Abstract: The disclosure relates to a method, an apparatus, a storage medium, an electronic device, a computer program product, and a computer program for feature extraction, device. The method includes: determining target data for a feature to be extracted, and determining, based on the target data, a plurality of query vectors, a plurality of key vectors, and a plurality of value vectors; determining a plurality of key-value pair information corresponding to each of the query vectors; and performing, for each of the query vectors, a random mapping based on the query vector and the plurality of data samples, to obtain a plurality of random query vectors, and determining feature information corresponding to the query vector based on the plurality of random query vectors and the plurality of key-value pair information.

Abstract: A control device includes a first capacitor, a drive controller, a constant current source, a discharge-controlled current source, a current mirror, and a sample-and-hold circuit. The constant current source generates a constant current. The discharge-controlled current source is coupled to the constant current source and the first capacitor. The current mirror is coupled to the first capacitor and the primary side of a primary-side switch. The current mirror generates a copy current, thereby generating a copy voltage across the first capacitor. When the drive controller turns on the primary-side switch, the sample-and-hold circuit drives the discharge-controlled current source to sample and hold a control current from the constant current and the copy current. When the node voltage is higher than the copy voltage, the comparison circuit drives the drive controller to turn off the primary-side switch.

Abstract: Methods, systems and apparatuses are disclosed including computer readable medium storing instructions used to encode or decode a video or a bitstream encodable or decodable using disclosed steps. The steps include reconstructing a first reference frame and a second reference frame for a current frame to be encoded or decoded, projecting motion vectors of the first reference frame and the second reference frame onto pixels of a current reference frame resulting in a first pixel in the current reference frame being associated with a plurality of projected motion vectors, and selecting a first projected motion vector from the plurality of projected motion vectors as a selected motion vector associated with the first pixel to be used for determining a pixel value of the first pixel, the selection based on magnitudes of the respective ones of the plurality of projected motion vectors.

Abstract: A bidirectional hybrid power conversion system includes a symmetric hybrid unit, a transient state detection unit, a conversion control unit, and a feedback unit. The symmetric hybrid unit converts an input voltage into an output voltage with different conversion ratios. The feedback unit generates a feedback signal according to the output voltage and a reference voltage. The conversion control unit is connected with the symmetric hybrid unit and the feedback unit controls the symmetric hybrid unit to adjust the conversion ratio for regulating the output voltage according to the feedback signal. The transient state detection unit is connected with the feedback unit and the conversion control unit outputs a detection signal to the conversion unit according to the feedback signal. According to the detection signal, the conversion control unit controls the symmetric hybrid unit adjusts the conversion ratio, and converts the input voltage into the output voltage stably.

Abstract: A driving device includes a first current source, a second current source, a first common-mode current elimination (CMCE) circuit, a second common-mode current elimination (CMCE) circuit, a current-to-voltage converter, and a first comparator. The current sources provide constant currents. The current-to-voltage converter includes a first current mirror and a second current mirror. The control terminal of the first current mirror is coupled to the second CMCE circuit. The control terminal of the second current mirror is coupled to the first CMCE circuit. The first current mirror and the second current mirror receive the constant currents, common-mode currents, and differential currents, thereby controlling the first CMCE circuit and the second CMCE circuit to generate a voltage difference that excludes a common-mode voltage corresponding to the common-mode currents. The first comparator receives the voltage difference to drive a field-effect transistor.

Abstract: A device for measuring short-wavelength characteristic X-ray diffraction based on array detection, and a measurement and analysis method based on the device are provided. An array detector of the device only detects and receives a diffraction ray which is diffracted by a material of a to-be-measured part inside a sample and passes through a through hole of a receiving collimator, and rays passing through a positioning hole. The to-be-measured part inside the sample is placed at the center of the diffractometer circle of the device. The method is performed with the device. With the present disclosure, a diffraction pattern of a part inside the sample with a centimeter thickness, i.e. Debye rings, can be rapidly and non-destructively measured, thereby rapidly and non-destructively measuring and analyzing crystal structures, and its crystal structural change of the part inside the sample, such as phase, texture, and stress.

