ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
ABSTRACT This paper aims to introduce a new method for the analysis of non-linear and non-stationary signals. This method is based on empirical mode decomposition technology by decomposing signals into multiple eigenfunctions. But there is modal aliasing problem in this method. We combine the auxiliary ...
ABSTRACT Drillstring washout early detection is important to prevent drillstring twist-off and well blowout. In this paper, a new diagnosis method of washout failure is proposed based on a dynamic hydraulic model during a drillstring washout and pattern recognition method. The novel hydraulics model ...
ABSTRACT The safety of propulsion system which is regarded as the heart of ship receives more and more attention by the industry and academia. During the operation of the large vessel, the flexible ship hull could be deformed by the wave excitation more easily than before. The hull deformation would ...
ABSTRACT In order to adapt to the offshore extreme environment, a new semisubmersible offshore aquaculture platform is emerged. In this study, a series of experiments were carried out in the wave-current flume to study the motion responses of this aquaculture platform. According to the experimental ...
ABSTRACT Plates with double curvature are widely used in shipbuilding, and induction heating for plate bending is usually employed in shipyards due to its advantages such as high precision, high efficiency and so on. In this study, induction heating equipment with high frequency and 25KW in power was ...
ABSTRACT The application of podded propulsor brings advantages of higher feasibility in arranging, high degree of modularity and low level of noise and vibration, etc., which is very suitable for ship types of high value-added like cruise ship. This paper discusses the interaction between Podded propulsor ...
ABSTRACT Added wave resistance is the key parameter for estimating meteorological factor of Energy Efficiency Design Index, and is important for choosing suitable ship propulsion power. A practical numerical method, multi-domain high order boundary element method incorporated with three-dimensional ...
ABSTRACT A structural reliability analysis (SRA) has been performed for Equinor's Johan Castberg project to demonstrate that the 12" gas flowlines meet the required acceptance criteria in accordance with the design code DNV-OS-F101. The premise of the SRA is that the 12" gas flowline gains protection ...
ABSTRACT Predicting added resistances of a ship in actual seas is essential to optimize the hull form, to predict speed losses, to analyze speed sea trial results, to estimate the sea margin, and to find the optimum seaway route for eco-operation. This paper employs an experimental method to investigate ...
ABSTRACT As sea ice extent has decreased in the last decades in the Arctic, transport activities have grown, and the risk of unwanted events and marine accidents has increased. Navigation and rescue operations in the High North are unique given harsh weather and ice conditions, remoteness, vulnerable ...
ABSTRACT In practice, estimations of the navigating resistances of the ships designed for Arctic Shipping Routes are of great importance. Snow cover is generally the concomitant circumstance for natural sea ice and the ice breaking process is supposed to behave differently when snow is involved in. ...
ABSTRACT By referring to the effect of perforated caisson structure on wave abatement which is a new type of wharf structure, concrete block quay wall with wave dissipation hole structure was put forward. The effects of wave dissipation at the wharf front on different water depth, hole aperture and ...
ABSTRACT Wave added resistance has great influence on the rapidity and economy of ships, and it is one of the major issues that must be considered in the design of hull lines. In this paper, a panel method based on three dimensional potential flow theory is used to study the problem of wave added resistance. ...
ABSTRACT In this paper we describe experimental investigations of ice blocks collisions. Ice blocks of pyramidal and cubical shapes sawn from natural sea ice were used in the in-situ experiments. The accelerations of ice blocks colliding in the air and water environments were recorded by the accelerometer ...
ABSTRACT With the rapid development of offshore wind industry, the growth of installed capacity and the complexity of offshore, deep-water environment requires more efficient, automated, and integrated digital technologies to maximize the return. Building Information Modeling (BIM) has made remarkable ...
ABSTRACT In this study the performance of the Internet of Fish (IoF) concept, a real-time acoustic positioning and fish monitoring system, was assessed in a commercial marine fish farm in Norway. Central to the IoF concept is the Synchronisation and LoRa Interface Module (SLIM), which is a battery ...
ABSTRACT This paper examines the effect of including a tuna aquaculture component to a proposed integrated system utilizing ocean energy and microalgae to produce biofuel. Cost-benefit analysis and carbon footprint estimation show a significant improvement on both economic and environmental performance ...
ABSTRACT To improve the removal efficiency of residual bait and feces in the recirculating aquaculture tank, a hydrodynamic simulation technology was employed to establish a three-dimensional numerical model for a rectangular tank with arc angle. In this way, the influence of bottom structure, such ...
ABSTRACT This paper introduces an integrated system comprising a UAV mounted with a spectroradiometer, which is capable of collecting reflectance and parameters of water quality simultaneously. Reflectance and parameters of water quality, such as chlorophyll-a and turbidity were collected in five estuaries ...
ABSTRACT Floating mega islands can provide an attractive solution for creating temporal or more permanent space in coastal areas with a high demand for real estate. Also at open sea in the vicinity of wind farms, fish farms or logistical cross points, a floating mega island could be used as a hub, ...