检索结果-南通市图书馆

Optimization of performance of the KM2A full array using the Crab Nebula

Chinese Physics C 2024年第6期48卷 169-178页

作者：曹臻 F.Aharonian 安琪阿西克古白云翔包逸炜 D.Bastieri 毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布 D.della Volpe 董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮 S.Gabici 高博高川东高林青高启高卫高伟康葛茂茂耿利斯 G.Giacinti 龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰 M.Heller 贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通 D.Kuleshov.K.Kurinov 李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振 W.Mitthumsiri 穆慧君南云程 A.Neronov 区子维庞彬宇 P.Pattarakijwanich 裴致远齐孟尧祁业情乔冰强秦家军 D.Ruffolo A.Sáiz D.Semikoz 邵澄宇邵琅 O.Shchegolev 盛祥东舒富文宋慧超 Yu.V.Stenkin V.Stepanov 苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄 LHAASO Collaboration Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Tianfu Cosmic Ray Research Center Chengdu 610000China Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China Hefei 230026China School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Hebei Normal University Shijiazhuang 050024China Key Laboratory of Dark Matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Physics and Astronomy(Zhuhai)&School of Physics(Guangzhou)&Sino-French Institute of Nuclear Engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275China School of Physics and Astronomy Yunnan UniversityKunming 650091China Département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève24 Quai Ernest Ansermet1211 GenevaSwitzerland Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China APC Universit'e Paris Cit'eCNRS/IN2P3CEA/IRFUObservat

The full array of the Large High Altitude Air Shower Observatory(LHAASO)has been in operation since july 2021.For its kilometer-square array(KM2A),we optimized the selection criteria for very high and ultrahigh energyγ-rays using data collected from August 2021 to August 2022,resulting in an improvement in significance of the detection in the Crab Nebula of approximately 15%,compared with that of previous cuts.With the implementation of these new selection criteria,the angular resolution was also significantly improved by approximately 10%at tens of TeV.Other aspects of the full KM2A array performance,such as the pointing error,were also calibrated using the Crab Nebula.The resulting energy spectrum of the Crab Nebula in the energy range of 10-1000 TeV are well fitted by a log-parabola model,which is consistent with the previous results from LHAASO and other experiments.

关键词： γ-ray Crab Nebula significance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

青藏高原及其周边奥陶纪综合地层、生物群与古地理演化

引用

中国科学：地球科学 2024年第4期54卷 992-1025页

作者：方翔甄勇毅王光旭魏鑫陈中阳梁艳武学进李文杰李超詹仁斌张元动现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所南京210008 Geological Survey of New South Wales W.B.Clarke Geoscience CentreNSW 2753Australia 中国科学院大学北京100049

青藏高原奥陶系代表该地区未变质沉积地层的最古老记录,是解读该地区早期地质历史和生物演化的关键层段.青藏高原地区奥陶系底部地层存在不同程度的缺失,但具有下奥陶统弗洛阶、中奥陶统达瑞威尔阶,以及上奥陶统桑比阶、凯迪阶和赫南特... 详细信息

青藏高原奥陶系代表该地区未变质沉积地层的最古老记录,是解读该地区早期地质历史和生物演化的关键层段.青藏高原地区奥陶系底部地层存在不同程度的缺失,但具有下奥陶统弗洛阶、中奥陶统达瑞威尔阶,以及上奥陶统桑比阶、凯迪阶和赫南特阶,可划分为喜马拉雅、冈底斯-察隅、羌塘-昌都、松潘-甘孜、喀喇昆仑-昆仑-阿尔金等地层区,并可与周边的滇缅马、印支、柴达木-祁连、塔里木-天山和扬子区(西缘)等地层区进行综合地层对比.笔石、牙形刺和头足类是青藏高原地区奥陶系最常见的、据以构建该地区生物地层框架的化石门类.青藏高原奥陶纪生物群具有鲜明的生物古地理区系特色,其中头足类在早-中奥陶世以珠角石类繁盛为特征,显示与华北板块具有密切亲缘关系,但到晚奥陶世则以喇叭角石和直角石类繁盛为特征,表现出与华南的密切关系.青藏高原的奥陶纪多门类动物群及其生物古地理演化,为冈瓦纳东北缘地区的奥陶纪古板块重建提供了重要依据.西藏南部喜马拉雅地体、拉萨地体及周边的滇缅马地体在寒武纪晚期-奥陶纪早期经历了库尔加克运动,这次影响深远的构造热事件造成了奥陶纪地层与下伏基底地层之间的角度不整合接触关系,这一间断面在青藏高原大部分地区存在.西藏南部中奥陶统发育鲕粒灰岩和暖水生物群,指示当时位于赤道附近的低纬度地带.喜马拉雅地体及滇缅马地体的上奥陶统普遍发育大套具有网纹结构的海相碳酸盐岩红层,可与华南扬子区的同期地层进行对比,二者可能具有相同或相似的成因背景.奥陶纪末全球性冰期与海平面下降事件也造成了滇西和缅甸掸邦等地区普遍缺失凯迪晚期地层,对青藏高原的申扎和聂拉木等地区也有较大影响.

