搜索结果: 31-45 共查到“知识库 农业经济学”相关记录1653条 . 查询时间(2.006 秒)
共生：生物进化和多样性之谜
共生 生物进化 多样性之谜
2019/11/18
2018年7月15日至20日，国际共生大会在美国俄勒冈州立大学开启了第9届会议的议程，来自全世界20个国家的400多名生物学家一同探讨“共生”这个涉及人类社会的重要议题。进入21世纪以来，人们已认识到生物共生的普遍性、多样性和重要性——进入炎夏，百花盛开，争奇斗艳；花丛中，蜂忙蝶舞；树冠上，喜鹊们在聚会，蚂蚁和蚜虫也在亲密合作而忙碌着……地下土壤中，那些默默无闻的“地下工作者”正在辛勤的进行着神秘...
LAND USE, MICROCLIMATE, AND SURFACE RUNOFF LINKAGES: SPACE-TIME MODELING FROM ROKEL-SELI RIVER BASIN, SIERRA LEONE
Land use change microclimate surface hydrology open source geospatial Sierra Leone
2018/11/8
This study mainly utilized the Soil and Water Assessment Tool (SWAT) together with SWAT-CUP, both free and open source software (FOSS), to construct a distributed hydrologic flow model for the Rokel-S...
DEVELOPING A LAND COVER CLASSIFICATION OF SALT MARSHES USING UAS TIME-SERIES IMAGERY AND AN OPEN SOURCE WORKFLOW
UAS QGIS OpenDroneMap Salt Marsh RGB Supervised Classification Plug-in
2018/11/8
Salt marsh ecology classification is difficult using traditional coarse resolution remote sensing techniques. Salt marshes exhibit a spatial pattern of vegetation zonation that are visually identifiab...
CAPACITY BUILDING FOR HIGH-RESOLUTION LAND COVER INTERCOMPARISON AND VALIDATION: WHAT IS AVAILABLE AND WHAT IS NEEDED
Capacity Building High-resolution ntercomparison Land Cover Open Source Training Material Validation
2018/11/8
Land Cover (LC) maps are fundamental products for a wide variety of applications. The workflow for their production is composed of classification of satellite imagery and validation against a referenc...
充分了解植被群落时空格局分布特征是开展生态环境恢复工作的前提。选择祁连山中段寺大隆林场为研究区，对1976、1991、2001、2016年的LANDSAT影像进行地物分类，并利用3种景观指数对植被群落生境破碎化程度进行分析，同时运用CA-Markov模型对植被2031年的分布情况作出预测。结果表明：人为因素是导致植被群落变化的主要原因；1976—2016年，祁连山中段寺大隆林场植被群落的分布面积发...
SPATIO-TEMPORAL CHANGE OF VEGETATION COVERAGE AND ITS DRIVING FORCES BASED ON LANDSAT IMAGES: A CASE STUDY OF CHANGCHUN CITY
Vegetation Coverage NDVI Spatio-Temporal Variations Remote Sensing Changchun
2018/5/11
Based on the Landsat images in 2006, 2011 and 2015, and the method of dimidiate pixel model, the Normalized Difference Vegetation Index (NDVI) and the vegetation coverage, this paper analyzes the spat...
LAND COVER CHANGE MONITORING OF TYPICAL FUNCTIONAL COMMUNITIES OF SICHUAN PROVINCE BASED ON ZY-3 DATA
Land Cover ZY-3 Functional Communities Sichuan Province
2018/5/14
According to the function, land space types are divided into key development areas, restricted development areas and forbidden development areas in Sichuan Province. This paper monitors and analyses t...
QUALITY EVALUATION OF LAND-COVER CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK
Remote Sensing Land Cover classification Deep Learning Convolutional Neural Network Quality evaluation
2018/5/11
Land-cover classification is one of the most important products of earth observation, which focuses mainly on profiling the physical characters of the land surface with temporal and distribution attri...
THE REAL-TIME MONITORING SERVICE PLATFORM FOR LAND SUPERVISION BASED ON CLOUD INTEGRATION
Land Supervision Remote Sensing Cloud Integration Real-time Monitoring Service Platform
2018/5/15
Remote sensing monitoring has become the important means for land and resources departments to strengthen supervision. Aiming at the problems of low monitoring frequency and poor data currency in curr...
ACCURACY ASSESSMENT OF THE GLOBELAND30 DATASET IN JIANGXI PROVINCE
land cover GlobeLand30 accuracy assessment confusion matrix consistency analysis Jiangxi Province
2018/5/15
The Globeland30 dataset is the most highly spatial resolution global land cover mapping product, which developed by the National Geomatics Center of China (NGCC) in 2015. It plays a significant role i...
A FREE AND OPEN SOURCE TOOL TO ASSESS THE ACCURACY OF LAND COVER MAPS: IMPLEMENTATION AND APPLICATION TO LOMBARDY REGION (ITALY)
Global Land Cover Accuracy Assessment Free and Open Source Error Matrix Accuracy Measures
2018/5/11
The availability of thematic maps has significantly increased over the last few years. Validation of these maps is a key factor in assessing their suitability for different applications. The evaluatio...
THE FEASIBILITY EVALUATION OF LAND USE CHANGE DETECTION USING GAOFEN-3 DATA
GaoFen-3 Change Detection Land Use Polarimetric SAR High-resolution Quality Evaluation
2018/5/14
GaoFen-3 (GF-3) satellite, is the first C band and multi-polarimetric Synthetic Aperture Radar (SAR) satellite in China. In order to explore the feasibility of GF-3 satellite in remote sensing interpr...
STUDY ON CLASSIFICATION ACCURACY INSPECTION OF LAND COVER DATA AIDED BY AUTOMATIC IMAGE CHANGE DETECTION TECHNOLOGY
National Geographic Conditions Monitoring Land Cover Data Quality Inspection Classification Accuracy Change Detection
2018/5/16
The purpose of carrying out national geographic conditions monitoring is to obtain information of surface changes caused by human social and economic activities, so that the geographic information can...
LAND ADMINISTRATION SUPPORT FOR POST-DISASTER MANAGEMENT
fire hazard land administration monitoring fire management system compensations
2018/5/8
In the Republic of Croatia, especially during the summer times, fire hazards represent a real threat for vegetation and animals but also for material goods and human lives. The most affected areas are...