Deconvolution technique

To improve URT, we used a deconvolution technique. Our enhancement procedure is based on Papoulis deconvolution i.e. on an extension of the generalized inversion in the complementary bandwidth of the electro-acoustic set-up. 

Gugliotta, L. M., Vega, J. R., and Meira, G. R., Instrumental broadening correction in size exclusion chromatography. Comparison of several deconvolution techniques, /. Liq. Chromatogr., 13,1671, 1990. 

If we consider only a few of the general requirements for the ideal polymer/additive analysis techniques (e.g. no matrix interferences, quantitative), then it is obvious that the choice is much restricted. Elements of the ideal method might include LD and MS, with reference to CRMs. Laser desorption and REMPI-MS are moving closest to direct selective sampling tandem mass spectrometry is supreme in identification. Direct-probe MS may yield accurate masses and concentrations of the components contained in the polymeric material. Selective sample preparation, efficient separation, selective detection, mass spectrometry and chemometric deconvolution techniques are complementary rather than competitive techniques. For elemental analysis, LA-ICP-ToFMS scores high. 

The relatively poor resolution of the XPS systems has lead to an extensive use of deconvolution techniques in order to prove the presence of shifted core levels of low intensity in the presence of unshifted levels (thin oxide layers on metal substrates). Deconvolution techniques should be used only in those cases where the presence of multi components is shown up by a shoulder in the intensity distribution. Interpretation of asymmetric peaks in terms of chemical shifts can be misleading in some cases because the asymmetry may change due to a change of the electron population at the Fermi level as was demonstrated for the metallic oxide Ir02 [23, 24],... 

The uia of a nuaerical analysis of voltaaaograas with a praciaa deconvolution technique of the adeorption state (23.24) and the coaparison of resulting data with hard sphere aodels of the stepped surfaces in nuaber of cases allows an understanding of the interfacial processes at the atoaic level of the working surface, in the presence of the electrolyte. 

Deconvolution technique, 14 237 Decoration, gold, 12 693-694, 703 Decorative cosmetics, 7 860-862 Decorative laminates, phenolic resins in, 18 789-790... 

If the calorimeter could respond instantaneously to the heat effects associated with the addition of titrant, then the measured curve would coincide with the dashed lines in figure 11.5. The deviation of the data from this ideal behavior corresponds to periods in which the isothermal condition is not observed. When necessary, however, it is possible to use deconvolution techniques to generate the input function represented by the dashed line from the observed experimental curve. 

Due to the high coherence of electron source in an FEG electron microscope, the information resolution limit of an image can reach the atomic level, much higher than the point resolution. However, the stmcture information, especially those in the high-resolution region, is seriously distorted due to the strong oscillation of the CTF. The distortion can be removed by the image deconvolution technique. 

In the present paper, the crystal structure of Ndi ssCcq i5Cu04. has been studied by maximum entropy image deconvolution in combination with image simulation. This work is focused on demonstrating the effectiveness of image deconvolution technique rather than determining the structure itself... 

The fact that all deconvoluted images given in the middle row of Fig. 3 are very similar to one another in contrast and all metallic atoms are resolved as black dots with correct positions denotes that the image deconvolution technique is powerful to transform the image taken at an arbitrary defocus into the structure image. It is for the first time to clarify that the deconvoluted images still reveal the projected structure even if some reflections fall in the vicinity of zero cross of CTF. 

Bodenhausen ° developed a pattern-recognition programme (MARCO POLO) in order to extract coupling pathways in COSY spectra. He subsequently described a recursive deconvolution technique for the measurement of couplings, but this seems to offer more benefits to the measurement of scalar couplings in two-dimensional spectra than in one-dimensional spectra. 

UV/vis Electronic transitions Commonest detector for HPLC. Not very structurally informative Sensitive lack of specificity usually requires deconvolution techniques... 

Methods that have been developed for the solution of the Fredholm equation sometimes rely on continuous functional representations of s(x — x ) and i(x). These methods are limited in usefulness for the experimentalist, who wishes to apply deconvolution techniques by computer to digitized spectra. 

To place the discussions of this and the following chapter in a clear context, we describe a specific system model. Application discussions may be seen in the light of a specific instrument. To use deconvolution techniques effectively, the instrument as well as the data acquired must be analytically well characterized. 

When recording and processing a spectrum, several considerations must be kept in mind if deconvolution techniques are to produce optimum results. Noise is the foremost consideration and has been considered in some detail in Section III. Among the several other considerations of lesser importance that also have impact on the deconvolved spectrum is the appropriateness of the response function used in deconvolving a recorded spectrum as discussed in detail in Chapter 1. The accuracy with which the 0 and 100% absorption levels are determined can also affect the deconvolved spectrum. Also, because a spectrum must be digitized before it can be computer processed, the number of bits used in the digitization must also be considered. 

Peak purity is based on the proprietary spectral contrast algorithm, which converts spectral data into vectors that are used to compare spectra mathematically. This comparison is expressed as a purity angle that is compared to the purity threshold. Spectral deconvolution techniques are used when two peaks coelute. 

Another problem is quantitative analysis of a multicomponent mixture, because we have to take into account the fact that only a small fraction of the components will appear as isolated peaks, in spite of using extremely efficient columns. For this reason, different deconvolution techniques have been elaborated. 

P.J.M. Smulders, A deconvolution technique with smooth non-negative results, Nucl. Instr. Meth. B14 (1986) 234-239. 

Figure 8 shows a very simple transition curve determined by a high sensitivity DSC. For many proteins much more complex thermograms are obtained. By different deconvolution techniques, the experimental curves can be resolved into several peaks which may be linked to the transition of different cooperative regions in the protein (see Privalov (1989)). 

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