The paper has done all-around study on the key technology of BDFM variable frequency system from theory to simulation and has established stability theoretical foundation for continue study work.
本文对无刷双馈电机变频调速系统的关键技术进行了较为全面的从理论到仿真的深入研究，为今后进一步的研究奠定了一定的理论基础。
The emphasis is on the theory and the type of Sparse Aperture Imaging System, study development in foreign country, key technology and the application in the future.
重点介绍了系统的成像原理和种类，国外的研究进展以及系统实现的关键技术和应用前景。
The technology mechanism and a key link of immunoassay for herbicide residue were introduced. The study progress on determination of herbicide residue by immunoassay was reviewed.
文章介绍了农药残留免疫分析技术的原理、关键技术环节，综述了国内外除草剂残留免疫测定的研究动态。
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