Xu, Shuiqing; Feng, Li; Chai, Yi; Cheng, Tingli; He, Yigang The extrapolation theorem for discrete signals in the offset linear canonical transform domain. (English) Zbl 1509.94037 Circuits Syst. Signal Process. 41, No. 1, 609-620 (2022). MSC: 94A12 PDFBibTeX XMLCite \textit{S. Xu} et al., Circuits Syst. Signal Process. 41, No. 1, 609--620 (2022; Zbl 1509.94037) Full Text: DOI
Chaudhary, Naveed Ishtiaq; Raja, Muhammad Asif Zahoor; He, Yigang; Aslam Khan, Zeshan; Machado, J. A. Tenreiro Design of multi innovation fractional LMS algorithm for parameter estimation of input nonlinear control autoregressive systems. (English) Zbl 1481.93148 Appl. Math. Modelling 93, 412-425 (2021). MSC: 93E35 94A12 PDFBibTeX XMLCite \textit{N. I. Chaudhary} et al., Appl. Math. Modelling 93, 412--425 (2021; Zbl 1481.93148) Full Text: DOI
Xu, Shuiqing; Chen, Zhiwei; Chai, Yi; He, Yigang; Li, Xiang Sampling of bandlimited signals in the offset linear canonical transform domain based on reproducing kernel Hilbert space. (English) Zbl 1434.94045 Int. J. Wavelets Multiresolut. Inf. Process. 18, No. 2, Article ID 1950054, 14 p. (2020). MSC: 94A20 94A12 PDFBibTeX XMLCite \textit{S. Xu} et al., Int. J. Wavelets Multiresolut. Inf. Process. 18, No. 2, Article ID 1950054, 14 p. (2020; Zbl 1434.94045) Full Text: DOI
Yang, Xuan-Bing; He, Yi-Gang; Li, Chun-Lai; Liu, Chang-Qing Analysis, stabilization, and DSP-based implementation of a chaotic system with nonhyperbolic equilibrium. (English) Zbl 1432.37064 Complexity 2020, Article ID 6786832, 11 p. (2020). MSC: 37D45 34H10 34D20 PDFBibTeX XMLCite \textit{X.-B. Yang} et al., Complexity 2020, Article ID 6786832, 11 p. (2020; Zbl 1432.37064) Full Text: DOI
Liu, Changqing; He, Yigang; Peng, Guanghan The stabilization effect of self-delayed flux integral for two-lane lattice hydrodynamic model. (English) Zbl 07571225 Physica A 535, Article ID 122421, 6 p. (2019). MSC: 82-XX PDFBibTeX XMLCite \textit{C. Liu} et al., Physica A 535, Article ID 122421, 6 p. (2019; Zbl 07571225) Full Text: DOI
Liu, Changqing; He, Yigang; Peng, Guanghan The impact of the density difference memory integral on traffic stability in two-lane lattice hydrodynamic model. (English) Zbl 07570903 Physica A 532, Article ID 121750, 6 p. (2019). MSC: 82-XX PDFBibTeX XMLCite \textit{C. Liu} et al., Physica A 532, Article ID 121750, 6 p. (2019; Zbl 07570903) Full Text: DOI
Jiang, Canghua; Xie, Kun; Yu, Changjun; Yu, Ming; Wang, Hai; He, Yigang; Teo, Kok Lay A sequential computational approach to optimal control problems for differential-algebraic systems based on efficient implicit Runge-Kutta integration. (English) Zbl 1480.49031 Appl. Math. Modelling 58, 313-330 (2018). MSC: 49M25 49M05 PDFBibTeX XMLCite \textit{C. Jiang} et al., Appl. Math. Modelling 58, 313--330 (2018; Zbl 1480.49031) Full Text: DOI
Xu, Shuiqing; Huang, Lei; Chai, Yi; He, Yigang Nonuniform sampling theorems for bandlimited signals in the offset linear canonical transform. (English) Zbl 1435.94108 Circuits Syst. Signal Process. 37, No. 8, 3227-3244 (2018). MSC: 94A20 94A12 PDFBibTeX XMLCite \textit{S. Xu} et al., Circuits Syst. Signal Process. 37, No. 8, 3227--3244 (2018; Zbl 1435.94108) Full Text: DOI
