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The traditional method to obtain the response of electromagnetic devices over a wide frequency range is to use a frequency sweeping method. However, this method is very time consuming, especially in time-domain analysis. In order to save the heavy computational time, a novel fast algorithm based on finite-element method (FEM) to obtain the response under different frequencies is therefore proposed...
As an artificial material, the metamaterial has great applications in radar, stealth and electronic countermeasure because of its special electromagnetic properties. Considering its negative permittivity and negative permeability, the metamaterial is applied in wireless power transfer system to improve its performance. In this paper, a novel structure of metamaerial is designed. This metamaterial...
A wavelet based method for time delay and Doppler stretch estimation has been proposed. It makes use of the relationship between the wideband cross ambiguity function (WBCAF) and the cross wavelet transform of the received signals. This paper derives the Cramer-Rao lower bound (CRLB) and analyses the performance of the algorithm. It is found that under high SNR, the method is asymptotically unbiased,...
Previous attempts to investigate the effects of antispastic medications are limited to clinical studies using that use clinical evaluations to assess. Since these measures are neither objective nor quantitative, the therapeutic effects of such medications on neuromuscular properties have not been fully evaluated. In this study, as a first attempt, we examined the effect of tizanidine, an anti-spastic...
This study was to quantify the effects of Lokomat training on ambulation capacity of patients with incomplete spinal cord injury (SCI), and to examine the potential assistance of anti-spasticity medication on training. Twenty-nine SCI subjects with spastic hypertonia at their ankle participated in a 12-session Lokomat training regimen, with half receiving Lokomat only (LOKO) and half receiving Lokomat...
Over the past decade, the PV industry has witnessed tremendous growth in manufacturing scale and technology advancement, with PV generated electricity cost ever approaching grid parity. Among them, amorphous Si based thin film technology has made substantial progress in demonstrating its inherent advantages in lower material cost, ease of manufacturing and higher energy yield, etc. More recently,...
Our objectives were to explore the effects of robotic-orthosis (LOKOMAT) training on walking impairment recovery in subjects with incomplete spinal cord injury (SCI), and to develop robust predictors of these recovery patterns. Twelve SCI subjects with different degrees of ankle spasticity participated in a 12-session LOKOMAT training regimen. One-hour gait training sessions were provided three times...
To explore the effect of LOKOMAT and LOKOMAT+Tizanidine on the improvement of walking capacity for people with spinal cord injury (SCI), 20 SCI subjects with hypertonia spasticity at their ankle joints participated in a 12-session Lokomat training; among them, 10 subjects received Tizanidine. 1-hour LOKOMAT training was provided 3 times per week for 4-weeks. Subjects were evaluated 4 times for Timed-Up-and-Go,...
The light induced gap states with the key role in the instability of hydrogen diluted protocrystalline a-Si:H, similar to that currently used in high performance cells, have been identified and found not to be the midgap states. Such states, which have been associated with the creation of dangling bonds, have for a long time been considered to be solely responsible for the Staebler-Wronski Effect...
Critical infrastructures require precise and swift response to a local disturbance before it would spread and accumulate. To meet the demand on response time, we propose an intelligent controller with cache design. The controller stores previous decisions and rates them based on a comprehensive evaluation. With those ratings, the controller can intelligently choose the decision leading to the optimum...
Center-surround spatiotemporal (ST) filter is a powerful tool to simulate the spatial and temporal properties of retina ganglion cells and encode visual information with electric spikes. This paper introduces the application of particle swarm optimization (PSO) algorithm to tune the parameters in the retina model consisting of a ST filter module and a back-propagation (BP) neural network module. Images...
For vehicle navigation, Global Positioning System (GPS) provides long term accurate measurements, but only when a direct line of sight to four or more satellites exists. Inertial navigation systems (INS), on the other hand, are self contained sensors that can provide short term measurements. The integration of the two systems can effectively provide continuous navigation data even during GPS signal...
This paper reviews present compact model development and outlines the main features of the PUNSIM, an advanced surface potential-based MOSFET model. The PUNSIM is developed to overcome mainly drawbacks of the traditional surface potential based models and aiming at fulfilling the features: The first-principle derivation of the complete MOSFET surface potential equation; Physics based analytic solution...
A stability bound for linear continuous systems subject to nonlinear perturbations is derived. This bound guarantees that systems being simulated using two-step integrators remain stable under such perturbations. A numerical example is used to illustrate the effect of the sampling time on the bound
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