检索结果-南通市图书馆

The Tianlai Cylinder Pathfinder array: System functions and basic performance analysis

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2020年第12期63卷 2-28页

作者： JiXia li ShiFan Zuo FengQuan Wu YouGang Wang JuYong Zhang ShiJie Sun Yidong Xu ZiJie Yu Reza Ansari YiChao li Albert Stebbins Peter Timbie YanPing Cong JingChao Geng Jie Hao QiZhi Huang JianBin li Rui li dongHao {2. YingFeng {2. Tao {2. John PMarriner ChenHui Niu Ue-li Pen Jeffery BPeterson Huli Shi lin Shu YaFang Song HaiJun Tian GuiSong Wang QunXiong Wang Rongli Wang weiXia Wang Xin Wang KaiFeng Yu Jiao Zhang BoQin zhu JiaLu zhu XueLei Chen national Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Center for Astrophysics and Department of Astronomy Tsinghua UniversityBeijing 100084China School of mechanical engineering Hangzhou Dianzi UniversityHangzhou 310018China IJC Lab CNRS/IN2P3&UniversitéParis-SaclayOrsay 91405France Department of Physics and Astronomy University of the Western CapeBelville 7535Republic of South Africa Fermi national Accelerator Laboratory Batavia IL 60510-5011USA Department of Physics University of Wisconsin MadisonMadison WI 53703USA The 54th Research Institute China Electronics Technology Group CorporationShijiazhuang 050051China Institute of Automation Chinese Academy of SciencesBeijing 100190China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830001China Canadian Institute for Theoretical Astrophysics University of TorontoToronto M5S 3H8Canada Department of Physics Carnegie Mellon UniversityPittsburgh PA 15213USA Center for Astronomy and Space Sciences China Three Gorges UniversityYichang 443002China School of Physics and Astronomy Sun Yat-sen UniversityGuangzhou 510297China college of Physics and electronic {2. Shanxi UniversityTaiyuan 030006China Center of High Energy Physics Peking UniversityBeijing 100871China

The Tianlai Cylinder Pathfinder is a radio interferometer array designed to test techniques for 2. cm intensity mapping in the post-reionization Universe,with the ultimate aim of mapping the large scale structure and measuring cosmological parameters such as the dark energy equation of *** of its three parallel cylinder reflectors is oriented in the north-south direction,and the array has a large field of *** the Earth rotates,the northern sky is observed by drift *** array is located in Hongliuxia,a radio-quiet site in Xinjiang,and saw its first light in September *** this first data analysis paper for the Tianlai cylinder array,we discuss the sub-system qualification tests,and present basic system performance obtained from preliminary analysis of the commissioning observations during *** show typical interferometric visibility data,from which we derive the actual beam profile in the east-west direction and the frequency band-pass *** describe also the calibration process to determine the complex gains for the array elements,either using bright astronomical point sources,or an artificial on site calibrator source,and discuss the instrument response stability,crucial for transit *** on this analysis,we find a system temperature of about 90 K,and we also estimate the sensitivity of the array.

关键词： interferometer radio astronomy neutral hydrogen cosmology dark energy

在线全文

学校读者我要写书评

暂无评论

双叶片套型电解加工流场设计及优化

机械工程学报 2022年第21期58卷 306-315页

作者：张晓博朱栋李正寅焦尔豪侯镇浩南京航空航天大学机电学院南京210016

具有大小双叶片的扩压器能够改善压气机的性能,在航空发动机中得到广泛应用。此类构件多采用高温合金等难切削材料制造,传统铣削加工存在刀具损耗等问题。电解加工技术具有无机械切削力、工具阴极无损耗等特点。提出一种双叶片套型电解... 详细信息

