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Acta Mechanica Sinica 2020年第6期36卷 1294-1301,I0003页

作者： c.g.chai A.g.Pi q.M.Li F.L.Huang Institute of chemical Materials China Academy of Engineering PhysicsMianyang621900China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK

Similarity can reflect common laws in the mechanism of rigid-body *** this paper,the similarities in rigid-body penetration depth are demonstrated by three non-dimensional but physically meaningful quantities,i.e.,ρkinetic,I∗ln and N′*** three quantities represent the non-dimensional areal density of projectile kinetic energy,the effect of nose geometry,and the friction at the interactive cross section between projectile and target *** is shown that experimental data of rigid projectile penetration,from shallow to deep penetration,can be uniquely unified by these three similarity quantities and their ***,for ogival nose projectiles,their penetration capacities are dominated byρkinetic,which is consisted by non-dimensional effective length Leff and non-dimensional quantity Dpn=ρpv20AY which has the same form as Johnson’s damage *** the sacrifice of minor theoretical accuracy,the non-dimensional penetration depth P/d can be understood as directly controlled by Dpn,enhanced by projectile effective length Leff under a multiplication relation,and optimized by projectile nose geometry in the formation of I∗ln.

关键词： concrete target Deep penetration Similarity-Johnson's damage number

由超拍电子伏特加速器产生的超高能伽马射线气泡

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Science Bulletin 2024年第4期69卷 449-457页

作者： LHAASO collaboration Zhen cao chuandong gao cong Li Ruo-Yu Liu Ruizhi Yang 不详 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 ChengduChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China University of Science and Technology of china Hefei 230026China

We report the detection of aγ-ray bubble spanning at least 100deg2 in ultra-high energy(UHE)up to a few PeV in the direction of the star-forming region cygnus X,implying the presence super PeVatron(s)accelerating protons to at least 10 PeV.A log-parabola form with the photon indexΓ(E)=(2.71±0.02)+(0.11±0.02)×log10(E/10 TeV)is found fitting the gamma-ray energy spectrum of the bubble *** sources,“hot spots”correlated with very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter with a sharp central brightening are observed in the *** the core of~0.5°,spatially associating with a region containing massive OB association(cygnus OB2)and a microquasar(cygnus X-3),as well as previously reported multi-TeV sources,an enhanced concentration of UHEγ-rays is observed with 2 photons at energies above 1 *** general feature of the bubble,the morphology,and the energy spectrum,are reasonably reproduced by the assumption of a particle accelerator in the core,continuously injecting protons into the ambient medium.

关键词： cosmic rays γ-rays Interstellar medium Star cluster

基于MRI的自动化多任务深度学习系统评估冈上肌腱损伤

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国际医学放射学杂志 2024年第4期 499-500页

作者： M.Ni Y.q.Zhao L.H.Zhang W.chen q.Z.Wang c.Y.Tian 常雪

摘要目的建立一个自动化、多任务、基于MRI的深度学习系统，用于精细评估冈上肌腱（SST）损伤。方法根据关节镜检查结果，将3 087例病人分为SST正常组、退变组和

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Measurement and Prediction of Insertion Force for the Mosquito Fascicle Penetrating into Human Skin

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Journal of Bionic Engineering 2009年第2期6卷 143-152页

作者： X q Kong c W Wu State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsDalian University of Technology

Mosquitoes are exceptional in their ability to pierce into human skin with a natural ultimate painless microneedle, named fascicle. Here the structure of the Aedes albopictus mosquito fascicle is obtained using a Scanning Electron Microscope (SEM), and the whole process of the fascicle inserting into human skin is observed using a high-speed video imaging technique. Direct measurements of the insertion force for mosquito fascicle to penetrate into human skin are reported. Results show that the mosquito uses a very low force (average 18 μN) to penetrate into the skin. This force is at least three orders of magnitude smaller than the reported lowest insertion force for an artificial microneedle with an ultra sharp tip to insert into the human skin. In order to understand the piercing mechanism of mosquito fascicle tip into human multilayer skin tissue, a numerical simulation is conducted to analyze the insertion process using a nonlinear finite element method. A good agreement occurs between the numerical results and the experimental measurements.

