A New Finding of a Docodontan (Mammaliaformes,Docodonta) in the Lower Cretaceous of Western Siberia     

Lopatin  A. V.  Averianov  A. O.  Kuzmin  I. T.  Boitsova  E. A.  Saburov  P. G.  Ivantsov  S. V.  Skutschas  P. P. 《Doklady Earth Sciences》2020,494(1):667-669

Doklady Earth Sciences - The first finding of the docodontan (a lower molar of Sibirotherium sp.) from the Bol’shoi Kemchug 3 locality (Ilek Formation, Lower Cretaceous) in Krasnoyarsk...  相似文献   

Composition of Cosmic Rays with <Emphasis Type="Italic">E</Emphasis><Superscript>0</Superscript> ⩾ 10<Superscript>17</Superscript> eV Based on Data from the Ground Scintillation Detectors of the Yakutsk EAS Array     

A. V. Glushkov  M. I. Pravdin  A. V. Saburov 《Astronomy Letters》2018,44(10):588-592

The lateral distribution of cascade particles in extensive air showers from cosmic rays with energy E⁰ ? 10¹⁷ eV has been studied at the Yakutsk array by the ground scintillation detectors over the period of continuous observations 1977–2017. The experimental data are compared with those computed with various models for the development of extensive air showers from the CORSIKA software package. The best agreement between the theory and experiment is observed for the QGSjet-01-d model. In the energy range (1?20)× 10¹⁷ eV there is a change in the cosmic-raymass composition from 〈lnA〉 ≈ 2.5 to the proton one.  相似文献   

Structure of the Basic Software and Hardware Complex of the System for Seismometric Monitoring of the Technical Condition of Buildings and Structures     

E. P. Zolotukhin  A. P. Kuzmenko  V. D. Neskorodev  A. V. Komarov  V. S. Saburov  D. B. Korolenko 《Seismic Instruments》2018,54(2):134-143

The objective of the present study is to design a basic software and hardware complex (SHC) of a seismometric monitoring system for buildings and structures recommended for serial production. To do this, the authors used modern methods and principles of designing software and hardware systems. The system is methodologically based on the engineering-seismometric method. This method uses recording of spatial vibrations of an object as a result of microseisms of natural and anthropogenic origin. Next, dynamic and elastic characteristics of the structure are determined by vibrations that make it possible to evaluate its technical condition. As a result of conducted studies, the authors defined the main technical and functional requirements for the monitoring system for a wide range of applications. A three-level structure of a modular technical condition monitoring system is proposed for discussion. This structure makes it possible to create an extensible open system in which the number of measuring channels can be easily increased by increasing the number of plugin standard modules. In addition, the system can both record seismic events, earthquakes, and perform seismometric monitoring by microseisms. In order to represent the main processes and structure of the proposed basic complex of the system in the case of its full operation, the authors developed a functional model of the system. The model is based on a data flow diagram that describes the processes of collecting, processing, storing, analyzing, and presenting seismometric monitoring data. The functioning of the proposed complex is briefly described. The input data of the complex are the vibrations of the structure recorded at observation points using three-component geophones. Then, the seismic signal recorder collects, amplifies, digitizes, and transmits data to the server. The server either records seismic events and then evaluates their impact on the structure or carries out a planned recording of microseisms in order to monitor the technical condition of the structure and stores vibration data in the corresponding files. If an earthquake is detected, the system notifies the responsible personnel. Records of microseisms are used by the data processing software to compute the statistical parameters of vibrations and complex transfer functions according to the spectra of which the operator manually selects the values of natural frequencies. Seismic monitoring data processing software evaluates elastic characteristics by a number of natural frequencies using a mathematical design model of the structure vibrations. On the basis of the analysis of the change in the obtained dynamic and elastic characteristics and taking into account the effect of external factors, the software generates information for monitoring the technical condition of the structure. These results, as well as data of the evaluation of the event impact on the structure, are the output data of the system.  相似文献