滑移线理论是解刚塑性平面应变间题的一种有效方法，而圆扇形场则是常使用的。
The theory of slip-line field is an effective method for problems of plane strain of perfect plastic solids, and the circle-fan field is used frequently.
基于此模型，推导了纳米线反磁化过程中不可逆磁化的临界场和矫顽力在一致转动和对称扇形模式下的表达式。
Based on this model, the expressions of critical field for the irreversible reversal magnetization and the coercive force are derived for both the parallel rotation and symmetric fanning mechanisms.
根据“均匀磁化”原理，用谐波分析的方法，分别对多体扇形及梯形磁体构成的两类环状系统的场形进行了分析。
According to the principle of the "uniform magnetization" and harmonic analytic method, the fields of the ring structure system with multi-segmented and trapezoidal magnet are analysed.
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