Abstract: A geometric parameter measurement method and a device thereof, an augmented reality device, and a storage medium are provided. The geometric parameter measurement method includes: acquiring a left eye image and a right eye image upon a user gazing at a target object, and determining a left eye sight line and a right eye sight line based on the left eye image and the right eye image, which images are acquired upon the user gazing at the target object; determining, according to the left eye sight line and the right eye sight line, a convergence point of the left eye sight line and the right eye sight line; and calculating geometric parameters of the target object in a case where the convergence point coincides with a desired position on the target object.

Abstract: The invention provides a photonic chip comprising: a silicon substrate, an low refractive index layer above the silicon substrate, and a tapered waveguide above the low refractive index layer, the tapered waveguide having a first height at a first end of the tapered waveguide and a second height at a second end of the tapered waveguide, the second height being greater than the first height, and the tapered waveguide having a bottom surface that is closer to the substrate at the second end than at the first end.

Abstract: The invention provides a closed-loop spinal cord electrical stimulation system, including a spinal epidural electrical stimulation electrode, a low limb electrical stimulation electrode, a closed-loop electrical stimulator and a controller. The spinal epidural electrical stimulation electrode, the low limb electrical stimulation electrode and the controller are electrically connected to the closed-loop electrical stimulator respectively. The spinal epidural electrical stimulation electrode is used for applying a first electrical stimulation to the spinal epidural site, and the low limb electrical stimulation electrode is used for applying a second electrical stimulation to a low limb. The voltage of the first electric stimulation is 400-600 mV, the voltage of the second electric stimulation is 1 V-1.5 V, and the stimulation frequency of the both is 10-20 Hz.

Abstract: The invention provides a fat composition enriched with medium-and long-chain triacylglycerol and its preparation process. As for fatty acid composition, the content of medium-chain fatty acids and long-chain fatty acids reach above 99%, the content of short-chain fatty acids is less than 1%, and the mass ratio of long-chain fatty acids to medium-chain fatty acids is from 1.2:1 to 3:1. As for triacylglycerol composition, the triacylglycerol containing one medium-chain fatty acid and two long-chain fatty acids makes up 50-90% of the total triacylglycerol; the triacylglycerol containing two medium-chain fatty acids and one long-chain fatty acid makes up 3-35% of the total triacylglycerol; the triacylglycerol containing three medium-chain fatty acids makes up 0-10% of the total triacylglycerol. The fat composition has better oxidation stability and fat digestion and absorption rate, meeting the needs of particular groups of infants and young children.

Abstract: A method according to certain embodiments generally involves operating a system including an unmanned aerial vehicle (UAV) and a base station. The base station includes a nest including an upper opening having an upper opening diameter and a lower opening having a lower opening diameter less than the upper opening diameter. The lower opening is accessible from within the base station. The method generally includes landing the UAV within the nest such that a portion of the UAV is accessible via the lower opening, releasably attaching a load to the UAV, and operating the UAV to deliver the load to a destination.

Abstract: Method and system for demonstrating a function of a vehicle-mounted heads up display are disclosed. The method includes setting a projection region for displaying a first image, obtaining relative position and relative size relationships between the projection region and the virtual display region, projecting the first image in the projection region, capturing a second image of the first image, generating a virtual recognition region in the second image, determining whether an object in the second image is located within the virtual recognition region, and determining, in a case that the object is located within the virtual recognition region, a first position of the object within the virtual recognition region, determining, based on the first position, a display position of a virtual marker representative of the object within the virtual display region, and displaying the virtual marker at the display position within the virtual display region.

Abstract: A banknote conveying module and a banknote adding machine thereof.

Abstract: An unmanned aerial vehicle according to certain embodiments generally includes a chassis, a power supply mounted to the chassis, a control system operable to receive power from the power supply, at least one rotor operable to generate lift under control of the control system, and a winch mounted to the chassis. The winch includes a reel and a motor. The reel has a line wound thereon, the line having a free end. The reel includes a circumferential channel in which a wound portion of the line is wound onto the reel. The circumferential channel includes an inner portion, an outer portion, and a passage connecting the inner portion and the outer portion. The motor is operable to rotate the reel under control of the control system to thereby cause the line to wind onto and off of the reel, thereby causing the free end of the line to raise and lower.

Abstract: An example charging station for an unmanned aerial vehicle (UAV), the charging station generally including a nest and a charging device. The nest includes an upper portion and a lower portion. The upper portion defines an upper opening sized and shaped to receive a landing apparatus of the UAV, and a diameter of the nest reduces from a first diameter at the upper opening to a second diameter at the lower portion. The charging device is mounted in the nest, and includes a first contact pad and a second contact pad. The charging device is configured to apply a voltage differential across the first contact pad and the second contact pad such that the charging station is operable to charge a power supply of the UAV via the landing apparatus.

Abstract: Systems and methods for predicting that a stock keeping unit (SKU) is likely to be scrapped and performing preventative actions accordingly. The system receives a request to initiate a process related to predicting scrap likelihood associated with a plurality of SKUs, inputs data associated with each SKU into a trained prediction model, outputs, from the trained prediction model, a prediction value for each SKU, measures the trained prediction model by calculating a set of values, and generates a matrix comprising the calculated set of values. Using the matrix, a threshold prediction value is determined, and each SKU prediction value is compared to the threshold prediction value. Based on the comparison, a SKU of the plurality of SKUs is predicted as likely to be scrapped and at least one of a plurality of preventative actions is performed.

