82,197 research outputs found
The structure and modeling results of the parallel spatial switching system
Problems of the switching parallel system designing provided spatial
switching of packets from random time are discussed. Results of modeling of
switching system as systems of mass service are resulted.Comment: 3 pages, 2 figur
Neuro-memristive Circuits for Edge Computing: A review
The volume, veracity, variability, and velocity of data produced from the
ever-increasing network of sensors connected to Internet pose challenges for
power management, scalability, and sustainability of cloud computing
infrastructure. Increasing the data processing capability of edge computing
devices at lower power requirements can reduce several overheads for cloud
computing solutions. This paper provides the review of neuromorphic
CMOS-memristive architectures that can be integrated into edge computing
devices. We discuss why the neuromorphic architectures are useful for edge
devices and show the advantages, drawbacks and open problems in the field of
neuro-memristive circuits for edge computing
Voltage-induced strain clocking of nanomagnets with perpendicular magnetic anisotropies
Nanomagnetic logic (NML) has attracted attention during the last two decades
due to its promise of high energy efficiency combined with non-volatility. Data
transmission in NML relies on Bennett clocking through dipole interaction
between neighboring nanomagnetic bits. This paper uses a fully coupled finite
element model to simulate Bennett clocking based on strain-mediated
multiferroic system for Ni, CoFeB and Terfenol-D with perpendicular magnetic
anisotropies. Simulation results demonstrate that Terfenol-D system has the
highest energy efficiency, which is 2 orders of magnitude more efficient than
Ni and CoFeB. However, the high efficiency is associated with switching
incoherency due to its large magnetostriction coefficient. It is also suggested
that the CoFeB clocking system is slower and has lower bit-density than in Ni
or Terfenol-D systems due to its large dipole coupling. Moreover, we
demonstrate that the precessional perpendicular switching and the Bennett
clocking can be achieved using the same strain-mediated multiferroic
architecture with different voltage pulsing. This study opens new possibilities
to an all-spin in-memory computing system
Full-wave parallel dispersive finite-difference time-domain modeling of three-dimensional electromagnetic cloaking structures
A parallel dispersive finite-difference time-domain (FDTD) method for the
modeling of three-dimensional (3-D) electromagnetic cloaking structures is
presented in this paper. The permittivity and permeability of the cloak are
mapped to the Drude dispersion model and taken into account in FDTD simulations
using an auxiliary differential equation (ADE) method. It is shown that the
correction of numerical material parameters and the slow switching-on of source
are necessary to ensure stable and convergent single-frequency simulations.
Numerical results from wideband simulations demonstrate that waves passing
through a three-dimensional cloak experience considerable delay comparing with
the free space propagations, as well as pulse broadening and blue-shift
effects
A modal approach to hyper-redundant manipulator kinematics
This paper presents novel and efficient kinematic modeling techniques for “hyper-redundant” robots. This approach is based on a “backbone curve” that captures the robot's macroscopic geometric features. The inverse kinematic, or “hyper-redundancy resolution,” problem reduces to determining the time varying backbone curve behavior. To efficiently solve the inverse kinematics problem, the authors introduce a “modal” approach, in which a set of intrinsic backbone curve shape functions are restricted to a modal form. The singularities of the modal approach, modal non-degeneracy conditions, and modal switching are considered. For discretely segmented morphologies, the authors introduce “fitting” algorithms that determine the actuator displacements that cause the discrete manipulator to adhere to the backbone curve. These techniques are demonstrated with planar and spatial mechanism examples. They have also been implemented on a 30 degree-of-freedom robot prototype
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