Abstract: The disclosure relates to a method for using fuel cell. The fuel cell includes a container, wherein the container comprises a housing and a nozzle, and the housing defines through holes; the housing defines a chamber and an opening; the nozzle has a first end in air/fluid communication with the opening and a second end; and a membrane electrode assembly, which is flexible, on the container to form a curved membrane electrode assembly surrounding the chamber and covering the through holes, wherein the membrane electrode assembly comprises a proton exchange membrane having a first surface and a second surface, a cathode electrode on the first surface and an anode electrode on the second surface. The method includes at least partially immersing the fuel cell in a fuel; and supplying an oxidizing gas into the chamber.

Abstract: In some examples, a method determines an open/close status of a pivotable barrier on a moveable platform based on selective use of a plurality of different filters for filtering measurement data from a sensor device.

Abstract: A system for hand tracking may comprise a head mounted display wearable by a user and a hand tracking camera module attached to the head mounted display and comprising at least one of a pair of stereo cameras or a depth camera. The hand tracking camera module may be configured to capture images of at least one physical hand of the user. The head mounted display may be configured to render a virtual hand resembling the physical hand in a virtual environment for viewing by the user based at least on the images.

Abstract: Disclosed in the present invention is a preparation method for a polyester, relating to the technical field of organic catalysis and polymeric materials. The preparation method in the present invention comprises: (1) using pyridine and saccharin in a ratio of 1:1 to prepare pyridine saccharin salt in tetrahydrofuran at 60° C. and separating the pyridine saccharin salt out in methanol and hexane. (2) Freeing out a small amount of pyridine from the pyridine saccharin salt in a heating state, catalyzing by the pyridine saccharin salt and pyridine a cyclic lactone or a carbonate to be ring-opened and polymerized to form the polyester; and the system has no other compound residues. (3) In the presence of an alcohol initiator, catalyzing by the pyridine saccharin salt the cyclic lactone to be ring-opened and polymerized to obtain the polyester. The catalytic system can efficiently synthesize a specific polylactone.

Abstract: A method for selecting a matching partner for a costarring video is performed by a terminal. The terminal obtains a first video recorded by a first user and a plurality of second videos in which a second role matching the first role is played by a respective second user. After obtaining a matching score between the first video and the plurality of second videos in each user type, the terminal ranks the second videos in which the second role is played by the second users for each user type and displays a ranking result of the second videos in which the second role is played for each user type. After obtaining a user selection of a second video according to the ranking result, the terminal synthesizes a complete video from the first video and the user-selected second video and plays the complete video.

Abstract: Disclosed is a method for preparing polylactone by ring opening, belonging to the technical fields of organic catalysis and polymer materials. The invention proposes a new catalytic mechanism, wherein an organic alcohol is used as an initiator to initiate ring opening polymerization of a cyclic monomer under the catalysis of an organic catalyst to obtain a polylactone; and the catalyst is a pyridinium salt. The present invention has the advantages of non-toxic reaction, simple conditions and controllable process; further, the invention can obtain a narrow molecular weight distribution in the absence of solution polymerization, and can effectively inhibit the occurrence of the transesterification compared with the catalysis of 4-(N,N-dimethylamino)pyridine.

Abstract: In some examples, a sensor device is to mount to a barrier pivotable between an open position and a closed position, the barrier being on a moveable platform. The sensor device includes an accelerometer to measure acceleration data and a rotation sensor to measure rotation about an axis. The sensor device includes at least one processor configured to determine an open/close status of the barrier based on the acceleration data and the rotation data, and an orientation of the moveable platform.

Abstract: A method at a computing device, the method including obtaining a cargo load signal measurement; and applying an estimator to the cargo load signal measurement, the estimator being in the form of {circumflex over (x)}=ay+bZ, where {circumflex over (x)} is an estimate of a true signal vector, y is the cargo load signal measurement, Z is a calculated or pre-determined reference vector, and a and b are weighting factors.

Abstract: Aspects of the disclosure provide methods and apparatuses for generating video data. In some examples, an apparatus for generating the video data includes processing circuitry. The processing circuitry obtains tempo information from audio data that is inserted in a target video. The processing circuitry determines a plurality of target tempo points in the tempo information according to video effect time description information included in a video effect description file. The video effect description file includes video effect data that is used to adjust one or more video frames of an original video. The processing circuitry obtains the one or more video frames from the original video according to the plurality of target tempo points. The processing circuitry adjusts the one or more video frames with the video effect data. The processing circuitry generates the target video including the adjusted one or more video frames and the audio data.

