Since the first observation of gravitational waves GW150914 was announced by the LIGO and Virgo collaborations on 11 February 2016, which was made on 14 September 2015, scientific research and observation of gravitational wave have received more and more attention. The paper analyzes the aspects of overall situation, high-frequency keywords and highly cited papers about SCI papers in gravitational waves. The paper aims to understand the international development trend in the field of gravitational waves.

The marine bionic robot is obtained by studying the construction principles and functions of certain marine organisms and imitating them in engineering technology. Massachusetts Institute of Technology's imitation tuna structure has successfully developed the world's first true robot fish, which further pushed on the study and development in marine bionics. Plans and projects on underwater robots or robotic fish have been made to support the development of this field in many countries. This paper investigates the development status of marine bionic robots, plans and support projects in major countries. And then the amount of funding in this field is analyzed. Subsequently, bibliometrics is used to analyze the research literatures of global marine bionic robots. The correlation analysis between supporting projects and output literature is carried out. Finally, the main research cases in marine bionics or robot fishes are summarized. Through the panoramic analysis of this article, some suggestions for China's development in this field are provided.