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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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Targeting neutrophil subsets is a novel approach for myocardial ischemia-reperfusion injury

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Science Bulletin 2024年第18期69卷 2814-2815页

作者： valerii Chereshnev Institute of Immunology and Physiology Ural Branch of the Russian Academy of ScienceEkaterinburg 620049Russia

Recently,in their 2024 study,Dong et al.[1]revealed the pivotal role of neutrophils in the immune response of myocardial ischemia-reperfusion injury(MIRI)via single-cell RNA sequencing(sc RNA-seq),and identified the existence and function of a novel neutrophil subset with repair phenotype,which participates in the cardio-protection of MIRI by regulating the polarization of macrophages via *** finding not only deepens our understanding of cellular interactions within MIRI but also opens new therapeutic avenues.

关键词： neutrophil ischemia al.

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Spark Plasma Sintering of Boron Carbide Using Ti_(3)SiC_(2) as a Sintering Additive

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 645-650页

作者： Hülya Biçer Mustafa Tuncer Hasan Göçmez Iurii Bogomol valerii kolesnich.nko Andrey Ragulya Kutahya Dumlupinar University School of EngineeringDepartment of Metallurgical and Materials EngineeringKütahya 43100Tur-key Boron Based Advanced Ceramics Application and Research Center Kütahya Dumlupınar UniversityKütahya 43100Turkey Advanced Technologies Center(İLTEM) Kütahya Dumlupınar UniversityKütahya 43000Turkey Department of High-Temperature Ma-terials and Powder Metallurgy National Technical University of Ukraine“Igor Sikorsky Kyiv Polytechnic Institute”Kyiv 03056Ukraine Frantsevich Institute for Problems of Materials Science National Academy of Sciences of UkraineKyiv 03056Ukraine

Boron carbide has unique properties for wide application possibilities;however,poor sinterability limits its *** approach to overcome this limitation is the addition of secondary phases into boron *** carbide based composite ceramics are produced by the direct addition of secondary phases into the structure or via reactive sintering using a sintering *** present study investigated the effect of Ti_(3)SiC_(2) addition to boron carbide by reactive spark plasma sintering in the range of 1700-1900℃.Ti_(3)SiC_(2) phase decomposed at high temperatures and reacted with B4C to form secondary phases of TiB2 and *** results demonstrated that the increase of Ti_(3)SiC_(2) addition(up to 15 vol%)effectively promoted the densification of B4C and yielded higher ***,as the amount of Ti_(3)SiC_(2) increased further,the formation of microstructural inhomogeneity and agglomeration of secondary phases caused a decrease in hardness.

关键词： reactive sintering SPS boron carbide MAX phase

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Pareto Optimization as the Basic for Selecting Robotic Mechanic Assembly Technologies

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Applied Mathematics 2024年第6期15卷 421-439页

作者： valerii Kyrylovych Dragoljub Tanovic Dmytro Melnychuk Liudmyla Mohelnytska Petro Melnychuk Valery Yanovsky Faculty of Computer-Integrated Technologies Mechatronics and Robotics Zhytomyr Polytechnic State University Zhytomyr Ukraine Faculty of Mechanical Engineering University of Belgrade Belgrade Serbia

The task of selecting robotic mechanic assembly technologies (RMAT) is considered as a multi-criteria optimization task, which in this formulation is solved on the set of previously obtained solutions regarding the selection of RMAT. The purpose of the paper is to increase the efficiency of technological preparation of robotic mechanical assembly production of machine and instrument engineering due to a new approach to the selection of RMAT using Pareto optimization and the peculiarities of the selection task formulation. The novelty consists in the further development of a science-based approach to solving multi-criteria selection task, based on the first proposed formalisms of the specified process, which reflect the peculiarities of the selection task formulation, its meaningful essence and the content of the Pareto optimization method. The practical value of the research lies in the proposed engineering-acceptable approach to solving applied multi-criteria selection tasks on the example of RMAT selection, which is invariant to the statement of the selection task, the dimension of the task, and its meaningful essence. The methods of discrete optimization, fuzzy multi-criteria selection of alternatives, and the Pareto optimization method were used for the research. The main results of this work consist of the development of formalisms and the demonstration of the efficiency of the proposed approach for the applied task of RMAT selection. The peculiarity of the developed approach is the combination of Pareto optimization, performed on a discrete set of local criteria. Directions for further research are presented.

