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SmartMat 2023年第2期4卷 106-119页

作者： Liuqing Yang Lihui Dong David Hall Mahdi Hesari Yoann Olivier Eli Zysman‐Colman zhifeng ding Department of Chemistry Western UniversityOntarioLondonCanada Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanningChina Organic Semiconductor Centre EaStCHEM School of ChemistryUniversity of St AndrewsSt AndrewsFifeUK Laboratory for Chemistry of Novel Materials University of MonsMonsBelgium Laboratory for Computational Modeling of Functional Materials Namur Institute of Structured MatterUniversity of NamurNamurBelgium

The electrochemiluminescence(ECL)behavior of a multiresonance thermally activated delayed fluorescence molecule has been investigated for the first time by means of ECL‐voltage curves,newly designed ECL‐time observatory,and ECL *** compound,Mes3DiKTa,shows complex ECL behavior,including a delayed onset time of 5 ms for ECL generation in both the annihilation pathway and the coreactant route,which we attribute to organic long‐persistent ECL(OLECL).Triplet‐triplet annihilation,thermally activated delayed fluorescence and uncompensated solution resistance cannot be ruled out as contributing mechanisms to the ECL.A very long ECL emission decay was attributed to OLECL as *** absolute ECL efficiencies of Mes3DiKTa were enhanced and reached 0.0013%in annihilation route and 1.1%for the coreactant system,which are superior to those of most other organic ECL *** is plausible that ECL materials with comparable behavior as Mes3DiKTa are desirable in applications such as ECL sensing,imaging,and light‐emitting devices.

关键词： electrochemiluminescence multiresonant thermally activated delayed fluorescence organic long‐persistent electrochemiluminescence triplet‐triplet annihilation

Preface to the special issue China Seismic Experimental Site(CSES):on-going progresses and future prospects

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Earthquake Science 2021年第3期34卷 189-191页

作者： Zhongliang Wu zhifeng ding Institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China Institute of Geophysics China Earthquake AdministrationBeijing 100081China

In 2018,the International Conference for the Decade Memory of the Wenchuan Earthquake in connection to the 4th International Conference on Continental Earthquakes(4th ICCE)and the 12th Assembly of Asian Seismological Commission(ASC)officially announced the establishment of China Seismic Experimental Site(CSES)in the Sichuan-Yunnan *** focuses on the field experiments on a broad spectra of scientific problems in earthquake science,from the tectonics and physics of earthquakes and faulting to the engineering countermeasures for disaster risk *** spring of 2021,approved by the Standing Committee of the National People's Congress of China,CSES as a key state scientific infrastructure was enlisted in the 14th national five-year plan(2021–2025)of economic and social development and the long-term vision of 2035,which is considered as a major step for promoting earthquake science in *** 2018,the planning,construction and functioning of CSES have attracted much attention in earthquake science(CSES,2020a,b,c;Wu ZL et al.,2021a,b,c,d).This special issue of Earthquake Science,similar to other publications(e.g.,Li YG et al.,2021),reflects a profile of the on-going works of CSES,by CSES,and for *** 8 articles are included in the present issue,covering some aspects of research scopes of CSES.

关键词： China Seismic earthquake

Brood sex ratio in the Yellow-bellied Prinia(Prinia flaviventris)

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Avian Research 2017年第2期8卷 76-82页

作者： zhifeng ding Fang Ji Qiuli Huang Longwu Wang Aiwu Jiang Chunlan Zhang Yongjun Feng Yuan Tian Huijian Hu Wei Liang Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhou 510260China Ministry of Education Key Laboratory for Tropical Plant and Animal Ecology College of Life SciencesHainan Normal UniversityHaikou 571158China School of Life Sciences Guizhou Normal UniversityGuiyang 550001China College of Forestry Guangxi UniversityNanning 530004China

