Abstract: A high-strength and high-toughness Al—Cu series cast aluminum alloy, a preparation method therefor, and the use of same in wheel hub manufacturing. Chemical components of the high-strength and high-toughness Al—Cu series cast aluminum alloy comprise the following elements in percentage by mass: 4.6-5.3% of Cu, 0.45-0.55% of Mn, 0.42-0.55% of Mg, 0.15-0.25% of Ti, 0.05-0.15% of Zr, and 0.003-0.011% of B; the chemical components of the high-strength and high-toughness Al—Cu series cast aluminum alloy further comprising Fe and Si in percentage by mass, 0.03<Fe?0.2%, the mass ratio of Fe:Si being (2-6):1, and the balance being Al and inevitable impurities. The high-strength and high-toughness Al—Cu series cast aluminum alloy has low cost, satisfies the market requirements on aluminum alloy parts such as vehicle wheel hubs, and therefore is of important significance in accelerating weight reduction of vehicles and achieving the objects of energy conservation and emission reduction.

Abstract: The embodiments of the present disclosure provide methods and Internet of Things systems for maintaining a low-temperature pipeline based on smart gas. The method may be implemented by a smart gas safety management platform of an Internet of Things system for maintaining the low-temperature pipeline based on smart gas. The method may include: obtaining gas data and pipeline data of each segment of a gas pipeline and weather data of a position of each segment of the gas pipeline; determining at least one target pipeline; determining icing data of the at least one target pipeline based on the gas data, the pipeline data, and the weather data; and generating a thawing instruction based on the icing data, and controlling a natural gas heating device to perform a thawing operation on the at least one target pipeline based on the thawing instruction.

Abstract: Provide are a method, IoT system, and storage medium for smart gas construction supervision.

Abstract: Disclosed is a method for managing gas data, which is implemented by at least one processor of an Internet of Things (IoT) system for managing the gas data. The method comprises: obtaining to-be-stored-gas data and downstream user features; determining a user importance level based on the downstream user features; determining accessing frequency distribution features of the to-be-stored-gas data; determining a risk degree of data through a second prediction model; constructing query feature vectors based on pipeline data, and determining a risk degree of the gas pipeline based on the query feature vectors; determining a gas data level; determining a data redundancy level; generating redundant data blocks of the to-be-stored-gas data; and storing the to-be-stored gas data and the redundant data blocks in the at least one storage node of the at least one sub-data center based on loading distribution features.

Abstract: Provided in embodiments of the present disclosure are a method and apparatus for accessing a cell served by a base station, a storage medium, and an electronic device. The method includes: a first request message is sent to a relay node, wherein the first request message is used for requesting the relay node to relay a signal between a terminal and the base station; a synchronization signal of the base station relayed by the relay node is received; and an access signal is sent to the base station by the relay node after receiving the synchronization signal, wherein the access signal is used for accessing the cell served by the base station.

Abstract: Embodiments of present disclosure provides a method and an Internet of Things (IoT) system for supervising a smart gas corporate user, and a medium thereof. The method includes determining a production phase and a production energy efficiency of a corporate user based on corporate user information, production status information, and current gas data; generating a gas supervision parameter based on the production phase and the production energy efficiency; sending the gas supervision parameter to a monitoring device; and monitoring gas data of the corporate user based on a data monitoring frequency and uploading the monitored gas data to a gas management platform at a data uploading frequency by the gas device object platform, and uploading the monitored gas data to a governmental supervision and management platform by the gas management platform.

Abstract: Provided are a sound gathering device for voiceprint monitoring and a preparation method. The sound gathering device is a cone structure and includes a front end portion (1) and a rear end portion (2), the front end portion (1) is trumpet-shaped, an inner wall surface of the front end portion (1) is present a pattern array of a microstructure (3), and the microstructure (3) presenting the pattern array is formed through laser etching. A sound wave frequency monitored by the sound gathering device is 50 Hz˜10 kHz, and a sound wave enters the sound gathering device from an entrance of the front end portion (1), is reflected through the pattern array of the microstructure (3) on the inner wall surface of the front end portion (1), and is transmitted from an exit of the rear end portion (2), and a sound pressure of the exit of the rear end portion (2) is 4 times˜8 times a sound pressure of the entrance of the front end portion (1).

Abstract: Disclosed is method and system for safety monitoring of pipeline operation status based on smart gas IoT.

Abstract: Disclosed is a method for predicting demand for maintenance materials of a smart gas pipeline network. The method comprises: obtaining a pipeline network feature of a gas pipeline network; predicting fault probabilities of one or more point positions of the gas pipeline network based on the pipeline network feature, the fault probabilities including probabilities of one or more preset fault types of faults occurring at the point positions; determining sub-demand for the maintenance materials of each point position based on the fault probability of each point position of the one or more point positions, the sub-demand being obtained based on historical maintenance data of the gas pipeline network; determining the demand for the maintenance materials based on the sub-demand of each point position of the gas pipeline network; and transmitting the demand for the maintenance materials to the smart gas user platform based on the smart gas service platform.

