This paper focused on the problems of the codebook formation, feature extraction and the noise robustness, and experiments proved that the results obtained were good.

本文对文本无关说话人识别系统中的码本设计、特征参数提取以及鲁棒性等方面进行了研究，取得了一些研究成果。

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The paper discusses the cause of formation, feature and harm of Xinjiang coal-field fire accident.

论述了新疆煤田火灾的成因、特点及产生的危害。

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One unpredictable feature of Parinacota is the snow formation known as penitentes, thin, icy spires that can grow several metres tall and can make progress difficult, or even impossible by blocking the usual climbing routes.

BBC: How to climb a South American volcano

Large air shows like those feature pilots pulling seemingly death-defying maneuvers in all manner of aircraft from biplanes to jets, precision formation flying, skydivers jumping from planes and, of course, screeching military jets pulling high-G maneuvers.

WSJ: Dark clouds hang over air shows after budget cuts