Constructing radial kernels with higher-order generalized Strang-Fix conditions
Constructing radial kernels with higher-order generalized Strang-Fix conditions
复制标题
使用高阶广义 Strang-Fix 条件构造径向核
DOI:
10.1007/s10444-017-9528-x
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发表时间:
2017-12
影响因子:
1.7
通讯作者:
Wu Zongmin
中科院分区:
文献类型:
--
作者:
Gao Wenwu;Wu Zongmin
The paper provides an approach for constructing multivariate radial kernels satisfying higher-order generalized Strang-Fix conditions from a given univariate generator. There are three key features of the approach. First, the kernels are explicitly expressed only by the derivatives of thef-form of the generator without computing any Fourier transforms. Second, it includes the radial kernels with the highest-order generalized Strang-Fix conditions. Finally, it requires only computing univariate derivatives of thef-form. Therefore, the approach is simple, efficient and easy to implement. As examples, the paper constructs radial kernels from some commonly used generators, including the Gaussian functions, the inverse multiquadric functions and compactly supported positive definite functions.
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