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The double-deck pavement of the long-span cable-stayed bridge was set as the research object, by setting the load position, load condition and reference point on the bridge deck, the parametric analysis of the elastic modulus, thickness and temperature of the pavement material was performed. Then Pavement structure parameters suitable for the bridge were get. The finite element software was used to simulate the pavement effect of the No. 1 bridge of Haidong Avenue under the actual load, which provided reasonable optimization measures for the construction method of large-span steel bridge deck pavement in high and cold areas.

Abstract. After more than 15 years of rapid development, the third party payment institutions have become an important supplement to the service market in China. It has been innovated in terms of payment channels and payment tools. It has satisfied the needs of the majority of enterprises and individuals in terms of convenience, real-time and credit guarantee. Thus, it achieved rapid development. In addition, it has changed not only the traditional production mode, but also the consumers' traditional payment habit. And it has become a new growth point of the world economy. This paper will analyze the current situation of the development of third party payment platform in China, and make a comparative analysis of the third party payment between China and the United States, to explore the development trends for third party payment platform in three aspects of supervision, biometrics technologies, and financial technology. At last, some suggestions will be put forward on China third party payment platform to further improve.