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| 1 | 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents显示文摘Syncope belongs to the transient loss of consciousness(TLOC), characterized by a rapid onset, short duration, and spontaneous complete recovery. It is common in children and adolescents, accounting for 1% to 2% of emergency department visits.Recurrent syncope can seriously affect children's physical and mental health, learning ability and quality of life and sometimes cardiac syncope even poses a risk of sudden death. The present guideline for the diagnosis and treatment of syncope in children and adolescents was developed for guiding a better clinical management of pediatric syncope. Based on the globally recent development and the evidence-based data in China, 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents was jointly prepared by the Pediatric Cardiology Society, Chinese Pediatric Society, Chinese Medical Association(CMA)/Committee on Pediatric Syncope, Pediatricians Branch, Chinese Medical Doctor Association(CMDA)/Committee on Pediatric Cardiology, Chinese College of Cardiovascular Physicians, Chinese Medical Doctor Association(CMDA)/Pediatric Cardiology Society, Beijing Pediatric Society, Beijing Medical Association(BMA). The present guideline includes the underlying diseases of syncope in children and adolescents, the diagnostic procedures, methodology and clinical significance of standing test and headup tilt test, the clinical diagnosis vasovagal syncope, postural orthostatic tachycardia syndrome, orthostatic hypotension and orthostatic hypertension, and the treatment of syncope as well as follow-up. | Cheng Wang Yaqi Li Ying Liao Hong Tian Min Huang Xiangyu Dong Lin Shi Jinghui Sun Hongfang Jin Junbao Du Jindou An Jie Chen Mingwu Chen Qi Chen Sun Chen Yonghong Chen Zhi Chen Adolphus Kai-tung Chau Junbao Du Zhongdong Du Junkai Duan Hongyu Duan Xiangyu Dong Lin Feng Lijun Fu Fangqi Gong Yonghao Gui Ling Han Zhenhui Han Bing He Zhixu He Xiufen Hu Yimin Hua Guoying Huang Min Huang Ping Huang Yujuan Huang Hongfang Jin Mei Jin Bo Li Fen Li Tao Li Xiaohui Li Xiaoyan Liu Yan Li Haitao Lv Tiewei Lv Zipu Li Luyi Ma Silin Pan Yusheng Pang Hua Peng Yuming Qin Jie Shen Lin Shi Kun Sun Jinghui Sun Hong Tian Jie Tian Cheng Wang Hong Wang Lei Wang Jinju Wang Wendi Wang Yuli Wang Rongzhou Wu Tianhe Xia Yanyan Xiao Chunhong Xie Yanlin Xing Zhenyu Xiong Baoyuan Xu Yi Xu Hui Yan Shiwei Yang Qijian Yi Xia Yu Xianyi Yu Yue Yuan Hongyan Zhang Huili Zhang Li Zhang Qingyou Zhang Xi Zhang Yanmin Zhang Zhiwei Zhang Cuifen Zhao Bin Zhou Hua Zhu | 2018 | Science Bulletin2018，63，23： | 54 |
| 2 | Antiviral innate immunity pathways显示文摘最近的研究揭开了激活主人的二个发信号小径对病毒的感染的天生的免疫。小径之一利用像使用费的受体(TLR ) 的成员检测通过 endocytosis 进入内涵体的病毒的家庭。TLR 小径通过最终导致抄写因素 NF-kappaB, IRF3 和 IRF7 的激活的几发信号的蛋白质导致干扰素生产。另外的抗病毒的小径为细胞内部的病毒的双 stranded RNA 把 RNA helicase RIG-I 用作受体。RIG-I 通过最近识别的适配器蛋白质 MAVS 激活 NF-kappaB 和 IRF,包含居住在 mitochondrial 膜的蛋白质的一个卡片领域。MAVS 为抗病毒的天生的免疫是必要的,但是它也用作丙肝病毒(HCV ) 的一个目标,它采用病毒的朊酶劈开 MAVS 离开线粒体,从而允许 HCV 逃离主人免疫系统。 | Rashu B Seth Lijun Sun Zhijian J Chen | 2006 | Cell Research2006，16，2： | 45 |
| 3 | Transplantation of UC-MSCs on collagen scaffold activates follicles in dormant ovaries of POF patients with long history of infertility显示文摘Premature ovarian failure(POF) is a refractory disease for clinical treatment with the goal of restoring fertility. In this study,umbilical cord mesenchymal stem cells on a collagen scaffold(collagen/UC-MSCs) can activate primordial follicles in vitro via phosphorylation of FOXO3 a and FOXO1. Transplantation of collagen/UC-MSCs to the ovaries of POF patients rescued overall ovarian function, evidenced by elevated estradiol concentrations, improved