After introducing fractal theory and its foundation,the feasibility and advantages of fractal analysis for surface characterization were presented. The calculation and physical properties of fractal dimension D and amplitude coefficient C were also presented.
本文首先介绍了分形理论及其数学基础，指出了用分形方法来描述机加工表面的可行性和优越性，并重点阐述了分形维数和尺度系数的计算方法及其各自的物理意义。
参考来源 - 机械加工表面的性能评价·2,447,543篇论文数据，部分数据来源于NoteExpress
Based on the above, the impact of amplitude coefficient ratio on amplitude-phase Double Differential Space-Time Codes is discussed, and an optimal selection scheme in amplitude coefficient is given.
在此基础上，讨论了幅度系数比对幅度相位双差分空时码的影响，并给出了一种最佳的幅度系数选择方案。
Amplitude modulation coefficient is a parameter, by which the capacity of internal force redistribution in continuous composite beams is reflected.
弯矩调幅系数是反映连续组合梁内力重分布能力的参数。
Specifically, the convergence rate of coefficient estimate is obtained in constant amplitude case.
特别地，对于常数振幅情形，得到了多项式系数估计的强收敛速度。
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