A multi-level optimization technique based on fuel consumption and energy index in early-stage ship design

Zakerdoost, Hassan; Ghassemi, Hassan

doi:10.1007/s00158-018-2136-7

Cited by 9 publications

(3 citation statements)

References 37 publications

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“…Different upper limits selected will have different fusion results, affecting the accuracy and robustness of the fusion results [8]. And in the process of multiple information fusion, fuzzy logic reasoning can be directly in the process of reasoning to put the uncertainty of multisensor [9], so the observation information fusion with fuzzy set credibility objectively calculated this topic will be discussed and become one of the research question, is one aspect of this research paper. As an important branch of statistical theory, D-S evidence theory has been widely used in many fields such as multisensor data fusion, target recognition, and uncertain reasoning due to its practicality and operability in engineering applications and its ability to clearly represent "uncertain and unknown" data information.…”

Section: Related Workmentioning

confidence: 99%

Advanced Intelligent English Translation Based on Multisensor Data Fusion Optimization

Wang

2022

Journal of Sensors

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English translation activity course is of great significance to cultivate students’ English translation level. In the context of multisensor data fusion, how to effectively carry out English translation activity course in colleges and universities has become an important topic. The educational value and intellectual property of advanced Intelligent English translation activity course are analyzed. From multisensor data fusion and the improvement of translation, translators psychological changes of the boot and prominent features, English translation activity and translation, the generality of the multisensor data fusion of multisensor data fusion personalization features this four aspects, which is under the background of the sensor data fusion of the practice for college English translation activity. Firstly, the theory of data fusion estimation is elaborated, and various data fusion structures in multisensor systems are summarized. Then, the data fusion estimation model based on Kalman filter is established, and the Kalman filtering algorithms of centralized, sequential, parallel, and joint structures are given, respectively. Simulation experiments are carried out on the algorithms. Experimental results show that the estimation accuracy of the system can be improved by multisensor data fusion. Then a rule-based lexical analyzer is designed. Combined with the system model, a rule-based lexical analyzer and a comprehensive dictionary, the linguistic knowledge source throughout the whole machine translation process, are researched and designed. A hashing algorithm for lexical retrieval is designed, and various rules and data structures related to the lexical analyzer are described in formal language. The analysis algorithms of morphological preprocessing, morphological analysis, unincluded word processing, phrase analysis, and part of speech tagging are introduced.

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Section: Related Workmentioning

confidence: 99%

Advanced Intelligent English Translation Based on Multisensor Data Fusion Optimization

Wang

2022

Journal of Sensors

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“…Boundary element method [24][25][26][27][28][29][30] CFD https://doi.org/10.1371/journal.pone.0302054.t001…”

Section: Conducted By Authorsmentioning

confidence: 99%

Optimization of ship hull forms by changing CM and CB coefficients to obtain optimal seakeeping performance

Khosravi Babadi,

Ghassemi

2024

PLoS ONE

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Ship design involves optimizing the hull in order to enhance safety, economic efficiency, and technical efficiency. Despite the long-term research on this problem and a number of significant conclusions, some of its content still needs to be improved. In this study, block and midship coefficients are incorporated to optimize the ship’s hull. The considered ship was a patrol vessel. The seakeeping analysis was performed employing strip theory. The hull form was generated using a fuzzy model. Though the body lines generated by the midship coefficient (CM) and block coefficient (CB) varied indecently, the other geometric parameters remained the same. Multi-objective optimization was used to optimize CB and CM. According to the results of this study, these coefficients have a significant impact on the pitch motion of the patrol vessel as well as the motion sickness index. Heave and roll motions, as well as the added resistance, were not significantly influenced by the coefficients of CM and CB. However, increasing the hull form parameters increases the maximum Response Amplitude Operator (RAO) of heave and roll motions. The frequency of occurrence of the maximum roll RAO was in direct relation with CB and CM. These coefficients, however, had no meaningful impact on the occurrence frequency of other motion indices. In the end, the CB and CM coefficients were selected based on the vessel’s seakeeping performance. These findings might be used by shipbuilders to construct the vessel with more efficient seakeeping performance.

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“…They investigated on the hydrodynamic characteristics of the propeller-rudder system (PRS) and AZIPOD [12,13,14]. They also prepared a comprehensive HPSOP code for hydrodynamic multidisciplinary optimization of a ship and its propeller [15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Characteristics of the Propeller-Rudder Interaction by RANS Solver

Javadpour¹,

Noghani²,

Ghassemi³

et al. 2019

AJME

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This paper is presented the interaction between propeller and rudder at different operating conditions by using ANSYS-Fluent software. A moving reference frame (MRF) method is applied and the flow equations are solved using Reynolds-Averaged Navier-Stokes (RANS) method and the K-ω SST turbulent model. The propeller is selected VP1304 and rudder is spade type with NACA0015 section. Hydrodynamic characteristics of the propeller with and without rudder, effect of rudder on the propeller performance, rudder lift and drag, pressure and velocity contour are presented discussed. The results show that the rudder effect on the propeller is small while the propeller on the lift and drag of the rudder may be significant.

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A multi-level optimization technique based on fuel consumption and energy index in early-stage ship design

Cited by 9 publications

References 37 publications

Advanced Intelligent English Translation Based on Multisensor Data Fusion Optimization

Advanced Intelligent English Translation Based on Multisensor Data Fusion Optimization

Optimization of ship hull forms by changing CM and CB coefficients to obtain optimal seakeeping performance

Hydrodynamic Characteristics of the Propeller-Rudder Interaction by RANS Solver

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