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An ultrasonic water meter metering abnormity self-checking method based on sound velocity dynamic correction relates to the technical field of data identification, and comprises the following steps: in a metering period, controlling an ultrasonic transducer to alternately transmit and receive first frequency ultrasonic waves and second frequency ultrasonic waves; according to the flight time data, calculating a first flow velocity, a first sound velocity, a second flow velocity and a second sound velocity; calculating a flow velocity difference value between the first flow velocity and the second flow velocity, and calculating a sound velocity difference value between the first sound velocity and the second sound velocity; when the flow velocity difference value exceeds a preset flow velocity difference value threshold value or the sound velocity difference value exceeds a preset sound velocity difference value threshold value, abnormal state information of abnormal metering in the current metering period is generated; and determining a compensation flow velocity as an effective flow velocity of the current metering period according to a preset compensation strategy. By implementing the application, the metering accuracy of the ultrasonic water meter in a long-term operation state can be improved.

This invention discloses a method and system for constructing dynamic data across the entire supply chain in the securities business field. The method includes screening key information of the tested system, finding correlations, building and executing a visualized full-chain data construction model, and switching dynamic parameters-driven modes. After data security processing and a data sharing platform, the final result is a data construction method and system coupled with business operations. In the data simulation application of securities business-related systems, dynamic data construction is achieved by calling individual atoms or full-chain scenario integration functions in the model. The construction results are then used in real time to serve upstream and downstream full-chain system applications. This invention exhibits outstanding performance in terms of efficiency, accuracy, flexibility, and reusability, and has been widely applied in multiple fields.