Results 291 to 300 of about 741,076 (339)

Coherence, conservation and patch‐occupancy analysis

Oikos, 2012
Spatial coherence (synchrony) among subpopulations poses a danger to the metacommunity, as it increases the risk of regional extinction. When this effect is significant, the use of inference techniques based on the stochastic patch occupancy model (SPOM) may be inadequate, since SPOMs assume that each habitat patch is either occupied or empty, thereby ...
Yossi Ben‐Zion, Nadav M. Shnerb
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AVO Analysis by Patch Template Correlation

65th EAGE Conference & Exhibition, 2003
E-25 AVO ANALYSIS BY PATCH TEMPLATE CORRELATION 1 Abstract Amplitude variation with offset (or angle of incidence) measurements (AVO) usually are interpreted in terms of Zoeppritz reflection coefficients a plane wave and sharp plane interface concept. In this paper we provide a generalization that deals with more complicated situations.
N. Norouzian, G.F. West
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Analysis of electromagnetically coupled patch antennas

Microwave and Optical Technology Letters, 1993
AbstractA spectral domain full‐wave analysis is given for a class of electromagnetically coupled patch antennas with cylindrical geometries. Numerical results on the input impedances of the stacked circular disks and the ring‐loaded circular disk are in good agreement with published results in the literature. © 1993 John Wiley & Sons, Inc.
Zhibo Fan, Kai‐Fong Lee
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Transect‐based patch size frequency analysis

Journal of Vegetation Science, 1997
Abstract.A new, transect‐based patch size detection method for species pattern is proposed which improves results obtained with methods described earlier. The method was tested on an extensive artificial data set together with three of the existing methods considered best: Two and Three Term Local Quadrat Variance (T2LQV and T3LQV) and New Local ...
Dai Xiaobing, Eddy van der Maarel
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Finite Element Analysis of Patched Cracks

Journal of Structural Mechanics, 1979
ABSTRACT A finite element method for analyzing the behavior of cracks in metal sheets which are patched with an overlay of composite material is described. The analysis includes the separate responses of the sheet, composite patch, and adhesive. Debonding of the adhesive is permitted and the stress intensity factor at the crack tip is obtained as well ...
R. Jones, R.J. Callinan
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Toward wearable patch for sweat analysis

Sensors and Actuators B: Chemical, 2016
Abstract This work presents an inexpensive and disposable miniaturized electrochemical sensing platform, which was fabricated on a polyethylene terephthalate substrate for continuously monitoring the ion composition of sweat. The sweat patch consisted of an area for sweat collection, integrated reference electrode and an array of screen printed AgCl ...
V.A.T. Dam, M.A.G. Zevenbergen, R. van Schaijk   +2 more
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Characteristic modes analysis for patch antenna

2017 IEEE Asia Pacific Microwave Conference (APMC), 2017
This paper shows a characteristic modes analysis for patch antenna. Characteristic modes analysis (CMA) solves scattering and radiation problems of metals approximately by using eigenvalue equations. Characteristic modes have the useful property of being orthogonal on the metal surface.
Masashi Yamamoto, Hiroyuki Arai
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Theoretical analysis of crack patching

1988
The development of high-strength fibres and adhesives has made it possible to repair cracked metallic plates (for example, cracked portions of an aircraft’s fuselage) by bonding reinforcing patches to the plate over the crack. The process is referred to as crack patching, and several repairs using this procedure are documented in Chapter 6, Section 7 ...
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Eigenvector analysis of microstrip patch antennas

IEEE Antennas and Propagation Society International Symposium 1992 Digest, 1992
Microstrip patch antennas are resonant antennas which are usually operated near a natural frequency. For isolated patch antennas which have simple geometries, the surface current distributions in the vicinity of these natural frequencies are, for the most part, known (or can be accurately approximated).
H.K. Smith, J.R. Mosig, P.E. Mayes
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Numerical analysis of microstrip patch antennas

1989
In this chapter, microstrip patch antennas are thin and lightweight radiating elements, formed by a substrate, including one or several dielectric layers, backed by a metallic sheet (the ground plane). Thin metallic patches (the radiating elements) are located on the air-substrate interface and, possibly, between the dielectric layers.
J. R. Mosig, R. C. Hall, F. E. Gardiol
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