Abstract: The embodiment of the present disclosure provides a method for setting time of traffic lights in a smart city and an Internet of Things system. The method is implemented by an Internet of Things system for setting time of traffic lights in a smart city, which includes a user platform, a service platform, a management platform, a sensor network platform, and an object platform. The method includes: obtaining pedestrian information and intersection information of a target intersection, and the target intersection being an intersection provided with the traffic lights; determining, based on the pedestrian information and the intersection information, the scheme for setting time of the traffic lights at the target intersection; and sending a control instruction corresponding to the scheme for setting the time to the object platform, and in response to the received control instruction, controlling lighting duration of the traffic lights by the object platform.

Abstract: Example embodiments of the present disclosure provide a method and an Internet of Things system for gas demand information management based on smart gas. The method includes obtaining gas monitoring data from a plurality of channels; obtaining estimated demand data of a gas enterprise; and generating a monitoring adjustment instruction and a data export instruction based on the gas monitoring data and the estimated demand data; sending the data export instruction to the gas monitoring device corresponding to the at least one channel based on the gas user object platform, the gas equipment object platform, and/or the gas user platform; and causing the gas monitoring device corresponding to the at least one channel to export, based on the data export instruction, the flow log file from a log storage unit to the gas user object platform, the gas equipment object platform, and/or the gas user platform.

Abstract: The present application provides a method and system, a device, and a medium. The method for information processing includes: obtaining an information processing state, wherein the information processing state is used for characterizing a processing state for target information, and the target information is generated according to input information on a dialogue page of a digital assistant; determining, according to the information processing state, display content matched with the information processing state; and displaying, on the dialogue page of the digital assistant, the display content matched with the information processing state. The method reduces the interaction complexity of users in a human-computer dialogue process and improve the operation experience of users.

Abstract: A driving method for an electronic paper display device is provided, belongs to the field of display technology, and can solve the problem of ghost in the existing electronic paper display device. A driving stage of the electronic paper display device includes a first shaking stage including a first sub-shaking stage; the balance stage is before the display stage. The method includes: based on a to-be-displayed image, applying first, second and third driving signals to first electrodes in macrostructures to display black, white and red, respectively; applying a voltage signal to the second electrodes, the voltage signal includes an alternating second pulse signal in which positive, zero and negative voltages are sequentially alternated in the first sub-shaking stage; the first and second pulse signals are equal in an absolute value of an active voltage and are opposite to each other in voltage polarity.

Abstract: Provided are an information mapping method, an information acquisition method, a terminal device, and a network device. The information mapping method includes mapping at least one information domain of channel state information to at least one field of uplink control information, dividing the at least one field into a first partial field and a second partial field, generating a first bit sequence based on the first partial field, and generating a second bit sequence based on the second partial field.

Abstract: Disclosed is a method for guaranteeing a smart gas demand based on a regulatory Internet of Things (IoT). The method is executed by a gas company management platform. The method includes: obtaining a plurality of grid regions by gridding a regulatory scope; predicting a gas demand degree of each of the plurality of grid regions in a future time period based on weather data, people flow data, historical gas data, and a gas consumption plan, and an authenticity degree of the gas consumption plan; determining a scheduling parameter based on the gas demand degree and schedulable resource data in the future time period; and generating a scheduling instruction based on the scheduling parameter, and sending the scheduling instruction to a terminal device corresponding to a schedulable resource device.

Abstract: An antenna according to an embodiment of the present disclosure includes a first substrate, the first substrate includes: a first base substrate; at least one first radiation unit on a side of the first base substrate; a first electrode layer on a side of the first base substrate away from the at least one first radiation unit; and at least one second radiation unit on a side of the at least one first radiation unit away from the first electrode layer; wherein an orthographic projection of each second radiation unit on the first base substrate at least partially overlaps an orthographic projection of one first radiation unit on the first base substrate; and an orthographic projection of the at least one first radiation unit on the first base substrate is within an orthographic projection of the first electrode layer on the first base substrate.

Abstract: The embodiments of the present disclosure provide methods and Internet of Things systems for managing traffic road cleaning in smart city. The method is executed by a traffic management platform, comprising: obtaining a road video captured by an imaging device on a road during a time period; extracting a target image from the road video and processing the target image through a prediction model to predict a road cleanliness; processing the road video in the time period and predicting a flow corresponding to the road; and controlling a road sweeper to clean the road based on the flow and the road cleanliness.

Abstract: Provided are an information transmission method and device, and a storage medium. An information transmission method applied to a first communication node includes that: configuration information of a second communication node is received; and channel state information is reported to the second communication node according to the configuration information. The channel state information includes a precoding matrix indicator, a precoding matrix corresponding to the precoding matrix indicator includes a combination of a first coefficient and a first group of vectors or a combination of a first coefficient, a first group of vectors and a second group of vectors.

Abstract: A posture recognition method is applied to a mobile terminal, the mobile terminal includes a visual inertial unit and an accompanying unit different from the visual inertial unit, and the accompanying unit is started earlier than the visual inertial unit. The method includes: acquiring by the accompanying unit initialization parameters used by the visual inertial unit for initialization when the mobile terminal is in a stable state; and acquiring by the visual inertial unit the initialization parameters from the accompanying unit when an initialization condition is met, and initializing the visual inertial unit based on the acquired initialization parameters, to output posture data of the mobile terminal based on an initialization result.

Abstract: The present disclosure provides a method, an Internet of Things system and medium for early warning smart gas harmful components.