Concepts such as matching, renormalization, the operator product expansion, power counting, and running with the renormalization group will be discussed.

我们将讨论诸如匹配，重整化，算符乘积展开，幂次计数，和重整化群跑动等概念。

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The ideal spectrum of the antenna is presented by using the data measured and the error operator with the Taylor series expansion.

运用泰勒级数展开，可将天线理想波谱表示为误差算子和近场测量数据的形式。

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Airport operator, London Luton Airport Operations Limited said the expansion would be carried out in three phases within the existing boundary up until 2028.

BBC: Say No to Luton Expansion

It represented an expansion of services, not an expansion of the airport, said a spokesman for airport owner and operator Marshall.

BBC: Cambridge Airport Europe business routes announced