关键词：奥陶系年代地层岩石地层生物地层生物古地理生物和地质事件

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ablation behavior of(ZrC/SiC)_(3)alternate coating prepared on sharp leading edge C/C composites by CVD

引用

journal of Materials Science & Technology 2022年第20期115卷 129-139页

作者： B.li H.j.li X.Y.Yao X.F.Tian Y.j.jia G.H.Feng State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi׳an 710072China

A(ZrC/SiC)_(3)alternate coating was deposited on sharp leading edge(SLE)C/C composites by chemical vapor deposition(CVD).The ablation behavior was examined via oxyacetylene torch with heat flux of 2.38 MW/m^2.The results indicated that the alternate coating exhibited great ablation resistance,providing an effective protection for C/C composites.In initial rapid heating stage,the(ZrC/SiC)_(3) alternate coating can relieve thermal stress,avoiding the peeling of coating and keeping an intact coating structure.In subsequent ablation,the Si C layers in central region were consumed rapidly,leaving layered interspaces.Three stacked ZrO_(2) layers were reserved with the assistance of the release of thermal stress by interspaces,offering a great anti-scouring effect.In transition and border regions,the alternate Si C layers can delay oxygen erosion of inner coating and C/C substrate by the formation of SiO_(2).It is believed that the results would be helpful for the design and application of anti-ablation coatings on SLE C/C composites.

关键词： Alternate coating ZrC/SiC Sharp leading edge Chemical vapor deposition C/C composites

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

《城市规划与发展》期刊专刊——为了城市可持续发展的绿色基础设施

引用

城市规划学刊 2016年第1期 124-125页

作者： BREUSTE j ARTMANN M li j

以城市公园、森林、行道树、屋项绿化、花园为代表的绿色基础设施,因其承载城市生态服务功能的重要性以及改善城市居民生活质量的提升价值,在城镇化发展中至关重要,在近20年的研究中向来被视为城市生态系统中的重要组成部分。有关城市... 详细信息

以城市公园、森林、行道树、屋项绿化、花园为代表的绿色基础设施,因其承载城市生态服务功能的重要性以及改善城市居民生活质量的提升价值,在城镇化发展中至关重要,在近20年的研究中向来被视为城市生态系统中的重要组成部分。有关城市绿色基础设施的研究往往聚焦于探讨其作为

关键词：绿色基础设施生态系统服务城市可持续发展规划长远计划专刊期刊报刊

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Shear-accelerated crystallization of glass-forming metallic liquids in high-pressure die casting

引用

journal of Materials Science & Technology 2022年第22期117卷 146-157页

作者： L.H.liu W.j.Gao X.S.Huang T.Zhang Z.Y.liu C.Yang W.W.Zhang W.R.li L.li P.j.li National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of TechnologyGuangzhou510640China Department of Mechanical Engineering Tsinghua UniversityBeijing100084China Institute of Eontech New Materials Co. Ltd.Dongguan523662China Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060China

As one of the most important forming technologies for industrial bulk metallic glass (BMG) parts withcomplex shapes, high-pressure die casting (HPDC) can fill a die cavity with a glass-forming metallic liquidin milliseconds. However, to our knowledge, the correlation between flow and crystallization behavior inthe HPDC process has never been established. In this study, we report on the solidification behavior ofZr_(55)Cu_(30)Ni_(5)Al_(10) glass forming liquid under various flow rates. Surprisingly, the resulting alloys display adecreasing content of amorphous phase with increase of flow rate, i.e. increase of cooling rate, suggestingthat crystallization kinetics of glass-forming metallic liquids in the HPDC process is strongly dependenton the flow field. Analysis reveals that the accelerated crystallization behavior is mainly ascribed to therapid increase in viscosity with a decreasing temperature as well as to the huge shear effect in the glassforming liquid at the end stage of the filling process when the temperature is close to the glass-transitionpoint;this results in a transition from diffusion- to advection-dominated transport. The current investigation suggests that flow-related crystallization must be considered to assess the intrinsic glass-formingability of BMGs produced via HPDC. The obtained results will not only improve the understanding ofcrystallization dynamics but also promote the high-quality production and large-scale application of BMGparts.

