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Chinese Journal of Aeronautics 2021年第7期34卷 1-12页

作者： Katerina BEKLEMYSHEVA Vasily GOLUBEV Igor PETROV alexey VASYUKOV Moscow Institute of Physics and Technology DolgoprudniyRussia

The Grid-Characteristic numerical Method(GCM)that is quite common in solving aero and hydrodynamic problems can also be applied for mechanics of *** allows to implement complex border and contact conditions,including the non-reflecting border and the destructible *** this conditions are very important for the precise and effective modeling of LowVelocity Impacts(LVI)on fiber and Fiber-Metal Laminates(FML)and the resulting Barely Visible Impact Damage(BVID)that influences the residual strength of a composite aircraft *** is the type of damage that is not visible by the naked eye and can be hardly detected by a standard ultrasound equipment that is used for regular *** can appear during any weak impacts like bird strike or *** its influence on the residual strength of the part is very important to define the priorities of development of ultrasound *** this paper,the GCM was applied for a full cycle of loading of an FML aircraft cover *** FML consisted of a Carbon Fiber Reinforced Polymer(CFRP)and a single titanium layer on the upper *** cycle of loading in a single calculation consisted of an LVI caused by a small striker and a comparatively slow compressive in-plane ***-dimensional patterns of velocity and stress distributions over the time of calculation are *** patterns,obtained via the Hashin failure criterion are given and analyzed.

关键词： Fiber-metal laminate Grid-characteristic method Low-velocity impact Numerical modeling Residual strength

Roof model recommendation for complex buildings based on combination rules and symmetry features in footprints

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International Journal of Digital Earth 2018年第10期11卷 1039-1063页

作者： Xuke Hu Hongchao Fan alexey Noskov GIScience Research Group Institute of GeographyHeidelberg UniversityHeidelbergGermany School of Remote Sensing and Information Engineering Wuhan UniversityWuhanPeople’s Republic of China

Currently,very few roof shape information for complex buildings is available on ***,additional data requirements(e.g.3D point clouds)limit the applicability of many roof reconstruction *** mitigate this issue,we propose an approach to roof shape recommendations for complex buildings by exploring the inherited characteristics of building footprints:the disclosure of rectangles combinations in a partition of footprints and the symmetrical features of ***,it decomposes a complex footprint into rectangles by using an advanced minimal non-overlapping cover ***,a graph-based symmetry detection algorithm is proposed to identify all the symmetrical sub-clusters in ***,a set of selection rules are defined to rank partitions,and the best ones are chosen for roof shape ***,a set of combination rules and a symmetry rule are *** enables to evaluate the probability of a footprint being a certain combination of roof *** results show the growth of the probability of correctly recommending roof shapes for single rectangles and buildings from a prior probability of 17–45%and from a prior probability of 0.29–14.3%,removing 60%and 93%of the incorrect roof shape options,respectively.

关键词： Roof recommendation footprint decomposition symmetry detection symmetry rule combination rules intrinsic roof reconstruction OpenStreetMap

心肌缺血再灌注损伤中心肌免疫细胞单细胞图谱绘制及具有心肌保护效应的Ym-1hi中性粒细胞的鉴定

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Science Bulletin 2024年第7期69卷 949-967页

作者：董亚兰康真玉张子力张永强周海锋刘艳飞帅欣欣李君仪殷梁青青王埙埙马彦范恒 Feng Jiang 林志豪丁从珠金渊真 alexey Sarapultsev 李芳菲张戈谢天尹长军程翔罗珊珊刘玥胡德胜 Department of Integrated Traditional Chinese and Western Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Hubei Key Laboratory of Biological Targeted Therapy Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western MedicineNanjing University of Chinese MedicineNanjing 210008China National Clinical Research Center for Chinese Medicine Cardiology Xiyuan HospitalChinese Academy of Chinese Medical SciencesBeijing 100091China Department of Cardiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of International Education Tianjin University of Traditional Chinese MedicineTianjin 300193China Institute of Neuroscience School of MedicineXiamen UniversityXiamen 361102China School of Traditional Chinese Medicine Xiamen University MalaysiaSepang 43900Malaysia School of Medical Biology South Ural State UniversityChelyabinsk 620049Russia Shum Yiu Foon Sum Bik Chuen Memorial Centre for Cancer and Inflammation Research(CCIR) School of Chinese MedicineHong Kong Baptist UniversityHong Kong 999077China Institute of Integrated Bioinfomedicine and Translational Science School of Chinese MedicineHong Kong Baptist UniversityHong Kong 999077China Division of Vascular Surgery The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510080China Institute of Precision Medicine The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510080China Institute for Cardiovascular Prevention(IPEK) Ludwig-Maximilians-UniversityMunich 80336Germany Institute of Hematology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China China-Russia Medical Research Center for Stress Immunology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Myocardial ischemia–reperfusion injury(MIRI)is a major hindrance to the success of cardiac reperfusion *** increased neutrophil infiltration is a hallmark of MIRI,the subtypes and alterations of neutrophils in this process remain ***,we performed single-cell sequencing of cardiac CD45^(+)cells isolated from the murine myocardium subjected to MIRI at six-time *** identified diverse types of infiltrating immune cells and their dynamic changes during *** neutrophils showed the most immediate response and largest changes and featured with functionally heterogeneous subpopulations,including Ccl3^(hi)Neu and Ym-1^(hi)Neu,which were increased at 6 h and 1 d after reperfusion,***-1^(hi)Neu selectively expressed genes with protective effects and was,therefore,identified as a novel specific type of cardiac cell in the injured *** analysis indicated that neutrophils and their subtypes orchestrated subsequent immune responses in the cardiac tissues,especially instructing the response of *** abundance of Ym-1^(hi)Neu was closely correlated with the therapeutic efficacy of MIRI when neutrophils were specifically targeted by anti-Lymphocyte antigen 6 complex locus G6D(Ly6G)or anti-Intercellular cell adhesion molecule-1(ICAM-1)neutralizing *** addition,a neutrophil subtype with the same phenotype as Ym-1^(hi)Neu was detected in clinical samples and correlated with ***-1 inhibition exacerbated myocardial injury,whereas Ym-1 supplementation significantly ameliorated injury in MIRI mice,which was attributed to the tilt of Ym-1 on the polarization of macrophages toward the repair phenotype in myocardial ***,our findings reveal the antiinflammatory phenotype of Ym-1^(hi)Neu and highlight its critical role in myocardial protection during the early stages of MIRI.

