Abstract: A sound transmission method. The sound transmission method includes: according to a plurality of rays emitted to the periphery with an sound source as a center, determining an intersection point set of the plurality of rays and a wall of a building; estimating an sound transmission model of the building according to the intersection point set; and, by means of the sound transmission model, estimating a transmission condition in the wall of the sound emitted by the acoustic source. Also disclosed are a sound transmission apparatus, a non-volatile computer-readable storage medium, a computer program, and a computer program product.

Abstract: A method and apparatus for online bidding, a device, and a medium is provided according to the embodiments of the present disclosure. According to the method, encrypted information from a verification device of a bidding event is received at a participation device of the bidding event. The participation device transmits verification information associated with a bid of the bidding event to a management device of the bidding event. The participation device receives a first signature and a verification information set from the management device. The verification information set includes at least an association relation between the participation device and the verification information. The first signature is generated by the verification device for the verification information set. The participation device verifies a bidding process of the bidding event based on the first signature, the verification information set and the encrypted information.

Abstract: The present disclosure relates to an audio rendering method, an audio rendering device, and an electronic device. The audio rendering method comprises: acquiring scene-related audio metadata, the scene-related audio metadata comprising related information of a sound propagation path between a sound source and a listener; determining a parameter for audio rendering on the basis of the scene-related audio metadata, the parameter for audio rendering comprising an energy attenuation coefficient for each sound propagation path: performing spatial encoding on an audio signal of the sound source on the basis of the parameter for audio rendering to obtain an encoded audio signal; and performing spatial decoding on the encoded audio signal to obtain a decoded audio signal for audio rendering.

Abstract: The present disclosure relates to an audio rendering method, comprising obtaining audio metadata, the audio metadata including acoustic environment information; setting parameters for audio rendering according to the acoustic environment information, the parameters for audio rendering including acoustic information of an approximately rectangular parallelepiped room scene; and rendering an audio signal according to the parameters for audio rendering.

Abstract: The present disclosure relates to the technical field of data processing, and relates to an audio signal processing method and apparatus. The processing method includes: acquiring first audio metadata of an audio signal in an ADM, the first audio metadata corresponding to a first metadata part; acquiring second audio metadata of an audio signal that does not exist in the ADM, the second audio metadata corresponding to a second metadata part; and performing audio rendering on the audio signal according to the first metadata part and the second metadata part.

Abstract: The present disclosure relates to a method for spatial audio rendering. The method comprises: on the basis of metadata, determining a parameter for spatial audio rendering, wherein the metadata comprises at least some information among acoustic environment information, listener spatial information and sound source spatial information, and the parameter for spatial audio rendering indicates a characteristic of sound propagation in a scene in which a listener is located; on the basis of the parameter for spatial audio rendering, processing an audio signal of a sound source, so as to obtain an encoded audio signal; and performing spatial decoding on the encoded audio signal, so as to obtain a decoded audio signal.

Abstract: The present disclosure relates to a signal processing method and apparatus for audio rendering, and an electronic device. The signal processing method for audio rendering comprises: acquiring a response signal set, the response signal set comprising response signals derived from sound signals, wherein the sound signals are signals received at a listening position; and on the basis of perceptual characteristics related to the response signals, processing the response signals in the response signal set to obtain response signals suitable for audio rendering, wherein the number of the response signals suitable for audio rendering is less than or equal to the number of the response signals in the response signal set.

Abstract: The present disclosure relates to the field of audio signal processing, and to an audio signal rendering method and apparatus, and an electronic device. The rendering method includes: estimating a reverberation time of an audio signal on each time point among a plurality of time points; and performing rendering processing on the audio signal according to the reverberation time of the audio signal.

Abstract: An audio rendering system and method and an electronic apparatus. Provided is an audio coding method for audio rendering. The method includes: an acquisition step, which is used for acquiring an audio signal in a specific audio content format, and metadata-related information associated with the audio signal in the specific audio content format; and a coding step, which is used for performing, on the basis of the metadata-related information associated with the audio signal in the specific audio content format, spatial coding on the audio signal in the specific audio content format, so as to obtain a coded audio signal.

Abstract: The present invention relates to an audio rendering system and method and an electronic apparatus. The audio rendering system comprises: an audio signal encoding module, configured to for an audio signal in a specific audio content format, performing spatial encoding on the audio signal in the specific audio content format on the basis of metadata related information associated with the audio signal in the specific audio content format to obtain an encoded audio signal; and an audio signal decoding module, configured to performing spatial decoding on the encoded audio signal to obtain a decoded audio signal for audio rendering.

Abstract: This application provides a method for issuing a digital certificate performed by a digital certificate issuing center that includes a public-private key generation module and an authentication module. The method includes: receiving a public-private key request from a node in a blockchain network; generating a public key and a private key of the node by using the public-private key generation module, and transmitting the public and private keys to the node; receiving the public key of the node and registration information of the node, and authenticating the registration information by using the authentication module; and generating, in accordance with a determination that the authentication succeeds, a digital certificate of the node by using the authentication module, and transmitting the digital certificate to the node. The embodiments of this application can improve the probative value of an issued digital certificate, thereby improving the security of data exchange in a blockchain network.

