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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 | Molecular bases of rice grain size and quality for optimized productivity显示文摘The accomplishment of further optimization of crop productivity in grain yield and quality is a great challenge.Grain size is one of the crucial determinants of rice yield and quality;all of these traits are typical quantitative traits controlled by multiple genes.Research advances have revealed several molecular and developmental pathways that govern these traits of agronomical importance.This review provides a comprehensive summary of these pathways,including those mediated by G-protein,the ubiquitin–proteasome system,mitogen-activated protein kinase,phytohormone,transcriptional regulators,and storage product biosynthesis and accumulation.We also generalize the excellent precedents for rice variety improvement of grain size and quality,which utilize newly developed gene editing and conventional gene pyramiding capabilities.In addition,we discuss the rational and accurate breeding strategies,with the aim of better applying molecular design to breed high-yield and superior-quality varieties. | Deyong Ren Chaoqing Ding Qian Qian | 2023 | Science Bulletin2023，，3： | 5 |
| 3 | 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 |
| 4 | Facile one- pot synthesis of luminescent, water-soluble, and biocompatible glutathione-coated CdTe nanocrystals显示文摘 | QIAN Huifeng DONG Chaoqing WENG Jifang | 2006 | Samll2006，2，6： | 1 |
| 5 | 显示文摘 | Li Xingwei Chen Wei Bian Chaoqing | 2003 | Applied Surface Science2003，217，： | 1 |
| 6 | Research on the energy-saving effect of energy policies in China:1982-2006显示文摘 | Chaoqing Yuan Sifeng Liu Zhigeng Fang Junlong Wu | 2009 | Energy Policy2009，37，7： | 1 |
| 7 | 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 |
| 8 | 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 |
| 9 | 显示文摘 | Qian Huifeng Dong Chaoqing Peng Jinliang | 2007 | Journal of Physical Chemistry C2007，111，16： | 1 |
| 10 | Protective effect of the methanolic extract from Duchesnea indica against oxidative stress in vitro and in vivo显示文摘 | HU Weicheng HAN W HUANG Chaoqing | 2011 | Environmental Toxicology and Pharmacology2011，31，： | 1 |
| 11 | 显示文摘 | Li Xingwei Chen Wei Bian Chaoqing | 2003 | Applied Surface Science2003，217，： | 1 |
| 12 | Fibriform Polyanilifte/nano-Ti02composite as an electrode naterial for aqueous redox supercapacitors显示文摘 | Bian Chaoqing YuAishui Wu Haoqing | 2009 | Electrochem Commun2009，，11： | 1 |
| 13 | Chemical composition, nutritional value, and antioxidant constituents of Kalopanaxpicms leaves显示文摘 | HU Weicheng HUANG Chaoqing WANG M H | 2012 | Food Chemistry2012，131，2： | 1 |
| 14 | The relationship among energy prices and energy consumption in China显示文摘 | Chaoqing Yuan Sifeng Liu Junlong Wu | 2010 | Energy Policy2010，38，1： | 1 |
| 15 | The relation between Chinese economic development and energy consumption in the different periods显示文摘 | CHAOQING YUAN SIFENG LIU ZHIGENG FANG | | 0，，09： | 1 |
| 16 | Angular momentum density of a Gaussian vortex beam显示文摘The Gaussian vortex beam is assumed to be linearly polarized.The analytical expression of the electric field of a linearly polarized Gaussian vortex beam propagating in free space is derived by using the vectorial Rayleigh-Sommerfeld integral formulae.The propagating magnetic field of the linearly polarized Gaussian vortex beam is presented by taking the curl of the electric field.By employing the electromagnetic field of the linearly polarized Gaussian vortex beam beyond the paraxial approximation,the analytical expression of the angular momentum density of the linearly polarized Gaussian vortex beam is derived.The three components of the angular momentum density of a linearly polarized Gaussian vortex beam are demonstrated in the reference plane.The effects of the linearly polarized angle and the topological charge on the three components of the angular momentum density are investigated.To acquire the more longitudinal angular momentum density requires such an optimal choice that the linearly polarized angle is set to be zero and the topological charge increases.This research is useful to the optical trapping,the optical guiding,and the optical manipulation. | ZHOU GuoQuan WANG XiaoGang DAI ChaoQing CHU XiuXiang | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，4： | 1 |
| 17 | The relation between Chinese economic development and energy consumption in the different periods显示文摘 | Chaoqing Yuan Sifeng Liu Zhigeng Fang Naiming Xie | | 0，，38： | 1 |
| 18 | Variable-coefficient F-expansion Method and its Application to Nonlinear Schrodinger Equation显示文摘 | ZHANG JIEFANG DAI CHAOQING YANG QIN | 2005 | Optics Communications2005，252，： | 1 |
| 19 | The relationship among ener-gy prices and energy consumption in China显示文摘 | Yuan Chaoqing Liu Sifeng | 2010 | EnergyPolicy2010，38，： | 1 |
| 20 | 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 |
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