Abstract: The present invention provides a deep learning-based natural language understanding method and an intelligent teaching assistant system. First, it involves constructing a knowledge database and a question database, where learning material documents are saved into the knowledge database and preprocessed natural language information is saved into the question database. The method then involves learning and understanding the natural language information in the question database, searching for related knowledge points in the knowledge database based on the understood content, selecting the best-matched learning materials corresponding to these knowledge points as samples to respond to the natural language information, and generating a record that includes the question, response, and evaluation, which is saved into the knowledge database. Finally, it generates multiple forms of responses and outputs them according to the corresponding requirements.

Abstract: A magnetic confinement fusion reactor includes a host hall, and a host including a Dewar system, a cold shield system, a superconducting magnet system, a vacuum chamber system, a divertor system, a blanket system, a remote operation system, and a maintenance system. The superconducting magnet system includes a central solenoid magnet, a poloidal field magnet, and a toroidal field magnet. The central solenoid magnet is configured to provide necessary volt-seconds. The poloidal field magnet is configured to generate a poloidal magnetic field. The toroidal field magnet is configured to generate a toroidal magnetic field. The plasma is confined by the toroidal magnetic field and the poloidal magnetic field. The vacuum chamber system is provided with a neutron shielding block to protect the superconducting magnets from being damaged by fusion neutrons.

Abstract: A speaker diaphragm includes a diaphragm main body and a composite layer. The diaphragm main body includes a fixing portion, an annular portion and a central portion. The annular portion is connected to the fixing portion. The central portion is connected to the annular portion. The composite layer includes a composite fixing portion and a composite bent portion connected to the composite fixing portion. The composite fixing portion is bonded and fixed to the fixing portion. The composite bent portion is bonded and fixed to at least part of the annular portion. The speaker diaphragm of the present disclosure is beneficial to reduce the rocking vibration. A speaker having the speaker diaphragm is also disclosed.

Abstract: The present disclosure provides a lamp mounting structure and a lamp, and the lamp mounting structure includes a mounting assembly, a connection assembly and a chassis assembly, the mounting assembly is fixedly mounted on a mounting wall, the chassis assembly is fixedly connected with a lamp main body, the connection assembly includes a first connection assembly and a second connection assembly, two ends of the first connection assembly are rotatably connected with the mounting assembly and the chassis assembly, and a first lock catch part is provided on the mounting assembly, at least one second lock catch part is provided at a position, corresponding to the first lock catch part, of the chassis assembly, and the first lock catch part and the second lock catch part are in a lock catch connection.

Abstract: A magnetic confinement fusion reactor includes a host hall, and a host including a Dewar system, a cold shield system, a superconducting magnet system, a vacuum chamber system, a divertor system, a blanket system, a remote operation system, and a maintenance system. The superconducting magnet system includes a central solenoid magnet, a poloidal field magnet, and a toroidal field magnet. The central solenoid magnet is configured to provide necessary volt-seconds. The poloidal field magnet is configured to generate a poloidal magnetic field. The toroidal field magnet is configured to generate a toroidal magnetic field. The plasma is confined by the toroidal magnetic field and the poloidal magnetic field. The vacuum chamber system is provided with a neutron shielding block to protect the superconducting magnets from being damaged by fusion neutrons.

Abstract: Provided in the present disclosure are a lamp mounting structure and a lamp. The lamp mounting structure is used for assembling the lamp on a mounting wall and comprises: a mounting assembly, a connecting assembly and a base plate assembly, wherein the mounting assembly is fixedly installed on the mounting wall, and the base plate assembly is fixedly connected to a lamp main body of the lamp; the mounting assembly, the connecting assembly and the base plate assembly are rotatably connected end-to-end in sequence to form a Z-shaped structure; and a first lock catch part is arranged on the mounting assembly, at least one second lock catch part is arranged in a position, corresponding to the first lock catch part, of the base plate assembly, and the first lock catch part is connected to the second lock catch part in a lock catch manner.

Abstract: The present disclosure provides a lamp mounting structure and a lamp, and the lamp mounting structure includes a mounting assembly, a connection assembly and a chassis assembly, the mounting assembly is fixedly mounted on a mounting wall, the chassis assembly is fixedly connected with a lamp main body, the connection assembly includes a first connection assembly and a second connection assembly, two ends of the first connection assembly are rotatably connected with the mounting assembly and the chassis assembly, and a first lock catch part is provided on the mounting assembly, at least one second lock catch part is provided at a position, corresponding to the first lock catch part, of the chassis assembly, and the first lock catch part and the second lock catch part are in a lock catch connection.

