Abstract: The present disclosure relates to the technical field of mine mining simulation, and discloses a simulation test system for multi-scale overlying strata spatial structure evolution and disaster response and a working method thereof. The system includes a loading test host, a hydraulic station, a power distribution cabinet, and an industrial control computer. The loading test host includes a base, a main framework, a first top loading unit, a second top loading unit, a bottom excavation unit, a buffering energy release device, a telescopic rod group, and rock plate stamping device. The present disclosure has multiple working modes to achieve two-dimensional/three-dimensional simulation of the movement and response characteristics of overlying strata under conditions of large burial depth, strong mining vibration, and continuous mining of multiple working faces, and to simulate the entire process of coal mine vibration and seismogenic-triggering process of coal mine earthquakes.

Abstract: The present disclosure generally relates to techniques and user interfaces for controlling and displaying representations of user in environments, such as during a live communication session and/or a live collaboration session.

Abstract: A head-mounted device may have a head-mounted support structure. Displays may present images to eye boxes at the rear of the head-mounted support structure. Cameras and other sensors may be supported by the head-mounted support structure. Tracking cameras may be used to track the movement of a user's hands or other external objects. In dim ambient lighting conditions, a supplemental illumination system may be activated to provide supplemental illumination for the tracking cameras. A single beam of supplemental illumination may be emitted over a given coverage area or a smaller beam of supplemental illumination may be steered across the given coverage area. Light-emitting devices such as infrared light-emitting diodes and infrared lasers may be used to form infrared light sources for the supplemental illumination system.

Abstract: A frequency hopping communication method for short-distance wireless communication between a primary device and a secondary device comprises switching by the primary device from the second frequency hopping sequence to the first frequency hopping sequence at a time point of frequency hopping switching, wherein M reserved channels are between a first frequency hopping sequence and a second frequency hopping sequence; and performing frequency hopping communication with the secondary device based on the first frequency hopping sequence.

Abstract: A relative position change sensor includes a laser element and an image sensor. The relative position change sensor is disposed within a nose pad of a head-mounted electronic device so that the laser element is positioned to emit laser light against a substantially stationary portion of the wearer's anatomy, such as a side of the nasal bone of the wearer. As a result of this construction and orientation, the image sensor is configured to be illuminated with a laser speckle pattern that may shift in plane proportional to movement between the substantially stationary portion and the head-mounted electronic device. Upon determining such a shift has occurred, the relative position change sensor may report a slippage event in respect of the head-mounted electronic device and the wearer.

Abstract: Various implementations disclosed herein include devices, systems, and methods that initiate an action based on a detected gaze direction oriented towards a target area (e.g., a hot corner/zone). For example, an example process may include producing a reflection by directing light towards an eye using an illuminator, receiving sensor data from a sensor, wherein a direction of sensing by the sensor (e.g., the optical axis of the camera) and a direction from the eye to a target area are approximately aligned, determining a reflective property (e.g., a spectral property) of the reflection based on the sensor data, detecting that a gaze direction of the eye is approximately oriented towards the target area (e.g., a hot zone/spot) based on the reflective property, and initiating an action based on detecting that the gaze direction is approximately oriented towards the target area.

Abstract: An optical proximity sensor includes a housing, an optical emitter, and an optical detector. A first light guide disposed in a first chimney of the housing is configured to direct light from the optical emitter through the first chimney towards a target location. A second light guide disposed in a second chimney of the housing is configured to direct a returned portion of the light emitted from the optical emitter through the second chimney towards the optical detector.

Abstract: A multi-channel SMI sensor includes an emitter configured to emit light having different polarizations and a polarization-selective lens for directing light having different polarizations towards different locations. The multi-channel SMI sensor is configured to measure physical phenomena at two different locations with a small footprint.

Abstract: A refrigerating and freezing device including a cabinet, and an aging device for aging a to-be-aged material therein is provided in the cabinet. The aging device includes an outer housing and an inner housing provided in the outer housing, and an aging chamber for accommodating the to-be-aged material is defined in the inner housing; two transverse sides of the inner housing and two transverse sides of the outer housing are arranged at intervals to form two longitudinally extending air supply channels, and the air supply channels are communicated with the aging chamber through air supply ports formed in two transverse side plates of the inner housing. The aging device further includes a circulating fan for driving air flow in the two air supply channels to flow into the aging chamber through the air supply ports.

Abstract: An opto-electronic device includes a laser speckle flow sensor that is positioned interior to the opto-electronic device and configured to sense through a cover stack of the opto-electronic device. The laser speckle flow sensor includes a laser light source that is operable to emit a beam of light, and an image sensor having a two-dimensional (2D) array of pixels. The image sensor is positioned to receive a portion of the beam of light redirected from a target. One or more of an axis of the beam of light intersecting a surface of the cover stack at a non-perpendicular angle, at least one optical element positioned to receive the beam of light and change a mode field diameter (MFD) of the beam of light, a control circuit that selects the laser light source from among a set of switchable laser light sources, or other described features enable the laser speckle flow sensor to sense through a range of different cover stack thicknesses.

