In the sensorless control system, a specified high frequency signal is injected in to trace the magnetic anisotropy of the motor, by which we can get the value of rotor speed and position.
研究采用高频注入法的无传感器直接转矩控制系统，通过注入特定的高频信号来追踪电机转子的空间凸极效应，以此得到转子位置和速度值。
Use magnetic resonance imaging diffusion tensor data and three dimension tracing technique to trace brain white matter fiber tracks in this paper.
目的：使用磁共振弥散张量成像和示踪技术进行三维脑白质纤维束示踪成像。
The results showed that MLDH and product MLDH-FU belonged principally to a six square crystal series (R-space group), were magnetic compound crystal phase mixed trace iron oxide.
结果表明，MLDH及离子交换产物MLDH-FU是以六方晶系为主、混杂微量氧化铁的磁性复合晶相；
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