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Three dimensional velocity model and its tectonic implications at China Seismic Experimental Site,eastern margin of the Tibetan Plateau

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Science China Earth Sciences 2024年第7期67卷 2268-2290页

作者： Jianping WU Yan CAI Wei wang Weilai wang changzai wang Lihua FANG Yaning LIU Jing LIU Institute of Geophysics China Earthquake AdministrationBeijing 100081China Beijing Bajatuan Earth Science National Observation and Research Station Beijing 1095China Beijing Earthquake Agency Beijing 100080China

The China Seismic Experimental Site(CSES)is located at the intersection of the Tibetan Plateau,South China Block,and Indian Plate and has complex geological settings and intense crustal deformation,making it one of the most seismically active areas in Chinese mainland.A high-resolution,three-dimensional(3D)crust-mantle velocity structure is crucial for understanding seismotectonic environments,lithospheric deformation mechanisms,and deep dynamic processes.We first constructed a high-vertical-resolution 3D initial velocity model using the joint inversion of receiver functions and surface waves and then obtained a 3D P-and S-wave velocity model(CSES-VM1.0)with the highest lateral resolution of 0.25°for the CSES using double-difference tomography.Owing to the limitations of the Sn observation data,the resolution of the S-wave velocity model in the lower crust and upper mantle was reduced,making it closer to the initial model provided by joint inversion.A comparison with explosive-source seismic data showed that the synthetic P-wave first-arrival travel times of the new model were closer to the observations than those of the previous velocity models.The velocity cross-sections across the source areas of the 2022 Lushan MS6.1 and Ludian MS6.8 earthquakes reveal that the former earthquake occurred near a weak contact zone between the Tibetan Plateau and Sichuan Basin,and the rupture of the latter earthquake occurred in a granitic area,with the northern end blocked by rigid high-velocity bodies.A clear high-velocity anomaly zone is distributed along the western margin of the Yangtze Block,revealing the spatial distribution of Neoproterozoic intermediate-basic intrusions.This high-velocity zone significantly controls the morphology of fault zones and influences the rupture processes of major earthquakes.Two northeast-southwest and north-south trending high-velocity anomalies were found near Panzhihua,potentially related to Neoproterozoic and Middle-Late Permian intermediate-basic intrusions.The imaging results revealed t

关键词： Eastern Tibetan Plateau China Seismic Experimental Site Yangtze Block Velocity model Double-difference tomography

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P-wave velocity structure beneath reservoirs and surrounding areas in the lower Jinsha River

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Earthquake Science 2023年第1期36卷 64-75页

作者： changzai wang Jianping Wu Lihua Fang Yaning Liu Jing Liu Yan Cai Poren Li Institute of Geophysics China Earthquake AdministrationBeijing 100081China

The lower reaches of the Jinsha River are rich in hydropower resources because of the high mountains,deep valleys,and swift currents in this area.This region also features complex tectonic structures and frequent earthquakes.After the impoundment of the reservoirs,seismic activity increased significantly.Therefore,it is necessary to study the P-wave velocity structure and earthquake locations in the lower reaches of the Jinsha River and surrounds,thus providing seismological support for subsequent earthquake prevention and disaster reduction work in reservoir areas.In this study,we selected the data of 7.670 seismic events recorded by the seismic networks in Sichuan.Yunnan,and Chongqing and the temporary seismic arrays deployed nearby.We then applied the double-difference tomography method to this data,to obtain the P-wave velocity structure and earthquake locations in the lower reaches of the Jinsha River and surrounds.The results showed that the Jinsha River basin has a complex lateral P-wave velocity structure.Seismic events are mainly distributed in the transition zones between high-and low-velocity anomalies,and seismic events are particularly intense in the Xiluodu and Baihetan reservoir areas.Vertical cross-sections through the Xiangjiaba and Xiluodu reservoir areas revealed an apparent high-velocity anomaly at approximately 6 km depth:this high-velocity anomaly plays a role in stress accumulation,with few earthquakes distributed inside the high-velocity body.After the impoundment of the Baihetan reservoir,the number of earthquakes in the reservoir area increased significantly.The seismic events in the reservoir area north of 27°N were related to the enhanced activity of nearby faults after impoundment:the earthquakes in the reservoir area south of 27°N were probably induced by additional loads(or regional stress changes),and the multiple microseismic events may have been caused by rock rupture near the main faults under high pore pressure.

关键词： double-different tomography downstream of the Jinsha River earthquake location P-wave velocity structure reservoir earthquakes

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Synthesis of magnetic carbonaceous acid derived from waste garlic peel for biodiesel production via esterification

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Frontiers in Energy 2023年第1期17卷 176-187页

作者： Hewei YU Jinke WU Wei WEI Xingyu ZHANG changzai REN Yaoqi DONG Shen CHENG School of Energy and Power Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Waste biomass-supported magnetic solid acids have particular advantages in catalyst separation.First,a novel magnetic carbonaceous catalyst was synthesized from waste garlic peel(GP)via in situ impregnation before conducting carbonization at 450–600°C and sulfonation at 105°C.The physical and chemical properties of the synthesized catalysts were characterized.It was found that the magnetism of the catalyst increased with the carbonization temperature.The optimized catalyst,carbonized at 600℃(C600-S),possessed an excellent magnetization value of 12.5 emu/g,with a specific surface area of 175.1 m^(2)/g,a pore volume of 0.16 cm^(3)/g,and an acidic property of 0.74 mmol/g-SO3H density.By optimizing the esterification conditions to produce biodiesel,an oleic acid conversion of 94.5%was achieved at w(catalyst dosage)=10%(w is mass fraction),a molar ratio of n(methanol):n(oleic acid)=10:1(n is the amount of substance),and a reaction for 4 h at 90℃.Further,for catalyst regeneration,it was found that sulfuric acid treatment was more effective for improving the esterification activity than solvent washing,with which a conversion of more than 76%was achieved after the third run.