Yang, Xuan-Bing; He, Yi-Gang; Li, Chun-Lai Dynamics feature and synchronization of a robust fractional-order chaotic system. (English) Zbl 1407.37055 Complexity 2018, Article ID 8797314, 12 p. (2018). MSC: 37D45 34H10 34D06 PDFBibTeX XMLCite \textit{X.-B. Yang} et al., Complexity 2018, Article ID 8797314, 12 p. (2018; Zbl 1407.37055) Full Text: DOI
Cheng, Yingying; Yang, Chen; Wen, Guanghui; He, Yigang Adaptive saturated finite-time control algorithm for buck-type DC-DC converter systems. (English) Zbl 1376.93053 Int. J. Adapt. Control Signal Process. 31, No. 10, 1428-1436 (2017). MSC: 93C40 93B35 93B40 93C15 PDFBibTeX XMLCite \textit{Y. Cheng} et al., Int. J. Adapt. Control Signal Process. 31, No. 10, 1428--1436 (2017; Zbl 1376.93053) Full Text: DOI
Chen, Liping; Wu, Ranchao; Chu, Zhaobi; He, Yigang Stabilization of fractional-order coupled systems with time delay on networks. (English) Zbl 1373.93130 Nonlinear Dyn. 88, No. 1, 521-528 (2017). MSC: 93B52 34A08 34B45 93B51 PDFBibTeX XMLCite \textit{L. Chen} et al., Nonlinear Dyn. 88, No. 1, 521--528 (2017; Zbl 1373.93130) Full Text: DOI
Chen, Liping; Wu, Ranchao; Chu, Zhaobi; He, Yigang; Yin, Lisheng Pinning synchronization of fractional-order delayed complex networks with non-delayed and delayed couplings. (English) Zbl 1367.93014 Int. J. Control 90, No. 6, 1245-1255 (2017). MSC: 93A14 34A08 93A15 PDFBibTeX XMLCite \textit{L. Chen} et al., Int. J. Control 90, No. 6, 1245--1255 (2017; Zbl 1367.93014) Full Text: DOI
Chen, Liping; Pan, Wei; Wu, Ranchao; Wang, Kunpeng; He, Yigang Generation and circuit implementation of fractional-order multi-scroll attractors. (English) Zbl 1355.34014 Chaos Solitons Fractals 85, 22-31 (2016). MSC: 34A08 34C28 37D45 37M05 94C05 PDFBibTeX XMLCite \textit{L. Chen} et al., Chaos Solitons Fractals 85, 22--31 (2016; Zbl 1355.34014) Full Text: DOI
Jin, Xiao-Zheng; He, Yi-Gang; Wang, Dan Adaptive finite-time synchronization of a class of pinned and adjustable complex networks. (English) Zbl 1349.34206 Nonlinear Dyn. 85, No. 3, 1393-1403 (2016). MSC: 34D06 93C40 90B10 93D30 PDFBibTeX XMLCite \textit{X.-Z. Jin} et al., Nonlinear Dyn. 85, No. 3, 1393--1403 (2016; Zbl 1349.34206) Full Text: DOI
Du, Haibo; Cheng, Yingying; He, Yigang; Jia, Ruting Second-order consensus for nonlinear leader-following multi-agent systems via dynamic output feedback control. (English) Zbl 1333.93005 Int. J. Robust Nonlinear Control 26, No. 2, 329-344 (2016). MSC: 93A14 68T42 93B52 93C10 93D05 93C15 PDFBibTeX XMLCite \textit{H. Du} et al., Int. J. Robust Nonlinear Control 26, No. 2, 329--344 (2016; Zbl 1333.93005) Full Text: DOI
Cheng, Yingying; Du, Haibo; He, Yigang; Jia, Ruting Robust finite-time synchronization of coupled harmonic oscillations with external disturbance. (English) Zbl 1395.93177 J. Franklin Inst. 352, No. 10, 4366-4381 (2015). MSC: 93B35 93C55 93C73 93A13 93B52 PDFBibTeX XMLCite \textit{Y. Cheng} et al., J. Franklin Inst. 352, No. 10, 4366--4381 (2015; Zbl 1395.93177) Full Text: DOI
