5results about How to "Contributes to accuracy" patented technology

This invention discloses a method for predicting urban rail transit passenger flow based on multimodal information fusion. First, feature vectors of urban points of interest are obtained. Then, a directed graph of rail transit stations and the positional relationship between rail transit stations and points of interest are constructed to extract feature vectors of rail transit stations. Social media text from various time periods is crawled to extract public travel interest feature vectors. Then, a multi-head cross-attention model is used to fuse the public travel interest feature vectors, rail transit station feature vectors, and historical passenger flow feature vectors. Finally, an LTSM network is used to predict the passenger flow feature vector for the next time period. This invention integrates urban point of interest features and social media text features to predict urban rail transit passenger flow, improving prediction accuracy.

This application relates to a method, system, and storage medium for extracting structured data from literature. The method includes: acquiring information about the literature to be processed and information about the domain of interest; generating intent recognition routing results by calling a corresponding domain intent recognition model based on the information about the domain of interest; constructing prompt words based on the information about the domain of interest and the intent recognition routing results, and extracting first target literature information from the information about the literature to be processed; constructing a corresponding domain similarity function based on the intent recognition routing results, and generating second target literature information by removing similar literature from the first target literature information; and outputting experimental information, experimental knowledge graphs, and source relationships in a structured form based on the second target literature information. This application determines the intent recognition routing results through domain intent recognition, adaptively selects the extraction strategy and domain similarity function, and combines multimodal parsing and block processing to achieve high-completeness extraction, cross-domain adaptive fusion, and traceable structured output of experimental information from cross-domain literature.

The invention relates to the technical field of air traffic management, in particular to a knowledge ontology-driven navigation information structured information extraction method, which comprises the following steps of: determining a classification basis table of a navigation information data set; preprocessing the navigation information of which the information is to be extracted to obtain a plurality of rule structure items and a navigation announcement text; establishing cue words based on the event attribute sequence of the navigation announcement text and the navigation information; inputting the cue word into the large language model; the event state transition model determines a current state according to a historical state, and the method comprises the following steps: when the current state is a value generation state, a state decision maker determines whether a next state is a value generation state or an end value state; and finally obtaining a plurality of event types and attributes. And taking the plurality of event ontologies and the plurality of rule structure items as the extracted structured information together. According to the structured information extraction method and device, the structured information extraction accuracy can be improved.

This application relates to the field of fault prediction technology, specifically to a method and system for monitoring and early warning of fault risks in nuclear power plant equipment. Specifically, it includes: constructing a first fluctuation feature value based on the randomness of the peak occurrence time and the fluctuation characteristics of the signal sharpness in the vibration signal of a planetary gearbox bearing in a nuclear power plant; constructing a second fluctuation feature value by analyzing the distribution of sideband features in the envelope spectrum of the bearing vibration signal in each sampling period and comparing it with the center frequency of the previous sampling period; appropriately adjusting the filter length based on both factors, and combining this with a filtering algorithm to extract fault feature signals from the bearing vibration signal in each sampling period, thereby performing fault detection of the planetary gearbox within each sampling period. This solves the problem of inappropriate filter length values ​​when filtering the bearing vibration signal of a nuclear power plant planetary gearbox, improves the extraction accuracy of fault feature signals, and contributes to the accuracy of subsequent fault detection.

The invention discloses an agitating lorry with a concrete slump detection device, and relates to the technical field of concrete detection, the agitating lorry comprises a cylinder, the whole body is of a split structure, the cylinder comprises a plurality of same sub-cylinder parts which are distributed in a surrounding manner, and every two adjacent sub-cylinder parts are in sealed connection through a connecting part; an elastic interlayer covers the inner wall of each sub-cylinder part, a closed cavity is formed between the elastic interlayer and the inner wall of the corresponding sub-cylinder part, gas is injected into or discharged from the closed cavity, and the elastic interlayer can expand and protrude out of the plane of the inner wall of the sub-cylinder part or contract and cling to the inner wall of the sub-cylinder part; the bottom end of each sub-cylinder part can swing outwards relative to the top of the sub-cylinder part so that the cylinder body can be diverged and expanded from the bottom, and locking assemblies in one-to-one correspondence with the sub-cylinder parts are arranged on the periphery of the bottom of the cylinder body and used for limiting the swing action of the sub-cylinder parts. The concrete slump test device has the effect of improving the accuracy of the concrete slump test result.