Abstract: The present disclosure describes a system and method for coaxial LiDAR scanning. The system includes a first light source configured to provide first light pulses. The system also includes one or more beam steering apparatuses optically coupled to the first light source. Each beam steering apparatus comprises a rotatable concave reflector and a light beam steering device disposed at least partially within the rotatable concave reflector. The combination of the light beam steering device and the rotatable concave reflector, when moving with respect to each other, steers the one or more first light pulses both vertically and horizontally to illuminate an object within a field-of-view; obtain one or more first returning light pulses, the one or more first returning light pulses being generated based on the steered first light pulses illuminating an object within the field-of-view, and redirects the one or more first returning light pulses.

Abstract: Embodiments discussed herein refer to a relatively compact and energy efficient LiDAR system that uses a multi-plane mirror in its scanning system.

Abstract: The present invention discloses a container equipment for enclosed transportation and heterotopic and aerobic stabilization of reserved garbage, which includes a container body and a functional lining provided on an inner wall of the container body, wherein the functional lining is provided with a circulating air low-temperature evaporation system, a water distribution and drainage system and a heating and insulating system; the circulating air low-temperature evaporation system includes an air inlet manifold, an air distribution perforated pipe, a base plate water discharge and air distribution groove and a top plate water distribution and air guide groove, an air extraction perforated pipe, a fan, an air outlet pipe and a quicklime dehydration and deodorization system; the water distribution and drainage system includes a percolate feeding pipe, a fiber capillary water distribution pipe, the top plate water distribution and air guide groove, a side drain, a main drain and a percolate discharge pipe; the hea

Abstract: The present invention provides a prodrug compound, a preparation method, and the use thereof. In particular, the present invention provides a compound as represented by formula (I), a preparation method, and the use thereof as a prodrug for preparing topical formulations.

Abstract: Three-dimensional (3D) printing of graphene materials and methods and apparatuses for making same. In some embodiments, combined metal powder and carbon growth sources (such as powder Ni and sucrose) are utilized in the 3D printing process. In other embodiments, metal powders with binders (such as powder Ni and a polymer bases binder) are utilized in the 3D printing process. The metal in the resulting 3D printed composite material can then be etched or otherwise removed yielding the 3D printed graphene materials.

Abstract: A laser device for providing light to a LiDAR system comprises a plurality of seed lasers configured to provide multiple seed light beams, at least two of the seed light beams having different wavelengths. An amplifier is optically coupled to the plurality of seed lasers to receive the multiple seed light beams. A power pump is configured to provide pump power to the amplifier, where the amplifier amplifies the multiple seed light beams using the pump power to obtain amplified light beams. A second light coupling unit is configured to demultiplex the amplified light beams to obtain a plurality of output light beams, at least two of the output light beams having wavelengths corresponding to the wavelengths of the at least two seed light beams.

Abstract: Embodiments discussed herein refer to a relatively compact and energy efficient LiDAR system that uses a multi-plane mirror in its scanning system.

Abstract: A semiconductor structure includes a substrate; a first electrode layer over the substrate; a dielectric layer on a sidewall surface of the first electrode layer; and a second electrode layer over the substrate. The first electrode layer, the dielectric layer, and the second electrode layer are arranged in a direction parallel to a surface of the substrate.

Abstract: A light ranging and detection (LiDAR) system is provided. The system comprises a housing; a transmitter configured to transmit one or more light beams; and a beam steering apparatus optically coupled to the transmitter to receive the one or more light beams. The beam steering apparatus comprises one or more moveable optics configured to scan the one or more light beams to a field-of-view and to receive return light. The system further comprises a curved window mounted to, or integrated with, the housing of the LiDAR system. The curved window is shaped in a manner such that a thickness of the curved window varies along one or more dimensions of the curved window to facilitate bending at least some of the scanned one or more light beams to expand the field-of-view (FOV) in at least one of a horizontal direction or a vertical direction.

Abstract: A method for enabling light detection and ranging (LiDAR) scanning is provided. The method is performed by a system disposed or included in a vehicle. The method comprises receiving a first laser signal. The first laser signal has a first wavelength. The method further includes generating a second laser signal based on the first laser signal. The second laser signal has a second wavelength. The method further includes providing a plurality of third laser signals based on the second laser signal; and delivering a corresponding third laser signal of the plurality of third laser signals to a respective LiDAR scanner of the plurality of LiDAR scanners. Each of the LiDAR scanners are disposed at a separate location of the vehicle such that each of the LiDAR scanners is capable of scanning a substantial different spatial range from another LiDAR scanner. LiDAR systems can use multi-wavelength to provide other benefits as well.

Abstract: Disclosed are an automatic welding system and method for large structural parts based on hybrid robots and 3D vision. The system comprises a hybrid robot system composed of a mobile robot and an MDOF robot, a 3D vision system, and a welding system used for welding. The rough positioning technique based on a mobile platform and the accurate recognition and positioning technique based on high-accuracy 3D vision are combined, so the working range of the MDOF robot in the XYZ directions is expanded, and flexible welding of large structural parts is realized. The invention adopts 3D vision, thus having better error tolerance and lower requirements for the machining accuracy of workpieces, positioning accuracy of mobile robots and placement accuracy of the workpieces; and the cost is reduced, the flexibility is improved, the working range is expanded, labor is saved, production efficiency is improved, and welding quality is improved.