关键词： biomimetic microneedle mosquito fascicle mechanics penetration

Further investigation on the fusion of ^(6)Li with ^(209)Bi target at near-barrier energies

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chinese Physics c 2024年第7期48卷 106-117页

作者：张高龙焦振威张广鑫 M.R.cortes 胡世鹏钱建强 D.Mengoni 屈卫卫李聪博郑云张焕乔孙慧斌王楠张春雷 J.J.Valiente-Dobón D.Testov M.Mazzocco A.gozzelino c.Parascandolo D.Pierroutsakou M.La commara A.goasduff D.Bazzacco D.R.Napoli F.galtarossa F.Recchia A.Illana S.Bakes I.Zanon S.Aydin g.de Angelis M.Siciliano R.Menegazzo S.M.Lenzi J.L.Ferreira J.Rangel Serkan Akkoyun L.F.canto J.Lubian School of Physics Beihang UniversityBeijing 100191China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de Física Universidade Federal Fluminense24210-340NiteróiRio de JaneiroBrazil Institute for Advanced Study in Nuclear Energy&Safety Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Research and Manufacture of High Purity germanium Materials and Fetectors Shenzhen UniversityShenzhen 518060China INFN Sezione di PadovaPadovaItaly Dipartimento di fisica Astronomia dell'Universita di padova PadovaItaly State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China china Institute of Atomic Energy Beijing 102413China The Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China INFN Laboratori Nazionali di LegnaroI-35020 LegnaroItaly INFN Sezione di NapoliI-80126 NapoliItaly Dipartimento di Farmacia Universitàdi Napoli"Federico II"I-80131 NapoliItaly Department of Natural and Mathematical Sciences Faculty of EngineeringTarsus University33480 MersinTurkiye Physics Division Argonne National LaboratoryLemont-ILUSA Departamento de Matemaética Física e Computaç˜ao Universidade do Estado do Rio de JaneiroFaculdade de Tecnologia27537-000ResendeRio de JaneiroBrazil Department of Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de Física Universidade Federal do Rio de JaneiroCP 6852821941-972Rio de JaneiroBrazil

The complete and incomplete fusion cross sections for ^(6)Li+^(209)Bi were measured using the in-beamγ-ray method around the coulomb *** cross sections of(deuteron captured)incomplete fusion(IcF)products were re-quantified experimentally for this reaction *** results reveal that the IcF cross section is equivalent to that of complete fusion(cF)above the coulomb barrier and dominant near or below the coulomb barrier.A theoretical calculation based on the continuum discretized coupled channel(cDcc)method was performed for the aforementioned cF and IcF cross sections;the result is consistent with the *** universal fusion function(UFF)was also compared with the measured cF cross section for different barrier parameters,demonstrating that the cF suppression factor is significantly influenced by the choice of potential,which can reflect both dynamic and static effects of breakup on the fusion process.

关键词： cross section incomplete fusion suppression factor weakly bound nuclei

联合InSAR和gNSS构建青藏高原千米分辨率三维地壳形变场

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中国科学：地球科学 2024年第6期54卷 1845-1862页

作者：刘传金季灵运朱良玉许才军赵超英 Zhong LU 王庆良武汉大学测绘学院武汉430079 中国地震局第二监测中心西安710054 长安大学地质工程与测绘学院西安710054 Roy M.Huffington Department of Earth Sciences Southern Methodist UniversityDallasTX 75025USA

青藏高原位于印度板块与欧亚板块碰撞的前沿地带,地壳运动十分活跃.受高海拔、高寒气候等因素的限制,以地面观测站为代表的传统大地测量监测较为困难,因此至今青藏高原的高空间分辨率地壳形变场尚未精确测定. InSAR技术不受地面观测条... 详细信息

青藏高原位于印度板块与欧亚板块碰撞的前沿地带,地壳运动十分活跃.受高海拔、高寒气候等因素的限制,以地面观测站为代表的传统大地测量监测较为困难,因此至今青藏高原的高空间分辨率地壳形变场尚未精确测定. InSAR技术不受地面观测条件限制,能够获得大范围、高空间分辨率的地壳形变场,在青藏高原地壳形变监测领域具有不可替代的优势.本文利用2014~2020年的Sentinel-1卫星SAR数据,计算了青藏高原升降轨InSAR形变场,测量精度约为3mm/a.在此基础上,融合InSAR与gNSS数据,获取了覆盖青藏高原的千米分辨率三维地壳形变场和应变率场.通过球面小波多尺度分析,将三维形变场分解出不同波长的形变,其中波长小于110km的形变主要来自断层运动、震后形变和其他非构造形变,大于110km的形变主要来自大范围的构造运动.研究结果显示,高原中部地区呈现大范围下沉,而喜马拉雅弧地区则呈现明显隆升,这表明青藏高原可能已经停止了整体隆升并进入了局部坍塌阶段.此外,不同空间尺度的三维形变场表明,青藏高原在短波长变形中表现为非连续形变,在长波长中则表现为连续形变.本文研究结果有助于调节青藏高原块体变形模型和连续变形模型之间的争议.

