Abstract In the world of oil and gas, there will definitely be a structure for either production process, exploration so on. The consists three types, namely fixed structure, floating moored structure. Floating structures can best option in terms cost time. Things that interfere with when operating are environmental loads. One example its operation is offloading, it offloading side by or tandem...

In port surveillance, video-based monitoring is a valuable supplement to a radar system by helping to detect smaller ships in the shadow of a larger ship and with the possibility to detect nonmetal ships. Therefore, automatic video-based ship detection is an important research area for security control in port regions. An approach that automatically detects moving ships in port surveillance vid...

This paper presents the characteristics of heave motion responses and hydrodynamic forces a horizontal floating circular cylinder during wave–current interaction. A two-dimensional numerical model based on CFD (Computational Fluid Dynamics) method for modeling wave flow is validated verified. The were calculated analyzed under conditions different k values (stiffness spring), amplitudes, submer...

We are familiar with both pleasant and unpleasant psychotropic effects of movements associated with vestibular stimulation. However, there has been no attempt to scientifically explore the impact of different kinds of vestibular stimulation on mood states and biomarkers. A sample of 23 healthy volunteers were subjected to a random sequence of three different passive rotational (yaw, pitch, roll...

Objective: This study aims at investigating helicopter pilots’ strategies to achieve ship deck landing.Background: Helicopter maritime operations are challenging, especially when it comes landing on the moving decks of small ships, such as frigates, which can lead dramatic accidents.Method: Expert pilots were requested fly full maneuver from approach touchdown in an immersive simulator. Two sea...

ly, a symmetry of a structure is an automorphism— a transformation that maps the elements of an object back onto themselves so as to preserve the structure of that object. A physical theory speci…es a set of models— mathematical structures— that may be used to represent various di¤erent situations, actual as well as merely possible, and to make claims about them. Any application of a physical t...

in recent years, more attention has been paid on intelligent vehicle suspension systems equipped with magneto-rheological dampers. in order to investigate nonlinear vehicle dynamics, in the majority of the researches, a quarter-car model with one or two degrees of freedom is used. in such simple models, one can only study the bounce motion of sprung and unsprung masses. in this paper, in order ...

This paper presents an investigation of ISAR image classification based on a comparison of range-Doppler imagery to 3D ship reference models. This comparison is performed in the image domain by estimating the motion of a sequency of ISAR images, generating 3D reference models corresponding to the same motion and matching the models with the given ISAR images. The effect of estimation error in t...