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Algebraic Analysis Approach for Multibody Problems II

机译:多体问题的代数分析方法II

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The algebraic model (ALG) proposed by the authors has sufficiently high accuracy in calculating the motion of a test particle with all the field particles at rest. When all the field particles are moving, however, the ALG has relatively poor prediction ability on the motion of the test particle initially at rest. None the less, the ALG approximation gives a good results for the statistical quantities, such as variance of velocity changes or the scattering cross section, for a sufficiently large number of Monte Carlo trials. For a 108-body problem, which corresponds to full three-dimensional Coulomb interactions within the Debye sphere in a fusion plasma, the ALG approximation is 263 times as fast as the 6-stage 5-th order Runge-Kutta-Fehlberg method with an absolute error tolerance of 10?16.
机译:作者提出的代数模型(ALG)在计算所有场粒子处于静止状态的测试粒子的运动时具有足够高的精度。但是,当所有场粒子移动时,ALG对最初静止的测试粒子的运动具有相对较差的预测能力。尽管如此,对于足够多的蒙特卡洛试验,ALG近似对于统计量(例如速度变化的方差或散射截面)给出了很好的结果。对于10 8 体问题,其对应于聚变等离子体中Debye球内的完整三维库仑相互作用,ALG近似速度是6级5阶速度的263倍Runge-Kutta-Fehlberg方法的绝对误差容限为10 ?16

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