Results 51 to 60 of about 82,902 (182)

Application of wave added resistance calculation method in comprehensive optimization design of ship hull form

Zhongguo Jianchuan Yanjiu, 2020
Objectives In order to obtain a good hull form with both static water and wave resistance performance, a bulk carrier is taken as the research object to carry out the comprehensive optimization design of the hull form.Methods The evaluation of the static
MENG Qiao, QU Yuan, CHEN Ling
doaj   +1 more source

Mixed-Fidelity Design Optimization of Hull Form Using CFD and Potential Flow Solvers

Journal of Marine Science and Engineering, 2021
The present paper proposes a new mixed-fidelity method to optimize the shape of ships using genetic algorithms (GA) and potential flow codes to evaluate the hydrodynamics of variant hull forms, enhanced by a surrogate model based on an Artificial Neural ...
Gregory J. Grigoropoulos, Christos Bakirtzoglou, George Papadakis, Dimitrios Ntouras   +3 more
doaj   +1 more source

An Exponential Lower Bound on the Complexity of Regularization Paths

, 2012
For a variety of regularized optimization problems in machine learning, algorithms computing the entire solution path have been developed recently. Most of these methods are quadratic programs that are parameterized by a single parameter, as for example ...
Gärtner, Bernd, Jaggi, Martin, Maria, Clément   +2 more
core   +2 more sources

A Transfer Learning Based Dual-Surrogate-Assisted Hull Form Optimization Method [PDF]

Jisuanji gongcheng
In the surrogate-assisted optimization of expensive objective functions, obtaining enough samples is time-consuming in fluid simulations. This paper proposes a Transfer Learning based Dual-Surrogate-Assisted hull form Optimization (TLDSAO) algorithm to ...
AN Chang, MAO Li
doaj   +1 more source

Analytical Review of Numerical Analysis in Hydrodynamic Performance of the Ship: Effect to Hull-Form Modifications

Mekanika
This review paper provides an overview of simulation-based hydrodynamic design optimization for ship hull forms. It also includes a numerical analysis aimed at accomplish early-stage simulation-based design in terms of hydrodynamic performance.
Aldias Bahatmaka, Deni Fajar Fitriyana, Samsudin Anis, Achmad Yanuar Maulana, Mamad Tamamadin, Sang Won Lee, Joung Hyoung Cho   +6 more
doaj   +1 more source

Computation with Polynomial Equations and Inequalities arising in Combinatorial Optimization

, 2009
The purpose of this note is to survey a methodology to solve systems of polynomial equations and inequalities. The techniques we discuss use the algebra of multivariate polynomials with coefficients over a field to create large-scale linear algebra or ...
A Kehrein, AV Gelder, D Grigoriev, D Henrion, E Gilbert, E. Balas, G Reid, G Stengle, H Sherali, J Gouveia, J Lasserre, J Lasserre, JB Lasserre, L Vandenberghe, L. Lov´asz, M Laurent, NZ Shor, PA Parrilo, T Hogg, W Eberly   +19 more
core   +2 more sources

Hull form optimization for polar carrier based on navigation state recognition model

Journal of Ocean Engineering and Science
Polar Carriers operate in both open water and brash ice areas, where differing navigation environments impose varying requirements on hull form design.
Jianmei Chen, Zhe Chen, Qiang Ma, Yuqing Zhang, Yanping He   +4 more
doaj   +1 more source

Application of the Design of Experiments and Computational Fluid Dynamics to Bow Design Improvement

Journal of Marine Science and Engineering, 2019
Techniques of the design of experiments (DOE) and computational fluid dynamics (CFD) were applied for improving the bow shape of a tanker hull. Through this, a hull that could reduce the added resistance in waves was derived.
Woochan Seok, Gwan Hoon Kim, Jeonghwa Seo, Shin Hyung Rhee   +3 more
doaj   +1 more source

Research on Optimization Design of Ice-Class Ship Form Based on Actual Sea Conditions

Journal of Marine Science and Engineering
With the natural evolution of the Arctic route and advancements in related technologies, the development of new green ice-class ships is becoming a key technological breakthrough for the global shipbuilding industry.
Yu Lu, Xuan Cao, Jiafeng Wu, Xiaoxuan Peng, Lin An, Shizhe Liu   +5 more
doaj   +1 more source

Hull-form optimization of a container ship based on bell-shaped modification function

International Journal of Naval Architecture and Ocean Engineering, 2015
In the present study, a hydrodynamic hull-form optimization algorithm for a container ship was presented in terms of the minimum wave-making resistance.
Hee Jong Choi
doaj   +1 more source