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Rising trends of global precipitable water vapor and its correlation with flood frequency

Geodesy and Geodynamics 2023年第4期14卷 355-367页

作者： Dong ren yong wang Guocheng wang Lintao Liu State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China University of Chinese Academy of Sciences Beijing 100049China Tianjin Chengjian University Tianjin 300384China

Using 4 global reanalysis data sets, significant upward trends of precipitable water vapor(PWV) were found in the 3 time periods of 1958-2020, 1979-2020, and 2000-2020. During 1958-2020, the global PWV trends obtained using the ERA5 and JRA55 data sets are 0.19 ± 0.01 mm per decade(1.15 ± 0.31%)and 0.23 ± 0.01 mm per decade(1.45 ± 0.32%), respectively. The PWV trends obtained using the ERA5,JRA55, NCEP-NCAR, and NCEP-DOE data sets are 0.22 ± 0.01 mm per decade(1.18 ± 0.54%),0.21 ± 0.00 mm per decade(1.76 ± 0.56%), 0.27 ± 0.01 mm per decade(2.20 ± 0.70%) and 0.28 ± 0.01 mm per decade(2.19 ± 0.70%) for the period 1979-2020. During 2000-2020, the PWV trends obtained using ERA5, JRA55, NCEP-DOE, and NCEP-NCAR data sets are 0.40 ± 0.25 mm per decade(2.66 ± 1.51%),0.37 ± 0.24 mm per decade(2.19 ± 1.54%), 0.40 ± 0.26 mm per decade(1.96 ± 1.53%) and 0.36 ± 0.25 mm per decade(2.47 ± 1.72%), respectively. Rising PWV has a positive impact on changes in precipitation,increasing the probability of extreme precipitation and then changing the frequency of flood ***, exploring the relationship between PWV(derived from ERA5 and JRA55) change and flood disaster frequency from 1958 to 2020 revealed a significant positive correlation between them, with correlation coefficients of 0.68 and 0.79, respectively, which explains the effect of climate change on the increase in flood disaster frequency to a certain extent. The study can provide a reference for assessing the evolution of flood disasters and predicting their frequency trends.

关键词： Precipitable water vapor(PWV) Linear trend Correlation analysis Flood frequency

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The Hilbert expansion of the Boltzmann equation in the incompressible Euler level in a channel

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Science China Mathematics 2025年第1期 39-88页

作者： Feimin Huang Weiqiang wang yong wang Feng Xiao Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Key Laboratory of Computing and Stochastic Mathematics (Ministry of Education) School of Mathematics and StatisticsHunan Normal University

The study of the hydrodynamic limit of the Boltzmann equation with physical boundary is a challenging problem due to the appearance of the viscous and Knudsen boundary *** this paper,the hydrodynamic limit from the Boltzmann equation with the specular reflection boundary condition to the incompressible Euler equations in a channel is *** on the multi-scaled Hilbert expansion,the equations with boundary conditions and compatibility conditions for interior solutions,and viscous and Knudsen boundary layers are derived under different scaling,***,some uniform estimates for the interior solutions,and viscous and Knudsen boundary layers are *** the help of the L2-L∞framework and the uniform estimates obtained above,the solutions to the Boltzmann equation are constructed by the truncated Hilbert expansion with multiscales,and hence the hydrodynamic limit in the incompressible Euler level is justified.

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蛋白酶体抑制剂硼替佐米对K562细胞株NF-κB活性及ICAM-1表达的影响

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中国实验血液学杂志 2008年第5期16卷 1006-1009页

作者：陆世丰陆化沈文怡张建富刘澎王永韧王丽霞杨慧李建勇南京医科大学第一附属医院血液科江苏南京210029 南京医科大学附属儿童医院血液科江苏南京210008

为了研究蛋白酶体抑制剂硼替佐米对急性白血病K562细胞株核因子κB(NF-κB)及细胞间黏附分子(ICAM-1)表达的影响,用含10%小牛血清的RPMI1640培养液体外培养K562细胞,用0、10、20、30、50、100nmol/L的硼替佐米干预K562细胞6小时后收集... 详细信息

