Abstract: Systems and techniques may be used for allowing a person access to a secure area, opening a door, or the like. A technique may include detecting a person within a particular distance of a secure area, capturing, using a camera, a set of images of at least a facial feature of the person, preprocessing the set of images to identify the facial feature in at least one image of the set of images, and identifying, using processing circuitry, a gaze status of the person based on the identified facial feature in the at least one image.

Abstract: A method of operating a seamless physical access control (PAC) system includes receiving, by a verification device of the PAC system, credential information from a credential device; receiving inertial measurement unit (IMU) information from the credential device; receiving video data from another device different from the credential device, the video data including images of one or more persons; and correlating movement of the one or more persons detected in the video data with the received IMU information to identify a person in the video data as a holder in possession of the credential device.

Abstract: Systems and techniques may be used for allowing a person access to a secure area, opening a door, or the like. A technique may include detecting a person within a particular distance of a secure area, capturing, using a camera, a set of images of at least a facial feature of the person, preprocessing the set of images to identify the facial feature in at least one image of the set of images, and identifying, using processing circuitry, a gaze status of the person based on the identified facial feature in the at least one image. The technique may include determining, using a trained machine learning model, an intent of the person to access the secure area based on the gaze status, and based on determining the intent, granting access to the secure area.

Abstract: Methods and program code for determining a location of a device within an environment and for calibrating the environment. Example computer readable medium for determining a location of a device within an environment comprises program code that when executed by one or more processors, causes the one or more processors to determine a current path signature for a device moving within an environment, compare the current path signature with a stored reference path signature corresponding to a location of interest (LOI) within the environment, and if it is determined that the current path signature corresponds to the stored reference path signature, determine the location of the device to be the same as a location of the LOI within the environment.

Abstract: Methods and program code for determining the position and/or intent of a user (or device) holding, carrying, wearing, or mounted with a UWB-enabled device. Example computer readable medium for determining the position and/or intent of a user comprises program code that when executed by one or more processors, causes the one or more processors to determine a current temporal signature for a first device moving within an environment; compare the current temporal signature with at least a portion of a stored reference temporal signature corresponding to a secure asset within the environment; and base an access control decision corresponding to the secure asset on whether it is determined that the current temporal signature corresponds to the at least a portion of the stored reference temporal signature.

Abstract: Systems and techniques may be used for allowing a person access to a secure area, opening a door, or the like. A technique may include detecting a person within a particular distance of a secure area, capturing, using a camera, a set of images of at least a facial feature of the person, preprocessing the set of images to identify the facial feature in at least one image of the set of images, and identifying, using processing circuitry, a gaze status of the person based on the identified facial feature in the at least one image.

Abstract: A method for extracting and analyzing spatial information of a control and protection zone of rail transit with multiple threshold constraints, including the following steps: 1, performing format conversion on a data file and extracting a plurality of coordinate points; 2, selecting key points from the plurality of coordinate points for data simplification to obtain a simplified limit line, a simplified outer structure edge line and a simplified boundary line of construction; 3, programming the simplified limit line, the simplified outer structure edge line, and the simplified boundary line of construction, calling a database, and reading data therefrom for spatial relationship comparison; 4, determining whether the construction of a rail-involved construction project intrudes into a control and protection zone of rail transit according to a result of the spatial relationship comparison, thus completing the extraction and analysis of the spatial information of the control and protection zone of rail transit.

Abstract: An artificial blood vessel and a method for preparing the same are disclosed. The method includes: weaving warp yarns and weft yarns to form interlaced first and second weaves, both weaves extend along a weft direction and alternate to obtain a composite fabric; and successively corrugating and thermal-setting the composite fabric to obtain the artificial blood vessel. In the composite structure of the artificial blood vessel with the alternating the first and second weaves formed by the warp and weft yarns, a softness degree of the first weave is lower than that of the second weave. As a result, combining stiffness of the first weave with softness of the second weave, this composite structure ensures both low permeability and increased softness of the fabric. Therefore, it is improved to a certain extent over the conventional woven artificial blood vessels and is easier to handle and suture.