Abstract: A method at a sensor apparatus, the method including calculating a value for a target function based on at least one sensor of the sensor apparatus; determining that the value of the target function is within a defined threshold range for a defined time period, thereby finding an in-flight state for the sensor apparatus; and turning off transmission from a radio of the sensor apparatus based on the in-flight state.

Abstract: Embodiments described herein provide various examples of an automatic obstacle avoidance system for unmanned vehicles using embedded stereo vision techniques. In one aspect, an UAV capable of performing autonomous obstacle detection and avoidance is disclosed. This UAV includes: a stereo vision camera set coupled to the one or more processors and the memory to capture a sequence of stereo images; and a stereo vision module configured to: receive a pair of stereo images captured by a pair of stereo vision cameras; perform a border cropping operation on the pair of stereo images to obtain a pair of cropped stereo images; perform a subsampling operation on the pair of cropped stereo images to obtain a pair of subsampled stereo images; and perform a dense stereo matching operation on the pair of subsampled stereo images to generate a dense three-dimensional (3D) point map of a space corresponding to the pair of stereo images.

Abstract: A method for selecting a matching partner for a costarring video is performed by a terminal. The terminal obtains a first video recorded by a first user and a plurality of second videos in which a second role matching the first role is played by a respective second user. After obtaining a matching score between the first video and the plurality of second videos in each user type, the terminal ranks the second videos in which the second role is played by the second users for each user type and displays a ranking result of the second videos in which the second role is played for each user type. After obtaining a user selection of a second video according to the ranking result, the terminal synthesizes a complete video from the first video and the user-selected second video and plays the complete video.

Abstract: Embodiments described herein provide examples of a real-time visual object tracking system. In one aspect, an UAV capable of performing real-time visual tracking of a moving object includes a processor; a memory coupled to the processor; and a camera coupled to the processor and the memory and to capture a video of the moving object. This UAV additionally includes a visual tracking module to: receive a first video image and a first location of the object; receive a second video image following the first video image; place a first search window in the first video image and a second search window in the second video image at the same location as the first search window; compute a correlation between an image patch within the first search window and an image patch within the second search window; and determine an updated location of the object in the second video image.

Abstract: A method for cargo load detection in a container by a computing device, the method including projecting at least one light dot within an array of light dots towards a surface of the container; capturing an image of the at least one light dot on the surface of the container; and using the captured image to determine cargo loading within the container.

Abstract: A partner matching method in a costarring video is performed by a terminal. The terminal obtains a video recorded by a first user identifier and a video in which a second role that matches the first role is played and an associated second user identifier. After obtaining a total score of videos in which the second role is played by each second user identifier in each user type, the terminal ranks the videos in which the second role is played by the second user identifiers for each user type and displays a ranking result of the videos in which the second role is played for each user type. After obtaining a video selected from the ranking result, the terminal synthesizes a complete video from the selected video in which the second role is played and the video in which the first role is played.

Abstract: The present disclosure is directed to a novel class of peptide-like oligomers called peptide tertiary amides (PTAs) and a combinatorial library of PTAs along with synthetic routes for the preparation of large combinatorial libraries of these compounds. The peptide tertiary amides provide an exceptional source of high affinity and selective protein ligands that are useful as tools for biological research and as drug leads, among others.

Abstract: A method for cargo load detection in a container by a computing device, the method including projecting at least one light dot within an array of light dots towards a surface of the container; capturing an image of the at least one light dot on the surface of the container; and using the captured image to determine cargo loading within the container.

Abstract: The invention discloses an application of hydroxypropyl methyl cellulose in preparation of medicines for treating esophageal mucosa. The invention discloses a hydroxypropyl methyl cellulose-containing composition which comprises the following ingredients: 1-28 weight parts of hydroxypropyl methyl cellulose and 1000 weight parts of purified water. A preparation method includes steps of adding the hydroxypropyl methyl cellulose, by stirring, into the purified water in an amount which accounts for 40% of the total amount of water used to obtain a mixed material, continuously stirring the mixed material until the mixed material is completely swelling and turning into a transparent solution, adding the remaining purified water to obtain a mixture, and stirring the mixture to obtain the hydroxypropyl methyl cellulose-containing composition.

Abstract: A video processing method, a video processing device, and a storage medium are provided. The video processing method includes: determining target image frames corresponding to a dynamic special effect in a video and determining an attribute of a special effect element corresponding to the dynamic special effect in each of the target image frames and coordinates of the special effect element. The video processing method also includes: rendering the special effect element on a drawing interface based on the attribute and the coordinates of the special effect element; filling the target image frames into the drawing interface as a background and forming drawing interface frames with the dynamic special effect; and outputting the drawing interface frames corresponding to each of the target image frames.