为了研究蛋白酶体抑制剂硼替佐米对急性白血病K562细胞株核因子κB(NF-κB)及细胞间黏附分子(ICAM-1)表达的影响,用含10%小牛血清的RPMI1640培养液体外培养K562细胞,用0、10、20、30、50、100nmol/L的硼替佐米干预K562细胞6小时后收集细胞。用SP免疫组织化学法测各组细胞NF-κB活性,并以反转录聚合酶链反应(RT-PCR)分析K562细胞ICAM-1表达的变化。结果表明:各药物处理组K562细胞NF-κB的活性和ICAM-1的表达均明显受抑制,与对照组相比,存在显著性差异(p<0.05),且各组NF-κB活性与ICAM-1表达成正相关。结论:蛋白酶体抑制剂硼替佐米可能通过抑制NF-κB活性下调细胞间黏附分子ICAM-1的表达,这为白血病靶向治疗提供了一个新的途径。

关键词：硼替佐米 K562细胞 NF-κB 细胞间黏附分子

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Rotating-Symmetric Solutions for Nonlinear Systems with Symmetry

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Acta Mathematicae Applicatae Sinica 2015年第2期31卷 307-312页

作者： Hong-ren wang Xue YANG yong LI College of Mathematics Jilin University College of Mathematics Jilin Normal University School of Mathematics and Statistics Northeast Normal University Center for Mathematics and Interdisciplinary Sciences Northeast Normal University

It is proved that if a nonlinear system possesses some group-symmetry, then under certain transversality it admits solutions with the corresponding symmetry. The method is due to Mawhin＇s guiding function one.

关键词： rotating-symmetric solutions guiding functions Brouwer degree

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基于SBAS-InSAR和光学遥感的天津市北部山区潜在滑坡识别研究

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灾害学 2025年第1期40卷 30-35页

作者：王勇邢振涛李锁闫勇司甜天津城建大学地质与测绘学院天津300384 天津市地质工程勘测设计院有限公司天津300191

以天津市北部山区为研究对象,开展潜在滑坡识别研究,利用差分干涉测量短基线集时序分析技术(SBAS-InSAR)处理2018-01—2022-08的56景Sentinel-1A数据,并结合2018—2022年的Landsat8光学遥感影像,分析形变与光学遥感影像特征以及NDVI,筛... 详细信息

以天津市北部山区为研究对象,开展潜在滑坡识别研究,利用差分干涉测量短基线集时序分析技术(SBAS-InSAR)处理2018-01—2022-08的56景Sentinel-1A数据,并结合2018—2022年的Landsat8光学遥感影像,分析形变与光学遥感影像特征以及NDVI,筛选出潜在滑坡区域。研究结果表明:基于SBAS-InSAR技术识别的天津北部山区的形变较大区域有20处,使用光学遥感影像结合各发育环境要素进行处理确定的区域有19处,其中5处经两种技术确认为滑坡隐患,通过对该5处沉降信息进行识别分析,该5处区域最大年形变速率可达-12 mm/a,需要进行重点监测预警,使用两种技术结合对滑坡隐患区域进行识别可以有效地提高识别准确度,为天津北部山区灾害监测提供新的方式。

关键词：潜在滑坡 SBAS-InSAR 光学遥感影像天津市北部山区

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G2-LIKE CAROTENOID REGULATOR(SlGCR)is a positive regulator of lutein biosynthesis in tomato

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aBIOTECH 2022年第4期3卷 267-280页

作者： Siyan ren yong Yuan Hsihua wang Yang Zhang Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu610064China Sanya Institute of China Agricultural University Sanya572025China Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of HorticultureChina Agricultural UniversityBeijing100193China

Lutein is an oxygen-containing carotenoid synthesized in plant chloroplasts and *** plays an indispensable role in promoting plant growth and maintaining eye health in *** rate-limiting step of lutein biosynthesis is catalyzed by the lycopeneε-cyclase enzyme(LCYE).Although great progress has been made in the identification of transcription factors involved in the lutein biosynthetic pathway,many systematic molecular mechanisms remain to be ***,using co-expression analysis,we identified a gene,G2-LIKE CAROTENOID REGULATOR(SlGCR),encoding a GARP G2-like transcription factor,as the potential regulator of SlLCYE in *** of SlGCR reduced the expression of carotenoid biosynthetic genes and the accumulation of carotenoids in tomato *** contrast,overexpression of SlGCR in tomato fruit significantly increased the expression of relevant genes and enhanced the accumulation of *** can directly bind to the SlLCYE promoter and activate its *** addition,we also discovered that expression of SlGCR was negatively regulated by the master regulator SlRIN,thereby inhibiting lutein synthesis during tomato fruit *** together,we identified SlGCR as a novel regulator involved in tomato lutein biosynthesis,elucidated the regulatory mechanism,and provided a potential tool for tomato lutein metabolic engineering.