follicular development, and increased number of antral follicles. Successful clinical pregnancy was achieved in women with POF after transplantation of collagen/UC-MSCs or UC-MSCs. In summary, collagen/UC-MSC transplantation may provide an effective treatment for POF. | Lijun Ding Guijun Yan Bin Wang Lu Xu Yan Gu Tong Ru Xiaoying Cui Lei Lei Jingyu Liu Xiaoqiang Sheng Bin Wang Chunxue Zhang Yanjun Yang Ruiwei Jiang Jianjun Zhou Na Kong Feifei Lu Huaijun Zhou Yannan Zhao Bing Chen Yali Hu Jianwu Dai Haixiang Sun | 2018 | Science China(Life Sciences)2018，61，12： | 43 |
| 4 | LncRNA Dum interacts with Dnmts to regulate Dppa2 expression during myogenic differentiation and muscle regeneration显示文摘新兴的研究在少些在染色质水平,但是相对调整基因表示记录长非编码的 RNA (LncRNAs ) 的角色被知道他们怎么调整 DNA methylation。这里,我们识别 lncRNA, Dum (发展联系 pluripotency 2 (Dppa2 ) 在上游的有约束力的肌肉 lncRNA ) 在骨胳的 myoblast 房间。Dum 的表示动态地在 vitro 并且在 vivo 在 myogenesis 期间被调整。它被在 myoblast 区别之上有约束力的 MyoD transcriptionally 也导致。功能的分析证明它支持 myoblast 区别和导致损坏的肌肉新生。机械学地, Dum 被发现它的附近的基因到沉默, Dppa2,在通过招募的 cis Dnmt1, Dnmt3a 和 Dnmt3b。而且, intrachromosomal 在 Dum 地点和 Dppa2 倡导者之间循环为 Dum/Dppa2 相互作用是必要的。一起,我们识别了与 Dnmts 交往调整 myogenesis 的新奇 lncRNA。 | Lijun Wang Yu Zhao Xichen Bao Xihua Zhu Yvonne Ka-yin Kwok Kun Sun Xiaona Chen Yongheng Huang Ralf Jauch Miguel A Esteban Hao Sun Huating Wang | 2015 | Cell Research2015，25，3： | 34 |
| 5 | The role of autophagy in cardiac hypertrophy显示文摘Autophagy 从更低的优核质在自然被保存到哺乳动物并且是一重要自我吃, degradative processthat 贡献过剩材料的消除。心脏的肥大被过量 proteinsynthesis,增加的 cardiomyocyte 尺寸,和变厚的室的墙首先描绘并且是支持 arrhythmiaand 心失败的一个主要风险因素。在最近的年里, cardiomyocyte autophagy 被认为在控制 hypertrophicresponse 起一个作用。然而,在心脏的肥大的 cardiomyocyte autophagy 的有益或加重的角色仍然是在心脏的肥大的 cardiomyocyte autophagy 的准确机制进一步要求的 controversial.The 学习。在这评论,我们在心脏的肥大与 autophagy 联系的 summarizethe 争吵并且在心脏的肥大的 thedevelopment 提供卓见进 autophagy 的角色。我们断定未来研究应该强调在 autophagy andthe 之间的关系心脏的肥大的不同阶段,以及 autophagic 流动和选择 autophagy。Autophagy 将是为心脏的肥大的一个 potentialtherapeutic 目标。 | Lanfang Li Jin Xu Lu He Lijun Peng Qiaoqing Zhong Linxi Chen Zhisheng Jiang | 2016 | Acta Biochimica et Biophysica Sinica2016，48，6： | 30 |
| 6 | Targeted gene disruption by use of a group 11 intron (targetron) vector in Clostridium acetobutylicum显示文摘 | Lijun Shao Shiyuan Hu Yi Yang Yang Gu Jun Chen Yunliu Yang Weihong Jiang ShengYang | 2007 | Cell Research2007，17，11： | 23 |
| 7 | High-resolution remote sensing mapping of global land water显示文摘Land water, one of the important components of land cover, is the indispensable and important basic information for climate change studies, ecological environment assessment, macro-control analysis, etc. This article describes the overall study on land water in the program of global land cover remote sensing mapping. Through collection and processing of Landsat TM/ETM+, China's HJ-1 satellite image, etc., the program achieves an effective overlay of global multi-spectral image of 30 m resolution for two base years, namely, 2000 and 2010, with the image rectification accuracy meeting the requirements of 1:200000 mapping and the error in registration of images for the two periods being controlled within 1 pixel. The indexes were designed and selected reasonably based on spectral features and geometric shapes of water on the scale of 30 m resolution, the water information was extracted in an elaborate way by combining a simple and easy operation through pixel-based classification method with a comprehensive utilization of various rules and knowledge through the object-oriented classification method, and finally the classification results were further optimized and improved by the human-computer interaction, thus realizing high-resolution remote sensing mapping of global water. The completed global