scholarly journals Timescale and spatial distribution of local plastic events in a two-dimensional microfluidic crystal

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Ya Gai ◽  
Alison Bick ◽  
Sindy K. Y. Tang
Keyword(s):  
Spatial Distribution ◽  
Two Dimensional ◽  
Local Plastic

Application of coherent four-wave mixing for two-dimensional mapping of the spatial distribution of excited atoms in a laser-produced plasma

1997 ◽  
Vol 140 (4-6) ◽  
pp. 259-265 ◽  
Author(s):  
D.A. Akimov ◽  
A.B. Fedotov ◽  
N.I. Koroteev ◽  
A.N. Naumov ◽  
D.A. Sidorov-Biryukov ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Two Dimensional ◽  
Excited Atoms ◽  
Laser Produced Plasma ◽  
Dimensional Mapping

Two-dimensional Markov Chain Simulation of Soil Type Spatial Distribution

2004 ◽  
Vol 68 (5) ◽  
pp. 1479-1490 ◽  
Author(s):  
Weidong Li ◽  
Chuanrong Zhang ◽  
James E. Burt ◽  
A.-Xing Zhu ◽  
Jan Feyen
Keyword(s):  
Spatial Distribution ◽  
Markov Chain ◽  
Soil Type ◽  
Two Dimensional

A Spatial Resolution of Residual Stress Measurements Using the Deep Hole Drilling Technique

2010 ◽  
Author(s):  
Alexandros Skouras ◽  
Martyn J. Pavier ◽  
Anton Shterenlikht
Keyword(s):  
Residual Stress ◽  
Spatial Distribution ◽  
Element Model ◽  
High Accuracy ◽  
Metal Plate ◽  
Hole Drilling ◽  
Two Dimensional ◽  
Deep Hole ◽  
Drilling Technique ◽  
Dimensional Finite Element

This paper describes a study of the ability of the DHD technique to measure the spatial distribution of residual stresses. A two dimensional finite element model of a metal plate has been generated together with a representative state of residual stress. A simulation of the DHD technique is then carried out to provide a series of measurements of the residual stress which can be compared with the known residual stress. This simulation allows the effect of the varying trepan diameters on the accuracy of the DHD technique to be explored. The results of the simulation show that the DHD technique can be used to measure residual stress with a high accuracy, but the increase in the trepan diameter introduce some errors. Suggestions and techniques for reducing these errors are presented.

High Resolution Synchrotron X-Ray Diffraction Tomography Of Large-Grained Samples

1996 ◽  
Vol 437 ◽  
Author(s):  
D.P. Piotrowski ◽  
S.R. Stock ◽  
A. Guvenilir ◽  
J.D. Haase ◽  
Z.U. Rek
Keyword(s):  
Spatial Distribution ◽  
High Resolution ◽  
Three Dimensional ◽  
Polycrystalline Materials ◽  
Diffraction Tomography ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Image Storage ◽  
X Ray ◽  
Dimensional Distribution

AbstractIn order to understand the macroscopic response of polycrystalline structural materials to loading, it is frequently essential to know the spatial distribution of strain as well as the variation of micro-texture on the scale of 100 μm. The methods must be nondestructive, however, if the three-dimensional evolution of strain is to be studied. This paper describes an approach to high resolution synchrotron x-ray diffraction tomography of polycrystalline materials. Results from model samples of randomly-packed, millimeter-sized pieces of Si wafers and of similarly sized single-crystal Al blocks have been obtained which indicate that polychromatic beams collimated to 30 μm diameter can be used to determine the depth of diffracting volume elements within ± 70 μm. The variation in the two-dimensional distribution of diffracted intensity with changing sample to detector separation is recorded on image storage plates and used to infer the depth of diffracting volume elements.

ACCEPTOR-RELATED RADIATIVE RECOMBINATION OF QUASI-TWO-DIMENSIONAL ELECTRONS IN MODULATION-DOPED GaAs/AlxGa1−xAs HETEROJUNCTIONS

1996 ◽  
Vol 10 (08) ◽  
pp. 323-328
Author(s):  
S.J. CHUA ◽  
S.J. XU ◽  
X.H. TANG
Keyword(s):  
Spatial Distribution ◽  
Temperature Change ◽  
Line Shape ◽  
Radiative Recombination ◽  
Blue Shift ◽  
Rapid Decrease ◽  
Low Energy ◽  
Two Dimensional ◽  
Band Bending

The radiative recombination of quasi-two-dimensional electrons with photoexcited holes bound to acceptors is investigated in modulation-doped GaAs / Al x Ga 1–x As heterojunctions. With increase in temperature, a blue shift of about 2.5 meV is observed for a temperature change from 4 K to 40 K. Also, observed is a rapid decrease in intensity of its low energy peaks. This change in line shape of the acceptor-related emission in the GaAs / Al x Ga 1–x As heterojunctions is accounted for by the effect of band bending and the spatial distribution of acceptors.

Spatial distribution of sardine (Sardinops sagax) eggs and larvae: an application of geostatistics and resampling to survey data

1999 ◽  
Vol 56 (6) ◽  
pp. 907-914 ◽  
Author(s):  
W J Fletcher ◽  
Neil R Sumner
Keyword(s):  
Spatial Distribution ◽  
Survey Data ◽  
Ordinary Kriging ◽  
Sampling Design ◽  
Optimal Sampling ◽  
Bootstrap Resampling ◽  
Two Dimensional ◽  
Optimal Sampling Design ◽  
Sardinops Sagax ◽  
Eggs And Larvae

The abundance of eggs and larvae of sardine (pilchard) (Sardinops sagax) off the south coast of Western Australia was investigated using geostatistical and bootstrap resampling techniques. A two-dimensional correlogram showed that the patch of newly spawned pilchard eggs had dimensions of 8 nautical miles (M) in diameter in the offshore direction and 10 M in the alongshore direction. For older stages, the size of the patch tended to increase and the level of cohesion decrease. It was more difficult to determine the size of the patch from directional variograms. The abundance of 1- and 2-day-old eggs in the study area was estimated using ordinary kriging. A bootstrapping analysis suggested that the optimal sampling design for day 1 eggs should use 4 × 10 M grids, an increase in intensity on the 5 × 15 M grids used in previous surveys.

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