关键词： Crystallization Shear Supercooled liquid High pressure die casting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国女性孕期抑郁孕晚期发生率与影响因素

引用

中华预防医学杂志 2017年第2期51卷 149-149页

作者： Zeng Y Cui Y li j 张继不详北京大学公共卫生学流行病与卫生统计学系

采用横截面研究分析了中国人群中孕晚期的抑郁发生率与影响因素。本研究通过一间妇女儿童健康医院登记记录募集研究对象。测量量表包括中文版抑郁自评量表，艾森克人格问卷，社会支持评定量表和简化版应对策略问卷。292名研究对象中，... 详细信息

采用横截面研究分析了中国人群中孕晚期的抑郁发生率与影响因素。本研究通过一间妇女儿童健康医院登记记录募集研究对象。测量量表包括中文版抑郁自评量表，艾森克人格问卷，社会支持评定量表和简化版应对策略问卷。292名研究对象中，抑郁症状检出率为28．5％。

关键词：影响因素孕期抑郁发生率孕晚期中国女性社会支持评定量表艾森克人格问卷妇女儿童健康

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

增强乳腺X线摄影在乳腺导管原位癌术前检测中的作用：与低能量成像和MR成像的比较

引用

国际医学放射学杂志 2024年第4期 498-499页

作者： L.P.Wang P.Wang H.F.Shao j.li Q.L.Yang 高佳音

摘要目的比较对比增强乳腺X线摄影（CEM）与单独低能量成像（LEI）、CEM与MRI对乳腺导管原位癌（DCIS）的术前诊断价值。方法这项单中心回顾性研究分析了术前2

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

BMC Family Practice论文摘要汇编——大城市和乡村地区基层医疗机构进行AF-SMART心房颤动筛查项目的实施效果评估

引用

中国全科医学 2020年第8期23卷 979-979页

作者： ORCHARD j li j GALLAGHER R 本刊编辑部 Heart Research Institute/Charles Perkins Centre University of Sydney Sydney Australia Susan Wakil School of Nursing Faculty of Medicine and Health/Charles Perkins Centre University of Sydney Sydney Australia Edinburgh Napier University Edinburgh UK

背景国际指南建议对65岁及以上人群进行心房颤动筛查。本研究组于2016年11月—2019年6月在16个大城市和农村地区进行了机会性心房颤动筛查以进行心房颤动筛查、管理和指南推荐治疗研究(AF-SMART)。在这些研究中试用了定制的电子健康工... 详细信息

背景国际指南建议对65岁及以上人群进行心房颤动筛查。本研究组于2016年11月—2019年6月在16个大城市和农村地区进行了机会性心房颤动筛查以进行心房颤动筛查、管理和指南推荐治疗研究(AF-SMART)。在这些研究中试用了定制的电子健康工具支持各个阶段的心房颤动筛查。方法对AF-SMART项目的实施效果进行评价,并以此为依据决定是否需要扩大筛查人口比例。项目实施的最初理论是基于本研究组以前的研究结果、政策文件和其他相关筛查研究。在本研究中,本研究组对所选诊所的全科医生、护士和管理者进行了45场半结构式访谈。通过访谈收集了观察数据和定量数据,并进行分析和阐释以完善AF-SMART项目理论。结果全科医生和护士均喜欢使用这些电子健康工具,尽管有时候出现了技术性问题会使筛查过程中断。但是筛查耗时较久,因此筛查系统需要改进变得更加有效。由资深全科医生尤其是来自护理团队的资深全科医生领导的筛查小组的筛查范围更大。定期反馈筛查数据有助于提高筛查质量和激励筛查的进行。在分级诊疗过程中,筛查效果较好的以护士为主导的小组需要对筛查结果异常的人群制定明确的随访方案。参与实施AF-SMART项目能获得更多益处,比如增加对心房颤动的了解、更多了解心血管疾病预防范畴等。在诊所能有效安排职员工作时间的情况下,对目标人群进行短期集中筛查(工作模式类似在短期内集中接种流感疫苗)能获得较好的效果。结论当筛查小组由资深全科医生领导,有为异常筛查结果人群制定的随访方案并且筛查人群可定期向医务人员反馈随访数据的情况下,心房颤动筛查能够比较成功的实施。而这些与筛查成功相关的因素和激励机制、领导权、护士授权和有效的筛查系统相关。这些因素和机制有助于长期提高心房颤动筛查和治疗比例,被指南推荐为预防心房颤动相关脑卒中的关键策略。

