Dynamic Analysis of Subsea Sediment Engineering Properties Based on Long-Term In Situ Observations in the Offshore Area of Qingdao DOI Creative Commons
Zhiwen Sun, Yanlong Li, Nengyou Wu

et al.

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(4), P. 723 - 723

Published: April 4, 2025

The drastic changes in the marine environment can induce instability of seabed sediments, threatening safety engineering facilities such as offshore oil platforms, pipelines, and submarine optical cables. Due to lack long-term situ observation equipment for properties most existing studies have focused on phenomena erosion suspension boundary layer wave-induced liquefaction, leading insufficient understanding dynamic processes affecting environment. In this study, a system subsea geological environments was developed deployed 36 days continuous monitoring area Qingdao. It found that wave action significantly altered sediment mechanical properties, with 5% sound velocity increase correlating 39% lower compression, 7% higher cohesion, 11% greater internal friction angle, 50% reduced excess pore water pressure at 1.0–1.8 m depth. suggesting sustained 2.2 loads expelled water, driving property variations sediments. This lays foundation early warning disasters.

Language: Английский

Mixed vector autoregression and GARCH–Copula approach for long-term streamflow probabilistic forecasting in a multisite system DOI

Saijin Ji,

Bin Xu, Yu Sun

et al.

Stochastic Environmental Research and Risk Assessment, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 15, 2025

Language: Английский

Citations

0
Research on Optimizing the Development of Sports and Leisure Industry Using Genetic Algorithm to Promote the Growth of Local Sports Economy DOI Open Access

Ying Hou Jiao,

Bing Cao

Applied Mathematics and Nonlinear Sciences, Journal Year: 2025, Volume and Issue: 10(1)

Published: Jan. 1, 2025

Abstract With the improvement of people’s living standards and enhancement health consciousness, sports leisure industry is rapidly emerging as an important force to promote local economic development. In this paper, firstly, a cross-regional multi-objective integration model resources constructed, then genetic algorithm based on non-uniform variation operator used further optimize allocation resources. Finally, vector autoregressive (VAR) analyze relationship between development growth economy, support effect paper’s promotion economy. The improved finds optimal solution for resource in industry, thus achieving optimization And VAR analysis found that, long run, there positive correlation growth. short term, when equilibrium state fluctuates, added value current period adjusts non-equilibrium previous with strength -0.2526 times, which pulls it back long-term state. addition, both are affected by shocks themselves. This paper provides feasible practical path optimizing industries.

Language: Английский

Citations

0
Dynamic Analysis of Subsea Sediment Engineering Properties Based on Long-Term In Situ Observations in the Offshore Area of Qingdao DOI Creative Commons
Zhiwen Sun, Yanlong Li, Nengyou Wu

et al.

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(4), P. 723 - 723

Published: April 4, 2025

The drastic changes in the marine environment can induce instability of seabed sediments, threatening safety engineering facilities such as offshore oil platforms, pipelines, and submarine optical cables. Due to lack long-term situ observation equipment for properties most existing studies have focused on phenomena erosion suspension boundary layer wave-induced liquefaction, leading insufficient understanding dynamic processes affecting environment. In this study, a system subsea geological environments was developed deployed 36 days continuous monitoring area Qingdao. It found that wave action significantly altered sediment mechanical properties, with 5% sound velocity increase correlating 39% lower compression, 7% higher cohesion, 11% greater internal friction angle, 50% reduced excess pore water pressure at 1.0–1.8 m depth. suggesting sustained 2.2 loads expelled water, driving property variations sediments. This lays foundation early warning disasters.

Language: Английский

Citations

0