Background:The adjustment of sex ratios in birds can occur at the egg and nestling stages. Previous studies showed that the sex ratio was affected by environmental factors and parental condition; it may result in seasonal and ecosystem ***:In this study, the brood sex ratio of the Yellow-bellied Prinia(Prinia flaviventris) in the Nonggang area, Guangxi, southwestern China, was investigated during the breeding season from May to June in 2013 using PCR amplification from whole-genome DNA extracted from blood samples. A total of 31 nests of Yellow-bellied Prinia, including 132 brood fledglings and 31 pairs, were ***:The results showed that the brood sex ratio of the Yellow-bellied Prinia was 1:1, and sex ratios of different nests were evenly distributed within the study area. No significant relationship was found between parental quality and nest characteristics with the brood sex ***:The present study indicated that no brood sex ratio bias in the Yellow-bellied Prinia highlighted the complexity of sex ratio adjustment in birds. In spite of our negative results, the lack of an association between brood sex ratio and parental quality and environmental factors in the Yellow-bellied Prinia provides valuable information on the adjustment of sex ratios in birds.

关键词： Brood sex ratio Parental quality Yellow-bellied Prinia Prinia flaviventris Sex ratio adjustment

Joint inversion of Rayleigh group and phase velocities for S-wave velocity structure of the 2021 M_(S)6.0 Luxian earthquake source area,China

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Earthquake Science 2023年第5期36卷 356-375页

作者： Wei Xu Pingping Wu Dahu Li Huili Guo Qiyan Yang Laiyu Lu zhifeng ding Institute of Geophysics China Earthquake AdministrationBeijing 100081China Sichuan Earthquake Agency Chengdu 610039China Key Laboratory of Intelligent Detection and Equipment for Underground Space of Beijing-Tianjin-Hebei Hebei GEO UniversityShijiazhuang 050031China

On September 16,2021,a MS6.0 earthquake struck Luxian County,one of the shale gas blocks in the Southeastern Sichuan Basin,*** understand the seismogenic environment and its mechanism,we inverted a fine three-dimensional S-wave velocity model from ambient noise tomography using data from a newly deployed dense seismic array around the epicenter,by extracting and jointly inverting the Rayleigh phase and group velocities in the period of 1.6–7.2 *** results showed that the velocity model varied significantly beneath different geological *** Yujiasi syncline is characterized by low velocity at depths of~3.0–4.0 km,corresponding to the stable sedimentary layer in the Sichuan *** eastern and western branches of the Huayingshan fault belt generally exhibit high velocities in the NE-SW direction,with a few local low-velocity *** Luxian MS6.0 earthquake epicenter is located at the boundary between the high-and low-velocity zones,and the earthquake sequences expand eastward from the epicenter at depths of 3.0–5.0 *** with the velocity variations around the epicenter,distribution of aftershock sequences,and focal mechanism solution,it is speculated that the seismogenic mechanism of the main shock might be interpreted as the reactivation of pre-existing faults by hydraulic fracturing.

关键词： Luxian earthquake ambient noise tomography S-wave velocity model seismicity seismogenic mechanism joint inversion

Upper mantle anisotropy of the eastern Himalayan syntaxis and surrounding regions from shear wave splitting analysis

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Science China Earth Sciences 2015年第5期58卷 1872-1882页

作者： CHANG LiJun WANG ChunYong ding zhifeng YOU HuiChuan LOU Hai SHAO CuiRu Key Laboratory of Seismic Observation and Geophysical Imaging Institute of GeophysicsChina Earthquake Administration

Polarization analysis of teleseismic data has been used to determine the XKS(SKS,SKKS,and PKS)fast polarization directions and delay times between fast and slow shear waves for 59 seismic stations of both temporary and permanent broadband seismograph networks deployed in the eastern Himalayan syntaxis(EHS)and surrounding *** analysis employed both the grid searching method of the minimum tangential energy and stacking analysis methods to develop an image of upper mantle anisotropy in the EHS and surrounding regions using the newly obtained shear wave splitting parameters and previously published *** fast polarization directions are oriented along a NE-SW azimuth in the ***,within the surrounding regions,the fast directions show a clockwise rotation pattern around the EHS from NE-SW,to E-W,to NW-SE,and then to *** the EHS and surrounding regions,the fast directions of seismic anisotropy determined using shear wave splitting analysis correlate with surficial geological features including major sutures and faults and with the surface deformation fields derived from global positioning system(GPS)*** coincidence between structural features in the crust,surface deformation fields and mantle anisotropy suggests that the deformation in the crust and lithospheric mantle is mechanically *** the EHS,the coherence between the fast directions and the NE direction of the subduction of the Indian Plate beneath the Tibetan Plateau suggests that the lithospheric deformation is caused mainly by *** the regions surrounding the EHS,we speculate that a westward retreat of the Burma slab could contribute to the curved anisotropy *** Tibetan Plateau is acted upon by a NE-trending force due to the subduction of the Indian Plate,and also affected by a westward drag force due to the westward retreat produced by the eastward subduction of the Burma *** two forces contribute to a curved lithospheric deformation that results in the a

