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Formation Reason Analysis and Defense Countermeasure of Rare Frozen Disaster in Guizhou in 2008

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Meteorological and Environmental Research 2011年第3期2卷 57-60,64页

作者： HUANG Tian-fu1,LIU Peng1,yuan Hui1,KANG An-na2 1.Liupanshui Meteorological observatory in Guizhou Province,Liupanshui 553001,china 2.Library of Liupanshui Normal College,Liupanshui 553004,china

[Objective] The research aimed to discuss the formation reason of low temperature and frozen disaster weather event in Guizhou in 2008.[Method] By using T213,ECMWF numerical forecast data and the conventional meteorological observation data which were provided by MICAPS,according to the variation situations of frozen rain,freezing,road freezing and ground surface 0 ℃ line range,the weather situation evolution characteristic of low temperature and frozen weather process (congelation for short) in Guizhou from January 13 to February 15,2008 was *** formation reason of low temperature and frozen disaster weather event in Guizhou was discussed,and the defense countermeasure was put forward.[Result] The low temperature and frozen weather process happened when the continuous precipitation was caused by that every scale weather system intersected in Guizhou under the abnormal atmospheric circulation *** Asian inverted Ω flow type in the northern hemisphere made that the atmospheric circulation stabilized for a long time,and the north branch frontal zone was by *** polar cold air continued to complement and went south to affect Jiangnan,South *** south branch westerly fluctuation was active,and the frontal zone intensity of stationary front was big,which maintained for a long time.850 hPa shear line in the low level maintained to swing in the junction of Guangxi and Guizhou,*** southwest warm and wet airflow continued transporting to the south of *** cold and warm air intersected in South china,which caused the long-time precipitation in *** thermal inversion layer was deep and *** long-time precipitation based generally on the light *** was easy to form the supercooled water *** verglas range expanded from Guizhou,the south of Hunan to the north of *** frozen rain and frozen weather caused the long-time road and wire *** disaster was *** ground surface temperature 0 ℃ line cover

关键词： Frozen disaster Formation reason analysis Disaster defense Guizhou china

强力定眩片联合盐酸倍他司汀注射液治疗后循环缺血性眩晕的效果

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中国实用医刊 2024年第12期51卷 80-83页

作者：汪建平原航漯河医学高等专科学校第三附属医院内科漯河462000

目的分析强力定眩片联合盐酸倍他司汀注射液治疗后循环缺血性眩晕的效果。方法队列研究。抽取2021年6月至2022年12月漯河医学高等专科学校第三附属医院收治的后循环缺血性眩晕患者90例,按照随机数字表法分为单一组和联合组,每组45例。... 详细信息

目的分析强力定眩片联合盐酸倍他司汀注射液治疗后循环缺血性眩晕的效果。方法队列研究。抽取2021年6月至2022年12月漯河医学高等专科学校第三附属医院收治的后循环缺血性眩晕患者90例,按照随机数字表法分为单一组和联合组,每组45例。单一组予以盐酸倍他司汀注射液治疗,联合组在单一组的治疗基础上联合强力定眩片治疗。比较两组临床疗效、症状消失时间(眩晕、恶心呕吐、耳鸣、肢体/头面部麻木)及不良反应发生率;比较两组治疗前后眩晕程度[眩晕障碍调查量表(DHI)评分]、血流动力参数(基底动脉、右椎动脉、左椎动脉)水平、血液流变学(全血低切黏度、血浆纤维蛋白原、血浆黏度)水平。结果联合组治疗总有效率(95.56%,43/45)高于单一组(75.56%,34/45),P1、2周,联合组DHI评分低于单一组(P2/45)与单一组(8.89%,4/45)比较差异未见统计学意义(P>0.05)。结论强力定眩片联合盐酸倍他司汀注射液治疗后循环缺血性眩晕患者,可改善血液循环和血液流变学情况,减轻临床症状,且安全性良好。

关键词：眩晕后循环强力定眩片盐酸倍他司汀注射液

上海市宠物犬和猫毕氏肠微孢子虫和卡耶塔环孢子虫感染情况及分子特性研究

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中国寄生虫学与寄生虫病杂志 2024年第1期42卷 63-68页