Chen, Liping; Wu, Ranchao; He, Yigang; Yin, Lisheng Robust stability and stabilization of fractional-order linear systems with polytopic uncertainties. (English) Zbl 1338.93293 Appl. Math. Comput. 257, 274-284 (2015). MSC: 93D09 34A08 93D21 PDFBibTeX XMLCite \textit{L. Chen} et al., Appl. Math. Comput. 257, 274--284 (2015; Zbl 1338.93293) Full Text: DOI
Tong, Yaonan; He, Yigang; Yin, Baiqiang; Yu, Wenxin; Long, Ying Poles-shared realization of Morlet complex wavelet transform using switched-current circuits. (Chinese. English summary) Zbl 1340.94104 J. Hunan Univ., Nat. Sci. 42, No. 4, 55-62 (2015). MSC: 94C10 94C05 42C40 PDFBibTeX XMLCite \textit{Y. Tong} et al., J. Hunan Univ., Nat. Sci. 42, No. 4, 55--62 (2015; Zbl 1340.94104)
Chen, Liping; Wu, Ranchao; He, Yigang; Chai, Yi Adaptive sliding-mode control for fractional-order uncertain linear systems with nonlinear disturbances. (English) Zbl 1345.93086 Nonlinear Dyn. 80, No. 1-2, 51-58 (2015). MSC: 93C40 93C10 93C15 93C41 93D09 37M05 37N35 34A08 PDFBibTeX XMLCite \textit{L. Chen} et al., Nonlinear Dyn. 80, No. 1--2, 51--58 (2015; Zbl 1345.93086) Full Text: DOI
Du, Haibo; Cheng, Yingying; He, Yigang; Jia, Ruting Finite-time output feedback control for a class of second-order nonlinear systems with application to DC-DC buck converters. (English) Zbl 1345.93056 Nonlinear Dyn. 78, No. 3, 2021-2030 (2014). MSC: 93B52 93C10 93D15 78A55 94C05 37M05 37N35 PDFBibTeX XMLCite \textit{H. Du} et al., Nonlinear Dyn. 78, No. 3, 2021--2030 (2014; Zbl 1345.93056) Full Text: DOI
Yu, Wenxin; He, Yigang; Wu, Xianming; Gao, Kun Controllability of singular linear systems by Legendre wavelets. (English) Zbl 1307.93072 J. Control Sci. Eng. 2014, Article ID 573959, 4 p. (2014). MSC: 93B05 93C05 42C40 PDFBibTeX XMLCite \textit{W. Yu} et al., J. Control Sci. Eng. 2014, Article ID 573959, 4 p. (2014; Zbl 1307.93072) Full Text: DOI
Cheng, Yingying; Du, Haibo; He, Yigang; Jia, Ruting Finite-time tracking control for a class of high-order nonlinear systems and its applications. (English) Zbl 1306.93037 Nonlinear Dyn. 76, No. 2, 1133-1140 (2014). MSC: 93C10 93C95 PDFBibTeX XMLCite \textit{Y. Cheng} et al., Nonlinear Dyn. 76, No. 2, 1133--1140 (2014; Zbl 1306.93037) Full Text: DOI
Yu, Wenxin; He, Yigang On the well-posedness of the incompressible porous media equation in Triebel-Lizorkin spaces. (English) Zbl 1299.35246 Bound. Value Probl. 2014, Paper No. 95, 11 p. (2014). MSC: 35Q35 76S05 76D03 PDFBibTeX XMLCite \textit{W. Yu} and \textit{Y. He}, Bound. Value Probl. 2014, Paper No. 95, 11 p. (2014; Zbl 1299.35246) Full Text: DOI
Chen, Liping; He, Yigang; Chai, Yi; Wu, Ranchao New results on stability and stabilization of a class of nonlinear fractional-order systems. (English) Zbl 1283.93138 Nonlinear Dyn. 75, No. 4, 633-641 (2014). MSC: 93C10 93D20 26A33 93B52 34C28 PDFBibTeX XMLCite \textit{L. Chen} et al., Nonlinear Dyn. 75, No. 4, 633--641 (2014; Zbl 1283.93138) Full Text: DOI
Hu, Qinchun; He, Yigang; He, Jing Time-domain implementation of Gaussian-like wavelet transform based on switched current circuits. (Chinese. English summary) Zbl 1313.42096 J. Guangxi Norm. Univ., Nat. Sci. 31, No. 4, 18-22 (2013). MSC: 42C40 94C05 PDFBibTeX XMLCite \textit{Q. Hu} et al., J. Guangxi Norm. Univ., Nat. Sci. 31, No. 4, 18--22 (2013; Zbl 1313.42096)