Abstract: Techniques for content-adaptive encoder configuration are described herein. In accordance with various embodiments, a device (e.g., a content-based toolset configurator) including a processor and a non-transitory memory receives one or more frames in a media stream and a performance target of an encoder. The content-based toolset configurator performs cycles of pre-analysis of the one or more frames to generate content features within the performance target, assigns a content class to the one or more frames based on the content features, a previous classification, and the performance target, and sets configurations of the encoder for encoding the one or more frames corresponding to the content class and the performance target.

Abstract: A displaying method and a displaying system for a vehicle, include obtaining a current date; determining whether to set an image of a holiday or anniversary to be displayed on a display of the vehicle by providing a display setting option to select or not to select a display setting option of a user; providing a display setting option and receiving a user's selection of the display setting option; when the display setting option is selected, comparing the obtained current date with preset holiday data and/or the preset anniversary data to determine whether the current date is a holiday corresponding to the preset holiday data, or determine whether the current date is an anniversary corresponding to the preset anniversary data; and displaying a pre-stored image related to the holiday and/or anniversary of the current date on a display of the vehicle.

Abstract: Techniques for content-adaptive encoder configuration are described herein. In accordance with various embodiments, a device (e.g., a content-based toolset configurator) including a processor and a non-transitory memory receives one or more frames in a media stream and a performance target of an encoder. The content-based toolset configurator performs cycles of pre-analysis of the one or more frames to generate content features within the performance target, assigns a content class to the one or more frames based on the content features, a previous classification, and the performance target, and sets configurations of the encoder for encoding the one or more frames corresponding to the content class and the performance target.

Abstract: A diffraction apparatus and a method for non-destructively testing internal crystal orientation uniformity of a workpiece are provided. The apparatus includes: an X-ray irradiation system for irradiating an X-ray to a measured part of a sample under testing, and an X-ray detection system for simultaneously detecting a plurality of diffracted X-rays formed by diffraction of a plurality of parts of the sample under testing, to measure an X-ray diffraction intensity distribution of the sample under testing, where the detected diffracted X-rays are short-wavelength characteristic X-rays, and the X-ray detection system is an array detection system. By the apparatus and the method, the detection efficiency is greatly improved.

Abstract: The present invention relates to a copolyester that includes following structural units: a first chain segment shown in Formula (I): and a second chain segment shown in Formula (II): where the glass transition temperature (Tg) of the copolyester is 60° C. to 83° C. The present invention also provides a polyester fiber or packaging material containing the copolyester.

Abstract: Disclosed in the present disclosure are crystal forms of a fused ring compound, and a composition thereof, a preparation method therefor and use thereof. The crystal forms comprise a crystal form I, a crystal form II, a crystal form III, a crystal form IV and a crystal form V, which have, when using X-ray diffraction, characteristic diffraction peaks at about 11.3 degrees, 17.2 degrees and 21.1 degrees, at about 25.1 degrees, 21.2 degrees and 14.1 degrees, or at about 6.6 degrees, 13.4 degrees and 8.0 degrees, at about 11.8 degrees, 13.3 degrees and 16.7 degrees, and at about 6.5 degrees, 13.3 degrees and 20.0 degrees. The crystal form I or IV is obtained by dissolving a fused ring compound in a proper solvent, followed by stirring, filtering and drying. The use of crystal form I or crystal form IV in preparation of anti-cancer drugs for inhibiting phosphatidylinositol 3-kinase. The use thereof for targeted therapy for tumors, and for anti-inflammation or treatment of autoimmune diseases.

Abstract: A merchant evaluation method includes: acquiring multi-dimensional evaluation index data of a merchant to be evaluated; for the multi-dimensional evaluation index data, obtaining, by calculation based on standard normal distribution, a health portrait of the merchant to be evaluated, and obtaining, by calculation based on a geometric mean, a health score of the merchant to be evaluated, wherein the health portrait is data representing at least one evaluation result of the merchant to be evaluated; and outputting the health portrait and the health score of the merchant to be evaluated.

