通过自适应理性近似和草图绘制分散问题的响应行为替代建模
Davide Pradovera1, Ralf Hiptmair2, Ilaria Perugia3
1Department of Mathematics, Stockholm University, Stockholm, Sweden.
概括
本研究引入了使用理性近似的新算法,通过创建场放大替代模型来识别散射问题的共振行为. 两种方法,一种标准方法和一种混合方法,在精度和效率的数值测试中表现出卓越的性能.
科学领域:
- 计算物理学的计算物理.
- 数字分析 数字分析
- 波浪散射是一种波浪散射.
背景情况:
- 在散射问题中的共振行为对于理解波现象至关重要.
- 现有的识别共振的方法可能是计算密集和复杂的.
- 场放大,定义为解决方案操作者的规范,是共振的一个关键指标.
研究的目的:
- 开发新的,高效的算法,用于识别散射问题的 (几乎) 共振行为.
- 使用理性近似构建准确的替代模型进行场放大.
- 为拟议的合理近似技术提供理论基础.
主要方法:
- 使用理性近似来构建场放大替代模型.
- 导出理论结果,将场放大与散射运算子的光谱属性联系起来.
- 开发标准的理性近似方法和创新的混合方法,将根查找与辐射基函数结合起来.
- 采用适应性抽样策略以获得灵活性.
主要成果:
- 两个算法,一个标准算法和一个混合算法,在数值实验中表现出卓越的性能.
- 在两个表现最好的方法之间做出选择取决于是否优先考虑准确性或效率.
- 拟议的方法与离散化策略无关,不需要非真实波数计算.
结论:
- 新型基于理性近似的算法有效地识别散射问题的共振行为.
- 开发的替代模型为分析场放大提供了一个计算效率高的替代方案.
- 混合方法特别有希望,平衡准确性和计算成本.
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