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237results about How to "Effective division" patented technology

High resolution encoding and transmission of traffic information

Systems and methods are provided for increasing the geospatial resolution of traffic information by dividing known location intervals into a fixed number of sub-segments not tied to any one map providers format, efficient coding of the traffic information, and distribution of the traffic information to end-user consuming devices over one or more of a satellite based broadcast transport medium and a data communications network. Exemplary embodiments of the present invention detail a nationwide traffic service which can be encoded and distributed through a single broadcast service, such as, for example, an SDARS service, or a broadcast over a data network. Exemplary embodiments include aggregating the traffic data from segments of multiple location intervals, into predefined and predetermined flow vectors, and sending the flow vectors within a data stream to users. Confidence levels obtained from raw traffic data can both (I) be disclosed to drivers/users to supplement a very low signal (or no signal) speed and congestion report, and (ii) can also be used in various system algorithms that decide what local anomalies or aberrations to filter out as noise, or to disclose as accurate information and thus more granularly depict the roadway in question (and use additional bits to do so) as an actual highly localized traffic condition.
Owner:SIRIUS XM RADIO INC

Indoor positioning method based on SVM and K mean value clustering algorithm

InactiveCN104853434AReduce fingerprint libraryThe mapping mode is simpleLocation information based serviceCluster algorithmSupport vector machine
The invention adopts a method based on a SVM (Support Vector Machine) and a K mean value clustering algorithm for realizing indoor positioning and aims to improve positioning precision and stability of indoor positioning and to reduce complexity of a positioning algorithm. The main positioning process includes a first step of selecting a plurality of reference points uniformly in a positioning area and collecting RSSI samples on the points, and forming fingerprints based on the RSSI samples and the position coordinates of the reference points, wherein the fingerprints form a fingerprint database; a second step of adopting a K mean value clustering algorithm for the fingerprint database and dividing the positioning area into a plurality of sub areas with smaller ranges automatically; a third step of adopting an SVM algorithm for the positioning sub areas and constructing positioning sub models for each sub area; a fourth step of calculating the mean value of RSSI in each sub area and determining the mean value as the clustering center of said sub area; a fifth step of calculating Eucidean distance between a real time RSSI signal and all the clustering centers of the sub areas, determining the nearest sub area and realizing precise positioning by utilizing the positioning model constructed in the third step.
Owner:SUN YAT SEN UNIV +3

Transient electromagnetic detection method for ground-roadway of multi-layer goaf

The invention discloses a transient electromagnetic detection method for ground-roadway of a multi-layer goaf. The transient electromagnetic detection method for the ground-roadway of the multi-layer goaf mainly includes data gathering and data processing. The concrete steps include that paving a large emitting coil on the ground to emit electromagnetic signals to the underground, distributing three-component receiving probes at upper and lower gate roadways, cutting holes, connection roadways and the like of the roadway of the underground working surface to gather data, and transmitting the data to a general console desk on the ground through an underground data gathering station and a data transmission system; processing the data, and obtaining the analysis result through the primary processing and apparent resistivity conversion for the data, image display of the data and data comparison. The transient electromagnetic detection method for the ground-roadway of the multi-layer goaf is capable of identifying the water layer position of the multi-layer goaf of the whole mine lot without blind area in a high resolution, realizing dynamic monitoring and effectively dividing the boundaries of each goaf in the mine lot in the vertical direction and horizontal direction to provide guarantee for the safety production of coal; the transient electromagnetic detection method for the ground-roadway of the multi-layer goaf greatly improves the resolution capability of the multi-layer goaf of the mine and realizes careful exploration.
Owner:CHINA UNIV OF MINING & TECH

Method for effectively segmenting hyperspectral oil-spill image

Provided is a method for effectively segmenting a hyperspectral oil-spill image. The method comprises steps of: defining an initial level set function and other related functions; acquiring a new fitting item in combination with a Fisher criterion; constructing an edge stop function to obtain a new length item; performing improvement in combination with an end member extraction algorithm; introducing a level set regular item to prevent reinitialization of the level set function; minimizing an energy function to obtain an Euler-Lagrange equation; setting parameters; selecting a display band and an initial contour; displaying a segmentation result graph; calculating various segmentation precision evaluation indexes; comparing and evaluating the accuracy of the segmentation results. The method can classify a target area in a simulated hyperspectral image and a real hyperspectral image, and effectively segments the hyperspectral oil-spill image with boundary blur and noise, improves the segmentation accuracy of the hyperspectral image, obtain a more accurate classification effect, makes the parameter change more stable, makes the contour curve more accurate, obtains the continuous and closed boundary contour, and has higher precision of segmentation.
Owner:DALIAN MARITIME UNIVERSITY
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