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Interaction Study of Guest with Host in Clathrate Hydrate

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Journal of Natural Gas Chemistry 2007年第4期16卷 423-427页

作者： shunle dong physics department college of information science and engineering Ocean University of ChinaQingdao 266100ShandongChina

Lattice dynamical simulations of noble gas hydrate structures I and II have been performed. Potential energies were investigated to study the influence of guest species on the stability of the hydrate structure. Results show that when the diameter of inclusion molecules is between 3 A and 4.2 A, such as Ar and Kr, the critical role of the 512 cage in the stabilization of hydrates becomes effective. For Xe hydrates SI and SII, with the help of lattice dynamical calculations, the modes attributions are identified directly. We proposed the resonant effect of the fingerprint frequency at about 7 meV and 10 meV which arise from the coupling of Xe molecules in the 512 cage with the host lattice.

关键词： clathrate hydrate He Ne Ar Kr Xe lattice dynamical simulation

基于Transformer和动态3D卷积的多源遥感图像分类

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北京航空航天大学学报 2024年第2期50卷 606-614页

作者：高峰孟德森解正源亓林董军宇中国海洋大学计算机科学与技术学院青岛266100

多源遥感数据具有互补性和协同性,近年来,基于深度学习的方法已经在多源遥感图像分类中取得了一定进展,但当前方法仍面临关键难题,如多源遥感图像特征表达不一致,融合困难,基于静态推理范式的神经网络缺乏对不同类别地物的适应性。为解... 详细信息

多源遥感数据具有互补性和协同性,近年来,基于深度学习的方法已经在多源遥感图像分类中取得了一定进展,但当前方法仍面临关键难题,如多源遥感图像特征表达不一致,融合困难,基于静态推理范式的神经网络缺乏对不同类别地物的适应性。为解决上述问题,提出了基于跨模态Transformer和多尺度动态3D卷积的多源遥感图像分类模型。为提高多源特征表达的一致性,设计了基于Transformer的融合模块,借助其强大的注意力建模能力挖掘高光谱和LiDAR数据特征之间的相互作用;为提高特征提取方法对不同地物类别的适应性,设计了多尺度动态3D卷积模块,将输入特征的多尺度信息融入卷积核的调制,提高卷积操作对不同地物的适应性。采用多源遥感数据集Houston和Trento对所提方法进行验证,实验结果表明:所提方法在Houston和Trento数据集上总体准确率分别达到94.60%和98.21%,相比MGA-MFN等主流方法,总体准确率分别至少提升0.97%和0.25%,验证了所提方法可有效提升多源遥感图像分类的准确率。

关键词：高光谱图像激光雷达 Transformer 多源特征融合动态卷积

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基于跨域信息同步的多基地主动定位方法

水下无人系统学报 2024年第4期32卷 713-717页

作者：王永丰林晋美董雷邱赛中航航空电子有限公司北京100086 中国电子科技集团公司第十五研究所北京100083 中国海洋大学信息科学与工程学部山东青岛266100

信息同步问题是多基地主动声呐系统应用的难点之一。现有研究和应用中通常假设接收站已知发射站脉冲发射时刻、声源空间位置信息以及发射波形参数,能够据此计算回波声程并对目标进行定位,同时获得回波信号时间处理增益,但这些条件在实... 详细信息

信息同步问题是多基地主动声呐系统应用的难点之一。现有研究和应用中通常假设接收站已知发射站脉冲发射时刻、声源空间位置信息以及发射波形参数,能够据此计算回波声程并对目标进行定位,同时获得回波信号时间处理增益,但这些条件在实际中并不一定能满足。文中讨论了不同应用场景中信息同步面临的障碍和可能采取的方案;然后针对收发站之间存在外部通信链路,但链路不可靠或时延不确定的情况,提出了一种利用跨域信息同步实现多基地主动定位的方法;该方法利用直达波先于目标回波到达接收站这一基本物理规律,接收站先通过外部链路获得发射站位置和波形参数信息,并利用直达波到达时刻和站间距离估计发射时刻,具有较高的工程可行性;最后,对影响时间和位置同步精度的因素以及由时空信息误差所引起的目标定位误差进行讨论和仿真分析。

