2 results about "Grey systems theory" patented technology

The present application relates to the technical field of deformation monitoring, in particular to a time-space self-learning early warning system for foundation settlement risk in highway construction process, which comprises an information processing module, a weight construction module, a tensor analysis module, a risk calculation module and an early warning release module. In the present application, the spatial position vector and the Gaussian kernel function are used to evaluate the distribution density and generate the coverage weight, which eliminates the local deviation caused by uneven distribution and ensures the balanced expression of regional settlement characteristics. The lag interval is deduced by using the soil consolidation theory and the deformation direction consistency is screened, the environmental noise is eliminated to lock the effective cumulative settlement caused by specific process, the prediction model with self-adaptive ability is constructed by combining the grey system theory, the dynamic growth rate of the settlement cumulative value is tracked in real time, the change from static control to dynamic trend warning is realized, and the sensitivity of capturing the precursor of foundation instability is improved, which provides a scientific basis for construction process adjustment.

The application discloses a shale gas drilling speed increasing method and system for rock drillability prediction, and the method comprises the following steps: collecting geological and rock mechanics parameters of a target stratum, establishing a rock drillability quantitative evaluation model based on a grey system theory analysis method; based on the rock drillability quantitative evaluation model and a PDC drill bit cutting tooth force balance equation, a mechanical interaction model of a PDC drill bit cutting tooth with rock containing a chamfer is established, and the mechanical interaction model is corrected through finite element analysis combined with experimental data; a rotating impact experiment is conducted based on a homogeneous isotropic rock sample, basic mechanical parameters of the rock are recorded, and the influence of different impact parameters on the rock breaking process is tested; and based on the corrected mechanical interaction model and the rotating impact experimental data, the best impact load and impact frequency range are determined to improve the shale gas drilling speed. The application can effectively reduce the unit rock breaking specific work and improve the shale gas drilling efficiency, and has wide engineering applicability.