land water data results, including Global Land 30-water 2000 and Global Land 30-water 2010, are the classification results featuring the highest resolution on a global scale, and the overall accuracy of self-assessment is 96%. These data are the important basic data for developing relevant studies, such as analyzing spatial distribution pattern of global land water, revealing regional difference, studying space-time fluctuation law, and diagnosing health of ecological environment. | LIAO AnPing CHEN LiJun CHEN Jun HE ChaoYing CAO Xin CHEN Jin PENG Shu SUN FangDi GONG Peng | 2014 | Science China Earth Sciences2014，57，10： | 22 |
| 8 | Genome-Wide Association Studies of Image Traits Reveal Genetic Architecture of Drought Resistance in Rice显示文摘理解植物怎么对干旱作出回应能有益于繁殖的干旱抵抗(医生) 。用一台非破坏性的 phenotyping 设备,为 507 米饭就职的 51 个基于图象的特点(i 特点) 被提取。这些 i 特点能被用来监视干旱回答 ? 并且高评估医生可遗传性和这些特点的大变化在自然人口在干旱应力下面被观察。染色体宽的协会研究(GWAS )?i 特点和传统的医生特点识别了 470 协会 loci,某包含知道医生相关的基因。这 470 loci, 443 loci (94%) 用 i 特点被识别, 437 loci (93%) 与以前报导的医生相关的量的特点 loci,和 313 loci (66.6%)co 局部性被 GWAS reproducibly 在不同的年里识别。协会网络,基于 GWAS 建立了结果,揭示中心 i 特点和中心 loci。这表明把的可行性和必要性复杂医生特点进可继承、简单的 i 特点。作为原则的证明,我们说明了这条综合途径的力量以前识别 unreported 医生相关的基因。OsPP15 与中心 i 特点被联系,并且它在医生的角色被基因转变实验证实。而且, i 特点能被用于医生连接分析,并且 69 个 i 特点地点协会被 recombinant 的 GWAS 和连接分析识别生来的线人口。最后,我们证实了 i 特点的关联在这个领域里搀。我们的学习为医生为原因的基因的基因解剖和发现提供一条有希望的新奇途径。 | Zilong Guo Wanneng Yang Yu Chang Xiaosong Ma Haifu Tu Fang Xiong Ni Jiang Hui Feng Chenglong Huang Peng Yang Hu Zhao Guoxing Chen Hongyan Liu Lijun Luo Honghong Hu Qian Liu Lizhong Xiong | 2018 | Molecular Plant2018，11，6： | 21 |
| 9 | Status quo of soil petroleum contamination and evolution of bioremediation显示文摘Along with the rapid development of oil industries internationally,petroleum prospecting and exploitation activities are growing intensively.Especially in China,with the fastest economic growth in the world and shortage of petroleum resources,we are leading the practices of petroleum deep exploitation.Obviously,the risk of damage to the natural environment from these activities is high.Oil contamination in soils and groundwater is becoming a big issue along with pesticide pollution,which makes organic pollution prevention and control (OPPC) much more complex.In this paper,based on recent research on oil-contaminated soil at home and abroad,we make comments on the remediation technologies for polluted soil,emphasizing bioremediation techniques and degradation mechanisms in order to push forward research into bound organic pollution prevention and control (OPPC),especially in China. | Du Weidong Wan Yunyang Zhong Ningning Fei Jiajia ZhangZhihuan Chen Lijun Hao Jiming | 2011 | Petroleum Science2011，8，4： | 19 |
| 10 | Beneficial effects of Houttuynia cordata polysaccharides on “two-hit” acute lung injury and endotoxic fever in rats associated with anti-complementary activities显示文摘Houttuynia cordata Thunb. is a traditional herb used for clearing heat and eliminating toxins,and has also been used for the treatment of severe acute respiratory syndrome(SARS). In vitro, the crude H. cordata polysaccharides(CHCP) exhibited potent anti-complementary activity through both the classical and alternative pathways by acting on components C3 and C4 of the complement system without interfering with the coagulation system. This study was to investigate the preventive effects of CHCP on acute lung injury(ALI) induced by hemorrhagic shock plus lipopolysaccharide(LPS) instillation(two-hit)and LPS-induced fever in rats. CHCP significantly attenuated pulmonary injury in the 'two-hit' ALI model by reducing pulmonary edema and protein exudation in bronchoalveolar lavage fluid(BALF). In addition, it reduced the deposit of complement