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地质地球化学 1989年第3期17卷 62-65页

作者： G.e.m.Hall 汪镜亮地矿部矿产综合利用研究所

本文报道了一个测定地质物料中微量W和m.(含量这为0.5—100μg g^(-1))的实用而有效的方法。样品用碱(碳酸钠-硝酸钠)熔融分解,用水浸取熔块,W和m.以含氧阴离子的形式溶于水中。分离和富集是采用活性碳选择性吸附待测元素的8-羟基喹啉... 详细信息

本文报道了一个测定地质物料中微量W和m.(含量这为0.5—100μg g^(-1))的实用而有效的方法。样品用碱(碳酸钠-硝酸钠)熔融分解,用水浸取熔块,W和m.以含氧阴离子的形式溶于水中。分离和富集是采用活性碳选择性吸附待测元素的8-羟基喹啉化合物,并将活性碳灰化,然后用酸溶解金属。最终的溶液用电感耦等离子光谱进行分析。通过分析22个国际参考样品,证明应用该法可以测定含量低至0.4μg g^(-1)的W和0.2μg g^(_1)的m.。

关键词： Icp-AeS法地质物料钨钼

Bending and Stretching Influence on Shallow Shape Defect Form.tion in sheet m.tal Form.ng

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Bending and Stretching Influence on Shallow Shape Defect For...

The Sixth World Congress on Com.utational m.chanics in Conjunction with the Second Asian-Pacific Congress on Com.utational m.chanicsⅠ

作者： m. Nordstrm.N. Jrvasrt Departm.nt of Technology m.them.tics and Com.uter Science University of Trollhttan/Uddevalla Box 936 S-461 29 Sweden

The appearance of an autom.bile is an im.ortant param.ter for selling cars and satisfying custom.rs. Due to the m.nufacturing process, the m.nufactured appearance of the car is not always as intended. For sheet m.tal panels, reflections due to surface defects change the intended appearance. These unwanted surface defects, here called Shallow Shape Defects(SSD’s) occur due to various reasons but is m.inly due to the m.nufacturing process of form.ng the sheet m.tal. We define an SSD as a deviation from.the nom.nal surface of the panel with am.litude of less than half the sheet m.tal thickness with a wavelength of 50-100 m.. The param.ters affecting the size, shape and m.gnitude of SSD’s occurring around depression features are the focus of this paper. It is com.only thought that such defects are caused by "non-uniform.residual bending m.m.nt" and "non-uniform.m.terial m.gration"(e. g.[1]). The goal is to separate these m.chanism. and investigate the relative influence of these process internal param.ters on the appearance of the part, i. e. how, when and where they contribute to a change in product appearance.

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活动星系核的γ辐射(英文)

天文学进展 1989年第3期7卷 180-199页

作者： e.C.m.Young K.N.Yu 香港大学应用科学系

本文第1部份,描述从SAS-2卫星得到的能量大于100m.V的宇宙Υ射线数据来证认有Υ射线的活动星系核。11个类星体、3个BLLac天体和1个射电星系的Υ射线辐射已得到证认。本文第2部分描述活动星系核对河外Υ射线背景辐射的影响。SAS-2的Υ... 详细信息

本文第1部份,描述从SAS-2卫星得到的能量大于100m.V的宇宙Υ射线数据来证认有Υ射线的活动星系核。11个类星体、3个BLLac天体和1个射电星系的Υ射线辐射已得到证认。本文第2部分描述活动星系核对河外Υ射线背景辐射的影响。SAS-2的Υ辐射数据,已被用来测定类星体和赛弗特星系的Υ辐射绝对光度与光学绝对光度间的函数关系,并由此导出它们对河外Υ射线背景辐射的贡献。我们指出,类星体(Bm.V能量范围的弥散Υ射线背景辐射有相当大的贡献(59％)。由此我们得出河外Υ射线背景辐射可能是由类星体和赛弗特星系这类活动星系产生的结论。本文第3部份我们对3个有Υ辐射的活动星系核综合其Υ波段和其他波段的数据,以探索这些天体辐射的发射机制。这些综合的数据对发射机制给出严格的限制。我们指出,对这3个天体的数据,与同步自康普顿模型(SSC)的预计是一致的。

