Abstract: An auto-compensation-type guide device for a moving coil of a large-scale vibration table includes a table body fixed at one side of a moving coil. A piston cylinder body is fixedly connected on an upper part of the table body. A force transmission assembly is slidably arranged in a cavity proximate to one side of the moving coil in the piston cylinder body, one end of the force transmission assembly is abutted on a piston head plate inside the piston cylinder body, and the other end is extended out of the piston cylinder body and is in transmission-connection with the moving coil. A pressurized cavity is located on the other side of the piston head plate on the piston cylinder body, and the wall of the pressurized cavity is provided with the oil and gas inlets. The oil and gas compensation pipeline is in connection with the oil and gas inlet on the pressurized cavity.

Abstract: A fluid system, a biochemical analysis and detection platform and a fluid operation method are provided. The fluid system includes: one or more first main flow paths configured to be connected with a reagent storage chamber; a second main flow path; a reaction flow path including a flow cell; a bypass flow path connected in parallel with the reaction flow path; a third main flow path; one or more branched flow paths; a first switching component connected to the one or more first main flow paths, the second main flow path and at least one of the one or more branched flow paths; a second switching component connected to the second main flow path, the reaction flow path and the bypass flow path; and a third switching component connected to the third main flow path, the reaction flow path and the bypass flow path.

Abstract: Disclosed is a method for controlling an automatic operation of a mining electric shovel considering sudden load variations during excavations, including performing a 3D reconstruction on the morphology features of the material pile to be excavated by using binocular cameras; selecting a function yw=fw(x,t) as the first excavation trajectory; monitoring the real-time volume of excavated materials in the bucket; recording the current position of the bucket tooth tip and the volume V1 of the excavated material, in a case where a large coal rock is monitored to exist in front of the bucket, and selecting the corresponding path planning scheme to avoid the large coal rock block; obtaining the current material pile surface function again; calculating the volume of the remaining excavated materials as the objective function for the second excavation; taking the ending point of the avoidance path as the starting point for the second excavation.

Abstract: Disclosed is a screening method for raw materials of high-yield sustainable aviation fuel, comprising the following steps: obtaining composition and content of fatty acid in different waste animal and vegetable oils; obtaining the theoretical limit yields of sustainable aviation fuel prepared from different fatty acids; calculating the theoretical yields of sustainable aviation fuel produced from different waste animal and vegetable oils as raw materials based on their fatty acid composition and content, as well as the theoretical limit yields of sustainable aviation fuel prepared from different fatty acids; selecting appropriate animal and vegetable oils as raw materials for producing sustainable aviation fuel based on the theoretical yields of sustainable aviation fuel. This disclosure provides guidance for enterprises to efficiently produce high-yield and high-value lipid-based bio-jet fuel.

Abstract: A monorail hoist transportation robot driven by permanent magnet and variable frequency of an explosion-proof lithium battery includes a state perception system and a cockpit, a lifting device, a power carriage and a plurality of driving units all suspended on the suspension track. Each driving unit includes a motor, and each motor has the operation modes including a constant power mode and a constant torque mode. The main controller is configured to obtain the travelling state of the monorail hoist transportation robot through the state perception system, and adjust the operation mode of the motor according to the travelling state.

Abstract: Provided are a fluid system, a fluid transport method, a gene sequencer, and a biochemical assay method. The fluid transport method includes the following steps: step a) of aspirating a first fluid from a fluid cartridge by using a pump valve assembly, so that the first fluid is input from an outlet of a flow cell into a lane of the flow cell, and the first fluid output from an inlet of the flow cell is returned to the fluid cartridge; and/or step b) of aspirating a second fluid from a fluid cartridge by using a pump valve assembly, so that the second fluid is input from the inlet of the flow cell into the lane of the flow cell, and the second fluid output from the outlet of the flow cell is returned to the fluid cartridge.

