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| 1 | Stable classi?cation with limited sample: transferring a 30-m resolution sample set collected in 2015 to mapping 10-m resolution global land cover in 2017显示文摘As the world strives to reduce the impact of population growth, urbanization, agricultural expansion, and climate change on food security, energy and water shortage, resource over-exploration, biodiversity loss, environmental pollution, and ultimately human health, timely and higher resolution land cover information is urgently needed to achieve the sustainable development goals of the United Nations. | Peng Gong Han Liu Meinan Zhang Congcong Li Jie Wang Huabing Huang Nicholas Clinton Luyan Ji Wenyu Li Yuqi Bai Bin Chen Bing Xu Zhiliang Zhu Cui Yuan Hoi Ping Suen Jing Guo Nan Xu Weijia Li Yuanyuan Zhao Jun Yang Chaoqing Yu Xi Wang Haohuan Fu Le Yu Iryna Dronova Fengming Hui Xiao Cheng Xueli Shi Fengjin Xiao Qiufeng Liu Lianchun Song | 2019 | Science Bulletin2019，64，6： | 166 |
| 2 | Changing patterns of urban-rural nutrient flows in China:driving forces and options显示文摘Nutrient recycling has been practiced for thousands of years in China to maintain food production without environmental pollution. In the past three decades, however, the traditional nutrient recycling systems have been replaced with waste treatment systems, which have resulted in rapid and severe environmental pollution. By analyzing the primary driving forces of the changing nutrient flows(technology, labor costs, food supplies, fertilizer demands, environmental quality, human health, and public awareness), this paper argues that technology fundamentally motivated the nutrient-recycling strategy to address the malnutrition problem in traditional societies but has constrained the reconstruction of nutrient recycling systems in modern cities. With the availability of synthetic fertilizers in modern society, the lack of interdisciplinary views in policy making for nutrient management is the root cause of today's environmental situation. Ongoing fast urbanization has concentrated more nutrients in urban areas, creating the need for a national nutrient management plan to coordinate multiple ministries and fix the uncoupled nutrient cycling between urban and rural systems. Rebuilding the traditional nutrient-recycling systems is an environmentally and economically effective solution. There are three fundamental technological barriers to reconstructing the nutrient recycling systems, as follows: userfriendly toilets, the separation of sewage pipelines, and easy-to-use organic fertilizers made from human manure or other organic waste. Overcoming these barriers requires building institutional mechanisms,developing the necessary infrastructure, creating research funding, and providing open experimental platforms for technological development. | Chaoqing Yu Yuchen Xiao Shaoqiang Ni | 2017 | Science Bulletin2017，62，2： | 5 |
| 3 | Dynamic Event-triggered State Estimation for Nonlinear Coupled Output Complex Networks Subject to Innovation Constraints显示文摘Dear editor,This letter investigates the recursive state estimation(RSE)problem for a class of coupled output complex networks via the dynamic event-triggered communication mechanism(DETCM)and innovation constraints(ICs).Firstly,a DETCM is employed to regulate the transmission sequences.Then,in order to improve the reliability of network communication,a saturation function is introduced to constrain the measurement outliers.A new RSE method is provided such that,for all output coupling,DETCM and ICs,an upper bound of state estimation error covariance(SEEC)is presented in a recursive form,whose trace can be minimized via parameterizing the state estimator gain matrix(SEGM).Moreover,the theoretical analysis is given to guarantee that the error dynamic is uniformly bounded.Finally,a simulation example is illustrated to show the effectiveness of the proposed RSE method. | Jun Hu Chaoqing Jia Hui Yu Hongjian Liu | 2022 | IEEE/CAA Journal of Automatica Sinica2022，9，5： | 1 |
| 4 | Using a global reference sample set and a cropland map for area estimation in China显示文摘A technically transparent and freely available reference sample set for validation of global land cover mapping was recently established to assess the accuracies of land cover maps with multiple resolutions.This sample set can be used to estimate areas because of its equal-area hexagon-based sampling design.The capabilities of these sample set-based area estimates for cropland were investigated in this paper.A 30-m cropland map for China was consolidated using three thematic maps(cropland,forest and wetland maps)to reduce confusion between cropland and forest/wetland.We compared three area estimation methods using the sample set and the 30 m cropland map.The methods investigated were:(1)pixel counting from a complete coverage map,(2)direct estimation from reference samples,and(3)model-assisted estimation combining the map with samples.Our results indicated that all three methods produced generally consistent estimates which agreed with cropland area measured from an independent national land use dataset.Areas estimated from the reference sample set were less biased by comparing with a National Land Use Dataset of China(NLUD-C).This study indicates that the reference sample set can be used as an alternative source to estimate areas over large regions. | YULe LI XueCao LI CongCong ZHAO YuanYuan NIU ZhenGuo HUANG HuaBing WANG Jie CHENG YuQi LU Hui SI YaLi YU ChaoQing FU HaoHuan GONG Peng | 2017 | Science China Earth Sciences2017，60，2： | 1 |
