Zhang, Sibao; Guan, Chunmei; Xi, Xiaozhong The integer solutions of Euler equation \(\varphi \left( {xy} \right) = {k_1}\varphi \left( x \right) + {k_2}\varphi \left( y \right)\left( {{k_1} \neq {k_2}} \right)\). (Chinese. English summary) Zbl 1389.11058 J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 7-10 (2017). MSC: 11B68 11D72 PDFBibTeX XMLCite \textit{S. Zhang} et al., J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 7--10 (2017; Zbl 1389.11058) Full Text: DOI
Yuan, Chang’an; Zheng, Yan; Qin, Xiao; Zhou, Kai; Zhao, Qingbei The medical image segmentation method of improved RSF active contour model. (Chinese. English summary) Zbl 1389.92024 J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 34-38, 44 (2017). MSC: 92C55 68U10 68T10 PDFBibTeX XMLCite \textit{C. Yuan} et al., J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 34--38, 44 (2017; Zbl 1389.92024) Full Text: DOI
Hu, Xiaoyan; Han, Huili Barycentric interpolation collocation method for solving Fredholm integral equation of fractional order. (Chinese. English summary) Zbl 1413.65484 J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 17-23 (2017). MSC: 65R20 45B05 PDFBibTeX XMLCite \textit{X. Hu} and \textit{H. Han}, J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 17--23 (2017; Zbl 1413.65484) Full Text: DOI
Fan, Sujun; Zhao, Ruibin; Guan, Yue; Wu, Yanru; Wang, Minyan Rota-Baxter operators on a class of 4-dimensional solvable Lie algebras. (Chinese. English summary) Zbl 1389.17012 J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 11-16, 23 (2017). MSC: 17B30 17B38 PDFBibTeX XMLCite \textit{S. Fan} et al., J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 11--16, 23 (2017; Zbl 1389.17012) Full Text: DOI
Song, Xiangdong; Yang, Yi The improvement of \(R\) and \(s\) control charts. (Chinese. English summary) Zbl 1389.62175 J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 1-6 (2017). MSC: 62P30 62H20 PDFBibTeX XMLCite \textit{X. Song} and \textit{Y. Yang}, J. Zhengzhou Univ., Nat. Sci. Ed. 49, No. 1, 1--6 (2017; Zbl 1389.62175) Full Text: DOI