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1. Sub- and supercritical water in the processes of conversion of Domanik rock organic matter

Author

Nasyrova Z.R., Kayukova G.P., Chemodanov A.E., and Vakhin A.V.

Subjects
Environmental sciences, GE1-350
Abstract

Studies on the conversion of organic matter of high-carbon Domanik (siliceous-clay carbonate) rock of the Romashkinskoye deposit with a mineral content Corg of 7.07% in sub- and supercritical water have been carried out. It was shown that subcritical water at a temperature of 320°С and 17.0 MPa leads to a partial decomposition of the kerogenic structure, increasing the yield of bitumen from 3.12 to 3.98%, and a more complete recovery of asphaltenes and heavy C22-C30 n-alkanes from the rock sample. Supercritical water at temperatures of 374 and 420°C and pressures above 24.4 MPa leads to intensive formation of hydrocarbon and inorganic gases in the processes of kerogen decomposition, destruction of aliphatic substituents from condensed heteroatomic structures of resins and asphaltenes, and the carbonate component of Domanik rock. Degradation of the organic matter of the Domanik rock is also accompanied by the formation of saturated hydrocarbons with an increased content of light C12-C21 n-alkanes, and carbonaceous substances, such as carbene-carboids. Changes in the structure of asphaltenes and their paramagnetic properties were determined by the EPR method. The influence of sub- and supercritical water on phase changes in the composition of rock minerals, as well as on the yield and composition of formed gases, was revealed.

Published
2021
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8. A Constrained Shortest Path Scheme for Virtual Network Service Management

Author

Chemodanov, Dmitrii, Esposito, Flavio, Calyam, Prasad, and Sukhov, Andrei

Subjects
Computer Science - Performance, Computer Science - Networking and Internet Architecture
Abstract

Virtual network services that span multiple data centers are important to support emerging data-intensive applications in fields such as bioinformatics and retail analytics. Successful virtual network service composition and maintenance requires flexible and scalable 'constrained shortest path management' both in the management plane for virtual network embedding (VNE) or network function virtualization service chaining (NFV-SC), as well as in the data plane for traffic engineering (TE). In this paper, we show analytically and empirically that leveraging constrained shortest paths within recent VNE, NFV-SC and TE algorithms can lead to network utilization gains (of up to 50%) and higher energy efficiency. The management of complex VNE, NFV-SC and TE algorithms can be, however, intractable for large scale substrate networks due to the NP-hardness of the constrained shortest path problem. To address such scalability challenges, we propose a novel, exact constrained shortest path algorithm viz., 'Neighborhoods Method' (NM). Our NM uses novel search space reduction techniques and has a theoretical quadratic speed-up making it practically faster (by an order of magnitude) than recent branch-and-bound exhaustive search solutions. Finally, we detail our NM-based SDN controller implementation in a real-world testbed to further validate practical NM benefits for virtual network services., Comment: Extended Technical Report for the IEEE Transactions on Network and Service Management submission

Published
2018

10. A General Constrained Shortest Path Approach for Virtual Path Embedding

Author

Chemodanov, Dmitrii, Calyam, Prasad, Esposito, Flavio, and Sukhov, Andrei

Subjects
Computer Science - Networking and Internet Architecture
Abstract

Network virtualization has become a fundamental technology to deliver services for emerging data-intensive applications in fields such as bioinformatics and retail analytics hosted at multi-data center scales. To create and maintain a successful virtual network service, the problem of generating a constrained path manifests both in the management plane with a physical path creation (chains of virtual network functions or virtual link embedding) and in the data plane with on-demand path adaptation (traffic steering with Service Level Objective (SLO) guarantees). In this paper, we define the virtual path embedding problem to subsume the virtual link embedding and the constrained traffic steering problems, and propose a new scheme to solve it optimally. Specifically, we introduce a novel algorithm viz., "Neighborhood Method" (NM) which provides an on-demand path with SLO guarantees while reducing expensive over provisioning. We show that by solving the Virtual Path Embedding problem in a set of diverse topology scenarios we gain up to 20% in network utilization, and up to 150% in energy efficiency, compared to the existing path embedding solutions., Comment: Technical Report prepared for Camera-Ready paper to appear at IEEE Conference on Local and Metropolitan Area Networks, 2016

