Abstract: Embodiments of the disclosure discloses a question answering method and apparatus, a device and a medium. The method comprises: acquiring a current question, first historical question answering data, and a current chapter of a first script; inputting the current question, the first historical question answering data, and the current chapter into a dialog sub-model of a first model to obtain a current answer; adding the current question and the current answer to the first historical question answering data to obtain second historical question answering data; inputting the second historical question answering data and the current chapter into a determination sub-model of the first model to determine a completion result of a current task corresponding to the current chapter; generating a plot-related sentence by using the dialog sub-model based on the completion result of the current task, and presenting the plot-related sentence and the current answer.

Abstract: The disclosure provides an electric power transmission safety monitoring system for a thunderstorm area. The system includes a transmission platform, an area characteristic analysis unit and a transmission influence analysis unit, where the transmission platform may receive an electric power transmission request sent by a current power supply end, determine a power demand end and a transmission area where the power demand end is located. After receiving the area characteristic analysis signal sent by the transmission platform, the area characteristic analysis unit carries out thunderstorm characteristic analysis, and sends the analysis result to the transmission influence analysis unit and the transmission platform. The transmission platform further formulates an electric power transmission strategy.

Abstract: A power head of a directional drill includes a main motor, gearbox, main shaft, active drill pipe, and water swivel. The gearbox has a driving shaft connected to the main motor and engaged with the main shaft via a gear. One end of the main shaft is fixedly connected to the active drill pipe, while the other end of the driving shaft links to an angle adjuster through the gearbox, enabling efficient toolface adjustment and braking of the main motor. The water swivel mandrel connects to the active drill pipe via a connecting shaft with an axial floating structure. A connecting sleeve near the water swivel forms a hexagonal sleeve sliding pair with the connecting shaft, preventing axial impacts on mandrel support bearings during drilling. This design enhances the service life of the bearings and reduces equipment repairs, improving the reliability and efficiency of the drilling process.

Abstract: A power head of a directional drill includes a main motor, gearbox, main shaft, active drill pipe, and water swivel. The gearbox has a driving shaft connected to the main motor and engaged with the main shaft via a gear. One end of the main shaft is fixedly connected to the active drill pipe, while the other end of the driving shaft links to an angle adjuster through the gearbox, enabling efficient toolface adjustment and braking of the main motor. The water swivel mandrel connects to the active drill pipe via a connecting shaft with an axial floating structure. A connecting sleeve near the water swivel forms a hexagonal sleeve sliding pair with the connecting shaft, preventing axial impacts on mandrel support bearings during drilling. This design enhances the service life of the bearings and reduces equipment repairs, improving the reliability and efficiency of the drilling process.

Abstract: The present invention belongs to the technical field of coal mine drills, and relates to a coal mine automatic directional drill, comprising a moving platform, a machine frame, a clamper, a main manipulator, a power head, a drill pipe storage system, a control system and a hydraulic system. In the present invention, a structure of the power head is improved, an angle adjuster is arranged on one side of a gearbox away from a main motor, and a transmission shaft in the angle adjuster is circumferentially and fixedly connected with a driving shaft, thus a toolface azimuth is adjusted accurately and efficiently and a structure of a rotary brake device of the main motor is simplified by the angle adjuster which has functions of accurate angle adjustment, locking and anti-rotation.

Abstract: The invention relates to a rotation angle control and braking device for a power head of a directional drill, belonging to the technical field of coal mine drills. It includes a transmission shaft, driving piston, fixed toothed disk, moving toothed disk, end cover, rotary seat, connecting seat, and a rotary speed reducer with a self-locking function. One end of the transmission shaft is fixedly connected to the drill's driving shaft. The fixed and moving toothed disks are sheathed on the transmission shaft, with springs placed between the moving toothed disk and the end cover. Skewed teeth between the disks engage under spring action. By injecting oil into a sealing cavity between the connecting seat and driving piston, the driving piston moves the moving toothed disk to disengage the skewed teeth. The rotary seat, fixed to the moving toothed disk, connects to the rotary speed reducer's output disk, enabling controlled rotation.

