Explore the vast range of titles available.

The following paper and all associated content has been officially retracted at the request of the authors. Any questions related to this retraction can be directed to: cerf.jcr@gmail.com

Zhou, W., 2019. Simulation of hydraulic system faults for marine machinery based on AMESim. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 357–361. Coconut Creek (Florida), ISSN 0749-0208. With the rapid development of marine ship manufacturing, engineering machinery has become more complex, continuous and automated. It has become the focus of current research to effectively detect the hydraulic system of marine machinery using the modern scientific methods. For this, the Advanced Modelling Environment for Simulation of Engineering Systems (AMESim) was adopted in this study. By fully explaining the model of the basic hydraulic components and the parameter selection of the overall modelling for the marine machinery hydraulic system, this paper achieves the simulation design of the marine machinery hydraulic system based on the AMESim integrated platform. The comparison between the AMESim-based simulation results and the mathematical model verifies the rationality of the AMESim-based simulation for the marine machinery hydraulic system; meanwhile, compared with the simulation results based on MATLAB, the AMESim-based simulation shows good superiority, which is of great guiding significance for shipbuilding projects.

Sun, M.; Zhang, C.-Y., and Xie, C.-Y., 2019. Structural characteristics analysis and optimization of large hydraulic press water control system for marine engineering. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 332–336. Coconut Creek (Florida), ISSN 0749-0208. With the development of science and technology and the construction of offshore oil platforms, the optimization of water control systems for large hydraulic press has become an inevitable trend in marine engineering research. Combining with related theories of mechanical engineering and marine engineering, and numerical analysis method, this paper adopted the finite element analysis software ABAQUS to establish numerical models for the water inlet and outlet valves of the hydraulic press, it simulated and analyzed the flow field state of the valve port under different fluid pressures and spool displacements, thereby studying the structural characteristics and optimization of the hydraulic press water control system. The results showed that when the fluid past through the inlet valve, local low-pressure zones appeared at the inlet valve port, and the low-pressure zones inside the inlet valve port increased with the increase of the spool displacement; the fluid pressure had a certain degree influence on the flow performance of the inlet valve, under the same spool displacement, the fluid flow increased with the displacement of the inlet valve spool; the speed increase of fluid flow past through the outlet valve gradually increased with the increase of the displacement of the outlet valve spool, the fluid pressure of the outlet valve increased first and then decreased as the displacement of the spool increased. This study provided technical support for the application of hydraulic press in marine engineering and laid a theoretical foundation for the structural optimization of hydraulic press.

Mu, Z.; Mu, H.; Zhang, H.G., and Li, Z.-P., 2019. Reliability analysis and numerical simulation of reinforced concrete structure in port engineering. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 347–351. Coconut Creek (Florida), ISSN 0749-0208. In addition to the normal loss and damage during the service period, the port engineering facilities are also affected by harsh environments such as water erosion, wave erosion, atmospheric corrosion and freezing and thawing. Therefore, it is very important to analyze the reliability of reinforced concrete structures. The reliability analysis of reinforced concrete members is actually based on the fact that the statistical characteristics of the existing loads and structural resistance are known, and the reliability index value of the members is determined through specific calculations to understand the failure probability. Taking the reinforced concrete frame column as an example, the finite element model is established by the simulation software to simulate and analyze the compression of the port structure under the action of ship impact force, ship system force, doorsill machine load, self-weight load and water flow force, the reliability of shear and bending capacity, the analysis results provide the basis for engineering construction and followup research.

Mi, D.-C.; Luo, J.-H.; Liu, X.-L.; Xu, L.-W., and Chen, D.-Q., 2019. Origin distribution and geotechnical characters of marine soft clay in Guangxi coastal highway. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 269–274. Coconut Creek (Florida), ISSN 0749-0208. To further study the origin and distribution characters of marine soft clay, the geotechnical characters are explored. First, basic definition of marine soft clay is interpreted by specifications of China and foreign countries. Marine soft clay derives from the north, south, and the central China as divided based on the sedimentary environment and distributive scope. There is also a regional division for marine soft clay in Guangxi, situated in the south China. Subsequently, the mechanical parameters of marine clay in the coastal area and in Guangxi are also analyzed, and the characters of marine soft clay in Guangxi are revealed based on the indoor soil test in the local. These survey results show that: (1) Guangxi's marine soft clay can be developed in three areas: Fangcheng port, Beihai and Qinzhou; (2) In China's coastal areas, the properties of marine soft clay from the north to the south get worse, forming the law of “strength in the north and weakness in the south”. The northernmost Qinzhou in Guangxi develops the worst marine soft clay, while in Guangxi Fangcheng port, the marine soft clay is the best; (3) In Qinzhou district, Guangxi, the structural yield stress of the marine soft clay is about 81 kPa, and the critical creep stress is 60∼70 kPa, demonstrating structural and rheological properties of marine soft clay in Guangxi.

