4 results about "Equipotential surface" patented technology

The application provides a printing flat net multi-roll belt thickness difference detection system and relates to the technical field of thickness detection. The method comprises the following steps: a detection bridge construction module is used to construct a hollow cover type detection bridge which crosses the multi-roll parallel printing belt and forms a floating detection area with double curvature constraints in the belt splicing area; a solving module is used to solve a first virtual anchor point located on the geometric center line of the floating detection area and a second virtual anchor point located on the top symmetric axis of the hollow cover type detection bridge, so as to construct a U-shaped equidistant line cluster extending along the longitudinal direction of the floating detection area and an outer convex arc-shaped equipotential surface cluster extending along the transverse direction of the hollow cover type detection bridge. The application realizes global quantitative detection of the thickness difference of the multi-roll parallel printing belt, improves the accuracy, standardization and efficiency of the thickness detection, and solves the technical problem that the thickness difference of the multi-roll belt is difficult to accurately quantify.

The application discloses a kind of grid-connected virtual synchronous generator transient synchronization practical stability analysis method and system, belong to power grid technical field, method includes: establishing the grid-connected VSG disturbance system model of introducing lumped disturbance term, and the multiple uncertainty of parameter error, reference power fluctuation and grid operating condition change is uniformly represented in lumped disturbance term;Based on the boundary value of lumped disturbance term design deterministic comparison system, approximate representation disturbance system model;With comparison system as object, solve its unstable equilibrium point and deduce critical energy, make conservative estimate to the practical stability domain of disturbance system;Combined with Poincaré-Bendixson theorem determines the limit cycle position of comparison system and constructs equipotential surface, estimates the final boundary of the practical stability of disturbance system.The application also provides corresponding analysis system.The application improves the rigor and engineering practicability of stability analysis, and provides reliable basis for the safe and stable operation of grid-connected VSG.

The application provides a printing flat net multi-roll belt thickness difference detection system and relates to the technical field of thickness detection. The method comprises the following steps: a detection bridge construction module is used to construct a hollow cover type detection bridge which crosses the multi-roll parallel printing belt and forms a floating detection area with double curvature constraints in the belt splicing area; a solving module is used to solve a first virtual anchor point located on the geometric center line of the floating detection area and a second virtual anchor point located on the top symmetric axis of the hollow cover type detection bridge, so as to construct a U-shaped equidistant line cluster extending along the longitudinal direction of the floating detection area and an outer convex arc-shaped equipotential surface cluster extending along the transverse direction of the hollow cover type detection bridge. The application realizes global quantitative detection of the thickness difference of the multi-roll parallel printing belt, improves the accuracy, standardization and efficiency of the thickness detection, and solves the technical problem that the thickness difference of the multi-roll belt is difficult to accurately quantify.

This invention relates to the fields of computer vision and artificial intelligence, and discloses a sign language recognition method based on multi-level state feature optimization. The method includes acquiring a sign language video sequence and extracting original visual features; constructing a semantic potential energy field, calculating the potential energy value of the current frame features and their gradient vector relative to the feature space; constructing a local orthogonal basis based on the gradient vector, and orthogonally decoupling the features into normal transition components along the gradient direction and tangential steady-state components along the equipotential surface direction; performing differential evolution processing on the normal transition components based on multi-level dynamic states, using graph networks to repair transition features, and smoothing the tangential steady-state components; finally, reconstructing features and temporally decoding the processed components to obtain the sign language text. This invention utilizes the geometric properties of the potential energy field to achieve physical-level decoupling between core semantics and transitional actions, effectively solving the feature drift problem caused by action switching in continuous sign language, and significantly improving recognition accuracy.