# Correction: Li, Q.; Liang, S.Y. Incipient Fault Diagnosis of Rolling Bearings Based on Impulse-Step Impact Dictionary and Re-Weighted Minimizing Nonconvex Penalty Lq Regular Technique. Entropy 2017, 19, 421

^{1}

^{2}

^{*}

- 27.
- Sawalhi, N.; Randall, R.B. Vibration response of spalled rolling element bearing: observations, simulations and signal processing techniques to track the spall size. Mech. Syst. Signal Process.
**2011**, 25, 846–870. - 35.
- Lai, M.J; Wang, J.Y. An unconstrained l
_{q}minimization with 0 < q ≤ 1 for sparse solution of underdetermined linear systems. SIAM J. Optim.**2011**, 21, 82–101. - 36.
- Lai, M.J.; Xu, Y.Y.; Yin, W.T. Improved iteratively reweighted least squares for unconstrained smoothed l
_{q}minimization. SIAM J. Numer. Anal.**2013**, 51, 927–957. - 37.
- Wang, Y.; Wang, J.; Xu, Z. On recovery of block-sparse signals via mixed l
_{2}/l_{q}(0 < q ≤ 1) norm minimization. EURASIP J. Adv. Signal Process.**2013**, 2013, 76.

## Reference

- Li, Q.; Liang, S.Y. Incipient Fault Diagnosis of Rolling Bearings Based on Impulse-Step Impact Dictionary and Re-Weighted Minimizing Nonconvex Penalty Lq Regular Technique. Entropy
**2017**, 19, 421. [Google Scholar] [CrossRef] [Green Version]

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

## Share and Cite

**MDPI and ACS Style**

Li, Q.; Liang, S.Y.
Correction: Li, Q.; Liang, S.Y. Incipient Fault Diagnosis of Rolling Bearings Based on Impulse-Step Impact Dictionary and Re-Weighted Minimizing Nonconvex Penalty Lq Regular Technique. *Entropy* 2017, *19*, 421. *Entropy* **2020**, *22*, 483.
https://doi.org/10.3390/e22040483

**AMA Style**

Li Q, Liang SY.
Correction: Li, Q.; Liang, S.Y. Incipient Fault Diagnosis of Rolling Bearings Based on Impulse-Step Impact Dictionary and Re-Weighted Minimizing Nonconvex Penalty Lq Regular Technique. *Entropy* 2017, *19*, 421. *Entropy*. 2020; 22(4):483.
https://doi.org/10.3390/e22040483

**Chicago/Turabian Style**

Li, Qing, and Steven Y. Liang.
2020. "Correction: Li, Q.; Liang, S.Y. Incipient Fault Diagnosis of Rolling Bearings Based on Impulse-Step Impact Dictionary and Re-Weighted Minimizing Nonconvex Penalty Lq Regular Technique. *Entropy* 2017, *19*, 421" *Entropy* 22, no. 4: 483.
https://doi.org/10.3390/e22040483