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Technological monitoring of subgrade construction on high-temperature permafrost

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Research in Cold and Arid Regions 2015年第4期7卷 316-322页

作者： svyatoslav ya.lutskiy Taisia V.Shepitko Alexander M.Cherkasov Federal State-Funded Educational Institution of Higher Vocational Education Moscow State University of Railway Engineering MGUPS (MIIT)

Three stages of complex technological monitoring for the increase of high-temperature-permafrost soil bearing capacity are described. The feasibility of process monitoring to improve the targeted strength properties of subgrade bases on frozen soils is demonstrated. The rationale for the necessity of predictive modeling of freeze-thaw actions during the subgrade construction period is provided.

关键词： permafrost soils subgrade monitoring bearing capacity complex technology

Composite technology of earthwork construction on taliks in cryolithic zones

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Research in Cold and Arid Regions 2013年第5期5卷 577-581页

作者： svyatoslav ya.lutskiy Taisiya V.Shepitko Alexander M.Cherkasov Federal State-Funded Educational Institution of Higher Vocational Education Moscow State University of Railway Engineering (MGUPS (MIIT)) Institute of Rail Track Construction and Structures Permafrost Research Laboratory Federal State-Funded Educational Institution of Higher Vocational EducationMoscow State University of Railway Engineering (MGUPS (MIIT))

This paper reviews construction and technological solutions for roadbeds in talik areas of permafrost soil, and proposes an integrated technology for prevention and elimination of taliks during construction periods. It also summarizes the expe- rience of process regulation scheduling and soil conditions monitoring during construction.

关键词： integrated technology permafrost soil taliks technological adjustment

Changes in filtration and capacitance properties of highly porous reservoir in underground gas storage:CT-based and geomechanical modeling

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 2982-2995页

作者： Valerii Khimulia Vladimir Karev Yury Kovalenko svyatoslav Barkov Ishlinsky Institute for Problems in Mechanics RAS Moscow119526Russia

The paper presents the results of comprehensive studies of filtration and capacitance properties of highly porous reservoir rocks of the aquifer of an underground gas storage *** geomechanical part of the research included studying the dependence of rock permeability on the stress-strain state in the vicinity of the wells,and physical modeling of the implementation of the method of increasing the permeability of the wellbore zone-the method of directional unloading of the *** digital part of the research included computed tomography(CT)-based computer analysis of the internal structure,pore space characteristics,and filtration properties before and after the *** to the results of physical modeling of deformation and filtration processes,it is found that the permeability of rocks before fracture depends on the stress-strain state insignificantly,and this influence is ***,when downhole pressure reaches 7-8 MPa,macrocracks in the rock begin to grow,accompanied by irreversible permeability ***,geodesic tortuosity and permeability values were obtained based on digital studies and numerical modeling.A weak degree of transversal anisotropy of the filtration properties of rocks was *** on the analysis of pore size distribution,pressure field and flow velocities,high homogeneity and connectivity of the rock pore space is *** absence of pronounced changes in pore space characteristics and pore permeability after non-uniform triaxial loading rocks was *** the basis of geometrical analysis of pore space,the reasons for weak permeability anisotropy were *** filtration-capacitance properties obtained from the digital analysis showed very good agreement with the results of field and laboratory *** physical modeling has confirmed the efficiency of application of the directional unloading method for the reservoir under *** necessary parameters of its application were calcu

关键词： Permeability anisotropy Reservoir porosity Rocks computed tomography(CT) Digital core analysis Filtration flow numerical modeling

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单原子活化过硫酸盐降解有机污染物研究进展

工业水处理 2024年第7期44卷 38-46页

作者：赵杰吴俊峰窦艳艳 Fedorov svyatoslav VIKTOROVICH 王现丽刘彪朱新锋毛艳丽高宏斌中原工学院能源与环境学院河南郑州450007 河南城建学院河南省水体污染防治与修复重点实验室河南平顶山467036 圣彼得堡国立建筑工程大学环境与市政工程学院俄罗斯圣彼得堡190005

随着工业的迅速发展,含有大量难降解有机污染物的生活生产废水被排入水体,对人体健康与环境产生严重威胁。基于过硫酸盐的高级氧化技术在处理难降解有机废水上有着突出表现,而采用单原子催化剂能最大限度地利用金属原子,减少金属离子溶... 详细信息

