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Applied theory of bending vibration of the piezoelectric and piezomagnetic bimorph

Journal of Advanced Dielectrics 2020年第3期10卷 72-76页

作者： Do Thanh Binh V.A.Chebanenko Le Van Duong e.kirillova Pham Manh Thang A.N.Soloviev Department of Theoretical and Applied Mechanics Don State Technical University No.1 Gagarin sq.Rostov-on-Don 344000Russia Southern Scientific Center of RAS No.41 Chekhov AvenueRostov-on-Don 344006Russia Department of Construction Machinery Le Quy Don Technical University No.236 Hoang Quoc Viet str.Hanoi 100000Vietnam RheinMain University of Applied Sciences Kurt-Schumacher-Ring 18 Wiesbaden 65197Germany Department of engineering Mechanics and Automation Vietnam National University No.144 Xuan Thuy str.Hanoi 100000Vietnam Institute of Mathematics Mechanics and Computer Sciences Southern Federal UniversityNo.8AMilchakova St.Rostov-on-Don 344090Russia

Based on the variational principle,equations and boundary conditions for transverse steady vibrations of a bimorph consisting of a piezoelectric and piezomagnetic layers are *** results of calculations of natural freq... 详细信息

关键词： energy harvesting piezoelectrics piezomagnetics applied theory

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ecological and habitat ranges of orchids in the northernmost regions of their distribution areas:A case study from Ural Mountains,Russia

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Plant Diversity 2023年第2期45卷 211-218页

作者： Irina A.kirillova Yuriy A.Dubrovskiy Svetlana V.Degteva Alexander B.Novakovskiy Institute of Biology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences 28 Kommunisticheskaya St.167982SyktyvkarKomi RepublicRussia

The Orchidaceae,which is one of the most interesting families of angiosperms,contains a large number of rare *** their acknowledged importance,little attention has been paid to the study of orchids distributed in northern *** this study,we determined the syntaxonomical diversity and ecological parameters of orchid habitats in two of europe's largest protected areas,the Pechoro-Ilychsky Reserve and the Yugyd Va National Park(northeastern european Russia),and then compared our findings to those in other parts of orchid distribution *** this purpose,we studied 345 descriptions of plant communities(releves) containing species from Orchidaceae and defined habitat parameters using ellenberg indicator values with the community weight mean approach,nonmetric multidimensional scaling(NMS),and relative niche *** found that orchids were distributed in eight habitat types and 97 plant *** largest number of orchid species is found in forest *** of the orchid species under study occur in the mires and rock habitats with open *** orchids consistently occur in areas disturbed by human *** addition,our study indicates that the main drivers of orchid distribution across the vegetation types are light and soil *** analysis of the ecological parameters of orchid habitats indicates that some orchid species can be classified as habitat specialists that are confined to a relatively narrow ecological niche in the Urals(e.g.,Goodyera repens,Cypripedium guttatum and Dactylorhiza maculata).Several other species(*** cordata and Dactylorhiza fuchsia) grow under diverse ecological parameters.

关键词： Orchidaceae Plant communities Nature protected areas Community weight mean Illumination Moisture

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