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1913results about How to "Accurate description" patented technology

System and method capable of navigating and/or mapping any multi-dimensional space

A method and system that allows a user to perform automatic study, layout and verification of a multidimensional space in real time where the study can be displayed graphically, in 3-dimensions for example, via a handheld unit allowing the system to guide and / or navigate the user throughout the multidimensional space as the automatic study and / or layout is being performed.
Owner:STATHIS SAM

Generalized well management in parallel reservoir simulation

A computer-implemented process simulates production of oil and gas from hydrocarbon reservoirs. The process is used to help forecast the optimal future oil and gas recovery from large hydrocarbon reservoirs. At the same, this process is flexible to allow for further addition of new options; robust and reliable; and easy to use. The process is also comprehensive in that it allows a forecast of future performance of a wide range of reservoirs and future operation scenarios. By using the high-resolution models provided, a reservoir can be described much more accurately.
Owner:SAUDI ARABIAN OIL CO

Image appearance based loop closure detecting method in monocular vision SLAM (simultaneous localization and mapping)

The invention discloses an image appearance based loop closure detecting method in monocular vision SLAM (simultaneous localization and mapping). The image appearance based loop closure detecting method includes acquiring images of the current scene by a monocular camera carried by a mobile robot during advancing, and extracting characteristics of bag of visual words of the images of the current scene; preprocessing the images by details of measuring similarities of the images according to inner products of image weight vectors and rejecting the current image highly similar to a previous history image; updating posterior probability in a loop closure hypothetical state by a Bayesian filter process to carry out loop closure detection so as to judge whether the current image is subjected to loop closure or not; and verifying loop closure detection results obtained in the previous step by an image reverse retrieval process. Further, in a process of establishing a visual dictionary, the quantity of clustering categories is regulated dynamically according to TSC (tightness and separation criterion) values which serve as an evaluation criterion for clustering results. Compared with the prior art, the loop closure detecting method has the advantages of high instantaneity and detection precision.
Owner:NANJING UNIV OF POSTS & TELECOMM
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