随着工业的迅速发展,含有大量难降解有机污染物的生活生产废水被排入水体,对人体健康与环境产生严重威胁。基于过硫酸盐的高级氧化技术在处理难降解有机废水上有着突出表现,而采用单原子催化剂能最大限度地利用金属原子,减少金属离子溶出,在活化过硫酸盐降解有机污染物中有很好的应用前景。综述了单原子催化剂的制备方法,并阐述了各种方法的优缺点。分别论述了Fe、Co、Mn和Cu等金属单原子催化剂活化过硫酸盐降解有机污染物的应用,并总结了单原子催化剂活化过硫酸盐的机理以及单原子催化剂活化过硫酸盐体系对有机污染物的降解机理。最后对单原子催化剂活化过硫酸盐降解有机污染物未来的发展做出了讨论及展望。

关键词：单原子催化剂过硫酸盐有机污染物金属基催化剂

Thermodynamic and rate variational formulation of models for inhomogeneous gradient materials with microstructure and application to phase field modeling

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Acta Mechanica Sinica 2015年第2期31卷 162-172页

作者： svyatoslav Gladkov Bob Svendsen Material Mechanics RWTH Aachen Aachen Germany Microstructure Physics and Alloy Design Max-Planck-Institut fur Eisenforschung DusseldorfGermany

In this work,thermodynamic models for the energetics and kinetics of inhomogeneous gradient materials with microstructure are formulated in the context of continuum thermodynamics and material *** simplicity,attention is restricted to isothermal *** materials of interest here are characterized by（1） first- and secondorder gradients of the deformation field and（2） a kinematic microstructure field and its gradient（e.g.,in the sense of director,micromorphic or Cosserat microstructure）.Material inhomogeneity takes the form of multiple phases and chemical constituents,modeled here with the help of corresponding phase *** requirements together with the dissipation principle result in the reduced model field and constitutive *** cases of these include the wellknown Cahn-Hilliard and Ginzburg-Landau *** the last part of the work,initial boundary value problems for this class of materials are formulated with the help of rate variational methods.

关键词： Continuum thermodynamics Material inhomogeneity Conservative Non-conservative phase fields

生物炭/光催化复合材料去除水环境有机污染物研究进展

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化学试剂 2024年第5期46卷 53-62页

作者：周通任旭阳王晨阳李发站郭翔吴俊峰 Fedorov svyatoslav V 华北水利水电大学环境与市政工程学院河南郑州450040 河南城建学院河南省水体污染防治与修复重点实验室河南平顶山467036 圣彼得堡国立建筑工程大学环境与市政工程学院俄罗斯圣彼得堡190005

以光催化材料为基础的高级氧化处理技术被公认为是处理水环境中有机污染物最具潜力的绿色方法之一。同时,“以废治废”逐渐成为“碳中和”背景下对污染治理的新要求,为提高环境治理水平和社会可持续发展能力,利用生物废弃物等转化为生... 详细信息

以光催化材料为基础的高级氧化处理技术被公认为是处理水环境中有机污染物最具潜力的绿色方法之一。同时,“以废治废”逐渐成为“碳中和”背景下对污染治理的新要求,为提高环境治理水平和社会可持续发展能力,利用生物废弃物等转化为生物炭已成为当前研究热点。利用生物炭具有比表面积易调控、导电性能好以及表面官能团丰富等优势,将光催化氧化与生物炭吸附进行功能协同是一种极具发展前景的有机污染物去除研究体系。概括了生物炭/光催化复合材料的制备方法与工艺,分析了复合材料中生物炭和光催化材料二者功能间的相互影响。此外,通过阐述生物炭/光催化复合材料对污染物的去除过程,深入探讨了吸附-光降解的整体作用机制,并梳理了国内外针对最新重点管控新污染物清单的相关研究进展。最后针对复合材料界面关系、电子迁移性质、综合水体应用等方面,对生物炭/光催化复合材料提出了相关讨论和未来建议。

关键词：生物炭光催化吸附-降解机制新污染物碳中和

Grazing rate and feeding selectivity of small and large bodied cladocerans in waters from lakes with different salinity and phytoplankton structure

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Journal of Oceanology and Limnology 2023年第4期41卷 1341-1351页

作者： Egor ZADEREEV Tatiana LOPATINA svyatoslav OVCHINNIKOV Alexander TOLOMEEV Institute of Biophysics Krasnoyarsk Research CenterSiberian Branch of Russian Academy of SciencesAkademgorodokKrasnoyarsk 660036Russia Siberian Federal University Krasnoyarsk 660041Russia

