Abstract: Embodiments of the present disclosure disclose a method for managing personnel safety at a smart gas pipeline network station based on Internet of Things, wherein the method is executed by a smart gas safety management platform of a system for managing personnel safety at a smart gas pipeline network station based on Internet of Things, comprising: obtaining dispatching data of a gas station; determining a reference personnel frequency of a target region, based on the dispatching data; and in response to a first difference not meeting a first preset condition, giving a first warning, and triggering a risk monitoring; wherein the risk monitoring includes: obtaining monitoring data based on a preset monitoring parameter; determining a risk degree of the target region based on the monitoring data; and in response to the risk degree meeting a second preset condition, giving a second warning.

Abstract: Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable stor-age media for hybrid automatic repeat request acknowledgement (HARQ ACK) feedback for sidelink communications. In example embodiments, a first device determines a time window to be used by a second device to transmit HARQ ACK feedback for sidelink transmission from the first device to the second device. Then, the first device transmits an indication of the time window to the second device. Further, the first device monitors the HARQ ACK feedback from the second device within the time window.

Abstract: Pilot symbols and data symbols of a communication frame for an OTFS transmission system are two-dimensionally arranged along the points of a grid in the delay-Doppler domain. The pilot symbols are surrounded by guard symbols. The number of guard symbols in each direction of the Doppler domain is twice the number of the basis expansion modelling (BEM) basis functions used for modelling the communication channel in a receiver, and twice the maximum time delay in terms of delay bins in each direction of the delay domain. The receiver performs an initial pilot-aided channel estimation using BEM of a first BEM order and using the pilot signals, followed by an initial estimation of data symbols using the initial channel estimation, and iteratively performs data aided channel estimation using BEM of a second BEM order and at least the received data signals, until a termination criterion is met.

Abstract: Embodiments of the present disclosure relate to a short control signaling transmission for sidelink communication in an unlicensed spectrum. According to one aspect of the present disclosure, if a control signaling is to be transmitted to a second device via a short control signaling transmission, a first device determines whether the short control signaling transmission is available based on at least information related to a counter, the counter being used for counting occasions within a period for the short control signaling transmission at a sidelink interface. If the short control signaling transmission is available, the first device transmits the control signaling to the second device on a first resource configured for the short control signaling transmission. In this way, constraints for the usage of the short control signaling transmission can be satisfied, and a reliable transmission of sidelink control signaling in the unlicensed spectrum can be achieved.

Abstract: The embodiment of the present disclosure provides a method and an Internet of Things (IoT) system for safety monitoring and early warning of a smart gas pipeline network. The method includes: obtaining basic monitoring information; identifying abnormal information in the basic monitoring information; determining at least one abnormal information distribution map; determining a change feature of the abnormal information along a direction of the pipeline network; determining a monitoring point whose change feature meets a preset change condition and an abnormal information type of the monitoring point as at least one key monitoring point and a monitoring content of the at least one key monitoring point; determining an inspection plan and a performance allocation plan; adjusting a preset monitoring frequency of distributed monitoring components located at different key monitoring points and at areas surrounding the different key monitoring points; and generating an alarm message.

Abstract: An ambient image projection device includes a light source assembly, a first projection mechanism and a second projection mechanism provided side by side; the first projection mechanism includes a display and a first optical module, a content played on the display is guided by the first optical module to form a dynamic image to be projected in space; the second projection mechanism includes an interference lens and a second optical module, light emitted from the light source assembly is guided by the second optical module to pass through the interference lens and forms an interference pattern to be projected in space; the interference pattern and the dynamic image overlap at least partially with each other in the space. The device provides more stereoscopic dynamic visual experience by projecting images via a display.

Abstract: The present disclosure provides methods and systems for assessing a pipeline failure based on a smart gas Internet of Things (IoT). The method is implemented by a smart gas safety management platform of an IoT system for smart gas pipeline network safety management, and the method includes obtaining at least one first failure risk in a gas pipeline and a downstream user feature, generating a plurality of candidate gas processing schemes based on the at least one first failure risk, and determining at least one second failure risk based on the at least one first failure risk and at least one of the candidate gas processing schemes.

Abstract: The present disclosure discloses a personalized mattress system and a mattress customization method. The personalized mattress system includes a client, an adjustable mattress device, and a cloud, wherein the client includes a user login unit, a user personal customization unit, a mattress control unit, and a data communication unit; the adjustable mattress device includes a data communication unit, a main control unit, an algorithm unit, a sensing unit, an adjustment unit, and a local data storage unit; and the adjustable mattress device acquires user customization information from the client or the cloud through the data communication unit and perform mattress adjustment.

Abstract: A method and a smart gas Internet of things (IoT) system for metering anti-interference of a gas ultrasonic meter. The IoT system including a smart gas user platform, a smart gas service platform, a smart gas sensing network platform, a smart gas object platform, and a smart gas device management platform. The method may be performed by the smart gas device management platform. The method may include: transmitting at least two sound waves of different frequencies at at least two time-dividing points and receiving at least two echo signals by the gas ultrasonic meter. The at least two time-dividing points may be determined at least based on time-dividing point correlation data; determining, based on the at least two echo signals, a gas flow difference; determining, based on the gas flow difference, whether a noise interference exists; and in response to a determination that the noise interference exists, adjusting a gas metering strategy.