Published
2016
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11. PANORAMA OF VENERA 9 AND 10 LANDING SITES

Author

FLORENSKIY, K. P., primary, BAZILEVSKIY, A. T., additional, BURBA, G. A., additional, NIKOLAYEVA, O. V., additional, PRONIN, A. A., additional, SELIVANOV, A. S., additional, NARAYEVA, M. K., additional, PANFILOV, A. S., additional, and CHEMODANOV, V. P., additional

Published
2022
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18. Multi-agent Control System of a Robot Group: Virtual and Physical Experiments

Author

Kozhemyakin, Igor, Semenov, Nickolay, Ryzhov, Vladimir, Chemodanov, Mikhail, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Ronzhin, Andrey, editor, Rigoll, Gerhard, editor, and Meshcheryakov, Roman, editor

Published
2019
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24. Fighting SARS-CoV-2 with green seaweed Ulva sp. extract: extraction protocol predetermines crude ulvan extract anti-SARS-CoV-2 inhibition properties in in vitro Vero-E6 cells assay

Author

Shai Shefer, Arthur Robin, Alexander Chemodanov, Mario Lebendiker, Robert Bostwick, Lynn Rasmussen, Michael Lishner, Michael Gozin, and Alexander Golberg

Subjects
SARS-CoV-2, Antiviral, Seaweed, Macroalgae, Sulfated polysaccharides, Ulva sp., Medicine, Biology (General), QH301-705.5
Abstract

Due to the global COVID-19 pandemic, there is a need to screen for novel compounds with antiviral activity against SARS-COV-2. Here we compared chemical composition and the in vitro anti- SARS-COV-2 activity of two different Ulva sp. crude ulvan extracts: one obtained by an HCl-based and another one by ammonium oxalate-based (AOx) extraction protocols. The composition of the crude extracts was analyzed and their antiviral activity was assessed in a cytopathic effect reduction assay using Vero E6 cells. We show that the extraction protocols have a significant impact on the chemical composition, anti- SARS-COV-2 activity, and cytotoxicity of these ulvan extracts. The ulvan extract based on the AOx protocol had a higher average molecular weight, higher charge, and 11.3-fold higher antiviral activity than HCl-based extract. Our results strongly suggest that further bioassay-guided investigation into bioactivity of compounds found in Ulva sp. ulvan extracts could lead to the discovery of novel anti-SARS-CoV-2 antivirals.

Published
2021
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27. The Model of Autonomous Unmanned Underwater Vehicles Interaction for Collaborative Missions

Author

Kozhemyakin, Igor, Putintsev, Ivan, Ryzhov, Vladimir, Semenov, Nikolay, Chemodanov, Mikhail, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Ronzhin, Andrey, editor, Rigoll, Gerhard, editor, and Meshcheryakov, Roman, editor

Published
2018
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28. Variation principle and the universal metric of dynamic routing

Author

Sukhov, A. M. and Chemodanov, D. Yu.

Subjects
Computer Science - Networking and Internet Architecture, 70G75, 94A99, C.2.2, C.4
Abstract

In this paper the variation principles from theoretical physics is considered that would describe the process of routing in computer networks. The total traffic which is currently served on all hops of the route has been chosen as the quantity to minimize. Universal metric function has been found for dynamic routing taking into account the packet loss effect. An attempt to derive the metric of the most popular dynamic routing protocols such as RIP, OSPF, EIGRP from universal metric was made., Comment: 4 pages, 3 figures, 14 equations

Published
2011
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29. Research of domanic source rock by pyrolytic gas chromatography-mass spectrometry method

Author

A.E. Chemodanov, B.I. Gareev, G.A. Batalin, and R.S. Gerasimov

Subjects
pirolysis, source rock, Py-GCMS, Bulk Rock, thermal maturity, Geology, QE1-996.5
Abstract

