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Найдено документов в текущей БД: 8

    Challenges and opportunities for integrating lake ecosystem modelling approaches
[Text] / W.M. Mooij [et al.] // Aquat. Ecol. - 2010. - Vol. 44, Is. 3. - pp. 633-667, DOI 10.1007/s10452-010-9339-3. - Cited References: 260. - WM, RG, IP, SG, PV and AD were supported by grant 047.017.012 of the Netherlands Organization for Scientific Research (NWO) and the Russian Foundation for Basic Research (RFBR). LDSD was supported by NWO grant 817.01.007. DT and EJ were supported by EU-REFRESH, EU-WISER, CLEAR (a Villum Kann Rasmussen Centre of Excellence Project on lake restoration) and CRES. We thank Prof. Andre De Roos for his insightful comments and Dr. Tom Andersen for his contribution to the text. JJ wishes to thank Drs. T. Aldenberg, Dr. L. Van Liere, Mr. M.J. 't Hart, Ir. M.H.J.L Jeuken, Ing. S. van Tol, Ir. J.S. Sloot and many others including the many people who provided lake data, for their contributions to PCLake. This is publication 4838 of the Netherlands Institute of Ecology (NIOO-KNAW). . - ISSN 1386-2588
РУБ Ecology + Limnology + Marine & Freshwater Biology

Аннотация: A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others ('reinventing the wheel'). The other challenge is to avoid focusing on only one type of model, while ignoring new and diverse approaches that have become available ('having tunnel vision'). In this paper, we aim at improving the awareness of existing models and knowledge of concurrent approaches in lake ecosystem modelling, without covering all possible model tools and avenues. First, we present a broad variety of modelling approaches. To illustrate these approaches, we give brief descriptions of rather arbitrarily selected sets of specific models. We deal with static models (steady state and regression models), complex dynamic models (CAEDYM, CE-QUAL-W2, Delft 3D-ECO, LakeMab, LakeWeb, MyLake, PCLake, PROTECH, SALMO), structurally dynamic models and minimal dynamic models. We also discuss a group of approaches that could all be classified as individual based: super-individual models (Piscator, Charisma), physiologically structured models, stage-structured models and traitbased models. We briefly mention genetic algorithms, neural networks, Kalman filters and fuzzy logic. Thereafter, we zoom in, as an in-depth example, on the multi-decadal development and application of the lake ecosystem model PCLake and related models (PCLake Metamodel, Lake Shira Model, IPH-TRIM3D-PCLake). In the discussion, we argue that while the historical development of each approach and model is understandable given its 'leading principle', there are many opportunities for combining approaches. We take the point of view that a single 'right' approach does not exist and should not be strived for. Instead, multiple modelling approaches, applied concurrently to a given problem, can help develop an integrative view on the functioning of lake ecosystems. We end with a set of specific recommendations that may be of help in the further development of lake ecosystem models.


Доп.точки доступа:
Mooij, W.M.; Trolle, D.; Jeppesen, E.; Arhonditsis, G.; Belolipetsky, P.V.; Белолипецкий, Павел Викторович; Chitamwebwa, D.B.R.; Degermendzhy, A.G.; DeAngelis, D.L.; Domis, L.N.D.; Downing, A.S.; Elliott, J.A.; Fragoso, C.R.; Gaedke, U.; Genova, S.N.; Генова, Светлана Николаевна; Gulati, R.D.; Hakanson, L.; Hamilton, D.P.; Hipsey, M.R.; 't Hoen, J.; Hulsmann, S.; Los, F.H.; Makler-Pick, V.; Petzoldt, T.; Prokopkin, I.G.; Rinke, K.; Schep, S.A.; Tominaga, K.; Van Dam, A.A.; Van Nes, E.H.; Wells, S.A.; Janse, J.H.

    How much non-coding DNA do eukaryotes require?
[Текст] : статья / S. Ahnert, T. Fink, A. Zinovyev // Journal of Theoretical Biology. - 2008. - Vol. 252, Iss. 4. - p. 587–592DOI 10.1016/j.jtbi.2008.02.005 . -

Кл.слова (ненормированные):
Genetic networks -- Accelerated networks -- Prokaryotes -- Minimum

Аннотация: Despite tremendous advances in the field of genomics, the amount and function of the large non-coding part of the genome in higher organisms remains poorly understood. Here we report an observation, made for 37 fully sequenced eukaryotic genomes, which indicates that eukaryotes require a certain minimum amount of non-coding DNA (ncDNA). This minimum increases quadratically with the amount of DNA located in exons. Based on a simple model of the growth of regulatory networks, we derive a theoretical prediction of the required quantity of ncDNA and find it to be in excellent agreement with the data. The amount of additional ncDNA (in basepairs) which eukaryotes require obeys Ndef=1/2 (Nc/Np) (Nc−Np), where Nc is the amount of exonic DNA, and Np is a constant of about 10 Mb. This value Ndef corresponds to a few percent of the genome in Homo sapiens and other mammals, and up to half the genome in simpler eukaryotes. Thus, our findings confirm that eukaryotic life depends on a substantial fraction of ncDNA and also make a prediction of the size of this fraction, which matches the data closely.