Abstract: Embodiments of this application disclose methods, systems, and devices for electronic note identifier allocation and electronic note generation. In one aspect, an electronic note identifier allocation method is performed by a processing node of a distributed computer system. The processing node receives an electronic note identifier application request initiated by a service node. The processing node generates an electronic note identifier set in response to the electronic note identifier application request. The processing node also synchronizes the electronic note identifier in the electronic note identifier set. After the synchronizing, the processing node further the electronic note identifier in the electronic note identifier set to the service node.

Abstract: The invention relates to a scintillation material of rare earth orthosilicate doped with a strong electron-affinitive element and its preparation method and application thereof. The chemical formula of the scintillation material of rare earth orthosilicate doped with the strong electron-affinitive element is: RE2(1?x?y+?/2)Ce2xM(2y??)Si(1??)M?O5. In the formula, RE is rare earth ions and M is strong electron-affinitive doping elements; the value of x is 0<x?0.05, the value of y is 0<y?0.015, and the value of ? is 0???10?4; and M is selected from at least one of tungsten, lead, molybdenum, tellurium, antimony, bismuth, mercury, silver, nickel, indium, thallium, niobium, titanium, tantalum, tin, cadmium, technetium, zirconium, rhenium, and gallium Ga.

Abstract: Provided are an audio processing method and apparatus, a readable medium, and an electronic device. The method includes: acquiring an original image captured by a terminal; determining a three-dimensional relative position of a target object relative to the terminal as a first three-dimensional relative position according to the original image; and performing three-dimensional effect processing on a target sound according to the first three-dimensional relative position to enable a sound source position of the target sound in audio obtained after the three-dimensional effect processing and the first three-dimensional relative position to conform to a positional relationship between the target object and a sound effect object corresponding to the target object, where the target sound is an effect sound corresponding to the sound effect object.

Abstract: The invention relates to a scintillation material of rare earth orthosilicate doped with a strong electron-affinitive element and its preparation method and application thereof. The chemical formula of the scintillation material of rare earth orthosilicate doped with the strong electron-affinitive element is: RE2(1?x?y+?/2)Ce2xM(2y??)Si(1??)M?O5. In the formula, RE is rare earth ions and M is strong electron-affinitive doping elements; the value of x is 0<x?0.05, the value of y is 0<y?0.015, and the value of ? is 0???10?4; and M is selected from at least one of tungsten, lead, molybdenum, tellurium, antimony, bismuth, mercury, silver, nickel, indium, thallium, niobium, titanium, tantalum, tin, cadmium, technetium, zirconium, rhenium, and gallium Ga.

Abstract: Embodiments of this application disclose methods, systems, and devices for electronic note identifier allocation and electronic note generation. In one aspect, an electronic note identifier allocation method is performed by a processing node of a distributed computer system. The processing node receives an electronic note identifier application request initiated by a service node. The processing node generates an electronic note identifier set in response to the electronic note identifier application request. The processing node also synchronizes the electronic note identifier in the electronic note identifier set. After the synchronizing, the processing node further the electronic note identifier in the electronic note identifier set to the service node.

Abstract: This application provides a method for issuing a digital certificate performed by a digital certificate issuing center that includes a public-private key generation module and an authentication module. The method includes: receiving a public-private key request from a node in a blockchain network; generating a public key and a private key of the node by using the public-private key generation module, and transmitting the public and private keys to the node; receiving the public key of the node and registration information of the node, and authenticating the registration information by using the authentication module; and generating, in accordance with a determination that the authentication succeeds, a digital certificate of the node by using the authentication module, and transmitting the digital certificate to the node. The embodiments of this application can improve the probative value of an issued digital certificate, thereby improving the security of data exchange in a blockchain network.

Abstract: Disclosed are a tramcar power system and a method for controlling the system, the system comprising: a fuel cell (11) coupled to an unidirectional direct-current converter (14); a super capacitor (12) coupled to a first bi-directional direct-current converter (15); and a power battery (13) coupled to a second bi-directional direct-current converter (16), wherein the unidirectional direct-current converter (14), the first bi-directional direct-current converter (15) and the second bi-directional direct-current converter (16) are coupled to an inverter (18) via a direct-current bus (17); the inverter (18) is coupled to a motor of the tramcar; the fuel cell (11), the super capacitor (12), the power battery (13), the first bi-directional direct-current converter (15), the second bi-directional direct-current converter (16) and the inverter (18) are coupled to a master control unit (19); and the master control unit (19) is coupled to a controlling device of the tramcar.

Abstract: The present invention provides a hybrid power rail vehicle power supply box and a hybrid power rail vehicle. The hybrid power rail vehicle power supply box includes: a closed box body (10); a blowing pipe (2) that is fixedly arranged on one side outside the box body (10), is provided with an inlet (21) and at least one blowing branch pipe (22), and is communicated with the box body (10); a discharging pipe (3) that is fixedly arranged on other side outside the box body (10), is provided with an outlet and at least one discharging branch pipe (32), and is communicated with the box body (10) via the discharging branch pipe (32). The hybrid power rail vehicle power supply box can effectively cool the power supply box, protecting the power pack inside thereof, and satisfying outside mounting requirements of the vehicle.