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We study biorthogonal bases of compactly supported wavelets constructed from box splines in ℝ
N
with any integer dilation factor. For a suitable class of box splines we write explicitly dual low-pass filters of arbitrarily
high regularity and indicate how to construct the corresponding high-pass filters (primal and dual).
Received: August 23, 2000; in final form: March 10, 2001?Published online: May 29, 2002 相似文献
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A framework for the numerical analysis of bridges under wind excitation is outlined. It is based on structural finite element
scheme and cross-sectional wind load models. Two aspects are investigated: (1) how considering the mean steady configuration
in the aerodynamic stability calculation; and (2) the effects of load nonlinearities on structural response. A quasi-steady
load model is adopted, which is able to deal with the considered problems by using experimental data easily available in the
practice. By means of numerical examples, it is pointed out (1) that both the modifications in structural tangential stiffness
and in the aerodynamic coefficients due to the mean steady deformation may affect the aeroelastic stability threshold and
(2) that load linearization may produce an underestimation of the structural response. 相似文献
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Salvatori Mdel R Abou-Jneid R Ghoulami S Martin MT Zaparucha A Al-Mourabit A 《The Journal of organic chemistry》2005,70(20):8208-8211
[Chemical reaction: see text] Various substituted 2-aminotetrahydroazolopyridines and 2-aminohexahydroazolopyridines have been prepared by bromine-mediated addition of protected guanidine or urea to hydropyridine derivatives. The pH-dependent regioselective cleavage of the resulting aminal function led to the 2-aminoazole products III. The yields of the bicycles of type II, and their conversion into azoles III depends on the electronic properties of the substituents on the nitrogen of the tetrahydopyridine. 相似文献
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Pitois A de las Heras LA Zampolli A Menichetti L Carlos R Lazzerini G Cionini L Salvatori PA Betti M 《Analytical and bioanalytical chemistry》2006,384(3):751-760
Boron neutron capture therapy (BNCT) is a bimodal radiotherapeutic treatment based on the irradiation of neoplastic tissues
with neutrons after the tissues have selectively accumulated molecules loaded with nuclides with large neutron capture cross-sections
(such boron-10). Boron-10 carriers have been tested to a limited extent, and clinical trials have been conducted on sulfhydryl
borane (10B-BSH) and boronophenylalanine (10B-BPA). However, precise and accurate measurements of boron-10 concentrations (0.1–100 μg/g) in specimens and samples of limited
size (μg scale) are needed in order to be able to biologically characterise new compounds in predictive tissue dosimetry,
toxicology and pharmacology studies as well as in clinical investigations. A new approach based on fast separation and detection
of 10B-BPA performed by coupling capillary electrophoresis to electrospray mass spectrometry is reported. This method allows the
quantitative analysis and characterisation of 10B-BPA in a short time with a high separation efficiency. Detection limits of 3 μM for 10B-BPA and 30 ng/mL for 10B were obtained with CE–ESI–MS. A quantification limit of 10 μM for 10B-BPA (100 ng/mL for 10B) was attained. The total boron-10 concentration was determined by high-resolution inductively coupled mass spectrometry
in order to validate the method. Boron-10 isotope measurements were carried out by HR–ICP–MS at medium resolution (R=4000)
due to the presence of an isobaric interference at mass 10. Good agreement was obtained between the values from CE–ESI–MS
and those from HR–ICP–MS. The method has been successfully used to determine the 10B-BPA in two lines of cultured cells. 相似文献
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S. Salvatori 《Analytical and bioanalytical chemistry》1894,33(1):618-619
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M. C. Rossi S. Salvatori F. Scrimizzi F. Galluzzi R. Janssen M. Stutzmann 《Journal of luminescence》1998,80(1-4):405-409
Electrical and optoelectronic characterization of p–i–n devices based on a-SiOx : H thin film alloys is presented. It is shown that near infrared electroluminescence can be obtained for applied fields higher than a typical threshold depending on the p/i and n/i interface structure. Electroluminescence (EL) intensity under AC excitation is independent of frequency up to 20 kHz and exhibits rise and decay times of about 10 μs. Optical properties of a-SiOx : H materials allow the integration of LED devices and optical waveguides, which can be coupled to planar silicon detectors for obtaining Si-based optoelectronic circuits. 相似文献