... is designed, which is portable, easy to operate, and can be equipped with multiple sensors. Different sampler modules can be combined to improve sampling efficiency and achieve in-situ high-fidelity sampling of polar lakes. It has created equipment and technical conditions for the study of lake sediments...

... production storage & offloading ship platform design floating production system freight & logistics services hull form case-a subsea system initial hull marine transportation fpso case-b resistance level ice full scale water condition minimum power efficiency coefficient polar ship...

... and polluting gases seriously which threaten the polar environment (Xing, Spence et al. 2020). To address this challenge, The International Maritime Organization (IMO) has introduced increasingly stringent laws and regulations, such as the Ship Energy Efficiency Management Plan (SEEMP)(IMO 2016); Ship Energy...

... scheme is proposed, which significantly improves the production efficiency. INTRODUCTION With the rapid development of industry and agriculture and the process of urbanization, the river and lake sediment composed of clay, silt and minerals produces flocculent or honeycomb structural substances...

... ABSTRACT The propulsive performance of dual flapping foils in a tunnel and their vortex motions have been studied through numerical simulations. The dual flapping foils can be high efficient. They can be used for the propulsor of surface vessels or underwater vehicles. Computational fluid...

... into account: increasing of the ship hull resistance and reduction of the propeller efficiency due to brash ice presence. The results of this study may be used in planning of long ship voyages in ice conditions, when the changes in propulsion performance due to brash ice become especially relevant...

... on the external characteristics; when the flow rate is greater than the design flow rate, the shape of the suction port of the blade has a significant influence on the pump head and efficiency. For the cavitation performance, the shape of the suction port of the blade has a great influence on the NPSHr...

... cycle efficiency voyage internal combustion engine configuration main engine ship power system co 2 battery energy storage system ABSTRACT This paper presents a design method of the ship power system containing optimal configuration and assessment. A multi-factor and multi-level...

... into low-order systems, and realize real-time calculation and analysis of the system while ensuring accuracy, and provide efficient real-time virtual mapping results for digital twin technology. Based on the proper orthogonal decomposition (POD), this paper takes the flow velocity as input variables...

... concentration characteristic dissipation tank suction hopper dredger deposition inlet concentration overflow concentration energy dissipation tank mixture model duration curve upstream oil & gas fine sediment efficiency settlement characteristic scenario hopper particle size...

... reservoir simulation waterjet propulsion efficiency optimization target approximate model artificial intelligence inlet duct duct efficiency hydrodynamic performance machine learning optwj scheme optimization scheme optduct scheme optimization result geometry duct outlet...

... ABSTRACT Inlet duct is an important flow passage component of water jet propulsion unit, the hydrodynamic performance of which has great effect on propulsion performance of propulsion pump. Therefore, special attention should be paid to the design of inlet duct. Generally, efficiency...

... on the Influence of the Rolling Angle of the Deep Sea Trawler on the Refrigeration Efficiency of the Cold Storage Hao Cai 1 Qingchao Xu 1 , Panpan Jia 1 Detang Li 1 Wei Wang 1,2,3 Yonghe Xie1* 1.School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, Zhejiang, China 2.School of Naval...

... ABSTRACT The analysis of data acquired by the dynamometer bench indicates that motor efficiency at each operating point appears basically normal distribution. Consequently, Gaussian Process Regression (GPR) is employed to estimate the motor efficiency mean map and efficiency standard deviation...

... ABSTRACT In order to make more efficient use of ship low-temperature waste heat, the self-developed waste heat recovery device is tested in this paper. For the sake of improve the heat storage and release efficiency of the device, this paper compares the heat storage and release experiment...

... the path and improve smoothness. To avoid emergent obstacles in the global path in real-time, the Morphin search tree algorithm is introduced to dynamically plan the global path. The simulation results show that this algorithm can improve the performance and efficiency of path planning, and is more...

... ABSTRACT In order to improve the propulsion efficiency of air propellers on an air cushion vehicle, the aerodynamic performance optimization work is carried out in this paper based on the parametric modeling, genetic algorithm, design-of-experiment and numerical simulation methods...

... approaches, although the hull resistance is overestimated by the MRF method, resulting in substantial calculation errors of the prediction of the self-propulsion coefficients. Within the framework of these techniques, the MRF method trends to be higher efficiency in computations but conversely...

... ABSTRACT Due to its special geometric shape and appropriate propeller and duct design, ducted propeller has the characteristics of low noise, high efficiency, and ability to work normally under heavy load conditions, which are superior to ordinary propellers. The existence of the duct has...

... methods, from advantages and disadvantages, power range, to technical issues, and analyzes the applicable ships and propulsion efficiencies for each type of propulsion method. Although shaftless rim propulsion and pod propulsion have various key technical challenges, their propulsion efficiencies...