Abstract: The present invention refers to a photocurable composition comprising at least one polythiol having at least two thiol groups, at least one polyisocyanate having at least two isocyanate groups, at least one epoxy compound having at least one epoxy group, and at least one photolatent base catalyst. Furthermore, the present invention pertains to a method of photo-curing the photo-curable composition according to the present invention as well as to a method of three dimensional printing an object with the photocurable composition according to the present invention.

Abstract: An optical film, a fabrication method thereof, a windshield, and a driving apparatus, which pertains to the field of in-vehicle devices. The optical film includes a birefringent layer. The birefringent layer splits light transmitted through the optical film into two light beams, and exit directions of the two light beams are different from each other. A head up display is disposed above an instrument panel, and the optical film is disposed on a windshield. Light incident into an automobile through the windshield is split into two light beams. By adjusting relative positions of the head up display and the optical film, it is possible to enable only one of the light beams to be incident into the head up display. Since the total amount of light entering the head up display is reduced, the temperature rise inside the head up display can be mitigated.

Abstract: This invention relates to a method for detecting faults in the operating states of a surgical robotic system, wherein the surgical robotic system including a master computer, a master embedded computer and a plurality of slave embedded computers is provided; the master computer controls the master embedded computer and the slave embedded computers via the LAN router; the master embedded computer communicates with the slave embedded computers via the LAN router and a first communication bus. In the present invention, the master computer, the master embedded computer and the slave embedded computers can detect faults interactively. Safety and reliability of the operation of the surgical robotic system can be improved without increasing any additional detection components, and communication burden of the system can be effectively reduced. The present invention can be widely applied to a minimally invasive surgical robotic system.

Abstract: Provided is an image distortion detection method including: controlling an image output device to output a test image; shooting the test image by an image acquisition apparatus to obtain an imaged picture, the imaged picture being a picture shot when the image acquisition apparatus focuses on an imaging position of the image output device, and the image acquisition apparatus being arranged at a set viewpoint of the image output device; and determining whether image distortion meets a requirement based on widths of lines in the imaged picture. Embodiments of the present disclosure can be used for detecting depth-of-field distortion of the image output by the image output device.

Abstract: Disclosed is a method for inducing direct reprogramming of urine cells into renal progenitor cells and a pharmaceutical composition including the renal progenitor cells reprogrammed by the method for preventing or treating renal cell injury disease. The method can make the mass production of customized reprogrammed renal progenitor cells by using urine cells, which are somatic cells easily and repeatedly obtainable without inconvenience and pain and as such, can be applied to incurable disease fields expandable to the renal injury therapy and kidney regeneration fields and to the production of cell therapy products.

Abstract: Methods and compositions for quantifying the cellular concentration of cyclic adenosine monophosphate (cAMP), cyclic guanine monophosphate (cGMP), glutathione, glucose, and glutamine in a single cell include the use of conjugates and analogs in immunofluorescent assays for on-chip quantification. These metabolite immunofluorescent assays may be incorporated with proteomic assays for simultaneous single cell analysis of metabolites and proteins.

Abstract: Techniques are disclosed for improving user experience of multimedia streaming over computer networks. For example, a method for presenting multimedia content may generally include receiving a request to stream a media title. In response to the request, unencrypted content for the media title is streamed to a client. While streaming the unencrypted content, a digital rights management (DRM) license to access encrypted content for the media title is requested. After receiving the DRM license, the client switches from streaming the unencrypted content for the media title to streaming encrypted content for the media title. The switching from streaming the unencrypted content to streaming the encrypted content does not interrupt playback of the media title.

Abstract: Perovskite single crystal X-ray radiation detector devices including an X-ray wavelength-responsive active layer including an organolead trihalide perovskite single crystal, a substrate layer comprising an oxide, and a binding layer disposed between the active layer and the substrate layer. The binding layer including a binding molecule having a first functional group that bonds to the organolead trihalide perovskite single crystal and a second functional group that bonds with the oxide. Inclusion of the binding layer advantageously reduces device noise while retaining signal intensity.

Abstract: A preparation method of a copper-based graphene composite with high thermal conductivity is provided. A new electrodeposited solution is used for direct current (DC) electrodeposition at a reasonable electrodeposition frequency, which fabricates a new copper-based graphene composite with high tensile strength and thermal conductivity. The copper-based graphene composite prepared by electrodeposition has high thermal conductivity of 390-1112 W/(m·k) and tensile strength of 300-450 MPa, which meets the requirements in the field of thermal conduction.

Abstract: A dibenzoheterocyclic compound having a structure shown in a formula wherein the dibenzoheterocyclic compound has a low LUMO energy level and can be matched with an electron transport material favorable for injection and transport of electrons. The dibenzoheterocyclic compound has hole transport performance. As a light-emitting layer material, the dibenzoheterocyclic compound balances the ratio of electrons to holes in a light-emitting layer increasing the combination probability and improving the light-emitting efficiency of a device. The spatial configuration of the dibenzoheterocyclic compound avoids stacking of material molecules, avoiding generation of high energy excitons due to energy transfer among molecules, reducing annihilation of excitons, and inhibiting efficiency roll-off. The dibenzoheterocyclic compound has thermal stability, so blue light can be emitted efficiently and stably.