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
laser microemission spectral analysis
laser microirradiation
laser microprobe
laser micro welding
laser mode
laser mode-locking
laser mode restriction technique
laser mode selection technology
laser modification
laser modulation technology
laser monochrome photography
laser multipass welding
laser multiphoton ion source
laser noise
laser nuclear fusion
laser obstacle avoidance sensor
laser occupational hazard
laser optics
laser optoacoustic detector
laser oscillating conditions
laser [oscillation] condition
laser oscillation condition
laser oscillation threshold
laser oscillator
laser output characteristic
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:2026/11/8 19:00:16