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Warming intensified the effects of nitrogen addition on N_(2)O emissions from alpine meadow in the northern Qinghai-Tibet Plateau

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Advances in Climate Change Research 2024年第1期15卷 101-112页

作者： Ming-Jie LI Yi-Qing GE Hasbagan GANJURJAV guo-Zheng HU Hong-Bao WU Jun YAN Shi-Cheng HE Qing-Zhu GAO Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China National Agricultural Experimental Station for Agricultural Environment Nagqu 852100China Ecology and Nature Conservation Institute Chinese Academy of ForestryBeijing 100091China College of Resource and Environment Anhui Science and Technology UniversityFengyang 233100China Nagqu Agriculture Animal Husbandryand Prataculture Science and Technology Research and Extension CenterNagqu 852100China Tongliao Experimental Middle school Tongliao 028000China

Warming and nitrogen(N)addition may impact soil nitrous oxide(N_(2)O)emissions,but the relationship between plant community composition and soil microbial activities remains *** a two-year field study in the Qinghai-Tibet Plateau,open-top chambers were used to quantify the effects of warming,N-addition,and their interactions on N_(2)O *** found that the N-addition greatly increased N_(2)O emissions by 77.4.in 2018 when compared to the control *** contrast,warming showed little effect on N_(2)0 emissions but did increase the activity of enzymes associated with soil nitrification and denitrification.A combined effect of warming and N-addition of resulted in 208.6%(2018)and 90.8%(2019)increase in N_(2)0 emissions,respectively,compared to the individual treatments of warming or *** warming in alpine meadows is causally linked to increased legume biomass which is further intensified with the *** legume biomass(p<0.05),soil moisture(p<0.001)and enzyme activity(p<0.001)had a positive effect on N_(2)0 emissions,while diminished microbial carbon/nitrogen(MBC/MBN)(p<0.05)correlated with reduced N_(2)O *** results indicated that N-addition has a positive effect on N_(2)O emissions,and the addition of warming further intensifies this *** increased dominance of legumes and microbial N content contributes to this *** outcomes suggest that warming and atmospheric N deposition can stimulate N_(2)O emissions of alpine meadows inthefuture.

关键词： Alpine meadow Community composition Nitrogen addition Nitrous oxide flux Qinghai-Tibet Plateau Warming

The Impact of FDI from Different Regions on the Technical Efficiency of china’s Industry Enterprises

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The Impact of FDI from Different Regions on the Technical Ef...

第三届教学管理与课程建设学术会议

作者： Feng He 1 , Zhixiu Yang 2 , Liya Sun 3.Doling school of Economics and Management, university of Science & Technology beijing, beijing, china

Based on the data of 2008 National Economic Census in china, this paper builds the SFA (Stochastic Frontier Analysis) model and makes an empirical analyse on the impact of FDI from different regions on the technical efficiency of china’s industry enterprises. As is indicated in the result, compared with the FDI from other regions (except Chinese Hong, Macao and Taiwan), the FDI from Chinese Hong, Macao and Taiwan will be relatively helpful to promote technical efficiency of china’s industrial enterprises.

关键词： FDI Different Regions Technical Efficiency Industry Enterprises SFA

Cluster observations of multiple reconnection events in the near-tail

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Cluster observations of multiple reconnection events in the ...

第十二届全国日地空间物理学术讨论会

作者： tang Chao-Ling~1 LU Li~2 LI Zhong-Yuan~1 1)school of Earth and Space sciences.{3. of Science and Technology of {4.,Hefei 23.026 2)Center for Space Science and Applied Research,Chinese Academy of sciences,beijing 100080

＜正＞Using four spacecraft observations from Cluster with a tetrahedron scale of～200 km,we analyzed plasma and field signatures which are associated with the magnetic reconnection region in the near-Earth magnetotail at XGSM=～17.5 RE on September 19,*** speed proton flow,with reversal from tailward to Earthward,was *** clear signatures of Hall quadrupolar （GSM-y） magnetic fields

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Mineral magnetism to probe into the nature of palaeomagnetic signals of subtropical red soil sequences in southern china

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Mineral magnetism to probe into the nature of palaeomagnetic...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Caicai Liu,~(1,2) Chenglong Deng,~1 Qingsong Liu,~1Longting Zheng,~3.ei Wang,~4.Xinming Xu,~5Sheng Huang~(1,2) and Baoyin Yuan~1 1 Paleomagnetism and Geochronology Laboratory(SKL-LE),Institute of Geology and Geophysics,Chinese Academy of sciences,beijing 100029,china. 2 {3. school of the Chinese Academy of sciences,beijing 10004.,china 3.Anhui Museum,Hefei 23.061,china 4.Natural History Museum of Guangxi Zhuang Autonomous Region,Nanning 53.012,china 5 Zhejiang Province Institute of Cultural Relics,Hangzhou 3.0014.china