关键词： Solanum lycopersicum GARP G2-like transcription factor Lutein biosynthesis

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Constitutive Modeling for Thixoforming of 9Cr18 Semi-solid Alloy and 3D Forecast Mapping

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Journal of Iron and Steel Research International 2016年第12期23卷 1309-1315页

作者： Ya-ping LI ren-bo SONG yong-jin wang School of Materials Science and Engineering University of Science and Technology Beijing

Thixotropic Compression tests were carried out on 9Cr18 semi-solid alloy through Gleeble-1500 thermal simulation machine. According to the experiment analysis, macro separation occurred during thixoforming. The liquid film was extruded outside to the surface and solidified to form eutectic structure. The solid particles were connected with each other and underwent plastic deformation. According to the comparison between Zhou-Guan model and modified Zhou-Guan model, it could be observed that the adding of thixotropic factor played an important role in the regression and the latter one was more credible. The modified Zhou-Guan model could well describe the thixoforming behavior. 3D forecast mapping was built for 9Cr18 semi solid alloy in thixoforming temperature range. It would provide valuable information for selecting process parameters during thixoforming in the manufacture process.

关键词： thixoforming constitutive model liquid fraction thixotropic factor 3D forecast

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie wang Wei wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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Hot ductility behavior of a Fe-0.3C-9Mn-2Al medium Mn steel

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International Journal of Minerals,Metallurgy and Materials 2021年第3期28卷 422-429页

作者： yong-jin wang Shuai Zhao ren-bo Song Bin Hu School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The hot ductility of a Fe-0.3C-9Mn-2Al medium Mn steel was investigated using a Gleeble3800 thermo-mechanical *** tensile tests were conducted at different temperatures(600-1300℃)under a constant strain rate of 4×10^(−3)s^(−1).The fracture behavior and mechanism of hot ductility evolution were *** showed that the hot ductility decreased as the temperature was decreased from 1000℃.The reduction of area(RA)decreased rapidly in the specimens tested below 700℃,whereas that in the specimen tested at 650℃was lower than 65%.Mixed brittle-ductile fracture feature is reflected by the coexistence of cleavage step,intergranular facet,and dimple at the *** fracture belonged to ductile failure in the specimens tested between 720-1000℃.Large and deep dimples could delay crack *** change in average width of the dimples was in positive proportion with the change in *** wide austenite-ferrite intercritical temperature range was crucial for the hot ductility of medium Mn *** formation of ferrite film on austenite grain boundaries led to strain *** point elongation occurred at the austenite-ferrite intercritical temperature range during the hot tensile test.

关键词： medium Mn steel hot ductility reduction of area fracture behavior microstructure characterization

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蛋白酶体抑制剂PS-341对U266细胞凋亡和多种细胞因子表达影响的研究

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南京医科大学学报（自然科学版） 2007年第3期27卷 220-223,F0002页

作者：林如峰陆化刘澎王永韧沈文怡费小明葛峥汪承亚南京医科大学第一附属医院血液科

目的：探讨蛋白酶体抑制剂PS-341（bortezomib）诱导多发性骨髓瘤细胞株U266细胞凋亡时对IL-6、IL-1β和SCF细胞因子表达的影响。方法：用含15％FBS的RPM11640培养液体外培养U266细胞，分别用0、50、100、150、200nmol／L的PS-341干预U... 详细信息

目的：探讨蛋白酶体抑制剂PS-341（bortezomib）诱导多发性骨髓瘤细胞株U266细胞凋亡时对IL-6、IL-1β和SCF细胞因子表达的影响。方法：用含15％FBS的RPM11640培养液体外培养U266细胞，分别用0、50、100、150、200nmol／L的PS-341干预U266细胞4h后收集，荧光显微镜观察细胞凋亡，Annexin V-FITC／PI双染法流式细胞术（FCM）检测细胞凋亡率的变化，反转录聚合酶链反应（RT-PCR）分析U266细胞IL-6、IL-1β和SCF三种细胞因子表达的改变。结果：荧光显微镜和FCM发现PS-341以浓度依赖方式诱导U266细胞凋亡；PS-341明显抑制U266细胞IL-6、IL-1β和SCF的表达（P〈0．05）；对IL-6和SCF的抑制与PS-341浓度成正相关，对IL-1β的抑制在PS341浓度为0～150nmol／L时成正比关系，当浓度大于150nmol／L时差异无显著性。结论：蛋白酶体抑制剂PS-341诱导U266细胞凋亡时明显抑制其IL6、IL-1β和SCF的表达，是有效治疗MM的机制之一。

关键词：蛋白酶体抑制剂PS-341 凋亡细胞因子 U266

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