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1.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleshechkin A.M., Aleshechkin A.M.
Заглавие : Algorithm for determining attitude of objects using GNSS signals
Коллективы : Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2011 (30 May 2011 through 1 June 2011, ) Conference code: 109063
Место публикации : 18th Saint Petersburg International Conference on Integrated Navigation Systems, ICINS 2011 - Proceedings. - 2011. - С. 365-374. - ISBN 9785919950042 (ISBN)
Ключевые слова (''Своб.индексиров.''): ambiguity--phase--satellite radionavigation systems--algorithms--maximum likelihood--navigation systems--radio navigation--ambiguity--ambiguity resolution--angular orientation--gnss signals--phase--research and development--satellite radionavigation--sorting method--global positioning system
Аннотация: In this report the results of research and development of the algorithm for determining the objects angular orientation using the GLONASS and GPS signals are given. The results of evaluation of the correct ambiguity resolution probability are presented to determine the angular orientation using the sorting method with the selection of the optimim combination of integral ambiguities by the criterion of maximum likelihood. Unlike the known algorithms, in the propose method along with determining angular orientation the distance between the antennas of the object is estimated. Furthermore, the results of experimental studies of the proposed method are discussed.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nikiforov A. A., Krylov A. S., Krylova S. N., Gorshkov V. S., Pelegov D. V.
Заглавие : Temperature Raman study of Li4Ti5O12 and ambiguity in the number of its bands
Колич.характеристики :10 с
Место публикации : J. Raman Spectrosc. - 2024. - Vol. 55, Is. 3. - P.406-415. - ISSN 03770486 (ISSN), DOI 10.1002/jrs.6641. - ISSN 10974555 (eISSN)
Примечания : Cited References: 51. - The research was funded by the Russian Science Foundation (project No 22-22-00350, https://rscf.ru/project/22-22-00350)
Аннотация: The two primary physical methods for identifying lithium titanate, a negative electrode material used commercially, are X-Ray diffraction and Raman spectroscopy. Although there are many publications on this topic, they are focused mainly on chemistry, so there are still some points that require clarification from a physical and methodological point of view. Difference of experimentally observed and theoretically predicted Raman spectra was explained through a combination of experiments and computations. The work comprises experiments and computations to explain why there are different numbers of predicted and observed Raman-active bands. Our low-temperature study and the analysis of thermal shifts during heating led us to conclude that the approach with surplus bands is advantageous and we recommend using major F2g band shifts to estimate the sample heating.
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