Edit Profile (opens in new tab) Kumar Upadhyay, Ranjit Compute Distance To: Compute Author ID: kumar-upadhyay.ranjit Published as: Upadhyay, Ranjit Kumar; Kumar Upadhyay, Ranjit Documents Indexed: 105 Publications since 1998, including 2 Books 1 Contribution as Editor Co-Authors: 74 Co-Authors with 102 Joint Publications 1,009 Co-Co-Authors all top 5 Co-Authors 4 single-authored 18 Rai, Vikas 12 Mondal, Argha 11 Kumari, Sangeeta 11 Parshad, Rana D. 11 Roy, Parimita 10 Agrawal, Rashmi 9 Jana, Debaldev 9 Thakur, Nilesh Kumar 8 Kumari, Nitu 8 Zhang, Zizhen 7 Iyengar, Satteluri R. K. 7 Tiwari, Satish Kumar 5 Datta, Jyotiska 5 Dubey, Balram 5 Quansah, Emmanuel 4 Mishra, Swati 4 Rao, Vadrevu Sree Hari 3 Kumari, Sarita 3 Mondal, Arnab 3 Naji, Raid Kamel 3 Sharma, Sanjeev Kumar 3 Teka, Wondimu 3 Tiwari, Vandana 3 Tripathi, Jai Prakash 2 Al Basheer, Aladeen 2 Aziz-Alaoui, Moulay-Ahmed 2 Basheer, Aladeen 2 Bhowmick, Suman 2 Das, Parthasakha 2 Das, Pritha 2 Paul, Chinmoy 2 Raw, Sharada Nandan 2 Vishwakarma, Gajendra Kumar 2 Zou, Junchen 1 Abderrahmane, Hamid Ait 1 Acharya, Sattwika 1 Antwi-Fordjour, Kwadwo 1 Banerjee, Malay 1 Batabyal, Saikat 1 Bi, Dianjie 1 Black, Kelly 1 Caur, Jasmine 1 Chu, Yugui 1 Das, Samhita 1 Dong, Yueping 1 Gangopadhyay, Gautam 1 Ghosh, Dibakar 1 Gupta, Rashi 1 Kumar, Pramod 1 Lyu, Jingjing 1 Madzvamuse, Anotida 1 Mistri, Kshitish Ch. 1 Ojha, Archana 1 Pal, Ashok Kumar 1 Patra, Atasi 1 Raw, Sharada Nandn 1 Saha, Sandip K. 1 Samanta, Guru Prasad 1 Sharma, Swarnali 1 Singh, Prerna 1 Sun, Guiquan 1 Takeuchi, Yasuhiro 1 Tiwari, Pankaj Kumar 1 Tiwari, S. P. 1 Venkataraman, Chandrasekhar 1 Verma, Renu 1 Wang, Jinshan 1 Wang, Yougang 1 Wei, Ruibin 1 Wu, Xiangjun 1 Wu, Yongping 1 Yu, Shengbin 1 Zeb, Anwar 1 Zhao, Tao all top 5 Serials 17 Chaos, Solitons and Fractals 11 International Journal of Bifurcation and Chaos in Applied Sciences and Engineering 6 Journal of Applied Mathematics and Computing 5 Applied Mathematics and Computation 5 Communications in Nonlinear Science and Numerical Simulation 5 Journal of Biological Systems 5 Nonlinear Analysis. Real World Applications 5 Advances in Difference Equations 4 Applied Mathematical Modelling 3 Mathematical Biosciences 3 Physica A 3 Differential Equations and Dynamical Systems 3 Nonlinear Dynamics 3 International Journal of Biomathematics 2 International Journal of Computer Mathematics 2 Chaos 2 International Journal of Nonlinear Sciences and Numerical Simulation 2 Nonlinear Analysis. Modelling and Control 1 Computers & Mathematics with Applications 1 IMA Journal of Applied Mathematics 1 Journal of the Franklin Institute 1 Journal of Mathematical Analysis and Applications 1 Mathematical Methods in the Applied Sciences 1 Mathematics and Computers in Simulation 1 Neural Networks 1 Complexity 1 Discrete Dynamics in Nature and Society 1 The ANZIAM Journal 1 Mathematical Modelling and Analysis 1 Journal of Zhejiang University. Science Edition 1 Journal of Computational Methods in Sciences and Engineering 1 Applied Mathematical Sciences (Ruse) 1 Asian-European Journal of Mathematics 1 ISRN Biomathematics 1 International Journal of Applied and Computational Mathematics 1 AIMS Mathematics all top 5 Fields 90 Biology and other natural sciences (92-XX) 43 Ordinary differential equations (34-XX) 39 Dynamical systems and ergodic theory (37-XX) 27 Partial differential equations (35-XX) 7 Numerical analysis (65-XX) 5 Calculus of variations and optimal control; optimization (49-XX) 5 Computer science (68-XX) 5 Systems theory; control (93-XX) 3 General and overarching topics; collections (00-XX) 3 Probability theory and stochastic processes (60-XX) 3 Statistical mechanics, structure of matter (82-XX) 2 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 2 Information and communication theory, circuits (94-XX) 1 Real functions (26-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 84 Publications have been cited 615 times in 432 Documents Cited by ▼ Year ▼ Chaos: An ecological reality? Zbl 0935.92037Upadhyay, Ranjit Kumar; Iyengar, S. R. K.; Rai, Vikas 44 1998 Effect of seasonality on the dynamics of 2 and 3 species prey - predator systems. Zbl 1072.92058Upadhyay, Ranjit Kumar; Iyengar, S. R. K. 40 2005 Dynamics of a three species food chain model with Crowley-Martin type functional response. Zbl 1198.37132Upadhyay, Ranjit Kumar; Naji, Raid Kamel 38 2009 Crisis-limited chaotic dynamics in ecological systems. Zbl 0977.92033Upadhyay, Ranjit Kumar; Rai, Vikas 27 2001 Top-predator interference and gestation delay as determinants of the dynamics of a realistic model food chain. Zbl 1352.92126Jana, Debaldev; Agrawal, Rashmi; Upadhyay, Ranjit Kumar 25 2014 Chaotic population dynamics and biology of the top-predator. Zbl 1057.92056Rai, Vikas; Upadhyay, Ranjit Kumar 20 2004 Modeling the virus dynamics in computer network with SVEIR model and nonlinear incident rate. Zbl 1377.34066Upadhyay, Ranjit