Abstract: Provided are a data collection method and apparatus, network device, and storage medium. The method includes: receiving, by a first network data analytics function (NWDAF), a first message sent by a consumer, the first message is provided for requesting or subscribing to an NWDAF analytics service, wherein the first message includes a first parameter, the first parameter at least including at least one of: an event identifier (ID), a data collection time parameter, or area information; inquiring, by the first NWDAF through a first network device before starting data collection, whether an existing NWDAF is collecting or has already stored data matching the first parameter, and executing, by the first NWDAF, a corresponding data collection strategy according to an inquiry result.

Abstract: The present disclosure provides a method and an Internet of Things system for gas usage monitoring and warning based on smart gas, the method is performed by a smart gas safety management platform of an Internet of Things system for gas usage monitoring and warning based on smart gas, comprising: obtaining gas usage data from at least one gas device, based on the gas usage data, determining a gas monitoring object from the at least one gas device; determining initial objects based on the gas monitoring object and a gas usage threshold; processing historical gas data of the initial objects by using an evaluation model to determine suspicions of the initial objects, wherein the evaluation model is a machine learning model; and sending gas usage safety warning information to a gas user corresponding to the target object.

Abstract: The present disclosure provides a method for indoor gas leakage disposal of smart gas and an Internet of Things system. The method is implemented by a smart gas indoor safety management sub platform. The method includes obtaining monitoring information and user description information from a smart gas data center, the monitoring information including alarm information and gas terminal monitoring data, the monitoring information being obtained from a smart gas object platform through a smart gas sensor network platform, the user description information including user-defined alarm information uploaded by a user, and the user description information being obtained from a smart gas user platform through a smart gas service platform; determining a cause of gas leakage based on the monitoring information and the user description information; and determining a plurality of candidate solutions based on the cause of gas leakage.

Abstract: A server includes a server module and an expansion module, the server module includes a first tray provided with a first connecting mechanism, a first circuit board mounted on the first tray, and a top cover covered on the first tray for enclosing the first circuit board between the first tray and the top cover; the expansion module includes a second tray provided with a second connecting mechanism matching with the first connecting mechanism and a second circuit board mounted on the second tray, the second circuit board is electrically connected to the first circuit board. A server system is also provided.

Abstract: The present disclosure relates to an excavator, a precise control method and system therefor, a vehicle terminal and a storage medium. The precise control method for the excavator comprises: presetting a plurality of work modes of the excavator, and an action rate and action coefficient corresponding to each working mode of the plurality of work modes; and performing work mode switching according to a handle input signal.

Abstract: The present disclosure provides an industrial Internet of Things for controlling a supply of accessories and control methods. The industrial Internet of Things comprises a user platform, a service platform, a management platform, a sensor network platform, and an object platform interacting in sequence. The object platform is configured to include different accessory supply devices, each of which is configured with a data collector. The sensor network platform receives and sends accessory supply data to different management sub-platforms. The different management sub-platforms receive the different accessory supply data, after data processing, store and send at least one processing result data to different service sub-platforms. The different service sub-platforms receive and send corresponding processing result data to the user platform separately. The user platform generates a first instruction to a corresponding service sub-platform based on the at least one processing result data.

Abstract: A display panel, a displaying device and a wearable device. The display panel includes a displaying region and a peripheral region surrounding the displaying region, a region of the peripheral region other than the bonding sub-region includes a first testing-unit group and a second testing-unit group, and each of the first testing-unit group and the second testing-unit group includes one or more circuit testing units; the displaying region includes a first lateral side and a second lateral side that extend in a first direction and face each other, the first direction refers to a direction from the bonding sub-region pointing to the displaying region; and a maximum distance from the first testing-unit group to the first lateral side in a direction perpendicular to the first direction is equal to a maximum distance from the second testing-unit group to the second lateral side in the direction perpendicular to the first direction.

Abstract: A lens assembly for display includes a display, a lens assembly, and a prism assembly. The display emits a first light beam. The lens assembly includes a first, second, and third lenses. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces and the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces. The lens assembly for display satisfies at least one of following conditions: 0.60?Din/TTL?0.75; 0.28?Din/f123?0.35; 4.56 mm?Din?5.02 mm; wherein Din is an effective optical diameter of the light incident surface, TTL is an interval from the light incident surface to the light emitting surface along the optical axis, and f123 is an effective focal length of a combination of the first lens, the second lens, and the third lens.

Abstract: Disclosed is a compound method of shear-wave elastography (SWE) and quasi-static elastography (QSE). The method includes: firstly, pre-scanning is carried out on a target region to obtain a rough comparison relation curve, then real-time scanning is carried out. The rough comparison relation curve is optimized and corrected to obtain an accurate comparison relation curve. Finally, the real-time shear modulus of a large area is calculated according to the real-time elastic relative value of the large area, so that accurate real-time elastography is realized.

Abstract: The present disclosure relates to a method for establishing an electronic fence for an excavator, wherein the excavator includes a frame, a slewing platform rotatably mounted on the frame, a working arm mounted on the slewing platform in a pitching swinging manner, and a bucket rotatably mounted on the working arm. The working arm includes a first working arm hinged to the slewing platform and a second working arm hinged to the first working arm. An end, away from the first working arm, of the second working arm is hinged to the bucket.

