A Recurrent Neural Network (RNN) model is presented in this paper to predict the ship maneuvering motion. Inputs are orders of rudder angle and its variation as well propeller speed (ship speed) also recursive outputs velocities surge, sway yaw. The past values for retained inputs indicate influence historical state motion on prediction. KRISO Container Ship (KCS) taken study object. data obtained from a manoeuvring mathematical free-running test respectively used train neural network....

Single-turn coil (STC) is a destructive pulse magnet aiming at 100–300 T ultra-high magnetic field. A transient discharge circuit model considering the coupling of electromagnetic diffusion and conductor deformation proposed, impedance characteristics are investigated. The results show that resistance first decreases then increases due to temperature rise, respectively, while inductance always because conductor’s outward motion. By comparison, simulation consistent with experimental data,...

Abstract Single-turn coil (STC) is a destructive pulsed magnet aiming at 100–300 T ultra high magnetic field. A conductor vaporization model proposed for STCs. Using this model, the characteristics different inner diameters and discharge currents are investigated. The results show that always starts from surface of conductor, but only interior higher current smaller diameter. Moreover, causes electrical conductivity to decrease, leading area with highest density advance conductor. By...

A unique flow control approach, blow suction combined jet (BSCJ), was presented to enhance the hydrodynamic performance of hydrofoils without need external energy resources. Utilizing three-dimensional (3D) NACA0015 (National Advisory Committee for Aeronautics, NACA) foil as a case study, orthogonal design methodology is employed geometric and parameters, including suction/blow point momentum coefficient. The fluid dynamics BSCJ at various angles attack were numerically assessed using large...

Abstract Single-turn coil (STC) is a destructive pulse magnet aiming at 100–300 T ultra-high magnetic field. In this study, conductor shock dynamics model based on the hardening and thermal softening effects proposed for STCs. Using model, changes in mechanical parameters of during discharge are investigated. The results show that yield strength bulk modulus conductors significantly strengthened discharge. Moreover, without considering simulations, deformation velocities displacements higher...

Single-turn coil (STC) is a destructive pulse magnet aiming at 100–300 T ultra-high magnetic field. A thermal–electrical coupling model, in which the solid–liquid phase transition process considered, proposed. The effects of on pressure, temperature, and electrical conductivity are investigated. results show that compressed stretched regions coexist simultaneously, distribution both changes with time during discharging. Moreover, region highest current density inside conductor, since reduces...

Single-turn coil (STC) is a destructive pulsed magnet aiming at 100–300 T magnetic field. Mass-loading the method to increase STC In this study, unified solid-multiphase flow model proposed solve shock contact problem between conductor and mass-loading material. This gives approach equate solid viscid fluid melted material derives constitutive for under non-adiabatic state. Especially, calculate modulus investigated. The results show that equivalent viscosity of decreases as strain rate...

The propulsive characteristics of self-propelling 3D flexible foil are numerically studied. Two kinds dynamic boundary techniques, namely the mesh technique and overlapping technique, used to realize self-propulsion foil. effects aspect ratio (AR), characteristic thickness (d), section shape on Results demonstrate that moving velocity increases monotonically with consistent growth AR, a linear relationship is found between them. peak value efficiency can be acquired when AR = 1.0. Moreover,...

The propulsive performance of a bio-inspired autonomous underwater glider (AUG) with active twin undulatory wings undergoing motion was investigated by numerically solving the viscous incompressible Navier–Stokes equations, coupled immersed boundary method. aspect ratio (AR) effects were studied. simulation results showed that increase AR, thrust force generated linear growth, while propulsion efficiency AUG increased to peak and then decreased. optimum magnitude AR around 2 obtained in...

A grey-box modelling incorporating mechanism and data is presented in this paper to predict the ship manoeuvering motion. The traditional mathematical model three degrees of freedom adopted reveal known movement mechanism, which an additional hydrodynamic correction term developed by Neural Network (NN) based on adaptively estimate errors induced idealised approximation. KRISO Container Ship (KCS) taken as study object free-running tests are carried out obtain for establishing NN terms....

The pulsed magnets for 80 T are usually designed as a dual-coil system, with concentric and symmetrical structures. In this paper, new duplex magnet is designed. Its outer coil made of CuCrZr wire, instead CuNb to reduce the manufacturing cost magnet. inner structure improved reinforced by stainless steel sleeve cooling channels stress on it shorten its time, which beneficial long-term operation strength wire has been tested, influence electromagnetic force caused assembly deviation in...

A magnet has been developed to generate 30 T pulsed magnetic field with 100 ms flat-top at the Wuhan National High Magnetic Field Center (WHMFC). By adjusting conductor height of each layer, this a typical bore 20 mm diameter and conical degree opening angle on one side for X-ray diffraction neutron scattering experiments. Fast cooling technique was used better performance, 8 stainless steel rods were placed in channel resist strong axial electromagnetic force. The connected series an...

The class-conditional image generation based on diffusion models is renowned for generating high-quality and diverse images. However, most prior efforts focus images general categories, e.g., 1000 classes in ImageNet-1k. A more challenging task, large-scale fine-grained generation, remains the boundary to explore. In this work, we present a parameter-efficient strategy, called FineDiffusion, fine-tune large pre-trained scaling with 10,000 categories. FineDiffusion significantly accelerates...

Abstract Internal solitary waves are a common nonlinear large amplitude internal wave in nature, which can cause strong divergence and sudden currents seawater during propagation, thus having great destructive effects on marine structures. The paper focuses numerical generation based three types of theories. simulated by RANS method the paper. results theories compared analyzed. It shows that under same water tank scale calculation conditions, mKdV theory obtain largest amplitude, followed...

<title>Abstract</title> Motivated by the efficient movement of sea creatures, a novel conceptual design bionic Unmanned Underwater Vehicle (UUV) was proposed in this article for purpose improving propulsive performance UUV based on traditional propulsion device, like propeller, etc. The current consists two parts, fuselage and four flexible foils. former part serves as storage module, where battery block sensor devices are placed. latter functions module travelling wavy motion adopted...

Abstract Single-turn coil (STC) is a kind of destructive pulsed magnet aiming at ultra high magnetic field. In this study, the simple geometry optimization approach to improve field homogeneity STC proposed. By making conductor inner surface concave, amplitude decreased by only 15%, while space volume homogeneous increased 200%–600%. Through three examples with different diameters and discharge currents, effectiveness method validated. particular, it theoretically proven that increases as...