关键词： eastern Himalayan syntaxis shear wave splitting anisotropy lithospheric deformation

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Crustal stress field in Yunnan: implication for crust-mantle coupling

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Earthquake Science 2016年第2期29卷 105-115页

作者： Zhigang Xu Zhouchuan Huang Liangshu Wang Mingjie Xu zhifeng ding Pan Wang Ning Mi Dayong Yu Hua Li State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringNanjing University Institute of Geophysics and Geodynamics Nanjing University Institute of Geophysics China Earthquake Administration

We applied the g CAP algorithm to determine 239 focal mechanism solutions 3：0≤MW≤ 6：0） with records of dense Chin Array stations deployed in Yunnan,and then inverted 686 focal mechanisms（including 447 previous results） for the regional crustal stress field with a damped linear inversion. The results indicate dominantly strike-slip environment in Yunnan as both the maximum（r1） and minimum（r3） principal stress axes are sub-horizontal. We further calculated the horizontal stress orientations（i.e., maximum and minimum horizontal compressive stress axes： S H and S h, respectively） accordingly and found an abrupt change near ＊26°N. To the north, S H aligns NW-SE to nearly E-W while S h aligns nearly N-S. In contrast, to the south, both S H and S h rotate laterally and show dominantly fan-shaped patterns. The minimum horizontal stress（i.e., maximum strain axis） S h rotates from NW-SE to the west of Tengchong volcano gradually to nearly E-W in west Yunnan, and further toNE-SW in the South China block in the east. The crustal strain field is consistent with the upper mantle strain field indicated by shear-wave splitting observations in Yunnan but not in other regions. Therefore, the crust and upper mantle in Yunnan are coupled and suffering vertically coherent pure-shear deformation in the lithosphere.

关键词： Tibet Yunnan Focal mechanism solution Stress field Crust-mantle coupling

千岛湖陆桥岛屿鸟类集团对栖息地片段化的敏感性及其季节变化

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生态学报 2015年第20期35卷 6759-6768页

作者：刘超丁志锋丁平浙江大学生命科学学院杭州310058 广东省昆虫研究所华南濒危动物研究所广州510260

为探究千岛湖陆桥岛屿不同鸟类集团对栖息地片段化敏感性的差异和季节变化,于2009年4月—2012年1月鸟类繁殖季(4、5、6月)和冬季(11、12、1月)对千岛湖41个陆桥岛屿鸟类集团进行了研究。结果表明,冬季杂食鸟对片段化敏感性高于食虫鸟,... 详细信息

为探究千岛湖陆桥岛屿不同鸟类集团对栖息地片段化敏感性的差异和季节变化,于2009年4月—2012年1月鸟类繁殖季(4、5、6月)和冬季(11、12、1月)对千岛湖41个陆桥岛屿鸟类集团进行了研究。结果表明,冬季杂食鸟对片段化敏感性高于食虫鸟,繁殖季时二者无显著差异,繁殖季和冬季时下层鸟对片段化敏感性均高于林冠鸟,冬季留鸟对片段化敏感性高于候鸟,繁殖季则无显著差异。杂食鸟和留鸟对片段化敏感性存在季节差异,而食虫鸟、林冠鸟、下层鸟和候鸟对片段化敏感性均无季节差异。不同鸟类集团对栖息地片段化敏感性的差异和季节变化规律,有助于人们在栖息地管理和保护区设计时采取更有针对性的鸟类保护措施。

关键词：鸟类集团栖息地片段化敏感性季节差异

An intersection method for locating earthquakes in complex velocity models

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Applied Geophysics 2007年第4期4卷 294-300页

作者：赵爱华丁志峰中国地震局地球物理研究所北京100081

The intersection method is one of the basic approaches for locating earthquakes and is not only robust but also efficient. However, its location accuracy is not high, especially for focal depth because the velocity model used for the conventional intersection method is based on homogeneous or laterally homogeneous media, which is too simple. In order to improve the accuracy, we have modified the existing intersection method. In the modified approach, the earthquake loci are not assumed to be circular or hyperbolic and calculation accuracy is improved using a minimum traveltime tree algorithm for tracing rays. The numerical model shows that the modified method can locate earthquakes in complex velocity models.