Abstract: The present invention relates to a combined drilling system with double rotary driving devices and a control method, belonging to the technical field of coal mine drills. The other end of a driving shaft in the gearbox connects to an adjuster, which includes a transmission shaft, fixed toothed disk, moving toothed disk, rotary seat, end cover, and a rotary speed reducer with a self-locking function. One end of the transmission shaft is fixedly connected to the driving shaft. The fixed and moving toothed disks are sheathed on the transmission shaft, with the fixed toothed disk engaged with the moving toothed disk through skewed teeth. The moving toothed disk is rotationally connected and can slide axially along the transmission shaft. The rotary seat is fixedly connected to the moving toothed disk, while the rotary speed reducer's output disk is coaxially fixed to the rotary seat, enabling controlled rotation.

Abstract: The present invention relates to a coal mine intelligent directional drill and its drilling method, belonging to the technical field of coal mine drills. It comprises a moving platform, machine frame, clamper, main manipulator, power head, drill pipe storage system, control system, and hydraulic system. The power head structure is improved by adding an angle adjuster with accurate angle adjustment, locking, and anti-rotation functions. The angle adjuster is positioned on the gearbox side opposite the main motor, connected via a driving shaft. The control system includes a toolface azimuth detection and initialization system that works with the angle adjuster. This solves prior issues such as the absence of specialized toolface azimuth adjustment devices, low precision, low track adjustment efficiency, and challenges in achieving automatic directional drilling in the prior art. The invention enhances precision and efficiency, enabling automated, intelligent directional drilling.

Abstract: The invention relates to a rotation angle control and braking device for a power head of a directional drill, belonging to the technical field of coal mine drills. It includes a transmission shaft, driving piston, fixed toothed disk, moving toothed disk, end cover, rotary seat, connecting seat, and a rotary speed reducer with a self-locking function. One end of the transmission shaft is fixedly connected to the drill's driving shaft. The fixed and moving toothed disks are sheathed on the transmission shaft, with springs placed between the moving toothed disk and the end cover. Skewed teeth between the disks engage under spring action. By injecting oil into a sealing cavity between the connecting seat and driving piston, the driving piston moves the moving toothed disk to disengage the skewed teeth. The rotary seat, fixed to the moving toothed disk, connects to the rotary speed reducer's output disk, enabling controlled rotation.

Abstract: The present invention relates to a combined drilling system with double rotary driving devices and a control method, belonging to the technical field of coal mine drills. The other end of a driving shaft in the gearbox connects to an adjuster, which includes a transmission shaft, fixed toothed disk, moving toothed disk, rotary seat, end cover, and a rotary speed reducer with a self-locking function. One end of the transmission shaft is fixedly connected to the driving shaft. The fixed and moving toothed disks are sheathed on the transmission shaft, with the fixed toothed disk engaged with the moving toothed disk through skewed teeth. The moving toothed disk is rotationally connected and can slide axially along the transmission shaft. The rotary seat is fixedly connected to the moving toothed disk, while the rotary speed reducer's output disk is coaxially fixed to the rotary seat, enabling controlled rotation.

Abstract: The present invention belongs to the technical field of coal mine drills, and relates to a coal mine automatic directional drill, comprising a moving platform, a machine frame, a clamper, a main manipulator, a power head, a drill pipe storage system, a control system and a hydraulic system. In the present invention, a structure of the power head is improved, an angle adjuster is arranged on one side of a gearbox away from a main motor, and a transmission shaft in the angle adjuster is circumferentially and fixedly connected with a driving shaft, thus a toolface azimuth is adjusted accurately and efficiently and a structure of a rotary brake device of the main motor is simplified by the angle adjuster which has functions of accurate angle adjustment, locking and anti-rotation.

Abstract: The present invention relates to a coal mine intelligent directional drill and its drilling method, belonging to the technical field of coal mine drills. It comprises a moving platform, machine frame, clamper, main manipulator, power head, drill pipe storage system, control system, and hydraulic system. The power head structure is improved by adding an angle adjuster with accurate angle adjustment, locking, and anti-rotation functions. The angle adjuster is positioned on the gearbox side opposite the main motor, connected via a driving shaft. The control system includes a toolface azimuth detection and initialization system that works with the angle adjuster. This solves prior issues such as the absence of specialized toolface azimuth adjustment devices, low precision, low track adjustment efficiency, and challenges in achieving automatic directional drilling in the prior art. The invention enhances precision and efficiency, enabling automated, intelligent directional drilling.