activation products in the lung and improved oxidantantioxidant imbalance. Moreover, CHCP administration inhibited fever in rats, reduced the number of leukocytes and restored serum complement levels. The inhibition on the inappropriate activation of complement system by CHCP may play an important role in its beneficial effects on inflammatory diseases. The anti-complementary polysaccharides are likely to be among the key substances for the heatclearing function of H. cordata. | Yan Lu Yun Jiang Lijun Ling Yunyi Zhang Hong Li Daofeng Chen | 2018 | Acta Pharmaceutica Sinica B2018，8，2： | 18 |
| 11 | A landscape shape index-based sampling approach for land cover accuracy assessment显示文摘Spatial sampling design is one of the key steps in land cover accuracy assessment,and many traditional sampling approaches may not achieve credible spatial sampling due to the high spatial heterogeneity of land cover.This paper characterizes the spatial heterogeneity with three-level LSIs and determines the subsequent sample sizes and their spatial distributions.The three-level LSIs are rLSI in a region,cLSI for each land cover class and uLSI in each geographic sampling unit in the region.The rLSIs are used to derive appropriate sample sizes in the target regions.The cLSIs are used to assure that larger sample numbers are allocated to land cover classes with higher spatial heterogeneity.The uLSIs provide useful measures for selecting optimal geographic units in which sample sites will be located.This LSI-based sampling approach can derive the sample sizes and determine their distributions in an adaptive way according to the spatial heterogeneity.An experimental case study further demonstrates that the LSI-based sampling approach obtains more appropriate sample sizes for each region,sufficient sample numbers for rare classes,and optimal sample distributions in the geographical space. | CHEN Fei CHEN Jun WU Hao HOU DongYang ZHANG WeiWei ZHANG Jun ZHOU XiaoGuang CHEN LiJun | 2016 | Science China(Information Sciences)2016，59，12： | 17 |
| 12 | Electrochemical behavior of zirconium in molten NaCl-KCl-K_2ZrF_6 system显示文摘The electrochemical reduction of Zr4+(complex) ions in NaCl-KCl-K2ZrF6 molten salt on Pt electrode was investigated using cyclic voltammetry and square wave voltammetry at 1023 K.Two cathodic reduction peaks related to Zr4+/Zr2+ and Zr2+/Zr steps were observed in the cyclic voltammograms.The result was also confirmed by square wave voltammetry.The diffusion coefficient of Zr4+(complex) ions at 1023 K in NaCl-KCl-K2ZrF6 melt,measured by cyclic voltammetry,is about 4.22×10-6 cm2/s.The characterization of the deposits obtained by potentiostatic electrolysis at different potentials was investigated by XRD,and the results were well consistent with the electrochemical reduction mechanism of Zr4+(complex) ions. | WU Yanke XU Zhigao CHEN Song WANG Lijun LI Guoxun | 2011 | Rare Metals2011，30，1： | 16 |
| 13 | Bi-directional Selection in Upland Rice Leads to Its Adaptive Differentiation from Lowland Rice in Drought Resistance and Productivity显示文摘Drought resistance is required in rice breeding to address the challenge of frequent droughts . However, the evolutionary mechanism of rice drought resistance is not fully understood. We investigated the genetic differentiation between upland and lowland rice domesticated in agro-ecosystems with contrasting water-soil conditions using genome-wide SNPs. We estimated morphological differences among upland and lowland rice in drought resistance and productivity through common garden experiments. Upland rice had better drought resistance but poorer productivity. The negative correlations between traits of drought resistance and productivity are