Kumar; Kumari, Sangeeta; Misra, A. K. 18 2017 Complex dynamics of a three species food-chain model with Holling type IV functional response. Zbl 1272.49085Upadhyay, Ranjit Kumar; Raw, Sharada Nandan 17 2011 Multiple attractors and crisis route to chaos in a model food-chain. Zbl 1033.92038Upadhyay, Ranjit Kumar 17 2003 Wave of chaos in a diffusive system: generating realistic patterns of patchiness in plankton-fish dynamics. Zbl 1197.37121Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 16 2009 Introduction to mathematical modeling and chaotic dynamics. Zbl 1302.00059Kumar Upadhyay, Ranjit; Iyengar, Satteluri R. K. 15 2014 Stability and complexity in ecological systems. Zbl 0943.92033Upadhyay, Ranjit Kumar; Iyengar, S. R. K.; Rai, Vikas 14 2000 Spatiotemporal pattern formation in a diffusive predator-prey system: An analytical approach. Zbl 1181.35022Dubey, Balram; Kumari, Nitu; Upadhyay, Ranjit Kumar 14 2009 Complex dynamics of ecological systems under nonlinear harvesting: Hopf bifurcation and Turing instability. Zbl 1331.92136Upadhyay, Ranjit Kumar; Roy, Parimita; Datta, Jyotiska 13 2015 The role of top predator interference on the dynamics of a food chain model. Zbl 1277.92035Upadhyay, Ranjit Kumar; Naji, Raid Kamel; Raw, Sharada Nandn; Dubey, Balram 12 2013 Dynamics and responses of a predator-prey system with competitive interference and time delay. Zbl 1349.37092Upadhyay, Ranjit Kumar; Agrawal, Rashmi 12 2016 Chaos control and synchronization of a three-species food chain model via Holling functional response. Zbl 1179.92068Wu, Xiang-Jun; Li, Jie; Upadhyay, Ranjit Kumar 11 2010 Short-term recurrent chaos and role of toxin producing phytoplankton (TPP) on chaotic dynamics in aquatic systems. Zbl 1197.37122Upadhyay, Ranjit Kumar; Rao, V. Sree Hari 9 2009 Complex dynamics and synchronization in two non-identical chaotic ecological systems. Zbl 1198.37133Upadhyay, Ranjit Kumar; Rai, Vikas 9 2009 Observability of chaos and cycles in ecological systems: lessons from predator-prey models. Zbl 1182.92067Upadhyay, Ranjit Kumar 9 2009 On the explosive instability in a three-species food chain model with modified Holling type IV functional response. Zbl 1382.35137Parshad, Rana D.; Upadhyay, Ranjit Kumar; Mishra, Swati; Tiwari, Satish Kumar; Sharma, Swarnali 9 2017 Exploring dynamical complexity in diffusion driven predator-prey systems: effect of toxin producing phytoplankton and spatial heterogeneities. Zbl 1198.37131Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 9 2009 Mixed mode oscillations and synchronous activity in noise induced modified Morris-Lecar neural system. Zbl 1367.34067Upadhyay, Ranjit Kumar; Mondal, Argha; Teka, Wondimu W. 8 2017 Restoration and recovery of damaged eco-epidemiological systems: application to the Salton Sea, California, USA. Zbl 1261.92060Upadhyay, Ranjit Kumar; Raw, S. N.; Roy, P.; Rai, Vikas 8 2013 Evolving to the edge of chaos: Chance or necessity? Zbl 1142.92344Rai, Vikas; Upadhyay, Ranjit Kumar 8 2006 Diffusion-driven instabilities and spatio-temporal patterns in an aquatic predator-prey system with Beddington-DeAngelis type functional response. Zbl 1215.35161Upadhyay, Ranjit Kumar; Thakur, N. K.; Rai, V. 8 2011 Exploring the dynamics of a Holling-Tanner model with cannibalism in both predator and prey population. Zbl 1381.92072Al Basheer, Aladeen; Parshad, Rana D.; Quansah, Emmanuel; Yu, Shengbin; Kumar Upadhyay, Ranjit 8 2018 Spread of a disease and its effect on population dynamics in an eco-epidemiological system. Zbl 1470.92388Upadhyay, Ranjit Kumar; Roy, Parimita 7 2014 Ecological chaos and the choice of optimal harvesting policy. Zbl 1353.92109Upadhyay, Ranjit Kumar; Tiwari, S. K. 7 2017 Complex dynamics of sexually reproductive generalist predator and gestation delay in a food chain model: double Hopf-bifurcation to chaos. Zbl 1375.92042Agrawal, Rashmi; Jana, Debaldev; Kumar Upadhyay, Ranjit; Rao, V. Sree Hari 7 2017 Species extinction problem: genetic vs ecological factors. Zbl 0987.92031Upadhyay, Ranjit Kumar; Rai, Vikas; Iyengar, S. R. K. 6 2001 Dynamical consequences of predator interference in a tri-trophic model food chain. Zbl 1181.37120Naji, Raid Kamel; Upadhyay, Ranjit Kumar; Rai, Vikas 6 2010 Modeling the spread of bird flu and predicting outbreak diversity. Zbl 1154.92324Upadhyay, Ranjit Kumar; Kumari, Nitu; Rao, V. Sree Hari 6 2008 Wave of chaos in a spatial eco-epidemiological system: generating realistic patterns of patchiness in rabbit-lynx dynamics. Zbl 1348.92134Upadhyay, Ranjit Kumar; Roy, Parimita; Venkataraman, C.; Madzvamuse, A. 6 2016 Ecological dynamics of age selective harvesting of fish population: maximum sustainable yield and its control strategy. Zbl 1372.92083Jana, Debaldev; Agrawal, Rashmi; Upadhyay, Ranjit Kumar; Samanta, G. P. 6 2016 Bifurcation analysis of a modified Leslie-Gower model with Holling type-IV functional response and