Abstract: The present disclosure provides a method, a device, a computer-readable storage medium, and a computer program product for detecting key segments in an audio or video. The method includes: obtaining multi-modal features of an audio or video, where the multi-modal features include a visual feature, an acoustic feature, and a natural language feature; determining candidate key segments in the audio or video based on the multi-modal features; obtaining a keyword list based on automatic speech recognition (ASR) text of the candidate key segments; and determining a key segment in the audio or video based on the keyword list.

Abstract: A method for performing Building Information Modelling design collaboration via Confidentiality-Minded Framework using Interplanetary-File-System-Blockchain integrated network by a server is provided. The method includes: segregating one or more sensitive and non-sensitive BIM portions of a BIM object; uploading a target BIM component into an IPFS network to receive a target content identifier (CID) of the target BIM component from the IPFS network; if the target BIM component has one or more of the sensitive portions, encrypting the target CID to obtain a target encrypted CID (ECID), and adding the target ECID into a target blockchain ledger as a target transaction via a target smart contract; accessing the target transaction to download the target BIM component from the IPFS network; and performing a design coordination operation on the target BIM component, so as to distributing revised target BIM component to a receiver terminal.

Abstract: The present disclosure relates to a subtitle generation method, a subtitle generation apparatus, an electronic device, a storage medium and a program.

Abstract: The present disclosure provides a video processing method and apparatus, an electronic device, and a medium, and the method includes: acquiring a to-be-erased region including a to-be-erased object in each target video frame of a to-be-processed video; acquiring, for a single target video frame, acquiring, from another target video frame other than the target video frame, a target region that corresponds to a to-be-erased region of the target video frame and does not include the to-be-erased object; filling pixels of the target region into the to-be-erased region of the target video frame, to erase the to-be-erased region of the target video frame; and in response to an unerased region existing in the to-be-erased region of the target video frame, predicting pixels of the unerased region according to the target video frame, and filling the unerased region according to the predicted pixels to erase the unerased region.

Abstract: A method for performing Building Information Modelling design collaboration via Confidentiality-Minded Framework using Interplanetary-File-System-Blockchain integrated network by a server is provided. The method includes: segregating one or more sensitive and non-sensitive BIM portions of a BIM object; uploading a target BIM component into an IPFS network to receive a target content identifier (CID) of the target BIM component from the IPFS network; if the target BIM component has one or more of the sensitive portions, encrypting the target CID to obtain a target encrypted CID (ECID), and adding the target ECID into a target blockchain ledger as a target transaction via a target smart contract; accessing the target transaction to download the target BIM component from the IPFS network; and performing a design coordination operation on the target BIM component, so as to distributing revised target BIM component to a receiver terminal.

Abstract: A magnetic resonance imaging (MRI) contrast agent and a preparation method and a use thereof is provided, which belong to the technical field of Magnetic Resonance Imaging contrast agent. The MRI contrast agent is prepared by the compound having a structure of formula I; and it also may include the compound having a structure of formula II or a pharmaceutically acceptable salt thereof, wherein M1 is a divalent ion or a trivalent ion of a paramagnetic metal selected from Mn, Fe, Eu, or Dy; M2 is selected from Na+, K+ or meglumine cation; when M1 is a divalent ion, a is 2; when M1 is a trivalent ion, a is 3. The MRI contrast agent has good water solubility, high relaxivity, and low toxic and side effect.

Abstract: Embodiments are disclosed for disabling/re-enabling head tracking for spatial audio applications. In an embodiment, a method comprises: obtaining, using one or more processors of an auxiliary device worn by a user, motion data; tracking, using the one or more processors, the user's head based at least in part on the motion data; determining, using the one or more processors, whether or not the user is walking based at least in part on the motion data; in accordance with determining that the user is walking, determining if a source device configured to deliver spatial audio to the auxiliary device is static for a specified period of time; and in accordance with determining that the user is walking and the source device is static for the specified period of time, disabling the head tracking.

Abstract: A method and for child state analysis, a vehicle, an electronic device, and a storage medium are provided. The method includes: performing face feature extraction on at least one image frame in an obtained video stream; classifying whether a person in the image is a child and at least one state of the person according to face features to obtain a first classification result of whether the person in the image is a child, and a second classification result of the at least one state of the person; outputting the first classification result and the second classification result; and/or outputting prompt information according to the first classification result and the second classification result.