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Comparative Analysis on Physical Quantity Diagnosis and Wind Profile Radar Data of Two Heavy Rainfalls

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Meteorological and Environmental Research 2013年第5期4卷 9-13,16页

作者： Yunfeng Zhu Mengxi Yang Jie Liu beiyuan wang Haiwei Duo Lianyungang Meteorological Bureau in Jiangsu Province Ocean University of China

[ Objective] The research aimed to contrast physical quantity diagnosis and wind profile radar data of two heavy rainfalls. [ Method ] From circulation background, physical quantity field and wind profile radar data, we analyzed two big rainstorm weather processes （8 -9 July and August 10） in Lianyungang City in 2012. [ Result] Rainstorm generation was related to favorable large-scale circulation situation. The first-stage precipitation during 8 -9 July was warm-zone precipitation, and the precipitation at the second stage was triggered by shear line. Precipitation on August 10 was generated by typhoon low-pressure inverted trough and cold air. Sufficient water vapor content and strong water vapor transportation were favorable for generation of the heavy precipitation. Suction effect by divergence at high layer and convergence at middle and low layers was favorable for maintenance of the strong ascending motion. Occurrence of the heavy precipitation must have ascending motion condition. But it was not that the stronger the ascending motion, the stronger the rainfall intensity. Kindex and θse500 -θse 850 were closely related to rainstorm occurrence. Horizontal wind data of the wind profile radar provided fine structure of the atmospheric horizontal motion at vertical direction, could clearly display vertical structure of the wind field in rainstorm process, and directly reflected change characteristics of the wind field in precipitation process. [ Conclusion] The research could provide reference for future forecast work.

关键词： Heavy rainfall Circulation background Physical quantity field Wind profile radar China

淮北地区一次弱天气尺度强迫背景下MCS过程分析与模拟

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气象科学 2021年第5期41卷 657-667页

作者：安礼政刘安宁宋昊冬夏网萍王蓓元淮安市气象局江苏淮安223000 江苏省气象台南京210041

利用多源观测资料和WRF中尺度数值模式对2016年8月7日淮北地区一次中尺度对流系统(Mesoscale Convective Systerm,MCS)过程进行诊断分析和模拟。结果表明,本次MCS过程发生在弱天气尺度强迫背景场下,系统性上升运动较弱,对流层低层存在... 详细信息

利用多源观测资料和WRF中尺度数值模式对2016年8月7日淮北地区一次中尺度对流系统(Mesoscale Convective Systerm,MCS)过程进行诊断分析和模拟。结果表明,本次MCS过程发生在弱天气尺度强迫背景场下,系统性上升运动较弱,对流层低层存在较弱的源自西北太平洋的偏东风转东南风的水汽输送作用;MCS移动和形态变化与地面辐合线演变特征较为一致,地面流场的演变与降水强度之间有着密切的联系;WRF模式较好地模拟出本次降水的分布特征以及MCS演变过程中对流活动和地面辐合线相互作用的特征。模拟结果表明,本次过程中MCS在逐渐南移过程中完成了对流单体的更替,地面辐合线在此过程中发挥重要作用,并且处于不同发展阶段的对流单体环境场的对流不稳定度的垂直分布存在明显差异。

关键词： MCS 弱天气尺度强迫地面辐合线中尺度数值模式

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淮安地区臭氧浓度预报方程的建立与检验

中国环境监测 2024年第6期40卷 80-93页

作者：孙达云王腾飞郭伟震王蓓元淮安市气象局江苏淮安223001 淮安市淮安区气象局江苏淮安223200

通过分析2016—2019年淮安地区近地面臭氧浓度与相关气象因子的变化关系,建立臭氧浓度预报模型,并利用2020年数据对预报模型进行检验。结果表明:有利于高浓度臭氧形成的气象条件是适宜的地面气压和高层位势高度,较高的地面温度和高层温... 详细信息

