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Shasha Wang,Daniel Safarik,Zhendong Wang Council on Tall Building and Urban Habitat Korea 2023 International journal of high-rise buildings Vol.12 No.1
The last 30 years have seen a rapid growth in the number of supertall buildings across the world, with newly completed buildings continuing to rank among the tallest 100 every year. Chinese projects notably play a pivotal role in these constant updates. It is caused by the interweaving of population and urbanization, economic considerations, and further, a series of accompanying urban problems. This paper focuses on the world's 100 tallest buildings in the last 30 years, and compares this collection of projects across five years via the dimensions of height, distribution, function and structural material. The intention is to discuss and interpret the influence factors and developing trends, some of which have been apparent over a dozen years, while others are just beginning to take shape, thus to provide an opportunity to preview the types of supertall buildings in the future.
Yulong Tuo,ShashaWang,Chen Guo,Haomiao Yu,Zhipeng Shen 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.2
In this paper, an event driven backstepping positioning controller based on the structural reliability is developed for a turret-moored floating production storage and offloading (FPSO) vessel with unknown slow timevarying disturbances. The mathematical model of the FPSO vessel is given at first. Secondly, to make full use of the positioning capability of mooring system while ensuring the safety of mooring lines, a continuous backstepping positioning controller is designed based on the structural reliability of the mooring system; in the meanwhile, a disturbance observer is designed to handle the unknown disturbances. Then, the proposed event driven positioning controller is achieved based on the designed continuous controller by designing suitable event driven conditions, which can determine the updated time instants of the event driven positioning controller. The proposed positioning controller can not only guarantee the uniform ultimate boundness of the errors for structural reliability and heading but also ensure that no Zeno behavior occurs. Finally, the simulations demonstrate that the proposed event driven positioning controller’s performance while reducing the execution times of FPSO vessel’s actuators.