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Lax connections in TT-deformed integrable field theories

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Chinese Physics C 2021年第9期45卷 125-135页

作者： Bin Chen jue hou Jia Tian School of Physics Peking UniversityNo.5 Yiheyuan RdBeijing 100871China Center for High Energy Physics Peking UniversityNo.5 Yiheyuan RdBeijing 100871China Peng Huanwu Center for Fundamental Theory Hefei 230026China Kavli Institute for Theoretical Sciences(KITS) University of Chinese Academy of ScienceBeijing 100190China

In this work,we attempt to construct the Lax connections of TT-deformed integrable field theories in two different *** reasonable assumptions,we make an ansatz and find the Lax pairs in the TT-deformed affine Toda theories and the principal chiral model by solving the Lax equations *** method is straightforward,but it may be difficult to apply for general *** then make use of a dynamic coordinate transformation to read the Lax connection in the deformed theory from the undeformed *** find that once the inverse of the transformation is available,the Lax connection can be read *** show the construction explicitly for a few classes of scalar models and find consistency with those determined using the first method.

关键词： integrable field theory Latex connection TT deformation

A metallogenic model for the supergiant gold system in Jiaodong province:Constraints from crustal velocity structure

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Science China Earth Sciences 2023年第12期66卷 2898-2913页

作者： jue hou Tao XU Yinshuang AI Guiping YU Yingjie YANG Bo XU Qingfei WANG Institute of Geophysics China Earthquake AdministrationBejing 100081China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBejing 100029China Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of"SciencesBeljing 100029China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeoplysicsChinese Academy of SciencesBeijing 100029China Universily of Chinese Academy of Sciences Bejing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China College of Earth Science Guilin University of Technology.Guilin 541004.China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBejing 100083China

We investigate the role of crustal architectures playing in controlling the genesis and nature of supergiant Jiaodong orogenic gold system via seismic *** deployed an NWW-SEE-trending broadband seismic linear array traversing the province to construct a shear wave velocity(V_S)transect based on ambient noise *** crustal V_S transect reveals a prominent low velocity zone(LVZ)at 12–20 km depths across the whole province and high V_S anomalies at 8–12 km depths underneath the western part that hosts most of the ore *** interpret the former as a hydrothermal alteration zone related to mineralization and the latter as a crustal component containing large amounts of mafic rocks(e.g.,amphibolites).In addition,a listric fault system and a strike-slip fault system are imaged in the western and eastern parts of the province,*** features of crustal velocities with regional geological observations that ores are tempo-spatially associated with mafic dikes,we propose a model of gold metallogenic *** this model,ponding and degassing of the mafic magmas led to the formation of a hydrothermal alteration LVZ in the middle crust prior to ***,auriferous fluid was released from this intra-crustal hydrothermal alteration zone as it was heated by upwelling *** ore fluid ascending along the listric fault system possibly leached extra gold from the upper-crustal ***,the gold-rich fluid migrated up along different fault systems,leading to the disseminated-veinlet mineralization with great gold endowment in the western listric fault system and the quartz-vein type mineralization with relatively small ore tonnage in the eastern strike-slip fault system.

关键词： Jiaodong gold province Ore fluid Ambient noise tomography Crustal velocity structure

Preparation of dynamic polyurethane networks with UV-triggered photothermal self-healing properties based on hydrogen and ion bonds for antibacterial applications

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Journal of Materials Science & Technology 2023年第2期133卷 89-101页

作者： Huimeng Feng Wei Wang Tong Wang Lei Zhang Wen Li jue hou Shougang Chen School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China

Photo-induced self-healing composites have attracted more and more attention as a kind of materials that can be controlled remotely and accurately in real ***,we report a strategy of a photo-responsive system based on hydrogen and ion bonds capable of performing self-healing process by ultraviolet wave-lengths,which is covalently cross-linked zinc-dimethylglyoxime-polyurethane coordination network with triple dynamic *** recombination of hydrogen bond and metal coordination bond produces ef-fective healing *** self-healing behavior and temperature dependence of 3D micro-crack is investigated by molecular dynamics simulations to reveal the mechanism of self-healing at molecu-lar ***,the hybrid of copper-doped zinc oxide not only provides metal coordination bonds to enhance the self-healing rate,but also enhances the photothermal effect and anti-bacterial properties of ***,doping of copper generates more defects and forms a space charge layer on the surface of zinc *** defects could trap surface electrons and holes,preventing the recom-bination of photo-induced electron-hole pairs,generating more heat through lattice ***,under ultraviolet light irradiation,the polyurethane can reach 62.7°C for 60 s,and the scratches of the polyurethane can be healed within 30 min and fully healed within 1 h.