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Доп.точки доступа:
Fink, Thomas M.A.; Zinovyev, Andrei; Зиновьев, Андрей Юрьевич
004.94
И117

    Информационное обеспечение управленияприродно-техногенной безопасностью
[Текст] : статья / В. В. Ничепорчук // Сибирский пожарно-спасательный вестник. - 2016. - № 1. - С. 49-54 . - ISSN 2500-4026
   Перевод заглавия: Information Management Softwarenatural and technogenic safety
УДК

Аннотация: Рассмотрены прикладные аспекты оценивания и управления рисками чрезвычайных и кризисных ситуаций на основе данных комплексного мониторинга. Представлены результаты анализа процессов формирования и использования информационных ресурсов. Описаны результаты работы интегрированного программно-аппаратного комплекса мониторинга в Территориальном центре мониторинга и прогнозирования ЧС Краснояр-ского края.
This paper presents the applied aspects of risk assessment and control of the emergencies and crisis situations based on the comprehensive data monitoring. The processes of consolidation and application of information resources for risk management are considered. The results of implementation of automated system in the Center of Emergency Monitoring and Prediction of Krasnoyarsk Region are described in the paper

РИНЦ

Держатели документа:
ФГБУН Институт вычислительного моделирования СО РАН

Доп.точки доступа:
Nicheporchuk V.V.

    On the influence of the local maxima of total pressure on the current sheet stability to the kink-like (flapping) mode
/ D. B. Korovinskiy [et al.] // Phys. Plasmas. - 2018. - Vol. 25, Is. 2, DOI 10.1063/1.5016934 . - ISSN 1070-664X
Аннотация: The stability of the Fadeev-like current sheet with respect to transversally propagating kink-like perturbations (flapping mode) is considered in terms of two-dimensional linear magnetohydrodynamic numerical simulations. It is found that the current sheet is stable when the total pressure minimum is located in the sheet center and unstable when the maximum value is reached there. It is shown that an unstable spot of any size enforces the whole sheet to be unstable, though the increment of instability decreases with the reduction of the unstable domain. In unstable sheets, the dispersion curve of instability shows a good match with the double-gradient (DG) model prediction. Here, the typical growth rate (short-wavelength limit) is close to the DG estimate averaged over the unstable region. In stable configurations, the typical frequency matches the maximum DG estimate. The dispersion curve of oscillations demonstrates a local maximum at wavelength ~0.7 sheet half-width, which is a new feature that is absent in simplified analytical solutions. © 2018 Author(s).

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Держатели документа:
Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, Austria
Institute of Computational Modelling, FRC krasnoyarsk Science CenterSBRAS, Krasnoyarsk, Russian Federation
Applied Mechanics Department, Siberian Federal University, Krasnoyarsk, Russian Federation
Earth Physics Department, Saint Petersburg State University, Ulyanovskaya 1, Petrodvoretz, Russian Federation
Theoretical Physics Division, Petersburg Nuclear Physics Institute, Gatchina, Russian Federation
Department of Applied Mathematics and Computer Security, Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Korovinskiy, D. B.; Erkaev, N. V.; Semenov, V. S.; Ivanov, I. B.; Kiehas, S. A.; Ryzhkov, I. I.
004
С 56

    Современные подходы к прогнозированию чрезвычайных ситуаций
: статья / В.В Ничепорчук // Сибирский пожарно-спасательный вестник. - 2018. - № 1. - С. 89-95 . - ISSN 2500-4026
   Перевод заглавия: Modern approaches to forecasting of emergencies
УДК

Аннотация: Приведён анализ методов прогнозирования, используемых в органах управления МЧС России и взаимодействующих ведомств. Предложена методика краткосрочного прогнозирования, интегрирующая прогнозы погоды, средства статистического анализа архивов событий, формализованные характеристики территорий и методы картографической визуализации результатов предиктивного анализа.
This paper presents an analysis of prediction methods of emergency. These methods used now in the management bodies of EMERCOM of Russia. The method of prediction that integrates weather forecasts, statistical analysis, archives of events, formal characteristics of the territories is proposed. The methods of cartographic visualization of analytical results are described.

РИНЦ

Держатели документа:
Институт вычислительного моделирования Сибирского отделения РАН

Доп.точки доступа:
Ничепорчук, В.В; Nichiporchuk V.V.

