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ALTERNATING BAND CRANK-NICOLSON METHOD FOR
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作者 陈劲 张宝琳 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1993年第2期150-162,共13页
The Alternating Segment Crank-Nicolson scheme for one-dimensional diffusion equation has been developed in [ 1 ], and the Alternating Block Crank-Nicolson method for two-dimensional problem in [2]. The methods have th... The Alternating Segment Crank-Nicolson scheme for one-dimensional diffusion equation has been developed in [ 1 ], and the Alternating Block Crank-Nicolson method for two-dimensional problem in [2]. The methods have the advantages of parallel computing, stability and good accuracy. Tn this paper for the two-dimensional diffusion equation, the net region is divided into bands, a special kind of block. This method is called the alternating Band Crank-Nicolson method. 展开更多
关键词 Two-Dimensional Diffusion Equation Finite difference Equation. Alternating band Crank-Nicolson Method.
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Performance analysis of source ranging by use of virtual receiver technique under different frequency bands 被引量:1
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作者 YAO Meijuan MA Li +1 位作者 LU Licheng GUO Shengming 《Chinese Journal of Acoustics》 CSCD 2015年第4期387-400,共14页
The traditional matched field processing localization need complicated computation to get the replica field and has high dependence on environment parameters and acoustic field model. To overcome the shortcoming, virt... The traditional matched field processing localization need complicated computation to get the replica field and has high dependence on environment parameters and acoustic field model. To overcome the shortcoming, virtual receiver technique is used for source ranging. A virtual receiver is constructed by correlating the two signals of the guide source and the objective source received by a vertical line array. Then, the slope of the interference striation of the virtual field is estimated using relevant signal processing method. Combining with the waveguide invariant/3, the range of the objective source is determined. Through the numerical simulations and data processing collected from the experiment carried out in the South China Sea in 2004, the virtual receiver technique for broadband source ranging under the slope- bottom shallow water environment is discussed. As the frequency increases, the frequency bands should be broadened to obtain complete interference striation for good ranging results. In data processing, the receiving array spacing is too large to promise the orthogonality of the modes as the frequency increases and ranging results become worse. 展开更多
关键词 Performance analysis of source ranging by use of virtual receiver technique under different frequency bands
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