The hydrodynamic equations of superfluids for a weakly interacting Bose gas are generalized to include the effects of periodic optical potentials produced by stationary laser beams. The new equations are characterized by a renormalized interaction coupling constant and by an effective mass accounting for the inertia of the system along the laser direction. For large laser intensities the effect...

The study of position control for variable stiffness actuators is important improving their energy efficiency and robustness. In this paper, the previously proposed nonlinear actuator, firstly, a dynamic model actuator system established based on two-inertia-system theory. Secondly, effects friction gravity factors performance are analyzed. results show that have obvious characteristics in cons...

in previous papers authors have considered agents as inertia-less self driven particles and designed a flocking algorithm. application of this algorithm to agents with considerable inertial characteristics needs a behavioural controller. the controller uses the local information and helps every agent to imitate the desired behaviour as a member of the flocking frame which covers the main issue ...

(the prime indicates differentiation with respect to x). P(x) and Q(x) (positive downward) are the live load per unit length and the dead load of the roadway, cable, and hangers per unit length. E and / (assumed constants) are the modulus of elasticity and moment of inertia of the roadway and H (constant) is the horizontal dead-load tension in the cable. The term h (constant), the induced live-...

In many robotics applications, knowing the material properties around a robot is often critical for the robot’s successful performance. For example, in mobility, knowledge about the ground surface may determine the success of a robot’s gait. In manipulation, the physical properties of an object may dictate the results of a grasping strategy. Thus, a reliable surface identification system would ...

This work investigates the energy shaping control of a class underactuated mechanical systems with first-order actuator dynamics and subject to both matched unmatched constant additive disturbances. To this end, new nonlinear law which includes two independent integral actions is presented. The controller design outlined for dynamics, also direct actuation. effectiveness proposed approach demon...

Particle swarm optimization (PSO) is an evolutionary computing method based on intelligent collective behavior of some animals. It is easy to implement and there are few parameters to adjust. The performance of PSO algorithm depends greatly on the appropriate parameter selection strategies for fine tuning its parameters. Inertia weight (IW) is one of PSO's parameters used to bring about a balan...

When a solid body is freely rotating at an angular velocity Ω, the ellipsoid of constant angular momentum, in the space Ω1, Ω2, Ω3, has poles corresponding to spinning about the minimal-inertia and maximal-inertia axes. The first pole may be considered stable if we neglect the inner dissipation, but becomes unstable if the dissipation is taken into account. This happens because the bodies dissi...

28 Background. Therapeutic inertia has been defined as the failure of health-care provider to 29 initiate or intensify therapy when therapeutic goals are not reached. It is regarded as a major 30 cause of uncontrolled hypertension. The exploration of its causes and the interventions to 31 reduce it are plagued by unclear conceptualizations and hypothesized mechanisms. We 32 therefore systematic...