Abstract: Disclosed is an ultrasonic Doppler flow imaging method. The method includes: using eigen decomposition on an ultrasonic image to obtain eigenvectors matrices with different power values, so that the SNR and power distribution of each point of the ultrasonic image are calculated, thereby accurately extracting flow data with high reliability and obtaining accurate and stable flow images. The method has the beneficial effects of filtering out tissue signals and noise signals on the characteristic dimension, so as to better extract flow data by using eigen decomposition on ultrasonic images, retaining complete flow data and providing stable and clear imaging of fine flow without the need of contrast agent injection that may cause injuries to human bodies.

Abstract: Method and an IoT system for gas gate station monitoring are provided. The method includes obtaining operation data of a gas gate station; obtaining a downstream user feature corresponding to the gas gate station and historical warning data corresponding to the gas gate station; determining, based on the downstream user feature and the historical warning data and in combination with the operation data, the associated node in a preset time period, the associated node including at least one of a gate station internal node and an external pipeline network node; obtaining monitoring data of the associated nodes, the monitoring data at least including node monitoring data of the gate station internal node and node monitoring data of the external pipeline network node; and issuing a warning notification in response to the monitoring data not satisfying a preset condition.

Abstract: A data caching method comprises: receiving message data returned by a second device in response to a read command; dividing the message data into two paths of data according to a preset strategy, sending one of the two paths of data to a first random access memory for storage, and distributing the other path to a double data rate synchronous dynamic random access memory for storage through a first input first output queue, wherein a sum of a working bandwidth of the first random access memory and a working bandwidth of the double data rate synchronous dynamic random access memory is greater than or equal to a receiving bandwidth of the message data; and sending data stored in the first random access memory and data stored in the double data rate synchronous dynamic random access memory to a first device connected with network equipment.

Abstract: A method for preparing a nano spherical oxide dispersion strengthening phase using a micron oxide is proposed for the first time. First, a micron oxide is used as a raw material to prepare a nano oxide with a completely amorphous structure/matrix alloy composite powder by mechanical ball milling in stages. In the first stage, ball milling is performed, causing the oxide to break and transform in structure, and achieving nano-sizing and completely amorphization, to prepare a composite powder with a completely amorphous structure nano oxide uniformly distributed in the matrix alloy powder; and in the second stage, the composite powder obtained in the first stage and the remaining matrix alloy powder are uniformly mixed by ball milling. Then, the uniformly mixed powder is sequentially subjected to hot forming, hot rolling, and heat treatment, to obtain a nano spherical oxide dispersion strengthened alloy.

Abstract: The present disclosure discloses an Industrial Internet of Things for determining a material transportation path, a control method and a medium thereof, wherein the management platform in the Industrial Internet of Things includes: an obtaining module configured to generate a first layout directed graph; a material module configured to assign a material requirement to a corresponding material end point and assign a material supply to a corresponding material start point; a reconstruction module configured to reconstruct the first layout directed graph and form a third layout directed graph; a first calculation module configured to calculate a first path; a correction module configured to form an intermediate layout directed graph; and a second calculation module configured to calculate a second path.

Abstract: The present disclosure discloses an image encryption method based on multi-scale compressed sensing and a Markov model. According to the difference in information carried by low-frequency coefficients and high-frequency coefficients of an image, different sampling rates are set for the low-frequency coefficients and the high-frequency coefficients of the image, which can effectively improve the reconstruction quality of a decrypted image. The decrypted image obtained by the present disclosure has higher quality than the decrypted image generated by the existing scheme, and a better visual effect and more complete original image information can be obtained.

Abstract: A method for tidal lane opening management in a smart city is provided. The method applied to the management platform includes issuing a data obtaining instruction to a sensor network platform to obtain a first traffic feature of a target road within a first time period from an object platform, wherein the first traffic feature is a feature reflecting a flow situation of the target road, determining a target tidal lane opening scheme of the target road within the first time period based on the first traffic feature using a preset algorithm, generating a scheme execution instruction based on the target tidal lane opening program, sending the scheme execution instruction to the target object through, and issuing a data upload instruction to send the target tidal lane opening scheme to the user platform through a service platform.

Abstract: The present disclosure provides a display panel, a method for preparing the same, and a display device. The display panel includes pixel units distributed in an array in a display area, where the pixel units include sub-pixels, at least one of which has a maximum grayscale value voltage different from a maximum grayscale value voltage of the other sub-pixel; and a switching circuit including switching units on a side of the display area, where one end of the switching unit is connected to a data line. In two adjacent columns of pixel units, two sub-pixels having the same maximum grayscale value voltage are connected to two adjacent switching units through data lines, respectively.

Abstract: A semiconductor structure includes a substrate; a first dielectric layer on the substrate; an etch stop layer on the first dielectric layer; a second dielectric layer on the etch stop layer; a first conductor and a second conductor in the second dielectric layer, an air gap in the second dielectric layer and between the first conductor and the second conductor; and a low-polarity dielectric layer on a sidewall surface of the second dielectric layer within the air gap.

Abstract: This invention presents an electrochemical metallurgical technique for extracting metals and sulfur from metal sulfides, offering an adjustable composition and mechanical properties during electrode preparation. The metal sulfide anode, submerged in an electrolyte with a cathode made of materials like titanium, copper, stainless steel, lead, zinc, aluminum or graphite, undergoes electrolysis. This process oxidizes sulfur in the metal sulfide to the anode and releases metal ions into the electrolyte, where they're reduced at the cathode. The method yields metal at the cathode and sulfur at the anode, with minimal environmental impact, low investment, and straightforward process.