关键词： Earthquake location intersection method ray tracing minimum traveltime tree algorithm

喜马拉雅东构造结及周边地区地壳各向异性特征

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地球物理学报 2021年第11期64卷 3970-3982页

作者：黄臣宇常利军丁志峰中国地震局地球物理研究所北京100081

利用喜马拉雅东构造结及周边地区的48个宽频带地震台站记录的远震波形数据,通过Pms波分裂测量得到了295对地壳各向异性横波分裂参数,获得了研究区的地壳各向异性图像.喜马拉雅东构造结的快波偏振方向主要为NE-SW方向,周边地区的快波偏... 详细信息

利用喜马拉雅东构造结及周边地区的48个宽频带地震台站记录的远震波形数据,通过Pms波分裂测量得到了295对地壳各向异性横波分裂参数,获得了研究区的地壳各向异性图像.喜马拉雅东构造结的快波偏振方向主要为NE-SW方向,周边地区的快波偏振方向呈现出绕东构造结顺时针旋转的趋势.Pms波分裂的慢波延迟时间范围为0.11~0.30 s,平均值为0.24 s.对比分析研究区内Pms波分裂、近震直达S波分裂和远震SKS波分裂的结果发现,上地壳各向异性对Pms波分裂影响有限,地壳各向异性主要来自于中下地壳矿物和熔体的定向排列;地壳各向异性对SKS波分裂影响较小,SKS波分裂主要反映了上地幔的各向异性特征;Pms波分裂的快波偏振方向与近震直达S波分裂和远震SKS波分裂的快波偏振方向表现出较好的一致性,并且与地表构造和变形特征具有较好的相关性,反映了喜马拉雅东构造结及周边地区的岩石圈变形可能为垂直连贯变形模式.

关键词：喜马拉雅东构造结地壳各向异性岩石圈变形 Pms波分裂

利用背景噪声和接收函数研究华北克拉通地壳结构

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地球物理学报 2021年第5期64卷 1585-1596页

作者：姜磊丁志峰高天扬黄翔中国地震局地球物理研究所北京100081 中国地震局震源物理重点实验室北京100081 北京大学地球与空间科学学院北京100871

收集华北克拉通地区188个宽频带流动台站观测资料进行处理.通过背景噪声面波数据和接收函数双重资料约束联合反演,得到了研究区沉积层厚度、地壳厚度及地壳S波速度结构.结果显示:(1)沉积盖层厚度与地质构造相对应,盆地区与隆起区分界明... 详细信息

收集华北克拉通地区188个宽频带流动台站观测资料进行处理.通过背景噪声面波数据和接收函数双重资料约束联合反演,得到了研究区沉积层厚度、地壳厚度及地壳S波速度结构.结果显示:(1)沉积盖层厚度与地质构造相对应,盆地区与隆起区分界明显.(2)研究区地壳厚度变化范围约29~46 km,自西向东逐渐变薄.(3)中、上地壳华北盆地S波速度偏高,可能与新生代以来多次沉降所造成的相对高的岩石强度有关;(4)下地壳S波速度显示研究区主要存在三个低速区,分别是唐山—天津周边、张北及太行山造山带地区;华北盆地存在显著高速异常,推测可能是由于华北盆地经历下地壳拆沉后,大规模的伸展作用相伴随的幔源基性铁镁质岩浆底侵至下地壳结晶所造成的.(5)多个发生过强震的区域表现出沉积层下方存在较大范围的(约10 km)高速体,并且高速体又被其下低S波速度包裹,壳内岩石强度的差异为应力积累及地震发生提供条件.

关键词：联合反演背景噪声接收函数华北克拉通构造演化