Abstract: Techniques for determining personalized head-related transfer functions (HRTFs) using a head-mounted device and in-ear devices include: receiving, from a sensor array of the head-mounted device, a first sound signal associated with a sound from a sound source in a local environment of a user of the head-mounted device; determining that reverberation characteristics and spectral characteristics of the sound meet predetermined criteria based on the first sound signal; determining that the sound source is stationary within a time period; determining a relative location of the sound source with respect to the user; receiving, from an in-ear device in an ear of the user, a second sound signal associated with the sound from the sound source; and determining, based on at least the second sound signal, an HRTF or one or more parameters of the HRTF associated with the relative location of the sound source for the user.

Abstract: Flexible optical fiber ribbon includes multiple optical fibers. The multiple optical fibers are optical fibers arranged side by side, and multiple bonded portions are arranged between adjacent optical fibers and distributed intermittently along the longitudinal direction, the multiple bonded portions being made of the same material; each optical fiber has a ink layer at the underlying outermost layer and a transparent coating layer at the outermost layer; the transparent coating layers of the multiple optical fibers are made of the same material, and the transparent coating layers are continuous in the axial direction and continuous in the circumferential direction; the colors and/or shapes of the ink layers of optical fibers are observed through the transparent coating layers, and there is at least one optical fiber, among the multiple optical fibers, of which the color and/or shape of the ink layer thereof is different from that of another optical fiber among the multiple optical fibers.

Abstract: A method of automated database element processing includes training a wide machine learning model with historical feature vector inputs to generate a wide ranked element output. The method includes training a deep machine learning model with the historical feature vector inputs to generate a deep ranked element output. The method includes generating a set of inputs specific to an individual entity, obtaining a set of current article database elements, and creating a feature vector input according to the set of inputs and the set of current article database elements. The method includes processing the feature vector input with the wide machine learning model to generate a wide ranked element list, processing the feature vector input with the deep machine learning model to generate a deep ranked element list, and merging database elements of the wide and deep ranked element lists to generate a ranked element recommendation output.

Abstract: A DC/DC converter includes a switching circuit and a capacitor. The switching circuit includes a first bridge arm and a second bridge arm connected in parallel. The first bridge arm includes a first switch and a second switch. The second bridge arm includes a third switch and a fourth switch. The capacitor is electrically connected with a node between the first switch and the second switch. While the switching circuit is switched from a half-bridge mode to a full-bridge mode, the duty cycle of the control signal for controlling the fourth switch is gradually decreased from 100% to be synchronized with the duty cycle of the control signal for controlling the first switch. Then, the duty cycle of the control signal for controlling the third switch is gradually increased from zero to be synchronized with the duty cycle of the control signal for controlling the second switch.

Abstract: A quasi-vertical JBS diode and a monolithic integrated three-phase DRU are provided. The quasi-vertical JBS diode includes a Si substrate, a N+ GaN conductive layer and an N-type GaN drift layer sequentially disposed from bottom to top. A top region of the N-type GaN drift layer defines groove structures distributed concentrically and annularly, and a Mg-doped P-type BN material is disposed on an inside of each of the groove structures and a side of the N-type GaN drift layer. An anode is disposed on a surface of the N-type GaN drift layer defining the groove structures. A cathode is disposed on a surface of the N+ GaN conductive layer at intervals around the N-type GaN drift layer. The monolithic integrated three-phase DRU includes three AC input terminals, two rectified DC output terminals and diode groups corresponding to six rectifier bridge arms. The diodes each are the quasi-vertical JBS diode.

Abstract: A MOSFET device based on nickel oxide (NiO) gate modulation and its preparation method are provided. The MOSFET device includes a substrate layer, a first N-type gallium nitride (GaN) layer, a second N-type GaN layer, a P-type GaN layer, and a third N-type GaN layer disposed sequentially from bottom to top; gate stepped parts extending from both ends of an upper surface of the third N-type GaN layer to an interior of the second N-type GaN layer; gate structures extending from the upper surface of the third N-type GaN layer to bottoms of the gate stepped parts; a source recess, a source electrode, drain electrodes and NiO modulation layers extending from the bottoms of the gate stepped parts to an upper surface of the first N-type GaN layer. By setting the NiO modulation layers, a voltage withstand level of the MOSFET device is improved.

