The port waterway network plays an important role in the organization and management of ship traffic. Due to limited operations, conflicts, congestion, safety issues often arise waters. Conflicts between ships can be predicted by collision detection ships. A novel algorithm for trajectory pairs is proposed introducing variable time interval variables. In addition, improve overall accuracy compr...

one of the most valid and efficient models of long rod projectile penetration in homogeneous targets is tate and alekseevskii’s (a&t;) model. based on tate’s model, the present research tries to calculate the optimum speeds to achieve the maximum penetration depth in the homogeneous targets. the proposed collision speed-penetration depth diagrams are developed using tate’s model. in this way, v...

In this study, we examined the neuronal correlates of frog collision avoidance behavior. Single unit recordings in the optic tectum showed that 11 neurons gave selective responses to objects approaching on a direct collision course. The collision-sensitive neurons exhibited extremely tight tuning for collision bound trajectories with mean half-width at half height values of 0.8 and 0.9° (n = 4)...

mobile robot navigation is one of the basic problems in robotics. in this paper, a new approachis proposed for autonomous mobile robot navigation in an unknown environment. the proposedapproach is based on learning virtual parallel paths that propel the mobile robot toward the trackusing a multi-layer, feed-forward neural network. for training, a human operator navigates themobile robot in some...

The problem of collision detection is fundamental to inter active applications such as computer animation and virtual environments In these elds prompt recognition of possible impacts is important for computing real time response We present a simple exact collision detection algorithm for convex polytopes The algorithm nds quickly a separating plane between two polytopes if they are non collidi...

Real-time collision detection is required by most of all computer graphics applications. However, the current collision detection methods still have difficulties in achieving real time. Recent advances in programmable graphics hardware (GPU) make it possible to be used in general-purpose computation. In this paper, we explore to solve the collision detection problem with programmable GPUs. An a...

In advanced robotics, there is still a strong need for a fast reactive collision avoidance computable in realtime in order to prevent the robot from hazardous situations during motion. Most of these situations occur due to unforeseen events (e.g. collision objects entering the workspace accidently) or incorrect remote operation (e.g. scenery misinterpretation during teleoperation). Handling of ...

this paper aims to investigate a new and intricate behavior of immediate follower during the lane change of leader vehicle. accordingly, the mentioned situation is a transient state in car following behavior during which the follower vehicle considerably deviates from conventional car following models for a limited time, which is a complex state including lateral and longitudinal movement simul...

this paper focuses on the optimization of initiating dimensions of groove bearing in association with de- sired design of vehicle’s front structure which is made up of low carbon steels in the case of frontal collision. axial bearing analysis is done numerically using nonlinear finite element code ls-dyna. in this analysis, changes of two main parameters including measure of energy absorption o...

With discretized particle velocity space, a unified gas-kinetic scheme for entire Knudsen number flows is constructed based on the BGK model. In comparison with many existing kinetic schemes for the Boltzmann equation, the current method has no difficulty to get accurate solution in the continuum flow regime, such as the solution of the Navier-Stokes (NS) equations with the time step being much...