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Influence of structural factors on the strength properties of aluminum alloys under shock wave loading

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Matter and Radiation at Extremes 2018年第4期3卷 145-158页

作者： s.v.Razorenov Institute of Problems of Chemical Physics RAs ChernogolovkaRussia National Research Tomsk state University TomskRussia

The results of measurements of the strength characteristics-Hugoniot elastic limit and spall strength of aluminum and aluminum alloys in different structural states under shock wave loading are ***-crystals and polycrystalline technical grade aluminumА1013 and aluminum alloysА2024,АА6063Т6,А1421,A7,А7075,А3003,A5083,АА1070 in the initial coarse-grained state and ultrafine-grained or nanocrystalline structural state were *** refinement of the grain structure was carried out by different methods of s.v.re plastic deformation such as Equal Chanel Angular Pressing,Dynamic Channel Angular Pressing,High-Pressure Torsion and Accumulative *** strength characteristics of shock-loaded samples in different structural states were obtained from the analysis of the evolution of the free surface velocity histories recorded by means of laser Doppler velocimeter *** strain rates before spall fracture of the samples were in the range of 10^(4)-10^(5 )s^(-1),the maximum pressure of shock compression did not exceed 7 *** results of these studies clearly demonstrate the influence of structural factors on the resistance to high-rate deformation and dynamic fracture,and it is much less than under the static and quasi-static loading.

关键词： Aluminum alloys shock wave loading Ultrafine-grained structure Dynamic strength properties

spatio-Temporal Change of Atmospheric Precipitation on Territory of North-West of Ukraine

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Journal of Atmospheric science Research 2019年第4期2卷 1-4页

作者： Budnik s.v. The Central Geophysical Observatory of a Name of B.sreznevskogo the state Emergency service of Ukraine KievUkraine

The direction of the trend of precipitation over time is an important characteristic for both theoretical and practical *** presented study is devoted to the analysis of changes in the territory of the trend of precipitation over the year over *** the present stage of climate change in the north-west of Ukraine,there is a general tendency to increase rainfall over the *** trend is not the same across the territory and depends on the height and latitude of the *** amount of precipitation varies both in space and in time,however,the distribution of the characteristics of the rains themselves(intensity,duration and others)continue to remain similar throughout the *** revealed features of changes in the amount of precipitation in space and time can be useful in studying the unevenness of wetting,forecasting floods,changes in erosion activity,etc.

关键词： Precipitation characteristics Trend territory Meteorological station Long-term observations

Introduction to Thermo-Photo-Electronics

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Journal of Electronic & Information systems 2023年第1期5卷 51-66页

作者： stanislav ordin The Russian Academy of sciences Saint Petersburg119991Russia

Building the foundations of Thermo-Photo-Electronics became possible only after the correction of thermodynamic errors in the traditional theory of semiconductor Electronics and *** is these errors that determined the output of the asymptotics of the operating parameters of semiconductor electronic devices,in particular,both the saturation of the limiting clock frequency of processors,and the saturation of the efficiency of both thermoelectric and photoelectric *** in semiconductors,although these thermodynamic errors manifested themselves not only in the instrumental,but also in the technological aspect,they could not prohibit semiconductor Electronics itself,unlike Electronics based on other ***’s just that a number of qualitative mistakes were made in the theory of semiconductor devices and photo *** this work,it is shown that the energy band diagram of semiconductor contacts itself was constructed with a significant omission-without taking into account the temperature force on the *** the same time,because of the incorrect calculation of currents according to the outdated formulas of Richardson-Langmuir-Deshman,there were also *** the practitioners compensated for the errors of the theory with“empirical corrections”.so electronics engineers often made devices not according to a strict theory(which simply did not exist until now),but on a hunch and according to empirical local *** only the correction of the historical mistakes made it possible to expand the phenomenology of the description of processes in a solid Body,on the basis of which it is possible to make calculations of highly efficient elements of Photo-Thermo-Electronics.

关键词： Phenomenology Potential barriers P-n-junction Prigogine local entropy production Richardson-Langmuir models Local thermo-EMF

Dendritic spine degeneration:a primary mechanism in the aging process

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Neural Regeneration Research 2025年第6期20卷 1696-1698页

作者： Gonzalo Flores Leonardo Aguilar-Hernández Fernado García-Dolores Humberto Nicolini Andrea Judith vázquez-Hernández Hiram Tendilla-Beltrán Instituto de Fisiología Benemérita Universidad Autónoma de Puebla(BUAP)PueblaMexico Instituto de Ciencias Forenses(INCIFO) Tribunal Superior de Justicia de la Ciudad de México(TSJCDMX).Mexico CityMexico Instituto Nacional de Medicina Genómica(INMEGEN) Mexico CityMexico

Recent reports suggest that aging is not solely a physiological process in living beings;instead, it should be considered a pathological process or disease(Amorim et al., 2022). Consequently, this process involves a wide range of factors, spanning from genetic to environmental factors, and even includes the gut microbiome(GM)(Mayer et al., 2022). All these processes coincide at some point in the inflammatory process, oxidative stress, and apoptosis, at different degrees in various organs and systems that constitute a living organism(Mayer et al., 2022;AguilarHernández et al., 2023).