nonlinear prey harvesting. Zbl 1445.37075Zhang, Zizhen; Upadhyay, Ranjit Kumar; Datta, Jyotiska 6 2018 Deciphering dynamics of epidemic spread: the case of influenza virus. Zbl 1296.35201Upadhyay, Ranjit Kumar; Roy, Parimita; Rai, Vikas 5 2014 Dynamics of an SEIR epidemic model with nonlinear incidence and treatment rates. Zbl 1468.92060Upadhyay, Ranjit Kumar; Pal, Ashok Kumar; Kumari, Sangeeta; Roy, Parimita 5 2019 Dynamics of generalist predator in a stochastic environment: effect of delayed growth and prey refuge. Zbl 1410.34136Jana, Debaldev; Agrawal, Rashmi; Upadhyay, Ranjit Kumar 5 2015 Nonlinear non-equilibrium pattern formation in a spatial aquatic system: effect of fish predation. Zbl 1342.92034Upadhyay, Ranjit Kumar; Thakur, N. K.; Dubey, B. 4 2010 Discrete and data packet delays as determinants of switching stability in wireless sensor networks. Zbl 1481.34085Upadhyay, Ranjit Kumar; Kumari, Sangeeta 4 2019 Modeling the fear effect and stability of non-equilibrium patterns in mutually interfering predator-prey systems. Zbl 1433.92042Tiwari, Vandana; Tripathi, Jai Prakash; Mishra, Swati; Upadhyay, Ranjit Kumar 4 2020 Strategies for the existence of spatial patterns in predator-prey communities generated by cross-diffusion. Zbl 1430.92073Mishra, Swati; Upadhyay, Ranjit Kumar 4 2020 Emergence of spatial patterns in a damaged diffusive eco-epidemiological system. Zbl 1401.35296Upadhyay, Ranjit Kumar; Datta, Jyotiska; Dong, Yueping; Takeuchi, Yasuhiro 4 2018 Global dynamics of stochastic predator-prey model with mutual interference and prey defense. Zbl 1431.92125Upadhyay, Ranjit Kumar; Parshad, Rana D.; Antwi-Fordjour, Kwadwo; Quansah, Emmanuel; Kumari, Sarita 4 2019 Modeling the effect of mutual interference in a delay-induced predator-prey system. Zbl 1358.37126Upadhyay, Ranjit Kumar; Agrawal, Rashmi 4 2015 Synchronization of bursting neurons with a slowly varying d. c. current. Zbl 1373.92030Upadhyay, Ranjit Kumar; Mondal, Argha 4 2017 Finite time blowup in a realistic food-chain model. Zbl 1300.92085Parshad, Rana D.; Abderrahmane, Hamid Ait; Upadhyay, Ranjit Kumar; Kumari, Nitu 4 2013 Spiking and bursting patterns of fractional-order Izhikevich model. Zbl 07263234Teka, Wondimu W.; Upadhyay, Ranjit Kumar; Mondal, Argha 4 2018 Wave phenomena and edge of chaos in a diffusive predator-prey system under Allee effect. Zbl 1211.37120Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 3 2009 Fractional-order leaky integrate-and-fire model with long-term memory and power law dynamics. Zbl 1431.92025Teka, Wondimu W.; Upadhyay, Ranjit Kumar; Mondal, Argha 3 2017 Complex population dynamics in heterogeneous environments: effects of random and directed animal movements. Zbl 1401.92164Rai, Vikas; Upadhyay, Ranjit Kumar; Thakur, Nilesh Kumar 3 2012 Transmission dynamics of epidemic spread and outbreak of Ebola in West Africa: fuzzy modeling and simulation. Zbl 1422.92171Verma, Renu; Tiwari, S. P.; Upadhyay, Ranjit Kumar 3 2019 Complex dynamics of wetland ecosystem with nonlinear harvesting: application to Chilika lake in Odisha, India. Zbl 1319.34095Upadhyay, Ranjit Kumar; Tiwari, S. K.; Roy, Parimita 3 2015 Harmful algal blooms in fresh and marine water systems: the role of toxin producing phytoplankton. Zbl 1338.92114Thakur, Nilesh Kumar; Tiwari, S. K.; Upadhyay, Ranjit Kumar 3 2016 The gestation delay: a factor causing complex dynamics in Gause-type competition models. Zbl 1407.92119Zhang, Zizhen; Upadhyay, Ranjit Kumar; Agrawal, Rashmi; Datta, Jyotiska 3 2018 Delay-induced Hopf bifurcation of an SVEIR computer virus model with nonlinear incidence rate. Zbl 1448.68049Zhao, Tao; Zhang, Zizhen; Upadhyay, Ranjit Kumar 3 2018 Deterministic chaos versus stochastic oscillation in a prey-predator-top predator model. Zbl 1233.37060Upadhyay, Ranjit Kumar; Banerjee, Malay; Parshad, Rana; Raw, Sharada Nandan 2 2011 Modeling spatiotemporal dynamics of vole populations in Europe and America. Zbl 1181.92087Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 2 2010 Estimation of biophysical parameters in a neuron model under random fluctuations. Zbl 1427.92034Upadhyay, Ranjit Kumar; Paul, Chinmoy; Mondal, Argha; Vishwakarma, Gajendra K. 2 2018 Deciphering dynamics of recent epidemic spread and outbreak in West Africa: the case of Ebola virus. Zbl 1347.35225Upadhyay, Ranjit Kumar; Roy, Parimita 2 2016 Diffusive three species plankton model in the presence of toxic prey: application to Sundarban mangrove wetland. Zbl 1376.92052Thakur, Nilesh Kumar; Tiwari, S. K.; Dubey, B.; Upadhyay, Ranjit Kumar 2 2017 Complex dynamics of diffusive predator-prey system with Beddington-DeAngelis functional response: the role of prey-taxis. Zbl 1372.92093Thakur, Nilesh Kumar; Gupta, Rashi; Upadhyay, Ranjit Kumar 2 2017 Dynamics of an ecological model living on the edge of chaos. Zbl 1162.92337Upadhyay, Ranjit Kumar 2 2009 Disease spread and its effect on