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We study the phenomena of self-organized criticality originally proposed by Bak, Tang, and Wiesenfeld. A continuous-energy model is introduced. Using numerical simulations, we find that energy is homogeneously and isotropically distributed in space, and that it is concentrated around discrete values. We propose a scaling theory to estimate the various exponents. The activation cluster size distribution is found to be D (s) 1/s^, =2-2/d; and the dispersion relation tr^z, z= (d+2) /3.
Yicheng Zhang (Mon,) studied this question.