attributed to the underlying genetic trade-offs through tight linkages (e.g., DCA1 and OsCesA7) or pleiotropic effects (e.g., LAX1). The genetic trade-offs are comm on and greatly shape the evolutio n of drought resista nee in upland rice . In genomic regions associated with both productivity and drought resistance, signs of balancing selection were detected in upland rice, while signs of directional selection were detected in lowland rice, potentially contributing to their adaptive differentiation. Signs of balancing selection in upland rice resulted from bi-directional selection during its domestication in drought-prone upland agro-ecosystems.Using genome-wide association analysis, we ide ntified several valuable quantitative trait loci associated with drought resista nee, for which highly differentiated genes should be considered candidates. Bi-directional selection breaking tight linkages by accumulating recombination events would be applicable in breeding water-saving and droughtresistance rice. | Hui Xia Zhi Luo Jie Xiong Xiaosong Ma Qiaojun Lou Haibin Wei Jie Qiu Hua Yang Guolan Liu Longjiang Fan Liang Chen Lijun Luo | 2019 | Molecular Plant2019，12，2： | 16 |
| 14 | High salt primes a specific activation state of macrophages, M(Na)显示文摘 | Wu-Chang Zhang Xiao-Jun Zheng Lin-Juan Du Jian-Yong Sun Zhu-Xia Shen Chaoji Shi Shuyang Sun Zhiyuan Zhang Xiao-qing Chen Mu Qin Xu Liu Jun Tao Lijun Jia Heng-yu Fan Bin Zhou Ying Yu Hao Ying Lijian Hui Xiaolong Liu Xianghua Yi Xiaojing Liu Lanjing Zhang Sheng-Zhong Duan | 2015 | Cell Research2015，25，8： | 15 |
| 15 | Bio-leaching effects of Leptospirillum ferriphilum on the surface chemical properties of pyrite显示文摘Leptospirillum ferriphilum cultured using different energy sources(either soluble ferrous ion or pyrite) changed the surface properties of pyrite.Cell adsorption,zeta-potential,hydrophobicty,FT-IR spectra and surface morphology were investigated.Adhesion of bacterial cells to the pyrite surface is a fast process.Furthermore,the adsorption of cells grown in pyrite is greater than of cells grown in soluble ferrous ion.The Iso-Electric Point(IEP) of pyrite treated with L.ferriphilum approaches that of the cells themselves.The contact angle of the pyrite surface was observed to decrease due to the surface formation of some hydrophilic substances during bio-leaching.Changes in pyrite surface properties after bacterial treatment support the idea that ferric ion plays an important role and that indirect bio-oxidation is the principal mechanism of pyrite bio-leaching. | GU, Guohua SU, Lijun CHEN, Minglian SUN, Xiaojun ZHOU, Hongbo | 2010 | Mining Science and Technology2010，20，2： | 14 |
| 16 | PepperHub, an Informatics Hub for the Chili Pepper Research Community显示文摘 | Feng Liu Huiyang Vu Yingtian Deng Jingyuan Zheng Minglei Liu Lijun Ou Bozhi Yang Xiongze Dai Yanqing Ma Shengyu Feng Shuang He Xuefeng Li Zhuqing Zhang Wenchao Chen Shudong Zhou Rong Chen Minmin Liu Sha Yang Ruimin Wei Huadong Li Feng Li Bo Ouyang Xuexiao Zou | 2017 | Molecular Plant2017，10，8： | 13 |
| 17 | Research on the feature extraction of DC space charge behavior of oil-paper insulation显示文摘As the ultra high DC voltage grid comes into an important stage in the ‘Twelfth Five-year Plan’ of China, the requirement on the operation safety of power equipment needs to be improved. Oil-paper insulation plays a significant role as the main insulation material of many key power equipments. The space charge behaviors of oil-paper insulation not only affect the dielectric strength, but also relate to the stability and security of power transmission facilities. Until now, the research on the space charge behaviors of oil-paper insulation remains on the stage of