population dynamics in heterogeneous environment. Zbl 1334.35355Upadhyay, Ranjit Kumar; Roy, Parimita 2 2016 Salton sea: an ecosystem in crisis. Zbl 1405.92304Upadhyay, Ranjit Kumar; Kumari, Sarita; Kumari, Sangeeta; Rai, Vikas 2 2018 Long time dynamics of a three-species food chain model with Allee effect in the top predator. Zbl 1443.92166Parshad, Rana D.; Quansah, Emmanuel; Black, Kelly; Upadhyay, Ranjit Kumar; Tiwari, S. K.; Kumari, Nitu 2 2016 Modeling Zika transmission dynamics: prevention and control. Zbl 1451.92310Roy, Parimita; Kumar Upadhyay, Ranjit; Caur, Jasmine 2 2020 Bifurcation and bio-economic analysis of a prey-generalist predator model with Holling type IV functional response and nonlinear age-selective prey harvesting. Zbl 1448.92185Datta, Jyotiska; Jana, Debaldev; Upadhyay, Ranjit Kumar 2 2019 Exploring dynamical complexity in a time-delayed tumor-immune model. Zbl 1451.92164Das, Parthasakha; Upadhyay, Ranjit Kumar; Das, Pritha; Ghosh, Dibakar 2 2020 Optimal treatment strategies for delayed cancer-immune system with multiple therapeutic approach. Zbl 07501398Das, Parthasakha; Das, Samhita; Upadhyay, Ranjit Kumar; Das, Pritha 2 2020 Extinction and coexistence of competing prey species in ecological systems. Zbl 1112.92069Upadhyay, Ranjit Kumar; Iyengar, S. R. K. 1 2006 Dynamic relationship between the mutual interference and gestation delays of a hybrid tritrophic food chain model. Zbl 1431.92120Agrawal, Rashmi; Jana, Debaldev; Upadhyay, Ranjit Kumar; Sree Hari Rao, V. 1 2018 Investigation of an explosive food chain model with interference and inhibitory effects. Zbl 1485.92179Upadhyay, Ranjit Kumar; Mishra, Swati; Parshad, Rana D.; Lyu, Jingjing; Basheer, Aladeen Al 1 2017 Dynamics and patterns of species abundance in ocean: a mathematical modeling study. Zbl 1464.35368Kumari, Sarita; Upadhyay, Ranjit Kumar; Kumar, Pramod; Rai, Vikas 1 2021 Synchronization analysis through coupling mechanism in realistic neural models. Zbl 1443.34050Kumar Upadhyay, Ranjit; Mondal, Argha; Aziz-Alaoui, M. A. 1 2017 Spatiotemporal transmission dynamics of recent Ebola outbreak in Sierra Leone, West Africa: impact of control measures. Zbl 1398.92250Roy, Parimita; Upadhyay, Ranjit Kumar 1 2017 Predator interference effects on biological control: the “paradox” of the generalist predator revisited. Zbl 07249759Parshad, Rana D.; Bhowmick, Suman; Quansah, Emmanuel; Basheer, Aladeen; Upadhyay, Ranjit Kumar 1 2016 A predator-prey interaction model with self- and cross-diffusion in aquatic systems. Zbl 1302.92117Upadhyay, Ranjit Kumar; Patra, Atasi; Dubey, B.; Thakur, N. K. 1 2014 Synchronization and pattern formation in a memristive diffusive neuron model. Zbl 1471.92078Sharma, Sanjeev Kumar; Mondal, Arnab; Mondal, Argha; Upadhyay, Ranjit Kumar; Ma, Jun 1 2021 Dynamics of a modified excitable neuron model: diffusive instabilities and traveling wave solutions. Zbl 1403.92043Mondal, Argha; Upadhyay, Ranjit Kumar; Mondal, Arnab; Sharma, Sanjeev Kumar 1 2018 Finite time blow-up in a delayed diffusive population model with competitive interference. Zbl 1401.35185Parshad, Rana D.; Bhowmick, Suman; Quansah, Emmanuel; Agrawal, Rashmi; Upadhyay, Ranjit Kumar 1 2017 Virus dynamics of a distributed attack on a targeted network: effect of firewall and optimal control. Zbl 1464.94038Kumari, Sangeeta; Singh, Prerna; Upadhyay, Ranjit Kumar 1 2019 Spatial dynamics and pattern formation in biological populations. Zbl 1478.92003Kumar Upadhyay, Ranjit; Iyengar, Satteluri R. K. 1 2021 Dynamics and patterns of species abundance in ocean: a mathematical modeling study. Zbl 1464.35368Kumari, Sarita; Upadhyay, Ranjit Kumar; Kumar, Pramod; Rai, Vikas 1 2021 Synchronization and pattern formation in a memristive diffusive neuron model. Zbl 1471.92078Sharma, Sanjeev Kumar; Mondal, Arnab; Mondal, Argha; Upadhyay, Ranjit Kumar; Ma, Jun 1 2021 Spatial dynamics and pattern formation in biological populations. Zbl 1478.92003Kumar Upadhyay, Ranjit; Iyengar, Satteluri R. K. 1 2021 Modeling the fear effect and stability of non-equilibrium patterns in mutually interfering predator-prey systems. Zbl 1433.92042Tiwari, Vandana; Tripathi, Jai Prakash; Mishra, Swati; Upadhyay, Ranjit Kumar 4 2020 Strategies for the existence of spatial patterns in predator-prey communities generated by cross-diffusion. Zbl 1430.92073Mishra, Swati; Upadhyay, Ranjit Kumar 4 2020 Modeling Zika transmission dynamics: prevention and control. Zbl 1451.92310Roy, Parimita; Kumar Upadhyay, Ranjit; Caur, Jasmine 2 2020 Exploring dynamical complexity in a time-delayed tumor-immune model. Zbl 1451.92164Das, Parthasakha; Upadhyay, Ranjit Kumar; Das, Pritha; Ghosh, Dibakar 2 2020 Optimal treatment strategies for delayed cancer-immune system with multiple therapeutic approach. Zbl 07501398Das, Parthasakha; Das, Samhita; Upadhyay, Ranjit Kumar; Das, Pritha 2 2020 Dynamics of an SEIR epidemic model with