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101.
Antonín??ernoch Jan?Soubusta Miloslav?Du?ek Jaromír?Fiurá?ek 《Journal of Russian Laser Research》2009,30(5):533-539
We report on a linear-optical realization of a universal quantum device working with polarization encoded quantum bits. It
can serve as a two-qubit partial SWAP entangling gate. The same device can be used also for filtering symmetric and antisymmetric
parts of the input two-photon state. Through a partial symmetrization, the universal asymmetric quantum cloning of single-photon
polarization states can be achieved. All functions can be implemented in one setup by changing the classical parameters like
the phase shift and attenuation only. For the characterization of the device, the reconstruction of the output state by full
process tomography was performed. 相似文献
102.
Jakub Vaněk Přemysl Lubal Romana Ševčíková Miloslav Polášek Petr Hermann 《Journal of luminescence》2012,132(8):2030-2035
The mono(pyridine-N-oxide) analog of the H4dota macrocylic ligand, H3do3a-pyNO, is capable of forming thermodynamically stable and kinetically inert Ln(III) complexes. Its Eu(III) and Tb(III) complexes display a strong long-lived fluorescence as a result of the antenna effect of the pyridine-N-oxide fluorophore in the reagent. It is shown that H3do3a-pyNO can be used as a fluorogenic reagent for the determination of Eu(III) and Tb(III) at pH 6.5 and cL=1 mM. At an excitation wavelength of 286 nm, the emission maxima are 615 nm (Eu(III)-complex), and 547 nm (Tb(III)complex). Detection limits are at concentrations around 1.0 μM and linearity of the method spans over 2 orders of magnitude. The method was applied to artificial and real samples (spiked mineral waters, extracts from cathode ray tube luminophore dust) and gave satisfactory results. The method is simple, rapid, and hardly interfered by other metal ions. 相似文献
103.
104.
Stepan Stehlik Tomas Kohoutek Miloslav Frumar Toru Hara Kazuyuki Ueda 《Journal of solid state chemistry》2010,183(1):144-149
This article describes the preparation of multi-walled carbon nanotube—chalcogenide glass composite by direct synthesis and the melt-quenching method. The carbon nanotubes—chalcogenide glass composite was characterized by high-resolution transmission electron microscopy (HRTEM), TEM/energy-dispersive X-ray spectroscopy, low energy electron excited X-ray spectroscopy, Raman spectroscopy, spectroscopic ellipsometry, microhardness, and impedance spectroscopy. CNTs-AgAsS2 glass composite possess highly increased ionic conductivity, from σ25 °C=4.38±0.0438×10−6 to σ25 °C=6.57±0.0657×10−6 S cm−1 and decreased refractive index from n=2.652 to 2.631 at the wavelength λ=1.55 μm. 相似文献
105.
Miloslav Feistauer Anna‐Margarete Sändig 《Numerical Methods for Partial Differential Equations》2012,28(4):1124-1151
Error estimates for DGFE solutions are well investigated if one assumes that the exact solution is sufficiently regular. In this article, we consider a Dirichlet and a mixed boundary value problem for a linear elliptic equation in a polygon. It is well known that the first derivatives of the solutions develop singularities near reentrant corner points or points where the boundary conditions change. On the basis of the regularity results formulated in Sobolev–Slobodetskii spaces and weighted spaces of Kondratiev type, we prove error estimates of higher order for DGFE solutions using a suitable graded mesh refinement near boundary singular points. The main tools are as follows: regularity investigation for the exact solution relying on general results for elliptic boundary value problems, error analysis for the interpolation in Sobolev–Slobodetskii spaces, and error estimates for DGFE solutions on special graded refined meshes combined with estimates in weighted Sobolev spaces. Our main result is that there exist a local grading of the mesh and a piecewise interpolation by polynoms of higher degree such that we will get the same order O (hα) of approximation as in the smooth case. © 2011 Wiley Periodicals, Inc. Numer Mehods Partial Differential Eq, 2012 相似文献
106.
O. Mestek Miloslav Suchánek Richard Koplík Hana Fingerová Eva urdová 《Fresenius' Journal of Analytical Chemistry》1999,364(3):203-207
Uncertainty is an important quality parameter of any analytical result. Estimating the uncertainty of analytical procedures
can be rather difficult in many instances. Computer simulation based on multiple repetition of calculation of the resulting
quantity while varying slightly the input parameters is an alternative option. The input parameters for the various computation
runs are composed of two terms: the constant mean value and the error, obtained as the product of the standard uncertainty
of the parameter in question and a random number with the normal distribution N(0.1). This approach can also serve to optimize
measuring procedures, as demonstrated on an example of the determination of lead in biological materials by isotope dilution
mass spectrometry. The accuracy of the optimized method was tested by analysis of some CRMs, the robustness of the method
was examined, and the detection limit (10 ng/g Pb) and repeatability (4 ng/g Pb) were determined.
Received: 30 September 1998 / Revised: 3 December 1998 / Accepted: 8 December 1998 相似文献
107.
Monika Poláková Du?an Joniak Miloslav ?uri? 《Monatshefte für Chemie / Chemical Monthly》2000,5(5):1197-1205
Because of the low stability of the benzyl ester linkage in benzyl 1,2:3,5-di-O-benzylidene-α-D-glucofuranuronate during the removal of the benzylidene groups by acid hydrolysis and/or hydrogenolysis, 4-methoxybenzylidene groups were used to block the free hydroxyl groups of D-glucuronic acid. Several benzyl esters of D-glucuronic acid were prepared, and their relative rates of acid catalyzed hydrolysis were determined by liquid-chromatographic separation of the reaction mixture and subsequent diode array detection. 相似文献
108.
Tomáš Mackuľak Josef Prousek Miroslava Smolinská Petra Olejníková Alžbeta Takáčová Miloslav Drtil 《Chemical Papers》2013,67(12):1594-1598
Three priority pollutants, i.e. mono-, di-, and trichloroacetic acids, were degraded by the conventional Fenton AOP system (Fe2+ and H2O2). The results obtained suggest that the degradation decreased in the order: monochloroacetic, dichloroacetic, and trichloroacetic acid. The best of advanced oxidation processes (AOPs) for the degradation of trichloroacetic acid was reductive dechlorination with the use of zero-valent iron (Fe°). The results of Escherichia coli toxicity tests revealed that the reagents’ toxicity after the Fenton treatment process was decreased. 相似文献
109.
We contemplate the pair of the purely imaginary delta-function potentials on a finite interval with Dirichlet boundary conditions.
The two parameter model exhibits nicely the expected quantitative features of the unavoided level crossing and of a “phase-transition”
complexification of the energies. Combining analytic and numerical techniques we investigate strength- and position-dependence
of spectrum.
Presented at the 3rd International Workshop “Pseudo-Hermitian Hamiltonians in Quantum Physics”, Istanbul, Turkey, June 20–22,
2005. 相似文献
110.