Dynamic focus voltage error of projection display system was studied in this article. Parabola dynamic focus method, projection tube shape and optics processing were analyzed.
This paper analyses parabola precision of a cableway of single span, and discusses rise Angle while the load is in motion and puts new method of algorithm for rise Angle.
分析了单跨索道的抛物线算法，讨论了荷重运行时的升角，并提出了新的升角计算方法。
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A kind ofparabola interpolation method with numerical control periodic increment is introduced.