nonlinear incidence and treatment rates. Zbl 1468.92060Upadhyay, Ranjit Kumar; Pal, Ashok Kumar; Kumari, Sangeeta; Roy, Parimita 5 2019 Discrete and data packet delays as determinants of switching stability in wireless sensor networks. Zbl 1481.34085Upadhyay, Ranjit Kumar; Kumari, Sangeeta 4 2019 Global dynamics of stochastic predator-prey model with mutual interference and prey defense. Zbl 1431.92125Upadhyay, Ranjit Kumar; Parshad, Rana D.; Antwi-Fordjour, Kwadwo; Quansah, Emmanuel; Kumari, Sarita 4 2019 Transmission dynamics of epidemic spread and outbreak of Ebola in West Africa: fuzzy modeling and simulation. Zbl 1422.92171Verma, Renu; Tiwari, S. P.; Upadhyay, Ranjit Kumar 3 2019 Bifurcation and bio-economic analysis of a prey-generalist predator model with Holling type IV functional response and nonlinear age-selective prey harvesting. Zbl 1448.92185Datta, Jyotiska; Jana, Debaldev; Upadhyay, Ranjit Kumar 2 2019 Virus dynamics of a distributed attack on a targeted network: effect of firewall and optimal control. Zbl 1464.94038Kumari, Sangeeta; Singh, Prerna; Upadhyay, Ranjit Kumar 1 2019 Exploring the dynamics of a Holling-Tanner model with cannibalism in both predator and prey population. Zbl 1381.92072Al Basheer, Aladeen; Parshad, Rana D.; Quansah, Emmanuel; Yu, Shengbin; Kumar Upadhyay, Ranjit 8 2018 Bifurcation analysis of a modified Leslie-Gower model with Holling type-IV functional response and nonlinear prey harvesting. Zbl 1445.37075Zhang, Zizhen; Upadhyay, Ranjit Kumar; Datta, Jyotiska 6 2018 Emergence of spatial patterns in a damaged diffusive eco-epidemiological system. Zbl 1401.35296Upadhyay, Ranjit Kumar; Datta, Jyotiska; Dong, Yueping; Takeuchi, Yasuhiro 4 2018 Spiking and bursting patterns of fractional-order Izhikevich model. Zbl 07263234Teka, Wondimu W.; Upadhyay, Ranjit Kumar; Mondal, Argha 4 2018 The gestation delay: a factor causing complex dynamics in Gause-type competition models. Zbl 1407.92119Zhang, Zizhen; Upadhyay, Ranjit Kumar; Agrawal, Rashmi; Datta, Jyotiska 3 2018 Delay-induced Hopf bifurcation of an SVEIR computer virus model with nonlinear incidence rate. Zbl 1448.68049Zhao, Tao; Zhang, Zizhen; Upadhyay, Ranjit Kumar 3 2018 Estimation of biophysical parameters in a neuron model under random fluctuations. Zbl 1427.92034Upadhyay, Ranjit Kumar; Paul, Chinmoy; Mondal, Argha; Vishwakarma, Gajendra K. 2 2018 Salton sea: an ecosystem in crisis. Zbl 1405.92304Upadhyay, Ranjit Kumar; Kumari, Sarita; Kumari, Sangeeta; Rai, Vikas 2 2018 Dynamic relationship between the mutual interference and gestation delays of a hybrid tritrophic food chain model. Zbl 1431.92120Agrawal, Rashmi; Jana, Debaldev; Upadhyay, Ranjit Kumar; Sree Hari Rao, V. 1 2018 Dynamics of a modified excitable neuron model: diffusive instabilities and traveling wave solutions. Zbl 1403.92043Mondal, Argha; Upadhyay, Ranjit Kumar; Mondal, Arnab; Sharma, Sanjeev Kumar 1 2018 Modeling the virus dynamics in computer network with SVEIR model and nonlinear incident rate. Zbl 1377.34066Upadhyay, Ranjit Kumar; Kumari, Sangeeta; Misra, A. K. 18 2017 On the explosive instability in a three-species food chain model with modified Holling type IV functional response. Zbl 1382.35137Parshad, Rana D.; Upadhyay, Ranjit Kumar; Mishra, Swati; Tiwari, Satish Kumar; Sharma, Swarnali 9 2017 Mixed mode oscillations and synchronous activity in noise induced modified Morris-Lecar neural system. Zbl 1367.34067Upadhyay, Ranjit Kumar; Mondal, Argha; Teka, Wondimu W. 8 2017 Ecological chaos and the choice of optimal harvesting policy. Zbl 1353.92109Upadhyay, Ranjit Kumar; Tiwari, S. K. 7 2017 Complex dynamics of sexually reproductive generalist predator and gestation delay in a food chain model: double Hopf-bifurcation to chaos. Zbl 1375.92042Agrawal, Rashmi; Jana, Debaldev; Kumar Upadhyay, Ranjit; Rao, V. Sree Hari 7 2017 Synchronization of bursting neurons with a slowly varying d. c. current. Zbl 1373.92030Upadhyay, Ranjit Kumar; Mondal, Argha 4 2017 Fractional-order leaky integrate-and-fire model with long-term memory and power law dynamics. Zbl 1431.92025Teka, Wondimu W.; Upadhyay, Ranjit Kumar; Mondal, Argha 3 2017 Diffusive three species plankton model in the presence of toxic prey: application to Sundarban mangrove wetland. Zbl 1376.92052Thakur, Nilesh Kumar; Tiwari, S. K.; Dubey, B.; Upadhyay, Ranjit Kumar 2 2017 Complex dynamics of diffusive predator-prey system with Beddington-DeAngelis functional response: the role of prey-taxis. Zbl 1372.92093Thakur, Nilesh Kumar; Gupta, Rashi; Upadhyay, Ranjit Kumar 2 2017 Investigation of an explosive food chain model with interference and inhibitory effects. Zbl 1485.92179Upadhyay, Ranjit Kumar; Mishra, Swati; Parshad, Rana D.; Lyu, Jingjing; Basheer, Aladeen Al 1 2017 Synchronization analysis through coupling mechanism in realistic neural models. Zbl 1443.34050Kumar Upadhyay, Ranjit; Mondal, Argha; Aziz-Alaoui, M. A. 