Abstract: A data processing system implements receiving a far-end signal associated with a first computing device participating in an online communication session and receiving a near-end signal associated with a second computing device participating in the online communication session. The near-end signal includes speech of a target speaker, a first interfering speaker, and an echo signal. The system further implements providing the far-end signal, the near-end signal, and an indication of the target speaker as an input to a machine learning model. The machine learning model trained to analyze the far-end signal and the near-end signal to perform personalized noise suppression (PNS) to remove speech from one or more interfering speakers and acoustic echo cancellation (AEC) to remove echoes. The model is trained to output an audio signal comprising speech of the target speaker. The system obtains the audio signal comprising the speech of the target speaker from the model.

Abstract: The present invention relates to a slag-based fine aggregate, a supplementary cementitious material and UHPC as well as preparation methods and use thereof, and belongs to the technical field of building materials. The slag-based fine aggregate includes the following components: slag, nano-alumina, and a carbonization reaction amount of carbon dioxide. The slag-based UHPC includes the following components: cement, fly ash, silica fume, a slag-based supplementary cementitious material, the above-mentioned slag-based fine aggregate, natural river sand, a fiber, a water reducer, and water; and raw materials for preparing the slag-based supplementary cementitious material include slag and carbon dioxide. Through deep treatment of tunnel slag using a comprehensive optimization scheme, physical and chemical properties of the slag are enhanced, performance stability of a material is improved, and waste slag is successfully converted into a raw material for the UHPC.

Abstract: A method for evaluating tunnel health based on machine learning, including: constructing a tunnel health evaluation layer structure model; acquiring criterion layer data based on current index layer data of each section of a tunnel; calculating a lining deformation superposition quantity according to the data of lining cracks and the data of water seepage and leakage, and correcting the data of lining deformation based on the superposition quantity to obtain real data of lining deformation; and inputting the real data of lining deformation and other current tunnel criterion layer data into a machine learning model to obtain a current health level judging result of each section of the tunnel, implementing corresponding tunnel renovation measures according to the health level judging result of each section of the tunnel.

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 provided is an applicability regulation method for cement-based materials including: obtaining respectively Rockwell hardnesses and equivalent lengths of each phase in cement-based materials; determining effective hardnesses of the cement-based materials through weighted calculation; measuring Rockwell hardnesses of non-rigid projectiles as effective hardnesses; calculating the effective hardnesses of the non-rigid projectiles and relative hardnesses of the cement-based materials; establishing relationship curves between penetration resistances and the relative hardnesses, as well as between projectile deformation degrees and the relative hardnesses by measuring penetration resistance and a projectile deformation degree for various cement-based material and non-rigid projectile combinations with different relative hardness; confirming a relative hardness application value, and calculating an effective hardness application value of the cement-based material based on the effective hardness of the non-rigid

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: Systems and methods are provided for training and using a total duration-aware (TDA) model to control the duration of speech utterances by a text-to-speech computing system when converting text into speech. During use, text to be converted into speech and target output speech time duration are used as inputs into the TDA model. The text is then tokenized into phonemes, and the TDA model predicts frame durations for each phoneme. The TDA model is trained on phonemes derived from text, corresponding actual frame durations for the phonemes, and a target output speech time duration. The TDA model masks a subset of the actual frame durations, and generates predicted frame durations for the subset. A loss between the actual and predicted frame durations is calculated, and used to adjust parameters of the TDA model to control future generation of predicted frame durations.

Abstract: The present invention provides a method for determining usability of cement-based composites, comprising: regarding cement-based composites with different known components as multiphase materials, respectively measuring Rockwell hardnesses of each phase; calculating an equivalent length based on volume ratio of each phase; acquiring an effective hardness of the cement-based composite through weighted calculation based on the Rockwell hardness and the equivalent length of each phase; measuring penetration resistance of the cement-based composite with different components, and establishing an association relationship between the effective hardness and the penetration resistance; calculating an effective hardness of a cement-based composite with unknown penetration resistance, calculating an evaluation value of the penetration resistance by using the established association relationship; and applying the cement-based composite to intended use thereof when a judging result shows that an applicable result correspo

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.