標題: Titlebook: Mathematical Aspects of Reacting and Diffusing Systems; Paul C. Fife Book 1979 Springer-Verlag Berlin Heidelberg 1979 Derivative.Diffusing [打印本頁] 作者: 短暫 時間: 2025-3-21 18:24
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作者: STYX 時間: 2025-3-21 23:10 作者: 擺動 時間: 2025-3-22 04:00
,Fisher’s Nonlinear Diffusion Equation and Selection-Migration Models,viduals may migrate geographically. In the case of deterministic models with space and time continuous, and selection restricted to a single locus with two alleles, the problem may sometimes be reduced to a single nonlinear diffusion equation. Such a reduction is advantageous, as it permits many qua作者: 背叛者 時間: 2025-3-22 06:47
Systems: Comparison Techniques,d in the previous chapter for the scalar equation. At the same time, certain other methods will be described, which were not discussed in that chapter. Our emphasis will be on the problem of obtaining existence of solutions of the types spoken of in Section 3.2, and of analyzing their stability char作者: 可互換 時間: 2025-3-22 11:03
Systems: Linear Stability Techniques,r change the character of a stable stationary state. As mentioned, similar results (Conway, Hoff, and Smoller 1978) state that if the spatial domain ii of the population is small enough, or if the diffusion coefficients are large enough, then the long-time behavior of solutions of the reaction-diffu作者: charisma 時間: 2025-3-22 15:12
Systems: Bifurcation Techniques, the equation. Then it is typically also the case that when the parameters assume values near the “transition” zone between stability and instability of the uniform solution, other nonuniform, but small amplitude, solutions exist as well. Sometimes they are stable, and thus represent new solutions t作者: EVICT 時間: 2025-3-22 18:01
References to Other Topics,s original state after a pulse traverses it. Signals propagating along a nerve axon are very successfully modeled by pulse solutions of the Hodgkin-Huxley (HH) or FitzHugh-Nagumo (FHN) systems of reaction-diffusion equations, and this, in fact, is the context within which almost all the work on reac作者: 思想 時間: 2025-3-23 00:28
refore, a lot of efforts have been spent on noise reduction technologies in relation to reducing sound exposure level. For sound sources having widely different acoustical properties, however, this relationship may no longer hold. For example, a sound may exist that has a SPL below the exposure stan作者: Ingredient 時間: 2025-3-23 02:37
Paul C. Fiferefore, a lot of efforts have been spent on noise reduction technologies in relation to reducing sound exposure level. For sound sources having widely different acoustical properties, however, this relationship may no longer hold. For example, a sound may exist that has a SPL below the exposure stan作者: 先行 時間: 2025-3-23 06:39 作者: 根除 時間: 2025-3-23 09:55 作者: Irascible 時間: 2025-3-23 15:27
Paul C. Fifend curation, which culminated in the founding of the Social and Economic Museum of Vienna and its mobile exhibitions in the 1920s. But until today, Neurath’s involvement in the organization of portable “field exhibitions,” which predated those at the Social and Economic Museum by at least half a dec作者: 格子架 時間: 2025-3-23 19:37 作者: GEST 時間: 2025-3-24 00:30 作者: 具體 時間: 2025-3-24 04:54 作者: DRILL 時間: 2025-3-24 10:27
Paul C. Fife logic in early works and subsequent positions. The specific attention to algebraic logic is important in integrating his own interest in mathematics and combining, since Leibniz, the ideals of a universal language and of a calculus of reasoning. The interest in universal languages constitutes a muc作者: tympanometry 時間: 2025-3-24 10:40
in politics of the day. The essay focuses on Neurath’s time in Revolutionary Bavaria and Red Vienna and analyzes his articles in two newspapers in the interwar period: the German periodical . (a supplement of the .) and the Austrian socialist daily .. The examination starts when Neurath definitely b作者: infinite 時間: 2025-3-24 18:01
Book 1979ists. These equations often take the form of systems of nonlinear parabolic partial d- ferential equations, or reaction-diffusion equations, when there is diffusion of chemical substances involved. A good overview of this endeavor can be had by re- ing the two volumes by R. Aris (1975), who himself 作者: 共同時代 時間: 2025-3-24 22:38
