Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Delta filter

How does one extract eigenpairs from Chebyshev vectors One possibility is to use the spectral method. The commonly used version of the spectral method is based on the time-energy conjugacy and extracts energy domain properties from those in the time domain.145,146 In particular, the energy wave function, obtained by applying the spectral density, or Dirac delta filter operator (8(E — H)), onto an arbitrary initial wave function ( (f)(0)))1 ... [Pg.310]

Apart from the delta filter discussed here, one can define other filters using the same Chebyshev operators. In fact, any analytic function of the Hamiltonian can be expressed as an expansion in terms of the Chebyshev operator.148 For instance, the Green filter can be expressed as follows 126,127 149... [Pg.312]

Indeed, the Green filter and the delta filter operator are related ... [Pg.313]

To illustrate the LSFD idea, we note that for the delta filter (Eq. [62]), the matrix elements can be written as... [Pg.317]

Suciu R., Constantinescu A., David C., 2002, The Danube Delta Filter or bypass for the nutrient input into the Black Sea , Large Rivers Vol. id, No. 1-2, p 165-173. [Pg.64]

In an HT system, either the star is not grounded or it is a delta-connected system and hence the third harmonic is mostly absent, while the content of the. second harmonic nuiy be too small to be of any significance. For this purpose, where harmonic analysis is not possible, or for a new installation where the content of harmonies is not known, it is common practice to use a series reactor of 6% of the reactive value of the capacitors installed. This will suppress most of the harmonics by making the circuit inductive, up to almost the fourth harmonic, as derived subsequently. Where, however, second harmonics are significant, the circuit may be tuned for just below the second harmonic. To arrive at a more accurate choice of filters, it is better to conduct a harmonic analysis of the system through a harmonic analyser and ascertain the actual harmonic quantities and their magnitudes present in the system, and provide a correct series or parallel filter-circuits for each harmonic. [Pg.745]

The kernel K(x,x — y) must satisfy this constraint for any integrable function (p. This is just the definition of the Dirac delta function K(x, x — y) = S(x — y). Note that, in this limit, the kernel function is equivalent to the filter function used in LES. As is well known in LES, filtering a function twice leads to different results unless the integral condition given above is satisfied. [Pg.368]

The terms in the nutrient balance of a riparian wetland are essentially the same as those in a traditional wetland ricefleld in a river floodplain or delta, though of course the magnitudes differ. Inputs are delivered along the stream course as dissolved material and sediment, and in lateral runoff from neighbouring upland dissolved and particulate material is filtered, absorbed, adsorbed and variously transformed in the wetland, and flows out in runoff and percolation. [Pg.211]

Methoxy-delta-6-Dehydro-10,16-Dioxoisomorphinan. One g of the above phenanthrene and 200 mg of copper chromite are suspended in 30 cc of absolute aleohol and redueed in an autoclave at 144-150° with 25 atmospheres hydrogen pressure (cold, before heating, thats where pressure was set) for 4 hours. The cooled reaction mixture is decolorized with Norit, filtered, and concentrated. Pale, yellow prismatic needles (585 mg) are separated. This step can be accomplished in larger scale at the expense of the yield. [Pg.93]

Hydroxy-N-Methylisomorphinan. 24 mg of the 3-hydroxy-delta-6-dehydro-N-methyl-morphan is hydrogenated over 5 mg of Adams catalyst in 15 cc of dcohol. H2 uptake is complete after 35 min. The solution is filtered, concentrated, and the residue is ciystallized from benzene to yield 24 mg of colorless fine prisms. [Pg.93]

Instead of performing the homomorphic filtering operation independently on the three color bands, one can transform the image into the coordinate system used by the human visual system and then filter the image in this space. After filtering, the transformation into the coordinate system used by the human visual system can be undone. Note that this method works only if we assume that we have receptors that are similar to delta... [Pg.174]