具有大小双叶片的扩压器能够改善压气机的性能,在航空发动机中得到广泛应用。此类构件多采用高温合金等难切削材料制造,传统铣削加工存在刀具损耗等问题。电解加工技术具有无机械切削力、工具阴极无损耗等特点。提出一种双叶片套型电解加工的方法,基于法向流程等距的原则设计了叶间出液通道,建立了出液通道宽度递增的流道模型,开展了流场仿真研究,当出液通道的宽度为0.9 mm时,加工区域内电解液的流速分布最均匀。选择GH4169材料进行了双叶片套型电解加工的对比试验,试验结果表明,采用叶间出液的电解液流动方式,加工稳定性得到提高,阴极进给速度由0.6 mm/min提高至1.0 mm/min,材料去除速率达到1396.5 mm3/min,叶片锥度降低至1:14.2.以下,轮毂表面形貌得到改善。

关键词：扩压器套型电解加工电解液流动方式流场仿真材料去除速率

Ca_(1−x)li_(x)Al_(1−x)Si_(1+x)N_(3):Eu^(2.) solid solutions as broadband,color-tunable and thermally robust red phosphors for superior color rendition white light-emitting diodes

在线全文

学校读者我要写书评

暂无评论

light(Science & Applications) 2016年第1期5卷 465-473页

作者： Le Wang Rong-Jun Xie Yuanqiang li Xiaojun Wang Chong-Geng Ma dong Luo Takashi Takeda Yi-Ting Tsai Ru-Shi liu Naoto Hirosaki college of Optics and electronic Science and Technology China Jiliang UniversityHangzhouZhejiang 310018China college of Materials Xiamen UniversityXiamenFujian 361005China Sialon Group National Institute for Materials Science(NIMS)TsukubaIbaraki 305-0044Japan Intematix Corporation FremontCA 94538USA college of Sciences Chongqing University of Posts and TelecommunicationsChongqing 400065China Department of Chemistry Taiwan University Department of mechanical engineering and Graduate Institute of Manufacturing Technology Taipei University of Technology

Color rendition,luminous efficacy and reliability are three key technical parameters for white light-emitting diodes(wLEDs)that are dominantly determined by down-conversion ***,there is usually an inevitable trade-off between color rendition and luminescence efficacy because the spectrum of red phosphor(that is,spectral broadness and position)cannot satisfy them *** this work,we report a very promising red phosphor that can minimize the aforementioned trade-off via structure and band-gap engineering,achieved by introducing isostructural liSi_(2.N_(3) into CaAlSiN_(3):Eu^(2.).The solid solution phosphors show both substantial spectra broadening(88→117 nm)and blueshift(652.642.nm),along with a significant improvement in thermal quenching(only a 6%reduction at 150℃),which are strongly associated with electronic and crystal structure *** broadband and robust red phosphor thus enables fabrication of super-high color rendering wLEDs(Ra=95 and R9=96)concurrently with the maintenance of a high-luminous efficacy(101 lm W^(−1)),validating its superiority in highperformance solid state lightings over currently used red phosphors.

关键词： color rendering LEDs nitride phosphor structure disorder

氧化石墨烯/金属有机框架材料复合膜在有机废水处理中的研究进展

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

材料导报 2020年第7期34卷 3-9页

作者：刘宇程祝梦陈明燕涂雯雯甘冬西南石油大学化学化工学院成都610500 西南石油大学工业危废处置与资源化利用研究院成都610500

石墨烯因力学特性、电子效应、光学特性、热性能以及其他化学性质而受到人们的广泛关注,其氧化产物——氧化石墨烯兼具以上优良性能,还含有丰富的羟基、羧基等含氧基团。氧化石墨烯是一种二维材料,具有独特的原子厚度和微米横向尺寸、... 详细信息

