以瓦特六杆机构为例，在复数域内建立了以角度为变量的复数形式机构分叉分析方程。
Based on a case study of the Watt linkage, the bifurcation equation with Angle variables has been established in complex number field.
从矢量旋转的角度出发，来考察实信号的复数形式，特别是新的解析信号的构造问题。
Topics on construction of Complex representation, especially analytic signal of real signal are studied from the viewpoint of vector rotation.
本文提出了一种改进的指纹纹线方向场计算方法，其中重点分析了奇异点模型中旋转角度的估计方法，并在复数域内简化了纹线方向场的优化计算。
This paper introduces an improved algorithm for fingerprint direction field estimation, the rotation angle estimation during constructing the singular point models is analyzed in details.
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