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
Single-edged notched tension （SENT） specimen is used to study the fatigue crack growth rate （FCGR） behavior of AISI 50100 steel using MTS 810. Calibration tests are run to get plots of crack mouth opening displace...Single-edged notched tension （SENT） specimen is used to study the fatigue crack growth rate （FCGR） behavior of AISI 50100 steel using MTS 810. Calibration tests are run to get plots of crack mouth opening displacement （CMOD） vs. load and CMOD vs. crack length-to-width ratio with the known crack lengths. Numerical simulation is also done to try to establish a relation between crack length and CMOD. FCGR of welded and un-welded specimens are plotted against stress intensity factor range to show the effect of welding on fatigue crack growth rate of AISI 50100 steel. The experimentally obtained CMOD values are compared with values obtained by numerical simulation using ABAQUS/StandardTM software package. Results show that numerical values are in good agreement with experimental data for small crack lengths and lower values of applied load,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
WE ALL HAVE A BIG RESPONSIBILITY: TO DESIGN EXCELLENT FASHION AND CONTRIBUTE TO SAVING OUR EARTH. THE DIALOGUE THAT SPRINGS FROM EVENTS LIKE THE PRESENTATION OF THE TRENDS IS AN IMPORTANT TOOL FOR THE ENTIRE FASHION I...WE ALL HAVE A BIG RESPONSIBILITY: TO DESIGN EXCELLENT FASHION AND CONTRIBUTE TO SAVING OUR EARTH. THE DIALOGUE THAT SPRINGS FROM EVENTS LIKE THE PRESENTATION OF THE TRENDS IS AN IMPORTANT TOOL FOR THE ENTIRE FASHION INDUSTRY On October 25,2017,the route to the 26th edition of Milano展开更多
The Yaogan 13 remote sensing satellite was launched into orbit from the Taiyuan Satellite Launch Center on November 30 on a LM-2C launch vehicle.Developed by SAST,the satellite will be used for scientific experiments,...The Yaogan 13 remote sensing satellite was launched into orbit from the Taiyuan Satellite Launch Center on November 30 on a LM-2C launch vehicle.Developed by SAST,the satellite will be used for scientific experiments,land survey,crop yield assessment and disaster monitoring.展开更多
China successfully launched FY-3D by a LM-4C carrier rocket from the Taiyuan Satellite Launch Center at 02：35 Beijing time on November 15.The mission also carried the HEAD-1experiment satellite which was developed by...China successfully launched FY-3D by a LM-4C carrier rocket from the Taiyuan Satellite Launch Center at 02：35 Beijing time on November 15.The mission also carried the HEAD-1experiment satellite which was developed by SAST.The LM-4C carrier rocket was developed by SAST.22 technological improvements were made for this launch mission to meet the satellite’s requirement and improve the flight reliability.So far,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.
基金supported by University of Engineering and Technology, Taxila
文摘Single-edged notched tension （SENT） specimen is used to study the fatigue crack growth rate （FCGR） behavior of AISI 50100 steel using MTS 810. Calibration tests are run to get plots of crack mouth opening displacement （CMOD） vs. load and CMOD vs. crack length-to-width ratio with the known crack lengths. Numerical simulation is also done to try to establish a relation between crack length and CMOD. FCGR of welded and un-welded specimens are plotted against stress intensity factor range to show the effect of welding on fatigue crack growth rate of AISI 50100 steel. The experimentally obtained CMOD values are compared with values obtained by numerical simulation using ABAQUS/StandardTM software package. Results show that numerical values are in good agreement with experimental data for small crack lengths and lower values of applied load,
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
文摘WE ALL HAVE A BIG RESPONSIBILITY: TO DESIGN EXCELLENT FASHION AND CONTRIBUTE TO SAVING OUR EARTH. THE DIALOGUE THAT SPRINGS FROM EVENTS LIKE THE PRESENTATION OF THE TRENDS IS AN IMPORTANT TOOL FOR THE ENTIRE FASHION INDUSTRY On October 25,2017,the route to the 26th edition of Milano
文摘The Yaogan 13 remote sensing satellite was launched into orbit from the Taiyuan Satellite Launch Center on November 30 on a LM-2C launch vehicle.Developed by SAST,the satellite will be used for scientific experiments,land survey,crop yield assessment and disaster monitoring.
文摘China successfully launched FY-3D by a LM-4C carrier rocket from the Taiyuan Satellite Launch Center at 02：35 Beijing time on November 15.The mission also carried the HEAD-1experiment satellite which was developed by SAST.The LM-4C carrier rocket was developed by SAST.22 technological improvements were made for this launch mission to meet the satellite’s requirement and improve the flight reliability.So far,