Magnetic polarity stratigraphy has proved to be useful in dating of both marine and terrestrial sedimentary sequences over the ***,the reliability of magnetostratigraphic results of red soil sequences in subtropical southern china has been found to be variable in different *** probe into the capabilities of recording magnetic polarity stratigraphy in the red soils,three red soil sequences have been selected for detailed mineral magnetic,petrographic and/or palaeomagnetic *** include the Xuancheng and Qiliting sequences,which are located in the lower reaches of the Yangtze River and the Damei sequence in the Bose Basin near the Tropic of *** results indicate that the Xuancheng sequence has recorded the Brunhes Chron and the late Matuyama Chron,including a short interval probably representing the Santa Rosa geomagnetic *** Xuancheng and Qiliting sequences have faithfully recorded the palaeogeomagnetic field behaviour while the Damei sequence has *** mineral magnetic and petrographic measurements suggest that four magnetic minerals(magnetite,maghemite,haematite and goethite)are contained in the three studied sequences,but the characteristic remanent magnetization(ChRM)carriers are *** the Xuancheng and Qiliting samples,the ChRM carriers are magnetite and haematite,which are all of detrital ***,the ChRMs of Damei samples are carried by pedogenic haematite with an unblocking temperature(T)of about 63.-64.℃,which has overprinted the primary remanence of the Damei red soil *** pedogenic haematite is mainly produced by chemical weathering,which is commonly intensified by the climate of high temperature and *** further suggests that climatic conditions have a great effect on the nature of palaeomagnetic signals of the red soil *** addition,the red pigment components in the red soils may be used to indicate the degree of remagnetization.

关键词： Magnetic mineralogy and petrology Magnetostratigraphy Asia

英国督学的权威性与专业性及其对我国督导制度的思考

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外国教育研究 2008年第12期35卷 67-72页

作者：王璐教育部人文社会科学重点研究基地北京师范大学比较教育研究中心北京师范大学国际与比较教育研究所北京100875

专业性和独立性是英国教育督导制度的两大特点,这一方面是由于英国教育管理体制的传统所致,在分权和自治的同时需要国家的监督,在实行国家监控的同时又要保持对专业人员的尊重和对专业自治文化的保护;另一方面是出于对教育督导性质的认... 详细信息

专业性和独立性是英国教育督导制度的两大特点,这一方面是由于英国教育管理体制的传统所致,在分权和自治的同时需要国家的监督,在实行国家监控的同时又要保持对专业人员的尊重和对专业自治文化的保护;另一方面是出于对教育督导性质的认识所致,督导的性质是一种专业性问责模式,是一种高度专业化的问责制度,英国督导制度的影响和核心权威来自于督导制度专业化程度的高度发展。

关键词：英国督导制度权威性专业性

Preliminary Ferrographic Study of the Wear Particles in Synovial Fluid of Human Knee Joints

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International Journal of Minerals,Metallurgy and Materials 1997年第4期11卷 24-27页

作者： GU Thenqiu LOU Siquan SHI Xuesu ZHANG Xianghong XIAO Jiumei YANG Lin(Materials Science and Engineering school, USTB, beijing 100083. china) (Third Hospital of beijing Medical university)

The technique of ferrography has been applied to study the wear particles in synovial fluid of human knee joints. As a result some discrete, identifiable kinds of wear particles were found and various wear mechanisms, for example, adhesive wear, fatigue wear,etc. were revealed. Ferrographic techique may provide a method for early differential diagnosis, and prognostication concerning the future course of the disease.

关键词： synovial fluid arthritis ferrograph

On the Kinematics Analysis and Motion Planning of the Manipulator of a Mobile Robot

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On the Kinematics Analysis and Motion Planning of the Manipu...

2011 Chinese Control and Decision Conference（CCDC）

作者： Wang Qizhi is with school of Computer and Information Technology,beijing Jiaotong university,{3.,P.R.{4. Xu De is with The Key Laboratory of Complex System and Intelligence Science,Institute of Automation,Chinese Academy of sciences,beijing 100080,{4.

Aiming at realizing the motion planning and use of manipulator mounted on a mobile robot,the kinematical properties of an non-redundant regional manipulator with less than six joints are *** order to keep good manipulability of end-effector of the mobile manipulator,the end-effector pose and workspace analysis were studied.A method by using an inversion of a workspace formulation through analytical expression to benefit manipulators synthesis design and optimization was *** order to perform a grasp task in a remote area,the motion planning of the mobile manipulator was realized based on both the robot movement and the manipulator *** planning for a manipulator that grasps a small object was proposed in practical *** manipulator motion planning based on its workspace and coordination of two manipulators were investigated with safety considerations.

关键词： Manipulator mobile robot kinematics workspace motion planning

A dual-specific CRISPR-Cas nanosystem for precision therapeutic editing of liver disorders

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Signal Transduction and Targeted Therapy 2022年第9期7卷 3198-3201页

作者： Xiaojie Xu Honglin tang Jjiajing guo Huhu Xin Yuan ping College of Pharmaceutical sciences Zhejiang UniversityHangzhou 310058China Department of Medical Oncology Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou 310058China Liangzhu Laboratory Zhejiang University Medical Center1369 West Wenyi RoadHangzhou 311121China

Dear Editor,The most common liver disorders,such as acute liver injury and liver fbrosis,can induce acute or chronic inflammatory responses,which in turn gradually promote the development and progres-sion of the disor... 详细信息

关键词： acute liver disorders

Research on the Construction of an Internet-based Database for Spoken English Testing and Teaching

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Research on the Construction of an Internet-based Database f...

2012 National Conference on Information Technology and Computer Science

作者： Tiezhu Jin school of Languages and Communication Studies beijing Jiaotong university beijing,{4.

The paper concerned starts with the literature review on spoken English teaching in the College English program,in particular weaknesses in college spoken English teaching,in the light of College English Teaching *** continues with discussions from scholars over spoken English teaching models and the necessity of constructing an ecosystem for college spoken English teaching and *** proceeds to expand on the function,contents,characteristics of the spoken English Database and the barriers to establish such a database,in hope of improving spoken English teaching,facilitating teaching spoken English,producing the desired effect of spoken English teaching,and eventually developing students’ abilities to use English in a well-rounded way.

关键词： spoken English database language teaching and learning environment