通过分析2016—2019年淮安地区近地面臭氧浓度与相关气象因子的变化关系,建立臭氧浓度预报模型,并利用2020年数据对预报模型进行检验。结果表明:有利于高浓度臭氧形成的气象条件是适宜的地面气压和高层位势高度,较高的地面温度和高层温度,适宜的地面相对湿度和高层露点温度差,地面和高层有较小的风速和特定的风向,适宜的总辐射辐照度、较低的总云量和低云量以及长时间的日照。定义高浓度臭氧潜势指数(HOPI)和风向指数(WDI),并结合地面和高层气象因子,建立多指标叠套的臭氧浓度预报方程。利用2020年数据对臭氧浓度预报方程进行检验,发现其预报值与实况值的相关系数为0.83,说明预报方程具有较好的拟合效果和可预报性。

关键词：臭氧气象因子臭氧预报多元回归

回流作用对江淮地区两次浮尘天气过程影响的差异研究

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气象科学 2024年第2期44卷 338-348页

作者：王蓓元谢真珍安礼政宋昊冬肖晨淮安市气象局江苏淮安223000

本文以2021年3月16、28日两次沙尘天气为例,利用地面常规气象观测资料、气象再分析资料,结合气溶胶激光雷达、风廓线雷达、HYSPLIT模型等分析了影响江淮地区的两次沙尘天气发生时天气系统、颗粒物浓度、气溶胶光学特性和边界层气象条件... 详细信息

本文以2021年3月16、28日两次沙尘天气为例,利用地面常规气象观测资料、气象再分析资料,结合气溶胶激光雷达、风廓线雷达、HYSPLIT模型等分析了影响江淮地区的两次沙尘天气发生时天气系统、颗粒物浓度、气溶胶光学特性和边界层气象条件变化等特征,特别探讨了回流作用的影响。结果表明:两次均为浮尘天气,与暖区新生类蒙古气旋的活动有关。对江淮地区的影响分为冷锋后部污染物影响和高压后部污染物回流影响。前者容易引发单峰型2~4 h污染物爆发性增长,后者对应多峰型7~9 h污染物持续增长,最终产生1000μg·m^(-3)以上的严重污染。污染物均来源于蒙古和贝加尔湖,经过华北后传输高度降低至1 km以下,回流阶段的传输高度较低,仅为0.3 km左右。传输层风速加强至8~14 m·s^(-1)有利于污染物在地面的长时间影响。

关键词：浮尘 PM_(10)爆发性增长蒙古气旋回流江淮地区

A novel microfluidic flow-cytometry for counting numbers of single-cell β-actins

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Nanotechnology and Precision Engineering 2020年第3期3卷 156-161页

作者： Lixing Liu beiyuan Fan Hongyu Yang Deyong Chen Shuang Zhang Junbo wang Jian Chen State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

As a house keeping protein with stable expressions, β-actin is used as a loading control in normalization of western blotting. However, the actual numbers of β-actins at the single-cell level remain elusive. Based on a homedeveloped flow cytometry, single-cell numbers of β-actin from 8 cell types(subtypes) and 2 tumour patient samples were quantified as 9.62 ± 4.29 × 105(A549, Ncell= 14,242), 6.46 ± 3.34 × 105(Hep G2, Ncell= 35,932),1.58 ± 0.90 × 106(MCF 10 A, N6 cell= 16,650), 1.08 ± 0.48 × 10(HeLa, Ncell= 26,151), 7.60 ± 4.34 × 105(PC3, Ncell= 11,922), 1.10 ± 0.72 × 106(SACC-83, Ncell= 13,616), 8.58 ± 4.54 × 105(CAL 27, Ncell= 7271),9.00 ± 4.69 × 105(CAL 27-LN2, Ncell= 6222), 8.26 ± 4.48 × 105(Oral Tumour Patient I, Ncell= 359), and8.19 ± 5.12 × 105(Oral Tumour Patient II, Ncell= 175), and were analyzed by statistical approaches including one-way analysis of variance, neural network based pattern recognition and Bayesian estimation, with varied expressions of β-actins among different cell types located. The dataset reported in this study may serve as a reference in future studies of quantitative protein analysis.