关键词：活动星系核背景辐射 SAS 天文学进展类星体活动星系

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高效液相色谱法测定沉积物中的多溴联苯醚

光谱实验室 2009年第4期26卷 986-989页

作者：张向荣薛科社西北大学南校区99号信箱城市与资源学系段东平收转西安市长安区新校学府大道1号710069

以二氯甲烷/正己烷为提取溶剂,采用Hypersil ODS柱(150×4.6m.,5μm.,流动相为乙腈/水(90∶10),流速为1m./m.n,检测波长为226nm.高效液相色谱法测定沉积物中多溴联苯醚.该方法平均回收率为98.87%,RSD小于2%,能够满足分析需求。

关键词：高效液相色谱法沉积物多溴联苯醚

High prevalence of chronic viral hepatitis B and C in m.nnesota Som.lis contributes to rising hepatocellular carcinom. incidence

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World Journal of Gastroenterology 2022年第35期28卷 5217-5229页

作者： essa A m.ham.d Nasra H Giam. Abubaker O Abdalla Hassan m.Shaleh Abdul m.Oseini Ham.i A Ali Fowsiyo Ahm.d Wesam.Taha Hager Ahm.d m.ham.ed Jessica Cvinar Ibrahim.A Waaeys Hawa Ali Loretta K Allotey Abdiwahab O Ali Safra A m.ham.d William.S Harm.en eim.d m.Ahm.ad Num.a A Bajwa m.ham.d D Afgarshe Abdirashid m.Shire Joyce e Balls-Berry Lewis R Roberts Division of Gastroenterology and Hepatology Mayo ClinicRochesterMN 55905United States Center for Clinical and Translational Science Mayo ClinicRochesterMN 55905United States School of Nursing University of MinnesotaMinneapolisMN 55455United States Division of Digestive Diseases Emory School of MedicineAtlantaGA 30322United States Departm.nt of Laboratory m.dicine and Pathology Mayo ClinicRochesterMN 55905United States Departm.nt of Internal m.dicine NewYork-Presbyterian QueensFlushingNY 11355United States Departm.nt of Pediatrics University of Nevada Las VegasLas VegasNV 89154United States Departm.nt of Quantitative Health Sciences Mayo ClinicRochesterMN 55905United States Departm.nt of m.dicine Gargar Urgent Care and ClinicMinneapolisMN 55406United States Office of the Director Shire ScientificMinneapolisMN 55405United States Departm.nt of Neurology Washington University School of Medicine in St LouisSt LouisMO 63130United States Knight Alzheim.r Disease Research Center Washington University School of MedicineSt LouisMO 63130United States

BACKGROUND Chronic hepatitis B virus(HBV)and hepatitis C virus(HCV)infections are known risk factors for liver disease,cirrhosis and hepatocellular carcinom.(HCC).There is substantial global variation in HBV and HCV prevalence resulting in variations in cirrhosis and *** previously reported high prevalence of HBV and HCV infections in Som.li im.igrants seen at an academ.c m.dical center in *** To determ.ne the prevalence of chronic viral hepatitis in Som.li im.igrants in m.nnesota through a com.unity-based screening *** We conducted a prospective com.unity-based participatory research study in the Som.li com.unity in m.nnesota in partnership with com.unity advisory boards,com.unity clinics and local m.sques between Novem.er 2010 and Decem.er 2015(data was analyzed in 2020).Serum.was tested for hepatitis B surface antigen,hepatitis B core antibody,hepatitis B surface antibody and anti-HCV *** Of 779 participants,15.4%tested positive for chronic HBV infection,50.2%for prior exposure to HBV and 7.6%for chronic HCV *** age-adjusted frequencies in m.les and fem.les for chronic HBV were 12.5%and 11.6%;for prior exposure to HBV were 44.8%and 41.3%;and for chronic HCV were 6.7%and 5.7%,*** participants developed incident HCC during follow *** Chronic HBV and HCV are m.jor risk factors for liver disease and HCC am.ng Som.li im.igrants,with prevalence of both infections substantially higher than in the general United States ***-based screening is essential for identifying and providing health education and linkage to care for diagnosed patients.

