Toyamara Da Vera Cruz is all ears when Peng Yansen, her teacher, glves instructions. Although she has extensive experience in farming herself. coming from a long line of livestock breeders, Cruz is now learning a new ...Toyamara Da Vera Cruz is all ears when Peng Yansen, her teacher, glves instructions. Although she has extensive experience in farming herself. coming from a long line of livestock breeders, Cruz is now learning a new skill from Peng.展开更多
As the only alkaline gas in the atmosphere,ammonia could react with sulfur dioxide and nitrogen oxides to form the secondary particles.A large amount of NH3 in the atmosphere accelerates the rate of formation of fine ...As the only alkaline gas in the atmosphere,ammonia could react with sulfur dioxide and nitrogen oxides to form the secondary particles.A large amount of NH3 in the atmosphere accelerates the rate of formation of fine particles;it therefore plays an important role in haze pollution.Livestock and poultry farming and nitrogen fertilizer application are the two main NH3 emission sources.Jiangsu Province contributes the largest proportion of NH3 emissions from agriculture in key areas of national air pollution control in China.The aims of this study are to investigate NH3 emissions from agriculture in Jiangsu Province using the emissions factor method,and analyze and summarize the characteristics and trends of NH3 emissions from 2000 to 2017.Results show that the NH3 emissions from agriculture in Jiangsu Province from 2000 to 2017 were mainly contributed by livestock and poultry farming(78.08%)and nitrogen fertilizer application(21.92%).Furthermore,a general fluctuation trend of an initial decrease and then an increase,of NH3 emissions from agriculture,could be found from 2000 to 2012,with minimum NH3 emissions in 2007(708.76 kt yr−1)and maximum emissions in 2012(837.64 kt yr−1);and then a decreasing trend was apparent from 2012(837.64 kt yr−1)to 2017(690.64 kt yr−1).A detailed estimation of the interannual trends and potential measures are also proposed.This study provides a solid theoretical foundation for the development of NH3 emissions control in Jiangsu Province.展开更多
Titanium ascorbate(Ti-AsA),that was used in agriculture,livestock farming and fishery,showed good results ofincreasing production.Author studied mutability ofTi-AsA with vitro toxicological method for the
Rare Earth compounds that was applied in agriculture,livestock farming and fishery showed good results ofincreasing yield or improving its quality and reducingits illness.In this paper,primary research of theantimutag...Rare Earth compounds that was applied in agriculture,livestock farming and fishery showed good results ofincreasing yield or improving its quality and reducingits illness.In this paper,primary research of theantimutagenicity of the organic Rare Earth compounds wasgoing to enlarge new used fields,Result展开更多
Path planning for field agricultural robots must satisfy several criteria:establishing feeding routes,maintaining gentle slopes,approaching multiple livestock observation points,ensuring timely environmental monitorin...Path planning for field agricultural robots must satisfy several criteria:establishing feeding routes,maintaining gentle slopes,approaching multiple livestock observation points,ensuring timely environmental monitoring,and achieving high efficiency.The complex terrain of outdoor farming areas poses a challenge.Traditional A*algorithms,which generate only the shortest path,fail to meet these requirements and often produce paths that lack smoothness.Therefore,identifying the most suitable path,rather than merely the shortest one,is essential.This study introduced a path-planning algorithm tailored to field-based livestock farming environments,building upon the traditional A*algorithm.It constructed a digital elevation model,integrated an artificial potential field for evaluating multiple target points,calculated terrain slope,optimized the search neighborhood based on robot traversability,and employed Bézier curve segmentation for path optimization.This method segmented the path into multiple curves by evaluating the slopes of the lines connecting adjacent nodes,ensuring a smoother and more efficient route.The experimental results demonstrate its superiority to traditional A^(*),ensuring paths near multiple target points,significantly reducing the search space,and resulting in over 69.4%faster search speeds.Bézier curve segmentation delivers smoother paths conforming to robot trajectories.展开更多
文摘Toyamara Da Vera Cruz is all ears when Peng Yansen, her teacher, glves instructions. Although she has extensive experience in farming herself. coming from a long line of livestock breeders, Cruz is now learning a new skill from Peng.
