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词汇 Adjoint equation
分类 英语词汇 英语翻译词典
释义

Adjoint equation

英语百科

Adjoint equation

An adjoint equation is a linear differential equation, usually derived from its primal equation using integration by parts. Gradient values with respect to a particular quantity of interest can be efficiently calculated by solving the adjoint equation. Methods based on solution of adjoint equations are used in wing shape optimization, fluid flow control and uncertainty quantification. For example  dX_t = a(X_t)dt + b(X_t)dW this is an Itō stochastic differential equation. Now by using Euler scheme, we integrate the parts of this equation and get another equation,  X_{n+1} = X_n  +  a \Delta t + \zeta b \sqrt{\Delta t}, here \zeta is a random variable, later one is an adjoint equation.

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