Abstract: A device for measuring short-wavelength characteristic X-ray diffraction based on array detection, and a measurement and analysis method based on the device are provided. An array detector of the device only detects and receives a diffraction ray which is diffracted by a material of a to-be-measured part inside a sample and passes through a through hole of a receiving collimator, and rays passing through a positioning hole. The to-be-measured part inside the sample is placed at the center of the diffractometer circle of the device. The method is performed with the device. With the present disclosure, a diffraction pattern of a part inside the sample with a centimeter thickness, i.e. Debye rings, can be rapidly and non-destructively measured, thereby rapidly and non-destructively measuring and analyzing crystal structures, and its crystal structural change of the part inside the sample, such as phase, texture, and stress.

Abstract: The present invention relates to a copolyester that includes following structural units: a first chain segment shown in Formula (I): and a second chain segment shown in Formula (II): where the glass transition temperature (Tg) of the copolyester is 60° C. to 83° C. The present invention also provides a polyester fiber or packaging material containing the copolyester.

Abstract: A diffraction device and a method for non-destructive testing of internal crystal orientation uniformity of a workpiece. The diffraction device comprises: an X-ray irradiation system used for irradiating X-ray to a measuring part of a measured sample (4); an X-ray detection system used for detecting a plurality of diffraction X-rays formed by diffracting the X-ray with a plurality of parts of the measured sample (4), to measure X-ray diffraction intensity distribution of the measured sample (4). The detected X-ray is short-wavelength feature X-ray, and the X-ray detection system is an array detection system (5). The method comprises steps of selecting the short-wavelength feature X-ray, performing texture analysis on the measured sample (4), and determining a diffraction vector Q to be measured; and obtaining the X-ray diffraction intensity of the corresponding part of the measured sample (4).

Abstract: Embodiments of the present invention provide a sampling component and a battery module. The sampling component is applied to a battery module and comprises: a busbar having a first surface and a second surface which are opposite to each other, the busbar comprising mounting slots formed by extending in a direction from the first surface to the second surface; a circuit board disposed on a side of the busbar; and, a connecting sheet, comprising a first flat portion and a bent portion which are connected to each other, one end of the first flat portion being connected to the busbar while the other end thereof being connected to the circuit board, the bent portion being located in the mounting slots.

Abstract: A model evaluation method includes obtaining M first audio signals synthesized by using a first to-be-evaluated speech synthesis model, and obtaining N second audio signals generated through recording; performing voiceprint extraction on each of the M first audio signals to obtain M first voiceprint features; performing voiceprint extraction on each of the N second audio signals to obtain N second voiceprint features; clustering the M first voiceprint features to obtain K first central features; clustering the N second voiceprint features to obtain J second central features; counting the cosine distances between the K first central features and the J second central features to obtain a first distance; and evaluating the first to-be-evaluated speech synthesis model based on the first distance.

Abstract: An outer rotor motor direct-drive drilling or milling machine, including a machine base, a frame, a mechanical driving component and an electrical control box component. The frame is installed on the machine base, a mechanical transmission box component is installed on the frame, the electrical control box component is located on the top of the frame. A mechanical driving component includes an mechanical execution component and a lifting mechanism, the mechanical execution component is composed of a hollow shaft outer rotor motor and an output shaft assembly. The output shaft of the output shaft assembly and the hollow shaft of the outer rotor motor are fitted in the form of a key or a spline. This form of cooperation chooses the fit forms that can transmit the speed and torque of the motor and can move the output shaft axially.

Abstract: A merchant evaluation method includes: acquiring multi-dimensional evaluation index data of a merchant to be evaluated; for the multi-dimensional evaluation x data, obtaining, by calculation based on standard normal distribution, a health portrait of the merchant to be evaluated, and obtaining, by calculation based on a geometric mean, a health score of the merchant to be evaluated, wherein the health portrait is data representing at least one evaluation result of the merchant to be evaluated; and outputting the health portrait and the health score of the merchant to be evaluated.