石墨烯因力学特性、电子效应、光学特性、热性能以及其他化学性质而受到人们的广泛关注,其氧化产物——氧化石墨烯兼具以上优良性能,还含有丰富的羟基、羧基等含氧基团。氧化石墨烯是一种二维材料,具有独特的原子厚度和微米横向尺寸、优异的机械强度、较大的表面积和较强的亲水性,在水处理方面具有广阔的应用前景。近年来,关于氧化石墨烯复合膜的制备方法与应用研究取得了较大进展,但是针对有机废水的处理,复合膜的不稳定性阻碍了其发展。氧化石墨烯膜对有机物有较好的去除效果,但通量较低、稳定性差、抗污性较差的缺点越来越突出。氧化石墨烯的层间距限制了其在水处理中的应用。因此,除研究影响氧化石墨烯膜处理效果的因素外,研究者们还将具有多孔结构的金属有机框架材料与氧化石墨烯结合制备复合膜,并取得了一定的成果。目前,氧化石墨烯/金属有机框架材料复合膜对有机染料亚甲基蓝和刚果红等的去除率可达99%,较氧化石墨烯纯膜的去除率提高约55%。在复合膜处理有机废水的研究中,氧化石墨烯/铜基(HKUST-1)复合膜、氧化石墨烯/锆基(UiO-66)复合膜、氧化石墨烯/锌基(ZIF-8)复合膜等已取得较好的研究成果。其中铜基金属有机框架材料与氧化石墨烯制备的复合膜应用较多,已被广泛用于有机废水、含油废水的处理以及气体分离领域。金属有机框架材料的加入,可有效增大氧化石墨烯的层间距,提高复合膜的亲水性,为水分子通过复合膜提供了有效的通道和推动力,从而提升复合膜的通量和去污性能。本文介绍了国内外氧化石墨烯/金属有机框架材料复合膜的研究与应用,重点论述其在难降解有机物、有机染料废水处理中的研究进展,并对复合膜去除有机物的机理进行探讨。此外,对氧化石墨烯/金属有机框架材料复合膜的发展前景进行展望,在涵盖两种优良吸附剂特性的基础上,随着研究的不断深入,高通量、高去除率、高抗污性能的复合膜将会在更多领域得到应用。

关键词：氧化石墨烯金属有机框架材料复合膜有机废水

Fully relativistic many-body perturbation energies,transition properties,and lifetimes of lithium-like iron Fe XXIV

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2023年第10期32卷 90-99页

作者：李双赵敏刘国庆胡昌宝潘国柱 School of Electrical and Opto-electronic engineering West Anhui UniversityLu'an 237012China college of mechanical and {2. engineering Fujian Agriculture and Forestry UniversityFuzhou 350002China Institute of Applied Physics and Computational Mathematics Beijing 100088China Shanghai EBIT Laboratory Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghai 200433China

Employing the advanced relativistic configuration interaction(RCI)combined with the many-body perturbation theory(RMBPT)method,we report energies and lifetime values for the lowest 35 energy levels from the(1s^(2.)nl configurations(where the principal quantum number n=2.6 and the angular quantum number l=0,...,n-1)of lithium-like iron Fe XXIV,as well as complete data on the transition wavelengths,radiative rates,absorption oscillator strengths,and line strengths between the *** the allowed(E1)and forbidden(magnetic dipole M1,magnetic quadrupole M2.and electric quadrupole E2.ones are *** detailed comparisons with previous results,we assess the overall accuracies of present RMBPT results to be likely the most precise ones to *** interaction effects are found to be very important for the energies and radiative properties for the *** present RMBPT results are valuable for spectral line identification,plasma modeling,and diagnosing.

关键词： relativistic many-body perturbation multi-reference configuration radiative rates lifetime

Sub-percent precision measurement of neutrino oscillation parameters with JUNO

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan Chang Yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen Yu Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng Yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist heike Enzmann Andrea Fabbri donghua Fan Lei Fan Jian Fang Wenxing Fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei li-Cheng Feng Qichun Feng Richard Ford Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan Nunzio Guardone Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao he wei he Tobias heinz Patrick hellmuth Yuekun heng Rafael herrera YuenKeung Ho Yerevan Physics Institute YerevanArmenia Universiélibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment engineering BeijingChina Beijing Normal university BeijingChina china Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North china Electric Power university BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua university BeijingChina university of Chinese Academy of Sciences BeijingChina Jilin university ChangchunChina college of electronic Science and {2. National University of Defense TechnologyChangshaChina Chongqing university ChongqingChina dongguan university of Technology DongguanChina Jinan university GuangzhouChina Sun Yat-Sen university GuangzhouChina Harbin Institute of Technology HarbinChina university of Science and Technology of china HefeiChina The Radiochemistry and Nuclear Chemistry Group in university of South china HengyangChina Wuyi university JiangmenChina Shandong university JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing university NanjingChina Guangxi university NanningChina East china university of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai university TianjinChina Wuhan university WuhanChina Xi'an Jiaotong university Xi'anChina Xiamen university XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUNO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_(31)^(2.,△m_(2.)^(2.,sin^(2.θ_(12.,and sin^(2.θ_(13) oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satellite *** is found that the △m_(2.)^(2. and sin^(2.θ_(12. oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(31)^(2. parameter will be determined to about 0.2.precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUNO

