In the structure, the (equal) integration area method was used to determine the control switch Angle, and the sinusoidal voltage wave was obtained by means of the concatenate superposition.

该结构利用积分面积相等的原则确定开关角，通过串级叠加的方法得到标准正弦波输出。

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And the question of how far Europe goes, the question of the area of integration, is an open question.

BBC: News | BREAKFAST WITH FROST | Interview with Lords Brittan & Lamont

We are aiming for binding rules to ensure strong fiscal and economic discipline in all countries, to go hand in hand with fiscal and economic integration -- not only discipline, but also integration in the euro area as a whole.

WHITEHOUSE: President Obama Speaks on US-EU Summit with Herman Van Rompuy and President Jos�� Manuel Barroso | The White House

Scientific cooperation within the sub-region and with the rest of Europe has been promoted to prepare countries for integration into the European Research Area (ERA).

UNESCO: Bosnia and Herzegovina to host discussions towards the elaboration of a roadmap of science priorities in South East Europe | United Nations Educational, Scientific and Cultural Organization