Abstract: The present invention provides a 2-pyridone derivative having a structure represented by formula I, or a stereoisomer or pharmaceutically acceptable salt thereof. Activity experiment results show that the 2-pyridone derivative provided in the present invention has higher activity and selectivity, and can be used to treat thyroid hormone receptor-related diseases.

Abstract: A solid-state laser radar, including: a plurality of emission modules, each emission module including at least one light-emitting unit, and the light-emitting unit including a plurality of lasers configured to emit detection beams at the same time; and a receiving module, including at least one detection unit, the detection unit including a plurality of photodetectors configured to receive echoes, reflected by a target object, of the detection beams, the plurality of emission modules are disposed around the receiving module, the light-emitting units of the plurality of emission modules are located on a same plane, and one detection unit is configured to receive echoes, reflected by the target object, of the detection beams emitted by the light-emitting units of the plurality of emission modules. For a set range of field angles, the lengths of the light-emitting units emitting light simultaneously are greatly reduced by providing the plurality of emission modules.

Abstract: A railway vehicle with an aerodynamic lift control device is disclosed. An equipment compartment is formed between a vehicle body bottom plate at the bottom of a vehicle body and a passenger room floor, and the aerodynamic lift control device is provided in the equipment compartment; the aerodynamic lift control device comprises an aerodynamic lift regulation fan and aerodynamic lift air ducts, and an aerodynamic lift regulation air port located within the aerodynamic lift control range is formed in the vehicle body bottom plate; one end of each aerodynamic lift regulating air duct communicates with the aerodynamic lift regulation air port, and the other end communicates with the aerodynamic lift regulating fan; and the aerodynamic lift regulation fan changes the pressure distribution form of the bottom of the train by blowing positive pressure airflow or sucking negative pressure airflow.

Abstract: A railway vehicle with an aerodynamic lift control device is disclosed. An equipment compartment is formed between a vehicle body bottom plate at the bottom of a vehicle body and a passenger room floor, and the aerodynamic lift control device is provided in the equipment compartment the aerodynamic lift control device comprises an aerodynamic lift regulation fan and aerodynamic lift air ducts, and an aerodynamic lift regulation air port located within the aerodynamic lift control range is formed in the vehicle body bottom plate; one end of each aerodynamic lift regulating air duct communicates with the aerodynamic lift regulation air port, and the other end communicates with the aerodynamic lift regulating fan; and the aerodynamic lift regulation fan changes the pressure distribution form of the bottom of the train by blowing positive pressure airflow or sucking negative pressure airflow.

Abstract: A waste exhaust ventilation door automatic control device comprises a core body (8), an inner door body (2) and an outer door body (1); wherein the core body is fixed on a ventilation opening of the waste exhaust ventilation door, a top of the outer door body is movably hinged on an outer side of the core body, and a bottom of the inner door body is movably hinged on an inner side of the core body; when there is no pressure fluctuation outside the core body, the outer door body and inner door body will open, and when there is pressure fluctuation outside the core body, the outer door body and/or the inner door body will be closed automatically due to a pressure difference between inside and outside the core body. A vehicle body comprising the waste exhaust ventilation door automatic control device is also provided.

Abstract: The application relates to roof segments for constructing a roof of a carriage body for a rail vehicle for passenger transport, in particular for use in short-haul operation, such as underground and suburban trains, the rail vehicles or the train units formed by same must be accelerated and decelerated at short intervals. The roof segments are designed in the form of plates, shells or half-shells and consist of an outer wall and an inner wall at a distance to same. At least two roof segments are configured in such a way that the protruding region of the outer wall or inner wall of one roof segment is interlockingly, force-lockingly and/or integrally connected to the non-protruding region of the outer wall or inner wall of the neighbouring roof segment. The roof segments consist at least partially of a fibre-reinforced plastic composite.

Abstract: The disclosure provides a switch assembly and an electric drill. The switch assembly includes a first switch, a button, and a locking mechanism. The button is provided with a pressing part that cooperates with the first switch, so as to trigger the first switch when the button is pressed. The locking mechanism includes a locking member for locking the button and a trigger pivotally mounted and matched with the locking member. When the locking mechanism is locked, the locking member resists the button, so that the button cannot be pressed. When the trigger is rotated, the trigger drives the locking member to move, so that the locking member is misaligned with the button, and the button can be pressed at this time.