| 5 | Extensions to least-cost path algorithms for roadway planning 显示文摘 | YU Chaoqing LEE J MUNRO-STASIUK M J | 2003 | International Journal of Geographical Information Science2003，17，4： | 1 |
| 6 | Synthesis of conducting poly- aniline/TiO2 composite nano? bres by one-step in situ polymer ization method显示文摘 | Bian Chaoqing Yu Yijun Xue Gi | 2006 | Journal of Applied Polymer Science2006，，： | 1 |
| 7 | TiO2 nanotube array film prepared by anodization as anode material for lithium ion batteries显示文摘 | Zhen Wei Zheng Liu Rongrong Jiang Chaoqing Bian Tao Huang Aishui Yu | | Journal of Solid State Electrochemistry0，，： | 1 |
| 8 | TiO2 nanotube array film prepared by anodization as anode material for lithium ion batteries显示文摘 | Zhen Wei Zheng Liu Rongrong Jiang Chaoqing Bian Tao Huang Aishui Yu | 2010 | Journal of Solid State Electrochemistry2010，，6： | 1 |
| 9 | Research Article: Extensions to least-cost path algorithms for roadway planning显示文摘 | Chaoqing Yu Jay Lee Mandy J. Munro-Stasiuk | 2003 | International Journal of Geographical Information Science2003，，4： | 1 |
| 10 | Deep Learning for Seasonal Precipitation Prediction over China显示文摘Despite significant progress having been made in recent years,the forecast skill for seasonal precipitation over China remains limited.In this study,a deep-learning-based statistical prediction model for seasonal precipitation over China was developed.The model was trained to learn the distribution of the seasonal precipitation using simultaneous general circulation data.First,it was pre-trained with the hindcasts of several general circulation models(GCMs),and evaluation of the test set suggested that the pre-trained model could basically reproduce the GCM-predicted precipitation,with the anomaly pattern correlation coefficients(PCCs)greater than 0.80.Then,transfer learning was applied by using ECMWF Reanalysis v5(ERA5)data and gridded precipitation observational data over China,to further correct the systemic errors in the model.As a result,using general circulation fields from reanalysis as the input,this hybrid model performed reasonably well in simulating the seasonal precipitation over China,with the PCC reaching 0.71.In addition,the results using the circulation fields predicted by GCMs as the input were also assessed.In general,the proposed model improves the PCC over China by 0.10-0.13,as compared to the raw GCM outputs,for lead times of 1-4 months.This deep learning model has been used at the National Climate Center of China Meteorological Administration for the past two years to provide guidance for summer precipitation prediction over China and has performed extremely well. | Weixin JIN Yong LUO Tongwen WU Xiaomeng HUANG Wei XUE Chaoqing YU | 2022 | Journal of Meteorological Research2022，36，2： | 0 |
| 11 | A comparative review of the state and advancement of Site-Specific Crop Management in the UK and China显示文摘Precision agriculture, and more specifically Site-Specific Crop Management(SSCM), has been implemented in some form across nearly all agricultural production systems over the past 25 years. Adoption has been greatest in developed agricultural countries. In this review article, the current situation of SSCM adoption and application is investigated from the perspective of a developed(UK) and developing(China) agricultural economy. The current state-of-the art is reviewed with an emphasis on developments in position system technology and satellite-based remote sensing. This is augmented with observations on the differences between the use of SSCM technologies and methodologies in the UK and China and discussion of the opportunities for(and limitations to)increasing SSCM adoption in developing agricultural economies. A particular emphasis is given to the role of socio-demographic factors and the application of responsible research and innovation(RRI) in translating agritechnologies into China and other developing agricultural economies. Several key research and development areas are identified that need to be addressed to facilitate the delivery of SSCM as a holistic service into areas with low precision agriculture(PA) adoption. This has implications for developed as well as developing agricultural economies. | Zhenhong LI James TAYLOR Lynn FREWER Chunjiang ZHAO Guijun YANG Zhenhai LI Zhigang LIU Rachel GAULTON Daniel WICKS Hugh MORTIMER Xiao CHENG Chaoqing YU Zhanyi SUN | 2019 | Frontiers of Agricultural Science and Engineering2019，6，2： | 0 |
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