Abstract: In some examples, an ion funnel-based collision cell may include an ion funnel entrance section formed by a plurality of adjacently disposed entrance members. Each entrance member of at least one pair of the adjacently disposed entrance members may include a successively larger opening to form a tapered or profiled entrance for ions entering the ion funnel-based collision cell. An insulation material may be disposed adjacent to or in contact with each entrance member of the at least one pair of the adjacently disposed entrance members to prevent, outside of each successively larger opening, flow of gas between each entrance member of the at least one pair of the adjacently disposed entrance members.

Abstract: A device includes a head-mountable frame, an optical sensor subsystem mounted to the head-mountable frame and including a set of one or more SMI sensors, and a processor. Each SMI sensor is positioned to be spaced a respective distance from a skin surface of a user. The set of one or more SMI sensors is configured to emit a set of one or more beams of light. The processor is configured to operate the optical sensor subsystem to cause the set of one or more SMI sensors to emit the set of one or more beams of light toward the skin surface of the user; to receive a set of one or more SMI signals from the set of one or more SMI sensors; and to determine a respiration characteristic of the user based at least in part on the set of one or more SMI signals.

Abstract: An optical sensing systems for through-display sensing. The optical sensing system includes a transmit side and a receive side. The transmit side includes at least two polarization-locked laser elements that are oriented to emit polarized light in two separate orientations orthogonal to one another through an inter-pixel region of the display. The different polarizations decrease temperature dependence of crosstalk magnitude.

Abstract: An opto-electronic device includes an optical sensor. The optical sensor includes an image sensor having a two-dimensional (2D) array of pixels, and a light source operable to illuminate at least a portion of a field of view imaged by the image sensor. The opto-electronic device also includes a cover stack that passes light emitted by the light source and light received by the image sensor, and a processor. The processor is configured to determine a thickness of the cover stack, and operate at least a portion of the 2D array of pixels in one of a binned pixel mode or a non-binned pixel mode, responsive to the determined thickness of the cover stack.

Abstract: This application provides a low-power-consumption control method and a short-range wireless communication chip, and belongs to the field of short-range wireless communication technologies. The method includes: obtaining actual received signal strength indications corresponding to a plurality of historical receive slots; predicting, based on the actual received signal strength indications corresponding to the plurality of historical receive slots, received signal strength corresponding to a current receive slot; and adjusting a gain coefficient of a receive channel in a radio frequency front-end module in the current receive slot based on a predicted received signal strength indication. The radio frequency front-end module is coupled to the short-range wireless communication chip.

Abstract: In some examples, a multipole ion guide may include a plurality of electrode groups that are arranged circumferentially around an axis of the multipole ion guide. At least one electrode group of the plurality of electrode groups may include at least three electrodes that are disposed in a side-by-side configuration.

Abstract: A computer system displays a representation of a user poses in a three-dimensional environment in response to movement of the current viewpoint of the user. The computer system displays different representations of movement of a virtual representation of a user based on the type of the virtual representation. The computer system reduces a visual prominence of virtual representations while changing a spatial arrangement of a virtual object shared in a communication session. The computer system displays different visual feedback while moving a virtual object in accordance with the virtual object being shared or not shared in a communication session. The computer system displays visual feedback indicating audio provided by another user. The computer system displays feedback indicating participants will correspond to positions. The computer system displays a visual transition sequence when displaying a visual representation of a participant in a communication session.

Abstract: An electrostatic lens for transporting charged particles in an axial direction includes a first group of first electrodes configured to receive a first DC potential from a DC voltage source, and a second group of second electrodes configured to receive a second DC potential from the DC voltage source different from the first DC potential. The first electrodes are interdigitated with the second electrodes. The first group and/or the second group has a geometric feature that progressively varies along the axial direction. The lens generates an axial potential profile that progressively changes along the axial direction, and thereby reduces geometrical aberrations. The lens may be part of a charged particle processing apparatus such as, for example, a mass spectrometer or an electron microscope.

Abstract: Optical sensing apparatus includes a transmitter, which is configured to emit FM coherent optical radiation toward a target. A receiver alongside the transmitter includes an array of optical detectors. An objective optic focuses optical radiation that is reflected from the target onto the receiver. A transparent slab over the transmitter and the receiver has a first face facing the substrate and an opposing second face, which includes a first diffractive structure intercepting the transmit axis and configured to deflect a part of the FM coherent optical radiation to form a local beam propagating diagonally within the transparent slab and reflecting from the second face toward the receive axis. A second diffractive structure on the second face intercepts the receive axis and projects the reflected local beam onto the array of detectors, whereby the local beam mixes at the array with the optical radiation reflected from the target.

Abstract: An eye tracking device includes a head-mountable frame, an optical sensor subsystem mounted to the head-mountable frame, and a processor. The optical sensor subsystem includes a set of one or more SMI sensors. The processor is configured to operate the optical sensor subsystem to cause the set of one or more SMI sensors to emit a set of one or more beams of light toward an eye of a user; to receive a set of one or more SMI signals from the set of one or more SMI sensors; and to track a movement of the eye using the set of one or more SMI signals.