Abstract: Disclosed is a hollow sulfide microsphere with enriched sulfur vacancies, which is prepared by a method comprising the steps of: dissolving cobalt nitrate and nickel nitrate in a mixed solution of N, N-dimethylformamide and acetone with an equal volume; then adding a chelating agent thereto, subjecting a resulting mixture to a solvothermal reaction to obtain a coordination polymer microsphere; dissolving the coordination polymer microsphere and a sulfurization agent in an organic solvent, and reacting to obtain a hollow sulfide microsphere; and subjecting the hollow sulfide microsphere to reduction treatment with sodium borohydride, centrifuging, washing and drying to obtain the hollow sulfide microsphere with enriched sulfur vacancies having a particle size of 1-2.5 ?m, a shell thickness of 15-30 nm and a specific capacity of the material of 763.4 C g?1 (current density is 1 A g?1).

Abstract: The present disclosure provides a neural network-based method for calibration and localization of an indoor inspection robot. The method includes the following steps: presetting positions for N label signal sources capable of transmitting radio frequency (RF) signals; computing an actual path of the robot according to numbers of signal labels received at different moments; computing positional information moved by the robot at a tth moment, and computing a predicted path at the tth moment according to the positional information; establishing an odometry error model with the neural network and training the odometry error model; and inputting the predicted path at the tth moment to a well-trained odometry error model to obtain an optimized predicted path. The present disclosure maximizes the localization accuracy for the indoor robot by minimizing the error of the odometer with the odometry calibration method.

Abstract: A die casting method includes stirring an aluminum alloy liquid in a stirrer under an airtight vacuum condition. The stirrer includes an electromagnetic inductor and a stirring rod. The aluminum alloy liquid is simultaneously subjected to an electromagnetic stirring in a direction of a magnetic field generated by the electromagnetic inductor and a mechanical stirring under a rotation action of the stirring rod. The aluminum alloy liquid is stirred for 20-80 minutes until the aluminum alloy liquid becomes semisolid to obtain a semisolid aluminum alloy slurry. The method further includes injecting the semisolid aluminum alloy slurry into a filter die to perform die casting molding at an injection speed of 1.5-2.5 m/s, an injection specific pressure of 30-80 MPa, a pressurization pressure of 60-80 MPa, and a temperature of the filter die of 250-400° C., and maintaining pressure for 7-30 seconds to obtain the filtering cavity.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: According to an aspect of an embodiment, operations may comprise determining a target position and orientation for a calibration board with respect to a camera of a vehicle, detecting a first position and orientation of the calibration board with respect to the camera of the vehicle, determining instructions for moving the calibration board from the first position and orientation to the target position and orientation, transmitting the instructions to a device, detecting a second position and orientation of the calibration board, determining whether the second position and orientation is within a threshold of matching the target position and orientation, and, in response to determining that the second position and orientation is within the threshold of matching the target position and orientation, capturing one or more calibration camera images using the camera and calibrating one or more sensors of the vehicle using the one or more calibration camera images.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: A die casting method includes stirring an aluminum alloy liquid in a stirrer under an airtight vacuum condition. The stirrer includes an electromagnetic inductor and a stirring rod. The aluminum alloy liquid is simultaneously subjected to an electromagnetic stirring in a direction of a magnetic field generated by the electromagnetic inductor and a mechanical stirring under a rotation action of the stirring rod. The aluminum alloy liquid is stirred for 20-80 minutes until the aluminum alloy liquid becomes semisolid to obtain a semisolid aluminum alloy slurry. The method further includes injecting the semisolid aluminum alloy slurry into a filter die to perform die casting molding at an injection speed of 1.5-2.5 m/s, an injection specific pressure of 30-80 MPa, a pressurization pressure of 60-80 MPa, and a temperature of the filter die of 250-400° C., and maintaining pressure for 7-30 seconds to obtain the filtering cavity.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: A method includes obtaining first user input identifying at least one LIDAR point in a set of LIDAR points associated with an object in an image, and obtaining second user input identifying the object in the image. The method may also include generating a constraint on a relationship between a LIDAR sensor used to capture the set of LIDAR points and a camera used to capture the image. The method may additionally include reducing a cost associated with the LIDAR point being inconsistent with the object in the image subject to the constraint.