Cladocera are filter feeders abundant in freshwaters,which consume phytoplankton particles in wide size and taxonomic *** ability of cladocerans to control phytoplankton abundance by grazing is determined by various factors including the characteristics of *** salinization may reduce the strength of top-down grazing control of phytoplankton because of the detrimental effects of salinity on the grazing intensity of *** performed grazing experiments with two species of Cladocera of different body lengths to test their ability to graze on phytoplankton in natural waters differing in salinity and size and taxonomic composition of food *** experiments demonstrated that the grazing rate was mostly controlled by the abundance of phytoplankton in the *** grazing rate was reduced at salinity *** 3 g/L of NaCl in the *** lower grazing rate was observed in the medium with larger phytoplankton *** species predominantly consumed phytoplankton particles with a diameter of 6-12μm,which may shift the size distribution of phytoplankton towards a larger average diameter of *** taxon-specific feeding was also observed,as both species predominantly consumed diatom ***,we found that because of grazing,the size and taxonomic characteristics of phytoplankton are shifted towards a less edible *** detrimental effect of elevated salinity on grazing rate supports growing concern about freshwater salinization negatively affecting water quality,particularly reducing top-down grazing control of phytoplankton.

关键词： selective feeding Daphnia Moina top-down control phytoplankton salinity

Symmetrizing cathode-anode response to speed up charging of nanoporous supercapacitors

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Green Energy & Environment 2022年第1期7卷 95-104页

作者： Tangming Mo Liang Zeng Zhenxiang Wang svyatoslav Kondrat Guang Feng State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and Technology(HUST)Wuhan430074China Nano Interface Centre for Energy School of Energy and Power EngineeringHuazhong University of Science and Technology430074China Institute of Physical Chemistry Polish Academy of SciencesKasprzaka 44/52Warsaw01-224Poland Max-Planck-Institut FuÈr Intelligente Systeme StuttgartD-70569Germany IV.Institut FuÈr Theoretische Physik Universit

Asymmetric behaviors of capacitance and charging dynamics in the cathode and anode are general for nanoporous *** this behavior is essential for the optimal design of ***,we perform constant-potential molecular dynamics simulations to reveal asymmetric features of porous supercapacitors and their effects on capacitance and charging *** simulations show that,counterintuitively,charging dynamics can be fast in pores providing slow ion diffusion and vice *** electrodes with singlesize pores,multi-pore electrodes show overcharging and accelerated co-ion desorption,which can be attributed to the subtle interplay between the dynamics and charging *** find that capacitance and charging dynamics correlate with how the ions respond to an applied cell voltage in the cathode and *** demonstrate that symmetrizing this response can help boost power density,which may find practical applications in supercapacitor optimization.

关键词： Nanoporous carbon Charging dynamics Charge storage mechanism Overfilling Overcharging

Use of nanoscale metals in poultry diet as a mineral feed additive

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Animal Nutrition 2020年第2期6卷 185-191页

作者： Еlena Sizova Sergey Miroshnikov svyatoslav Lebedev Boris Usha Sergey Shabunin Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences Orenburg460000Russia Orenburg State University Orenburg460018Russia Moscow State University of Food Production Moscow125080Russia Federal State Budget Scientific Institute(All-Russian Veterinary Research Institute of Pathology Pharmacology and Therapy)Voronezh394087Russia

The research was aimed at studying the efficiency of a nanoscale alloy of copper(Cu) and zinc(Zn) to be used as a mineral additive for feeding broiler chickens,compared to inorganic and organic forms of these *** studies of the blood serum were performed using an automated *** mineral composition was determined by atomic emission and mass spectrometry(MS-ISP),The study was performed on broiler chickens of cross Smena 7(n=72) in the conditions of a *** were3 treatment groups with 24 chickens in *** the inorganic form of mineral supplements with the nanosized alloy resulted in a positive productive effect,with a tendency to increasing the content of serum *** nano scale form of metals improved(P <0.05) the activity of *** the same time,the liver micro structure of experimental groups is similar to that of the *** was a moderate plethora and poor polymorphoncellular infiltration around the interlobular triads with a clear morphological orga nization of the stromal and parenchymal co mponents of the ***,the lack of oxidative stress was confirmed by the dynamics of catalase(CT),total superoxide dismutase(TSOD) and malondialdehyde(MDA) levels,and the concentrations of which did not exceed the reference level Replacing Cu and Zn sulfates with the nanoscale alloy(group 1) and organic form(group 2) of these elements in the diet of broiler chickens was accompanied by the increasing pool of these elements in the organisms at the end of the *** was accumulated throughout the experiment in experimental group 1,compared to the reference,with the maximum difference in the liver of 36.5%(P ≤ 0.05),in the feathers 2.5 times(P ≤ 0.01).Assessment of the Zn level dynamics in the feathers revealed a well noticeable tendency to reducing its concentrations during the experiment in all *** the background of feeding a nanoscale alloy,Zn concentration in the liver exceeded th

关键词： Broiler chicken Feeding Mineral supplement Nanoscale metal