作者：秦源刘华王雅雪张璟苏雅馨曹建平沈玉娟中国疾病预防控制中心寄生虫病预防控制所(国家热带病研究中心) 传染病溯源预警与智能决策全国重点实验室国家卫生健康委员会寄生虫病原与媒介生物学重点实验室世界卫生组织热带病合作中心科技部国家级热带病国际研究中心上海200025 上海交通大学医学院国家热带病研究中心全球健康学院上海200025

目的了解上海市宠物犬、猫毕氏肠微孢子虫和卡耶塔环孢子虫感染情况及分子特征,评估人兽共患传播风险。方法2021年11月—2022年6月,采集上海市某宠物医院犬和猫的新鲜粪样,提取粪样基因组Dna,巢式PCR扩增毕氏肠微孢子虫核糖体内转录间隔... 详细信息

目的了解上海市宠物犬、猫毕氏肠微孢子虫和卡耶塔环孢子虫感染情况及分子特征,评估人兽共患传播风险。方法2021年11月—2022年6月,采集上海市某宠物医院犬和猫的新鲜粪样,提取粪样基因组Dna,巢式PCR扩增毕氏肠微孢子虫核糖体内转录间隔区(ITS)和卡耶塔环孢子虫小亚基核糖体Rna(SSU rRna)序列,阳性产物经双向测序后在GenBank数据库中进行BLAST比对。使用MEGA 11.0软件基于邻接法构建系统进化树。结果本研究共采集145份粪样(犬粪样99份、猫粪样46份),毕氏肠微孢子虫总阳性率为4.1%(6/145),卡耶塔环孢子虫总阳性率为4.8%(7/145);犬的毕氏肠微孢子虫和卡耶塔环孢子虫阳性率分别为3.0%(3/99)和6.1%(6/99),猫的毕氏肠微孢子虫和卡耶塔环孢子虫阳性率分别为6.5%(3/46)和2.2%(1/46)。6条毕氏肠微孢子虫ITS序列与人源基因型A(GenBank登录号:MK982500)的序列一致性均为100%,归在组1;7条卡耶塔环孢子虫SSU rRna序列与人源卡耶塔环孢子虫(GenBank登录号:KJ569533)的序列一致性均为100%。系统进化树分析结果显示,毕氏肠微孢子虫分离株与已报道的人源毕氏肠微孢子虫基因型A分离株归为同一分支,卡耶塔环孢子虫的分离株与已报道的人源卡耶塔环孢子虫分离株归为同一分支。结论上海市宠物犬、猫中存在毕氏肠微孢子虫和卡耶塔环孢子虫感染,均为人兽共感染型虫株。

关键词：毕氏肠微孢子虫卡耶塔环孢子虫宠物人兽共患病

Multiwavelength study of low-luminosity 6.7-GHz methanol masers

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Research in Astronomy and Astrophysics 2011年第2期11卷 137-155页

作者： yuan-Wei Wu,Ye Xu and Ji Yang Purple Mountain observatory,Chinese Academy of Sciences,nanjing 210008,china Purple Mountain observatory Chinese Academy of Sciences Nanjing 210008 China

We present results of 13CO（1-0）,C18O（1-0）,and HCO＋（1-0） map observations and N2H＋（1-0） single point observations directed towards a sample of nine low-luminosity 6.7-GHz masers.N2H ＋ line emission has been detected from six out of nine sources,C18O line emission has been detected from eight out of nine sources,and HCO ＋ and 13CO emission has been detected in all *** particular,a ＂blue profile＂ of the HCO ＋ spectrum,a signature of inflow,is found towards one *** integrated intensity emission maps,we identified 17 cores in the *** them,nine cores are closely associated with low-luminosity methanol *** these cores,we derive the column densities,core sizes,masses and molecular *** of our results with similar molecular line surveys towards the southern sky methanol masers indicates that linewidths of our sample,including only the low-luminosity masers,are smaller than the sample that includes both lowand high-luminosity *** the maser associated cores,their gas masses have the same order of magnitude as their virial masses,indicating that these cores are gravitationally bound *** addition,we have found from our observations that the low-luminosity methanol masers tend to coexist with H2O masers and outflows rather than with OH masers.

