检索结果-南通市图书馆

Engineering stable perovskite X-ray detectors

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第10期11卷 2276-2276页

作者： Kostiantyn Sakhatskyi Maksym v.kovalenko Institute of Inorganic Chemistry Department of Chemistry and Applied BiosciencesETH ZürichCH-8093 ZürichSwitzerland Laboratory for Thin Films and Photovoltaics Empa-Swiss Federal Laboratories for Materials Science and TechnologyCH-8600 DübendorfSwitzerland

Nature Photonics 16,575-581(2022) The past decade has seen the raise of hybrid organic-inorganic lead halide perovskites as highly potent semi-conductors for direct-conversion X-ray *** offering unmatched cost advantages owing to solution growth,and unique defect-tolerant,intrinsic semi-conductor characteristics,these materials suffer from reduced operational stability caused by ionic drift and lattice instability.

关键词： perovskite matched inorganic

Li−Garnet Solid-State Batteries with LLZO Scaffolds

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Accounts of Materials Research 2022年第4期3卷 411-415页

作者： Kostiantyn v.Kravchyk Huanyu Zhang Faruk Okur Maksym v.kovalenko Laboratory for Thin Films and Photovoltaics Empa−Swiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 129CH-8600 DübendorfSwitzerland Laboratory of Inorganic Chemistry Department of Chemistry and Applied BiosciencesETH ZürichCH-8093 ZürichSwitzerland

Li−garnet solid-state batteries(SSBs)have attracted a great deal of attention due to their nonflammability,nontoxicity,and potential to achieve significantly higher energy and power densities compared to those of conventional Li-ion batteries.1−5 Research that began in 20076 and focused primarily on improving the Li-ion conductivity of Li7La3Zr2O12(LLZO)has since evolved into the development of Li−garnet SSBs,encompassing aspects of the LLZO/Li interface,7,8 the electrochemical voltage window of LLZO,9−11 and compatibility with current cathode chemistries.12−15 Nevertheless,an analysis of the literature shows that there is still no clear opinion in the research community on the configuration of future Li−garnet *** particular,opinions differ on the design of the LLZO-based anode layer that accounts for(i)the dynamic expansion and shrinkage of the Li metal(from up to 5−25μm for the area capacity of 1−5 mAh cm^(−2))and(ii)the probability of void formation at the Li/LLZO interface.

关键词： Solid LLZ compatibility

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于统计模型优化的铝合金激光熔覆研究

应用激光 2010年第6期30卷 460-464页

作者：王维夫 v.kovalenko M.Anyakin 耿广刚陈智君姚建华特种装备制造与先进加工技术教育部/浙江省重点实验室(浙江工业大学) 浙江杭州310014 乌克兰国立科技大学激光技术研究所基辅03056

为了解决铝合金零件激光修复与再制造中的气孔等质量问题,以正交试验规则为基础,采用高吸收率半导体激光在铝合金表面设计了熔覆实验,并采用统计模型进行了优化。结果表明,在有效控制保护气氛的前提下,通过优化工艺参数能够显著的减少... 详细信息

为了解决铝合金零件激光修复与再制造中的气孔等质量问题,以正交试验规则为基础,采用高吸收率半导体激光在铝合金表面设计了熔覆实验,并采用统计模型进行了优化。结果表明,在有效控制保护气氛的前提下,通过优化工艺参数能够显著的减少熔覆层中的气孔缺陷。基于统计模型模拟的结果显示,适当降低扫描速度有利于减少涂层中气孔的数量。功率变化的影响相对较小,但可以显著影响涂层的成形质量。分析认为这主要与不同条件下熔覆过程中的气泡的排出行为差异有关。

关键词：铝合金激光熔覆气孔统计模型

Preliminary results of lithological and palynological study of Svobodny,ancient man’s parking relic in Amur region,Russia

在线全文

学校读者我要写书评

暂无评论

Global Geology 2024年第3期27卷 121-131页

作者： kovalenko S.v. Kezina T.v. Kryuchko E.I. Mironov M.A. Center for the Preservation of Historical and Cultural Heritage of the Amur Region Blagoveshchensk 675000Russia Amur State University Blagoveshchensk 675027Russia

A single-layer monument Svobodny,ancient man's parking lot-1,discovered in 2021 as part of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and *** on the results of geomorphological analysis of the territory,the study of artifacts,palynological data,as well as analogy with previously identified and sufficiently studied relics in the region,the existence of the Osinoozersk late Neolithic culture in this territory is *** time of its expansion in the Amur region is determined within the framework of the second half of theⅣmillennium BC to the first half of theⅡmillennium *** preliminary results of palynological analysis suggest the existence of a temperate climate here,was close to the modern one,which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词： Osinoozersk culture palynological spectra Zeya River paleoclimate

Synthesis of RE-Ag,Al-RE-doped sol-gel glass and films for solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2009年第4期27卷 671-674页

作者： A.v.Semchenko v.v.Sidsky v.Е.Gaishun D.L.kovalenko W.Strek Francisk Skorina Gomel State University 246019 Sovetskaya st.104 Gomel Belarus Institute of Low Temperature and Structures Research PAN Okolna st.2 Wroclaw Poland

The paper dealt with the study of fluorescence properties of sol-gel systems doped with rate-earth ions and co-doped with silver. The general problem for these types of inorganic phosphors was a very low absorbance in the visible range. Therefore, a sensitizer of luminescence of the rare-earth ions should be selected and used. The sensitizer should possess a good absorbance in the visible range and strong interaction with the rare-earth ions. In this study silver ions were selected as the sensitizer.