关键词：全科医生基层医疗机构电子健康国际指南分级诊疗筛查结果心房颤动定量数据

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Precise genome-editing in human diseases:mechanisms,strategies and applications

引用

Signal Transduction and Targeted Therapy 2024年第3期9卷 1065-1085页

作者： Yanjiang Zheng Yifei li Kaiyu Zhou Tiange li Nathan j.VanDusen Yimin Hua Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE Department of PediatricsWest China Second University HospitalSichuan UniversityChengduSichuan 610041China Department of Cardiovascular Surgery West China HospitalSichuan UniversityChengduSichuan 610041China Department of Pediatrics Herman B Wells Center for Pediatric ResearchIndiana University School of MedicineIndianapolisIN 46202USA

Precise genome-editing platforms are versatile tools for generating specific,site-directed DNA insertions,deletions,and substitutions.The continuous enhancement of these tools has led to a revolution in the life sciences,which promises to deliver novel therapies for genetic disease.Precise genome-editing can be traced back to the 1950s with the discovery of DNA’s doublehelix and,after 70 years of development,has evolved from crude in vitro applications to a wide range of sophisticated capabilities,including in vivo applications.Nonetheless,precise genome-editing faces constraints such as modest efficiency,delivery challenges,and off-target effects.In this review,we explore precise genome-editing,with a focus on introduction of the landmark events in its history,various platforms,delivery systems,and applications.First,we discuss the landmark events in the history of precise genome-editing.Second,we describe the current state of precise genome-editing strategies and explain how these techniques offer unprecedented precision and versatility for modifying the human genome.Third,we introduce the current delivery systems used to deploy precise genome-editing components through DNA,RNA,and RNPs.Finally,we summarize the current applications of precise genome-editing in labeling endogenous genes,screening genetic variants,molecular recording,generating disease models,and gene therapy,including ex vivo therapy and in vivo therapy,and discuss potential future advances.

关键词： precise generating editing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Strengthening and deformation mechanism of high-strength CrMnFeCoNi high entropy alloy prepared by powder metallurgy

引用

journal of Materials Science & Technology 2023年第1期132卷 119-131页

作者： Y.Xing C.j.li Y.K.Mu Y.D.jia K.K.Song j.Tan G.Wang Z.Q.Zhang j.H.Yi j.Eckert Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghai 200444China School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Erich Schmid Institute of Materials Science Austrian Academy of SciencesJahnstraße 12Leoben A-8700Austria Department of Materials Science Chair of Materials PhysicsMontanuniversität LeobenJahnstraße 12Leoben A-8700Austria Adjunct with National University of Science and Technology«MISiS» Leninsky Prosp.4Moscow 119049Russia

Multiphase CrMnFeCoNi high-entropy alloys(HEAs)were prepared by a powder metallurgy process com-bining mechanical alloying(MA)and vacuum hot-pressing sintering(HPS).The single-phase face-centered cubic(FCC)HEA powder prepared by MA was sintered into a bulk HEA specimen containing FCC phase matrix along with precipitated M 23 C 6 phase and nanoscaleσphase particles.When the sintering temper-ature was 1223 K,the ultimate strength reaches 1300±11.6 MPa,and the elongation exceeds 4%±0.6%.Microstructural characterization reveals that the formation of nanoscale particles and deformation twins play critical roles in improving the strain hardening(SH)ability.Prolonging the MA time promoted the formation of the precipitated phase and enhanced the SH ability by increasing the number of precip-itated particles.The SH capacity increases significantly with increasing sintering temperature,which is attributed to a significant enhancement in the twinning capacity due to grain growth and the reduced number ofσphase particles.Through systematic studies,the planar glide of dislocations was found to be the main mode of deformation,while deformation twinning appeared as an auxiliary deformation mode when the twinning stress was reached.Although the formation of precipitates leads to grain bound-ary and precipitation strengthening effects,crack initiation is more prominent owing to increased grain boundary brittleness around the precipitated M 23 C 6 phase.The prominence of crack initiation is a contra-diction that must be reconciled with regard to precipitation strengthening.This work serves as a useful reference for the preparation of high-strength HEA parts by powder metallurgy.

关键词： High entropy alloy Powder processing Grain reﬁnement Precipitation strengthening Deformation twinning

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：