    Investigation of the influence of wind stress in autumn leading to unstable stratification in a meromictic lake using three-dimensional numerical modeling
/ T. V. Iakubaylik // IOP Conference Series: Materials Science and Engineering : Institute of Physics Publishing, 2019. - Vol. 537: International Workshop on Advanced Technologies in Material Science, Mechanical and Automation Engineering - MIP: Engineering-2019 (4 April 2019 through 6 April 2019, ) Conference code: 149243, Is. 6, DOI 10.1088/1757-899X/537/6/062072 . -
Аннотация: Currents in lakes affect the distribution of hydrophysical and hydrobiological characteristics. Three-dimensional model study is an important step toward an improved understanding and reliable prediction of the distribution of hydrophysical fields. Salt stratified lake Shira refers to meromictic reservoirs. The depth of the upper mixed layer depends on many factors (even a few isolated, fairly rare facts of its complete mixing are known). The study of the influence of each of them separately is the task of mathematical modeling. The model results indicate that strong wind stress in the autumn can result in unstable density stratification, leading to intense vertical circulation. © 2019 IOP Publishing Ltd. All rights reserved.

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Держатели документа:
Institute of Computational Modeling, SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Iakubaylik, T. V.

    Analysis of the influence of abiotic factors on the functional activity of plankton communities of the Krasnoyarsk reservoir
[Text] : доклад, тезисы доклада / P. Postnikova, A. Korobko, G. Makarskaya // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM : 18 / 18th International Multidisciplinary Scientific Geoconference, SGEM 2018 (2018 ; 02.07 - 08.07 ; Albena). - 2018. - 18DOI 10.5593/sgem2018/3.1/S12.007 . -
Аннотация: The main task of complex environmental monitoring is evaluating the state of an aquatic system and state prediction of ecosystem links under different levels of water supply, anthropogenic influence and climatic fluctuations. The paper analyzes the inter-annual dynamics of functional activity of bacterio – and phytoplankton of the Krasnoyarsk reservoir depending on abiotic factors (reservoir filling level and temperature conditions). The data have been obtained from series of regular observations during the growing season in the 2000 – 2017. In the work, distribution of concentration of chlorophyll "a" and photosynthetic activity of the phytoplankton, production characteristics of bacterioplankton and biochemical oxygen demand (BOD5) are presented. The analysis is carried out in the model-driven system of support of hydrobiological studies of the Krasnoyarsk reservoir by the method of k-means. Systematization of accumulated data of scientific research has become a basis for a sequence of long-term investigations, a comparative analysis of data from related studies and data analysis.

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Источник статьи

Держатели документа:
Institute of Computational Modeling SB RAS

Доп.точки доступа:
Postnikova, P.; Korobko, A.; Makarskaya, G.; 18th International Multidisciplinary Scientific Geoconference, SGEM 2018(2018 ; 02.07 - 08.07 ; Albena)
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    Modelling of ethanol pyrolysis in a commercial CVD reactor for growing carbon layers on alumina substrates
/ A. V. Minakov, M. M. Simunin, I. I. Ryzhkov // Int. J. Heat Mass Transf. - 2019. - Vol. 145. - Ст. 118764, DOI 10.1016/j.ijheatmasstransfer.2019.118764 . - ISSN 0017-9310

Кл.слова (ненормированные):
Chemical kinetics -- Chemical vapour deposition -- Computational modelling -- Ethanol pyrolysis

Аннотация: Chemical vapour deposition (CVD) is widely used for preparation of pyrolytic carbons from various precursors. The prediction of deposition kinetics requires deep understanding of all transport phenomena involved. In this work, we perform the computational modelling of ethanol pyrolysis in a commercial CVD reactor (a tube furnace). The reactor is employed for growing carbon layers on alumina substrates. The inlet gas flow is produced by evaporating azeotrope ethanol/water mixture and mixing it with inert gas (argon). The modelling is performed in 3D and 2D statements using Marinov mechanism with 57 species participating in 383 reactions. The heat and species transport is taken into account with temperature dependent physical properties. It is shown that the inlet gas velocity in the 2D statement should be corrected for a meaningful comparison with the 3D case. A good agreement is found between species mole fractions at the substrate position for 3D and 2D statements at low volume flow rates, while at high flow rates some deviations are observed. The temperature at the substrate position is found to be lower than at the reactor wall due to inflow of a colder gas. The main pyrolysis products at moderate temperatures (around 900 °C) are water, ethylene, hydrogen, carbon monoxide, and methane. With increasing temperature, the mole fractions of hydrogen, acetylene, and carbon monoxide increase, while those of water and methane become smaller. With increasing ethanol/water volume flow rate, the mole fractions of ethanol and pyrolysis products saturate at some constant values due to incomplete thermal decomposition of ethanol in the reactor volume. The rise of argon flow rate leads to the decrease of pyrolysis products mole fractions due to decrease of residence time. The obtained results can be employed for simulating and analyzing pyrolysis processes in realistic CVD reactors with complex geometry as well as for the development of coupled gas phase and surface reaction model of carbon layer deposition on nanoporous substrates. © 2019 Elsevier Ltd

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Держатели документа:
Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation
Institute of Computational Modelling SB RAS, Akademgorodok 50–44, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Minakov, A. V.; Simunin, M. M.; Ryzhkov, I. I.