Geodesic
Observability of oscillations of a network from the connected objects with the distributed and concentrated parameters in a point of connection
Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ, no. 1 (2011), pp. 142-146

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The problem restoration of an initial condition of a network is solved. Networks are consisting from $m$ objects with the distributed parameters, which have an object with concentrated parameters in the point of connection. Initial data are restored by the results of supervision for tension of strings in the point of their connection.
Keywords: wave equation, regional problem, elastic oscillations, controllability, clearing of oscillations. 
@article{VSPUI_2011_1_a12,
     author = {A. I. Egorov and L. N. Znamenskaya},
     title = {Observability of oscillations of a network from the connected objects with the distributed and concentrated parameters in a point of connection},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {142--146},
     publisher = {mathdoc},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2011_1_a12/}
}
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A. I. Egorov; L. N. Znamenskaya. Observability of oscillations of a network from the connected objects with the distributed and concentrated parameters in a point of connection. Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ, no. 1 (2011), pp. 142-146. http://geodesic.mathdoc.fr/item/VSPUI_2011_1_a12/