Yu, Wenxin; He, Yigang; Tong, Yaonan; Luo, Qiwu; Wu, Xianming Regularity of Hölder continuous solutions of the supercritical porous media equation. (English) Zbl 1291.76318 Bound. Value Probl. 2013, Paper No. 225, 10 p. (2013). MSC: 76S05 76D03 PDFBibTeX XMLCite \textit{W. Yu} et al., Bound. Value Probl. 2013, Paper No. 225, 10 p. (2013; Zbl 1291.76318) Full Text: DOI
Yu, Wenxin; He, Yigang Blowup of smooth solutions for an aggregation equation. (English) Zbl 1293.35056 Abstr. Appl. Anal. 2013, Article ID 531046, 5 p. (2013). MSC: 35B44 PDFBibTeX XMLCite \textit{W. Yu} and \textit{Y. He}, Abstr. Appl. Anal. 2013, Article ID 531046, 5 p. (2013; Zbl 1293.35056) Full Text: DOI
Guo, Wentao; He, Yigang DNA code word designs based on a mixed ant colony algorithm. (Chinese. English summary) Zbl 1289.92039 J. Numer. Methods Comput. Appl. 34, No. 2, 105-116 (2013). MSC: 92D20 90C59 92-08 PDFBibTeX XMLCite \textit{W. Guo} and \textit{Y. He}, J. Numer. Methods Comput. Appl. 34, No. 2, 105--116 (2013; Zbl 1289.92039)
Du, Haibo; He, Yigang; Cheng, Yingying Finite-time cooperative tracking control for a class of second-order nonlinear multi-agent systems. (English) Zbl 1274.93008 Kybernetika 49, No. 4, 507-523 (2013). MSC: 93A14 93C10 93D15 93D21 PDFBibTeX XMLCite \textit{H. Du} et al., Kybernetika 49, No. 4, 507--523 (2013; Zbl 1274.93008) Full Text: Link
Yu, Wenxin; He, Yigang; Luo, Qiwu; Zheng, Jian; Wu, Xianming Boundedness for multilinear commutator of Marcinkiewicz operator with variable kernels on Hardy and Herz-Hardy spaces. (English) Zbl 1280.42011 J. Inequal. Appl. 2012, Paper No. 308, 9 p. (2012). MSC: 42B20 42B25 PDFBibTeX XMLCite \textit{W. Yu} et al., J. Inequal. Appl. 2012, Paper No. 308, 9 p. (2012; Zbl 1280.42011) Full Text: DOI
Man, Juanjuan; Guo, Shangjiang; He, Yigang Effects of short-cut in a delayed ring network. (English) Zbl 1270.34189 Int. J. Bifurcation Chaos Appl. Sci. Eng. 22, No. 3, Article ID 1250054, 25 p. (2012). MSC: 34K60 92B20 34D06 34K25 34K20 34K18 PDFBibTeX XMLCite \textit{J. Man} et al., Int. J. Bifurcation Chaos Appl. Sci. Eng. 22, No. 3, Article ID 1250054, 25 p. (2012; Zbl 1270.34189) Full Text: DOI
Ying, Jinyong; Guo, Shangjiang; He, Yigang Multiple periodic solutions in a delay-coupled system of neural oscillators. (English) Zbl 1251.34089 Nonlinear Anal., Real World Appl. 12, No. 5, 2767-2783 (2011). Reviewer: Sergiy Yanchuk (Berlin) MSC: 34K13 34K18 34K31 34K20 PDFBibTeX XMLCite \textit{J. Ying} et al., Nonlinear Anal., Real World Appl. 12, No. 5, 2767--2783 (2011; Zbl 1251.34089) Full Text: DOI
Jiang, Can; Guo, Shangjiang; He, Yigang Dynamics in time-delay recurrently coupled oscillators. (English) Zbl 1215.34101 Int. J. Bifurcation Chaos Appl. Sci. Eng. 21, No. 3, 775-788 (2011). MSC: 34K60 34K18 34K13 34K17 34K19 PDFBibTeX XMLCite \textit{C. Jiang} et al., Int. J. Bifurcation Chaos Appl. Sci. Eng. 21, No. 3, 775--788 (2011; Zbl 1215.34101) Full Text: DOI