关键词： masers -- ISM: abundances -- ISM: molecules -- stars: formation

Reconciled estimation of Antarctic ice sheet mass balance and contribution to global sea level change from 1996 to 2021

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Science china Earth Sciences 2024年第11期67卷 3562-3578页

作者： Rongxing LI Guojun LI Gang HAI Huan XIE yuan CHENG Wei CHEN Xiangbin CUI Minghu DING Chunchun GAO Tong HAO Changqing KE Chuanjin LI Jin LI Yan LIU Jiangjun RAN Jiawen REN Qiang SHEN Yunzhong SHEN Hongling SHI Songyun wang Zemin wang Jingang ZHAN Baojun ZHANG Min ZHONG Chunxia ZHOU Center for Spatial Information Science and Sustainable Development Applications Tongji University College of Surveying and Geo-informatics Tongji University Institute for the Conservation of Cultural Heritage School of Cultural Heritage and Information Management Shanghai University College of Resource Environment and Tourism Hubei University of Arts and Science Polar Research Institute of china State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences College of Geodesy and Geomatics Shandong University of Science and Technology School of Geography and Ocean Science Nanjing University Shanghai Astronomical observatory Chinese Academy of Sciences State Key Laboratory of Remote Sensing Science Faculty of Geographical Science Beijing Normal University Department of Earth and Space Sciences Southern University of Science and Technology State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences Center for Space Research University of Texas at Austin Chinese Antarctic Center of Surveying and Mapping Wuhan University School of Geospatial Engineering and Science Sun Yat-sen University

The Antarctic Ice Sheet（AIS） has been losing ice mass and contributing to global sea level rise（GSLR）. Given its mass that is enough to cause ～58 m of GSLR, accurate estimation of mass balance trend is critical for AIS mass loss monitoring and sea level rise forecasting. Here, we present an improved approach to reconciled solutions of mass balance in AIS and its regions from multiple contributing solutions using the input-out, altimetric, and gravimetric methods. In comparison to previous methods, such as IMBIE 2018, this approach utilizes an adaptive data aggregation window to handle the heterogeneity of the contributing solutions, including the number of solutions, temporal distributions, uncertainties, and estimation techniques. We improved the regression-based method by using a two-step procedure that establishes ensembled solutions within each method（input-output, altimetry, or gravimetry） and then estimates the method-independent reconciled solutions. For the first time, 16contributing solutions from 8 Chinese institutions are used to estimate the reconciled mass balance of AIS and its regions from1996 to 2021. Our results show that AIS has lost a total ice mass of ～3213±253 Gt during the period, an equivalent of～8.9±0.7 mm of GSLR. There is a sustained mass loss acceleration since 2006, from 88.1±3.6 Gt yr-1during 1996–2005 to 130.7 ±8.4 Gt yr-1during 2006–2013 and further to 157.0±9.0 Gt yr-1during 2014–2021. The mass loss signal in the West Antarctica and Antarctic Peninsula is dominant and clearly presented in the reconciled estimation and contributing solutions, regardless of estimation methods used and fluctuation of surface mass balance. Uncertainty and challenges remain in mass balance estimation in East Antarctica. This reconciled estimation approach can be extended and applied for improved mass balance estimation in the Greenland Ice Sheet and mountain glacier regions.

