3 results about "Sequential filter" patented technology

The invention provides an optical satellite all-time integrated navigation method and device based on sequential filtering, and relates to the technical field of navigation. The method comprises the following steps: determining an inertial navigation position matrix and an inertial navigation attitude matrix according to inertial navigation equipment arranged on a carrier; establishing an error model according to a preset error model determination mode, the inertial navigation position error, the inertial navigation attitude error, the inertial navigation position matrix and the inertial navigation attitude matrix; selecting a measurement model establishment mode according to the positioning time period attributes, and establishing a high-dimensional measurement model according to the measurement model establishment mode and the corresponding measurement parameters; according to a high-dimensional measurement model, a corresponding preset measurement noise covariance matrix, an inertial navigation position error in an inertial navigation position matrix, an inertial navigation attitude error in an inertial navigation attitude matrix, a preset state variable factor, a preset filtering updating parameter and a preset filtering updating mode, the inertial navigation position error in the inertial navigation attitude matrix is calculated. Iterative updating of sequential filtering measurement is performed to determine a target state variable.

A computer-implemented system and method for managing real estate transactions through an adaptive workflow engine that automatically configures transaction workflows based on user-specific parameters including geographic jurisdiction, financing type, and property characteristics. The system queries a compliance rules database storing jurisdiction-specific rule sets to generate transaction workflow data structures with appropriate workflow stages, task records, and document template identifiers. The adaptive workflow engine monitors transaction state data and automatically reconfigures workflow data structures in response to detected trigger events such as financing modifications, inspection results, or appraisal outcomes. A multi-stage matching engine connects users with verified service professionals through sequential filtering stages and weighted factor scoring based on geographic coverage, service type, availability, and reputation metrics. The system implements transaction state machines enforcing valid state transitions and maintains comprehensive audit histories throughout the transaction lifecycle.

The invention provides a cluster target staring detection method based on distance-Doppler two-dimensional sequential filtering, belongs to the technical field of radar detection, and is mainly used for solving the problem of detecting cross-distance-Doppler unit dense group targets by a staring radar. According to the method, firstly, cluster target distance migration is eliminated based on Keystone transformation, and then a potential distance unit of a cluster target is extracted through low-threshold coherent detection, so that the number of subsequent long-time accumulation processing times is reduced; secondly, positioning a highest-energy target on a potential distance unit of the group target with a high detection threshold by using a long-time coherent accumulation method jointly constrained by operation complexity and detection probability, and completing estimation of the distance, the speed and the acceleration of the target; further, a distance-Doppler two-dimensional combined wave gate is designed to eliminate the shielding effect of the target on space adjacent targets in the group; and finally, realizing detection and parameter estimation of all cluster individuals in a sequential filtering mode.