请输入您要查询的字词:
单词
smoothly clipped absolute deviation
释义
smoothly clipped absolute deviation
Encyclopedia
理学
回归分析
释
smoothly clipped absolute deviation
SCAD准则
为了解决Lasso(least absolute shrinkage and selection operator)回归系数估计偏差并让系数估计具有更优的性质的一种方法。尽管回归模型(least absolute shrinkage and selection operator,Lasso)提供了一种可以同时变量选择和参数估计的方法,且为后来众多带惩罚的正则化方法(regularization methods)奠定了基础,但是Lasso回归系数估计本身是有偏的,这是因为Lasso对所有系数都给予相同的惩罚。为此,Jianqing Fan和Runze Li在2001年提出SCAD(smoothly clipped absolute deviation)惩罚回归方法,对解决此类问题有着重要意义。
随便看
low flow
low flow forecasting
low flow investigation
low flow sampler
low frequency
low-frequency amplifier
Low Frequency Array
low frequency decrease load
low frequency disturbance processing
low frequency exciting force
low-frequency filter
low frequency fluctuation
low frequency impulse electrotherapy
low frequency noise
low frequency radio astronomy
low-frequency radio telescope
low-frequency resonance
low frequency signal tester
low frequency zonal Flow
low friction oil
low friction technology
low friction technology for piston-liner systems
low function forest
low-grade fault
low height service facilities
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2025/11/30 23:54:03