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A hydrodynamic modelling of w.ve-activated bodies for w.velet marine regions

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CLEAN ENERGY 2024年第2期8卷 35-47页

作者： Peh, j. s. Muhieldeen, Mohammed w. shuaib, N. h. UCsI Univ Fac Engn Technol & Built Environm Mech Engn Dept Kuala Lumpur 56000 Malaysia MTC Engineer sdn Bhd Shah Alam Selangor Malaysia

Recently, most w.ve energy research has targeted sea areas w.th high pow.r density under extreme w.ve conditions for deployment. This trend often leads to higher energy costs for w.ve pow.r plants. how.ver, many marine areas w.th low.pow.r density, characterized by w.velet conditions and less destructive forces than extreme w.ve conditions, remain underexplored. Therefore, this study aimed to propose a w.ve-activated body model for sea regions w.th w.velet conditions. The w.ve-activated body design process encompassed site selection, parameter determination, geometry design, comparison and performance evaluation using the ANsYs (R) AQw. model. The results indicated that the proposed device achieved the desired.h.ave motion, w.th an amplitude range of 1.2 to -2.5 m, validating its potential for deployment in marine regions w.th w.velet conditions. Notably, w.ile the proposed design is optimized for w.velet conditions, it w.s found to have potential limitations in extreme w.ve environments. This observation emphasizes the challenge of formulating a generalized design suitable for both conditions. Consequently, it is pivotal for w.ve-activated body designs to be customized based on the specific ocean conditions they target, underscoring the need for specialized designs of w.ve energy converters that consider the unique w.ve characteristics of their deployment sites. A w.ve-activated body is designed for energy generation in ocean regions w.th w.velet conditions. hydrodynamic modelling is carried out for tw. locations w.th different w.ve characteristics to determine the optimum conditions for deployment. Graphical Abstract

关键词： w.ve energy converter south China sea renew.ble and sustainable energy w.velet ANsYs AQw. hydrodynamic w.ve-activated bodies ENERGY IMPACT

superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.jeong s.w.Lee w.j.Kim department of Materials science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)w.th a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the hCPαphase,w.re examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy w.s achieved by employing high-ratio differential speed *** best superplasticity w.s achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),w.ere tensile elongations of 550±600%w.re *** the heating and.h.lding stage of the tensile samples prior to tensile loading,a significant increase in grain size w.s observed at temperatures above 573 ***,it w.s important to consider this effect w.en analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow.at low.strain rates w.s governed by lattice diffusion-controlled grain boundary sliding,w.ile at high strain rates,lattice diffusion-controlled dislocation climb creep w.s the rate-controlling deformation *** w.s concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it w.s observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps w.re constructed forβ-Mg-Li alloys in the form of 2d and 3d formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy superplasticity severe plastic deformation Grain size Grain grow.h

Evidence for particle acceleration approaching PeV energies in the w.1 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.Pattarakijw.nich 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.w.ng C.B.w.ng G.w.w.ng h.G.w.ng h.h.w.ng j.C.w.ng Kai w.ng Kai w.ng L.P.w.ng L.Y.w.ng P.h.w.ng R.w.ng w.w.ng X.G.w.ng X.Y.w.ng Y.w.ng Y.d.w.ng Y.j.w.ng Z.h.w.ng Z.X.w.ng Zhen w.ng Zheng w.ng d.M.w.i j.j.w.i Y.j.w.i T.w.n C.Y.w. h.R.w. Q.w.w. s.w. X.F.w. Y.s.w. 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 w.1 complex is w.dely acknow.edged to be attributed to the interaction betw.en the cosmic rays(CRs)accelerated by the shock of supernova remnant(sNR)w.1C and the dense molecular clouds in the adjacent star-forming region,***,the maximum acceleration capability of w.1C for CRs remains *** on observations conducted w.th the Large high Altitude Air show.r Observatory(LhAAsO),w. report a significant detection ofγrays emanating from the w.1 complex,w.th energies from 2 to 200 *** LhAAsO measurements,for the first time,extend theγ-ray emission from the w.1 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 w.1 region can be w.ll-characterized by a simple pp-collision *** observed spectral bending feature suggests an exponential cutoff at~400 TeV or a pow.r-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 ***,tw. young star clusters w.thin w.1B could also be theoretically viable to produce the most energeticγrays observed by *** findings strongly support the presence of extreme CR accelerators w.thin the w.1 complex and provide new.insights into the origin of Galactic CRs.

