程序包 org.hipparchus.ode

类 ComplexODEConverter

java.lang.Object
org.hipparchus.ode.ComplexODEConverter
public class ComplexODEConverter extends Object
This class converts 复杂常微分方程 into 实数方程.

This class is a wrapper around a ComplexOrdinaryDifferentialEquation which allow to use a ODEIntegrator to integrate it.

The transformation is done by changing the n dimension state vector to a 2n dimension vector, where the even components are real parts and odd components are imaginary parts.

One should be aware that the data is duplicated during the transformation process and that for each call to computeDerivatives, this wrapper does copy 4n scalars : 2n before the call to computeDerivatives in order to dispatch the y state vector, and 2n after the call to gather zDot. Since the underlying problem by itself perhaps also needs to copy data and dispatch the arrays into domain objects, this has an impact on both memory and CPU usage. The only way to avoid this duplication is to perform the transformation at the problem level, i.e. to implement the problem as a first order one and then avoid using this class.

The proper way to use the converter is as follows:

   ODEIntegrator                       integrator       = ...build some integrator...;
   ComplexOrdinaryDifferentialEquation complexEquations = ...set up the complex problem...;
   ComplexODEState                     initialState     = ...set up initial state...;
   ComplexODEConverter                 converter        = new ComplexODEConverter();
   ComplexODEStateAndDerivative        finalstate       =
      converter.convertStateAndDerivative(integrator.integrate(converter.convertEquations(complexEquations),
                                                               converter.convertState(initialState),
                                                               t);

If there are 复杂次要方程, they must be converted too and both the converted primary equations and converted secondary equations must be combined together using ExpandableODE as usual for regular real equations.

从以下版本开始:
1.4
另请参阅:

  • 构造器详细资料

    • ComplexODEConverter

      public ComplexODEConverter()
      空构造函数。

      这个构造函数并非绝对必要，但它可以防止在JDK 18及更高版本中出现不必要的javadoc警告。

      从以下版本开始:
      3.0

  • 方法详细资料

    • convertEquations

      public OrdinaryDifferentialEquation convertEquations(ComplexOrdinaryDifferentialEquation equations)
      转换方程集。
      参数:
      equations - 要转换的方程
      返回:
      转换后的方程

    • convertSecondaryEquations

      public SecondaryODE convertSecondaryEquations(ComplexSecondaryODE equations)
      转换次要方程集。
      参数:
      equations - 要转换的方程
      返回:
      转换后的方程

    • convertState

      public ODEState convertState(ComplexODEState state)
      转换复杂状态（通常是初始状态）。
      参数:
      state - 要转换的状态
      返回:
      转换后的状态

    • convertState

      public ComplexODEStateAndDerivative convertState(ODEStateAndDerivative state)
      转换实数状态和导数（通常是最终状态或用于步骤处理或事件处理的某些中间状态）。
      参数:
      state - 要转换的状态
      返回:
      转换后的状态