搜索结果: 1-15 共查到“region”相关记录1303条 . 查询时间(0.097 秒)
Developing Additive Systems of Biomass Equations for Robinia pseudoacacia L. in the Region of Loess Plateau of Western Shanxi Province, China
Robinia pseudoacacia L. Loess Plateau additive biomass models error structure likelihood analysis seemingly unrelated regression
2024/1/12
The accurate estimation of forest biomass is important to evaluate the structure and function of forest ecosystems, estimate carbon sinks in forests, and study matter cycle, energy flow, and the effec...
Seasonal Variations in Carbon, Nitrogen, and Phosphorus Stoichiometry of a Robinia pseudoacacia Plantation on the Loess Hilly Region, China
ecological stoichiometry plants-litter-soil seasonal variation plantation Loess Plateau
2024/1/11
Seasonal variations in stoichiometry are a crucial regulatory mechanism for plant communities that respond to environmental changes. However, the seasonal characteristics of stoichiometry in plants, l...
Influence of Abiotic and Biotic Factors on Soil Microbial Biomass in Robinia pseudoacacia Plantations in the Loess Hilly Region
Robinia pseudoacacia driving factors interactive effect forward selection general linear model
2023/12/21
The ecological productivity of the Robinia pseudoacacia L. (RP) widely cultivated on the Loess hilly region has been widely questioned with its aging. Soil microbial biomass (SMB) plays a key role in ...
Assessing Future Changes of Climate Extreme Events in the CORDEX-MENA Region Using Regional Climate Model ALADIN-Climate
Extremes Regional climate change CORDEX MENA Heat waves Drought
2023/12/19
This study investigates future changes of temperature, precipitation, and associated extreme events in the MENA region using Regional Climate Model ALADIN-Climate over the CORDEX-MENA domain. Model ca...
Intraday Variation Mapping of Population Age Structure via Urban-Functional-Region-Based Scaling
age structure urban functional regions temporal scaling factor dasymetric model RF-RFE algorithm intraday variation map
2023/12/6
The spatial distribution of the population is uneven?for various reasons, such as urban-rural differences and geographical conditions differences. As the basic element of the natural structure of the ...
Classifying Individual Shrub Species in UAV Images—A Case Study of the Gobi Region of Northwest China
shrub species classification unmanned aerial vehicle RGB image object-based image analysis spectral indices texture indices
2023/12/5
Shrublands are the main vegetation component in the Gobi region and contribute considerably to its ecosystem. Accurately classifying individual shrub vegetation species to understand their spatial dis...
Vegetation Mapping in the Permafrost Region: A Case Study on the Central Qinghai-Tibet Plateau
vegetation mapping alpine swamp meadow random forest permafrost region Qinghai-Tibet Plateau
2023/12/4
An accurate and detailed vegetation map is of crucial significance for understanding the spatial heterogeneity of subsurfaces, which can help to characterize the thermal state of permafrost. The absen...
A Planted Forest Mapping Method Based on Long-Term Change Trend Features Derived from Dense Landsat Time Series in an Ecological Restoration Region
planted forests long-term change trend features Landsat time series Google Earth Engine random forest NDVI
2023/12/1
Planted forests provide a variety of meaningful ecological functions and services, which is a major approach for ecological restoration, especially in arid areas. However, mapping planted forests with...
Soil Organic Nitrogen Components and N?Cycling Enzyme Activities Following Vegetation Restoration of Cropland in Danxia Degraded Region
reforestation succession forest vegetation pine plantations karst
2023/11/22
This study outlines research performed on experimental plots established in forest plantations and in natural black pine forests. The objective of the study was to determine the habitat factors that h...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Defocusing NLS equation with nonzero background: Painleve asymptotics in transition region
非零背景 散焦NLS方程 过渡区 疼痛渐近
2023/5/5
Consider to the Cauchy problem of the defocusing NLS equation with a nonzero background. With the Dbar steepest descent method and double scaling limit, we obtain Painleve asymptotics in two transitio...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Defocusing NLS equation with nonzero background: Soliton resolution in soliton region
非零背景 散焦NLS方程 孤子区域 孤子分辨率
2023/5/5
Consider to the Cauchy problem of the defocusing NLS equation with a nonzero background. With the Dbar generalization of the nonlinear steepest descent method to compute the leading order approximatio...
Up to 85 per cent of historical salmon habitat lost in Lower Fraser region
salmon habitat salmon production habitat protection
2021/8/6
For perhaps the first time ever, researchers have mapped out the true extent of habitat loss for salmon in the Lower Fraser River, one of the most important spawning and rearing grounds for Pacific sa...
Piedmont region drinking wells exceed North Carolina's hexavalent chromium standards（图）
Piedmont region drinking wells North Carolina hexavalent chromium standards
2019/12/2
A new study that combines measurements from some 1,400 drinking water wells across North Carolina estimates that more than half the wells in the state's central region contain levels of cancer-causing...
探讨Reference Region模型（RR模型）和Extended Tofts（ET模型）模型DCE-MRI定量灌注参数鉴别富细胞型子宫肌瘤的价值。 方法 连续收集2015年9月至2016年9月经手术病理证实的子宫肌瘤59例（普通型28例，富细胞型12例，退变型19例）病例资料。所有患者术前均行盆腔DCE-MRI检查，应用RR模型和ET模型分别计算子宫肌瘤的定量灌注参数，用ROC曲线评价其诊断...
DEFORMATION MONITORING IN AND AROUND THE NATIONAL CAPITAL REGION OF INDIA USING DINSAR TECHNIQUE
Sentinel-1 DInSAR Deformation NCR, Vasundra
2019/2/27
Urbanization increases the pressure on land and ground water. Due to pressure on land and over extraction of the ground water for modernization and development, deformation of land increase. The tradi...