objective description and phenomenon explanation, thus it is very urgent to make some feature extractions on the test results in order to further investigate the DC space charge behaviors of oil-paper insulation. In this paper, based on the large numbers of test data in the first stage, data mining and feature extractions were performed on the DC space charge behavior of oil-paper insulation. The variation laws of some key characteristic parameters obtained in different experiment conditions such as the total charge injection amount, apparent charge mobility, and trap energy distribution were analyzed. In addition, the distribution of trapping level inside oil-paper was calculated by using the PEA test results based on the mechanism of the isothermal decay current, which realized the approximate calculation of trap depth by charge decay characteristics. What’s more, the exponential injection and decay equations of DC space charge changing with time were acquired for the first time, and the physical meanings of related parameters were defined. This has laid a foundation for the prediction and simulation of space charge in the oil-paper insulation. | TANG Chao LIAO RuiJin CHEN George YANG LiJun | 2011 | Science China(Technological Sciences)2011，54，5： | 13 |
| 18 | Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches:A case of ragweed(Ambrosia artemisiifolia L.)distribution in China显示文摘Invasive exotic species pose a growing threat to the economy,public health,and ecological integrity of nations worldwide. Explaining and predicting the spatial distribution of invasive exotic species is of great importance to prevention and early warning efforts. We are investigating the potential distribution of invasive exotic species,the environmental factors that influence these distributions,and the ability to predict them using statistical and information-theoretic approaches. For some species,detailed presence/absence occurrence data are available,allowing the use of a variety of standard statistical techniques. However,for most species,absence data are not available. Presented with the challenge of developing a model based on presence-only information,we developed an improved logistic regres-sion approach using Information Theory and Frequency Statistics to produce a relative suitability map. This paper generated a variety of distributions of ragweed(Ambrosia artemisiifolia L.) from logistic regression models applied to herbarium specimen location data and a suite of GIS layers including climatic,topographic,and land cover information. Our logistic regression model was based on Akaike's Information Criterion(AIC) from a suite of ecologically reasonable predictor variables. Based on the results we provided a new Frequency Statistical method to compartmentalize habitat-suitability in the native range. Finally,we used the model and the compartmentalized criterion developed in native ranges to “project” a potential distribution onto the exotic ranges to build habitat-suitability maps. | CHEN Hao CHEN LiJun Thomas P. ALBRIGHT | 2007 | Chinese Science Bulletin2007，52，9： | 12 |
| 19 | Structure Styles of Mesozoic-Cenozoic U-bearing Rock Series in Northern China显示文摘In Northern China,sandstone-type uranium(U) deposits are mostly developed in MesozoicCenozoic basins. These U deposits are usually hosted in unvarying horizons within the basins and exhibit typical U-forming sedimentary associations,which is referred to as U-bearing rock series. This study describes the structural features of U-bearing rock series within the main Mesozoic-Cenozoic Uproducing continental basins in Kazakhstan,Uzbekistan,and Russia in the western segment of the Central Asian Metallogenic Belt(CAMB),and