Une pure merveille !
Un roman d'une grande beauté, drôle, fin, extrêmement lumineux sur des sujets difficiles : la perte de
l'être aimé, la dureté de la vie et la tristesse qu'on barricade parfois... Elise franco-japonaise,
orpheline de sa maman veut poser LA question à son père et elle en trouvera le courage au fil des pages,
grâce au retour de sa grand-mère du japon, de sa rencontre avec son extravagante amie Stella..
Ensemble il ne diront plus Sayonara mais Mata Ne !
Fourier transform spectroscopy has evolved into an analytic spectroscopic method with applications throughout the physical, chemical, and biological sciences....
Lire la suite
Livré chez vous entre le 2 octobre et le 8 octobre
En librairie
Résumé
Fourier transform spectroscopy has evolved into an analytic spectroscopic method with applications throughout the physical, chemical, and biological sciences. As instruments have become automated and computerized, users have been able to focus on their experiments and not on the operation of their instruments. However, in many applications where source conditions are not ideal or the desired signal is weak, the success of an experiment can depend critically on understanding the instrument and the data-processing algorithms that extract the spectrum from the interferogram. Fourier Transform Spectrometry provides essential background in Fourier analysis, systematically develops the fundamental concepts governing the design and
operation of Fourier transform spectrometers, and illustrates every concept pictorially. Methods for transforming the interferogram and phase correcting the resulting spectrum are presented, with a focus on understanding the capabilities and limitations of the algorithms. Techniques of computerized spectrum analysis are discussed in a way that enables spectroscopists to understand the numerical processing algorithms without becoming computer programmers. Methods for determining the accuracy of numerical algorithms are detailed and compared pictorially and quantitatively. Algorithms for line finding, fitting spectra to voigtian profiles, filtering, Fourier transforming, and spectrum synthesis are a basis for spectrum analysis tools from which complex signal-processing procedures can be constructed.
This book is of immediate value to those who use Fourier transform spectrometers in their research or are considering their use. It gives the mathematical and physical background for understanding the operation of an ideal interferometer, illustrates those ideas with example interferograms obtained via ideal and nonideal interferometers, and shows how the maximum amount of information can be extracted from the interferograms. Finally, it shows how sampling and noise affect the spectrum.
Sommaire
Why Choose a Fourier Transform Spectrometer ? Theory of the Ideal Instrument
Fourier Analysis
Nonideal (Real-World) Interferograms
Working with Digital Spectra and Fourier Transforms
Phase Corrections and Their Significance
Effects of Noise in Its Various Forms
Line Positions, Line Profiles, and Fitting
Processing of Spectral Data
Discussions, Interventions, Digressions, and Obscurations