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24篇 您的检索式:作者名="Jinjun JI"
    题名 作者 年代 出处 被引量
1Prediction of carbon exchanges between China terrestrial ecosystem and atmosphere in 21st century显示文摘The projected changes in carbon exchange between China terrestrial ecosystem and the atmosphere and vegetation and soil carbon storage during the 21st century were investigated using an atmos-phere-vegetation interaction model (AVIM2). The results show that in the coming 100 a, for SRES B2 scenario and constant atmospheric CO2 concentration, the net primary productivity (NPP) of terrestrial ecosystem in China will be decreased slowly, and vegetation and soil carbon storage as well as net ecosystem productivity (NEP) will also be decreased. The carbon sink for China terrestrial ecosystem in the beginning of the 20th century will become totally a carbon source by the year of 2020, while for B2 scenario and changing atmospheric CO2 concentration, NPP for China will increase continuously from 2.94 GtC·a?1 by the end of the 20th century to 3.99 GtC·a?1 by the end of the 21st century, and vegetation and soil carbon storage will increase to 110.3 GtC. NEP in China will keep rising during the first and middle periods of the 21st century, and reach the peak around 2050s, then will decrease gradually and approach to zero by the end of the 21st century.JI JinJun HUANG Mei LI KeRang 2008Science China Earth Sciences2008,51,6:48
2Development of Land Surface Model BCC_AVIM2.0 and Its Preliminary Performance in LS3MIP/CMIP6显示文摘The improvements and validation of several parameterization schemes in the second version of the Beijing Climate Center Atmosphere–Vegetation Interaction Model(BCC_AVIM2.0) are introduced in this study. The main updates include a replacement of the water-only lake module by the common land model lake module(Co LM-lake) with a more realistic snow–ice–water–soil framework, a parameterization scheme for rice paddies added in the vegetation module, renewed parameterizations of snow cover fraction and snow surface albedo to accommodate the varied snow aging effect during different stages of a snow season, a revised parameterization to calculate the threshold temperature to initiate freeze(thaw) of soil water(ice) rather than being fixed at 0°C in BCC_AVIM1.0, a prognostic phenology scheme for vegetation growth instead of empirically prescribed dates for leaf onset/fall, and a renewed scheme to depict solar radiation transfer through the vegetation canopy. The above updates have been implemented in BCC_AVIM2.0 to serve as the land component of the BCC Climate System Model(BCC_CSM). Preliminary results of BCC_AVIM in the ongoing Land Surface, Snow, and Soil Moisture Model Intercomparison Project(LS3 MIP) of the Coupled Model Intercomparison Project Phase 6(CMIP6) show that the overall performance of BCC_AVIM2.0 is better than that of BCC_AVIM1.0 in the simulation of surface energy budgets at the seasonal timescale. Comparing the simulations of annual global land average before and after the updates in BCC_AVIM2.0 reveals that the bias of net surface radiation is reduced from-12.0 to-11.7 W m-2 and the root mean square error(RMSE) is reduced from 20.6 to 19.0 W m-2;the bias and RMSE of latent heat flux are reduced from 2.3 to-0.1 W m-2 and from 15.4 to14.3 W m-2, respectively;the bias of sensible heat flux is increased from 2.5 to 5.1 W m-2 but the RMSE is reduced from 18.4 to 17.0 W m-2.Weiping LI Yanwu ZHANG Xueli SHI Wenyan ZHOU Anning HUANG Mingquan MU Bo QIU Jinjun JI 2019Journal of Meteorological Research2019,33,5:14