We applied new novel approach based on pyrolytic gas chromatography-mass spectrometry technology (Py-GCMS) developed by Frontier Lab company (Japan) in order to get the same data as it can be acquired by using conventional core analyzer. Experimental part describes the detailed measurement procedure, temperature program and outcomes acquired by using IFP 160000 as a standard sample. We have managed to demonstrate accuracy and reproducibility of tests for the domanic source rock samples and its kerogen extracted respectively. In results of this analytical challenge we were able to get pyrograms providing the S1 (free hydrocarbons), S2 (potential hydrocarbons), Tmax (temperature at which the maximum rate of hydrocarbon generation is reached) information with level of confidence we usually could see doing conventional core analyzer tests. Some important conclusions regarding petroleum generation and thermal maturity have been made. S1 and S2 significantly decrease for kerogen samples with Tmax growth at the same time. Moreover mass spectra data of core samples pyrolizates can be collected easily to detect certain groups of compounds. Sulfur-containing compounds temperature extracted by Py-GCMS can be measured for example. Py-GCMS technology fully comply with mainstream analytical protocol for whole-rock or kerogen analysis and even more, Py-GCMS has a lot of advantages against conventional approach providing us additional valuable information about a sample.

Published
2019
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30. Geochemical Modeling with the Use of Vertical and Horizontal Relative Concentrations of Oil Compounds for the Heavy Oil Fields

Author

Artyom Chemodanov, Vladislav Sudakov, Sergey Usmanov, Robert Akhmadullin, and Rinat Khayrtdinov

Subjects
sagd modeling, biodegradation of oil, beteroatomic compounds, isomers, oil-water transition zone, Petroleum refining. Petroleum products, TP690-692.5
Abstract

The purpose of this study is the detection of lateral and vertical gradients of relative concentrations of compounds presented in oil. In addition, the detection allows us to assess potential drainage zones in a reservoir during the reservoir production by steam injection. In this paper, a new method for monitoring of steam chamber development in a 2D model was created and tested. The methodology is used to consider the total hydrocarbon fraction. In addition, the total hydrocarbon fraction has been isolated from core extracts and has been analyzed by GCMS method (TIC) for detection of various compounds and assessment of lateral and vertical gradients of their concentration in lateral. It has been found out that the ratio of 4- and 1-methyldibenzothiophenes (MDBT) changes in lateral and in vertical directions. These changes are caused by biodegradation of organic matter. Also laboratory research shows that 1-MDBT/4-MDBT ratio in native reservoir rocks is stable under high temperatures and pressures and this can be easily measured by GC-MS. This measurement will allow assessment of location and direction of steam chamber propagation. In a recent work, the authors have developed a geochemical model which can be used for assessment of oil flow directions during the development of heavy oil fields by SAGD method.

Published
2018
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36. Open-Source Modular µAUV for Cooperative Missions

Author

Zanin, Vladislav, Kozhemyakin, Igor, Potekhin, Yuriy, Putintsev, Ivan, Ryzhov, Vladimir, Semenov, Nickolay, Chemodanov, Mikhail, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Ronzhin, Andrey, editor, Rigoll, Gerhard, editor, and Meshcheryakov, Roman, editor

Published
2017
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38. Basic conceptual scheme of the threshing and separating device of the flax fiber combing machine

