首页> 外文期刊>Advances in decision sciences >On order5symplectic explicit Runge-Kutta Nystr?m methods
【24h】

On order5symplectic explicit Runge-Kutta Nystr?m methods

机译:关于阶5凸显式Runge-Kutta Nystr?m方法

获取原文
           

摘要

Order five symplectic explicit Runge-Kutta Nystr?m methods offive stages are known to exist. However, these methods do not havefree parameters with which to minimise the principal errorcoefficients. By adding one derivative evaluation per step, to giveeither a six-stage non-FSAL family or a seven-stage FSAL family ofmethods, two free parameters become available for the minimisation.This raises the possibility of improving the efficiency of order fivemethods despite the extra cost of taking a step.We perform a minimisation of the two families to obtain an optimalmethod and then compare its numerical performance with publishedmethods of orders four to seven. These comparisons along with thosebased on the principal error coefficients show the new method issignificantly more efficient than the five-stage, order five methods.The numerical comparisons also suggest the new methods can be moreefficient than published methods of other orders.
机译:已知存在五阶辛的显式Runge-Kutta Nystr?m方法冒犯阶段。但是,这些方法没有可用的参数来最小化主要误差系数。通过在每个步骤中添加一个导数评估,以给出六级非FSAL方法族或七级FSAL方法方法族,可以使用两个自由参数来最小化这,尽管存在额外的缺点,但仍可能提高五阶方法的效率我们对两个族进行最小化以获得最优方法,然后将其数值性能与已发布的四到七阶方法进行比较。这些比较以及基于主误差系数的比较表明,该新方法比五阶段五阶方法明显更有效。数值比较还表明,该新方法可能比其他阶数的已发布方法更有效。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号