1 2017 Spatiotemporal transmission dynamics of recent Ebola outbreak in Sierra Leone, West Africa: impact of control measures. Zbl 1398.92250Roy, Parimita; Upadhyay, Ranjit Kumar 1 2017 Finite time blow-up in a delayed diffusive population model with competitive interference. Zbl 1401.35185Parshad, Rana D.; Bhowmick, Suman; Quansah, Emmanuel; Agrawal, Rashmi; Upadhyay, Ranjit Kumar 1 2017 Dynamics and responses of a predator-prey system with competitive interference and time delay. Zbl 1349.37092Upadhyay, Ranjit Kumar; Agrawal, Rashmi 12 2016 Wave of chaos in a spatial eco-epidemiological system: generating realistic patterns of patchiness in rabbit-lynx dynamics. Zbl 1348.92134Upadhyay, Ranjit Kumar; Roy, Parimita; Venkataraman, C.; Madzvamuse, A. 6 2016 Ecological dynamics of age selective harvesting of fish population: maximum sustainable yield and its control strategy. Zbl 1372.92083Jana, Debaldev; Agrawal, Rashmi; Upadhyay, Ranjit Kumar; Samanta, G. P. 6 2016 Harmful algal blooms in fresh and marine water systems: the role of toxin producing phytoplankton. Zbl 1338.92114Thakur, Nilesh Kumar; Tiwari, S. K.; Upadhyay, Ranjit Kumar 3 2016 Deciphering dynamics of recent epidemic spread and outbreak in West Africa: the case of Ebola virus. Zbl 1347.35225Upadhyay, Ranjit Kumar; Roy, Parimita 2 2016 Disease spread and its effect on population dynamics in heterogeneous environment. Zbl 1334.35355Upadhyay, Ranjit Kumar; Roy, Parimita 2 2016 Long time dynamics of a three-species food chain model with Allee effect in the top predator. Zbl 1443.92166Parshad, Rana D.; Quansah, Emmanuel; Black, Kelly; Upadhyay, Ranjit Kumar; Tiwari, S. K.; Kumari, Nitu 2 2016 Predator interference effects on biological control: the “paradox” of the generalist predator revisited. Zbl 07249759Parshad, Rana D.; Bhowmick, Suman; Quansah, Emmanuel; Basheer, Aladeen; Upadhyay, Ranjit Kumar 1 2016 Complex dynamics of ecological systems under nonlinear harvesting: Hopf bifurcation and Turing instability. Zbl 1331.92136Upadhyay, Ranjit Kumar; Roy, Parimita; Datta, Jyotiska 13 2015 Dynamics of generalist predator in a stochastic environment: effect of delayed growth and prey refuge. Zbl 1410.34136Jana, Debaldev; Agrawal, Rashmi; Upadhyay, Ranjit Kumar 5 2015 Modeling the effect of mutual interference in a delay-induced predator-prey system. Zbl 1358.37126Upadhyay, Ranjit Kumar; Agrawal, Rashmi 4 2015 Complex dynamics of wetland ecosystem with nonlinear harvesting: application to Chilika lake in Odisha, India. Zbl 1319.34095Upadhyay, Ranjit Kumar; Tiwari, S. K.; Roy, Parimita 3 2015 Top-predator interference and gestation delay as determinants of the dynamics of a realistic model food chain. Zbl 1352.92126Jana, Debaldev; Agrawal, Rashmi; Upadhyay, Ranjit Kumar 25 2014 Introduction to mathematical modeling and chaotic dynamics. Zbl 1302.00059Kumar Upadhyay, Ranjit; Iyengar, Satteluri R. K. 15 2014 Spread of a disease and its effect on population dynamics in an eco-epidemiological system. Zbl 1470.92388Upadhyay, Ranjit Kumar; Roy, Parimita 7 2014 Deciphering dynamics of epidemic spread: the case of influenza virus. Zbl 1296.35201Upadhyay, Ranjit Kumar; Roy, Parimita; Rai, Vikas 5 2014 A predator-prey interaction model with self- and cross-diffusion in aquatic systems. Zbl 1302.92117Upadhyay, Ranjit Kumar; Patra, Atasi; Dubey, B.; Thakur, N. K. 1 2014 The role of top predator interference on the dynamics of a food chain model. Zbl 1277.92035Upadhyay, Ranjit Kumar; Naji, Raid Kamel; Raw, Sharada Nandn; Dubey, Balram 12 2013 Restoration and recovery of damaged eco-epidemiological systems: application to the Salton Sea, California, USA. Zbl 1261.92060Upadhyay, Ranjit Kumar; Raw, S. N.; Roy, P.; Rai, Vikas 8 2013 Finite time blowup in a realistic food-chain model. Zbl 1300.92085Parshad, Rana D.; Abderrahmane, Hamid Ait; Upadhyay, Ranjit Kumar; Kumari, Nitu 4 2013 Complex population dynamics in heterogeneous environments: effects of random and directed animal movements. Zbl 1401.92164Rai, Vikas; Upadhyay, Ranjit Kumar; Thakur, Nilesh Kumar 3 2012 Complex dynamics of a three species food-chain model with Holling type IV functional response. Zbl 1272.49085Upadhyay, Ranjit Kumar; Raw, Sharada Nandan 17 2011 Diffusion-driven instabilities and spatio-temporal patterns in an aquatic predator-prey system with Beddington-DeAngelis type functional response. Zbl 1215.35161Upadhyay, Ranjit Kumar; Thakur, N. K.; Rai, V. 8 2011 Deterministic chaos versus stochastic oscillation in a prey-predator-top predator model. Zbl 1233.37060Upadhyay, Ranjit Kumar; Banerjee, Malay; Parshad, Rana; Raw, Sharada Nandan 2 2011 Chaos control and synchronization of a three-species food chain model via Holling functional response. Zbl 1179.92068Wu, Xiang-Jun; Li, Jie; Upadhyay, Ranjit Kumar 11 2010 Dynamical consequences of predator interference in a tri-trophic model food chain. Zbl 