在线全文

学校读者我要写书评

暂无评论

排土场土体裂缝特征对土壤物理性质的影响

干旱地区农业研究 2022年第4期40卷 214-222页

作者：李叶鑫吕刚王道涵王双刘爽朱肃沈阳工业大学建筑与土木工程学院辽宁沈阳110870 辽宁工程技术大学环境科学与工程学院辽宁阜新123000 铁岭县自然资源事务服务中心辽宁铁岭112600 铁岭市自然资源事务服务中心辽宁铁岭112000

以内蒙古胜利东二号露天煤矿南排土场为研究对象,研究排土场不同土体裂缝区土壤机械组成、孔隙状况、水分空间分布以及饱和导水率的特征和差异。结果表明:3个样地土壤机械组成以砂粒为主,土壤质地为砂质土壤,具有质地疏松、通气透水能... 详细信息

以内蒙古胜利东二号露天煤矿南排土场为研究对象,研究排土场不同土体裂缝区土壤机械组成、孔隙状况、水分空间分布以及饱和导水率的特征和差异。结果表明:3个样地土壤机械组成以砂粒为主,土壤质地为砂质土壤,具有质地疏松、通气透水能力强、蓄水能力差等特点;3个样地土壤容重为1.2.0}.45 g·cm^(-3),且随着土层深度的增加先增大后减小;3个样地土壤含水率偏低,且随着土层深度的增加而减小;土壤饱和含水量、田间持水量和土壤有效水含量呈先减小后增大的变化规律,凋萎系数呈先增大后减小的变化规律,且不同土层之间存在差异。随着土层深度的增加,3个样地各个土层(0~10、10~2.、2.~30、30~40、40~50、50~60 cm)土壤饱和导水率平均值依次为1.16、1.02.0.95、0.71、0.47、0.2. mm·min-1;土壤饱和导水率与土层深度之间具有较好的幂函数关系。土体裂缝的出现改变土壤容重、孔隙状况和土壤水分空间分布等土壤物理性质,进而影响排土场水分入渗、地表径流及产流产沙等水土流失过程。

关键词：排土场土壤水分土体裂缝土壤机械组成土壤孔隙状况饱和导水率

3D打印个性化支具与铰链式支具治疗内侧副韧带损伤的疗效对比研究

在线全文

学校读者我要写书评

暂无评论

创伤外科杂志 2022年第8期24卷 619-624,629页

作者：李家豪刘森师铂张永弟朱超华贾国兴董威河北医科大学第一医院骨科石家庄050031 河北科技大学机械工程学院石家庄050018

目的比较3D打印个性化支具与铰链式支具治疗内侧副韧带损伤的临床疗效。方法前瞻性分析2.2.年1月—2.2.年7月于河北医科大学第一医院骨科就诊的运动性内侧副韧带损伤(核磁共振显示Ⅰ度或Ⅱ度损伤)患者共60例,男性2.例,女性31例;年龄13~5... 详细信息

