|本期目录/Table of Contents|

[1]Markushev Dragan,Rabasovic Mihailo,Lukic Mladena Cojbasic Zarko,等. 实时脉冲光声法用于分子弛豫时间的测定[J].南京大学学报(自然科学),2013,49(1):5-12.[doi:10.13232/j.cnki.jnju.2013.01.019]
 Markushev Dragan,Rabasovic Mihailo,Lukic Mladena Cojbasic Zarko,et al. Real-time pulsed photoacoustics-molecular relaxation time measurements* [J].Journal of Nanjing University(Natural Sciences),2013,49(1):5-12.[doi:10.13232/j.cnki.jnju.2013.01.019]
点击复制

 实时脉冲光声法用于分子弛豫时间的测定()
     

《南京大学学报(自然科学)》[ISSN:0469-5097/CN:32-1169/N]

卷:
49
期数:
2013年第1期
页码:
5-12
栏目:
出版日期:
2013-01-30

文章信息/Info

Title:
 Real-time pulsed photoacoustics-molecular
relaxation time measurements*
作者:
 Markushev Dragan1Rabasovic Mihailo1Lukic Mladena2 Cojbasic Zarko3Todorovic Dragan4
 (1 .Institute of Physics,University of Belgrade,Pregrevica 118,Belgrade-Zcmun,Serbia;
2. Faculty of occupational safcty,Univcrsity of Nis,Carnojcvica 10 a, 18000 Nis,Serbia;
3. Mechanical Engineering Faculty, University of Nis,Aleksandra Medvedeva 14,18000 Nis,Serbia;
4.Institute for Multidisciplinary Research,Univcrsity of Belgrade,P.O.Box 33,11030 Belgrade,Serbia)
Author(s):
 Markushev Dragan1Rabasovic Mihailo1Lukic Mladena2 Cojbasic Zarko3Todorovic Dragan4
 (1 .Institute of Physics,University of Belgrade,Pregrevica 118,Belgrade-Zcmun,Serbia;
2. Faculty of occupational safcty,Univcrsity of Nis,Carnojcvica 10 a, 18000 Nis,Serbia;
3. Mechanical Engineering Faculty, University of Nis,Aleksandra Medvedeva 14,18000 Nis,Serbia;
4.Institute for Multidisciplinary Research,Univcrsity of Belgrade,P.O.Box 33,11030 Belgrade,Serbia)
关键词:
 光声光谱激光光束空间分布振动一平动弛橡时间神经网络遗传算法
Keywords:
 photoacoustic spectroscopy laser beam profile vibrational-to-translational relaxation time neural net-worksgenctic algorithms
分类号:
-
DOI:
10.13232/j.cnki.jnju.2013.01.019
文献标志码:
-
摘要:
脉冲光声光谱法一个重要的应用是确定气体分子的振动一平动弛橡时间τv-T.因激光光束
的空间分布R(r)对光声测量有显著影响,我们发展了同时测定R(r)和τv一T的方法.本方法基于光声
脉冲的实时信号和一种用于光声成像的数学运算法则.本文讨论了智能计算用于多原子气体分子的R
(r)和τv一T同时和实时测定的可能性.进一步利用前馈多层神经网络的离线批训练法,结合一个理论光
声信号对R(r)和τv一T进行了同时和实时分析.木方法可明显缩短确定上述参数所需时间.
Abstract:
 Determination of the vibrational-to-translational relaxation time τv-T  in gases is one of the applications of
pulsed photoacoustic spectroscopy. Because the spatial profile of the laser beam R(r),can significantly influence the
accuracy of the photoacoustic mcasurements,we developed the method for simultaneous determination of the R(r),
and τv-T,.It is based on the temporal shape of the photoacoustic pulse and utilizes a mathematical algorithm devel
opcd for photoacoustic tomography.The possibilities of computational intelligence application for simultaneous and
real-time determination of R(r)and τv-T values of polyatomic molecules in gases by pulsed photoacoustic  are also
discussed. Feed forward multilayer perception networks are trained in an offlinc batch training regime to estimate
simultancously,and in real-time,R(r),(profile shape class)and τv-T,from a givcn(thcorctical)photoacoustic signals.
Proposed method significantly shortens the time required for the simultaneous determination of the aforementioned  quantities.

参考文献/References:

[1]Sigrist M W. Trace gas monitoring by laser photoa- coustic spectroscopy and related techniques. Review
of Scientific lnstruments,2003,74 ,486一490.
[2]Markushev D D,Jovanovic-Kurepa J,Terzic M. Exci- tation dynamics during the multiphoton absorption in
SF6+buffer-gas mixtures. Journal of Quantitative Spectroscopy and Radiative Zi-ansfer,2003,76:85 -99.
[3]Rabasovic M D, Markushcv D D, Jovanovic K J. Pulsed photoacoustic system calibration for highly
excited molecules. Measurement Science and Tech- nology , 2006,17:1826一1837.
[4]Mallidi S, Emclianov S. Photoacoustic technique to measure beam profile of pulsed laser systems.
Review of Scientific lnstruments,2009,80,054901.
[5]Rabasovic M D, Nikolic J D, Markushev D D. Simul- taneous determination of the spatial profile of the
laser beam and vibrational-to-translational relaxation time by pulsed photoacoustics. Applied Physics B, 2007,88:309一315.
[6]Rabasovic M D, Nikolic J D Markushev D D. Pulsed photoacoustic system calibration for highly excited
molecules;II. influence of the laser beam profile and the excitation energy decay. Measurement Science
and Technology,2006,17;2938一2944.
[7]Xu M, Wang L V.Time-domain reconstruction for thermoacoustic tomography in a spherical geometry.
IEEE Transactions on Medical Imaging, 2002,21: 814一822.
[8]Wang X, Xu Y, Xu M, et al. Photoacoustic tomo- graphy of biological tissues with high cross-section
resolution; reconstruction and experiment. Medical Physics,2002,29;2799一2805.
[9]Rabasovic M D, Markushev D D. Laser beam spatial profile determination by pulsed photoacoustics; exact
solution. Measurement Science and Technology,2010,21:065603.
[10]Dreyfus G. Neural networks;mcthodology and appli canons. Birkhauscr-Springer,2005.
[11]Hagan M T,Demuth H B. Beale M H. Neural Network Design. Boston,MA;PWS Publishing, 1996.
[12]Lazic D, Cojbasic Z, Ristanovic M. Fazi-neuro- genetsko upravljanje acrokrila. Facta Univcrsitatis-
Series Automatic Control and Robotics, 2011,10 (1):71一82.
[13]Moller M F. A scaled conjugate gradient algorithm for fast supervised learning. Neural Networks,1993,6:525一533.
[14]Cojbasic Z,Nikolic V,Ciric 1. Computationally intel- ligent modeling and control of fluidized bed combus-
tion process.Thermal Science, 2011,15(2):321 ~338.


相似文献/References:

备注/Memo

备注/Memo:
 Ministry of Education and Science o1 the Republic of Serbia(171016,TR035016)
更新日期/Last Update: 2015-10-16