The practical use of automated CFD-based design tools in ship-building industry requires powerful flow solvers, able to take into account realistic geometries as well as complex physical phenomena, such as turbulence. A shape optimization tool is developed in this framework. A derivative-free optimizer, yielding both flexibility and robustness, is preferred to the classical gradient-based metho...

The paper presents an optimization system which integrates a parametric design tool, 3D diffraction-radiation analysis and hydrodynamic performance assessment based on short and long term wave statistics. Controlled by formal optimization strategies the system is able to design offshore structure hulls with superior seakeeping qualities. The parametric modeling tool enables the designer to spec...

this study was conducted to assess the in vitro organic matter digestibility (omd) of pistachio hull using rumen fluid of taleshi sheep. animals were fed diets composed of 34% pistachio hull, 29% grape pomace, 32% alfalfa, and 5% grain barley. the chemical composition and phenolics' levels of pistachio hull, either industrially dried pistachio hull (idph) or sun dried pistachio hull (sdph)...

Fouling organisms reduce a ship’s fuel efficiency and disturb the ecosystem. Therefore, International Maritime Organization (IMO) many nations have enacted laws that mandate periodic hull cleaning for removing fouling organisms. However, niche areas of ship is extremely difficult. Due to their complex shape, applying antifouling paint with robots difficult, but about 80% are concentrated in are...

We present a statistical image-based “shape + structure” model for Bayesian visual hull reconstruction and 3D structure inference. The 3D shape of a class of objects is represented by sets of contours from silhouette views simultaneously observed from multiple calibrated cameras. Bayesian reconstructions of new shapes are then estimated using a prior density constructed with a mixture model and...

Spherical shell structures are the most suitable shape for deep-sea pressure hulls because they have ideal mechanical properties handling symmetrical pressure. However, accuracy requirement a hull in spherical structure subjected to is extremely high. Even minor asymmetry can significantly degrade its properties. In this study, new type of and integral hydro-bulge-forming (IHBF) method proposed...

A study was carried out to investigate methods and to determine the "optimum" hull form for monohull ships, based upon several weighted criteria. The main product of this study is a hull form optimization program. Propulsion power minimization is the primary focus of the program, although simplified. seakeeping and weight/cost issues can also be studied with the existing program. The program us...

The present paper proposes a new mixed-fidelity method to optimize the shape of ships using genetic algorithms (GA) and potential flow codes evaluate hydrodynamics variant hull forms, enhanced by surrogate model based on an Artificial Neural Network (ANN) account for viscous effects. performance forms generated GA is evaluated calm water resistance methods which are quite fast when they run mod...

The research presented in this thesis is targeted towards obtaining high quality novel views of a dynamic scene using video from multiple wide-baseline views, with free-viewpoint video as the main application goal. The research has led to several novel contributions to the 3D reconstruction computer vision literature. The first novel contribution of this work is the exact view-dependent visual ...