assembly and a force transmission assembly. The upper end of an outer shell of the power assembly is in threaded connection with the upper joint of the drilling tool, at the lower end thereof, internal steps having outer octagonal structure are arranged to limit the lower joint; a middle section of the lower joint is of outer octagonal structure, with the lower end in threaded connection with an adapter; and the power assembly is of turbine set structure or screw-type mud motor structure for producing driving force under the action of hydraulic force and driving an upper rotating shaft. The upper rotating shaft is arranged on a load bearing ring, and the lower end thereof is in threaded connection with a lower rotating shaft.

Abstract: Disclosed is a large-scale submersible sewage pump assembly that includes a pump and a pump seat installation structure, wherein the pump seat installation structure has a concrete installation base layer, and a pump seat for installing the pump. The pump seat is fixed to the pump installation layer, and the bottom of the pump is directly connected onto the pump seat. The pump has a motor cooling apparatus, wherein the cooling apparatus has an internal cooling apparatus installed inside the case of the motor, and an external cooling apparatus installed outside the motor. The pump seat installation structure can stably mount and support the large-scale submersible sewage pump, preventing potential safety hazard during running of the pump.

Abstract: Disclosed is a large-scale submersible sewage pump, comprising a pump and a pump seat installation structure, wherein the pump seat installation structure comprises a concrete installation base layer, and a pump seat for installing the pump. The pump seat is fixed to the pump installation layer, and the bottom of the pump is directly connected onto the pump seat. The pump comprises a motor cooling apparatus, wherein the cooling apparatus comprises an internal cooling apparatus installed inside the case of the motor, and an external cooling apparatus installed outside the motor. The pump seat installation structure can stably mount and support the large-scale submersible sewage pump, preventing potential safety hazard during running of the pump.