Abstract: The present invention provides a point cloud data acquisition method and device under a situation of no GNSS signal. The method comprises: re-sampling line data acquired from a topographic map to obtain discrete line data; generating a full-second PPS pulse in a simulating manner; counting by using a distance measuring instrument, sampling the count, when it is detected that the full-second PPS pulse is received, calculating position information at a current moment; simulating a GNSS satellite protocol according to the position information at the current moment; parsing the GNSS satellite protocol by using a point cloud data acquisition module to complete time synchronization, and controlling a LiDAR to acquire point cloud data; parsing the GNSS satellite protocol by using an inertial measurement module, and recording attitude determination positioning data in real time to generate POS data; and optimizing the POS data to obtain accurate point cloud data.

Abstract: A method for extracting and analyzing spatial information of a control and protection zone of rail transit with multiple threshold constraints, including the following steps: 1, performing format conversion on a data file and extracting a plurality of coordinate points; 2, selecting key points from the plurality of coordinate points for data simplification to obtain a simplified limit line, a simplified outer structure edge line and a simplified boundary line of construction; 3, programming the simplified limit line, the simplified outer structure edge line, and the simplified boundary line of construction, calling a database, and reading data therefrom for spatial relationship comparison; 4, determining whether the construction of a rail-involved construction project intrudes into a control and protection zone of rail transit according to a result of the spatial relationship comparison, thus completing the extraction and analysis of the spatial information of the control and protection zone of rail transit.

Abstract: The present invention provides a point cloud data acquisition method and device under a situation of no GNSS signal. The method comprises: re-sampling line data acquired from a topographic map to obtain discrete line data; generating a full-second PPS pulse in a simulating manner; counting by using a distance measuring instrument, sampling the count, when it is detected that the full-second PPS pulse is received, calculating position information at a current moment; simulating a GNSS satellite protocol according to the position information at the current moment; parsing the GNSS satellite protocol by using a point cloud data acquisition module to complete time synchronization, and controlling a LiDAR to acquire point cloud data; parsing the GNSS satellite protocol by using an inertial measurement module, and recording attitude determination positioning data in real time to generate POS data; and optimizing the POS data to obtain accurate point cloud data.

Abstract: Disclosed are a system and method for micro-nano machining by femtosecond laser two-photon polymerization. The system includes: a femtosecond laser, an external light path modulation unit, an image capture apparatus, a focusing lens, a displacement platform, a computer and a monitoring apparatus, where the image capture apparatus is configured to capture cross-section graphs of a three-dimensional micro-nano device layer by layer, so that modulated femtosecond lasers form parallel beams arranged according to all layers of the cross-section graphs.

Abstract: Disclosed are a system and method for micro-nano machining by femtosecond laser two-photon polymerization. The system includes: a femtosecond laser, an external light path modulation unit, an image capture apparatus, a focusing lens, a displacement platform, a computer and a monitoring apparatus, where the image capture apparatus is configured to capture cross-section graphs of a three-dimensional micro-nano device layer by layer, so that modulated femtosecond lasers form parallel beams arranged according to all layers of the cross-section graphs.

Abstract: A nano-imprinting template, a system, and an imprinting method are provided. The nano-imprinting template (10) comprises: a first baseplate (100) transparent to ultraviolet light; an imprinting pattern structure (105) formed on the first surface of the first baseplate (100); a heating element (110) formed on the second surface, opposite to the first surface, of the first baseplate (100), wherein the heating element (110) is transparent to ultraviolet light; and a first electrode pair (115) formed on the second surface and used for supplying a current applied by an external power supply to the heating element (110) so as to make the heating part (110) generate heat. The nano-imprinting template (10) and the system seamlessly integrate an ultraviolet curing nano-imprinting technology with a thermoplastic nano-imprinting technology, which have the advantages of small size of equipment, low cost, simple process and the like.