Russia says it will send a permanent observer to the Organization of the Petroleum Exporting Countries, amid mounting concerns among producers about falling oil prices.

俄罗斯说，它将向石油输出国组织派遣一个常驻观察员。

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A new sensorless control method for AC permanent magnet linear servo motor using a sliding mode observer is proposed in this paper.

提出了一种采用滑模观测器的交流永磁直线伺服电机无传感器控制的新方法。

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A robust control scheme on the model of surface permanent magnet synchronous motor, composing of a sliding-mode controller and a sliding-mode observer, was presented in this paper.

基于表面式永磁同步电机在二相坐标下的数学模型，采用滑模变结构方法设计了由滑模控制器和扩展滑模观测器组成的鲁棒控制系统。

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Israel is responding to the United Nations General Assembly vote that granted the Palestinian Authority permanent observer status at the UN.

BBC: Israeli settlement move risks diplomatic fallout

Also making a statement was the Permanent Observer of the Holy See.

UN: General Assembly

Also delivering statements were the Permanent Observer of the African Union to the United Nations, and the Acting Head of the European Union Delegation to the United Nations.

UN: Security Council