Abstract: Disclosed are a tweeter and an automobile audio system. The tweeter comprises: a bracket; a diaphragm comprising a top portion and an edge ring; a magnetic motor system; and a voice coil. A first cavity is formed between the top portion of the diaphragm, an inner wall of the voice coil, and the magnetic motor system. The bracket has an annular inner flange and an annular outer flange, the edge ring of the diaphragm is connected to the outer flange of the bracket, and the magnetic motor system is connected to the inner flange of the bracket, so that a second cavity is formed between the edge ring of the diaphragm, an outer wall of the voice coil, and the bracket. A through hole is opened on the voice coil, and the first cavity is in communication with the second cavity by the through hole.

Abstract: The present invention provides a non-real-time data transmission method, including the following steps: periodically carrying out collaborative adjustment of the idle bandwidth occupation; and intermittently measuring an idle bandwidth between every two adjacent collaborative adjustment events of the idle bandwidth occupation and adjusting a data transmission rate according to the measurement results.

Abstract: A sensor circuit that is capable of sensing of neural action potentials is disclosed. The circuit can be designed to minimize power dissipation and total silicon area so that it can be incorporated into a massively parallel sensor array and ultimately implanted in the body (e.g., into the brain) in a safe manner. The circuit can also be designed to be tunable such that it can be optimized in silico prior to fabrication and can be optimized through the use of controllable current sources after fabrication.

Abstract: A wireless communication method and apparatus, and a radio frequency subsystem are provided. The apparatus includes a local oscillator circuit, configured to provide a local oscillator signal; a radio frequency transmitter coupled to the local oscillator circuit, configured to send a first signal on a first carrier based on the local oscillator signal provided by the local oscillator circuit; a radio frequency receiver coupled to the local oscillator circuit, configured to receive a second signal on a second carrier based on a local oscillator signal of a same frequency as the local oscillator signal provided by the local oscillator circuit; and a digital frequency converter coupled to the radio frequency transmitter and the radio frequency receiver, configured to provide a digital frequency conversion operation to compensate for a frequency difference between a center frequency of the first carrier and a center frequency of the second carrier.

Abstract: A heat dissipation structure, for cooling a vehicle charging device, is provided and includes a cover body, a housing and a flow channel structure. The housing includes a bottom wall, an inlet end and an outlet end. The cover body is hermetically sealed to the bottom wall of the housing. The inlet end and the outlet end are respectively disposed on at least one sidewall of the housing. The flow channel structure is disposed in the housing and includes a first channel and at least one second channel communicating with each other. The inlet end communicates with the first channel. The outlet end communicates with the at least one second channel. The first channel is formed between the bottom wall of the housing and the cover body, and the at least one second channel rises from the first channel. A vehicle charging device is also provided.

Abstract: The present disclosure relates to electronic devices and communication systems. One example electronic device includes a power divider array that includes a general input port and a plurality of branch output ports. The power divider array has a filter mode and a power splitter mode that are switchable. In the power splitter mode, the power divider array is configured to implement power distribution of a signal from the general input port to the plurality of branch output ports. In the filter mode, the power divider array is configured to filter a signal transmitted between the general input port and the plurality of branch output ports.

Abstract: Disclosed are an advanced persistent threat (APT) detection method and system based on a continuous-time dynamic heterogeneous graph network (CDHGN). The method includes: selecting network interaction event data, extracting entities from the network interaction event data as source nodes and target nodes, extracting an interaction event occurring between a source node and a target node as an edge, and determining a type and an attribute of a node, a type and an attribute of the edge, and a moment at which an interaction event occurs, to obtain a continuous-time dynamic heterogeneous graph; converting each type of edge in the continuous-time dynamic heterogeneous graph into a vector by a CDHGN encoder, to obtain an embedding representation by a CDHGN decoder to obtain a detection result of whether each type of edge is an abnormal edge, to intercept an APT attack.

