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浏览/检索结果: 共513条，第1-10条 帮助 限定条件 专题：北京大学    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 An Improved Estimation of Regional Fractional Woody/Herbaceous Cover Using Combined Satellite Data and High-Quality Training Samples 期刊论文 REMOTE SENSING, 2017 Liu, Xu; Liu, Hongyan; Qiu, Shuang; Wu, Xiuchen; Tian, Yuhong; Hao, Qian 收藏  |  浏览/下载：8/0  |  提交时间：2017/12/03 vegetation fractional cover  semi-arid area  MODIS  satellite data integration  spatial sampling design  image classification  Random Forest regression  model performance evaluation  LAND-COVER  INNER-MONGOLIA  MODIS DATA  VEGETATION  SURFACE  STEPPE  FOREST  COEXISTENCE  TOPOGRAPHY  TRANSITION   Increasing the Use of Urban Greenways in Developing Countries: A Case Study on Wutong Greenway in Shenzhen, China 期刊论文 INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, 2017 Chen, Yiyong; Gu, Weiying; Liu, Tao; Yuan, Lei; Zeng, Mali 收藏  |  浏览/下载：4/0  |  提交时间：2017/12/03 frequency of use  duration of use  logistic regression  urban greenway  PHYSICAL-ACTIVITY BEHAVIORS  PUBLIC OPEN SPACE  HEALTH  INFRASTRUCTURE  COMMUNITIES  DESIGN  PLACE   Effects of phosphorus stress on the photosynthetic and physiological characteristics of Chlorella vulgaris based on chlorophyll fluorescence and flow cytometric analysis 期刊论文 ECOLOGICAL INDICATORS, 2017 Jiao, Yang; Ouyang, Hui-Ling; Jiang, Yu-Jiao; Kong, Xiang-Zhen; He, Wei; Liu, Wen-Xiu; Yang, Bin; Xu, Fu-Liu 收藏  |  浏览/下载：124/0  |  提交时间：2017/12/03 Cellular physiology  Chlorella vulgaris  Chlorophyll fluorescence  FCM  growth  Photosynthesis  Phosphorus  ORGANIC PHOSPHORUS  K-SELECTION  R-SELECTION  INHIBITION  MICROALGAE  COPPER  EVOLUTION  TOXICITY  GROWTH  ALGAE   Tree-ring-based SPEI reconstruction in central Tianshan Mountains of China since AD 1820 and links to westerly circulation 期刊论文 INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2017 Jiang, Peng; Liu, Hongyan; Wu, Xiuchen; Wang, Hongya 收藏  |  浏览/下载：11/0  |  提交时间：2017/12/03 SPEI  tree-ring width  Tianshan Mountains  DROUGHT SEVERITY INDEX  MOISTURE VARIABILITY  NORTH-ATLANTIC  CLIMATE-CHANGE  TIME-SERIES  VEGETATION  IMPACTS  HISTORY  DATASET  SHAN   Optimized Multiresidue Analysis of Organic Contaminants of Priority Concern in a Daily Consumed Fish (Grass Carp) 期刊论文 JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY, 2017 He, Wei; Chen, Yanru; Yang, Chen; Liu, Wenxiu; Kong, Xiangzhen; Qin, Ning; He, Qishuang; Xu, Fuliu 收藏  |  浏览/下载：5/0  |  提交时间：2017/12/03 POLYCYCLIC AROMATIC-HYDROCARBONS  POLYBROMINATED DIPHENYL ETHERS  ACCELERATED SOLVENT-EXTRACTION  GEL-PERMEATION CHROMATOGRAPHY  ORGANOCHLORINE PESTICIDE-RESIDUES  POLYCHLORINATED-BIPHENYLS PCBS  PRESSURIZED LIQUID EXTRACTION  MICROWAVE-ASSISTED EXTRACTION  BIOLOGICAL MATRICES  SUPERCRITICAL-FLUID   Long-term forest resilience to climate change indicated by mortality, regeneration, and growth in semiarid southern Siberia 期刊论文 GLOBAL CHANGE BIOLOGY, 2017 Xu, Chongyang; Liu, Hongyan; Anenkhonov, Oleg A.; Korolyuk, Andrey Yu; Sandanov, Denis V.; Balsanova, Larisa D.; Naidanov, Bulat B.; Wu, Xiuchen 收藏  |  浏览/下载：8/0  |  提交时间：2017/12/03 arid timberline  arid tree line  climate change  forest resilience  forest-steppe  patch size  southern Siberia  ECOLOGICAL RESILIENCE  TEMPERATE FOREST  WESTERN CANADA  SEED BANK  DROUGHT  DYNAMICS  VARIABILITY  DISTURBANCE  MOUNTAINS  TREELINE   How to reduce household carbon emissions: A review of experience and policy design considerations 期刊论文 ENERGY POLICY, 2017 Zhang, Xiaoling; Wang, Yue 收藏  |  浏览/下载：18/0  |  提交时间：2017/12/03 Energy policy  Household carbon emission  Demand-supply  CO2 EMISSIONS  RENEWABLE ELECTRICITY  DECOMPOSITION ANALYSIS  ENERGY-CONSUMPTION  UNITED-KINGDOM  GHG EMISSIONS  CHINA  IMPACT  SECTOR  URBAN   Management outweighs climate change on affecting length of rice growing period for early rice and single rice in China during 1991-2012 期刊论文 AGRICULTURAL AND FOREST METEOROLOGY, 2017 Wang, Xuhui; Ciais, Philippe; Li, Laurent; Ruget, Francois; Vuichard, Nicolas; Viovy, Nicolas; Zhou, Feng; Chang, Jinfeng; Wu, Xiuchen; Zhao, Hongfang; Piao, Shilong 收藏  |  浏览/下载：47/0  |  提交时间：2017/12/03 Length of growing period  Rice  Climate change  Crop management  ORCHIDEE-crop  China  WINTER-WHEAT PHENOLOGY  PAST 3 DECADES  CROP MANAGEMENT  GROWTH DURATION  EXTREME HEAT  FIELD CROPS  YIELD  IMPACTS  MODELS  TEMPERATURE   A novel colorimetric biosensor based on non-aggregated Au@Ag core-shell nanoparticles for methamphetamine and cocaine detection 期刊论文 TALANTA, 2017 Mao, Kang; Yang, Zhugen; Li, Junrong; Zhou, Xiaodong; Li, Xiqing; Hu, Jiming 收藏  |  浏览/下载：105/0  |  提交时间：2017/12/03 Au@Ag  Aptamer  Methamphetamine  Colorimetry  Illicit drugs  TANDEM MASS-SPECTROMETRY  UNMODIFIED GOLD NANOPARTICLES  ILLICIT DRUGS  APTAMER  DNA  PROBES  WATER  OLIGONUCLEOTIDES  PHARMACEUTICALS  APTASENSOR   A New Crown-Group Frog (Amphibia: Anura) from the Early Cretaceous of Northeastern Inner Mongolia, China 期刊论文 AMERICAN MUSEUM NOVITATES, 2017 Gao, Ke-Qin; Chen, Jianye 收藏  |  浏览/下载：2/0  |  提交时间：2017/12/03 PHYLOGENETIC-RELATIONSHIPS  DISCOGLOSSID FROG  SALIENTIA  SPAIN