天然气已经成为我国主要的清洁能源之一,其运输和储存存在着一定的安全风险,管道的安全监测技术研究便成为了一个迫切需要解决的问题。本文提出了基于光纤激光器管内声压传感的管道泄漏监测技术,设计了适应于天然气管道检测的光纤激光...天然气已经成为我国主要的清洁能源之一,其运输和储存存在着一定的安全风险,管道的安全监测技术研究便成为了一个迫切需要解决的问题。本文提出了基于光纤激光器管内声压传感的管道泄漏监测技术,设计了适应于天然气管道检测的光纤激光声波传感器。采用液柱声场实验验证了8000 Hz以下范围内,光纤激光器管内声波传感器的灵敏度约为80 dB re pm/MPa,并设计了管道泄漏实验,采用次声波频谱能量法不仅实现了管道泄漏监测,而且完成了2种不同孔径泄漏量的识别。展开更多
We investigate the influence of reagent vibration on the stereodynamics of the title reaction by the quasi-classmal trajectory on the Aguado-Paniagua2-potential energy surface developed by Aguado et al. （J. Chem. Phy...We investigate the influence of reagent vibration on the stereodynamics of the title reaction by the quasi-classmal trajectory on the Aguado-Paniagua2-potential energy surface developed by Aguado et al. （J. Chem. Phys. 1997 106 1013）. The cross sections and reaction probability as functions of the reagent vibration are calculated in the centre-of- mass frame. The product angular distributions of p（Фr）, p（Фr）, and p（Фr, Фr）, which reflect the vector correlation, are also presented and discussed. The results indicate that the vector properties are sensitively affected by the vibrational excitation.展开更多
文摘天然气已经成为我国主要的清洁能源之一,其运输和储存存在着一定的安全风险,管道的安全监测技术研究便成为了一个迫切需要解决的问题。本文提出了基于光纤激光器管内声压传感的管道泄漏监测技术,设计了适应于天然气管道检测的光纤激光声波传感器。采用液柱声场实验验证了8000 Hz以下范围内,光纤激光器管内声波传感器的灵敏度约为80 dB re pm/MPa,并设计了管道泄漏实验,采用次声波频谱能量法不仅实现了管道泄漏监测,而且完成了2种不同孔径泄漏量的识别。
基金Project supported by Jilin University,China(Grant No.419080106440)the Chinese National Fusion Project for ITER(Grant No.2010GB104003)the National Natural Science Foundation of China(Grant No.10974069)
文摘We investigate the influence of reagent vibration on the stereodynamics of the title reaction by the quasi-classmal trajectory on the Aguado-Paniagua2-potential energy surface developed by Aguado et al. （J. Chem. Phys. 1997 106 1013）. The cross sections and reaction probability as functions of the reagent vibration are calculated in the centre-of- mass frame. The product angular distributions of p（Фr）, p（Фr）, and p（Фr, Фr）, which reflect the vector correlation, are also presented and discussed. The results indicate that the vector properties are sensitively affected by the vibrational excitation.