Abstract: A phase-change energy storage air duct of an automobile air conditioning system. A phase-change energy storage unit (2) is configured inside an air duct (1) of an air conditioning system. By means of phase-change heat absorption or release, residual heat in the air is absorbed, and the heat is released to air with a lower temperature, so that energy is recycled to achieve energy saving. The temperature of air entering a room or a carriage is kept stable, and thus the user experience is improved. When the air conditioning system fails, the phase-change energy storage unit (2) can still utilize stored cooling capacity or heat to cool down or heat up air in the air duct, so that a supply of air can be kept stable for a period of time, and thus the user experience is improved. The present application also relates to an automobile air conditioning system.

Abstract: The application relates to roof segments for constructing a roof of a carriage body for a rail vehicle for passenger transport, in particular for use in short-haul operation, such as underground and suburban trains, the rail vehicles or the train units formed by same must be accelerated and decelerated at short intervals. The roof segments are designed in the form of plates, shells or half-shells and consist of an outer wall and an inner wall at a distance to same. At least two roof segments are configured in such a way that the protruding region of the outer wall or inner wall of one roof segment is interlockingly, force-lockingly and/or integrally connected to the non-protruding region of the outer wall or inner wall of the neighbouring roof segment. The roof segments consist at least partially of a fibre-reinforced plastic composite.

Abstract: A system and method for suppressing serpentine instability of a railway vehicle, comprising a serpentine warning and control module for determining whether a bogie is in a state of serpentine instability; a traction motor speed control system for controlling a rotation speed of a traction motor according to a determination from the serpentine warning and control module; a signal output end of the serpentine warning and control module is connected with the traction motor speed control system. In the present disclosure, it extracts the serpentine characteristic wave from the transverse acceleration of the bogie and calculates the vibration non-linear index according to the extracted serpentine non-linear characteristic to judge whether the bogie is in a state of serpentine instability, and controls a direct torque of the traction system through the DTC control module.

Abstract: A vehicle body composite coating, comprising, in succession, a polyurethane finishing coat, a polyurethane intermediate layer, a polyester putty and a micro-arc oxidation ceramic layer undercoat, wherein the micro-arc oxidation ceramic layer undercoat is on an aluminium substrate of the vehicle body. The design method of the vehicle body composite coating includes establishment of a physical model, selection of an optimal thickness ratio, preparation of the vehicle body composite coating and an erosion test. The vehicle body composite coating enhances the binding force between the whole coating system and the aluminium alloy substrate, reduces the possibility of shedding of the coating as a whole, and improves the anti-erosion performance of the vehicle body composite coating.

Abstract: A waste exhaust ventilation door automatic control device comprises a core body (8), an inner door body (2) and an outer door body (1); wherein the core body is fixed on a ventilation opening of the waste exhaust ventilation door, a top of the outer door body is movably hinged on an outer side of the core body, and a bottom of the inner door body is movably hinged on an inner side of the core body; when there is no pressure fluctuation outside the core body, the outer door body and inner door body will open, and when there is pressure fluctuation outside the core body, the outer door body and/or the inner door body will be closed automatically due to a pressure difference between inside and outside the core body. A vehicle body comprising the waste exhaust ventilation door automatic control device is also provided.

Abstract: An inserted connection member for a train connector includes an insertion needle, an insulator, a disconnection preventing pad and an extrusion block. The insulator is sequentially provided with a positioning hole and an inserted connection hole in an axial direction. The insertion needle includes a line connecting segment, a positioning segment and an inserted connection segment which are connected sequentially, the line connecting segment and the positioning segment are arranged in the positioning hole. The disconnection preventing pad and the extrusion block are both sleeved on the line connecting segment, and the disconnection preventing pad includes a pad body and a boss arranged on the pad body. Thus, the insertion needle is ensured to maintain a stable contact even when the train is running at a high speed, and a disconnection preventing effect of the insertion needle is achieved.

