1y

1

Change of lignin structure of wheat straw CMP before and after bleaching with X-P 1y and X-P 1y - P 2 sequences was studied .

对麦草化机浆经X-P1Y和X-P1Y-P2漂白前后浆中的木素结构进行了研究。
2

The results of research have shown : the stability of atomic time is better than pulsar time in the short time span , whereas , the stability of pulsar time is better than atomic time in the long time span ( e.g. : 1y ) .

研究表明，在较短时间跨度内，原子时稳定度好于脉冲星时，而在长时间尺度（如1年以上）上，脉冲星时间尺度稳定度好于原子时。