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排序方式: 共有98条查询结果,搜索用时 15 毫秒
41.
Rowlands-Rees TP Kamperidis C Kneip S Gonsalves AJ Mangles SP Gallacher JG Brunetti E Ibbotson T Murphy CD Foster PS Streeter MJ Budde F Norreys PA Jaroszynski DA Krushelnick K Najmudin Z Hooker SM 《Physical review letters》2008,100(10):105005
The generation of quasimonoenergetic electron beams, with energies up to 200 MeV, by a laser-plasma accelerator driven in a hydrogen-filled capillary discharge waveguide is investigated. Injection and acceleration of electrons is found to depend sensitively on the delay between the onset of the discharge current and the arrival of the laser pulse. A comparison of spectroscopic and interferometric measurements suggests that injection is assisted by laser ionization of atoms or ions within the channel. 相似文献
42.
Shouche M. S. Petersen J. N. Skeen R. S. Hooker B. S. 《Applied biochemistry and biotechnology》1994,45(1):775-785
Applied Biochemistry and Biotechnology - The success ofin situ biological contaminant destruction depends on the distribution of microorganisms through a flow field. Using numerical tools, a... 相似文献
43.
44.
Dhar S. Schaaf P. Bibić N. Hooker E. Milosavljević M. Lieb K.P. 《Applied Physics A: Materials Science & Processing》2003,76(5):773-780
Applied Physics A - Silicide formation and ion beam mixing of Fe/Si bilayers due to Ar-, Xe- and Au-ion irradiations at room and liquid-nitrogen temperatures were investigated. For the study of... 相似文献
45.
Jennings David A. Petersen James N. Skeen Rodney S. Hooker Brian S. Peyton Brent M. Johnstone Donald L. Yonge David R. 《Applied biochemistry and biotechnology》1995,(1):727-734
The high nutrient concentrations that would exist near the nutrient injection well during the application of cometabolicin situ bioremediation may lead to the development of significant quantities of biomass at this point in the subsurface. This biomass
can decrease the porosity of the soil to such an extent that nutrient injection is no longer possible. In this work, experiments
were conducted using a porous media biofilm reactor, operated under constant substrate loading conditions, such that the pressure
drop across the reactor was allowed to increase to maintain a constant volumetric flow rate through the reactor. Results suggest
that biomass production, and hence biofilm thickness, near the injection feed port is highly sensitive to substrate loading.
In addition, these variations in biofilm thickness produce dramatic differences in the pressure drop that is attained across
the reactor. Use of the Kozeny-Carman equation can be used to predict that once a critical depth has been exceeded, the pressure
drop across the bed will increase exponentially within biofilm depth. This result means that pressure is not a reliable indicator
of the onset of pore plugging. 相似文献
46.
John W Hooker William T Patula 《Journal of Mathematical Analysis and Applications》1981,82(2):451-462
Oscillation and comparison theorems for a linear homogeneous second-order difference equation are proved by employing various equivalent non-linear equations obtained by means of transformations analogous to the Riccati transformation for ordinary differential equations. 相似文献
47.
John W. Hooker 《Journal of Difference Equations and Applications》2013,19(2):219-225
In this expository paper we discuss some instances in which analogues which might be expected between the behavior of solutions of differential equations and difference equations fail to hold, focussing particularly on questions related to boundedness and oscillation. 相似文献
48.
49.
E. Börnstein Samuel C. Hooker und D. Lindo 《Fresenius' Journal of Analytical Chemistry》1889,28(1):352-353
Ohne Zusammenfassung 相似文献
50.