关键词： Antarctic Ice Sheet Ice mass loss acceleration Sea level rise Reconciled estimation

Analysis on Formation Reason of the " 7.28" Regional Rainstorm in Zhongwei

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Meteorological and Environmental Research 2011年第11期2卷 37-41页

作者： NIE Jing-xin 1,BAI Ling 2,LI Bao-hua 2,ZHANG De-you 2,YANG yuan 2 1.Ningxia Meteorological observatory,Yinchuan 750002,china 2.Zhongwei Meteorological Bureau in Ningxia,Zhongwei 755000,china

[Objective] The research aimed to analyze formation reason of the ' 7.28' regional rainstorm in Zhongwei City.[Method] NCEP /NCAR reanalysis data and Micaps routine data were used to analyze formation reason of the regional rainstorm in Zhongwei City on July 28,2011.[Result]Under the east-high-west-low circulation situation,factors which caused this rainstorm included westerly jet at 200 hPa,cold trough at 500 hPa,low vortex and shear line at 700 hPa,quick alternation of the warm and cold airs at 850 hPa,stable northward movement of the subtropical *** zone of the rainstorm was located at the right of the upper jet,the left of the low-level jet and the south of 700 hPa shear *** on the each physical quantity field showed that water vapor condition,vertical motion,energy,vorticity,divergence and wind field distribution over the rainstorm area were all beneficial for rainstorm *** the rainstorm occurred,radar echo mainly presented as mixed-cloud precipitation *** echo intensity was from 30 to 45 dBz,and top height of the echo was from 7 to 8 km.[Conclusion]The research provided some experiences and theoretical guidance for future rainstorm forecast in Zhongwei City.

关键词： Regional rainstorm Influence system Diagnostic analysis Radar echo china

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自驱修孔钻头动力参数及钻齿结构研究

煤田地质与勘探 2024年第4期52卷 179-189页

作者：刘勇李阳魏建平苑永旺代硕李林豫河南理工大学瓦斯地质与瓦斯治理国家重点实验室培育基地河南焦作454000 河南理工大学煤炭安全生产与清洁高效利用省部共建协同创新中心河南焦作454000

自驱修孔钻头是修复失效长钻孔的有效技术手段,为进一步提高修孔速度和瓦斯抽采效果,本文基于射流反冲理论,分析了射流反冲力与喷嘴参数的关系,构建了自驱修孔钻头旋转力学理论模型。采用LS-DYna开展不同结构钻齿破煤过程,分析了不同钻... 详细信息

自驱修孔钻头是修复失效长钻孔的有效技术手段,为进一步提高修孔速度和瓦斯抽采效果,本文基于射流反冲理论,分析了射流反冲力与喷嘴参数的关系,构建了自驱修孔钻头旋转力学理论模型。采用LS-DYna开展不同结构钻齿破煤过程,分析了不同钻进压力和扭矩作用下钻齿对煤体破坏形式和钻齿破煤体积变化规律,并开展了破煤实验验证数值模拟结果。形成了自驱修孔钻头参数确定方法,设计了自驱修孔钻头,并在郑煤集团超化煤矿22煤柱面底抽巷进行了工程实验。研究结果表明:(1)喷嘴张角α和偏心角β是决定钻进压力和扭矩分配的关键参数,通过调控张角和偏心角可实现钻进压力和扭矩的最优匹配。(2)相同钻进参数条件下,钻齿结构对破煤体积影响较大,阶梯钻齿破煤效果最优。在钻进压力为120N、扭矩0.6N·m时,阶梯型钻齿结构的修孔钻头能够实现钻进压力和扭矩最优匹配。(3)确定了最优修孔钻头结构参数为:钻头外径28 mm;后置喷嘴张角20°,偏心角90°;前置喷嘴张角90°,偏心角0°。(4)工程应用结果表明:瓦斯抽采纯量提高了1.96倍,瓦斯抽采体积分数提高了3.98倍,修孔速度提高了1.2倍。通过改进钻头动力参数及优化钻齿结构,设计的自驱修孔钻头在工程实践中达到了提高修孔速度和瓦斯抽采效果的目的。

关键词：瓦斯抽采钻孔修复钻进压力钻齿结构煤矿

Cloning, expression and characterization of human tissue-specific Dna polymerase λ2

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Science china(Life Sciences) 2007年第4期50卷 457-465页