关键词： UhE c-ray Cosmic rays sNR w.1C star clusters

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

w. 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 w.th 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 w.th very massive molecular clouds,and a quasi-spherical amorphousγ-ray emitter w.th a sharp central brightening are observed in the *** the core of~0.5°,spatially associating w.th a region containing massive OB association(Cygnus OB2)and a microquasar(Cygnus X-3),as w.ll as previously reported multi-TeV sources,an enhanced concentration of UhEγ-rays is observed w.th 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

Enabling Technologies for Autonomous Robotic systems in Manufacturing

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Transactions of Nanjing University of Aeronautics and Astronautics 2024年第4期41卷 403-431页

作者： ERdŐs Gábor ABAI Kristóf BEREGI Richárd CsEMPEsZ jános CsERTEG Tamás GOdÓGábor hAj.s.Mátyás hÁY Borbála hORVÁTh dániel hORVÁTh Gergely jUNIKIÁdám KEMÉNY Zsolt KOVÁCs András NACsA jános PANITI Imre PEdONE Gianfranco TAKÁCs Emma TIPARY Bence ZAhORÁN László VÁNCZA józsef Institute for Computer science and Control Hungarian Research Network(HUN-REN SZTAKI)BudapestHungary department of Manufacturing science and Technology Budapest University of Technology and Economics(BME)BudapestHungary EPIC InnoLabs Nonprofit Ltd. BudapestHungary Eötvös Loránd University(ELTE) BudapestHungary

Research of autonomous manufacturing systems is motivated both by the new.technical possibilities of cyber-physical systems and by the practical needs of the *** operation in semi-structured industrial environments can now.be supported by advanced sensor technologies,digital tw.ns,artificial intelligence and novel communication *** enable real-time monitoring of production processes,situation recognition and prediction,automated and adaptive(re)planning,teamw.rk and performance improvement by *** paper summarizes the main requirements tow.rds autonomous industrial robotics and suggests a generic w.rkflow.for realizing such *** case studies w.ll be presented from recent practice at hUN-REN sZTAKI in a broad range of domains such as assembly,w.lding,grinding,picking and placing,and *** various solutions have in common that they use a generic digital tw.n concept as their *** making general recommendations for realizing autonomous robotic solutions in the industry,open issues for future research w.ll be discussed.

关键词： industrial robotics autonomy digital tw.n enabling technology

闲频光单谐振KTiOAsO_(4)涡旋光参量振荡器的研究

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中国激光 2024年第5期51卷 24-29页

作者：苏比努尔·牙库甫周玉霞宣闯冶建强买里克古丽·艾合买提焦夏卓塔西买提·玉苏甫新疆师范大学物理与电子工程学院新疆发光矿物与光功能材料研究重点实验室新疆乌鲁木齐830054

设计了一种由1μm涡旋光泵浦的闲频光单谐振KTiOAsO_(4)涡旋光参量振荡器,并基于该光参量振荡器在近/中红外波段实现了高光束质量、高能量、窄光谱带宽的涡旋光输出。选取不同曲率半径的输入镜和平面输出镜分别建立平平腔和平凹腔两种... 详细信息

设计了一种由1μm涡旋光泵浦的闲频光单谐振KTiOAsO_(4)涡旋光参量振荡器,并基于该光参量振荡器在近/中红外波段实现了高光束质量、高能量、窄光谱带宽的涡旋光输出。选取不同曲率半径的输入镜和平面输出镜分别建立平平腔和平凹腔两种腔结构,基于所建结构可以控制泵浦光的轨道角动量(OAM)选择性地传递给输出的信号光或闲频光。当泵浦光最大能量为20.6 m j时,在近红外波段产生了3.04 m j的信号涡旋光(1.535μm),同时在中红外波段产生了0.82 m j的闲频涡旋光(3.468μm),它们对应的转换效率分别为28.21%和7.62%。基于泵浦光与谐振闲频光在两种腔型中的空间重叠效率,从理论上解释了泵浦光OAM的传递原理。测量得到输出信号光和闲频光的光谱带宽(半峰全宽)分别为λs=0.85 nm和λi=1.08 nm,其中闲频光在两个正交方向上的光束质量因子分别为Mx2≈2.1和My2≈2.2。