关键词： Single-cellβ-actin quantification Cell line and subset Tumour sample Large dataset Statistical analysis

The m6A methylation landscape stratifies hepatocellular carcinoma into 3 subtypes with distinct metabolic characteristics

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Cancer Biology & Medicine 2020年第4期17卷 937-952页

作者： Xiaotian Shen beiyuan Hu Jing Xu Wei Qin Yan Fu Shun wang Qiongzhu Dong Lunxiu Qin Department of General Surgery Huashan Hospital&Cancer Metastasis Institute&Institutes of Biomedical SciencesFudan UniversityShanghai 250040China Institutes of Biomedical Sciences Fudan UniversityShanghai 200032China Shanghai Medical College Fudan UniversityShanghai 200040China

Objective:Epigenetic aberration plays an important role in the development and progression of hepatocellular carcinoma(HCC).However,the alteration of RNA N6-methyladenosine(m6A)modifications and its role in HCC progression remain *** therefore aimed to provide evidence using bioinformatics ***:We comprehensively analyzed the m6A regulator modification patterns of 605 HCC samples and correlated them with metabolic alteration *** elucidated 390 gene-based m6A-related signatures and defined an m6Ascore to quantify m6A *** then assessed their values for predicting prognoses and therapeutic responses in HCC ***:We identified 3 distinct m6A modification patterns in HCC,and each pattern had distinct metabolic *** evaluation of m6A modification patterns using m6Ascores could predict the prognoses,tumor stages,and responses to sorafenib treatments of HCC patients.A nomogram based on m6Ascores showed high accuracy in predicting the overall survival of *** area under the receiver operating characteristic curve of predictions of 1,3,and 5-year overall survivals were 0.71,0.69,and 0.70 in the training cohort,and in the test cohort it was 0.74,0.75,and 0.71,respectively.M6Acluster C1,which corresponded to hypoactive mRNA methylation,lower expression of m6A regulators,and a lower m6Ascore,was characterized by metabolic hyperactivity,lower tumor stage,better prognosis,and lower response to sorafenib *** contrast,m6Acluster C3 was distinct in its hyperactive mRNA methylations,higher expression of m6A regulators,and higher m6Ascores,and was characterized by hypoactive metabolism,advanced tumor stage,poorer prognosis,and a better response to *** m6Acluster,C2,was intermediate between C1 and ***:HCCs harbored distinct m6A regulator modification patterns that contributed to the metabolic heterogeneity and diversity of *** of m6A gene signatures and the m6Ascore

关键词： Hepatocellular carcinoma RNA N6-methyladenosine,metabolism,bioinformatics,prognosis

A FINITE AMPLITUDE ANALYSIS OF TUNNEL DEFORMATION BY THE FINITE ELEMENT METHOD WITH HIGHLY VISCOUS FLUID

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Acta Mechanica Sinica 1985年第1期1卷 27-36页

作者： wang Ren Liang beiyuan Sun Xunying (Department of Geology,Peking University) 1. Department of Geology Peking University Beijing China

A finite element method for highly viscous fluid is used to calculate the velocity andstress fields in the surrounding soft rock of a tunnel. In order to fit the calculated values with themeasured displacement of tunn... 详细信息

关键词： finite element method tunnel highly viscous fluid

Heavy metal pollution increases soil microbial carbon limitation:Evidence from ecological enzyme stoichiometry

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Soil Ecology Letters 2021年第3期3卷 230-241页

作者： Mingzhe Xu Yongxing Cui Jingzi beiyuan Xia wang Chengjiao Duan Linchuan Fang State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of SciencesMinistry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China School of Environment and Chemical Engineering Foshan UniversityFoshan 528000China CAS Center for Excellence in Quaternary Science and Global Change Chinese Academy of SciencesXi’an 710061China

