2 results about "Minimum description length" patented technology

This invention provides a method for early warning of borehole wall collapse risk in impact-drilled pile foundations, belonging to the field of construction risk early warning technology. This invention collects multi-source signals by deploying an ultrasonic transducer array and a mechanical vibration acceleration sensor array at multiple depth nodes within the borehole. It extracts borehole wall collapse characteristic components from strong vibration interference using empirical mode decomposition and independent component analysis. Simultaneously, it inputs the multi-dimensional time-series data of the entire borehole into a minimum description length change point detection algorithm to detect abrupt changes in borehole wall state and outputs a hazard level score. Sensor data from each depth node is input into a physically embedded spatiotemporal graph attention model to output the collapse risk probability and estimated collapse depth location. Furthermore, an adaptive learning rate adjustment function driven by a stratum change intensity index dynamically adjusts the online update learning rate of the artificial intelligence model. Finally, it integrates multi-level early warning signals to output a final early warning conclusion, solving the technical problem of the inability to provide real-time and accurate early warning of borehole wall collapse risk during impact-drilled pile construction.

The application discloses a network representation method and system based on a multi-dimensional heterogeneous resource abstract view, and belongs to the technical field of communication networks, and comprises the following steps: acquiring information of network topology, equipment and link state, constructing a global original view, and initializing each node and link as a supernode and a superedge respectively to form an initial abstract view; generating a candidate supernode pair, calculating a comprehensive income of merging which takes into account storage compression income and path quality distortion, and iteratively performing supernode merging under the attribute purity constraint condition until the size of the abstract view meets a preset target; in the merging process, multi-dimensional attributes of the superedge are aggregated and updated, and only the superedge which reduces the overall storage overhead is reserved based on the minimum description length principle. While reducing the size of the network state, the application can maintain effective representation of multi-dimensional resource characteristics, has good dynamic adaptation capability, and is suitable for efficient modeling and analysis in a large-scale complex network environment.