|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Thermal camouflage based on the phasechanging material GST显示文摘Camouflage technology has attracted growing interest for many thermal applications.Previous experimental demonstrations of thermal camouflage technology have not adequately explored the ability to continuously camouflage objects either at varying background temperatures or for wide observation angles.In this study,a thermal camouflage device incorporating the phase-changing material Ge2Sb2Te5(GST)is experimentally demonstrated.It has been shown that near-perfect thermal camouflage can be continuously achieved for background temperatures ranging from 30℃ to 50℃ by tuning the emissivity of the device,which is attained by controlling the GST phase change.The thermal camouflage is robust when the observation angle is changed from 0°to 60°.This demonstration paves the way toward dynamic thermal emission control both within the scientific field and for practical applications in thermal information. | Yurui Qu Qiang Li Lu Cai Meiyan Pan Pintu Ghosh Kaikai Du Min Qiu | 2018 | Light(Science & Applications)2018，7，1： | 3 |
| 2 | Vegetation Restoration in Response to Climatic and Anthropogenic Changes in the Loess Plateau, China显示文摘A thorough understanding of the vegetation succession in relation to both climatic changes and anthropogenic activities is vital for the formulation of adaptation strategies that address potential ecosystem challenges.Various climatic factors such as temperature,precipitation,and solar radiation,as well as anthropogenic factors such as ecological engineering and population migration,will affect the conditions for vegetation.However,the relationships among various factors remain unclear and the response of vegetation to climate change and anthropogenic activities in the Loess Plateau of China has not been well established.This study investigated the spatio-temporal characteristics and relationships between vegetation coverage and climatic factors in the Loess Plateau for the period of 1985–2015.Further analysis separated the anthropogenic and climatic factors on vegetation succession based on residual analysis.The results showed that the normalized difference vegetation index(NDVI)followed a significant upward trend with annual change rates of 0.15%during 1985–2015.The trend of human-induced NDVI increase was consistent with the spatial distribution of increasing forest areas in the eastern part of the Loess Plateau.Eco-restoration projects were the main driving factors that promoted vegetation coverage on the Loess Plateau.Furthermore,these results demonstrated that migrants to cities in the Loess Plateau could relieve ecological pressures and promote vegetation restoration.Therefore,the government should strive to increase population mobility and restore vegetation to sustain this particularly fragile ecological environment. | QU Lulu HUANG Yunxin YANG Lingfan LI Yurui | 2020 | Chinese Geographical Science2020，30，1： | 3 |
| 3 | Dynamic evolution and the mechanism of modern gully agriculture regional function in the Loess Plateau显示文摘The agricultural regional type and function are the key theoretical issues in agricultural geography research.Gully agriculture in the Loess Plateau is a new regional type of agricultural system with the coupling development of the modern gully human-earth relationship.The study of its functional changes is of great practical significance for food security,rural revitalization and sustainable development of regional agriculture in the region of interest.This paper analyses the multifunctional change of gully agriculture in the Loess Plateau and its dynamic mechanism by using large-scale remote sensing data,topographic relief amplitude model,and spatial econometric model to understand internal implications for evolution differentiation at the basin level.The results show that:(1)The spatial concentration of production and supply function of agricultural products(APF)in the gully of the Loess Plateau gully is high,while the ecological conservation and maintenance function(ECF),employment and social security function(ESF),cultural heritage and leisure function(CRF)are relatively low.The four functions’spatial distribution has revealed an apparent regularity.(2)APF has been significantly enhanced,which is mainly distributed in point clusters and strips in the farming and pastoral areas in northern Shaanxi to the Yanhe river basin.The high-value areas of ESF are clustered around the urbanized metropolitan circles and urban-rural staggered areas along the Great Wall.ECF is concentrated in areas with significant natural endowments and excellent ecological conditions.CRF is significantly higher in the municipal districts and the surrounding regional central cities.(3)There are noticeable differences in the gully agriculture regional function(GARF)evolution process due to the geographical environment and socio-economic development stages.In this regard,natural factors have tremendously affected APF,ESF,and ECF,while socio-economic factors greatly differ in the four functions.There are still differences in the driving mechanisms of modern gully agriculture evolution types;hence many critical policies in the Loess Plateau can directly affect the function evolution paths.The dynamic evolution of GARF can reflect the general law of rural human-earth system transition in gully areas,thereby providing policy ideas for high-quality development of agriculture in the Loess Plateau. | QU Lulu LI Yurui WANG Yongsheng DONG Shijie WEN Qi | 2022 | Journal of Geographical Sciences2022，32，11： | 1 |
| 4 | Approaching high-performance lithium storage materials by constructing Li_(2)ZnTi_(3)O_(8)@LiAlO_(2) composites显示文摘The Li_(2)ZnTi_(3)O_(8)@Li AlO_(2)was synthesized by a facile high-temperature solid-state route.The LiAlO_(2)modification does not alter the morphology and particle size of Li_(2)Zn Ti_(3)O_(8)(LZTO).The LiAlO_(2)modification improves the structure stability,intercalation/deintercalation reversibility of lithium-ions,and electrochemical reaction activity of Li_(2)Zn Ti_(3)O_(8),and promotes the transfer of lithium ions.Benefited from the unique component,Li_(2)Zn Ti_(3)O_(8)@Li AlO_(2)(8wt%) shows a good rate performance with charge capacities of 203.9,194.8,187.4,180.6,and177.1 mAh·g^(-1)at 0.5,1,2,3,and 5 C,respectively.Nevertheless,pure LZTO only delivers charge capacities of 134.5,109.7,89.4,79.9,and 72.9 mAh·g^(-1)at the corresponding rates.Even at large charge–discharge rate,the Li_(2)Zn Ti_(3)O_(8)@Li AlO_(2)(8wt%) composite indicates a good cycle performance with a high reversible charge/discharge capacity of 263.5/265.8 mAh·g^(-1)at 5 C after 150 cycles.The introduction of LiAlO_(2)on the surface of Li_(2)Zn Ti_(3)O_(8)enhances electronic conductivity of the composite,resulting in the good electrochemical performance of Li_(2)Zn Ti_(3)O_(8)@Li AlO_(2)composite.Li_(2)Zn Ti_(3)O_(8)@LiAlO_(2)(8wt%) composite shows a good potential as an anode material for the next generation of high-performance Li-ion batteries. | Jinpeng Qu Yushen Zhao Yurui Ji Yanrong Zhu Tingfeng Yi | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员