Huang, Chuangxia; Yang, Xinsong; He, Yigang; Huang, Lehua Stability of stochastic reaction-diffusion recurrent neural networks with unbounded distributed delays. (English) Zbl 1214.93088 Discrete Dyn. Nat. Soc. 2011, Article ID 570295, 16 p. (2011). MSC: 93D20 60H30 35K57 PDFBibTeX XMLCite \textit{C. Huang} et al., Discrete Dyn. Nat. Soc. 2011, Article ID 570295, 16 p. (2011; Zbl 1214.93088) Full Text: DOI EuDML
Yin, Xin; Zhou, Ye; He, Yigang Prediction of chaotic time series based on neural networks optimized by hybrid algorithm. (Chinese. English summary) Zbl 1236.62117 J. Hunan Univ., Nat. Sci. 37, No. 6, 41-45 (2010). MSC: 62M10 62M20 37M10 37D45 90C59 90C90 65C60 PDFBibTeX XMLCite \textit{X. Yin} et al., J. Hunan Univ., Nat. Sci. 37, No. 6, 41--45 (2010; Zbl 1236.62117)
Huang, Chuangxia; Huang, Lehua; He, Yigang Mean square exponential stability of stochastic Cohen-Grossberg neural networks with unbounded distributed delays. (English) Zbl 1204.34106 Discrete Dyn. Nat. Soc. 2010, Article ID 513218, 15 p. (2010). MSC: 34K50 92B20 34K20 PDFBibTeX XMLCite \textit{C. Huang} et al., Discrete Dyn. Nat. Soc. 2010, Article ID 513218, 15 p. (2010; Zbl 1204.34106) Full Text: DOI EuDML
Zhang, Ping; Guo, Shangjiang; He, Yigang Dynamics of a delayed two-coupled oscillator with excitatory-to-excitatory connection. (English) Zbl 1210.34117 Appl. Math. Comput. 216, No. 2, 631-646 (2010). Reviewer: Yuming Chen (Waterloo) MSC: 34K60 34K18 34K20 34C15 34D06 92B20 PDFBibTeX XMLCite \textit{P. Zhang} et al., Appl. Math. Comput. 216, No. 2, 631--646 (2010; Zbl 1210.34117) Full Text: DOI
Huang, Chuangxia; Yang, Xinsong; He, Yigang Stability analysis of stochastic reaction-diffusion Cohen-Grossberg neural networks with time-varying delays. (English) Zbl 1202.60086 Discrete Dyn. Nat. Soc. 2009, Article ID 439173, 18 p. (2009). MSC: 60H10 92B20 93E15 PDFBibTeX XMLCite \textit{C. Huang} et al., Discrete Dyn. Nat. Soc. 2009, Article ID 439173, 18 p. (2009; Zbl 1202.60086) Full Text: DOI EuDML
Huang, Chuangxia; He, Yigang; Huang, Lihong Stability analysis of non-autonomous stochastic Cohen-Grossberg neural networks. (English) Zbl 1176.92001 Nonlinear Dyn. 57, No. 3, 469-478 (2009). MSC: 92B20 PDFBibTeX XMLCite \textit{C. Huang} et al., Nonlinear Dyn. 57, No. 3, 469--478 (2009; Zbl 1176.92001) Full Text: DOI
Huang, Chuangxia; He, Yigang; Huang, Lihong New results of a class of two-neuron networks with time-varying delays. (English) Zbl 1159.92003 J. Inequal. Appl. 2008, Article ID 648148, 14 p. (2008). MSC: 92B20 68T05 34C60 34A40 PDFBibTeX XMLCite \textit{C. Huang} et al., J. Inequal. Appl. 2008, Article ID 648148, 14 p. (2008; Zbl 1159.92003) Full Text: DOI EuDML
Huang, Chuangxia; Chen, Ping; He, Yigang; Huang, Lihong; Tan, Wen Almost sure exponential stability of delayed Hopfield neural networks. (English) Zbl 1152.34372 Appl. Math. Lett. 21, No. 7, 701-705 (2008). MSC: 34K20 92B20 PDFBibTeX XMLCite \textit{C. Huang} et al., Appl. Math. Lett. 21, No. 7, 701--705 (2008; Zbl 1152.34372) Full Text: DOI