关键词：跨域信息同步多基地主动声呐

Optomechanical-organized multipulse dynamics in ultrafast fiber laser

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Chinese physics B 2021年第11期30卷 338-342页

作者： lin Huang Yu-Sheng Zhang Yu-dong Cui Ceyear Technologies Co. LtdQingdao 266555China science and Technology on Electronic Test&Measurement Laboratory Qingdao 266555China School of information science and engineering Shandong UniversityQingdao 266237China Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

A novel organized multipulse pattern and its birth dynamics under strong optomechanical effect in microfiber-assisted ultrafast fiber laser are investigated in this *** background pulses are observed to obviously exhibit selectively amplifying self-organized process of evolving into quasi-stable equidistant *** radio frequency spectrum of the multipulse pattern displays a harmonic mode-locking-like behavior with a repetition rate of 2.0138 GHz,corresponding to the frequency of torsional-radial(TR_(2m))acoustic mode in *** results show the evidence of optomechanical effect in dominating the birth dynamics and pattern of multipulse.

关键词： fiber lasers multipulse operation optomechanical effect

Broadband Source Ranging in Shallow Water Using the Ω-Interference Spectrum

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Chinese physics Letters 2010年第6期27卷 110-113页

作者： ZHAO Zhen-dong wang Ning GAO Da-Zhi wang Hao-Zhong college of information science and engineering Ocean University of China Qingdao 266100

The concept of the waveguide invariant is revisited and a simple relationship between the range of source and the quasi-period of the acoustic interference spectrum in the frequency domain （Ω-interference spectrum） is derived. Then a method for a broadband source ranging in shallow water using a single receiver and a broadband guide source, requiring no modeling and no knowledge about the ocean environment, is proposed. The method is validated by simulation and verified with the experimental data.

关键词： Methods Broadband Source Ranging Ω-Interference Spectrum

Asymmetry of Salinity Variability in the Tropical Pacific during Interdecadal Pacific Oscillation Phases

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Advances in Atmospheric sciences 2023年第7期40卷 1269-1284页

作者： Hai ZHI Zihui YANG Rong-Hua ZHANG Pengfei lin Jifeng QI Yu HUANG Meng dong college of Atmospheric sciences Nanjing University of Information Science and TechnologyNanjing 210044China School of Marine sciences Nanjing University of Information Science and TechnologyNanjing 210044China Laoshan Laboratory Qingdao 266237China State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric Physics(IAP)Chinese Academy of SciencesBeijing 100029China Key Laboratory of ocean Circulation and Waves Institute of Oceanologyand Center for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China

It has been recognized that salinity variability in the tropical Pacific is closely related to the Interdecadal Pacific Oscillation(IPO).Here,we use model simulations from 1900 to 2017 to illustrate obvious asymmetries of salinity variability in the tropical Pacific during positive and negative IPO *** amplitude of salinity variability in the tropical Pacific during positive IPO phases is larger than that during negative IPO phases,with a more westward shift of a large Sea Surface Salinity(SSS)anomaly along the *** budget analyses show that the asymmetry of salinity variability during positive and negative IPO phases is dominated by the difference in the surface forcing associated with the freshwater flux[FWF,precipitation(P)minus evaporation(E)],with a contribution of 40%–50%near the dateline on the ***,the relationships between the salinity variability and its budget terms also show differences in their leadlag correlations during positive and negative IPO *** differences in salinity variability during different IPO phases produce asymmetric effects on seawater density which can reduce or enhance upper-ocean ***,the salinity effects may modulate the intensity of El Nino-Southern Oscillation(ENSO),resulting in an enhanced(reduced)El Nino but a reduced(enhanced)La Ni?a during positive(negative)IPO phases by 1.6℃psu^(-1)(1.3℃psu^(-1)),*** is suggested that the asymmetry of salinity variability may be related to the recent change in ENSO amplitude associated with the IPO,which can help elucidate ENSO diversity.