关键词：青藏高原 InSAR gNSS 三维形变形变模型

Using SPOT 5 fusion-ready imagery to detect chinese tamarisk(saltcedar)with mathematical morphological method

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International Journal of Digital Earth 2014年第3期7卷 217-228页

作者： q.S.Liu g.H.Liu c.Huang c.J.Xie State Key Laboratory of Resources and Environmental Information System Institute of Geographic Science and Natural Resources ResearchChinese Academy of SciencesBeijingChina

chinese tamarisk(saltcedar)is a deciduous shrub that occurs widely across the Yellow River Delta in *** spatial structure of chinese tamarisk is believed to have an influence on the landscape and habitats of rare *** this study,first,chinese tamarisk is detected using canny edge detector and mathematical morphological operators based on SPOT 5 fusion-ready *** the numbers,areas,locations,and patch spacing of chinese tamarisk patches are *** experiments show that the detection accuracy of chinese tamarisk patches is about 93.4%after the disconnection of connected *** distribution orientation of about 70%of the patches is approximately *** 91%of the minimum distances among the patches are between 12.5 and 57.5 *** rose graph indicates that the main azimuth between patches is north--northwest,and the second is northeast and *** present study indicates that the integrating canny edge detector with the algorithms for extracting circular and elliptical objects based on mathematical morphology is simple and effective for detecting chinese tamarisk patches and is easy to identify the spatial structure of chinese tamarisk patches,which reduces the time and labor for the visual interpretation of chinese tamarisk patches.

关键词： SPOT 5 chinese tamarisk spatial structure mathematical morphology patch

Evidence for particle acceleration approaching PeV energies in the W51 complex

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Science Bulletin 2024年第18期69卷 2833-2841页

作者： LHAASO collaboration Zhen cao F.Aharonian Axikegu Y.X.Bai Y.W.Bao D.Bastieri X.J.Bi Y.J.Bi W.Bian A.V.Bukevich q.cao W.Y.cao Zhe cao J.chang J.F.chang A.M.chen E.S.chen H.X.chen Liang chen Lin chen Long chen M.J.chen M.L.chen q.H.chen S.chen S.H.chen S.Z.chen T.L.chen Y.chen N.cheng Y.D.cheng M.Y.cui S.W.cui X.H.cui Y.D.cui B.Z.Dai H.L.Dai Z.g.Dai Danzengluobu X.q.Dong K.K.Duan J.H.Fan Y.Z.Fan J.Fang J.H.Fang K.Fang c.F.Feng H.Feng L.Feng S.H.Feng X.T.Feng Y.Feng Y.L.Feng S.gabici B.gao c.D.gao q.gao W.gao W.K.gao M.M.ge L.S.geng g.giacinti g.H.gong q.B.gou M.H.gu F.L.guo X.L.guo Y.q.guo Y.Y.guo Y.A.Han M.Hasan H.H.He H.N.He J.Y.He Y.He Y.K.Hor B.W.Hou c.Hou X.Hou H.B.Hu q.Hu S.c.Hu D.H.Huang T.q.Huang W.J.Huang X.T.Huang X.Y.Huang Y.Huang X.L.Ji H.Y.Jia K.Jia K.Jiang X.W.Jiang Z.J.Jiang M.Jin M.M.Kang I.Karpikov D.Kuleshov K.Kurinov B.B.Li c.M.Li cheng Li cong Li D.Li F.Li H.B.Li H.c.Li Jian Li Jie Li K.Li S.D.Li W.L.Li W.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.W.Liang Y.F.Liang S.J.Lin B.Liu c.Liu D.Liu D.B.Liu H.Liu H.D.Liu J.Liu J.L.Liu M.Y.Liu R.Y.Liu S.M.Liu W.Liu Y.Liu Y.N.Liu q.Luo Y.Luo H.K.Lv B.q.Ma L.L.Ma X.H.Ma J.R.Mao Z.Min W.Mitthumsiri H.J.Mu Y.c.Nan A.Neronov L.J.Ou P.Pattarakijwanich Z.Y.Pei J.c.qi M.Y.qi B.q.qiao J.J.qin A.Raza D.Ruffolo A.Sáiz M.Saeed D.Semikoz L.Shao O.Shchegolev X.D.Sheng F.W.Shu H.c.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.Sun q.N.Sun X.N.Sun Z.B.Sun J.Takata P.H.T.Tam q.W.Tang R.Tang Z.B.Tang W.W.Tian c.Wang c.B.Wang g.W.Wang H.g.Wang H.H.Wang J.c.Wang Kai Wang Kai Wang L.P.Wang L.Y.Wang P.H.Wang R.Wang W.Wang X.g.Wang X.Y.Wang Y.Wang Y.D.Wang Y.J.Wang Z.H.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei J.J.Wei Y.J.Wei T.Wen c.Y.Wu H.R.Wu q.W.Wu S.Wu X.F.Wu Y.S.Wu S.q.Xi J.Xia g.M.Xiang D.X.Xiao g.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.Xu R.F.Xu R.X.Xu W.L.Xu L.Xue D.H.Yan J.Z.Yan T.Yan c.W.Yang c.Y.Yang F.Yang F.F.Yang L.L.Yang M.J.Yang R.Z.Yang W.X.Yang Y.H.Yao Z.g.Yao L.q.Yin N.Yin X.H.You Z.Y.You Y.H.Yu q.Yuan H.Yue H.D.Zeng T.X.Zeng W.Zeng M.Zha B.B.Zhang F.Zhang H.Zhang 不详 Key Laboratory of Particle Astrophysics&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 ChengduChina Dublin Institute for Advanced Studies 31 Fitzwilliam Place2 DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 103980Heidelberg 69029Germany 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 Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Institute for Nuclear Research of Russian Academy of Sciences Moscow 117312Russia Hebei Normal University Shijiazhuang 050024China University of Science and Technology of china Hefei 230026China State Key Laboratory of Particle Detection and Electronics China Key Laboratory of Dark Matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research center for Astronomical computing Zhejiang LaboratoryHangzhou 311121China Key Laboratory for Research in galaxies and cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School of Physics and Astronomy Yunnan UniversityKunming 650091China Key Laboratory of cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China 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 510275GuangdongChina Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China APc UniversitéParis Cité

