However, being lake of accurate theoretical criterions for cold ring rolling mill design, the hypothesis-based energetic parameters and kinematic parameters have deviation to the actual operation performance, the adaptability to the changes of material characteristics and ring dimension are also need to be improved. 然而,目前辗环机工作参数的设计缺乏精确的理论指导,基于假设建立的轧制力能关系和运动关系与设备实际运行情况出入较大,对于材料特性与环件尺寸的变化更是难以适从。
For the accurate model, we firstly compute the wide-band RCS curve, then use multiple frequency-point imaging method to get the one dimension range profile, lastly adopt accurate imaging model to generate SAR simulation image. 采用精确模型时,首先计算目标在各方位角上的宽带RCS曲线,而后利用各频率点计算结果获得目标的一维距离像,最后采用精确成像算法生成SAR仿真图像。