Heavy metals can exist in soil for a long time and seriously affect soil *** coexistence of various heavy metal pollutants leads to biotoxicity and alters the activity of *** microbial metabolism plays an important role in nutrient cycling and biochemical processes of soil ***,the effects of heavy metal contamination on microbial metabolism in soil are still *** study aims to reveal the responses of microbial metabolic limitation to heavy metals using extracellular enzyme stoichiometry,and further to evaluate the potential impacts of heavy metal pollution on soil nutrient *** results showed that soil microbial metabolism reflected by the ecoenzymatic activities had a significant response to soil heavy metals *** metabolism was limited by soil carbon(C)and phosphorus(P)under varied heavy metal levels,and the increase of heavy metal concentration significantly increased the microbial C limitation,while had no effect on microbial P *** may increase the energy investment in metabolism to resist heavy metal stress and thus induce C *** results suggest that energy metabolism selected by microorganisms in response to long-term heavy metal stress could increase soil C release,which is not conducive to the soil C *** study emphasizes that ecoenzymatic stoichiometry could be a promising methodology for evaluating the toxicity of heavy metal pollution and its ecological effects on nutrient cycling.

关键词： Heavy metal contamination Microbial metabolisms Ecoenzymatic stoichiometry Soil nutrient limitation

Stability of potentially toxic elements in municipal sludge biochars modified by MgCl2 and phosphate

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Waste Disposal and Sustainable Energy 2023年第1期5卷 13-23页

作者： Qiqi Huang Siqi Chen Jinhao Lin Jingzi beiyuan Jin wang Juan Liu Yundang Wu Xiaolian Wu Fuhua Li Wenbing Yuan Chengrong Nie School of Environmental and Chemical Engineering Foshan UniversityFoshan528000China School of Food Science and Technology Foshan UniversityFoshan528000China Foshan Engineering and Technology Research Center for Contaminated Soil Remediation School of Environmental and Chemical EngineeringFoshan UniversityFoshan528000China School of Environmental Science and Engineering Key Laboratory of Water Quality and Conservation in the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou510006China Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management Institute of Eco-Environmental and Soil SciencesGuangdong Academy of SciencesNational-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South ChinaGuangzhou510650China

Municipal wastewater sludge can be pyrolyzed as biochars to better use nutrients and stabilize carbon compared with other typical technologies,such as landfill and ***,sludge-derived biochars might contain large amounts of potentially toxic elements(PTEs),such as Zn,Cu,Cr,Ni,Pb,and *** stability of PTEs in biochars might be improved by higher pyrolytic temperatures,which can be further improved by different ***,PO4-modification at 300°C and Cl-modification at 700°C were carried out,respectively,to enhance the stability of *** leaching tests have been performed to assess the stability of PTEs in biochars,including the synthetic precipitation leaching procedure(SPLP),toxicity characteristic leaching procedure(TCLP),diethylenetriamine pentaacetate(DTPA)extraction,and in vitro simple bioaccessibility extraction test(SBET).The morphological structure,elemental mapping,and mineral formation of the pristine and modified biochars were studied by scanning electron microscopy–energy-dispersive X-ray spectroscopy(SEM–EDS)and X-ray diffraction(XRD).Our results suggested that the leachability,mobility,plant-availability,and bioaccessibility of most PTEs were decreased by pyrolysis,yet the total contents of PTEs were elevated,especially at 700°***,modification by phosphates and MgCl2 enhanced the stability of PTEs in ***,it should be noted that higher bioaccessibility of PTEs was observed in biochars of P-modification than Cl-modification,which is associated with the dissolution of phosphate precipitates under acidic conditions(pH<2).Additionally,Cl-modification leads to higher plant-available Zn and Cu and bioaccessible Zn compared with the unmodified biochar produced at 700°C.

关键词： Biochar modification Sludge biochar Sewage sludge utilization Chlorination Pyrolysis Heavy metals