arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.4608math.OC
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非线性微分方程光滑逼近的矩和SDP松弛技术

Moment and SDP relaxation techniques for smooth approximations of problems involving nonlinear differential equations

Martin Mevissen, Jean-Bernard Lasserre, Didier Henrion

摘要:

结合最近矩和稀疏半定规划(SDP)松弛技术,我们提出了一种方法来寻找光滑的近似解的非线性微分方程。给出了一个非线性微分方程系统,我们应用基于有限差分和稀疏SDP松弛多项式最优化问题(POP)的技术,以获得其解的离散逼近。在第二步中,我们应用最大熵估值(使用与离散解相关的Borel测度的矩)来获得光滑的封闭形式近似。该方法是说明各种线性和非线性常微分方程(ODE),偏微分方程(PDE)和最优控制问题(OCP),并初步的数值结果报告。

英文摘要:

Combining recent moment and sparse semidefinite programming (SDP) relaxation techniques, we propose an approach to find smooth approximations for solutions of problems involving nonlinear differential equations. Given a system of nonlinear differential equations, we apply a technique based on finite differences and sparse SDP relaxations for polynomial optimization problems (POP) to obtain a discrete approximation of its solution. In a second step we apply maximum entropy estimation (using moments of a Borel measure associated with the discrete solution) to obtain a smooth closed-form approximation. The approach is illustrated on a variety of linear and nonlinear ordinary differential equations (ODE), partial differential equations (PDE) and optimal control problems (OCP), and preliminary numerical results are reported.

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