Rapid determination of uranium and plutonium content in mixtures through measurement of the intensity–time curve of delayed neutrons

2004 ◽  
Vol 215 (1-2) ◽  
pp. 246-251 ◽  
Author(s):  
X. Li ◽  
R. Henkelmann ◽  
F. Baumgärtner
Keyword(s):  
Rapid Determination ◽  
Time Curve ◽  
Delayed Neutrons

scholarly journals Calculation of permeability coefficient of coal seam under rapid measurement conditions

2019 ◽  
Vol 136 ◽  
pp. 04004
Author(s):  
Manzheng Yang ◽  
Bingrui Li ◽  
Shubo Li
Keyword(s):  
Coal Seam ◽  
Permeability Coefficient ◽  
Integral Transformation ◽  
Gas Permeability ◽  
Rapid Determination ◽  
Flow State ◽  
Time Curve ◽  
Pressure Time ◽  
The Relationship

In order to achieve rapid determination of coal seam permeability, the calculation method of coal seam permeability coefficient was studied. Based on the Darcy's law in the flow of gas in the coal seam, the relationship equation between the gas pressure of the borehole and the gas permeability coefficient of the coal seam is established under the radial unsteady flow state. The gas permeability coefficient of the coal seam is obtained by coordinate transformation and integral transformation. Solve the expression. The analysis and verification of the field measured data show that the expression of the analytical solution of the coal seam permeability coefficient is consistent with the variation of the borehole pressure-time curve, which can provide a theoretical basis for the rapid determination of coal seam permeability.

Weak Beam Imaging and Diffraction Studies of Stacking Faults in Silicon

1976 ◽  
Vol 34 ◽  
pp. 590-591
Author(s):  
T. Y. Tan ◽  
W. K. Tice
Keyword(s):  
Fast Neutron ◽  
Rapid Determination ◽  
Stacking Faults ◽  
Imaging Method ◽  
Large Reduction ◽  
Dislocation Loops ◽  
Fringe Spacing ◽  
Weak Beam ◽  
Kinematical Theory

In studying ion implanted semiconductors and fast neutron irradiated metals, the need for characterizing small dislocation loops having diameters of a few hundred angstrom units usually arises. The weak beam imaging method is a powerful technique for analyzing these loops. Because of the large reduction in stacking fault (SF) fringe spacing at large sg, this method allows for a rapid determination of whether the loop is faulted, and, hence, whether it is a perfect or a Frank partial loop. This method was first used by Bicknell to image small faulted loops in boron implanted silicon. He explained the fringe spacing by kinematical theory, i.e., ≃l/(Sg) in the fault fringe in depth oscillation. The fault image contrast formation mechanism is, however, really more complicated.

Methods for rapid determination of pecan (Carya illinoensis) seed viability

2017 ◽  
Vol 45 (2) ◽  
pp. 455-464
Author(s):  
T.T. Xue ◽  
J. Liu ◽  
Y.B. Shen ◽  
G.Q. Liu
Keyword(s):  
Rapid Determination ◽  
Seed Viability ◽  
Carya Illinoensis
Sign in / Sign up

Export Citation Format

Share Document