Agricultural monitoring is essential for adequate management of food production and distribution.Crop land and crop type classification,using remote sensing time series,form an important tool to capture the agricultur...Agricultural monitoring is essential for adequate management of food production and distribution.Crop land and crop type classification,using remote sensing time series,form an important tool to capture the agricultural production information.The recently launched Sentinel-2 satellites provide unprecedented monitoring capacities in terms of spatial resolution,swath width,and revisit frequency.The Sentinel-2 for Agriculture(Sen2-Agri)system has been developed to fully exploit those capacities,by providing four relevant earth observation products for agricultural monitoring.Under the Dragon 4 Program,the crop mapping with various satellite images and a specific focus on the Yellow River irrigated agricultural area in the Ningxia Hui Autonomous Region in China was carried out with the Sentinel-2 for Agriculture system(Sent2Agri).9 types of crops were classified and the crop type map in 2017 was produced based on 35 scenes Sentinel 2A/B images.The overall accuracy computed from the error confusion matrix is 88%,which includes the cropped and uncropped types.After the removal of the uncropped area,the overall accuracy for a cropped decrease to 73%.In order to further improve the crop classification accuracy,the training dataset should be further improved and tuned.展开更多
When Uganda sent its troops to Somalia to keep peace in the war-torn country in East Africa in March 2007,many locals considered the move would backfire miserably. But the Ugandan armed forces proved their critics wro...When Uganda sent its troops to Somalia to keep peace in the war-torn country in East Africa in March 2007,many locals considered the move would backfire miserably. But the Ugandan armed forces proved their critics wrong and showed their mettie,going on to successfully execute peacekeeping missions not only in Somalia,but also in other countries in the region.展开更多
Ⅰ.Analysis of the teaching material内容分析This is the first class in Section A of Unit11.The language goal is to practice telling one’s preferences or opinions about events.This is a topic that students will be ver...Ⅰ.Analysis of the teaching material内容分析This is the first class in Section A of Unit11.The language goal is to practice telling one’s preferences or opinions about events.This is a topic that students will be very interested in.In this unit,students will learn some names of different kinds of TV shows and movies,the related popular culture and the way of showing opinions.What do you think of...?It is a question used to ask for others’opinions in Section A.展开更多
At 15:06 on May 10, China successfully sent Yaogan 14 satellite and Tiantuo 1 satellite into space with a Long March 4B rocket from the Taiyuan Satellite Launch Center. It marks another launch of two satellites by one...At 15:06 on May 10, China successfully sent Yaogan 14 satellite and Tiantuo 1 satellite into space with a Long March 4B rocket from the Taiyuan Satellite Launch Center. It marks another launch of two satellites by one rocket following the launch of two BeiDou (Compass) satellites by one rocket on April 30, and it is also the third consecutive launch mission conducted by CASC within 10 days.展开更多
Kenya, Zimbabwe and South Africa bomb at 2011 Cricket World Cup THE 2011 Cricket World Cup came to a rapturous end in April with India claiming the sport’s top prize. Africa’s participation in the tournament had lon...Kenya, Zimbabwe and South Africa bomb at 2011 Cricket World Cup THE 2011 Cricket World Cup came to a rapturous end in April with India claiming the sport’s top prize. Africa’s participation in the tournament had long been dead in展开更多
基金Natural Science Foundation project(No.41271429)FP7 Project(SIGMA)ESA Project(Dragon 4 and S2A)。
文摘Agricultural monitoring is essential for adequate management of food production and distribution.Crop land and crop type classification,using remote sensing time series,form an important tool to capture the agricultural production information.The recently launched Sentinel-2 satellites provide unprecedented monitoring capacities in terms of spatial resolution,swath width,and revisit frequency.The Sentinel-2 for Agriculture(Sen2-Agri)system has been developed to fully exploit those capacities,by providing four relevant earth observation products for agricultural monitoring.Under the Dragon 4 Program,the crop mapping with various satellite images and a specific focus on the Yellow River irrigated agricultural area in the Ningxia Hui Autonomous Region in China was carried out with the Sentinel-2 for Agriculture system(Sent2Agri).9 types of crops were classified and the crop type map in 2017 was produced based on 35 scenes Sentinel 2A/B images.The overall accuracy computed from the error confusion matrix is 88%,which includes the cropped and uncropped types.After the removal of the uncropped area,the overall accuracy for a cropped decrease to 73%.In order to further improve the crop classification accuracy,the training dataset should be further improved and tuned.
文摘When Uganda sent its troops to Somalia to keep peace in the war-torn country in East Africa in March 2007,many locals considered the move would backfire miserably. But the Ugandan armed forces proved their critics wrong and showed their mettie,going on to successfully execute peacekeeping missions not only in Somalia,but also in other countries in the region.
文摘Ⅰ.Analysis of the teaching material内容分析This is the first class in Section A of Unit11.The language goal is to practice telling one’s preferences or opinions about events.This is a topic that students will be very interested in.In this unit,students will learn some names of different kinds of TV shows and movies,the related popular culture and the way of showing opinions.What do you think of...?It is a question used to ask for others’opinions in Section A.
文摘At 15:06 on May 10, China successfully sent Yaogan 14 satellite and Tiantuo 1 satellite into space with a Long March 4B rocket from the Taiyuan Satellite Launch Center. It marks another launch of two satellites by one rocket following the launch of two BeiDou (Compass) satellites by one rocket on April 30, and it is also the third consecutive launch mission conducted by CASC within 10 days.
文摘Kenya, Zimbabwe and South Africa bomb at 2011 Cricket World Cup THE 2011 Cricket World Cup came to a rapturous end in April with India claiming the sport’s top prize. Africa’s participation in the tournament had long been dead in
