用于扫描统计的高效回归模型
Efficient Regression Models for Scan Statistics
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中文总结 AI 辅助
该研究针对扫描统计提出新型高效回归模型,将原O(n⁴)复杂度优化为线性时间,可有效检测合成异常与干涉天文学的真实平台化问题。
中文摘要 AI 辅助
我们提出了一类针对实值信号扫描统计的新型回归模型,这类模型可更好地拟合非平稳信号,以对比扫描统计识别出的区间异常。我们的模型可表示广义似然比统计量。对于长度为n的信号,这类方法原本需要O(n⁴)的计算量,我们通过算法改进得到了线性时间算法(假设最大区间宽度受限)。我们的方法,尤其是基于Nadaraya-Watson核回归的方法,在检测人工植入的异常以及识别干涉天文学中真实的“平台化”问题时表现尤为出色。
英文摘要
We introduce a new class of regression models for scan statistics on real-valued signals. These allow for improved fitting of non-stationary signals to contrast with the interval anomalies identified by the scan statistics. Our models can represent generalized likelihood ratio statistics. While these methods naively require $O(n^4)$ for a length $n$ signal, we provide algorithmic improvements which lead to linear time algorithms (with assumptions on max interval width). Our methods, especially ones based on Nadaraya-Watson kernel regression, are demonstrated as especially effective in detecting both synthetically planted anomalies, and for identifying a real ``platforming'' issue in interferometric astronomy.
发表机构
- University of Utah(犹他大学)
- CosmicAI(宇宙人工智能公司)
- National Radio Astronomy Observatory(国家射电天文台)
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