Abstract: The present invention provides text-based news significance evaluation methods, apparatuses, and electronic devices for improving efficiency and accuracy of news significance evaluation, and implementing real-time dynamic evaluation on text news. The method comprises: reading text news; preprocessing the text news to obtain original data; extracting feature values from the original data, which comprises metadata, a keyword, and a probability model feature value; and obtaining a score of each feature value according to a weight ratio corresponding to each feature value. The apparatus comprises: a text news reading module, a text news preprocessing module, a feature value extraction module, a feature value weight determining module, and a text news significance evaluation module. The electronic device comprises a memory and a processor. The memory stores a computer program that can run on the processor.

Abstract: An optimization method, apparatus, computer device and storage medium for engine model. The method includes: setting an initial population according to a predetermined number of solutions; obtaining a first output set of the initial population on the engine model; determining a first fitness value; operating selection, crossover, and mutation on the initial population according to the first fitness value to obtain an evolved population, and the initial population and the evolved population constitute a to-be-selected population; obtaining a second output set of the evolved population on the engine model; determining a second fitness value; selecting engine model parameters in the to-be-selected population to form a new population according to the second fitness value; and optimizing the engine model by using the engine model parameters in the new population if a termination condition is met.

Abstract: A rigid-flexible coupled unmanned aerial vehicle (UAV) morphing wing and an additive manufacturing method thereof are disclosed. A shape memory alloy (SMA) strip/wire for controlling the wing upward deformation and an SMA strip/wire for controlling the wing downward deformation are arranged alternately, and a plurality of reinforcing ribs are arranged at intervals on the SMA strips/wires for controlling the wing upward deformation and the SMA strips/wires for controlling the wing downward deformation. The SMA strips/wires for controlling the wing upward deformation and the SMA strips/wires for controlling the wing downward deformation are arranged on a flexible substrate, and are wrapped with an insulating covering. The SMA strips/wires for controlling the wing upward deformation and the SMA strips/wires for controlling the wing downward deformation each are provided with an electric heating element.

Abstract: An optimization method, apparatus, computer device and storage medium for engine model. The method includes: setting an initial population according to a predetermined number of solutions; obtaining a first output set of the initial population on the engine model; determining a first fitness value; operating selection, crossover, and mutation on the initial population according to the first fitness value to obtain an evolved population, and the initial population and the evolved population constitute a to-be-selected population; obtaining a second output set of the evolved population on the engine model; determining a second fitness value; selecting engine model parameters in the to-be-selected population to form a new population according to the second fitness value; and optimizing the engine model by using the engine model parameters in the new population if a termination condition is met.

Abstract: The present invention provides text-based news significance evaluation methods, apparatuses, and electronic devices for improving efficiency and accuracy of news significance evaluation, and implementing real-time dynamic evaluation on text news. The method comprises: reading text news; preprocessing the text news to obtain original data; extracting feature values from the original data, which comprises metadata, a keyword, and a probability model feature value; and obtaining a score of each feature value according to a weight ratio corresponding to each feature value. The apparatus comprises: a text news reading module, a text news preprocessing module, a feature value extraction module, a feature value weight determining module, and a text news significance evaluation module. The electronic device comprises a memory and a processor. The memory stores a computer program that can run on the processor.

Abstract: A rigid-flexible coupled unmanned aerial vehicle (UAV) morphing wing and an additive manufacturing method thereof are disclosed. A shape memory alloy (SMA) strip/wire for controlling the wing upward deformation and an SMA strip/wire for controlling the wing downward deformation are arranged alternately, and a plurality of reinforcing ribs are arranged at intervals on the SMA strips/wires for controlling the wing upward deformation and the SMA strips/wires for controlling the wing downward deformation. The SMA strips/wires for controlling the wing upward deformation and the SMA strips/wires for controlling the wing downward deformation are arranged on a flexible substrate, and are wrapped with an insulating covering. The SMA strips/wires for controlling the wing upward deformation and the SMA strips/wires for controlling the wing downward deformation each are provided with an electric heating element.

Abstract: A system for monitoring a fetal heartbeat sound has a sensor matrix adapted to be placed adjacent to a fetus, a processor for receiving signals transmitted by the sensor matrix, a processor for receiving signals transmitted by the sensor matrix, and a display connected to the processor so as to provide a humanly perceivable indication of the heartbeat sound. The sensor matrix has a plurality of sensors of which at least one of which is facing the fetus. The processor identifies a fetal heartbeat sound from among other sounds. The sensor array is affixed to a wearable article that is adapted to be worn by mother.

Abstract: A system for monitoring a fetal heartbeat sound has a sensor matrix adapted to be placed adjacent to a fetus, a processor for receiving signals transmitted by the sensor matrix, a processor for receiving signals transmitted by the sensor matrix, and a display connected to the processor so as to provide a humanly perceivable indication of the heartbeat sound. The sensor matrix has a plurality of sensors of which at least one of which is facing the fetus. The processor identifies a fetal heartbeat sound from among other sounds. The sensor array is affixed to a wearable article that is adapted to be worn by mother.