3The terrestrial NPP simulations in China since Last Glacial Maximum显示文摘Based on Atmosphere-Vegetation Interaction Model (AVIM), the magnitude and spatial distribution of terrestrial net primary productivity (NPP) in China is simu-lated during three different geological eras, Last Glacial Maximum (LGM), Mid-Holocene (MH) and the present. The simulation shows that the glacial-interglacial variation of East Asian summer monsoon in China is the key factor af-fecting the NPP change. During the three eras, mean NPPs are 208 g/m2·a, 409 g/m2·a, and 355 g/m2·a. The total NPPs are 2.05 Pg/a, 3.89 Pg/a and 3.33 Pg/a, respectively. The ter-restrial NPP in China during warm-humid climate is larger than that during cold-arid eras, and the correlation analysis between NPP and climate factors suggests that temperature is the primary factor affecting the terrestrial NPP during 21 kaBP (LGM), and for 6 kaBP (MH) and the present the pri-mary factor is precipitation.HE Yong DAN Li DONG Wenjie JI Jinjun QIN Dahe 2005Chinese Science Bulletin2005,50,18:7
4Mesocrystalline TiO2/sepiolite composites for the effective degradation of methyl orange and methylene blue显示文摘Ruirui LIU Zhijiang JI Jing WANG Jinjun ZHANG 2018Frontiers of Materials Science2018,12,3:4
5DNA Self‐Assembly of Targeted Near‐Infrared‐Responsive Gold Nanoparticles for Cancer Thermo‐Chemotherapy显示文摘Zeyu Xiao Changwei Ji Jinjun Shi Eric M. Pridgen Jillian Frieder Jun Wu Omid C. Farokhzad 2012Angew Chem Int Ed2012,,47:1
6New Algorithm Rules Out Acute-on-chronic Liver Failure Development within 28 Days from Acute Decompensation of Cirrhosis显示文摘Background and Aims:Approximately 10%of patients with acute decompensated(AD)cirrhosis develop acute-on-chronic liver failure(ACLF)within 28 days.Such cases have high mortality and are difficult to predict.Therefore,we aimed to establish and validate an algorithm to identify these patients on hospitalization.Methods:Hospitalized patients with AD who developed ACLF within 28 days were considered pre-ACLF.Organ dysfunction was defined accord-ing to the chronic liver failure-sequential organ failure as-sessment(CLIF-SOFA)criteria,and proven bacterial infec-tion was taken to indicate immune system dysfunction.A retrospective multicenter cohort and prospective one were used to derive and to validate the potential algorithm,re-spectively.A miss rate of<5%was acceptable for the calcu-lating algorithm to rule out pre-ACLF.Results:In the deri-vation cohort(n=673),46 patients developed ACLF within 28 days.Serum total bilirubin,creatinine,international normalized ratio,and present proven bacterial infection at admission were associated with the development of ACLF.AD patients with≥2 organ dysfunctions had a higher risk for pre-ACLF patients[odds ratio=16.58195%confidence interval:(4.271-64.363),p<0.001].In the derivation co-hort,67.5%of patients(454/673)had≤1 organ dysfunction and two patients(0.4%)were pre-ACLF,with a miss rate of 4.3%(missed/total,2/46).In the validation cohort,65.9%of patients(914/1388)had≤1 organ dysfunction,and four(0.3%)of them were pre-ACLF,with a miss rate of 3.4%(missed/total,4/117).Conclusions:AD patients with≤1 organ dysfunction had a significantly lower risk of developing ACLF within 28 days of admission and could be safely ruled out with a pre-ACLF miss rate of<5%.Xiaoting Tang Hai Li Guohong Deng Xin Zheng Xianbo Wang Yan Huang Yanhang Gao Zhongji Meng Zhiping Qian Feng Liu Xiaobo Lu Yu Shi Beiling Li Wenyi Gu Xiaomei Xiang Yan Xiong Yixin Hou Jun Chen Na Gao Sen Luo Liujuan Ji Jing Li Rongjiong Zheng Haotang Ren Jinjun Chen 2023Journal of Clinical and Translational Hepatology2023,11,3:1
7陆面模式中氮循环过程的引入2:中国碳氮通量基线数据与变化特征显示文摘在陆面模式AVIM中模拟了1979-2015年中国碳氮通量的时空特征,碳通量GPP和NPP的模拟优于MODIS和TRENDY资料的结果。与CMIP6和CABLE模式的结果相比,AVIM对氮沉降和生物固氮模拟效果良好,在中国南部地区大于4 g N m^-2yr^-1。模拟GPP和NPP在中国南方地区变化可达300和200 g C m^-2yr^-1,这与MODIS和TRENDY结果有差异,反映了季风区碳氮耦合的难度和必要性。中国南部氮沉降和生物固氮标准差可达0.8-1.2 g N m^-2yr^-1,距平和标准差评估是减小碳氮通量模拟偏差的关键。DAN Li YANG Xiujing YANG Fuqiang PENG Jing LI Yueyue GAO Dongdong JI Jinjun HUANG Mei 2020Atmospheric and Oceanic Science Letters2020,13,6:1
8A cfimate vegetation interaction model:simulatin gphysical and biological processes at the surface显示文摘 1995Journal ofBiogeography1995,22,:1