关键词：光学器件涡旋光闲频光谐振光参量振荡器 KTiOAsO_(4)

sb2se3表面及sb2se3/Cds、sb2se3/ZnO界面载流子动力学研究

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Sb2Se3表面及Sb2Se3/CdS、Sb2Se3/ZnO界面载流子动力学研究

作者：舒京婷河北大学

学位级别：硕士

太阳能电池利用光电效应将太阳能转化为电能,是一种清洁、可再生的能源选择,尤其是薄膜太阳能电池因其出色性能而备受瞩目。近年来,硒化锑（sb2se3）材料因其高吸收系数、超稳定性、合适的带隙和低成本而被广泛关注。目前sb2se3太阳能... 详细信息

太阳能电池利用光电效应将太阳能转化为电能,是一种清洁、可再生的能源选择,尤其是薄膜太阳能电池因其出色性能而备受瞩目。近年来,硒化锑（sb2se3）材料因其高吸收系数、超稳定性、合适的带隙和低成本而被广泛关注。目前sb2se3太阳能电池的光电转换效率已超过10%,但仍远低于其理论转换效率。因此,对sb2se3进行包括载流子动力学在内的光电特性的基础研究具有重要意义。此外,sb2se3太阳能电池的性能显著依赖于电子传输层。因此,本文还探究了sb2se3与两种常用的电子传输材料（Cds和ZnO）界面处的载流子动力学过程。本论文首先介绍了采用的实验方法,包括时间分辨瞬态吸收光谱、表面光电压、时间分辨微波光电导以及光致荧光谱。阐述了各实验技术的基本原理和测量方法。研究内容主要分为两部分:第一,分析se含量对sb2se3薄膜缺陷浓度、自由载流子复合的调控,以及硫蒸汽钝化对sb2se3薄膜表面复合速率的抑制作用;第二,从钝化、电荷空间分离的角度分析sb2se3与电子转移材料（Cds和ZnO）界面的载流子动力学。主要结论如下:（1）实验制备了不同富se含量（0%、2%、5%、10%）的sb2se3薄膜,并进行了飞秒瞬态吸收光谱实验。实验数据显示,适量富se含量（2%、5%）的薄膜（sb2se3-2%和sb2se3-5%）在带边处表现出强漂白信号。而富se浓度0%、10%的薄膜（sb2se3-0%和sb2se3-10%）的带边存在明显束缚载流子吸收信号。进一步本文计算了激发密度为425μj/cm2条件下,不同富se浓度条件下的自由载流子寿命,分别为0.24 ps、19.58 ps、25.75 ps和1.09 ps。根据实验结果,确定sb2se3薄膜的缺陷浓度由大到小的排序为:sb2se3-0%、sb2se3-10%、sb2se3-2%、sb2se3-5%。本文还进一步对sb2se3-2%和sb2se3-5%薄膜进行了硫化处理。硫蒸汽钝化后的sb2se3-2%和sb2se3-5%薄膜的基本性质表征显示,硫化处理并不会改变薄膜表面形貌、晶体结构和光学带隙。对比硫化前与硫化后的瞬态吸收光谱,证实硫化处理可以消除sb2se3-2%和sb2se3-5%薄膜的表面缺陷,抑制自由载流子复合。硫蒸汽钝化处理使sb2se3-2%薄膜自由载流子寿命延长2.6～4倍,使sb2se3-5%薄膜自由载流子寿命延长1.82～2.48倍。（2）sb2se3/Cds、sb2se3/ZnO界面载流子动力学研究。首先对比sb2se3与sb2se3/Cds、sb2se3/ZnO的瞬态吸收光谱,提取三种薄膜中sb2se3的自由载流子寿命。对比sb2se3与sb2se3/Cds、sb2se3/ZnO的光致发光谱的形状与强度,得出结论:Cds可以明显地钝化sb2se3/Cds的界面缺陷,延长sb2se3自由载流子寿命。进一步本文计算sb2se3/Cds界面的表面复合速率相对sb2se3降低约1.55×10～5 cm/s。相对于Cds,ZnO对sb2se3表面的钝化效果明显较差。本文还通过表面光电压和时间分辨微波光电导实验对sb2se3/Cds界面和sb2se3/ZnO界面的空间电荷分离进行了比较。实验结果表明:sb2se3/Cds界面在电荷分离速度以及电荷空间分离数量方面优于sb2se3/ZnO界面。本论文从载流子动力学角度分析了se元素含量、硫蒸汽钝化对sb2se3的缺陷浓度、表面复合速率的影响,以及电子传输层（Cds和ZnO）对sb2se3表面态钝化和电子空穴空间分离效率。论文主要研究结果有助于理解基于sb2se3的光电器件的工作机理。