作者： GU Fu1, YOU Chun1, LIU jianping1, CHEN Ao1,,YU Yao1, wang Xiang1, WAN DaFang2, GU JianRen2, yuan HanYing1, LI YuYang1 & Lü Hong1 1 State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200433, china 2 State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai 200032, china Present address: Food Inspection and Supervision Institute of Shanxi Province, No. 222 Changzhi Road, Taiyuan 030012, china 1. State Key Laboratory of Genetic Engineering Institute of Genetics School of Life Sciences Fudan University Shanghai 200433 China 2. State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China

Dna polymerase (POL) λ plays an important role during Dna repair and Dna nonhomologous recom-bination processes. A novel POL λ variant was cloned from a human liver cDna library and named POL λ2 (GenBank Accession No. AY302442). POL λ2 has 2206 base pairs in length with an open reading frame of 1452 base pairs encoding a 482-amino-acids protein. Bioinformatics analysis reveals that POL λ2 spans 7.9 kb on human chromosome 10q24 and is composed of 8 exons and 7 introns. It has the specific domain of Dna polymerase X family-POL Xc at the C-terminus and BRCT domain at the N-terminus. POL λ2 was localized predominantly in nucleus in transfected L0-2 cells. It was expressed abundantly in liver and testis, weakly in ovary, and undetectably in other tested human tissues. In comparison with the expression ratio between POL λ and POL λ2 in normal liver tissues and hepato-cellular carcinoma (HCC) adjacent tissues, the ratio was aberrant in 80% of those 15 HCC specimens examined due to the up-regulated expression of POL λ. This abnormality might be involved in hepato-carcinogenesis. The recombinant POL λ2 with His-tag was expressed as a soluble active protein in E. coli BL21 (DE3)CONDON Plus and purified by Ni-NTA resin and then desalted by Superdex-75 chro-matography in an FPLC system. The analysis using isotope α-32P-dCTP incorporation in vitro showed that the purified recombinant POL λ2 exhibited Dna polymerase activity.

关键词： POL λ2 gene cloning expression purification Dna polymerase activity hepatocellular carcinoma

基于空间决策模型的耕-果错位空间分析与协调布局优化

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农业工程学报 2024年第6期40卷 330-338,F0003页

作者：张运平林建平黄艺敏袁浩冯桂贤张佩怡赣南师范大学地理与环境工程学院赣州341000 江西省城市固废低碳循环技术重点实验室赣州341000

当前农业生产“空间错位、功能错乱”问题严重,优化耕地果园布局,实现耕地下山果树上山,对改善耕地质量、优化耕地空间布局具有重要意义。该研究以林果业为主导农业的江西省赣州市寻乌县为例,在耕-果空间错位矛盾下,以耕地质量评价为基... 详细信息

当前农业生产“空间错位、功能错乱”问题严重,优化耕地果园布局,实现耕地下山果树上山,对改善耕地质量、优化耕地空间布局具有重要意义。该研究以林果业为主导农业的江西省赣州市寻乌县为例,在耕-果空间错位矛盾下,以耕地质量评价为基础,耦合地形空间与地理学定义划定“山上山下”以识别耕-果错位空间,在矛盾优化原则下应用GIS技术构建空间决策模型协调优化果园与耕地的空间布局。研究表明:1)寻乌县耕地细碎,质量评价结果为Ⅰ级的耕地面积为2227.02 hm^(2),占总耕地面积的24.17%;Ⅴ级面积为671.70 hm^(2),占7.29%;地形空间划分的“山下”空间占24.06%,“山上”空间占48.19%。2)以“山上山下”为分区标准,在耕地适宜性评价结果下初划耕地空间为保护区与拟调区,初划林果空间为宜耕区、宜果区与保留区,拟调区与宜耕区为耕-果发生错位的空间,耕地错位面积1221.77 hm^(2),果园错位面积5169.39 hm^(2)。3)按矛盾协调原则在空间决策模型下优化耕-果错位空间,最终结果为1247.25 hm^(2)的“山下”果园调为耕地,1221.77 hm^(2)的“山上”耕地调整为果园。研究结果优化了耕-果空间布局,提高了耕地质量,可为当前“山上”换“山下”优化耕地布局工作提供参考与理论依据。

关键词：土地利用耕地林果化空间错位空间决策布局优化