关键词： salinity variability asymmetry upper-ocean stratification Interdecadal Pacfic Oscillation tropical Pacific

直接和间接消费所引起的中国城乡空气污染相关过早死亡不平等性

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science Bulletin 2024年第4期69卷 544-553页

作者：王旌旭林金泰刘宇吴锋倪睿婧陈璐璐任芳萱杜鸣溪李钟仪张浩雨刘正中 Frontier science Center for Deep ocean Multispheres and Earth System(FDOMES)and Physical oceanography Laboratory Ocean University of ChinaQingdao 266100China college of oceanic and Atmospheric sciences Ocean University of ChinaQingdao 266100China Laboratory for Climate and ocean-Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China college of Urban and Environmental sciences Peking UniversityBeijing 100871China Institute of Carbon Neutrality Peking UniversityBeijing 100871China State Key Laboratory of Resources and Environmental information Systems Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China School of Public Policy and Administration Xi’an Jiaotong UniversityXi’an 710049China

Household consumption in china is associated with substantial PM_(2.5)pollution,through activities directly(i.e.,fuel use)and/or indirectly(i.e.,consumption of goods and services)causing pollutant *** and rural households exhibit different consumption preferences and living areas,thus their contributions to and suffering from air pollution could *** this contrast is crucial for comprehending the environmental impacts of the nation’s ongoing urbanization *** we quantify Chinese urban and rural households’contributions to ambient PM_(2.5)pollution and the health risks they suffer from,by integrating economic,atmospheric,and health models and/or *** national premature deaths related to long-term exposure to PM_(2.5)pollution contributed by total household consumption are estimated to be 1.1 million cases in 2015,among which 56%are urban households and 44%are rural *** pollution contributed indirectly,urban households,especially in developed provinces,tend to bear lower mortality risks compared with the portions of deaths or pollution they *** opposite results are true for direct *** china’s rapid urbanization process,without adequate reduction in emission intensity,the increased indirect pollution-associated premature deaths could largely offset that avoided by reduced direct pollution,and the indirect pollution-associated urban–rural inequalities might become *** pollution mitigation strategies from both production and consumption sides could help with reducing pollution-related mortality and associated urban-rural inequality.

关键词： Urban and rural households Pollution contribution Mortality risk Inequality PM_(2.5)

Simulation study of BESⅢwith stitched CMOS pixel detector using AcTs

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Nuclear science and Techniques 2023年第12期34卷 264-270页

作者： Yi Liu Xiao‑Cong Ai Guang‑Yan Xiao Ya‑Xuan Li ling‑Hui Wu Liang‑Liang wang Jia‑Ning dong Ming‑Yi dong Qing‑lin Geng Min Luo Yan Niu An‑Qing wang Chen‑Xu wang Meng wang Lei Zhang Liang Zhang Rui‑Kai Zhang Yao Zhang Ming‑Gang Zhao Yang Zhou School of physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China School of physics Nanjing UniversityNanjing 210093China School of physics Nankai UniversityTianjin 300071China Institute of High Energy physics Chinese Academy of Sciences19B Yuquan RoadShijingshan DistrictBeijing 100049China Research Center for Particle science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China university of Chinese Academy of sciences 19A Yuquan RoadShijingshan DistrictBeijing 100049China School of information science and engineering Harbin Institute of TechnologyWeihai 264209China

The reconstruction of the tracks of charged particles with high precision is crucial for HEP experiments to achieve their physics *** BESⅢdrift chamber,which is used as the tracking detector of the BESⅢexperiment,has suffered from aging effects resulting in degraded tracking performance after operation for approximately 15 *** preserve and enhance the tracking performance of BESⅢ,one of the proposals is to add one layer of a thin cylindrical CMOS pixel sensor based on state-of-the-art stitching technology between the beam pipe and the drift *** improvement in the tracking performance of BESⅢwith such an additional pixel detector compared to that with only the existing drift chamber was studied using the modern common tracking software Acts,which provides a set of detector-agnostic and highly performant tracking algorithms that have demonstrated promising performance for a few high-energy physics and nuclear physics experiments.

关键词： BESⅢtracking detector CMOS pixel sensor Track reconstruction Common tracking software

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