commutation

n.

交换；折算；折合；减刑

commutation system交换系统

1. Commutation is distinct from reprieve.
   减刑不同于缓刑。
2. He appealed for (a) commutation of the death sentence to life imprisonment.
   他已上诉请求将死刑减为无期徒刑。
3. Commutation failures are one of the common faults in HVDC systems.
   换相失败是直流系统的最常见故障之一。

Applications of a Commutation Formula
Commutation failures in HVDC transmission systems. Discussion
Kinematic design and commutation of a spherical stepper motor
3-phase electronic tap changer commutation and device
Problèmes combinatoires de commutation et réarrangements
A novel matrix converter topology with simple commutation
A Novel Matrix Converter Topology with Simple Commutation
Analysis of torque ripple due to phase commutation in brushless DCmachines
Analysis of torque ripple due to phase commutation in brushless DC machines
Probing Quantum Commutation Rules by Addition and Subtraction of Single Photons to/from a Light Field