关键词： Myocardial ischemia-reperfusion injury Neutrophil Ym-1 Cardiac immune response Single-cell sequencing

Categories and Weak Equivalences of Graded Algebras

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Algebra Colloquium 2019年第4期26卷 643-664页

作者： alexey Gordienko Ofir Schnabel James Zhang Department of Higher Mathematics Moscow State Technical University of Civil Aviation Kronshtadtsky Boulevardd.20125993 MoscowRussia Department of Mathematics ORT Braude College2161002 KarmiclIsrael 不详

In the study of the structure of graded algebras(such as graded ideals,graded subspaces,and radicals)or graded polynomial identities,the grading group can be replaced by any other group that realizes the same *** we come to the notion of weak equivalence of gradings:two gradings are weakly equivalent if there exists an isomorphism between the graded algebras that maps each graded component onto a graded *** group grading on an algebra can be weakly equivalent to G-gradings for many different groups G;however,it turns out that there is one distinguished group among them,called the universal group of the *** this paper we study categories and functors related to the notion of weak equivalence of *** particular,we introduce an oplax 2-functor that assigns to each grading its support,and show that the universal grading group functor has neither left nor right adjoint.

关键词： algebra grading adjoint functor oplax 2-functor (co)limit

Influence of polyolefin fibers on the strength and deformability properties of road pavement concrete

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第4期6卷 407-417页

作者： Olga Smirnova alexey Kharitonov Yuriy Belentsov Department of Constructing Mining Enterprises and Underground Structures Saint-Petersburg Mining UniversitySaint Petersburg 199106Russia Department of Technology of Building Materials and Metrology Saint-Petersburg State University of Architecture and Civil EngineeringSaint Petersburg 190005Russia Department of Building Materials and Technologies Emperor Alexander I St.Petersburg State Transport UniversitySaint Petersburg 190031Russia

Influence of the type and quantity of polyolefin fibers on the strength properties(compression strength, tensile strength in bending, strength in uniaxial tension), the deformation properties(elastic modulus, Poisson’s coefficient) and the abrasion resistance of cement concrete with water-to-cement ratio within 0.31 e0.55 were stated in the *** ways of fibers introduction into fresh concrete were investigated. It was shown that the fibers introduction method and procedure of mixing are the ways to improve the fibers uniform distribution in fresh concrete. The increase of the bending tensile strength and the uniaxial tensile strength of concrete with fibers reinforcement in comparison with the reference concrete was observed with the water-to-cement ratio decrease. The increase of uniaxial tensile strength at age of 28 days for concrete with macrofibers in amount of4.5 kg/m^3 was 23% and 29%;for macrofibers in quantity of 3 kg/m^3 was 19% and 26% with water-cement ratio equal to 0.49 and 0.31, respectively. The maximum reduction of abrasion in the range of 7.5%e10% was observed in concrete with water-to-cement ratio within0.44 e0.55 for all investigated types of fibers. The influence of fibers on the concrete abrasion with lower W/C ratio was negligible. The results can contribute to the rational use of modified polyolefin fibers in road pavement concrete.