Abstract: A device for testing a flow field state within a high-speed train bogie cabin; the periphery of a bogie consists of apron plates and end plates; the test device comprises: a plurality of test points evenly distributed on the inner walls of the apron plates and end plates, a plurality of image pickup devices installed in the bogie cabin, a smoke generator communicating with an inner cavity of the bogie via pipes, and one or more smoke exits provided on top of the bogie; each test point is connected to a test tape, and the distance between the test points is more than twice the test tape length. The test device monitors and records in real time the air flow direction at the end plates and apron plates by means of viewing of a fluorescent test tape. Also provided is a method of testing a flow field state within a high-speed train bogie cabin.

Abstract: A phase-change energy storage air duct of an automobile air conditioning system. A phase-change energy storage unit (2) is configured inside an air duct (1) of an air conditioning system. By means of phase-change heat absorption or release, residual heat in the air is absorbed, and the heat is released to air with a lower temperature, so that energy is recycled to achieve energy saving. The temperature of air entering a room or a carriage is kept stable, and thus the user experience is improved. When the air conditioning system fails, the phase-change energy storage unit (2) can still utilize stored cooling capacity or heat to cool down or heat up air in the air duct, so that a supply of air can be kept stable for a period of time, and thus the user experience is improved. The present application also relates to an automobile air conditioning system.

Abstract: A system and method for suppressing serpentine instability of a railway vehicle, comprising a serpentine warning and control module for determining whether a bogie is in a state of serpentine instability; a traction motor speed control system for controlling a rotation speed of a traction motor according to a determination from the serpentine warning and control module; a signal output end of the serpentine warning and control module is connected with the traction motor speed control system. In the present disclosure, it extracts the serpentine characteristic wave from the transverse acceleration of the bogie and calculates the vibration non-linear index according to the extracted serpentine non-linear characteristic to judge whether the bogie is in a state of serpentine instability, and controls a direct torque of the traction system through the DTC control module.

Abstract: An on-chip optical interconnection structure and network, where the on-chip optical interconnection structure includes M levels of optical switches, and mth-level optical switches in the M levels of optical switching devices include 2m-1 optical switches. Each optical switch in (i-1)th-level optical switches in the M levels of optical switches is coupled to two optical switches in ith-level optical switches. Two optical switches in the ith-level optical switches coupled to a same optical switch in the (i-1)th-level optical switches are coupled. The on-chip optical interconnection network is divided into levels, and switches coupled in a grid manner are formed such that hierarchical switching may be performed, and conflicts and delays in communication are reduced.

Abstract: A rail vehicle bogie traction device is provided, which includes a center pin and two traction rubber bag assemblies. Each of the traction rubber bag assemblies includes a traction rubber stack and a rubber bag, the rubber bag is filled with fluid, and a pressure of the rubber bag is settable. The traction rubber stack is connected to the rubber bag. The center pin is fixed on a lower surface of a vehicle body chassis bolster. Each of the two traction rubber bag assemblies has one end connected to the center pin, and another end connected to a cross beam of a rail vehicle frame. The rail vehicle bogie traction device has nonlinear characteristics, which may effectively transmit a longitudinal load, and may also prevent high-frequency vibration of the frame from transmitting to the vehicle chassis bolster and the vehicle body via the traction device.

Abstract: A welding clamping device includes a base plate and two positioning slide blocks, each of the positioning slide blocks includes a slide base and a cam, wherein the slide base includes a support plate and two cam holders fixed at two opposite ends of the support plate; the cam is rotatably mounted between the two cam holders via a camshaft for press-fitting a workpiece to be welded; and the base plate is provided with a slide slot, and the two positioning slide blocks are relatively slidably mounted in the slide slot. The device can better position a workpiece to be welded, improving welding quality; and clamping and unloading are easy and take a short time, improving welding efficiency.

Abstract: A system and method for testing a network-side harmonic component of a motor train unit, the method comprising: detecting a current of each power unit, sampling and quantifying the detected current, acquiring a digital current signal of each power unit, superimposing each digital current to obtain a current of the entire train, and acquiring a harmonic component according to the current of the entire train. A sample frequency is determined according to a frequency and a target phase angle error of the harmonic component to be detected. The provided system and method for testing the network-side harmonic component of the motor train unit improve a detection accuracy of harmonic current and can detect the harmonic component at a frequency above 3000 Hz.