Even with math models and calculations, there will never be an "ideal string" because of the physical parameters inherent to the piano, Patin said.
甚至利用数学模型和计算工具，也将不会有“理想琴丝”，因为物理参数是钢琴固有的，巴丁说。
Upon the research on the whole electric power system, the robustness of fault diagnosis algorism is bad and it is hard to build practical math models for some objects.
在对整个电力系统进行故障诊断研究时，故障诊断算法的鲁棒性差且有些诊断对象不易于建立实际系统数学模型。
For achieving the dynamic simulation of air ABS, four math models whole vehicle model, single wheel model, tire model and arrester model were built in thesis.
为了实现气压abs的动态仿真，建立了汽车动力学的四个数学模型：整车模型、单轮模型、轮胎模型和制动器模型。
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