基金This study was funded by the National Natural Science Foundation of China[grant numbers 41771291 and 21806080]the Jiangsu Specially-Appointed Professor Program,the Six Talent Peaks Project in Jiangsu Province[grant number NY-083]the Startup Foundation for Introducing Talent of NUIST,and the Innovation and Entrepreneurship Training Program for College Students in Jiangsu Province.
文摘As the only alkaline gas in the atmosphere,ammonia could react with sulfur dioxide and nitrogen oxides to form the secondary particles.A large amount of NH3 in the atmosphere accelerates the rate of formation of fine particles;it therefore plays an important role in haze pollution.Livestock and poultry farming and nitrogen fertilizer application are the two main NH3 emission sources.Jiangsu Province contributes the largest proportion of NH3 emissions from agriculture in key areas of national air pollution control in China.The aims of this study are to investigate NH3 emissions from agriculture in Jiangsu Province using the emissions factor method,and analyze and summarize the characteristics and trends of NH3 emissions from 2000 to 2017.Results show that the NH3 emissions from agriculture in Jiangsu Province from 2000 to 2017 were mainly contributed by livestock and poultry farming(78.08%)and nitrogen fertilizer application(21.92%).Furthermore,a general fluctuation trend of an initial decrease and then an increase,of NH3 emissions from agriculture,could be found from 2000 to 2012,with minimum NH3 emissions in 2007(708.76 kt yr−1)and maximum emissions in 2012(837.64 kt yr−1);and then a decreasing trend was apparent from 2012(837.64 kt yr−1)to 2017(690.64 kt yr−1).A detailed estimation of the interannual trends and potential measures are also proposed.This study provides a solid theoretical foundation for the development of NH3 emissions control in Jiangsu Province.
文摘Titanium ascorbate(Ti-AsA),that was used in agriculture,livestock farming and fishery,showed good results ofincreasing production.Author studied mutability ofTi-AsA with vitro toxicological method for the
文摘Rare Earth compounds that was applied in agriculture,livestock farming and fishery showed good results ofincreasing yield or improving its quality and reducingits illness.In this paper,primary research of theantimutagenicity of the organic Rare Earth compounds wasgoing to enlarge new used fields,Result
基金supported by Korea Institute of Planning and Evaluation for Technology in Food,Agriculture,Forestry and Fisheries(IPET)through Development of Integrated Crop-Livestock Models for National and Regional Levels Programfunded by Ministry of Agriculture,Food and Rural Affairs(MAFRA)(421046-03)。
基金supported by the Subject construction projects in specific universities(Grant No.2023B10564003)the Science and Technology Rural Commissioner Project of Guangzhou(Grant No.20212100026).
文摘Path planning for field agricultural robots must satisfy several criteria:establishing feeding routes,maintaining gentle slopes,approaching multiple livestock observation points,ensuring timely environmental monitoring,and achieving high efficiency.The complex terrain of outdoor farming areas poses a challenge.Traditional A*algorithms,which generate only the shortest path,fail to meet these requirements and often produce paths that lack smoothness.Therefore,identifying the most suitable path,rather than merely the shortest one,is essential.This study introduced a path-planning algorithm tailored to field-based livestock farming environments,building upon the traditional A*algorithm.It constructed a digital elevation model,integrated an artificial potential field for evaluating multiple target points,calculated terrain slope,optimized the search neighborhood based on robot traversability,and employed Bézier curve segmentation for path optimization.This method segmented the path into multiple curves by evaluating the slopes of the lines connecting adjacent nodes,ensuring a smoother and more efficient route.The experimental results demonstrate its superiority to traditional A^(*),ensuring paths near multiple target points,significantly reducing the search space,and resulting in over 69.4%faster search speeds.Bézier curve segmentation delivers smoother paths conforming to robot trajectories.
