نتایج جستجو برای: imperfection

تعداد نتایج: 1601  

2016
Lean Yu Shouyang Wang

Neural network ensemble learning has been turned out to be an efficient strategy for achieving high performance, especially in fields where the development of a powerful single learning system requires considerable efforts (Lai et al., 2006, Yu et al., 2007, 2008b). Usually, neural network ensemble learning model outperforms the individual neural network models, whose performance is limited by ...

Journal: :Journal of magnetic resonance 2003
Natala Ivchenko Colan E Hughes Malcolm H Levitt

Cogwheel phase-cycling schemes are applied to sideband suppression and sideband separation experiments in solid-state NMR. It is shown that cogwheel phase cycles lead to the elimination of most pulse imperfection effects, while using far fewer experimental signal acquisitions than conventional phase-cycling methods.

2007
John W. Hutchinson

I Buckling and postbuckling behavior under axial compression is analyzed for a long circular cylinder containing an axisymmetric imperfection. Bifurcation I stresses are investigated for all possible modes, both periodic and aperiodic, and postbuckling analysis reveals that bifurcation is not always associated with a loss of load-carrying capacity. The results provide some theoretical foundatio...

Journal: :Physical review letters 2003
M Terraneo D L Shepelyansky

We study analytically and numerically the effects of various imperfections in a quantum computation of a simple dynamical model based on the quantum wavelet transform. The results for fidelity time scales, obtained for a large range of error amplitudes and number of qubits, imply that for static imperfections the threshold for fault-tolerant quantum computation is decreased by a few orders of m...

2002
Peter Kiss Vladimir I. Prodanov Jack P. F. Glas

Zero-if transceivers suffer from the imbalance of the I and Q paths. By using a complex low-pass filter topology instead of a conventional pair of real low-pass filters, this imperfection can be reduced. Both analytical and numerical analysis show that the proposed technique is significantly more robust to circuit imperfections than the traditional architecture.

2011
Malay Kumar Kundu Arpan Kumar Maiti

Reference points play important role in the field of fingerprint recognition. It is mainly used for fingerprint classification and fingerprint matching. There are many methods proposed for fingerprint reference point detection like Poincare Index technique, Direction curvature technique etc. The purpose of this paper is to detect the reference points considering the uncertainty for imperfection...

2001
E. BOUSCAREN

We consider the groups which are infinitely definable in separably closed fields of finite degree of imperfection. We prove in particular that no new definable groups arise in this way: we show that any group definable in such a field L is definably isomorphic to the group of L-rational points of an algebraic group defined over L.

2014
Navid Amini Zohreh Karimi

Because the PUF taps into the random variation during an IC fabrication process, the secret is extremely difficult to predict or extract and thus in terms of five following characteristics they are more powerful than RFIDs: 1) Unpredictability 2) Resiliency against reverse engineering 3) Stability against voltage variations 4) stability against imperfection of arbiters 5) Resiliency against dig...

Journal: :IEICE Transactions 2005
Masaji Tomita Tomio Sakashita Yoshio Karasawa

1.Introduction In this paper, a new method based on the modematching method in the sense of least squares [1], [2] for analyzing the two dimensional scattering problem of plane wave incidence to the infinite plane surface with an arbitrary imperfection of finite extent. The semi-infinite upper and lower regions of that surface are a vacuum and a perfect conductor, respectively. For this problem...

Journal: :Latin American Journal of Solids and Structures 2021

Abstract The influence of single and multiple imperfection cases on the load carrying capacity mild steel cone subjected to axial compression was considered through numerical simulation in current paper. Three different techniques were considered, which are: i) uneven length (sinusoidal/square waves), ii) crack, iii) indentation (SLI) imperfection. Abaqus 6.19 FE used carry out simulation. comp...

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