Abstract: A sounding device includes a frame, and a vibration system and a magnetic circuit unit that are retained in the frame. The vibration system includes diaphragm and voice coil. The voice coil includes two first side edges and two second side edges. The magnetic circuit unit includes yoke, main magnetic body, and auxiliary magnetic body. The auxiliary magnetic body includes first auxiliary magnetic bodies each including main body portion and extension portion. The main body portion is recessed towards side surfaces of two first side edges to form grooves, the main magnetic body protrudes towards the grooves, and the pair of first side edges protrude towards the grooves, respectively. The sounding device can not only enable the auxiliary magnetic body to be more evenly surrounding the voice coil, but also enable the voice coil to have longer circumference with a same magnetic circuit area, thereby increasing BL value.

Abstract: Location data is obtained in which an arrival link from which a vehicle can enter a location serving as a destination and an arrival link direction are associated with the location, the arrival link direction indicating a direction in which the vehicle can enter upon entering the location from the arrival link. A cost related to the arrival link is corrected based on the obtained location data. A route to the destination is searched for, using the corrected cost related to the arrival link.

Abstract: A method includes determining that there is a difference between a data distribution of an inference data set and a data distribution of a training data set, where the training data set is a data set used for training an existing artificial intelligence (AI) model, and updating the existing AI model by using the inference data set to obtain an updated AI model.

Abstract: There is provided a regression test method, an electronic device and a storage medium, and relates to the field of artificial intelligence, such as artificial intelligence chips, cloud computing, intelligent voices, or the like. The method includes: when execution of any regression test is completed, determining a to-be-adjusted test case from test cases according to a current test result; and adjusting a randomization weight corresponding to a data range randomized by the to-be-adjusted test case in a current test.

Abstract: The method includes: receiving an encoder signal and a ray machine output beam signal, and initially synchronizing the encoder signal and the ray machine output beam signal; recording coded value M of the encoder at moment tm, and coded value N of the encoder at moment tm+1, where M, N, and m are integers; determining that duration from the moment tm to the moment tm+1 is an actual output beam time interval T of the ray machine, when it is determined that a difference value between the coded value M and the coded value N satisfies preset value a, a being an integer; determining gap time TG in the actual output beam time interval T based on a preset output beam time interval TJ of the imaging system and the actual output beam time interval T; and controlling the ray machine not to emit beam within the gap time TG.

Abstract: A method for providing a substrate coated with a cured damping coating including: applying a curable liquid damping composition to a substrate, wherein said curable liquid damping composition includes an admixture of certain Michael acceptor(s), certain Michael donor(s), a base catalyst; a rheology modifier; and a solid filler; wherein the filler is a different material than the rheology modifier; wherein the curable damping composition has a PVC of from 20% to 70%; and drying/curing the applied curable damping composition at a temperature of from 0° C. to 250° C. is provided. Also provided is a substrate coated with the cured damping coating.

Abstract: Disclosed is a sounding device, including a frame, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm, a framework, a voice coil, and an elastic conductor. The elastic conductor includes an elastic conductor body, a connection arm, and a pad portion. The connection arm includes a first connection portion, a first bending portion, a second connection portion, a second bending portion, and a third connection portion. A covering film is attached to inner and outer surfaces of the connection arm, and the covering film is moved from inside and/or outside surfaces of the first bending portion and the second bending portion. Removal of the covering film reduces the stress on inner and outer surfaces of bent areas, stabilizes bending angles, reduces springback, and makes pad positions precise.

Abstract: The present disclosure belongs to the technical field of separation and purification of glycolic acid, and in particular, to a method and device for separation and purification of glycolic acid by a rectification-crystallization coupling process and use. Bio-based platform compound molecules are used as raw materials to synthesize the glycolic acid, and the obtained crude glycolic acid is separated and purified using the rectification-crystallization coupling process to obtain high-purity glycolic acid. The method initiates system separation and purification under a new glycolic acid synthesis route, which has the difficulty that the glycolic acid is easy to polymerize during concentration, so there are technical barriers to equipment design of vacuum rectification and adjustment of process parameters. In addition, during crystallization, there are technical barriers to equipment design of a crystallization kettle and adjustment of process parameters.

Abstract: The present disclosure discloses a speaker including a frame with two open ends, a vibration system sealing one open end of the frame, a magnetic circuit system, and an air-permeable mesh. The magnetic circuit system includes a yoke sealing another open end of the frame, a first magnet, a second magnet arranged at two opposite sides of the first magnet, a through hole penetrating the yoke and arranged at another two opposite sides of the first magnet, and an extension wall bending and extending from a side of the through hole close to the first magnet in a direction close to the vibration system. The air-permeable mesh is attached to the yoke and covers the through hole. Compared with the related art, the speaker disclosed by the present disclosure has a better acoustic performance.

Abstract: A speaker device includes a frame, a vibration unit and a magnetic circuit unit. The vibration unit includes a diaphragm fixed to the frame and a voice coil. The magnetic circuit unit includes a yoke and a magnet assembly that is accommodated and fixed in the yoke and is spaced apart from the yoke to form a magnetic gap. The voice coil is inserted in the magnetic gap. The yoke includes a yoke bottom wall, a yoke side wall and flanges. The flange includes a first section and a second section extending from the first section. A side of the first section close to the second section and the second section enclose a fixing step. The second section is fixed to the frame. The speaker device of the present disclosure has better reliability.

