The conclusion is that the theoretical foundation of commutative hyper-operator method is Lie algebra.

结论是交换超算符方法的理论基础是李代数。

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The iterative time reversal processing and the decomposition time reversal operator method are studied.

研究了迭代时反处理和时反算子分解方法。

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With displacement operator method the total quantum noise is obtained, and a quantum channel model with attenuation and noise is proposed.

用位移算符方法计算量子噪声的累加，同时建立了有衰减和噪声时的信道的量子模型。

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They know that retail merchants will not adopt a new payment method that only works with the subscribers of just one mobile operator and therefore excludes maybe three out of four customers in their store.

FORBES: Mobile Payments: What's Taking So Long?

Direct Operator Billing from MACH will enable Skype to bring a vital alternative payment method to these channels: Skype users will be able to charge their Skype credit to their mobile phone bill or pre-paid account, and enjoy the frictionless user experience gained from this payment method.

ENGADGET: Skype strikes deal with Mach to expand direct carrier billing for credit purchases