关键词： aging process stress

MORPHOTECTONICs OF THE BAsEMENT sURFACE OF THE WEsT sIBERIAN BAsIN WITHIN NADYM-TAZ INTERFLUvE

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Geotectonica et Metallogenia 2003年第1期27卷 11-23页

作者： DEYEv E.v. ZINOvIEv s.v. Institute of Geology sB RAs 630090 Koptyug Ave. 3 Novosibirsk RussiaInstitute of Geology SB RAS 630090 Koptyug Ave. 3 Novosibirsk Russia

The map of reflecting horizon A, plotted on the basis of regional geophysical materials, yieldsinformation about the bottom topography of sedimentary cover of the West-siberian Basin within Nadym-Taz interfluve. Through morphotectonic analysis about this surface, the authors are able tounderstand the distribution characteristics of the main topographic irregularities, with the blockstructure of the lower cover floors and underlying complexes as the *** largest irregularities are caused by the presence of three regional altitude steps, which show a regional tendency of basement being submerged in the north-north-east direction. Within these irregularities, the authors have distinguished some regions, which can be divided, based on the characteristics of morphostructural distribution, into two groups, i.e., areal (Nadym, Tol'ka, Urengoy)and belt (Tarko-sale, Russko-Chasel'ka and Messoyakha). The first ones represent quasihomogeneous blocks, whose surfaces are complicated by irregular low-amplitude elevations and troughs and low-gradient zones with gradient values being up to 0.03, or they submerge stepwise, with the leveled areas being separated by zones with high gradients (0.07-0.15). The morphostructure of the other group of regions is characterized by the en-echelon distribution of contrastingly positive and negative elements with high values of slope gradients (higher than 0.1-0.2).

关键词： morphotectonics basement siberia interfluve

MORPHOTECTONICs OF THE BAsEMENT sURFACE OF THE WEsT sIBERIAN BAsIN WITHIN NADYM-TAZ INTERFLUvE

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Geotectonica et Metallogenia 2003年第Z1期 11-23页

作者： DEYEv E.v.,ZINOvIEv s.v. Institute of Geology sB RAs 630090 Koptyug Ave. 3 Novosibirsk Russia Institute of Geology sB RAs 630090 Koptyug Ave. 3 Novosibirsk Russia

The map of reflecting horizon A, plotted on the basis of regional geophysical materials, yields information about the bottom topography of sedimentary cover of the West-siberian Basin within Nadym-Taz interfluve. Through morphotectonic analysis about this surface, the authors are able to understand the distribution characteristics of the main topographic irregularities, with the block structure of the lower cover floors and underlying complexes as the *** largest irregularities are caused by the presence of three regional altitude steps, which show a regional tendency of basement being submerged in the north-north-east direction. Within these irregularities, the authors have distinguished some regions, which can be divided, based on the characteristics of morphostructural distribution, into two groups, i.e., areal (Nadym, Tol'ka, Urengoy) and belt (Tarko-sale, Russko-Chasel'ka and Messoyakha). The first ones represent quasi-homogeneous blocks, whose surfaces are complicated by irregular low-amplit

关键词： morphotectonics basement siberia interfluve

A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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Journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng Wu Hao Gao Qingqing Wang Pengfei Lv sam s.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University school of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corros.v.ness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnsO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 v even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

Evaluation of genetic potential of the polyvoltine silkworm (Bombyx mori L.) germplasm and identification of parents for breeding programme

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2006年第3期7卷 215-220页

作者： RAO C.G.P. sEsHAGIRI s.v. RAMEsH C. IBRAHIM BAsHA K. NAGARAJU H. CHANDRAsHEKARAIAH Andhra Pradesh state sericulture Research and Development Institute (APSSRDI) Kirikera Hindupur-515 211 India

In the present study, polyvoltine germplasm stock ofAndhra Pradesh state sericulture Research and Development, Institute （APssRDI） was evaluated for its performance based on quantitative and qualitative traits. Twenty-one oval and 10 peanut cocoon shaped lines were reared in different seasons of the year. since the polyvoltines are non-diapausing, six generations were reared and evaluated for various economically important traits based on evaluation index and sub-ordinate function statistical methods. Ten top ranked lines obtained by using both the methods were identified as potential parental strains. Among oval lines, APMI4, APMI 1, APMIs, APMW9, and APMI9, and among peanut lines APMD5, APMDI, APMD3, APMD9 and APMD8 were selected as base material. The identified high yielding lines will be used in various breeding programmes as initial parents for the synthesis of superior polyvoltine breeds/hybrids.

关键词： Polyvoltine silkworm Germplasm Performance Evaluation

Improved strength and ductility of high alloy containing Al–12Zn–3Mg–2.5Cu alloy by combining non-isothermal step rolling and cold rolling

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International Journal of Minerals,Metallurgy and Materials 2017年第2期24卷 179-185页

作者： v.v.Ravikumar s.Kumaran Department of Metallurgical and Materials Engineering National Institute of TechnologyTamil Nadu 620015India

Al-12Zn-3Mg-2.5Cu alloy was prepared using a liquid metallurgy route under the optimized conditions. A sample cut from the ingot was rolled non-isothermally from 400℃ to 100℃ in 100℃ steps, with 15% reduction in thickness; it was then cold rolled isothermally at room temperature for 85% reduction. The cold-rolled alloys were characterized by electron microscopy, hardness test, and tensile test to elucidate their structural evolution and evaluate their mechanical behavior. In the results, the cast alloy consists of a-aluminum and various intermetallic compounds. These compounds are segregated along the grain boundaries, which makes the alloy difficult to roll at room tem- perature. The combined effect of non-isothermal step rolling and cold rolling results in the nano/microsized compounds distributed uniformly in the matrix. The hardness is substantially increased after rolling. This increase in hardness is attributed to the ultra-fine grain size, fine-scale intermetallic compounds, and structural defects （e.g., dislocations, stacking faults, and sub-grains）. The ultimate tensile strength of the rolled alloy is approximately 628 MPa with 7% ductility.

关键词： aluminum zinc magnesium copper alloys non-isothermal cold rolling mechanical properties intermetallic compounds struc-ture defects