关键词： Road pavement concrete Polyolefin fibers Strength Elastic modulus Abrasion Water-to-cement ratio

Glial decline and loss of homeostatic support rather than inflammation defines cognitive aging

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Neural Regeneration Research 2022年第3期17卷 565-566页

作者： Alexei Verkhratsky Natalia Lazareva alexey Semyanov Faculty of Biology Medicine and HealthThe University of ManchesterManchesterUK Achucarro Center for Neuroscience IKERBASQUEBasque Foundation for ScienceBilbaoDepartment of NeurosciencesUniversity of the Basque Country UPV/EHU and CIBERNEDLeioaSpain Sechenov First Moscow State Medical University MoscowRussia Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of SciencesFaculty of BiologyMoscow State UniversityMoscowRussia

The preservation of cognitive longevity and arresting the pandemic of senile dementia engulfing the modern world is arguably the major challenge faced by biomedical research in the 21st *** is the leading risk factor for neurodegenerative diseases and vascular dementia,and yet there is a clear distinction between physiological and pathological brain aging.

关键词： inflammation senile aging

Assessment of the Design Displacement Values at Seismic Fault Crossings and of Their Excess Probability

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Journal of Mountain Science 2011年第2期8卷 228-233页

作者： STROM Alexander IVASCHENKO alexey KOZHURIN Andrey Institute of Geospheres Dynamics of Russian Academy of Sciences Institute of Oceanology of Russian Academy of Sciences Geological Institute of Russian Academy of Sciences

Line structures such as pipelines that cross active faults should be designed to retain leak-tightness if the design displacement (Ddesign) occurs. Principal approaches to the Ddesign and rupture kinematics assessment are described. They are based on relationships between earthquake magnitude, rupture length and displacement, and on the detailed field data on a specific fault that crosses the pipeline route. Since the future offset at the crossing may exceed the design value, the probability of a displacement occurrence where the safety of the structure can not be ensured should be estimated. Assessment method on such event probability is described and exemplified through active fault studies carried out at several pipeline projects in Russia.

关键词： Active Fault Surface Rupture Design Displacement Pipeline Sakhalin Island

Control of chaotic oscillations of a satellite

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Applied Mathematics and Mechanics(English Edition) 2007年第7期28卷 893-900页

作者： alexey Bobtsov Nikolay Nikolaev Olga Slita Department of Control Systems and Informatics Saint-Petersburg State University of Information Technologies Mechanics and OpticsKronverksky Ave.49Saint-Petersburg197101Russia

Analytical conditions and practical methods of their realization are proposed to solve a problem of a command signal tracking for a nonlinear disturbed system. Nonlinear disturbed plants consisting of linear dynamic block and nonlinear block in feedback are considered. Nonlinear part of the plant and disturbance are unknown and bounded. The paper illustrates a possibility of applications of proposed algorithms to control libration angle of satellite.

关键词： adaptive control chaotic behaviour satellite control nonlinear stabilization nonlinear control output control

Evaluation of opening of fractures in the Logovskoye carbonate reservoir, Perm Krai, Russia

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Petroleum Research 2021年第2期6卷 137-143页

作者： Dmitriy A.Martyushev alexey Yurikov Department of Oil and Gas Technologies Perm National Research Polytechnic UniversityPerm614990Russia WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth6151Australia

The development of naturally fractured carbonate reservoirs is extremely challenging. Such reservoirshave a dual pore structure consisting of low-permeable matrix with large pore volume and highpermeable fractures constituting main paths for fluid flow. Productivity of wells drilled in such formations tends to decrease rapidly due to the drop in the reservoir pressure and closure of ***, it is crucial to monitor opening of fractures for the effective development of carbonate reservoirs. Three methods for monitoring of opening of fractures including tracer indicators method,Warren and Root method and Victorin’s empirical relation, are applied in the Logovskoye oil reservoir, acarbonate Tournaisian-Famennian formation in Upper Kama Region, Perm Krai, Russia. The threemethods provide reliable estimation of the opening of fractures, which match the reported laboratorydata obtained on thin sections of core samples. The limitations of each method are also discussed. Thetracer indicator method is time-consuming, the Warren and Root method includes hydrodynamic studiesand requires shutdown of wells influencing the oil production, and the application of Victorin’s relationrequires estimation of initial opening and current compressibility of fractures, which can be done usinganalysis of cores or tracer indicators studies. The appropriate method for monitoring of opening offractures should be chosen according to available resources, time, and economic targets of the development project.

关键词： Carbonates Well tests Tracer indicators Warren and Root method Indicator injection

The evolution of eccentricity in the eclipsing binary system AS Camelopardalis

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Research in Astronomy and Astrophysics 2018年第1期18卷 113-118页

作者： Valentina Kozyreva Anatoly Kusakin alexey Bogomazov M.V.Lomonosov Moscow State University P.K.Sternberg Astronomical Institute National Space Agency Fesenkov Astrophysical Institute

In 2002,2004 and 2017 we conducted high precision CCD photometry observations of the eclipsing binary system AS *** analysis of the light curves from 1967 to 2017（our data ＋ data from the literature） we obtained photometric elements of the system and found a change in the system＇s orbital eccentricity of ？e = 0.03 ± *** change can indicate that there is a third companion in the system in a highly inclined orbit with respect to the orbital plane of the central binary,and its gravitational influence may cause the discrepancy between observed and theoretical apsidal motion rates of AS Cam.

关键词： binaries:close binaries:eclipsing stars:individual(AS Cam)