0341-633X ring theorists. These equations often take the form of systems of nonlinear parabolic partial d- ferential equations, or reaction-diffusion equations, when there is diffusion of chemical substances involved. A good overview of this endeavor can be had by re- ing the two volumes by R. Aris (1975), wh作者: 來就得意 時間: 2025-3-25 00:38 作者: installment 時間: 2025-3-25 04:06
Systems: Bifurcation Techniques,o which stability has been transferred from the uniform solution. This appearance of new solutions is considered a bifurcation phenomenon, because in parameter-amplitude diagrams, new solutions branch off the known uniform solution at critical values of the parameters.作者: 皮薩 時間: 2025-3-25 11:15
References to Other Topics,tion-diffusion pulses has been performed. Excellent reviews of this work are available (Rinzel 1978a; Scott 1975, 1977; Hastings 1975; Troy 1978a; H. Cohen 1971), and so my comments here will be very brief.作者: MUT 時間: 2025-3-25 12:34 作者: sigmoid-colon 時間: 2025-3-25 16:04 作者: 揉雜 時間: 2025-3-25 20:19
Paul C. Fife anderen Lehrbuch der Neuraltherapie, die diagnostische und therapeutische Arbeit des Arztes konsequent und durchg?ngig auf ein hervorragend dargestelltes neurophysiologisches Konzept bezogen. Besonders die Einführung in die Neurophysiologie ist bestens gelungen, sie verbindet die Ende der 50er Jahre bekannte978-3-211-82012-4978-3-7091-7898-0作者: DNR215 時間: 2025-3-26 00:55 作者: 激怒 時間: 2025-3-26 07:15
Paul C. Fifeng abstract graphic information with commonplace objects, they invited inhabitants into a conversation about the material world as well as the future by drawing on personal experience. As such, these field exhibitions created a communal environment for viewing and debating information and championed作者: 鍵琴 時間: 2025-3-26 09:24 作者: 匯總 時間: 2025-3-26 13:48 作者: 蒸發(fā) 時間: 2025-3-26 18:22 作者: 廚師 時間: 2025-3-26 22:29 作者: JEER 時間: 2025-3-27 04:39
n of his role and his self-image was a common theme in many of these articles. Beyond that, however, there were even approaches to closely related themes that he developed more precisely only in his later life: the question of experts, citizens, and democracy.作者: 背信 時間: 2025-3-27 05:47
,Fisher’s Nonlinear Diffusion Equation and Selection-Migration Models,these equations in recent years. This chapter is concerned with the justification for the use of single diffusion equations in modeling selection- migration phenomena. We begin with an overview of arguments which have been used in the past to model the problem by a single equation. We shall then app作者: 赦免 時間: 2025-3-27 13:15
Book 1979ffuse. Other analogies are less obvious; for example, the electric potential of a membrane can diffuse like a chemical, and of course can interact with real chemical species (ions) which are transported through the membrane. These facts gave rise to Hodgkin‘s and Huxley‘s celebrated model for the pr作者: 征服 時間: 2025-3-27 17:30 作者: infinite 時間: 2025-3-27 20:05
0341-633X teract with real chemical species (ions) which are transported through the membrane. These facts gave rise to Hodgkin‘s and Huxley‘s celebrated model for the pr978-3-540-09117-2978-3-642-93111-6Series ISSN 0341-633X Series E-ISSN 2196-9981 作者: degradation 時間: 2025-3-28 00:46 作者: 蜿蜒而流 時間: 2025-3-28 02:16 作者: 搜集 時間: 2025-3-28 07:36
Modeling Considerations,iduals (or eliminate individuals), and also move about in some random manner. The use of these equations is rightly subject to dispute in many cases, and so it is appropriate that we spend some effort in attempting to elucidate the assumptions on which they are based in population dynamical contexts.作者: 拱形大橋 時間: 2025-3-28 12:03 作者: 沙漠 時間: 2025-3-28 17:50
Systems: Linear Stability Techniques,r change the character of a stable stationary state. As mentioned, similar results (Conway, Hoff, and Smoller 1978) state that if the spatial domain ii of the population is small enough, or if the diffusion coefficients are large enough, then the long-time behavior of solutions of the reaction-diffusion system
