نتایج جستجو برای: spectroscopy fourier transform infrared

تعداد نتایج: 360719  

A. Bamoniri, B. F. Mirjalili, S. M. Nezamalhosseini

The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy-disper...

Journal: :Optics express 2015
Julien Réhault Francesco Crisafi Vikas Kumar Gustavo Ciardi Marco Marangoni Giulio Cerullo Dario Polli

We propose a new approach to broadband Stimulated Raman Scattering (SRS) spectroscopy and microscopy based on time-domain Fourier transform (FT) detection of the stimulated Raman gain (SRG) spectrum. We generate two phase-locked replicas of the Stokes pulse after the sample using a passive birefringent interferometer and measure by the FT technique both the Stokes and the SRG spectra. Our appro...

Journal: :International Journal of Molecular Sciences 2021

2009
Rossen Ivanov

Integrable equations with second order Lax pair like KdV and CamassaHolm (CH) exhibit interesting conformal properties and can be written in terms of the so-called conformal invariants (Schwarz form). These properties for the CH hierarchy are discussed in this contribution. The squared eigenfunctions of the spectral problem, associated to the Camassa-Holm equation represent a complete basis of ...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2002
Lisa A Poyneer Donald T Gavel James M Brase

Wave-front reconstruction with the use of the fast Fourier transform (FFT) and spatial filtering is shown to be computationally tractable and sufficiently accurate for use in large Shack-Hartmann-based adaptive optics systems (up to at least 10,000 actuators). This method is significantly faster than, and can have noise propagation comparable with that of, traditional vector-matrix-multiply rec...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2011
jagannath roy narayan bandyopadhyay santanu das saikat maitra

al2o3-sio2 diphasic gel was synthesized by sol gel route from aluminium nitrate and silicic acid following aqueous phase colloidal interaction. the precursor gel powder was thoroughly characterized by chemical analysis, measurement of surface area and bulk density measurement. the gel powder was further characterized by thermogravimetry, xrd diffraction study of the heat treated samples and sca...

2014
Hui Li Zhanzhan Zhang

Quantum image recognition is a technology by using quantum algorithm to process the image information. It can obtain better effect than classical algorithm. In this paper, four different quantum algorithms are used in the three stages of palmprint recognition. First, quantum adaptive median filtering algorithm is presented in palmprint filtering processing. Quantum filtering algorithm can get a...

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