A hopping robot can jump over the barrier several times higher than its own height. The combination of the hopping movement and the wheeling movement can greatly enhance the scope of robot’s activities. In this paper, a novel five-shank hopping mechanism was employed to build the wheelinghopping combination scout robot. The nonlinear character of the five-shank hopping mechanism was analyzed an...

Traditional network defense approaches are insufficient to deal with new types of threats. Active based on software-defined networks helps solve this problem, which includes random port-hopping technology. Existing have problems such as the inability completely hide service port and complicated hopping mechanism. What is more, there no strict demonstration security effectiveness evaluation its ...

We propose a possible charge fluctuation effect expected in layered superconducting materials. In the multireference density functional theory, relevant fluctuation channels for the Josephson coupling between superconducting layers include the interlayer pair hopping derived from the Coulomb repulsion. When interlayer single-electron tunneling processes are irrelevant in the Kohn-Sham electroni...

Parallel rendezvous multi-channel MAC mechanisms are regarded as an efficient method for media access control in cognitive radio networks since they do not need a control channel and use only one transceiver. However, existing parallel rendezvous MAC mechanisms assume that all channels have the same maximum capacity and channel availability for secondary users. In this paper, we propose a dynam...

This paper proposes a new model of a one-legged hopping robot. The one-legged hopping robot is useful in realizing rapid movement such as that of a running animal. Although it has a simple leg mechanism, the dynamics are not simple and require non-linear complex analysis. This means that it is not easy to derive a controller for stable hopping in a systematic way. Therefore, a dynamics-based ap...

To improve the performance of short-range wireless communications, channel quality must be improved by avoiding interference and multi-path fading. Frequency hopping spread spectrum (FHSS) is a transmission technique where the carrier hops from frequency to frequency. For frequency hopping a mechanism must be designed so that the data can be transmitted in a clear channel and avoid congested ch...

Using the CTRW approximation the simplest possible nontrivial model of ac hopping conductivity in disordered solids, is constructed. The model predicts universality of the frequency-dependent conductivity, independent of temperature, chemical composition, and conductivity mechanism, in reasonably good agreement with experiments. It is shown that all qualitative features of experimental ac hoppi...

Abstract We present and numerically analyse the Basin Hopping with Skipping (BH-S) algorithm for stochastic optimisation. This replaces perturbation step of basin hopping (BH) a so-called skipping mechanism from rare-event sampling. Empirical results on benchmark optimisation surfaces demonstrate that BH-S can improve performance relative to BH by encouraging non-local exploration, is, between ...

Qualitatively new transport mechanism is suggested for hopping of carriers according to which the variable-range hopping (VRH) arises from the resonant tunneling between transport states brought into resonance by Coulomb potentials produced by surrounding sites with fluctuating occupations. A semiquantitative description of the hopping transport is given based on the assumption that fluctuation...