1181.37120Naji, Raid Kamel; Upadhyay, Ranjit Kumar; Rai, Vikas 6 2010 Nonlinear non-equilibrium pattern formation in a spatial aquatic system: effect of fish predation. Zbl 1342.92034Upadhyay, Ranjit Kumar; Thakur, N. K.; Dubey, B. 4 2010 Modeling spatiotemporal dynamics of vole populations in Europe and America. Zbl 1181.92087Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 2 2010 Dynamics of a three species food chain model with Crowley-Martin type functional response. Zbl 1198.37132Upadhyay, Ranjit Kumar; Naji, Raid Kamel 38 2009 Wave of chaos in a diffusive system: generating realistic patterns of patchiness in plankton-fish dynamics. Zbl 1197.37121Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 16 2009 Spatiotemporal pattern formation in a diffusive predator-prey system: An analytical approach. Zbl 1181.35022Dubey, Balram; Kumari, Nitu; Upadhyay, Ranjit Kumar 14 2009 Short-term recurrent chaos and role of toxin producing phytoplankton (TPP) on chaotic dynamics in aquatic systems. Zbl 1197.37122Upadhyay, Ranjit Kumar; Rao, V. Sree Hari 9 2009 Complex dynamics and synchronization in two non-identical chaotic ecological systems. Zbl 1198.37133Upadhyay, Ranjit Kumar; Rai, Vikas 9 2009 Observability of chaos and cycles in ecological systems: lessons from predator-prey models. Zbl 1182.92067Upadhyay, Ranjit Kumar 9 2009 Exploring dynamical complexity in diffusion driven predator-prey systems: effect of toxin producing phytoplankton and spatial heterogeneities. Zbl 1198.37131Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 9 2009 Wave phenomena and edge of chaos in a diffusive predator-prey system under Allee effect. Zbl 1211.37120Upadhyay, Ranjit Kumar; Kumari, Nitu; Rai, Vikas 3 2009 Dynamics of an ecological model living on the edge of chaos. Zbl 1162.92337Upadhyay, Ranjit Kumar 2 2009 Modeling the spread of bird flu and predicting outbreak diversity. Zbl 1154.92324Upadhyay, Ranjit Kumar; Kumari, Nitu; Rao, V. Sree Hari 6 2008 Evolving to the edge of chaos: Chance or necessity? Zbl 1142.92344Rai, Vikas; Upadhyay, Ranjit Kumar 8 2006 Extinction and coexistence of competing prey species in ecological systems. Zbl 1112.92069Upadhyay, Ranjit Kumar; Iyengar, S. R. K. 1 2006 Effect of seasonality on the dynamics of 2 and 3 species prey - predator systems. Zbl 1072.92058Upadhyay, Ranjit Kumar; Iyengar, S. R. K. 40 2005 Chaotic population dynamics and biology of the top-predator. Zbl 1057.92056Rai, Vikas; Upadhyay, Ranjit Kumar 20 2004 Multiple attractors and crisis route to chaos in a model food-chain. Zbl 1033.92038Upadhyay, Ranjit Kumar 17 2003 Crisis-limited chaotic dynamics in ecological systems. Zbl 0977.92033Upadhyay, Ranjit Kumar; Rai, Vikas 27 2001 Species extinction problem: genetic vs ecological factors. Zbl 0987.92031Upadhyay, Ranjit Kumar; Rai, Vikas; Iyengar, S. R. K. 6 2001 Stability and complexity in ecological systems. Zbl 0943.92033Upadhyay, Ranjit Kumar; Iyengar, S. R. K.; Rai, Vikas 14 2000 Chaos: An ecological reality? Zbl 0935.92037Upadhyay, Ranjit Kumar; Iyengar, S. R. K.; Rai, Vikas 44 1998 all cited Publications top 5 cited Publications all top 5 Cited by 756 Authors 62 Kumar Upadhyay, Ranjit 17 Parshad, Rana D. 14 Kumari, Nitu 14 Zhang, Zizhen 12 Rai, Vikas 12 Zhao, Min 11 Jana, Debaldev 11 Wang, Weiming 9 Yu, Hengguo 8 Agrawal, Rashmi 8 Aziz-Alaoui, Moulay-Ahmed 8 Dai, Chuanjun 7 Dubey, Balram 7 Roy, Parimita 7 Thakur, Nilesh Kumar 7 Tripathi, Jai Prakash 7 Wang, Xiaoqin 6 Kumari, Sangeeta 6 Kundu, Soumen 6 Lin, Xiaolin 6 Naji, Raid Kamel 6 Quansah, Emmanuel 5 Agarwal, Ravi P. 5 Chattopadhyay, Joydev 5 Das, Pritha 5 Datta, Jyotiska 5 Kengne, Jacques 5 Pal, Nikhil Ranjan 5 Tiwari, Satish Kumar 5 Zhong, Shou-Ming 4 Bairagi, Nandadulal 4 Bashkirtseva, Irina Adol’fovna 4 Beauregard, Matthew A. 4 Bi, Dianjie 4 Cai, Yongli 4 Gakkhar, Sunita 4 Letellier, Christophe 4 Lin, Yezhi 4 Misra, Arvind Kumar 4 Mohammadi, Hakimeh 4 Rezapour, Shahram 4 Ryashko, Lev Borisovich 4 Samanta, Sudip K. 4 Tiwari, Pankaj Kumar 4 Wu, Xiangjun 4 Zhao, Tao 3 Banerjee, Malay 3 Basheer, Aladeen 3 Dai, Binxiang 3 Das, Parthasakha 3 Das, Samhita 3 Dhar, Joydip 3 Iyengar, Satteluri R. K. 3 Kouachi, Said 3 Kumar, Ankit 3 Maitra, Sarit 3 Mandal, Partha Sarathi 3 Merdan, Hüseyin 3 Mohan, Nishith 3 Pal, Samaresh 3 Rao, Vadrevu Sree Hari 3 Tang, Leiyu 3 Tian, Baodan 3 Tian, Yanling 3 Tiwari, Vandana 3 Wang, Hailing 3 Wei, Junjie 3 Yafia, Radouane 3 Yang, Ruizhi 3 Yuan, Sanling 3 Zou, Junchen 2 Abbas, Syed 2 Abderrahmane, Hamid Ait 2 Agnihotri, Kulbhushan 2 Aguirre, Luis Antonio 2 Al-Tuwairqi, Salma M. 2 Alebraheem, Jawdat 2 Antwi-Fordjour, Kwadwo 2 Avila-Vales, Eric Jose 2 Bahashwan, Walaa S. 2 Bao, Bocheng 2 Bao, Han 2 Batabyal, Saikat 2 Bhowmick, Amiya Ranjan 2 Bhowmick, Suman 2 Bi, Qinsheng 2 Black, Kelly 2 Bollt, Erik M. 2 Bouguima, Sidi Mohamed 2 Bugalia, Sarita 2 Camara, Baba Issa 2 Chatterjee, Anal 2 Chen, Mo 2 Chen, Shihua 2 