Northern China in the eastern segment of the CAMB. We analyze the basic structural conditions and sedimentary environments of U-bearing rock series in Northern China and classify their structural styles in typical basins into river valley,basin margin,and intrabasin uplift margin types. The intrabasin uplift margin structural style proposed in this study can be used to indicate directions for the exploration of sandstone-type U deposits hosted in the center of a basin. At the same time,the study of structural style provides a new idea for exploring sandstone-type U deposits in Mesozoic-Cenozoic basins and it is of great significance to prospecting of sandstone-type uranium deposits. | JIN Ruoshi MIAO Peisen SIMA Xianzhang LI Jianguo ZHAO Hualei ZHAO Fengqing FEN Xiaoxi CHEN Yin CHEN Lulu ZHAO Lijun ZHU Qiang | 2016 | Acta Geologica Sinica(English Edition)2016，90，6： | 12 |
| 20 | Remote sensing-based artificial surface cover classification in Asia and spatial pattern analysis显示文摘Artificial surfaces, characterized with intensive land-use changes and complex landscape structures, are important indicators of human impacts on terrestrial ecosystems. Without high-resolution land-cover data at continental scale, it is hard to evaluate the impacts of urbanization on regional climate, ecosystem processes and global environment. This study constructed a hierarchical classification system for artificial surfaces, promoted a remote sensing method to retrieve subpixel components of artificial surfaces from 30-m resolution satellite imageries(Globe Land30) and developed a series of data products of high-precision urban built-up areas including impervious surface and vegetation cover in Asia in 2010. Our assessment, based on multisource data and expert knowledge, showed that the overall accuracy of classification was 90.79%. The mean relative error for the impervious surface components of cities was 0.87. The local error of the extracted information was closely related to the heterogeneity of urban buildings and vegetation in different climate zones. According to our results, the urban built-up area was 18.18×104 km2, accounting for 0.59% of the total land surface areas in Asia; urban impervious surfaces were 11.65×104 km2, accounting for 64.09% of the total urban built-up area in Asia. Vegetation and bare soils accounted for 34.56% of the urban built-up areas. There were three gradients: a concentrated distribution, a scattered distribution and an indeterminate distribution from east to west in terms of spatial pattern of urban impervious surfaces. China, India and Japan ranked as the top three countries with the largest impervious surface areas, which respectively accounted for 32.77%, 16.10% and 11.93% of the urban impervious surface area of Asia. We found the proportions of impervious surface and vegetation cover within urban built-up areas were closely related to the economic development degree of the country and regional climate environment. Built-up areas in developed countries had relatively low impervious surface and high public green vegetation cover, with 50–60% urban impervious surfaces in Japan, South Korea and Singapore. In comparison, the proportion of urban impervious surfaces in developing countries is approaching or exceeding 80% in Asia. In general, the composition and spatial patterns of built-up areas reflected population aggregation and economic development level as well as their impacts on the health of the environment in the sub-watershed. | KUANG WenHui CHEN LiJun LIU JiYuan XIANG WeiNing CHI WenFeng LU DengSheng YANG TianRong PAN Tao LIU AiLin | 2016 | Science China Earth Sciences2016，59，9： | 12 |
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