The study on shunt active power filter, which is a novel device compensating harmonics and reactive power current simultaneously, is the focus in the field of power quality control.

并联有源电力滤波器作为一种新型的谐波、无功综合补偿系统，是电能质量控制领域中的研究热点。

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A long field running of the medium-frequency power supply shows that the control system presented in this paper greatly improves its stability and quality.

长期的现场运行表明，这一控制系统大大提高了电源的可靠性及中频电源产品质量。

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Beijing this year will be to strengthen the supervision of the circulation area of food safety, focusing on a comprehensive field of product quality to enhance the flow of control.

北京今年将以加强流通领域食品安全监管为重点，全面增强流通领域商品质量控制能力。

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Especially when used with large aperture lenses, the EOS 6D camera's full-frame sensor offers a tremendous degree of creative control over depth-of-field, helping users to achieve pro-quality cinematic effects in Full HD video recordings.

ENGADGET: Canon unveils EOS 6D DSLR: full frame sensor and WiFi for $2,099 in December