Phase contrast imaging which is based on the wave character of neutron beam, is an advanced technique in neutron imaging field.

相衬成像是中子成像领域内的前沿技术，它的成像机理基于中子束的波动性。

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Theoretically, when gas exists in reservoir, longitudinal wave offset time will increase and transverse wave offset time will not change and density will decrease and neutron will decrease, too.

理论认为当储层中存在着天然气时，会导致纵波时差增大，横波时差不变，密度测井值减小，中子孔隙度减小。

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As the leader of the experimental gravity group at Columbia, he is looking into what happens when two black holes or neutron stars merge in the distant universe, and is collaborating with the Laser Interferometer Gravitational Wave Observatory, a facility funded by the National Science Foundation and located in Louisiana and Hanford, Wash. that aims to detect cosmic gravitational waves.

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These enormous emissions of energy occur when black holes, neutron stars or white dwarfs collide - the galactic mergers take just seconds, but they send out a vast wave of radiation.

BBC: Gamma-ray burst 'hit Earth in 8th Century'