It is urgent to detect the harmonic components and the negative sequence components of current accurately and to evaluate the quality of electric energy correctly.

准确检测这些电流分量，正确评价用户电能质量的好坏，已经是非常迫切的问题。

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MCG can detect displacement of ST-segment caused by electric current due to ischemic myocardial injury and is helpful in early diagnosis of coronary heart disease.

MCG可以检测心肌缺血损伤电流造成的ST段基线位移，有利于早期诊断冠心病。

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Cellphones, for instance, rely on chips to detect battery levels and coordinate responses, such as shutting off the electric current when full.

FORBES: Smarter Phone Charger On Way