Abstract: The present disclosure relates to an imaging system and method for radiographic inspection. The imaging system for radiographic inspection includes an inspection area including an imaging area; a first ray source assembly, all the first targets of which are arranged in a first ray source plane; a first detector assembly, the plurality of first detector units of which are arranged in a detector plane, the detector plane and the first ray source plane are spaced apart from each other in a travelling direction of the object under inspection with a predetermined distance; and a ray source control device, configured such that when the region of interest of the object under inspection is at least partially located in the imaging area, the first ray source assembly emits X-rays simultaneously from at least two first targets to the imaging area at the same time.

Abstract: Provided is a method for determining a pregnancy status of a pregnant woman, including: (1) constructing a training set and a selective verification set, each of the training set and the selective verification set being composed of pregnant woman samples each having a known pregnancy status; (2) determining predetermined parameters of each pregnant woman sample in the training set, the predetermined parameters including a concentration of fetal cell-free nucleic acids in peripheral blood and a gestational age in week at which sampling for the peripheral blood is conducted; (3) constructing a prediction model based on the known pregnancy status and the predetermined parameters; (4) determining predetermined parameters of the pregnant woman; and (5) determining the pregnancy status of the pregnant woman based on the predetermined parameters and the constructed prediction model.

Abstract: Nucleic acid sequencing methods and systems, the systems including nanochannel chip including: a nanochannel formed in an upper surface of the nanochannel chip and; a roof covering the nanochannel and comprising nanopores and a field enhancement structure; and a barrier disposed in the nanochannel. The method including: introducing a buffer solution including long-chain nucleic acids to the nanochannel chip; applying a voltage potential across the nanochannel chip to drive the nucleic acids through the nanochannel, towards the barrier, and to translocate the nucleic acids through nanopores adjacent to the barrier, such that bases of each of the nucleic acids pass through the field enhancement structure one base at a time and emerge onto an upper surface of the roof; detecting the Raman spectra of the bases of the nucleic acids as each base passes through the electromagnetic-field enhancement structure; and sequencing the nucleic acids based on the detected Raman spectra.

Abstract: Provided is a vibration system, a sounding device and an electronic device. The vibration system includes a voice membrane, a voice coil configured to drive the voice membrane to vibrate, and a holder having a pad. The voice membrane includes a dome and a first diaphragm arranged around the dome. The dome and the first diaphragm are fixed to the holder. The voice coil is connected to the pad through a lead wire. The dome includes a first end close to the pad and a second end away from the pad and opposite to the first end. The second end has a positioning portion. The holder has a sink configured to receive the positioning portion. The dome is positioned with the holder through engagement of the sink with the positioning portion. Good symmetry of assembly is provided between the holder and the dome in the related art.

Abstract: A transduction unit of a non-contact human sleep physiological parameter detection sensor includes a circuit board, a piezoelectric film and conductive adhesives, wherein the piezoelectric film includes a film sheet and two electrodes, which are respectively arranged on two side faces of the film sheet; the piezoelectric film is attached to the circuit board; and the two electrodes of the piezoelectric film are respectively electrically connected to two exposed pad electrodes on the circuit board by means of the conductive adhesives.

Abstract: An object detection model training method performed by a computing device, includes obtaining a system parameter including at least one of a receptive field of a backbone network, a size of a training image, a size of a to-be-detected object in the training image, a training computing capability, or a complexity of the to-be-detected object, determining a configuration parameter based on the system parameter, establishing a variable convolution network based on the configuration parameter and a feature map of the backbone network, recognizing the to-be-detected object based on a feature of the variable convolution network, and training the backbone network and the variable convolution network, where a convolution core used by any variable convolution layer may be offset in any direction in a process of performing convolution.

Abstract: Driving assistance systems, methods, and programs accept an inputted planned travel route from the route guidance system, provide driving assistance of the vehicle on the planned travel route, based on driving assistance map data, and obtain, when versions of the route guidance map data and the driving assistance map data do not match each other, the driving assistance map data whose version matches the version of the route guidance map data from a map provider. Route guidance systems search for a planned travel route based on route guidance map data, provide guidance on the planned travel route, output the planned travel route to the driving assistance system, and obtain, when versions of the route guidance map data and the driving assistance map data do not match each other, the route guidance map data whose version matches the version of the driving assistance map data from a map provider.

Abstract: A charging facility guidance system is equipped with an electric vehicle and a server device. The electric vehicle is equipped with a first processor transmitting information on a current position and a remaining battery level of the electric vehicle to the server device. The server device is equipped with a second processor calculating a possible cruising distance of the electric vehicle based on the remaining battery level thereof, setting a charging facility search range indicating a range of search for charging facilities for the electric vehicle along a route from a place of departure of the electric vehicle to a destination of the electric vehicle, searching for charging facilities included in the charging facility search range, based on the possible cruising distance, selecting the charging facility located as close as possible to the destination, and transmitting information on the selected charging facility to the electric vehicle.

Abstract: A method for estimating service value spaces of wetland ecosystems includes steps of: calculating service values of wetland ecosystems through a hedonic pricing method; and calculating, based on the service values of the wetland ecosystems, a spatial distribution state of the service values of the wetland ecosystems through a breaking point theory and a weighted Voronoi diagram model, and outputting the spatial distribution state.

Abstract: A sounding device includes a frame, a vibration system, and a magnetic circuit system having a magnetic gap. The vibration system includes a diaphragm fixed to the frame, a voice coil inserted in the magnetic gap to drive the diaphragm to vibrate, a framework connected to the diaphragm, and an elastic conductor fixed to the frame and connected to one side of the framework away from the diaphragm. One end of the voice coil has a lead wire. The framework and the voice coil define a receiving space. The elastic conductor includes an elastic conductor body fixed to the frame, first to third connectors, first and second bending arms. The first bending arm is spaced apart from the second bending arm. The lead wire is fixed to and electrically connected to the third connector. The sounding device has a good consistency in bending size and high pad position precision.