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1.
I. A. Bol'shakov 《Journal of Mathematical Sciences》1991,56(1):2263-2279
Systems for automatic detection and correction of spelling errors in natural language texts are considered. The development of such systems for both English and Russian (and for inflected languages in general, including all Slavic languages) is discussed. An approach associated with morphological analysis of the wordforms in the given text is described. The topics considered in the paper include the main methods of automatic spelling correction, levels of automation of the spelling error correction process, the effect of the type of computer used, the use of spelling error correctors in a stand-alone mode and in combination with word-processing software, and the maintenance of auxiliary dictionaries.Translated from Itogi Nauki i Tekhniki, Seriya Teoriya Veroyatnostei, Matematicheskaya Statistika, Teoreticheskaya Kibernetika, Vol. 28, pp. 111–139, 1988. 相似文献
2.
Xianglei Mao Alexander A. Bol'shakov Inhee Choi Christopher P. McKay Dale L. Perry Osman Sorkhabi Richard E. Russo 《Spectrochimica Acta Part B: Atomic Spectroscopy》2011,66(11-12):767-775
The experimental details are reported of Laser Ablation Molecular Isotopic Spectrometry (LAMIS) and its application for performing optical isotopic analysis of solid strontium-containing samples in ambient atmospheric air at normal pressure. The LAMIS detection method is described for strontium isotopes from samples of various chemical and isotopic compositions. The results demonstrate spectrally resolved measurements of the three individual 86Sr, 87Sr, and 88Sr isotopes that are quantified using multivariate calibration of spectra. The observed isotopic shifts are consistent with those calculated theoretically. The measured spectra of diatomic oxide and halides of strontium generated in laser ablation plasmas demonstrate the isotopic resolution and capability of LAMIS. In particular, emission spectra of SrO and SrF molecular radicals provided clean and well resolved spectral signatures for the naturally occurring strontium isotopes. A possibility is discussed of using LAMIS of strontium isotopes for radiogenic age determination. 相似文献
3.
A. P. Bol'shakov N. N. Gerdyukov E. V. Zotov G. B. Krasovskii S. A. Novikov V. A. Sinitsyn M. A. Balakshina Yu. I. Shcherbak 《Journal of Applied Mechanics and Technical Physics》1998,39(6):955-958
The present paper reports results of analysis of the strength and strain properties of birth wood at different loading rates,
sample temperatures, and angles of orientation of fibers relative to the direction of loading. Dynamic tests (v=10 m/sec) with axial compression of the samples were conducted by the Kol'skii method on a setup with a Hopkinson compound rod. Noticeable
dynamic strengthening of samples with angles of orientation of fibers α=0 and 5° was observed. At test temperatures +65, +20,
and −30°C, the dynamic strength is higher than the quasistatic strength by approximately 23, 31, and 42% respectively.
Institute of Experimental Physics, Sarov 607190. Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 39, No.
6, pp. 154–158, November–December, 1998. 相似文献
4.
Xianglei Mao Alexander A. Bol'shakov Dale L. Perry Osman Sorkhabi Richard E. Russo 《Spectrochimica Acta Part B: Atomic Spectroscopy》2011,66(8):604-609
Laser Ablation Molecular Isotopic Spectrometry (LAMIS) was recently reported for optical isotopic analysis of condensed samples in ambient air and at ambient pressure. LAMIS utilizes molecular emissions which exhibit larger isotopic spectral shits than in atomic transitions. For boron monoxide 10BO and 11BO, the isotopic shifts extend from 114 cm−1 (0.74 nm) to 145–238 cm−1 (5–8 nm) at the B2Σ+ (v = 0) → X2Σ+ (v = 2) and A2Πi (v = 0) → X2Σ+ (v = 3) transitions, respectively. These molecular isotopic shifts are over two orders of magnitude larger than the maximum isotopic shift of approximately 0.6 cm−1 in atomic boron. This paper describes how boron isotope abundance can be quantitatively determined using LAMIS and how atomic, ionic, and molecular optical emission develops in a plasma emanating from laser ablation of solid samples with various boron isotopic composition. We demonstrate that requirements for spectral resolution of the measurement system can be significantly relaxed when the isotopic abundance ratio is determined using chemometric analysis of spectra. Sensitivity can be improved by using a second slightly delayed laser pulse arriving into an expanding plume created by the first ablation pulse. 相似文献
5.
The kinetics of azobenzene nitrene oxidation by molecular oxygen dissolved in a matrix was studied in glassy propylene carbonate. The reaction was carried out in excess oxygen within its concentration range 0.008 to 0.048 M. The oxidation kinetics, controlled by oxygen diffusion, is not described by the exponential function. A specific reaction rate decreases in the course of the process. The higher the oxygen concentration in the matrix, the sharper is the decrease in the reaction rate. It is shown that at all concentrations, the oxidation kinetics is described in the framework of the model of heterogeneous matrix with a characteristic size of heterogeneities of 1.5 nm and a dispersion of the activation energy of oxygen molecule jump of 4 kJ/mol. The reaction radius is about 0.5 nm. 相似文献
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7.
The reaction C2H5 + O2 → C2H5O2 in glassy methanol-d4 and the H-atom abstraction by CH3, C2H5, and n-C4H9 radicals in C2H5OH + C2D5OH and CD3CH2OH + C2D5OH glassy mixtures have been studied by electron spin resonance. The analysis of the dependence of the reaction rates on the concentration of O2 (oxidation) and C2H5OH, CD3CH2OH (H-atom abstraction) has shown that the √t law is not conditioned by the existence of regions characterized by different rate constants. 相似文献
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9.
El Khatib M Elagawany M Jabeen F Todadze E Bol'shakov O Oliferenko A Khelashvili L el-Feky SA Asiri A Katritzky AR 《Organic & biomolecular chemistry》2012,10(25):4836-4838
Chemical ligation via O- to N-acyl transfer of O-acylated serine containing peptides affords serine containing native peptides via 8- and 11-membered cyclic transition states opening the door to a wide variety of potential applications to peptide elaboration. The feasibility of these traceless chemical ligations is feasible as supported by computation. 相似文献
10.
Bol'shakov M. N. Klimova N. V. Rudaya L. I. Yurre T. A. Shamanin V. V. Skorokhodov S. S. 《Russian Journal of Organic Chemistry》2002,38(10):1540-1541
Russian Journal of Organic Chemistry - 相似文献