Das, Harekrishna 2 Din, Qamar 2 Dong, Yaying 2 Dubey, Ved Prakash 2 Duman, Oktay 2 Fotsin, Hilaire Bertrand ...and 656 more Authors all top 5 Cited in 91 Serials 70 Chaos, Solitons and Fractals 38 International Journal of Bifurcation and Chaos in Applied Sciences and Engineering 26 Advances in Difference Equations 22 Journal of Applied Mathematics and Computing 21 Applied Mathematics and Computation 14 Applied Mathematical Modelling 13 Nonlinear Dynamics 13 International Journal of Biomathematics 12 Nonlinear Analysis. Real World Applications 11 Discrete Dynamics in Nature and Society 11 Communications in Nonlinear Science and Numerical Simulation 8 Computers & Mathematics with Applications 8 Mathematical Biosciences 8 Physica A 7 Complexity 6 Mathematical Problems in Engineering 6 Differential Equations and Dynamical Systems 6 Chaos 6 Journal of Biological Systems 5 Journal of Mathematical Analysis and Applications 5 Mathematics and Computers in Simulation 5 Journal of Theoretical Biology 5 Journal of Applied Analysis and Computation 4 Abstract and Applied Analysis 4 Discrete and Continuous Dynamical Systems. Series B 4 Mathematical Biosciences and Engineering 3 Journal of the Franklin Institute 3 Mathematical Methods in the Applied Sciences 3 Bulletin of Mathematical Biology 3 Journal of Biological Dynamics 3 AIMS Mathematics 2 Indian Journal of Pure & Applied Mathematics 2 International Journal of Systems Science 2 Automatica 2 Ricerche di Matematica 2 Acta Applicandae Mathematicae 2 Fractals 2 Nonlinear Analysis. Modelling and Control 2 Boundary Value Problems 2 Nonlinear Analysis. Hybrid Systems 2 International Journal of Differential Equations 2 ISRN Biomathematics 2 Journal of Applied Nonlinear Dynamics 2 International Journal of Applied and Computational Mathematics 1 Journal of Mathematical Biology 1 Physics Letters. A 1 ZAMP. Zeitschrift für angewandte Mathematik und Physik 1 International Journal of Mathematics and Mathematical Sciences 1 Journal of Computational and Applied Mathematics 1 Journal of Differential Equations 1 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 1 SIAM Journal on Control and Optimization 1 Theoretical Population Biology 1 Systems & Control Letters 1 Bulletin of the Iranian Mathematical Society 1 Physica D 1 Mathematical and Computer Modelling 1 Applications of Mathematics 1 International Journal of Computer Mathematics 1 Journal of Nonlinear Science 1 Computational and Applied Mathematics 1 Filomat 1 NoDEA. Nonlinear Differential Equations and Applications 1 Journal of Mathematical Chemistry 1 Mathematical and Computer Modelling of Dynamical Systems 1 Journal of Discrete Mathematical Sciences & Cryptography 1 Methodology and Computing in Applied Probability 1 Applied Sciences 1 Qualitative Theory of Dynamical Systems 1 International Journal of Nonlinear Sciences and Numerical Simulation 1 The ANZIAM Journal 1 Mathematical Modelling and Analysis 1 Dynamics of Continuous, Discrete & Impulsive Systems. Series A. Mathematical Analysis 1 Dynamics of Continuous, Discrete & Impulsive Systems. Series B. Applications & Algorithms 1 Communications on Pure and Applied Analysis 1 SIAM Journal on Applied Dynamical Systems 1 Cubo 1 Applications and Applied Mathematics 1 Mathematical Modelling of Natural Phenomena 1 Asian-European Journal of Mathematics 1 Communications in Theoretical Physics 1 Advances in Mathematical Physics 1 Journal of the Korean Society for Industrial and Applied Mathematics 1 Vestnik Udmurtskogo Universiteta. Matematika. Mekhanika. Komp’yuternye Nauki 1 Journal of Mathematics 1 Mathematics 1 International Journal of Engineering Mathematics 1 Nonautonomous Dynamical Systems 1 Journal of Function Spaces 1 Cogent Mathematics 1 Computational and Mathematical Biophysics all top 5 Cited in 27 Fields 359 Biology and other natural sciences (92-XX) 201 Ordinary differential equations (34-XX) 140 Dynamical systems and ergodic theory (37-XX) 82 Partial differential equations (35-XX) 32 Systems theory; control (93-XX) 21 Numerical analysis (65-XX) 17 Probability theory and stochastic processes (60-XX) 13 Calculus of variations and optimal control; optimization (49-XX) 13 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 12 Information and communication theory, circuits (94-XX) 10 Real functions (26-XX) 10 Computer science (68-XX) 8 Statistical mechanics, structure of matter (82-XX) 7 Difference and functional equations (39-XX) 7 Operator theory (47-XX) 5 Operations research, mathematical programming (90-XX) 3 Mechanics of particles and systems (70-XX) 2 Global analysis, analysis on manifolds (58-XX) 1 General and overarching topics; collections (00-XX) 1 Mathematical logic and foundations (03-XX) 1 Combinatorics (05-XX) 1 Number theory (11-XX) 1 Commutative algebra (13-XX) 1 Statistics (62-XX) 1 Fluid mechanics (76-XX) 1 Quantum theory (81-XX) 1 Geophysics (86-XX) Citations by Year