9How to improve the care of septic patients following'Surviving Sepsis Campaign:International Guidelines for Management of Sepsis and Septic Shock 2021'?显示文摘The updated global adult sepsis guidelines(guideline-2021),released in October 2021 by the Surviving Sepsis Campaign(SSC),place increased emphasis on improving the care of patients with sepsis.These evidence-based guidelines,published in Critical Care Medicine[1]and Intensive Care Medicine,[2]reflect practices and recommendations for the treatment of sepsis and septic shock in adults and are revised regularly to account for new research.Baoji Hu Wentao Ji Lulong Bo Jinjun Bian 2023Journal of Intensive Medicine2023,3,2:1
10A climate-vegetation interaction model: Simulating physical and biological processes at the surface 显示文摘Ji Jinjun 1995Journal of Biogeography1995,22,:1
11Science with the 2.5-meter Wide Field Survey Telescope(WFST)显示文摘The Wide Field Survey Telescope(WFST) is a dedicated photometric surveying facility being built jointly by University of Science and Technology of China(USTC) and the Purple Mountain Observatory(PMO). It is equipped with a 2.5-meter diameter primary mirror, an active optics system, and a mosaic CCD camera with 0.73 gigapixels on the primary focal plane for highquality image capture over a 6.5-square-degree field of view. The installation of WFST near the summit of Saishiteng mountain in the Lenghu region is scheduled in summer of 2023, and the operation is planned to start three months later. WFST will scan the northern sky in four optical bands(u, g, r and i) at cadences from hourly/daily in the deep high-cadence survey(DHS) program, to semi-weekly in the wide field survey(WFS) program. During a photometric night, a nominal 30 s exposure in the WFS program will reach a depth of 22.27, 23.32, 22.84, and 22.31(AB magnitudes) in these four bands, respectively, allowing for the detection of a tremendous amount of transients in the low-z universe and a systematic investigation of the variability of Galactic and extragalactic objects. In the DHS program, intranight 90 s exposures as deep as 23(u) and 24 mag(g), in combination with target of opportunity follow-ups, will provide a unique opportunity to explore energetic transients in demand for high sensitivities, including the electromagnetic counterparts of gravitational wave events, supernovae within a few hours of their explosions,tidal disruption events and fast, luminous optical transients even beyond redshift of unity. In addition, the final 6-year co-added images, anticipated to reach g■25.8 mag in WFS or 1.5 mags deeper in DHS, will be of fundamental importance to general Galactic and extragalactic science. The highly uniform legacy surveys of WFST will serve as an indispensable complement to those of the Vera C. Rubin Observatory's Legacy Survey of Space and Time(LSST) that monitors the southern sky.Tinggui Wang Guilin Liu Zhenyi Cai Jinjun Geng Min Fang Haoning He Ji-an Jiang Ning Jiang Xu Kong Bin Li Ye Li Wentao Luo Zhizheng Pan Xuefeng Wu Ji Yang Jiming Yu Xianzhong Zheng Qingfeng Zhu Yi-Fu Cai Yuanyuan Chen Zhiwei Chen Zigao Dai Lulu Fan Yizhong Fan Wenjuan Fang Zhicheng He Lei Hu Maokai Hu Zhiping Jin Zhibo Jiang Guoliang Li Fan Li Xuzhi Li Runduo Liang Zheyu Lin Qingzhong Liu Wenhao Liu Zhengyan Liu Wei Liu Yao Liu Zheng Lou Han Qu Zhenfeng Sheng Jianchun Shi Yiping Shu Zhenbo Su Tianrui Sun Hongchi Wang Huiyuan Wang Jian Wang Junxian Wang Daming Wei Junjie Wei Yongquan Xue Jingzhi Yan Chao Yang Ye Yuan Yefei Yuan Hongxin Zhang Miaomiao Zhang Haibin Zhao Wen Zhao 2023Science China(Physics,Mechanics & Astronomy)2023,66,10:1
12A climate-vegetation interaction model:Simulating physical and biological processes at the surface显示文摘Ji Jinjun 1995Journal of Biogeography1995,22,:1
13A climate-vegetation interaction model: simulating physical and biological processes at the surface显示文摘 1995Journal of Biogeography1995,22,:1
