Found 63 Documents (Results 1–63)
Discontinuous Galerkin approximations to elliptic and parabolic problems with a Dirac line source. (English) Zbl 1514.65135
A sequential discontinuous Galerkin method for two-phase flow in deformable porous media. (English) Zbl 1507.76122
On the transition from thermoacoustic convection to diffusion in a near-critical fluid. (English) Zbl 1197.80026
MSC:
80A20
76Q05
The existence of limit cycles for a Kolmogorov cubic system with a quartic curve solution. (Chinese. English summary) Zbl 1174.34382
Notable physical anomalies manifested in non-Fourier heat conduction under the dual-phase-lag model. (English) Zbl 1140.80368
MSC:
80A20
35Q72
Comparison of MLP neural network and Kalman filter for localization in wireless sensor networks. (English) Zbl 1157.68313
Zheng, S. Q. (ed.), Parallel and distributed computing systems. Proceedings of the 19th IASTED international conference (PDCS 2007), Cambridge, MA, USA, November 19–21, 2007. Calgary: International Association of Science and Technology for Development (IASTED); Anaheim, CA: Acta Press (ISBN 978-0-88986-704-8/CD-ROM). 323-330 (2007).
A theorem of the zero points of the Abel integral. (Chinese. English summary) Zbl 1121.34318
Limit cycles for a cubic Kolmogorov system with a class of cubic solutions. (Chinese. English summary) Zbl 1130.34310
Hopf bifurcation of a class of epidemic mathematical models. (Chinese. English summary) Zbl 1098.92059
Poincaré bifurcation for quadratic system with a bound of hyperbola and a single center. (Chinese. English summary) Zbl 1093.34523
The existence of limit cycles for a Kolmogorov cubic system with a class of cubic curve solution. (Chinese. English summary) Zbl 1127.34319
Existence of limit cycles for a quadratic system with a class of cubic curves solution. (Chinese. English summary) Zbl 1085.34520
MSC:
34C05
Study on the Poincaré bifurcation of a quadratic system with two centers and two unbounded heteroclinic loops once again. (Chinese. English summary) Zbl 1067.34042
A global properties of a type II functional response predator-prey system. (Chinese. English summary) Zbl 1067.34051
Existence of limit cycles for a cubic Kolmogorov system with a parabolic solution which does not contact and intersect the coordinate axes. (English) Zbl 1065.34023
Reviewer: Alexander Grin (Grodno)
A necessary and sufficient condition for the coexistence of a class of cubic curve separatrix cycles and limit cycles to the cubic system. (English) Zbl 1070.34047
Reviewer: Iliya Iliev (Sofia)
A method for studying complex two-dimesional autonomous differential systems. I. (Chinese. English summary) Zbl 1055.34062
On quadratic system with a two-fold parabola solution. (Chinese. English summary) Zbl 1022.34030
Reviewer: Klaus R.Schneider (Berlin)
MSC:
34C05
The analysis of topological structure of two-dimensional Volterra system of prey-predator model with a constant harvest rate or constant invest rate. (Chinese. English summary) Zbl 1106.92315
A type of anorexia system of the prey species with density dependence. (Chinese. English summary) Zbl 1039.92039
A sufficient and necessary condition for the existence of a double bun type separatrix cycle for axial symmetry cubic systems. (English) Zbl 1003.34035
Reviewer: Armengol Gasull (Bellaterra, Barcelona)
The economic catching model of a type of population. (Chinese. English summary) Zbl 1056.34510
MSC:
34C60
A class of plant-herbivore systems in which plant species possess a constant harvest rate. (Chinese. English summary) Zbl 1059.92510
MSC:
92D40
A note on the article: “Qualitative analysis of a predator-prey system with functional response function \(\sqrt x\)” by J. Ouyang and D. Q. Yang. (Chinese. English summary) Zbl 1059.92507
MSC:
92D25
Existence of limit cycles for a cubic Kolmogorov system with a hyperbolic solution. (English) Zbl 1024.34025
A necessary and sufficient condition for the existence of quadrilateral hyperbolic separatrix cycles to the cubic system \(E_3^1\). (Chinese. English summary) Zbl 0990.34043
A necessary and sufficient condition for the existence of two angle hyperbolic separatrix cycles for the cubic system \(E_3^1\). (Chinese. English summary) Zbl 0990.34044
A class of functional response predator-prey systems in which the predator species has a constant harvesting rate. (Chinese. English summary) Zbl 0970.92508
MSC:
92D25
A necessary and sufficient condition for the existence of algebraic separatrix cycles for a cubic system \(E^1_3\) with a parabolic solution. (Chinese. English summary) Zbl 0964.34037
