11 results about "Temporal search" patented technology

The invention discloses an intelligent security and protection management system and method based on abnormal target tracking, and relates to the field of security and protection management, which analyzes the space-time accessibility of a target in an environment topology after the target is lost, models the dynamic evolution process of target characteristics, and compares the judgment reference of identity re-identification from the static global appearance, so that the identification accuracy of the target is improved. And transferring to a dynamic probabilistic spatio-temporal search model with perspectiveness. And furthermore, based on the model, actively predicting a time-space window where a target may appear and an attenuated appearance portrait, performing targeted search and matching in a specified real-time video stream, and realizing reliable re-association of the identity according to the confidence of a matching result. Therefore, two key variables, namely environment topology and time decay, are introduced into a tracking mechanism, so that active prediction of the space-time position and the appearance state of the missing target can be realized, and the continuity and the accuracy of identity tracking can be guaranteed under the complex condition that the target is separated from the visual field for a long time.

This invention belongs to the field of data processing technology and provides a method and application for automatic time alignment of radar and image data based on target association. The method includes: creating a time search window on the time axis of the image data stream for each frame of radar data in the radar data stream; projecting each radar target in the radar dynamic target list onto the image coordinate system; for each frame of image within the time search window, counting the number of projection points falling into the image detection box to generate a target association score; selecting the radar frame and image frame with the highest target association score as a synchronization frame pair; calculating the timestamp offset based on the timestamp of the synchronization frame pair; and selecting a corresponding time alignment strategy to automatically align the radar data stream and image data stream based on the statistical stability of the calculated timestamp offsets. This invention can solve the problem of timestamp asynchrony between independently recorded millimeter-wave radar point cloud data and camera image data; and can achieve automatic offline time alignment.

The embodiment of the invention provides a visual media searching method and device, a storage medium and a program product. The method is suitable for the electronic equipment and comprises the steps that after a search operation on a search statement input to a search box is received, a first candidate set, a second candidate set and a third candidate set are determined, the search statement comprises a time entity and a first keyword, the time entity corresponds to a first time search range, and the first keyword corresponds to a second time search range; the first candidate set is a set matched with the first keyword, the second candidate set is a set matched with a first time search range, the third candidate set is a set matched with a second time search range, and the second time search range is obtained by expanding based on a time entity; when an intersection exists between the first candidate set and the second candidate set, displaying a search result set; and when the first candidate set and the second candidate set do not have the intersection, displaying the recommendation set. According to the technical scheme provided by the embodiment of the invention, the probability of hitting the search expectation of the user can be improved.

This application relates to an adaptive rapid positioning method and system based on GNSS synchronization status, belonging to the field of navigation and positioning technology. The method includes: entering the normal positioning process when all tracked satellite signals have completed message time synchronization; otherwise, entering the adaptive time-free positioning process, which includes first dynamically determining the minimum reliable time unit and time search interval based on the synchronization status level of the tracked satellite signals; then determining a relatively accurate local reference time as the local baseline time based on the synchronization status level and time search interval; and after correcting the signal transmission time of the tracked satellites based on the local baseline time and the minimum reliable time unit, performing rapid AGPS iterative calculation. This method enables rapid receiver positioning under a wide range of time errors.

This invention discloses a global path planning method for unmanned surface vessels (USVs) based on the dolphin swarm algorithm, comprising the following steps: Step 1: Modeling the USV path planning task environment using a grid method, designing the path length as the objective function for the global path, and calculating the shortest path; Step 2: Using the standard dolphin swarm algorithm to search for points within the path area to determine possible routes, and determining a suitable route based on all possible routes; Step 3: Setting a strategy for the standard dolphin swarm algorithm, setting a fixed search time to search for a suitable route, and adding a jump step after the search to jump to the optimal position within the suitable route; Step 4: Using a cubic B-spline curve fitting optimization method to smooth the feasible path, obtaining a smooth curve that conforms to the dynamic characteristics of the USV. This planning method has strong universality in both simple and complex environments.

The invention discloses a material price multi-source data structuring and space-time retrieval method and system, and relates to the technical field of material price data processing, and the method comprises the following steps: obtaining a multi-source price record of a target material, tracing an upstream generation dependency relationship, and identifying a price formation path type; on the basis of the path type and the dependency relationship, reversible conversion of each price record is judged, and a target comparison aperture price is generated; based on the target comparison aperture price, determining establishment time anchor points and space anchor points of each price record, and constructing price basic information; analyzing the retrieval target information, and determining a price comparability constraint rule; and based on the constraint rule, retrieving the price basic information, and outputting a comparable price result set. According to the method, target comparison aperture conversion is performed on the multi-source price records under different generation chains, so that the problem of comparable retrieval result distortion caused by difficulty in reliably converting the multi-source prices into the same comparison aperture in the prior art is solved.

The invention provides a diffusion model space-time mixing precision quantification method and system based on tree search, and the method comprises the steps: constructing a space search tree, and carrying out the aggregation of the space search tree, and obtaining the static weight precision and reference activation precision of a DiT model; discretizing the time dimension of the DiT model to generate a key time period; based on the reference activation precision, obtaining an average activation bit number and accumulated distortion of each key time period; constructing a time search tree, and aggregating the time search tree by using an average activation bit number and accumulated distortion to obtain an optimal scheduling path of the DiT model; and performing quantization processing on the pre-trained DiT model based on the static weight precision and the optimal scheduling path to obtain a quantized DiT model. The quantization DiT model can be applied to generation scenes of data such as images and videos, and distortion minimization of the data can be achieved under the condition of extremely low bit number budget through highly unified logic of spatial dimension and time.

The present disclosure relates to the technical field of password system security evaluation, and proposes an improved evaluation method and system of information set decoding algorithm, which first acquires SDP problem parameters and optimization parameters of the algorithm to be evaluated, estimates search space and expected iteration times by using combination number formula; calculates time overhead of Gaussian elimination of check matrix H in each round; evaluates complexity of search tree construction according to the number of layers and the size of the search tree; then estimates expected times of finding correct error vectors by constructing a matching probability model and taking its reciprocal; and finally obtains overall time complexity of the information set decoding algorithm in solving the SDP problem under the current parameter configuration by comprehensively processing complexity, Gaussian elimination time, search tree construction complexity and matching expected times. Through fine modeling and probability backstepping mechanism, more accurate complexity analysis means are provided, which can be widely applied to key links such as parameter selection, security level verification and standard formulation of post-quantum encryption algorithm.

A system is provided.SOLUTION: A system comprising: means for selecting an input method and a communication language of a user and inputting a symptom; translation means using generative artificial intelligence for translating the input of the user; means for analyzing the translated symptom; means for searching for an optimal medical institution based on a current position and a time zone; and means for arranging a pick-up in cooperation with a vehicle dispatch service.SELECTED DRAWING: Figure 1