Abstract: An electric motorcycle includes a frame assembly, a front wheel assembly, a rear wheel assembly and a battery compartment assembly. The frame assembly includes a casing and a seat assembled on the casing. The front wheel assembly is fixed on a first end of the frame assembly. The rear wheel assembly is fixed on a second end of the frame assembly. The battery compartment assembly is fixed on the casing and includes a battery pack and a compartment body to house the battery pack. The compartment body is integrally arranged with the casing. The battery pack is insertable and mounted in the compartment body. The casing is provided with a first receiving portion and a second receiving portion. A bottom of the seat is correspondingly provided with a first locking portion and a second locking portion to be clamped with the first receiving portion and second receiving portion.

Abstract: A cooling system, including an outer casing, a chassis, a heat source, and a cooling unit, is provided. The outer casing has a first surface and includes a water inlet and a water outlet arranged on the first surface. The chassis is disposed in the outer casing. The heat source is disposed in the chassis. The cooling unit contacts the chassis and is configured to cool the heat source. A rack including the cooling system is also provided.

Abstract: The present application relates to the field of pharmaceutical preparations and relates to [1,2,4]triazolo [1,5-a]pyridine compounds and their isomers or pharmaceutically acceptable salts or their crystal forms, as well as local topical preparations and their applications in skin diseases. Specifically, it relates to a local topical formulations of compound (S)—N-(5-(2-(2,2-difluorocyclopropanecarbonyl)-2-nitrospiro[3.5]non-7-yl)-[1,2,4-triazole[1,5-a]pyridine-2-yl) cyclopropaneformamide and its isomers or pharmaceutically acceptable salts or crystal forms, and their applications in skin diseases. The preferred skin diseases include psoriasis, atopic dermatitis, vitiligo, lupus erythematosus, alopecia areata, eczema, contact dermatitis, urticaria, pompholyxs, dermatomyositis, scleroderma, acne, and seborrheic dermatitis.

Abstract: A mixed rare earth concentrate mineral and suspended mineral phase transformation-clean leaching system and a method thereof achieve low-temperature phasing transformation of a rare earth mineral. The system includes a Venturi dryer, a multi-stage separator, a suspension preheating decomposition furnace, a multi-state fluidization sealing valve, a mineral phase transformation machine, a ball mill, a multi-stage acid leaching tank, an alkali leaching tank and a neutralization tank.

Abstract: Disclosed is a test method for measuring a force situation of a tree-shaped spatial node, and the test method is realized by a reaction frame device. The reaction frame device includes a raft foundation and a reaction frame fixedly mounted on the raft foundation, a cavity is formed inside the reaction frame to accommodate a tree-shaped spatial node; a main pipe of the tree-shaped spatial node is plumb-fastened to the raft foundation, and a force measurement assembly is arranged in an upper space of the cavity, which can simultaneously apply force of a set value to each branch pipe in the tree-shaped spatial node and detect a combined force applied to the tree-shaped spatial node. The method can simultaneously and accurately apply static force to each branch pipe, thereby effectively predicting the overall working condition of the tree-shaped spatial node.

Abstract: A communication device includes a first radio frequency circuit; a plurality of second radio frequency circuits; and a power division/combination network, including a signal combining port and a plurality of signal dividing ports, where the signal combining port is coupled to the first radio frequency circuit, and the plurality of signal dividing ports is coupled to the plurality of second radio frequency circuits. The power division/combination network includes a power divider/combiner. Two ends of a first signal transmission network in the power divider/combiner are coupled to a common port and a first dividing port respectively, two ends of a second signal transmission network are coupled to the common port and a second dividing port respectively, and a mode tuning circuit is coupled to the first signal transmission network.

Abstract: A control method for impedance spectrum measurement of a battery is disclosed. The battery outputs a power via a DC-DC converter. The control method includes (i) sending a first signal, wherein the first signal indicates a conduction mode of the DC-DC converter to be set, and the conduction mode includes a discontinuous conduction mode or a critical conduction mode, (ii) receiving a current measurement value and a voltage measurement value at an output end of the battery, and (iii) calculating an impedance spectrum of the battery based on the received current measurement value and the received voltage measurement value. A control device and a system for impedance spectrum measurement of a battery, a computer-readable storage medium, a computer program product, a vehicle electronic control unit, and a vehicle is also disclosed.