关键词： Cu-dopped ZnO Ionic bond Photothermal Self-healing Antibacterial

The deep background of large-scale,Mesozoic Cu-Au-W metallogenesis in northeastern South China:Constraints from Yingshan-Changshan wide-angle seismic reflection/refraction data

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Science China Earth Sciences 2022年第11期65卷 2202-2218页

作者： jue hou Tao XU Qingtian LV Zhiming BAI Yongqian ZHANG Zhiyu ZHANG Dan YANG State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China China Academy of Geological Sciences Beijing 100037China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Universityof Chinese Academy of Sciences Bejing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China Institute of Geology China Academy of Geological SciencesBeijing 100037China Institute of Mineral Resources China Academy of Geological SciencesBeijing 100037China

To investigate the geodynamic processes of Mesozoic large-scale mineralization in South China,we deployed a 350-km-long,wide-angle seismic reflection/refraction sounding profile between Yingshan in Hubei and Changshan in *** profile traverses the Cu-Au metallogenic belt in the middle and lower reaches of the Yangtze River(YMB),the Jiangnan W-polymetal metallogenic belt(JNMB),and the Qinhang Cu-polymetal metallogenic belt(QHMB).Our imaging results reveal various interesting velocity features along the profile.(1)The velocity structure is characterized by vertical layering and horizontal blocking;(2)the YMB is marked by high velocity and high V_(p)/V_(s) ratios in general with a significantly uplifted Moho interface and a thin crust of~31 km,and the lower crust contains high-velocity anomalies and has the characteristics of a crustmantle transition zone;(3)the JNMB is bounded by the Jiangnan fault and Jingdezhen-Huangshan fault and has low-velocity anomalies and low V_(p)/V_(s) ratios;and(4)the QHMB is characterized by high-velocity anomalies and high V_(p)/V_(s) *** highvelocity anomalies in the YMB and QHMB represent relatively Cu-Au-rich mafic juvenile lower *** formation of this kind of crust is considered to be related to mantle-derived magma underplating or residues of Neoproterozoic oceanic crustal materials,and it also provided sources for large-scale Cu-Au mineralization in the *** JNMB has features similar to those of ancient crusts enriched in W-Sn,the partial melting of which played a leading role in the formation of the superlarge W deposits in this *** these results and other regional geological data,we propose that a large-scale oblique upwelling of the asthenosphere along the collisional belt of the Yangtze and Cathaysia blocks during the Mesozoic was the deep driving mechanism for the explosive mineralization of Cu,Au,and W in northeastern South *** boundaries of the blocks or terrains and discontinui

关键词： Northeastern South China Metallogenic belt of the middle and lower reaches of the Yangtze River Wide-angle seismic reflection/refraction Yingshan-Changshan seismic profile Crustal velocity structure

Ray tracing of turning wave in elliptically anisotropic media with an irregular surface

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Earthquake Science 2017年第5期30卷 219-228页

作者： Minghui Zhang Tao Xu Zhiming Bai Youshan Liu jue hou Guiping Yu Key Laboratory of Earthquake Geodesy Institute of SeismologyChina Earthquake AdministrationWuhan 430071China State Key Laboratory of Lithospheric Evolution Institute ofGeology and GeophysicsChinese Academy of ScienceBeijing 100029China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Institute of Geophysics China Earthquake AdministrationBeijing 100081China University of Chinese Academy of Science Beijing 100049China

Seismic ray tracing in anisotropic media with irregular surface is crucial for the exploration of the fine crustal structure. Elliptically anisotropic medium is the type of anisotropic media with only four independent elastic parameters. Usually, this medium can be described by only the vertical phase velocity and the horizontal phase velocity for seismic wave propagation. Model parameteri- zation in this study is described by flexible triangular grids, which is beneficial for the description of irregular surface with high degree of approximation. Both the vertical and horizontal phase velocities are defined in the triangular grids, respectively, which are used for the description of phase velocity distribution everywhere in the model by linear interpolation. We develop a shooting ray tracing method of turning wave in the elliptically anisotropic media with irregular surface. Runge-Kutta method is applied to solve the partial differential equation of seismic ray in elliptically anisotropic media. Linearly modified method is used for adjusting emergent phase angles in the shooting scheme. Numerical tests demonstrate that ray paths coincide well with analytical trajectories in trans- versely homogeneous elliptically anisotropic media. Seis- mic ray tracing results in transversely inhomogeneous elliptically anisotropic media demonstrate that our method is effective for further first-arrival tomography in ellipti- cally anisotropic media with an irregular surface.

关键词： Ray tracing Elliptically anisotropic media Vertical and horizontal phase velocity Irregular surface Triangular grids

Joint tomographic inversion of first-arrival and reflection traveltimes for recovering 2-D seismic velocity structure with an irregular free surface

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Earth and Planetary Physics 2018年第3期2卷 220-230页

作者： XinYan Zhang ZhiMing Bai Tao Xu Rui Gao QiuSheng Li jue hou José Badal Key Laboratory of Deep-Earth Dynamics of Ministry of Land and Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China School of Earth Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Physics of the Earth Sciences BUniversity of ZaragozaSpain

Irregular surface flattening,which is based on a boundary conforming grid and the transformation between curvilinear and Cartesian coordinate systems,is a mathematical method that can elegantly handle irregular surfaces,but has been limited to obtaining first arrivals *** combining a multistage scheme with the fast-sweeping method(FSM,the method to obtain first-arrival traveltime in curvilinear coordinates),the reflected waves from a crustal interface can be traced in a topographic model,in which the reflected wavefront is obtained by reinitializing traveltimes in the interface for upwind branches.A local triangulation is applied to make a connection between velocity and interface *** a joint inversion of first-arrival and reflection traveltimes for imaging seismic velocity structures in complex terrains is *** examples all perform well with different seismic velocity *** increasing topographic complexity and even use of a high curvature reflector in these models demonstrate the reliability,accuracy and robustness of the new working scheme;checkerboard testing illustrates the method's high *** tolerance testing indicates the method's ability to yield practical traveltime *** development of the multistage scheme will allow other later arrivals to be traced and used in the traveltime inversion.