关键词： Multicriteria Optimization Efficiency Fuzzy Multicriteria Selection of Alternatives

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Publisher Correction to:Strongly Coupled 2D Transition Metal Chalcogenide‑MXene‑Carbonaceous Nanoribbon Heterostructures with Ultrafast Ion Transport for Boosting Sodium/Potassium Ions Storage

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Nano-Micro Letters 2024年第6期16卷 458-458页

作者： Junming Cao Junzhi Li Dongdong Li Zeyu Yuan Yuming Zhang valerii Shulga Ziqi Sun Wei Han Sino‑Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology International Center of Future ScienceCollege of PhysicsJilin UniversityChangchun 130012People’s Republic of China Centre for Materials Science School of Chemistry and PhysicsQueensland University of Technology(QUT)2 George StreetBrisbaneQLD 4001Australia Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071People’s Republic of China

Due to the technical fault,a wrong version of the paper was *** content of the article was not affected,but the layout of the article was *** original article has been corrected.

关键词： Transition Strongly Storage

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Generalized Logan’s Problem for Entire Functions of Exponential Type and Optimal Argument in Jackson’s Inequality in L2（R3）

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Acta Mathematica Sinica,English Series 2018年第10期34卷 1563-1577页

作者： valerii IVANOV Alexey IVANOV Department of Applied Mathematics and Computer Science Tula State University

We study Jackson＇s inequality between the best approximation of a function f∈ L2（R^3） by entire functions of exponential spherical type and its generalized modulus of continuity. We prove Jackson＇s inequality with the exact constant and the optimal argument in the modulus of continuity. In particular, Jackson＇s inequality with the optimal parameters is obtained for classical modulus of continuity of order r and Thue-Morse modulus of continuity of order r∈ N. These results are based on the solution of the generalized Logan problem for entire functions of exponential type. For it we construct a new quadrature formulas for entire functions of exponential type.

关键词： Best approximation generalized modulus of continuity Jackson's inequality optimal argument Logan's problem quadrature formula

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Nursing education, continuing education and in practice training, research and digital technology application

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International Journal of Nursing Sciences 2017年第4期4卷 343-344页

作者： valerii Samoilenko Russian Nurses Association Russia

***(2015)There are 370 Nursing schools/colleges(+57 Medical Univer-sities)in *** majority of students in Nursing schools/col-leges get education free of charge.

关键词： Nursing education Medical

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Reasons for breaking of chemical bonds of gas molecules during movement of explosion products in cracks formed in rock mass

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International Journal of Mining Science and Technology 2020年第2期30卷 265-269页

作者： valerii Sobolev Nataliia Bilan Roman Dychkovskyi Edgar Caseres Cabana Adam Smolinski Department of Constraction Geotechnics and GeomechanicsDnipro University of TechnologyDnipro 49005Ukraine Department of General and Structural Geology Dnipro University of TechnologyDnipro 49005Ukraine Department of Underground Mining Dnipro University of TechnologyDnipro 49005Ukraine Scientific Research Institute of the Center of Renewable Energy and Energy Efficiency San Agustin National University ArequipaArequipa PE-04000Peru Central Mining Institute Katowice 40-166Poland

The purpose of this study was to develop a physico-mathematical model and technique for estimation of chemical bond stability depending on electric field intensity of an external point charge.A hypothesis for a possible physico-chemical mechanism of the formation of additional harmful gases in the rock destruction by blasting was *** theoretical basis of the hypothesis is the method of theretical evaluation of bond energy depending on the distance to a point charge,the third Coulomb *** quantum-mechanical model for calculating the electronic terms of molecules makes it possible to solve problems associated with the determination of parameters of molecules under the action of various physical fields on the system under *** model was approved for some diatomic *** discrepancy between the experimental data and calculated data did not exceed 14%,which proves accuracy of the obtained *** model can be used in the field of research into the causes of gas-dynamic phenomena in underground coal mines,in studies of the degree of stability of nanostructured components of coal under physical influences,and in the theoretical design of new compounds and structures in the field of nanomaterial science and nanotechnology.

