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Exact(17)
These transitions in the force accuracy and cost per step can clearly be seen in Figure 4.
At a more inclusive scale, the variation is between the two technologies, which differ in propulsive force, accuracy, and so forth.
The main goal of this study was avoid such extended tails of large force errors and to minimise the computational effort at a given force accuracy.
As mentioned previously the force accuracy requirement changes (most notably at around step 24) when much of the mass is in viralized dark matter halos.
Based on this we determine an opening radius for a cell, (mathit{RO} = b_{max}/theta), where θ is the traditional opening angle and the force accuracy controlling parameter in the code.
In Figure 4 we see that the gravity calculation time drops dramatically between step 0 and step 20 as structure forms and the effect of the initial condition grid is no longer relevant allowing the force accuracy to be relaxed.
Similar(43)
The critical question here is whether FMM can be tuned to be more efficient than direct summation at force accuracies and particle numbers required by collisional N-body techniques.
For the force accuracies required for cosmological simulations, better than 1percentt (Power et al. 2003; Reed et al. 2003), this higher order expansion is more efficient (Quinn et al. 2013).
Sometimes, though, and increasingly, they went perfectly home, and they have grown greatly since in range, force and accuracy.
At a tryout, he threw a pass with such force and accuracy that the coach said, "You are the quarterback".
With a wardrobe provided by the tennis club and the knowledge that she could belt a ball with more force and accuracy than just about any girl her age, she left her hometown for good.
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