Ma, L., 2019. Application of building information model (BIM) in the design of marine architectural structures. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 117–120. Coconut Creek (Florida), ISSN 0749-0208. Aiming at the problem of low visual accuracy in the design of offshore building structures, this paper puts forward the application of BIM in the design of offshore building structures. In the process of using BIM technology, the design of unmarked marine building structures can be effectively marked by these BIM technologies. In order to evaluate the effectiveness of the algorithm, a hybrid feature is used to represent the structural design of offshore buildings, so that the stereo disparity generation process can be completed quickly. The experimental results show that the proposed building information model (BIM) can effectively generate stereo parallax in virtual scenes.

Dai, C.-Q.; Long, Y.-X.; Lv, Y.-L.; Hou, W.-Z., and Sui, H.-T., 2019. Water inrush mechanism and safety control in drilling and blasting construction of subsea tunnel. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 218–222. Coconut Creek (Florida), ISSN 0749-0208. Based on the water inrush (WI) patterns of shallow buried tunnels, this paper elaborates on the WI mode and mechanism during the drilling and blasting of subsea tunnels in consideration of the characteristics of high-water pressure and complex geology of submarine tunnels. Then, through the main analysis for the deformation law of surrounding rock caused by drilling and blasting, it establishes the relationship between subsea/tunnel vault crown settlement and WI in construction under the construction conditions of unfavourable geological body, to obtain the two main failure modes of submarine tunnel: stratum cracking and partial separation failure. Besides, according to the characteristics of stratum deformation, the deformation displacement analysis of the roof and side walls of the tunnel was conducted to establish the safety control risk early warming mechanism on the basis of the risk control relationship between the measured values, early warning values, alarm values and limit control values of the stratum deformation. Finally, based on the core safety risk factors of the planning, design and construction stages of the subsea tunnel, the corresponding safety risk control measures were formulated.

Li, C.; Zhao S.-Y.; Zhou H.-Q., Liu C., and Zhang, Y.-T., 2019. A review of research progress of vegetation concrete on coastal highway slope. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 367–371. Coconut Creek (Florida), ISSN 0749-0208. As a main road connecting the city and a landscape road, the coastal road is particularly important to the greening of the exposed slope in order to avoid the formation of a large number of exposed rock slopes in the construction process and affect the landscape. In view of the difficulty in greening the rock slope, the development of new materials such as vegetation concrete (VC) can effectively control the greening problem of rock slope. For this, this paper briefly introduces the development process of slope greening, discusses the research progress of VC from the aspects of substrate ratio, mechanical property, root-soil combination effect and fertility level, and then studies the problems existing on the current research. Finally, it proposes several prospects for the greening construction of rock slope.

Song, W.; Xu, M.-M., and Dolma, Y.-C., 2019. Design and implementation of beach sports big data analysis system based on computer technology. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 327–331. Coconut Creek (Florida), ISSN 0749-0208. Applying computer technology and data mining technology in sports field plays an important role in improving the training effect and competition level of athletes. This paper focuses on the design and implementation of the beach volleyball big data analysis system based on computer technology. Using computer as the data collection and analysis platform, it adopts the sorting prediction algorithm and the Markov-based data mining algorithm to predict the cooperation success rate in the beach volleyball match and to search for key action transfer processes. The paper designs and implements a beach volleyball big data analysis system based on computer technology, and experimental results have verified the effectiveness of the data mining algorithm in beach volleyball matches. This study provides a scientific basis for coaches to formulate reasonable beach volleyball training programs and tactical decisions, which is of certain practical significance.

Due to the limited self-repair capacity of the hyaline cartilage, the repair of cartilage remains an unsolved clinical problem. Tissue engineering strategy with 3D bioprinting technique has emerged a new insight by providing patient’s personalized cartilage grafts using autologous cells for hyaline cartilage repair and regeneration. In this review, we first summarized the intrinsic property of hyaline cartilage in both maxillofacial and orthopedic regions to establish the requirement for 3D bioprinting cartilage tissue. We then reviewed the literature and provided opinion pieces on the selection of bioprinters, bioink materials, and cell sources. This review aims to identify the current challenges for hyaline cartilage bioprinting and the directions for future clinical development in bioprinted hyaline cartilage.