fractals分形fractaln 不规则碎片形Fractal Brownian motion分形布朗运动fractal dimension space分维空间Fractal scheduling model分型生产调度模型fractal dimension vector分形维数向量fractal characterization分形表征fractal image primitives分形图元fractal Cantor muhilayer分形Cantor序列Fractal rough sea surface分形粗糙海面Fractal dimensions models分数维模型fractal wavelet dimension分形小波维数