Abstract: A monorail hoist transportation robot driven by permanent magnet and variable frequency of an explosion-proof lithium battery includes a state perception system and a cockpit, a lifting device, a power carriage and a plurality of driving units all suspended on the suspension track. Each driving unit includes a motor, and each motor has the operation modes including a constant power mode and a constant torque mode. The main controller is configured to obtain the travelling state of the monorail hoist transportation robot through the state perception system, and adjust the operation mode of the motor according to the travelling state.

Abstract: A method of automated database element processing includes training a wide machine learning model with historical feature vector inputs to generate a wide ranked element output. The method includes training a deep machine learning model with the historical feature vector inputs to generate a deep ranked element output. The method includes generating a set of inputs specific to an individual entity, obtaining a set of current article database elements, and creating a feature vector input according to the set of inputs and the set of current article database elements. The method includes processing the feature vector input with the wide machine learning model to generate a wide ranked element list, processing the feature vector input with the deep machine learning model to generate a deep ranked element list, and merging database elements of the wide and deep ranked element lists to generate a ranked element recommendation output.

Abstract: A chip processing device integrated with a reagent kit, a gene sequencer, a gene sequencing apparatus, and a method of performing biochemical detection. The chip processing device includes a substrate extending in a first direction, and a reagent kit platform and a chip platform assembled side-by-side and adjacently on the substrate in a second direction transverse to the first direction. The chip platform has a chip receiving area for accommodating a chip, the reagent kit platform has an accommodating chamber, and the reagent kit is received in the accommodating chamber. The reagent kit has a first fluid transport structure, the chip platform has a second fluid transport structure located on the chip platform and at least partially overlap and communicate with the first fluid transport structure. The first fluid transport structure is in fluid communication with the chip via the second fluid transport structure.

Abstract: The present disclosure belongs to the technical field of mining equipment, and in particular related to an automatic driving system of a monorail hoist driven based on a digital twin and a method thereof. The system includes a railroad switch sensor module, a positioning system module, a data transferring system, an intelligent control system, a digital twin system and an automatic driving module. The railroad switch sensor module is configured to sense the connection-position state of a movable track in a monorail hoist railroad switch track. The data transferring system is configured to transmit the data on the surface and underground. The method applies the digital twin technology to the automatic driving in the monorail hoist, reduces the input of personnel in the mine, and avoids safety accidents caused by irregular management or improper operation of the driver, through the deploying of the automatic driving module for the monorail hoist.

Abstract: In some examples, as part of an authentication process for an electronic device when connecting to a first access point (AP), an authentication server generates a first key of a hierarchy of keys. The authentication server receives a request from a second AP, and generates a second key based on the first key, the second key being part of the hierarchy of keys. In response to the request, the authentication server distributes the second key from the authentication server to the second AP for use in data protection for communications between the second AP and the electronic device after the electronic device has transitioned from the first AP to the second AP.

Abstract: Systems and methods are provided for fault detection in a component of a machine during operation. Vibration data is acquired based on a vibration signal output from a sensor associated with the component. The vibration data is analyzed with at least two machine learning models to predict a condition of the component.

Abstract: A control method for a train to enter an emergency traction mode is provided. The control method for a train to enter an emergency traction mode is applicable to a traction control system of a train. The method includes the following steps: It is detected whether current emergency traction information satisfies a condition of entering an emergency traction mode. When the current emergency traction information satisfies the condition of entering the emergency traction mode, the train is controlled to enter the emergency traction mode. A hard-wired signal sent by a driver controller is received, and a corresponding operation is performed according to a type of the hard-wired signal.

Abstract: The present invention relates to the field of robotic arm teleoperation technology, and specifically to a construction method and system for real-time teleoperation of a dual arm and hand robot based on vision guidance, which includes setting up a first experimental platform, acquiring pose information of the dual arm and hand robot and a homogeneous transformation matrix of an end joint and transforming a first coordinate system; setting up a second experimental platform; performing calibration by a plurality of cameras and transforming a second coordinate system; obtaining spatial transformation pose information of the end joint of the robotic arm under a tracking state, reading finger pose data, and performing real-time following. The real-time teleoperation system of the present disclosure includes a control system host, an operation glove, an optical locator, a positioning coordinate plate, a marker ball tool, and a dual arm and hand robot.