| Hartley变换在海洋工程中的应用研究 |
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| 引用本文： | 孙鹤泉,沈永明,王永学.Hartley变换在海洋工程中的应用研究[J].海洋通报,2006,25(3):58-63. |
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| 作者姓名： | 孙鹤泉 沈永明 王永学 |
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| 作者单位： | 1. 天津大学精密仪器与光电子工程学院,天津,300072;国家海洋技术中心,天津,300111
2. 大连理工大学海岸和近海工程国家重点实验室,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金;中国科学院资助项目;教育部长江学者和创新团队发展计划;中国博士后科学基金 |
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| 摘 要： | Hartley变换是一种基于谐函数的实变换,具有Fourier变换的特性,在海洋工程中使用Fourier变换的大部分应用都可以通过Hartley变换实现,并且快速Hartley变换的计算效率是快速Fourier变换的2倍,并易于实现,所以Hartley变换可以在许多应用中代替Fourier变换。详细介绍了Hartley变换在海洋工程领域的应用,包括:波谱分析、波浪分离、PIV(粒子图像测速法)技术和微分方程的Hartley域变换,举例说明了Hartley变换在节约计算空间和提高计算效率上具备的优越性。
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| 关 键 词： | Hartley变换 Fourier变换 波谱 波浪分离 PIV |
| 文章编号： | 1001-6392（2006）03-0058-06 |
| 收稿时间： | 2005-05-10 |
| 修稿时间： | 2005-05-102005-09-07 |
The Application of Hartley Transform to Ocean Engineering |
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| SUN Hequan,SHEN Yongming,WANG Yongxue.The Application of Hartley Transform to Ocean Engineering[J].Marine Science Bulletin,2006,25(3):58-63. |
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| Authors: | SUN Hequan SHEN Yongming WANG Yongxue |
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| Abstract: | The Hartley transform is a real transform based on harmonic functions and has some characteristics similar to the Fourier transform. Most applications in ocean engineering requiring the Fourier transform can be performed by the Hartley transform. The fast Hartley transform is twice faster and more convenient to handle than the fast Fourier transform, so it is a real valued alternative to the complex Fourier transform in many applications. The use of the Hartley transform is presented in detail in this paper, including wave spectral analysis, separation of waves, cross-correlation in PIV technique and expression of equation in the Hartley domain. The examples in the paper show the advantage and efficiency of the Hartley transform over the Fourier transform. |
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| Keywords: | Hartley Transform Fourier transform Wave spectrum Separation of waves PIV |
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