Abstract: A liquid cooling system includes a liquid cooling cabinet, a server immersed in a cooling liquid of the liquid cooling cabinet, a dry cooler, a heat exchanger, a refrigeration device and a controller. The liquid cooling cabinet is connected to the dry cooler to form a natural cold source refrigeration circulation branch. An auxiliary refrigeration circulation branch includes a first circulation branch formed by connecting the liquid cooling cabinet to a hot side of the heat exchanger and a second circulation branch formed by connecting a cold side of the heat exchanger to the refrigeration device. The heat exchanger is connected in parallel with the dry cooler. The controller is configured to control opening or closing of the communication of refrigeration circulation branches including the natural cold source refrigeration circulation branch and the auxiliary refrigeration circulation branch to enter different refrigeration modes.

Abstract: Provided are methods of preparing a circular RNA, comprising providing a template DNA, wherein the template DNA comprises a sequence encoding a precursor RNA, in a reaction solution to allow synthesis of precursor RNA by in vitro transcription of the template DNA and allowing the precursor RNA to self-splice, thereby producing a circular RNA, wherein the in vitro transcription of the template DNA and the self-splicing (i.e., circularization) of the precursor RNA are carried out in the same reaction solution under the same reaction conditions (e.g., the same reaction temperature). The method can be carried out in a single reaction vessel and does not require a step of purifying the precursor RNA before allowing the precursor RNA to self-splice.

Abstract: Embodiments of this application relate to an integrated circuit, a chip, and a terminal, and relate to the field of circuit technologies. An example integrated circuit includes a first inductor and a second inductor. The first inductor includes a first coil, and the first coil is a loop having a first opening. The second inductor includes a second coil and a third coil that are connected in series, and the second coil has a second opening. A magnetic field direction of the second coil is opposite to a magnetic field direction of the third coil. The second coil and the third coil are nested in the first coil, and the first inductor is not in direct contact with the second inductor.

Abstract: A speech signal processing method includes: acquiring a speech observation signal collected by a speech collection device; pre-separating the speech observation signal to obtain a first pre-separation signal and a second pre-separation signal, wherein a first distance between a sound source of the first pre-separation signal and the speech collection device is different from a second distance between a sound source of the second pre-separation signal and the speech collection device; and performing blind source separation on the speech observation signal according to the first pre-separation signal to obtain a first source speech signal of the sound source of the first pre-separation signal; and performing blind source separation on the speech observation signal according to the second pre-separation signal to obtain a second source speech signal of the sound source of the second pre-separation signal.

Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: The terminal device generates capability information, where the capability information includes an overall frequency separation class of the terminal device, and the overall frequency separation class indicates a maximum frequency separation between a lowest component carrier and a highest component carrier included in an uplink component carrier and a downlink component carrier supported by the terminal device; and the terminal device sends the capability information to the network device.

Abstract: A method for preparing a weathered coal-derived humic acid/urea-formaldehyde slow-release fertilizer granule by reactive extrusion process with depolymerization-activation-polycondensation trinity is provided. In an alkaline environment, paraformaldehyde is depolymerized into formaldehyde small molecules, which react with urea to form monohydroxymethylurea and dihydroxymethylurea. Under the strong shearing action of screws of the twin-screw reactive extruder, the macromolecular weathered coal-derived humic acid is depolymerized into relatively small molecule weathered coal-derived humic acid, and abundant active carboxyl groups are exposed, some of which immediately undergo dehydration condensation with —NH2 on the urea-formaldehyde molecule produced by the polycondensation of hydroxymethylurea during the reactive extrusion process to generate weathered coal-derived humic acid/urea-formaldehyde and its granules.