14A climate-vegetation interaction model: Simulating physical and biological processes at the surface显示文摘Ji Jinjun 1995Journal of Biogeography1995,22,:1
15Global carbon bud gets simulated by the Beijing Climate Center Climate System Model for the last century显示文摘Wu Tongwen Li Weiping Ji Jinjun 2014Journal of Geophysical Research2014,118,10:1
16Crop yield responses to climate change in the Huang-Huai-Hai Plain of China显示文摘Suxia Liu Xingguo Mo Zhonghui Lin Yueqing Xu Jinjun Ji Gang Wen Jeff Richey 2010Agricultural Water Management2010,,8:1
17The ecosystem carbon accumulation after conversion of grasslands to pine plantations in subtropical red soil of South China 显示文摘MEI HUANG JINjUN JI KERANG LI 2007J Tellus2007,59,:1
18A climate-vegetation interaction model:Sim- ulating physical and biological processes at the surface 显示文摘Ji Jinjun 1995Journal of Biogeography1995,22,23:1
19陆面模式中氮循环过程的引入Ⅰ:模式介绍及站点验证(英文)显示文摘陆地生态系统氮循环对碳循环过程及其对气候变化的反馈具有重要的影响,但当前陆面模式多数都没有考虑氮循环过程对碳循环过程的限制。本研究基于氮在土壤-植被-大气中的传输交换过程,将氮循环过程引入到陆面模式AVIM(Atmosphere-Vegetation Interaction Model)中,发展形成包含碳氮耦合过程的新版模式AVIM-CN。与2004-05年当雄生态系统定位站通量观测数据相对比,模式中引入氮循环过程后,高寒草甸的总初级生产力模拟值从1.1403 gC m^(-2)d^(-1)降到了0.7073 gC m^(-2)d^(-1),前者更接近通量站的观测值0.5407 gC m^(-2)d^(-1)。生态系统呼吸的模拟值也从1.7695 gC m^(-2)d^(-1)降到了1.0572 gC m^(-2)d^(-1),更接近对应的通量观测值0.8034 gC m^(-2)d^(-1)。整体而言,在模式中考虑氮的限制作用后,当雄站的热量通量和碳通量的模拟值更接近实测值。不考虑氮过程对碳过程的限制,模式高估了约40%的陆地生态系统碳通量。YANG Xiujing DAN Li YANG Fuqiang PENG Jing LI Yueyue GAO Dongdong JI Jinjun HUANG Mei 2019Atmospheric and Oceanic Science Letters2019,12,1:1
20Ethyl Acetate Fraction in Hedyotis Diffusa Willd Inhibits T Cell Proliferation to Improve the Pathogenesis of Systemic Lupus Erythematosus显示文摘Background:Abnormal proliferation of T cells plays an essential role in the pathogenesis of Systemic lupus erythematosus(SLE).The pharmaceutical effect of Hedyotis Diffusa Willd(HDW)on SLE has been investigated previously.Nevertheless,the biomedical mechanism is still left unclear.Objective:This study has been arranged to evaluate the therapeutic effect of the ethyl acetate fraction of HDW(EAHDW)on lupus mice and explore the potential therapeutic mechanism.Methods:EAHDW was prepared with 80%ethanol reflex extraction followed by successive extraction,and ana-lyzed with HPLC and UPLC-Q/TOP-MS.The potential targets and STAT3 affinity regulators were predicted with network pharmacology.The pharmaceutic effect of EAHDW was studied with MRL/lpr mice.Cytokines and au-toantibodies were quantified with ELISA assays.The pathological damage of glomerulus and STAT3 expression in the kidney was detected with histochemical and immunohistochemical techniques.The cell cycle properties in cell proliferation were identified with the flow cytometry.The western blot and dual-Luciferase reporter assay were applied to evaluate translational and transcriptional activity of STAT3,respectively.Results:In this study,the extraction ratio of EAHDW was 2.7±1%,in which 19 ingredients were identified.Network pharmacological analysis showed that the target genes of EAHDW were highly focused on influencing the abnormal T cell proliferation in SLE.EAHDW showed the beneficial effects on pathological changes and STAT3 expression in the glomerulus of lupus mice,and the levels of cytokines and autoantibodies in serum.In cytological study,EAHDW treatment attenuated the transcription and phosphorylation of STAT3,which inhibited T cell proliferation by prolonged S-phase of the cell cycle.A total of 5 compounds in EAHDW exhibited high docking affinity to the DNA-binding site of STAT3.Conclusion:EAHDW could reduce the inflammatory response and inhibit the proliferation of T cells by interfering with the STAT3 signaling pathway,thereby playing a therapeutic effect on SLE.Yahui Lai JinJun Ji Ying Li Jingqun Liu Xinhui Lan Weihong Ge Li Xu Yongsheng Fan Bin Ding 2021Clinical Complementary Medicine and Pharmacology2021,1,1:0
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