关键词： sol-gel method sol-gel glass and film luminescence and its amplification rare-earth ions silver ions energy transfer

Ferrofluid nucleus phase transitions in an external uniform magnetic field

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2015年第10期24卷 322-330页

作者： B.M.Tanygin S.I.Shulyma v.F.kovalenko M.v.Petrychuk Faculty of Radiophysics Taras Shevchenko National University of Kyiv

The phase transition between a massive dense phase and a diluted superparamagnetic phase has been studied by means of a direct molecular dynamics simulation. The equilibrium structures of the ferrofluid aggregate nucleus are obtained for different values of a temperature and an external magnetic field magnitude. An approximate match of experiment and simulation has been shown for the ferrofluid phase diagram coordinates ＂field-temperature＂. The provided phase coexistence curve has an opposite trend comparing to some of known theoretical results. This contradiction has been discussed. For given experimental parameters, it has been concluded that the present results describe more precisely the transition from linear chains to a dense globes phase. The theoretical concepts which provide the opposite binodal curve dependency trend match other experimental conditions： a diluted ferrofluid, a high particle coating rate, a high temperature,and/or a less particles coupling constant value.

关键词： ferrofluid aggregate phase diagram molecular dynamics

A Mechanism of Solar variability Effect on Radiative Balance of the Earth Atmosphere

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2005年第5期25卷 450-459页

作者： G.A.Zherebtsov v.A.kovalenko S.I.Molodykh Institute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 Russia

Possible mechanisms of solar-climatic connections, which may be of importance as over short and long time intervals, are discussed. The variations of energetic balance of Earth's climatic system for the last fifty years are estimated. It is ascertained that the disbalance between the flux of solar energy that comes to the Earth and radiates to space is of 0.1% for the last ten years. The suggested mechanism makes it possible to explain not only the observed variation of the enthalpy of the Earth's climatic system for the period 1910-1980, but also the climate anomalies during last thousand years: the climate optimum in 12 century, and"small glacial period" in 16-17 centuries.

关键词：太阳活动地球气候系统宇宙

Swelling/extraction test of Russian reservoir heavy oil by liquid carbon dioxide

在线全文

学校读者我要写书评

暂无评论

Petroleum Exploration and Development 2018年第5期45卷 918-926页

作者： LOBANOv A A SHHEKOLDIN K A STRUCHKOv I A ZvONKOv M A HLAN M v PUSTOvA E J kovalenko v A ZOLOTUKHIN A B Northern Arctic Federal University JSC RITEK Saint-Petersburg Mining University

The mass transfer between heavy oil and liquid carbon dioxide and the changes of the heavy phase(mixture of heavy oil and CO_2) and light phase(pure CO_2) in the mixture were tested in lab with heavy oil samples from Russia. The experimental results showed that the heavy oil hardly expanded when the concentration of carbon dioxide in the mixture was 10%. When the concentration of carbon dioxide was higher than 26%, the volume of the heavy phase decreased, and the viscosity of the heavy phase increased exponentially as the light components extracted from the heavy oil exceeded the carbon dioxide saturated in the heavy oil. When the concentration of carbon dioxide in the mixture was 26%, the effect of viscosity reducing to the heavy phase was the strongest. The density of the light and heavy phases, volume factor, and solubility of gas and flash viscosity of heavy phase all increased with the rise of carbon dioxide concentration in the mixture. The best concentration of carbon dioxide in the mixture was 26%, when the heavy oil expanded the most and the viscosity of the heavy phase was the lowest. When the concentration of carbon dioxide in the mixture was between 10% and 26%, the volume of the light phase was the smallest and the oil displacement effect was the best.

关键词： enhanced oil recovery liquid CO2 heavy oil swelling test extract test phase behavior

Solar Activity and the Climate of Prebaikalia

在线全文

学校读者我要写书评

暂无评论

空间科学学报 2005年第5期25卷 474-477页

作者： v.A.kovalenko G.A.Zherebtsov S.I.Molodykh Institute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 RussiaInstitute of Solar-Terrestrial Physics Siberian Branch Russian Academy of Sciences Irkutsk 664033 Russia

This paper presents convincing evidence for the reality of manifestations of solar variability in climate characteristics of the Prebaikalia. A numerical estimate is obtained of this influence on ground air temperature. It is shown that the main meaningful variations in air temperature in the region for the period1881-1960 were caused by solar activity. Since the 1960s till the present, with the influence of solar variability continuing, a clear-cut influence of another factor has been observed, the role of which has been steadily increasing, and in the hst decade it has now exceeded the contribution of solar variability. Research results on the variations in hydrological characteristics of Lake Baikal and the Angara river and their connection with solar activity are presented. It is shown that these characteristics are closely correlated with the duration of solar cycles.

关键词：太阳活动气候变化大气 GAT