Abstract: The present invention provides a method for reasonably adjusting an end-of-discharge voltage of a lithium battery with attenuation of a battery life. The method includes: acquiring an end-of-charge voltage, an end-of-discharge voltage and a rated capacity based on a basic parameter table for a lithium battery, then setting a safety end-of-charge voltage and a safety end-of-discharge voltage to obtain an initial safety discharge capacity, and finally setting a preset discharge capacity of the battery; using an Ampere-hour integration method to estimate a discharged power, taking the preset discharge capacity as a discharge standard, and stopping discharge when the discharged power reaches the preset discharge capacity; and the safety discharge capacity being gradually less than the preset discharge capacity within a battery life cycle, and the battery stopping discharge when the voltage reaches the safety end-of-discharge voltage.

Abstract: The present application discloses a display backplane and a display device. The display backplane includes a plurality of light-emitting sub-areas; each of the light-emitting sub-areas is provided with at least two light-emitting portions; a first light-guiding portion is arranged in each of the light-emitting sub-areas and is located between the at least two light-emitting portions, and a side of the first light-guiding portion close to the light-emitting elements has a second light-reflecting surface, and an orthographic projection of a portion of a side of the first light-guiding portion away from the substrate on the substrate falls within an orthographic projection of a portion of a side of the first light-guiding portion close to the substrate on the substrate.

Abstract: There is provided an apparatus, said apparatus comprising means for providing first control information using a first control channel and at least second control information using a second control channel, wherein the first control information comprises at least an indication of resource reservation for an associated data channel and the second control information comprises at least transmission format information for the associated data channel, wherein the associated data channel comprises periodic or aperiodic data traffic.

Abstract: The present disclosure provides a security authentication method, system and device for IoV communication based on a national cryptographic algorithm. The method of the present disclosure includes: constructing, by an on-board unit, an identity authentication request message for transmitting to a road side unit; receiving, by the on-board unit, an identity authentication response message, and verifying a signature; and if the verification is successful, calculating, by the on-board unit, a session key and a hash value thereof, and constructing an acknowledgment message for transmitting to the road side unit, where the acknowledgment message is used in calculating a session key and a hash value thereof by the road side unit for contrast verification; if hash values are equal, security authentication is successful and a session key is generated; and if the hash values are not equal, the security authentication is failed.

Abstract: A data processing method and apparatus, applied to the field of electronic maps. Coverage information of a roadside device is stored in a map, so that content of the map is enriched, and the map can meet a higher-level use requirement of a user. The coverage information includes coverage region information that indicates at least one coverage region of the roadside device and coverage capability information that indicates a coverage capability of the roadside device in the at least one coverage region. The coverage information can be used to generate a control signal for controlling a vehicle, so that safety of autonomous driving or assisted driving can be improved.

Abstract: A composite quantum-dot optical film comprises a quantum-dot layer and a substrate, wherein the substrate comprises a unitary body formed by a first material, wherein a plurality of particles are disposed in the unitary body that encapsulates an outer surface of a first particle with said outer surface of the first particle being located above the top surface of the unitary body, wherein the substrate is disposed over the quantum-dot layer.

Abstract: The present disclosure belongs to the technical field of Internet of vehicles (IoV) security and provides an IoV intrusion detection method and device based on an improved convolutional neural network. The method of the present disclosure includes: collecting original data of data traffic during IoV communication, and inputting the original data to a data dimension reduction algorithm model for IoV intrusion detection for preprocessing to obtain standardized data for IoV data analysis; inputting the standardized data for IoV data analysis to an improved convolutional neural network model for calculation, including: performing convolutional calculation and nonlinear activation on the input data for layering; performing two convolutional operations, two pooling operations and one full connection operation on each layer of data; and classifying a data set output by the improved convolutional neural network model through a SoftMax layer.

Abstract: The present disclosure provides a case for an electronic device and a magnetic assembly. The case includes a side wall, a back wall connected with the side wall to define a receiving cavity for receiving the electronic device, and a magnetic assembly, the magnetic assembly includes a support member connected with the side wall or the back wall, and a magnetic alignment member, the support member is capable of moving relative to the side wall or the back wall, so as to support the case, the magnetic alignment member is detachably or fixedly connected with the support member connected with the back wall or the side wall. The case of the present disclosure is convenient to use.

Abstract: A Lactobacillus paracasei and uses thereof. The Lactobacillus paracasei has a deposit number of CGMCC No. 14813. The Lactobacillus paracasei can be used for increasing the amount of an organic acid in a raw material. The Lactobacillus paracasei can be used for fermenting the raw material, where the raw material can be selected from at least one of fruits, which can increase the content of the organic acid in a fermented product.

Abstract: Disclosed are a highly adaptable viscosity-reducing polycarboxylate water reducer and its preparation method and application. The highly adaptable viscosity-reducing polycarboxylate water reducer is composed of a polymer and water, and the polymer accounts for 30-50 wt %; since the main chain of the polymer contains a hydrophobic benzene ring and hydrophilic amine, the polymer has strong rigidity and good solubility in an aqueous solution, and is rich in two adsorption groups of carboxyl group/phosphono group. The highly adaptable viscosity-reducing polycarboxylate water reducer of the present invention has excellent water-reducing and slump retention properties and is suitable for general construction projects and commercial concrete projects.

Abstract: An X-ray high-absorptivity detection system and an image imaging method are provided. The system comprises a fluorescent layer, a light source for emitting X-rays towards the fluorescent layer, a first visible light sensor, a second visible light sensor, a first image acquisition device, a second image acquisition device. First visible photons moving towards the first visible light sensor and second visible photons moving towards the second visible light sensor are generated under the excitation of X photons; the first image acquisition device is configured for obtaining a first image signal by the first visible light sensor acquiring a first visible photon signal, and the second image acquisition device is configured for obtaining a second image signal by the second visible light sensor acquiring a second visible photon signal; an X-ray image signal is obtained by an addition operation on the two image signals.