目的比较3D打印个性化支具与铰链式支具治疗内侧副韧带损伤的临床疗效。方法前瞻性分析2.2.年1月—2.2.年7月于河北医科大学第一医院骨科就诊的运动性内侧副韧带损伤(核磁共振显示Ⅰ度或Ⅱ度损伤)患者共60例,男性2.例,女性31例;年龄13~58岁,平均35.7岁。采用随机数字表法分为两组:3D打印支具组(n=30)和铰链式支具组(n=30)。铰链式支具组患膝佩戴同一品牌膝关节铰链式支具,3D打印支具组佩戴3D打印个性化支具。治疗周期为2.,记录并比较两组治疗前与治疗2.后步态分析仪测量下的膝关节最大外翻角度、患肢步态周期、患肢支撑期和行走时屈伸范围,ligs关节韧带数字检查仪测量下80、12.、150N外翻应力下胫骨相对位移距离,国际膝关节文献委员会(IKDC)评分和满意度。结果治疗后,两组膝关节最大外翻角度、行走时屈伸范围、患肢步态周期、患肢支撑期比较差异无统计学意义(P>0.05)。两组组内治疗前后比较,行走时屈伸范围差异有统计学意义(P12.、150N外翻应力下3D打印支具组与铰链式支具组患者胫骨相对位移距离差异均无统计学意义(P>0.05),两组IKDC评分比较差异无统计学意义(P>0.05)。3D打印支具组患者满意率较铰链式支具组升高(P<0.05)。结论3D打印个性化支具与铰链式支具治疗内侧副韧带损伤的临床效果相当,但3D打印个性化支具佩戴更加舒适便捷,患者对于佩戴3D个性化打印支具有较高的满意度。

关键词：韧带损伤 3D打印支具步态分析膝关节功能满意度

在线全文

学校读者我要写书评

暂无评论

二维材料最新研究进展

物理化学学报 2021年第12期37卷 1-151页

作者：常诚陈伟陈也陈永华陈雨丁峰樊春海范红金范战西龚成宫勇吉何其远洪勋胡晟胡伟达黄维黄元季威李德慧李连忠李强林立凌崇益刘鸣华刘楠刘庄 Kian Ping Loh 马建民缪峰彭海琳邵明飞宋礼苏邵孙硕谭超良唐智勇王定胜王欢王金兰王欣王欣然 Andrew T.S.Wee 魏钟鸣吴宇恩吴忠帅熊杰熊启华徐伟高尹鹏曾海波曾志远翟天佑张晗张辉张其春张铁锐张翔赵立东赵美廷赵伟杰赵运宣周凯歌周兴周喻朱宏伟张华刘忠范 Institute of Science and Technology Austria Am Campus 13400 KlosterneuburgAustria Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore Department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong KongChina Key Laboratory of Flexible electronics and Institute of Advanced Materials Nanjing Tech UniversityNanjing 211816China School of life Sciences Shanghai UniversityShanghai 200444China Centre for Multidimensional Carbon Materials Institute for Basic ScienceUlsan 44919Korea School of Chemistry and Chemical engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore Department of Chemistry City University of Hong KongKowloonHong KongChina Department of Electrical and Computer engineering and Quantum Technology Center University of MarylandCollege ParkMaryland 20742USA School of Materials Science and engineering Beihang UniversityBeijing 100191China Department of Materials Science and engineering City University of Hong KongKowloonHong KongChina Center of Advanced Nanocatalysis(CAN) Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China college of Chemistry and Chemical engineering State Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materials(iChEM)Xiamen UniversityXiamen361005Fujian ProvinceChina State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano Devices Department of PhysicsRenmin University of ChinaBeijing 100872China School of Optical and electronic Information Wuhan National Laboratory

Research on two-dimensional(2.) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the {2. exfoliation of graphene in 2.04. Starting from graphene, 2. materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2. materials make them one class of the most appealing candidates for a wide range of potential applications. In particular, we have seen some major breakthroughs made in the field of 2. materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2. materials with a particular focus on last five years. After a brief backgroundintroduction, we first discuss the major synthetic methods for 2. materials, including the {2. exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2. materials belonging to the field of phase engineering of nanomaterials(PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2. materials along with newly emerging magic angle 2. superlattices. Following that, the promising applications of 2. materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2. materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

关键词： Two-dimensional materials Transition metal dichalcogenides Phase engineering of nanomaterials electronics Optoelectronics Catalysis Energy storage and conversion