Abstract: The present disclosure belongs to field of nondestructive testing and positioning of urban water supply pipe leakage in municipal engineering and discloses a method for detecting leakage of water supply pipe based on ground-penetrating radar three-dimensional image attribute analysis including: acquiring ground-penetrating radar original image data of water supply pipe by longitudinal scanning; de-noising and filtering acquired original image data; fitting processed image data into three-dimensional data body by interpolation, extracting multiple planar or stereo image attributes and displaying image attributes by longitudinal, transverse, horizontal, irregular profiles and iso-surface; and accurately identifying and positioning pipe leakage positions and scale by multi-attribute comprehensive analysis.

Abstract: The disclosure relates to the technical field of battery charging and swapping, and in particular, to a control method and system for a battery charging and swap station, a medium, an apparatus, and a battery charging and swap station. The disclosure is intended to solve the problem that a battery charging and swap station is prone to false alarm and halt at a low temperature. To this purpose, the battery charging and swap station in the disclosure includes a battery swap apparatus. The battery swap apparatus includes a locking/unlocking mechanism. The locking/unlocking mechanism is configured to be capable of locking and unlocking a battery locking mechanism through rotation of a locking/unlocking head of the locking/unlocking mechanism.

Abstract: The disclosure relates to the technical field of battery swapping, and in particular to a battery swap control method and system, a medium, an apparatus, and a battery charging and swap station. An objective of the disclosure is to solve a problem that battery swap time is forced to be prolonged due to a fault in a locking process.

Abstract: The disclosure relates to the technical field of safety protection, and in particular, to a safety protection method and system for a battery charging and swap station, a medium, an apparatus, and the battery charging and swap station. The disclosure aims to solve the problem of small coverage of an existing safety protection method. For this purpose, the battery charging and swap station in the disclosure includes a battery swap platform, a battery swap apparatus, position detection devices, and safety scanning devices. The battery swap platform can bear a vehicle with a battery to be swapped. The position detection devices can send an electrical signal when blocked. The safety scanning devices can monitor one of a plurality of preset monitoring regions each time.

Abstract: The disclosure relates to the field of battery charging and swapping technologies, and specifically, to a wheel positioning method and system, a medium, an apparatus, and a battery charging and swapping station. The disclosure aims to resolve the problem of poor applicability of an existing four-wheel positioning method for a battery charging and swapping station.

Abstract: A sewage pipe network real-time simulation method based on water supply Internet of Things data drive. The method involves an offline module and a real-time online module, wherein the offline module integrates a sewage pipe network model and a water supply pipe network hydraulic model, corrects historical water consumption of each node of the water supply pipe network hydraulic model, establishes a correction single-objective optimization model of the sewage pipe network model, and determines a transfer coefficient between the water consumption of each node and an inflow of an inspection well; and the real-time online module realizes the real-time simulation of hydraulic parameters of the sewage pipe network model. The method fills a vacancy in the field of sewage pipe network real-time simulation, and important technical support is provided for the management of sewage pipe network systems, and the method has good value in promotion and practical engineering application.

Abstract: The present disclosure provides a method based on consistency of a distribution feature of checking-validation data for establishing a hydrological model. The method includes: S1: proposing an idea of discrete checking of data for a hydrological process model according to S11-S12; S2: using an MDUPLEX method to allocate an original runoff data set D to a checking set C and a validation set E according to S21-S28; and S3: checking and validating the model according to S31-S32, determining a model parameter, and establishing the hydrological process model. The present disclosure guarantees consistency of performance of the hydrological process model during checking and validation periods by means of discrete sampling, so as to improve effectiveness of the hydrological process model and stability of engineering application.

Abstract: The present disclosure belongs to field of nondestructive testing and positioning of urban water supply pipe leakage in municipal engineering and discloses a method for detecting leakage of water supply pipe based on ground-penetrating radar three-dimensional image attribute analysis including: acquiring ground-penetrating radar original image data of water supply pipe by longitudinal scanning; de-noising and filtering acquired original image data; fitting processed image data into three-dimensional data body by interpolation, extracting multiple planar or stereo image attributes and displaying image attributes by longitudinal, transverse, horizontal, irregular profiles and iso-surface; and accurately identifying and positioning pipe leakage positions and scale by multi-attribute comprehensive analysis.

Abstract: The present invention discloses a node flow optimization distribution method for improving the accuracy of transient hydraulic simulation of a water supply in-series pipeline. The present invention optimizes the flow distribution coefficients of intermediate nodes to minimize the impact thereof on the calculation and analysis of transient flow. Further, the simplified error generated by the node flow distribution can be quantified and evaluated by the control threshold of the simplified errors to achieve effective control of the simplified process. In addition, the simplified operation of the method of the present invention is carried out sequentially from the intermediate node with the smallest simplified error, which effectively overcomes the potential defect of the conventional node flow distribution that leads to a significant reduction in the accuracy of the model, and can ensure the reliability and accuracy of the simplified operation of the same-diameter in-series pipeline.

Abstract: The present disclosure belongs to the field of municipal engineering and urban water supply network, and provides an efficient method for localizing leaks in a districted metering area (DMA) of water supply pipe networks based on valve operations and online water metering, which is implemented in multiple stages to gradually reduce the leaking area. At each stage, the DMA is firstly decomposed into two sub-areas using an optimized valve operation strategy determined by a minimized objective function, wherein a graph theory-based method is used for the solution. Then the sub-areas containing leaks are identified through online water balance analysis based on smart demand meters, thereby reducing the leaking area. The minimum leaking area is identified with the least number of valve operations. Compared with the traditional methods, the method of the present disclosure can obviously improve the efficiency and accuracy of leak localization and is easy to implement.

Abstract: The present disclosure belongs to the field of municipal engineering and urban water supply network, and provides an efficient method for localizing leaks in a districted metering area (DMA) of water supply pipe networks based on valve operations and online water metering, which is implemented in multiple stages to gradually reduce the leaking area. At each stage, the DMA is firstly decomposed into two sub-areas using an optimized valve operation strategy determined by a minimized objective function, wherein a graph theory-based method is used for the solution. Then the sub-areas containing leaks are identified through online water balance analysis based on smart demand meters, thereby reducing the leaking area. The minimum leaking area is identified with the least number of valve operations. Compared with the traditional methods, the method of the present disclosure can obviously improve the efficiency and accuracy of leak localization and is easy to implement.

Abstract: The present invention discloses a node flow optimization distribution method for improving the accuracy of transient hydraulic simulation of a water supply in-series pipeline. The present invention optimizes the flow distribution coefficients of intermediate nodes to minimize the impact thereof on the calculation and analysis of transient flow. Further, the simplified error generated by the node flow distribution can be quantified and evaluated by the control threshold of the simplified errors to achieve effective control of the simplified process. In addition, the simplified operation of the method of the present invention is carried out sequentially from the intermediate node with the smallest simplified error, which effectively overcomes the potential defect of the conventional node flow distribution that leads to a significant reduction in the accuracy of the model, and can ensure the reliability and accuracy of the simplified operation of the same-diameter in-series pipeline.