Author

Yu. V. Burlakov, S. I. Chemodanov, and S. V. Burlakovа

Subjects
Forestry, Plant Science
Abstract

Harvesting of flax for fiber and seed production is carried out depending on the specific conditions by different technologies: direct, separate and factory. A technical and technological study of separate harvesting of flax fiber by improving the basic conceptual scheme of the picker-combing machine is presented. The traditional technologies of harvesting flax fiber and technical means that ensure the implementation of technological operations related to the separate technology of harvesting are considered. Disadvantages of the technical means used in the separate harvesting technology of flax fiber are revealed. They consist in varying degrees of impact of threshing and separating combing bodies of harvesting machines of both rake and rotor type on the stems, which causes uneven curing along their length and leads to the deterioration of fiber quality, reduction of the number of extra valuable long fiber and losses of the seed part of the crop. A conceptual scheme of the basic threshing and separating device of a roll-fulling type for separate technology of flax fiber harvesting by improving the picker- combing machine is proposed. The proposed device variant provides simultaneous threshing of flax fiber strips and creates favorable conditions for quality curing of straw to the state of flax straw simultaneously along the entire stalk length by its uniform conditioning in the gaps between the rubberized rollers. The combing header equipped with a threshing and separating device of the roll-fulling type allows to separate the seeds from the uncombed flax strip regardless of the location of the seed part relative to the movement direction of the harvesting machine. Versatility, simplicity and wide range of application of the threshing and separating device of the roll-fulling type are reasonable to use when designing machines for harvesting flax fiber for direct, separate and factory harvesting technologies.

Published
2023

42. Educational Marine Robotics in SMTU

Author

Kozhemyakin, Igor, Rozhdestvensky, Kirill, Ryzhov, Vladimir, Semenov, Nikolay, Chemodanov, Mikhail, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Ronzhin, Andrey, editor, Rigoll, Gerhard, editor, and Meshcheryakov, Roman, editor

Published
2016
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47. Update of the technical equipment of the grain-harvesting complex

Author

S. I. Chemodanov and Yu. V. Burlakov

Subjects
Forestry, Plant Science
Abstract

Many options have been developed for the implementation of the algorithm for updating the fleet of grain harvesters to date. In accordance with the yield and other indicators, recommendations for the formation and renewal of the harvester fleet are proposed discretely in the form of tables or charts.This form of information does not always meet the requirements of operational correction and does not allow assessing the technological capabilities of the harvesting units, depending on the harvesting conditions.The method to improve the formation of the initial information for operational decision-making on the effective upgrading of technical means of grain harvesting complex taking into account the zonal features of a particular agricultural enterprise is proposed.A graph-analytical method for determining the main parameters of the basic harvesting tools depending on the predicted yield level is developed and the influence of the factors determining the composition of the grain harvesting fleet is assessed.This method makes it possible to identify the most rational basic parameters of alternative basic harvesting tools for a specific agricultural enterprise.The first step is to determine the basic parameters of the basic equipment, then select the appropriate size series of self-propelled threshers for combine harvesters and reapers.Further, alternative versions of various models of grain harvesting units and complexes are formed.For the subsequent selection of rational types of cleaning agents and their criterion assessment, technical and technological, environmental and other indicators are used.The expert-logical analysis of information resources makes it possible to identify and assess the factors that determine the quantitative composition of the technical means of the grain harvesting complex.The final stage in the formation of the initial information for making a decision on updating the technical means of the grain harvesting complex should be their economic assessment, which makes it possible to predict the competitiveness of the threshed grain.

Published
2022

50. Optimization of the control paper production system of using the extremum seeking control method

Author

Olga Ermilina and Vladimir Chemodanov

Subjects
General Chemical Engineering, General Engineering, General Earth and Planetary Sciences, General Physics and Astronomy, General Materials Science, General Environmental Science
Abstract

Currently the pulp and paper industry is one of the fastest growing sectors of the economy in Russia and other countries. An important aspect of the further development of this industry is associated with an increase in the efficiency of paper production and the quality of finished products with an economical and rational use of raw materials, fuel and energy and other material resources. This is facilitated by the use of modern means of automation and process control. It was experimentally established that there is an extreme dependence between the ratio of the speeds of the paper pulp and the paper machine and the standard deviation of the linear density of the paper web, which determines the degree of non-uniformity of the paper gap. The use of a noise-resistant algorithm for extreme control of an inertial object based on the combination of synchronous accumulation and synchronous detection methods with subsequent search for the maximum amplitude of the second harmonic of the filtered signal, aimed at reducing the root-mean-square deviation of the mass of a square meter of paper web, is considered. It is proposed to simultaneously stabilize the mass flow rate of paper pulp and the coordinate of the fall of the paper pulp jet onto the conveyor mesh, which made it possible to increase the efficiency of paper production.

Published
2023

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