关键词： Underground coal mine Gas sorption Quantum-mechanical model Rock mass

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Strongly Coupled 2D Transition Metal Chalcogenide-MXene-Carbonaceous Nanoribbon Heterostructures with Ultrafast Ion Transport for Boosting Sodium/Potassium Ions Storage

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Nano-Micro Letters 2021年第7期13卷 153-172页

作者： Junming Cao Junzhi Li Dongdong Li Zeyu Yuan Yuming Zhang valerii Shulga Ziqi Sun Wei Han Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology International Center of Future ScienceCollege of PhysicsJilin UniversityChangchun 130012People’s Republic of China Centre for Materials Science School of Chemistry and PhysicsQueensland University of Technology(QUT)2 George StreetBrisbaneQLD 4001Australia Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071People’s Republic of China

Combining with the advantages of two-dimensional(2D)nanomaterials,MXenes have shown great potential in next generation rechargeable *** with other 2D materials,MXenes generally suffer severe self-agglomeration,low capacity,and unsatisfied durability,particularly for larger sodium/potassium ions,compromising their practical *** this work,a novel ternary heterostructure self-assembled from transition metal selenides(MSe,M=Cu,Ni,and Co),MXene nanosheets and N-rich carbonaceous nanoribbons(CNRibs)with ultrafast ion transport properties is designed for sluggish sodium-ion(SIB)and potassium-ion(PIB)*** from the diverse chemical characteristics,the positively charged MSe anchored onto the electronegative hydroxy(-OH)functionalized MXene surfaces through electrostatic adsorption,while the fungal-derived CNRibs bonded with the other side of MXene through amino bridging and hydrogen *** unique MXene-based heterostructure prevents the restacking of 2D materials,increases the intrinsic conductivity,and most importantly,provides ultrafast interfacial ion transport pathways and extra surficial and interfacial storage sites,and thus,boosts the high-rate storage performances in SIB and PIB *** the quantitatively kinetic analysis and the density functional theory(DFT)calculations revealed that the interfacial ion transport is several orders higher than that of the pristine MXenes,which delivered much enhanced Na+(536.3 mAh g^(−1)@0.1 A g^(−1))and K^(+)(305.6 mAh g^(−1)@1.0 A g^(−1))storage capabilities and excel-lent long-term cycling ***,this work provides new insights into 2D materials engineering and low-cost,but kinetically sluggish post-Li batteries.

关键词： Ti_(3)C_(2)T_(x)MXene Heterostructure Transition metal chalcogenide Sodium and potassium-ions batteries DFT calculation

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Endoscopic management of intramural spontaneous duodenal hematoma:A case report

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World Journal of Gastroenterology 2022年第20期28卷 2243-2247页

作者： Giorgio valerii Vittorio Maria Ormando Carlo Cellini Luca Sacco Carmelo Barbera Gastroenterology and Endoscopy Unit Ospedale G.MazziniTeramo 64100Italy Gastroenterology and Endoscopy Unit AORN San Giuseppe MoscatiAvellino 83100Ital Surgery Unit Ospedale G.MazziniTeramo 64100Italy

BACKGROUND Intramural duodenal hematoma is a rare condition described for the first time in *** condition is usually associated with blunt abdominal trauma in *** non-traumatic risk factors for spontaneous duodenal haematoma include several pancreatic diseases,coagulation disorders,malignancy,collagenosis,peptic ulcers,vasculitis and upper endoscopy *** adults the most common risk factor reported is anticoagulation *** clinical presentation may vary from mild abdominal pain to acute abdomen and intestinal obstruction or gastrointestinal *** SUMMARY The aim of this case summary is to show a case of intramural spontaneous hematoma with symptoms of intestinal obstruction that was properly drained endoscopically by an innovative system lumen-apposing metal stent Hot AXIOS™stent(Boston Scientific Corp.,Marlborough,MA,United States).CONCLUSION Endoscopic lumen-apposing metal stent Hot AXIOS™stent is a safe and feasible treatment of duodenal intramural hematoma in our case.

关键词： Duodenal hematoma Several pancreatic diseases Endoscopy complication AXIOS™stent Case report

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