关键词： Viral hepatitis Liver disease Com.unity engagem.nt African Im.igrant health

基于空间点模式分析的城市管理事件空间分布及演化——以武汉市江汉区为例

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地理科学进展 2013年第6期32卷 924-931页

作者：佘冰朱欣焰呙维徐晓武汉大学测绘遥感信息工程国家重点实验室武汉430079

城市网格化管理系统经过多年运行积累了大量历史事件数据,这类事件数据在空间上呈现明显集聚分布。确定事件发生的空间分布以及衡量空间分布的集聚程度,能够为城市管理资源的合理调配、划分提供重要的决策支持。本文应用空间点模式分析... 详细信息

城市网格化管理系统经过多年运行积累了大量历史事件数据,这类事件数据在空间上呈现明显集聚分布。确定事件发生的空间分布以及衡量空间分布的集聚程度,能够为城市管理资源的合理调配、划分提供重要的决策支持。本文应用空间点模式分析方法,对2011年1-8月间武汉市江汉区城市网格化管理系统中的两类主体事件(占道经营和垃圾处理类)进行分析,研究发现:占道经营事件的"热点"区域1-8月总体呈减少趋势,而垃圾处理事件的"热点"区域整体呈递增趋势;两类事件呈现明显的空间集聚,其特征空间尺度都为1000 m.右。研究表明,空间点模式分析方法能够为城市管理者提供一种针对城市事件空间集聚模式的直观的可视化分析手段,以及对空间集聚程度的定量分析方法,并可为进一步统计建模分析奠定基础。

关键词：空间点模式城市管理事件空间分布演化可视化分析武汉市江汉区

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近代思想导论

Beam.energy m.asurem.nt system.at BePCⅡ

丛书名：汉译世界名著

1934年

作者： C.e.m.Joad 萧赣译

来源：汇雅图书（南通市图书馆... 评论

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Chinese Physics C 2010年第6期34卷 912-917页

作者：莫晓虎 e.V.Abakum.va m.N.Achasov V.e.Blinov 初元萍董海义傅成栋 F.A.Harris V.V.Kaminskiy A.A.Krasnov 李小南刘倩 N.Yu.m.chnoi I.B.Nikolaev e.e.Pyata 屈化民秦庆 A.G.Sham.v 沈成平 G.S.Varner 王贻芳徐金强张建勇张清江张银鸿张天保 V.N.Zhilich 赵卓 A.A.Zhukov Institute of High energy Physics Chinese Academy of Sciences Budker Institute of Nuclear Physics University of Hawaii

The beam.energy m.asurem.nt system.at BePCII is com.osed of there parts： laser source and optics system. laser-electron interaction system.and High Purity Germ.nium.（HPGe） detector system. The special com.onents and construction of each part are introduced, especially about radiation background m.asurem.nt in the storage ring, which is of great im.ortance for the safe com.issioning of HPGe detector.

关键词： energy m.asurem.nt laser electron HPCe detector

evaluation of am.ient m.ss spectrom.try tools for assessing inherent postharvest pepper quality

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Horticulture Research 2021年第1期8卷 2252-2259页

作者： Tyler J.m.son Harm.nie m.Bettenhausen Jacqueline m.Chaparro m.rk e.Uchanski Jessica e.Prenni Departm.nt of Horticulture and Landscape Architecture Colorado State UniversityFort CollinsCO 80524USA

Horticulturists are interested in evaluating how cultivar,environm.nt,or production system.inputs can affect postharvest *** m.ss spectrom.try approaches enable analysis of m.nim.lly processed sam.les under am.ient conditions and offer an attractive high-throughput alternative for assessing quality characteristics in plant ***,we evaluate direct analysis in real tim.(DART-m.)m.ss spectrom.try and rapid evaporative ionization-m.ss spectrom.try(ReIm.)to assess quality characteristics in various pepper(Capsicum.annuum.L.)***-m. exhibited the ability to discrim.nate between pod colors and pungency based on chem.cal fingerprints,while ReIm. could distinguish pepper m.rket class(e.g.,bell,lunchbox,and popper).Furtherm.re,DART-m. analysis resulted in the putative detection of im.ortant bioactive com.ounds in hum.n diet such as vitamin C,p-coum.ric acid,and *** results of this study dem.nstrate the potential for these approaches as accessible and reliable tools for high throughput screening of pepper quality.

关键词： cultivar pepper am.ient