The sea surface merged charts of thermal structures in the form of dominant orientations of thermal contrasts (DOTCs) provide an information about surface circulation regularly. High correlation between DOTCs and flow...
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The sea surface merged charts of thermal structures in the form of dominant orientations of thermal contrasts (DOTCs) provide an information about surface circulation regularly. High correlation between DOTCs and flow directions makes it possible to use them for water eddy identification. A new method for automatic identification of eddies as arbitrary closed circulations is proposed. The method consists of three procedures: identification of an eddy and its center, computation of size and shape;construction of an eddy contour by minimization of DOTC "leaking" out of the contour;the analysis of constructed contours and screening off false detected objects. The main problem of the automatic eddy detection which is the possibility for generation of the false detected objects is considered. The screening algorithms are proposed, their effectiveness is demonstrated and the opportunities of automatic eddy tracing on a temporary chart sequence are estimated. The method has been tested on three month sequence of DOTC charts of Okhotsk sea region under heavy cloudy conditions.
New results for problem of matrices spectra computation and a methodology for study of observability, controllability and stability of dynamical systems under conditions of finite precision calculations are presented.
New results for problem of matrices spectra computation and a methodology for study of observability, controllability and stability of dynamical systems under conditions of finite precision calculations are presented.
A method for automatic monitoring of tropical cyclones (TC) has been developed. The method is based on a structure analysis of TC cloudiness on satellite imagery. It consists of three procedures: detection of cloudy c...
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A method for automatic monitoring of tropical cyclones (TC) has been developed. The method is based on a structure analysis of TC cloudiness on satellite imagery. It consists of three procedures: detection of cloudy cluster, computation of TC eye size and location, estimation of TC center and geometry of cloudy swirling. The main procedure of TC center estimation uses cloudy structure charts in a form of dominant orientation of thermal contrasts (DOTC). The DOTCs can be used as estimations of wind velocity directions. The procedure computes the TC center on the base of a model of circular movement. The method approbation on satellite images of Far-Eastern region for three year summer seasons has demonstrated high reliability (the centers have been computed almost always) and good correspondence with the results of Japan Meteorological Agency and Joint Typhoon Warning Center (USA). The TC tracks are used for automatic computation of typhoon warm core, humidity parameters and near surface wind velocity on the base of atmosphere profiles of temperature and humidity retrieved from ATOVS/NOAA radiometer measurements.
The paper describes a computer knowledge bank on medical diagnostics in the field of ophthalmology. The knowledge bank is developed as a web-based set of applications and can be used within the framework of cloud comp...
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The paper describes a computer knowledge bank on medical diagnostics in the field of ophthalmology. The knowledge bank is developed as a web-based set of applications and can be used within the framework of cloud computing technology.
Multitemporal and multisatellite studies or comparisons between satellite data and local ground measurements require nowadays automatic navigation of one pixel accuracy for meteorological satellite images. The problem...
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Multitemporal and multisatellite studies or comparisons between satellite data and local ground measurements require nowadays automatic navigation of one pixel accuracy for meteorological satellite images. The problems of precise automatic navigation of satellite imagery are considered and an approach based on automatic calculation of ground control points (GCPs) and navigation attitude forecasting is developed. An automatic navigation method of one pixel accuracy is presented. It is suitable for "full" images received during one session from meteorological satellites. The GCP automatic calculation procedure is based on verification of sea-land separability hypothesis. The verification criteria used can increase significantly the reliability of GCP calculation under heavy weather conditions of the Earth observation. The method is based on a correction procedure of satellite attitude angles (roll, pitch, and yaw). A possibility to forecast the navigation attitude parameters in the form of common translation of them earlier navigated images is considered and the results are discussed. The results of approbation of new navigation method for a yearly image set of satellites images (series POES NOAA, MTSAT-1R and FengYun-2C) received in the Multiple Access Centre for Regional Satellite Monitoring of Environment (Far-Eastern Branch of Russian Academy of Sciences) are presented.
The paper discusses tomography reconstruction of distributed physical fields by means of fiber optical measuring systems (FOMN) [1] for parallel setup of measuring lines with a small number of scanning directions. The...
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A parallel computational algorithm for researching of two-dimensional (plane and axially symmetric) unsteady gas flows through a porous media of complex shape with energy sources has been developed. It has been shown ...
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A parallel computational algorithm for researching of two-dimensional (plane and axially symmetric) unsteady gas flows through a porous media of complex shape with energy sources has been developed. It has been shown that object-oriented approach made it possible to develop a distributed computational algorithm and to automate definition assignment of the object geometry without essential changes of code. Calculations have been carried out on the multiprocessor computer MPC-15K. The parallel algorithm efficiency has been analyzed.
This work is dedicated to development of integration method of Matlab and external program for visualization of multilink manipulator movement in order to create the simulating complex for investigation of their contr...
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This work is dedicated to development of integration method of Matlab and external program for visualization of multilink manipulator movement in order to create the simulating complex for investigation of their control systems. It is offered to use the UDP protocol for data transmitting between Matlab and external program. But in this case we must solve the synchronization task for calculation processes of Matlab and external program. In this paper the algorithm of automatic synchronization of above-noted processes is offered. This algorithm is based on using of methods of automatic control theory. Carried out calculation experiments completely confirm the workability and efficiency of offered approach.
In this work the method of advanced forming of program signal of UV's movement on desired spatial trajectory is offered. This method is based on simultaneous tuning of desirable UV's velocity and correction of...
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Complexity of a task of sea ecological assessment, and first of all identification and monitoring of harmful algal bloom, compels to integrate facilities and activities of three research institutes of Far-Eastern Bran...
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Complexity of a task of sea ecological assessment, and first of all identification and monitoring of harmful algal bloom, compels to integrate facilities and activities of three research institutes of Far-Eastern Branch of Russian Academy of Sciences (institute for automation and controlprocesses, institute of Marine Biology , Pacific Oceanological institute). Equipment of three centers (Satellite Center, Center of Lidar Methods for Substance Research, Center for Harmful Algal Bloom and Bio-toxicity Monitoring) was used for this purpose. Originated capabilities allowed to organize comprehensive field and laboratory investigations for solution of this task. Description of methods used and preliminary results are presented.
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