Author: Ratko V Tomic
Date: 13:45:43 10/17/99
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Depth Tot.kN Delta.kN BF Time[s] Delta.T kN/s ----------------------------------------------------- 8 1044 .... .... 9.5 ... 110 9 2121 1123 4.70 18.5 9 115 10 5782 3661 4.53 47.75 29 121 11 15431 9649 4.31 124 76 124 12 62174 46743 4.36 495 371 125 ----------------------------------------------------- > Argh. I'm still not getting this for some reason. I see how ply 12 > is correct, but I don't see how the others are so high. Everything > I've tried gives between 2 and 3 for them. I added coliumn with time differences, which is what one would use in your method of computing branching factor. That still doesn't give 4.3-4.7 range for BF's. I guess it is much too inaccurate i.e. the additional time spent outside of the evaluation function (and its variations/noise) is relatively too large compared to the time inside evaluation for those shallower depths. The time ratio method is a rough substitute when you don't have node counts. But if you have node count N, then you can check that B^D gives you the right N (although you need more significant digits for B than shown in the table to get the exact numbers for Delta.kN, since B^D is very sensitive to small changes in B; this is like compund interest calculation - a small change in interest rate makes a big difference after 9-12 years of compounding), which is what BF definition (the equivalent uniform tree) specifies.
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