关键词： irregular surface flattening boundary conforming grid multistage scheme traveltime tomography

甘油直接制备丙烯醇的催化剂和反应工艺研究进展

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化工进展 2020年第7期39卷 2648-2655页

作者：侯珏李春虎中国海洋大学材料科学与工程学院山东青岛266100 中国海洋大学化学化工学院山东青岛266100

丙烯醇是一种十分重要的中间体和化学原料。近年来,以甘油为原料直接制备丙烯醇的研究引起了许多科学家的关注。本文参考了最近十年来发表的文献,详细介绍了均相甲酸诱导的甘油脱氧脱水反应、催化剂作用下的甘油脱氧脱水反应、液固相甘... 详细信息

丙烯醇是一种十分重要的中间体和化学原料。近年来,以甘油为原料直接制备丙烯醇的研究引起了许多科学家的关注。本文参考了最近十年来发表的文献,详细介绍了均相甲酸诱导的甘油脱氧脱水反应、催化剂作用下的甘油脱氧脱水反应、液固相甘油氢解反应和气固相甘油氢转移反应等过程制备丙烯醇的相关工艺、反应机理和催化剂的研究进展及发展趋势,并对比了上述工艺的优缺点。其中,均相甲酸诱导的甘油脱氧脱水工艺比较成熟,已经在实验室中得到验证和应用,但是甲酸的消耗量大,整个过程的原子经济性很差。甘油脱氧脱水反应和液固相甘油氢解反应不仅需要采用价格昂贵的铼基催化剂,而且丙烯醇的选择性较低。铁基催化剂作用下的气固相甘油氢转移反应制备丙烯醇,由于催化剂的价格低廉、制备工艺简单、产品分离容易等优势而备受关注,是最近五年的研究热点。在文献基础上,认为今后研究应该重点关注催化剂的酸碱性、氢转移能力及其与速率控制步骤的匹配,并有针对性地对催化剂进行优化和改进。

关键词：丙烯醇甘油催化剂反应机理

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船舶与岸电并网控制策略研究

船舶工程 2017年第1期39卷 86-90页

作者：侯珏交通运输部水运科学研究院北京100088

岸电与靠港船舶并网控制技术是岸电的核心技术之一,能够实现岸电向船舶的不间断和稳定供电。针对传统岸电控制策略频率稳定性差和不能接受船舶能量管理系统调度的缺点,文章提出了一种基于改进下垂控制的岸电与船舶电网并网策略,使岸电... 详细信息

岸电与靠港船舶并网控制技术是岸电的核心技术之一,能够实现岸电向船舶的不间断和稳定供电。针对传统岸电控制策略频率稳定性差和不能接受船舶能量管理系统调度的缺点,文章提出了一种基于改进下垂控制的岸电与船舶电网并网策略,使岸电逆变器在具有下垂特性的同时,还具有类似于船舶同步柴油发电机转子的惯性。岸电通过并网预同步控制与船舶电网并网,不会产生大的电流冲击。通过改进下垂控制能够有效提升并网后电压和频率的稳定性,提高船舶电网的电能质量,且能够接受船舶能量管理系统的调度。通过仿真试验,并与传统下垂控制策略进行对比,结果验证了改进下垂控制策略的有效性。

关键词：船舶岸电船舶排放控制区并网策略

常规超声及超声造影诊断脾硬化性血管瘤样结节性转化

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中国医学影像技术 2021年第12期37卷 1806-1808页

作者：侯珏黄丽萍中国医科大学附属盛京医院超声科辽宁沈阳110004

脾硬化性血管瘤样结节性转化(sclerosing angiomatoid nodular transformation,SANT)是发生于脾脏的罕见良性增生性血管病变,临床多无明显症状,影像学表现多无特异性,难以与其他肿瘤相鉴别。本研究观察超声诊断脾SANT的价值。1资料与方... 详细信息

脾硬化性血管瘤样结节性转化(sclerosing angiomatoid nodular transformation,SANT)是发生于脾脏的罕见良性增生性血管病变,临床多无明显症状,影像学表现多无特异性,难以与其他肿瘤相鉴别。本研究观察超声诊断脾SANT的价值。1资料与方法1.1一般资料收集2017年1月-2021年4月5例中国医科大学附属盛京医院经术后病理确诊为脾SANT的患者,男2例,女3例,年龄21~59岁,中位年龄49岁。检查前患者均签署知情同意书。

关键词：脾肿瘤血管瘤硬化性血管瘤样结节性转化超声检查