Theγ-ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays(cRs)accelerated by the shock of supernova remnant(SNR)W51c and the dense molecular clouds in the adjacent star-forming region,***,the maximum acceleration capability of W51c for cRs remains *** on observations conducted with the Large High Altitude Air Shower Observatory(LHAASO),we report a significant detection ofγrays emanating from the W51 complex,with energies from 2 to 200 *** LHAASO measurements,for the first time,extend theγ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of *** combining the"π^(0)-decay bump"featured data from Fermi-LAT,the broadbandγ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision *** observed spectral bending feature suggests an exponential cutoff at~400 TeV or a power-law break at~200 TeV in the cR proton spectrum,most likely providing the first evidence of SNRs serving as cR accelerators approaching the PeV ***,two young star clusters within W51B could also be theoretically viable to produce the most energeticγrays observed by *** findings strongly support the presence of extreme cR accelerators within the W51 complex and provide new insights into the origin of galactic cRs.

关键词： UHE c-ray cosmic rays SNR W51c Star clusters

Experimental Study and Numerical Simulation of the casting-Forging complex Near Net Forming of Alternator claw-pole

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上海交通大学学报 2004年第Z2期38卷 79-82页

作者： J.L.Song D.J.Hu q.c.Wang H.q.chen H.g.guo School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai200030 China Scool of Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan030024 China School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai200030 China Scool of Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan030024 China Scool of Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan030024 China Scool of Materials Science and Engineering Taiyuan Heavy Machinery Institute Taiyuan030024 China

As a newly developed precision technology, casting-forging complex near net forming process is utilized to produce complex components with a short lead time, low cost and high precision, thus to accelerate the response speed of the market and enhance the competitive power of products. In this paper, the casting-forging complex near net forming process of alternator claw pole was developed and investigated with a combination of experimental and numerical simulation method. qualified near net workpiece was manufactured, mechanical parameter and relative field information during the forming process was also obtained. While the alternator claw-pole is processed with this technology, the forming force is small, the process is short and the quality of forgings is perfect. Therefore, the complex casting-forging near net forming process of claw-pole is an energy and material saving technology, which will have a vast developing and application prospect in the future.

关键词： alternator claw-pole casting-forging near net forming numerical simulation