Abstract: According to an aspect of an embodiment, operations may comprise determining a target position and orientation for a calibration board with respect to a camera of a vehicle, detecting a first position and orientation of the calibration board with respect to the camera of the vehicle, determining instructions for moving the calibration board from the first position and orientation to the target position and orientation, transmitting the instructions to a device, detecting a second position and orientation of the calibration board, determining whether the second position and orientation is within a threshold of matching the target position and orientation, and, in response to determining that the second position and orientation is within the threshold of matching the target position and orientation, capturing one or more calibration camera images using the camera and calibrating one or more sensors of the vehicle using the one or more calibration camera images.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: An apparatus comprises processing circuitry for executing instructions of two or more threads of processing, hardware registers to store context data for the two or more threads concurrently, and commit circuitry to commit results of executed instructions of the threads, where for each thread the commit circuitry commits the instructions of that thread in program order. At least one defer buffer is provided to buffer at least one blocked instruction for which execution by the processing circuitry is complete but execution of an earlier instruction of the same thread in the program order is incomplete. This can help to resolve inter-thread blocking and hence improve performance.

Abstract: An apparatus has processing circuitry to execute instructions from multiple threads and hardware registers to store context data for the multiple threads concurrently. At a given time a certain number of software-scheduled threads may be scheduled for execution by software executed by the processing circuitry. Hardware thread scheduling circuitry is provided to select one or more active threads to be executed from among the software-scheduled threads. The hardware thread scheduling circuitry adjusts the number of active threads in dependence on at least one performance metric indicating performance of the threads.

Abstract: An apparatus has processing circuitry to execute instructions from multiple threads and hardware registers to store context data for the multiple threads concurrently. At a given time a certain number of software-scheduled threads may be scheduled for execution by software executed by the processing circuitry. Hardware thread scheduling circuitry is provided to select one or more active threads to be executed from among the software-scheduled threads. The hardware thread scheduling circuitry adjusts the number of active threads in dependence on at least one performance metric indicating performance of the threads.

Abstract: An apparatus comprises processing circuitry for executing instructions of two or more threads of processing, hardware registers to store context data for the two or more threads concurrently, and commit circuitry to commit results of executed instructions of the threads, where for each thread the commit circuitry commits the instructions of that thread in program order. At least one defer buffer is provided to buffer at least one blocked instruction for which execution by the processing circuitry is complete but execution of an earlier instruction of the same thread in the program order is incomplete. This can help to resolve inter-thread blocking and hence improve performance.

Abstract: A virtual image generation system for use by an end user comprises memory, a display subsystem, an object selection device configured for receiving input from the end user and persistently selecting at least one object in response to the end user input, and a control subsystem configured for rendering a plurality of image frames of a three-dimensional scene, conveying the image frames to the display subsystem, generating audio data originating from the at least one selected object, and for storing the audio data within the memory.

Abstract: Apparatus including a first liquid crystal layer configured to receive at least a portion of an image and to provide the portion of the image across an angular viewing range; first substantially transparent electrodes positioned adjacent the first liquid crystal layer, the first electrodes being configured to have at least a first configuration in which a first subset of the electrodes provide electric fields across the first liquid crystal layer to form first transparent regions and first opaque regions in the first liquid crystal layer to provide a first angular viewing range, and a second configuration in which a second subset of the electrodes provide electric fields across the first liquid crystal layer to form second different transparent regions and second different opaque regions in the first liquid crystal layer to provide a second angular viewing range, having a different angular viewing range to the first angular viewing range.