A predator-prey system with scanty effect of which the prey species possesses a constant invest. (Chinese. English summary) Zbl 0957.34030
A Poincaré bifurcation for the quadratic system with a triangular periodic region. (Chinese. English summary) Zbl 0953.34027
A class of predator-prey systems under a sparse effect which possess a density dependence of the predator species. (English) Zbl 0959.92022
The qualitative analysis of an autocatalytic reaction model. (English) Zbl 0990.34031
Reviewer: Gyula Farkas (Gyor)
An anorexia type system of the predatory species with density dependence. (Chinese. English summary) Zbl 0957.34029
An approximating system for a differential system with a multiple limit cycle. (Chinese. English summary) Zbl 0976.34030
The problem of existence of limit cycles for the central symmetric cubic system with cubic curve solution. (Chinese. English summary) Zbl 0932.34026
Reviewer: Ye Yanqian (Nanjing)
The existence of limit cycles for a cubic system with a central symmetry described by \(xy^2 + y = x^3\). (Chinese. English summary) Zbl 0928.34026
An approximate system for a polynomial differential system with a high degree separatrix cycle. (Chinese. English summary) Zbl 0958.37004
Poincaré components of quadratic systems on periodic annular domains bounded by hyperbolas and equatorial arcs and their applications. (Chinese) Zbl 0938.34021
Reviewer: Ye Yanqian (Nanjing)
A condition for the existence of limit cycles of a centrally symmetric cubic system with two parabolic solutions. (Chinese. English summary) Zbl 0933.34021
Reviewer: Wang Cun-Zheng (Chengdu)
A necessary and sufficient condition for a cubic system to have a class of double folium separatrix cycles. (Chinese. English summary) Zbl 1083.34517
MSC:
34C05
A qualitative analysis for III type functional response model of the predatory species with density dependence. (Chinese. English summary) Zbl 0893.92032
A sufficient and necessary condition of the existence of limit cycles in the \(III_{a=0}\) (\(-1<n<0\), \(0<l<1\)) type quadratic system. (Chinese. English summary) Zbl 0865.34021
MSC:
34C05
A problem of Poincaré bifurcation theory in a quadratic system with two semi-equator arc separatrix cycles and two centres. (English) Zbl 0837.34040
Reviewer: Ye Yanqian (Nanjing)
A necessary and sufficient condition for the existence of a hyperbolic separatrix cycle of a centrally symmetric cubic system. (Chinese) Zbl 0949.34504
A necessary and sufficient condition for the existence of a class of quartic curve separatrix cycles in a quadratic system. (Chinese. English summary) Zbl 0883.34053
MSC:
34C37
Examples of the determination of bounded separatrix cycles in quadratic systems. (Chinese) Zbl 1538.34162
MSC:
34C37
The phase portrait analysis of three species Volterra model with the rates of constant harvest and constant invest. (Chinese. English summary) Zbl 0779.92014
Topological classification of the trajectories of Kolmogorov cubic system \(E^ 2_ 3\) with elliptic solution which contact both the axes. (English) Zbl 0776.34025
Reviewer: J.Andres (Olomouc)
MSC:
34C05
Infinite separatrix cycle in the critical case of a quadratic differential system. (English) Zbl 0943.34504
Liao, Shantao (ed.) et al., Dynamical systems. Proceedings of the special program on dynamical systems and ordinary differential equations, Tianjin, China, September 1990-June 1991. Singapore: World Scientific. Nankai Ser. Pure Appl. Math. Theor. Phys. 4, 278-296 (1993).
MSC:
34C05
Distinguish problem for some type critical cycle on quadratic system. (English) Zbl 0754.34021
Reviewer: Ye Yanqian (Nanjing)
MSC:
34C05
Elliptic separatrix cycles of a quadratic differential system. (Chinese. English summary) Zbl 0759.34026
The problem on the existence of cubic curve limit cycle and cubic curve separatrix cycle in quadratic system. (Chinese) Zbl 0754.34022
Reviewer: Ye Yanqian (Nanjing)
MSC:
34C05
Uniqueness of limit cycles of a class of quadratic systems. (Chinese. English summary) Zbl 0746.34024
J. Dalian Univ. Technol. 31, No. 6, 725-728,737 (1991).
MSC:
34C05
Phase-portrait discussion about a quadratic differential system with a variation of a parameter as saddle-node appear saddle-node. (English) Zbl 0745.34023
Reviewer: N.L.Maria (Turlock)
MSC:
34C05
A necessary and sufficient condition for the existence of parabolic separatrix cycles in a quadratic system. (Chinese. English summary) Zbl 0773.34026
A sufficient and necessary condition of the existence of quartic curve limit cycles and separatrix cycle in a certain quadratic system. (English) Zbl 0744.34034
Reviewer: Ye Yanqian (Nanjing)
MSC:
34C05
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