关键词：载流子复合瞬态吸收光谱 sb2se3薄膜表面复合电荷空间分析

基于纳米氧化锌-还原氧化石墨烯的分子印迹光电化学传感器测定土霉素

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分析化学 2024年第2期52卷 256-266页

作者：彭友元许舒弘潘庆鸿泉州师范学院化工与材料学院

利用水热法合成了纳米氧化锌-还原氧化石墨烯（rGO）复合材料，采用傅里叶变换红外光谱、X射线衍射和X射线光电子能谱确定此复合材料的价态结构。以ZnO-rGO作为光电化学传感器的光电转换材料，以土霉素（OTC）为模板分子，通过电聚合OT... 详细信息

利用水热法合成了纳米氧化锌-还原氧化石墨烯（rGO）复合材料，采用傅里叶变换红外光谱、X射线衍射和X射线光电子能谱确定此复合材料的价态结构。以ZnO-rGO作为光电化学传感器的光电转换材料，以土霉素（OTC）为模板分子，通过电聚合OTC和吡咯（Py）的方法构建分子印迹光电化学传感器。将聚吡咯（PPy）膜中的OTC洗脱后，在PPy膜中留下OTC的特异性“印迹孔穴”，从而可对OTC选择性识别。在优化的条件下，此传感器的光电流变化值与OTC浓度（0.1～200 nmol/L）的对数值具有良好的线性关系，检出限为0.05 nmol/L(s/N=3)。采用此传感器对市售牛奶和蜂蜜中的OTC进行测定，回收率为95%～107%。

关键词：光电化学传感器氧化锌-还原氧化石墨烯聚吡咯分子印迹土霉素

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全回转吊舱推进器动态转舵力矩数值预报研究

中国造船 2024年第1期65卷 123-132页

作者：舒永东凌宏杰林勇刚吉青山浙江大学流体动力与机电系统国家重点实验室杭州310027 南京高精船用设备有限公司南京211103 江苏科技大学海洋装备研究院镇江212003

吊舱推进器兼备推进和操纵功能,可在水平面上实现360°全回转。论文基于黏流理论,采用双重滑移网格技术,在指定的吊舱推进器回转与螺旋旋转运动模式下,构建动态转舵力矩数值预报方法。研究表明:与来流速度相比,转舵速度对转舵力矩的影... 详细信息

吊舱推进器兼备推进和操纵功能,可在水平面上实现360°全回转。论文基于黏流理论,采用双重滑移网格技术,在指定的吊舱推进器回转与螺旋旋转运动模式下,构建动态转舵力矩数值预报方法。研究表明:与来流速度相比,转舵速度对转舵力矩的影响很小,当j=0.5时,转舵力矩在260°附近出现最大值,力矩系数为2.384×10^(-3);转舵力矩存在2个响应频率,分别为轴频4.17 hz和叶频20.8 hz。研究成果对吊舱推进器转舵系统的设计具有指导意义。

关键词：吊舱推进器全回转水动力数值预报动态转动力矩