Basically, when integrating the product of a function and the Dirac delta function, the Dirac delta function acts like a filter, resulting in the value of that function evaluated at the point where the Dirac delta function is applied. [Pg.516]

Figure 2 Effect of pertussis toxin treatment on the regulation of basal [35S]GTP-yS binding by (2S,3R)TMT-L-Tic in hDOR/CHO cell membranes. Chinese hamster ovary cells stably expressing the human delta opioid receptors (hDOR/CHO) were treated in the presence ( ) or absence ( ) of 50 ng/mL pertussis toxin for 18 h. The cells were washed and cell membranes prepared as previously described [40]. Membranes were incubated with appropriate concentrations of (2S,3R)TMT-L-Tic in the presence of 0.1 nM [35S]GTPyS (1,250 Ci/mmol) in 1.0 mL of assay buffer (25 mM Tris, 150 mM NaCl, 50 iM GDP, 2.5 mM MgCl2, 1 mM EDTA, 30 pM bestatin, 10 pM captopril, pH = 7.4). After 90 min incubation at 30°C, the reaction was terminated by rapid filtration. The filters were washed with 25 mM Tris/120 mM NaCl, pH 7.4, and bound radioactivity was measured by liquid scintillation spectrophotometry. Figure 2 Effect of pertussis toxin treatment on the regulation of basal [35S]GTP-yS binding by (2S,3R)TMT-L-Tic in hDOR/CHO cell membranes. Chinese hamster ovary cells stably expressing the human delta opioid receptors (hDOR/CHO) were treated in the presence ( ) or absence ( ) of 50 ng/mL pertussis toxin for 18 h. The cells were washed and cell membranes prepared as previously described [40]. Membranes were incubated with appropriate concentrations of (2S,3R)TMT-L-Tic in the presence of 0.1 nM [35S]GTPyS (1,250 Ci/mmol) in 1.0 mL of assay buffer (25 mM Tris, 150 mM NaCl, 50 iM GDP, 2.5 mM MgCl2, 1 mM EDTA, 30 pM bestatin, 10 pM captopril, pH = 7.4). After 90 min incubation at 30°C, the reaction was terminated by rapid filtration. The filters were washed with 25 mM Tris/120 mM NaCl, pH 7.4, and bound radioactivity was measured by liquid scintillation spectrophotometry.
Macias-Machin, A., and Santana, D. F., Calculate Delta P of a Fixed-Bed Filter, Chemical Engineering, September 1998, pp. 159-162. [Pg.501]

For fluorescein angiography a properly equipped fundus camera must have a high-intensity flash system combined with a rapid recycle time, power winding, appropriate excitation filters (the Baird Atomic B2 470 or Kodak Wratten 47), and barrier filters (an Ilford 1109 Delta Chromatic 3 or Kodak Wratten G15).Both excitation and... [Pg.617]

Mathematically the bandlimited data can be introduced by filtering the theoretical signals. We consider, for example, the effect of this filtering on a delta-function. There is a well-known integral representation for a delta-function ... [Pg.479]


See other pages where Delta filter is mentioned: [Pg.311]    [Pg.313]    [Pg.317]    [Pg.311]    [Pg.313]    [Pg.317]    [Pg.746]    [Pg.804]    [Pg.180]    [Pg.471]    [Pg.132]    [Pg.55]    [Pg.298]    [Pg.62]    [Pg.212]    [Pg.311]    [Pg.314]    [Pg.93]    [Pg.344]    [Pg.347]    [Pg.76]    [Pg.102]    [Pg.163]    [Pg.88]    [Pg.70]    [Pg.155]    [Pg.401]    [Pg.677]    [Pg.265]    [Pg.266]    [Pg.190]    [Pg.218]    [Pg.199]    [Pg.480]    [Pg.65]    [Pg.78]   
See also in sourсe #XX -- [ Pg.312 , Pg.317 ]




SEARCH



Delta

© 2024 chempedia.info