Abstract: The present invention relates to a method for screening mobile terminal visual attention abnormalities in children based on multimodal data learning. A calibration video and a testing video are set up, and a head-face video of children while watching the calibration video and the testing video on smartphones is recorded, respectively. An eye-tracking estimation model is constructed to predict the fixation point location from the head-face video corresponding to the testing video frame by frame and to extract the eye-tracking features. Facial expression features and head posture features are extracted. A Long Short-Term Memory (LSTM) network is used to fuse different modal features and realize the mapping from multimodal features to category labels. In the testing stage, the head-face video of children to be classified while watching the videos on smartphones is recorded, and the features are extracted and input into the post-training model to determine whether they are abnormal.

Abstract: Drug delivery articles, resident articles, and retrieval systems e.g., for gram-level dosing, are generally provided. In some embodiments, the residence articles are configured for transesophageal administration, transesophageal retrieval, and/or gastric retention to/in a subject. In certain embodiments, the residence article includes dimensions configured for transesophageal administration with a gastric resident system. In some cases, the residence article may be configured to control drug release e.g., with zero-order drug kinetics with no potential for burst release for weeks to months. In some embodiments, the residence articles described herein comprise biocompatible materials and/or are safe for gastric retention. In certain embodiments, the residence article includes dimensions configured for transesophageal retrieval. In some cases, the residence articles described herein may comprise relatively large doses of drug (e.g., greater than or equal to 1 gram).

Abstract: The present disclosure relates to a device and a system for testing flatness. The device for testing flatness includes a base, a testing platform, and a ranging sensor. The testing platform is assembled on the base. The testing platform includes a supporting structure. The supporting structure is disposed on the side of the testing platform away from the base and is used to support a to-be-tested board. The structure matches the structure of the to-be-tested board. The ranging sensor is disposed on the side of the testing platform away from the base. After the to-be-tested board is placed on the testing platform, the ranging sensor is used to test distances between a number N of to-be-tested positions on the to-be-tested board and the ranging sensor, to obtain N pieces of distance information, and the N pieces of distance information are used to determine the flatness of the to-be-tested board, where N is an integer greater than 2.

Abstract: The present disclosure describes a system and method for encoding pulses of light for LiDAR scanning. The system includes a sequence generator, a light source, a modulator, a light detector, a correlator, and a microprocessor. The sequence generator generates a sequence code that the modulator encodes into a pulse of light from the light source. The encoded pulse of light illuminates a surface of an object, in which scattered light from the encoded light pulse is detected. The correlator correlates the scattered light with the sequence code that outputs a peak value associated with a time that the pulse of light is received. The microprocessor is configured to determine a time difference between transmission and reception of the pulse of light based on whether the amplitude of the peak exceeds the threshold value. The microprocessor calculates a distance to the surface of the object based on the time difference.

Abstract: A light ranging and detection (LiDAR) system is provided. The LiDAR system comprises metasurface-based optics. The system comprises a transmitter comprising one or more transmitter optics. The transmitter is configured to provide one or more transmission light beams. The system further comprises a beam steering apparatus optically coupled to the transmitter. The beam steering apparatus comprises one or more steering optics configured to: scan the one or more transmission light beams in at least one of a horizontal and a vertical directions to a field-of-view, and direct return light formed based on the scanned one or more transmission light beams. The system further comprises a receiver comprising one or more receiver optics. At least one of the one or more transmitter optics, the one or more steering optics, and the one or more receiver optics comprise the one or more metasurface-based optics.

Abstract: Embodiments of the present disclosure provide stray light filter structures in light detection and ranging (LiDAR) systems to attenuate stray light and reduce unwanted scattering. In some embodiments, a micro lens array is used together with a pinhole array to block stray light in the optical path just prior to the photodetector. In some embodiments, a bandpass optical filter is used in the optical path prior to the microlens array. In other embodiments, a slit filter is used further upstream in the optical path to block unwanted stray light and allow returning signal light to pass to imaging optics that provide a returning signal light image at a photodetector. In some embodiments, the imaging optics include a collimating lens and a focusing lens. In some embodiments, an optical bandpass filter is positioned on the optical path between the collimating lens and the focusing lens to reject light that is outside of a an expected wavelength range for returning signal light.

Abstract: Embodiments discussed herein refer to LiDAR systems and methods that use a virtual window to monitor for potentially unsafe operation of a laser. If an object is detected within the virtual window, the LiDAR system can be instructed to deactivate laser transmission.

Abstract: A method for determining the pore size and pore size distribution of a filtration membrane comprises: selecting a group of fluorescent pellets having different diameters and emission wavelengths as a reference; plotting the standard curve between the concentration and fluorescence intensity for each fluorescent pellet at its emission wavelength; uniformly dispensing a group of fluorescent pellets as a reference substance in water to prepare a mixed suspension of which the mass concentration of each fluorescent pellet; using the filter membrane to be tested to perform one-time filtration on the mixed suspension prepared, then performing fluorescence detection on the obtained filtrate, calculating the concentration of each fluorescent pellet in the filtrate the retention rate of the filtration membrane to be tested for each fluorescent pellet; and calculating the pore size and pore size distribution of the filter membrane to be tested accordingly.

Abstract: Embodiments discussed herein refer to LiDAR systems that use diode lasers to generate a high-repetition rate and multi-mode light pulse that is input to a fiber optic cable that transmits the light pulse to a scanning system.