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The wisdom tourism is the important development direction of tourism which will realize the refinement and personalized of tourism. The wisdom tourism needs support of the data flow processing platform and framework because tourism data is dynamic, large number and multi-dimensions. This paper describes a two-stage modular data flow processing framework based on data view and data service. Taking...
For the problem of underwater targets bearing estimation, the performance of linear sonar array is researched. To get big sonar array aperture and then to achieve high angular resolution with few sensor elements, sparse random array is introduced. To address the coherent problem of incident signals that radiate from targets, the CS (compressive sensing) based method is proposed to estimate the bearing...
In most of available DOA estimation algorithms, such as MUSIC, Capon algorithm, and so on, the Nyquist spatial sampling theory must be followed. Otherwise, ambiguous azimuth angles will appear in DOA estimation results, which lead to inconvenience on the judgment of target azimuth angle. To improve the sonar's resolution, a general method is to increase the sensor elements then expand its observation...
For ship navigation system, the statistics of measurement noise will change with the actual working environment. If the traditional Kalman Filter is applied to integrated navigation system, the optimum state estimation may not be obtained even the filter becomes divergent due to the interference in environment. Based on fuzzy inference system (FIS), a new Kalman Filter was proposed in this paper....
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