Huang, Chuangxia; He, Yigang; Wang, Hainu Mean square exponential stability of stochastic recurrent neural networks with time-varying delays. (English) Zbl 1152.60346 Comput. Math. Appl. 56, No. 7, 1773-1778 (2008). MSC: 60K20 62M45 PDFBibTeX XMLCite \textit{C. Huang} et al., Comput. Math. Appl. 56, No. 7, 1773--1778 (2008; Zbl 1152.60346) Full Text: DOI
Wang, Xiao-Hua; He, Yi-Gang A neural network approach to FIR filter design using frequency-response masking technique. (English) Zbl 1151.94421 Signal Process. 88, No. 12, 2917-2926 (2008). MSC: 94A12 PDFBibTeX XMLCite \textit{X.-H. Wang} and \textit{Y.-G. He}, Signal Process. 88, No. 12, 2917--2926 (2008; Zbl 1151.94421) Full Text: DOI
Huang, Chuangxia; He, Yigang; Huang, Lihong; Zhu, Wenji \(p\)th moment stability analysis of stochastic recurrent neural networks with time-varying delays. (English) Zbl 1144.93030 Inf. Sci. 178, No. 9, 2194-2203 (2008). MSC: 93E15 92B20 PDFBibTeX XMLCite \textit{C. Huang} et al., Inf. Sci. 178, No. 9, 2194--2203 (2008; Zbl 1144.93030) Full Text: DOI
Li, Hongmin; He, Yigang; Hu, Qinchun; Zhang, Ying A novel method for harmonic detection based on CMOS log-domain continuous wavelet transform circuit. (Chinese. English summary) Zbl 1174.94419 Proc. CSEE 27, No. 31, 57-63 (2007). MSC: 94C12 42C40 PDFBibTeX XMLCite \textit{H. Li} et al., Proc. CSEE 27, No. 31, 57--63 (2007; Zbl 1174.94419)
Huang, Chuangxia; He, Yigang; Huang, Lihong; Zhaohui, Yuan Hopf bifurcation analysis of two neurons with three delays. (English) Zbl 1149.34046 Nonlinear Anal., Real World Appl. 8, No. 3, 903-921 (2007). Reviewer: Sergiy Yanchuk (Berlin) MSC: 34K18 34K20 34K13 PDFBibTeX XMLCite \textit{C. Huang} et al., Nonlinear Anal., Real World Appl. 8, No. 3, 903--921 (2007; Zbl 1149.34046) Full Text: DOI
Huang, Chuangxia; Huang, Lihong; Feng, Jianfeng; Nai, Mingyong; He, Yigang Hopf bifurcation analysis for a two-neuron network with four delays. (English) Zbl 1149.34047 Chaos Solitons Fractals 34, No. 3, 795-812 (2007). Reviewer: Sergiy Yanchuk (Berlin) MSC: 34K18 34K20 34K19 92C20 PDFBibTeX XMLCite \textit{C. Huang} et al., Chaos Solitons Fractals 34, No. 3, 795--812 (2007; Zbl 1149.34047) Full Text: DOI
Huang, Chuangxia; He, Yigang; Huang, Lihong; Tan, Wen New results on the periodic solutions for a kind of Rayleigh equation with two deviating arguments. (English) Zbl 1161.34345 Math. Comput. Modelling 46, No. 5-6, 604-611 (2007). Reviewer: Gheorghe Moroşanu (Budapest) MSC: 34K13 47N20 PDFBibTeX XMLCite \textit{C. Huang} et al., Math. Comput. Modelling 46, No. 5--6, 604--611 (2007; Zbl 1161.34345) Full Text: DOI
Huang, Chuangxia; He, Yigang; Huang, Lihong Almost sure exponential stability of delayed cellular neural networks. (English) Zbl 1117.34078 Electron. J. Differ. Equ. 2007, Paper No. 44, 6 p. (2007). MSC: 34K50 60H10 34K20 PDFBibTeX XMLCite \textit{C. Huang} et al., Electron. J. Differ. Equ. 2007, Paper No. 44, 6 p. (2007; Zbl 1117.34078) Full Text: EuDML EMIS
Cai, Guochang; He, Yigang; Wu, Jie Neural networks for linear programming. (Chinese. English summary) Zbl 0896.68119 J. Hunan Univ. 23, No. 3, 87-91 (1996). MSC: 68T05 90C05 PDFBibTeX XMLCite \textit{G. Cai} et al., J. Hunan Univ. 23, No. 3, 87--91 (1996; Zbl 0896.68119)