Mathematical Models: Mechanical Vibrations, Population Dynamics, and Traffic Flow : an Introduction to Applied Mathematics |
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Page 98
... show that the isocline itself is a solution curve . 26.2 . Consider a linear oscillator with linear friction : m d2x dt2 dx + cdt + kx = 0 . ( a ) Show that E = m / 2 ( dx / dt ) 2 + ( k / 2 ) x2 is a decreasing function of time . ( b ) ...
... show that the isocline itself is a solution curve . 26.2 . Consider a linear oscillator with linear friction : m d2x dt2 dx + cdt + kx = 0 . ( a ) Show that E = m / 2 ( dx / dt ) 2 + ( k / 2 ) x2 is a decreasing function of time . ( b ) ...
Page 161
... Show how both parts ( b ) and ( c ) illustrate the following behavior : ( i ) If No > ẞ / a , then N → ∞o . ( At what time does N ( ii ) If N。< ß / α , then N → 0 . ( iii ) What happens if No ― B / α ? → ∞ ? ) 39.2 . The general ...
... Show how both parts ( b ) and ( c ) illustrate the following behavior : ( i ) If No > ẞ / a , then N → ∞o . ( At what time does N ( ii ) If N。< ß / α , then N → 0 . ( iii ) What happens if No ― B / α ? → ∞ ? ) 39.2 . The general ...
Page 183
... show that the population oscillates around its equilibrium population with decreasing amplitude . What is the approximate " period " of this decaying oscillation ? ( d ) Show that zero population is an unstable equilibrium population . Show ...
... show that the population oscillates around its equilibrium population with decreasing amplitude . What is the approximate " period " of this decaying oscillation ? ( d ) Show that zero population is an unstable equilibrium population . Show ...
Contents
Mechanical Vibrations 1 | 3 |
NEWTONS LAW | 4 |
AS APPLIED TO A SPRINGMASS SYSTEM | 6 |
Copyright | |
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Mathematical Models: Mechanical Vibrations, Population Dynamics, and Traffic ... Richard Haberman No preview available - 1998 |
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amplitude applied approximation Assume calculated called cars characteristics conservation Consider constant continuous corresponding curve decreases density wave depends derived described determine differential equation discussed distance dx dt dx/dt energy equal equilibrium population equilibrium position equivalent example exercise expression Figure force formula friction function given growth rate hence highway illustrated increases indicate initial conditions integral intersect isoclines known length light limit linear manner mass mathematical model maximum measured method motion moving nonlinear number of cars observer obtained occurs oscillation partial differential equation pendulum period phase plane Pmax possible problem region result road satisfies shock Show shown in Fig simple sketched sketched in Fig slope solution solve species spring spring-mass system stable straight line Suppose tion traffic density traffic flow trajectories Umax unstable valid variables yields zero