54 results about "Spatial methods" patented technology

Provided are a method which permits complete training data and data with added errors, and enables the early and accurate discovery of errors in facilities such as a plant, and a system thereof. To achieve the objectives, (1) the behavior of temporal data is observed over time, and the trace is divided into clusters; (2) the divided cluster groups are modeled in sub spaces, and the discrepancy values are calculated as errors candidates; (3) the training data are used (compare, reference, etc.) for reference to determine the state transitions caused by the changes over time, the environmental changes, the maintenance (parts replacement), and the operation states; and (4) the modeling is a sub space method such as regression analysis or projection distance method of every N data removing N data items, (N=0, 1, 2, . . . ) (for example, when N=1, one error data item is considered to have been added, this data is removed, then the modeling is performed), or a local sub space method. Linear fitting in regression analysis is equivalent to the lowest order regression analysis.

A system and method for opportunistically designing collaborative beamforming vectors is disclosed for a wireless multiple input, multiple output (MIMO) space division multiple access (SDMA) communication system by sequentially designing beamforming vectors for ranked channels in order to exploit the instantaneous channel conditions to improve per user average SNR performance. Each subscriber station independently transmits information to a base station that allows the base station to determine beamforming vectors for each subscriber station by ranking the subscriber stations by channel strength. Using sequential nullspace methods, the ranked channel matrices are then used to select the channel matrix Hi for the best subscriber station, to design the wi, vi for the best subscriber station as the left and right singular vectors of the MIMO channel matrix Hi, to transform the remaining channels and to continue the process until beamforming vectors are designed for all channels.

The present invention provides various methods of generating and using models of biological events. The models can be used to classify individuals according to the biological event.

An audio signal is processed to determine primary and ambient components by transforming the signal into frequency-domain vectors, and decomposing the left and right channel vectors into ambient and primary components by orthogonal projection.

The invention discloses a flexibly connected double unmanned ship autonomous collaboration method for rounding up oil spillage. The method comprises the steps of (1) planning a sailing trajectory capable of meeting multiple constraint conditions according to the oil spillage position, the initial positions of unmanned ships and dynamic characteristics of the flexibly connected unmanned ships; (2) performing trajectory tracking on the acquired sailing trajectory; (3) correcting the expected heading and speed of each unmanned ship in real time according to influences of a flexible connection acting force and force moment by adopting a fuzzy null space based behavior fusion method in order to ensure the unmanned ships to fulfill the task and reduce adverse influences of the flexible connection acting force and force moment in the process of performing trajectory tracking; and (4) calculating a control instruction by a motion controller of the unmanned ships so as to drive the actual heading and speed of the unmanned ships to reach the expected values. According to the invention, adverse influences generated by the flexible connection acting force and force moment are effectively eliminated by using the fuzzy null space method, and autonomous collaboration control for the flexibly connected double unmanned ship is realized.

A navigational aid for use as an AIS apparatus includes a memory for storing information about previous use of individual time slots synchronized with transmission schedules of other stations and a signal detector for judging whether an information signal exists in a time slot specified in accordance with a synchronization timing signal based on the information stored in the memory and a result of monitoring of the behavior of a baseband signal obtained from a received signal on an IQ-plane. The navigational aid transmits information about own station based on a result of judgment by the signal detector. The monitoring of the behavior of the received baseband signal plotted on the IQ-plane can be accomplished by performing pattern recognition operation, for which a carrier sense technique, such as a support vector machine, subspace method or neural network, can be used.

An extended subspace method for inverting geophysical data to infer models for two or more subsurface physical properties, using gradients of an objective function as basis vectors for forming model updates. The extended set of basis vectors provides explicit mixing between gradient components corresponding to different medium parameters, for example P-wave velocity and an anisotropy parameter. In a preferred embodiment, off-diagonal elements of the mixing matrix may be scaled to adjust the degree of mixing between gradient components. Coefficients of the basis vector expansion are determined in a way that explicitly accounts for leakage or crosstalk between different physical parameters. The same extended subspace approach may be used to make further improvement to the model updates by incorporating well constraints, where well log data are available.