关键词： garlic peel(GP) magnetic carbonaceous acid esterification biodiesel

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“双减”背景下体育培训业高质量发展动力、阻滞与策略

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体育科技文献通报 2024年第2期32卷 161-164,213页

作者：黎镇鹏王长在侯林方杨伟文丁浩李奇中山市杨仙逸中学广东中山528400 浙江农林大学浙江杭州311300 长沙市周南梅溪湖中学湖南长沙410000

“双减”政策的实施不仅规范了体育培训市场秩序,也提升了体育培训服务质量,为促进体育培训业高质量发展提供了动力引擎。本文运用文献资料、逻辑推理等研究方法,基于“双减”背景剖析体育培训业高质量发展的动力要素与阻滞因素,提出应... 详细信息

“双减”政策的实施不仅规范了体育培训市场秩序,也提升了体育培训服务质量,为促进体育培训业高质量发展提供了动力引擎。本文运用文献资料、逻辑推理等研究方法,基于“双减”背景剖析体育培训业高质量发展的动力要素与阻滞因素,提出应对策略。研究认为,体育培训业高质量发展的动力要素主要是:国家政策导向引领体育培训创新发展的行动力、国民体育消费需求急剧上升的拉动力、体育中考促进体育培训市场日趋增量的驱动力、企业间的博弈竞争促进体育培训业提质增效的推动力。目前在体育培训业发展中存在的阻滞因素主要有:①监管障碍:体育培训市场监管机制缺乏;②融合壁垒:体育培训与学校体育协调不足;③创新不足:体育培训服务内容同质化严重;④思维固化:应试思维与学生焦虑风险并存;⑤粘性不高:难以提升体育消费忠诚度等。据此,建议:①建立多元协同监管体系,完善体育培训市场准入机制;②加强政策支撑,深化校企协同发展;③促进教学模式创新,提升体育培训服务质量;④降低升学压力,树立体育健康价值理念;⑤拓展多运动项目导读,提高体育消费粘性等相关策略。

关键词： “双减”政策体育培训业高质量发展动力要素

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Relocation of the Yushu M_S7.1 earthquake and its aftershocks in 2010 from HypoDD

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Science China Earth Sciences 2013年第2期56卷 182-191页

作者： wang WeiLai WU JianPing FANG LiHua wang changzai Institute of Geophysics China Earthquake Administration

After the Yushu M S 7.1 earthquake on April 14,2010,a large number of aftershocks were recorded by the surrounding permanent network and temporary seismic stations.Due to the distribution of stations,knowledge about velocity structure,the reliability of seismic phases,and so on,the location result from conventional method is usually of low precision,from which it is difficult to recognize the spatial and temporal distribution and the trends of aftershock activity.In this paper,by using teleseismic waveforms recorded by permanent station,the seismic velocity structure beneath the vicinity is obtained from receiver function stacking and inversion methods.And the Yushu earthquake sequences are relocated from seismic phase data by HypoDD.The results show that the Yushu M S 7.1 earthquake occurred at 13 km depth;the aftershock sequences were distributed mainly in the NWW along the Garzê-Yushu fault,and most aftershocks were concentrated in a 100 km length and 5-20 km depth.Combined with the velocity structure,it can be inferred that the earthquake mainly destroys the high-velocity layer of the upper crust.In the west of the seismic fault near(33.3°N,96.2°E),the aftershock sequences were distributed like a straight column,suggesting there was a comminuted break from 25km depth to the ground.

关键词：余震活动大地震速度结构余震序列地震台站反演方法接收函数地震序列

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Relocation of the 2012 M_s6.6 Xinjiang Xinyuan earthquake sequence

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Science China Earth Sciences 2014年第2期57卷 216-220页

作者： FANG LiHua WU JianPing wang changzai wang WeiLai YANG Ting Institute of Geophysics China Earthquake Administration

At 05:07 AM on June 30,2012(Beijing time),an Ms6.6earthquake(hereafter referred to as Xinyuan earthquake)occurred at the junction of Xinyuan County,Ili Kazak Autonomous Prefecture and Hejing County,Bayinguoleng Mongol Autonomous Prefecture in Xinjiang Uygur Autonomous Region.The location of the main shock determined by China Earthquake Network Center is 43.4°N,84.8°E and focal depth is 7 km.By the end of 08:00 AM

关键词：新疆维吾尔族地震序列定位北京时间新源县和静县哈萨克交界处

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Thermodynamic data calculation for iron phases in sulfoaluminate cementitious materials prepared using solid wastes

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Chinese Journal of Chemical Engineering 2019年第12期27卷 2989-2993页

作者： Wenlongwang Guolin Li Lizhi Zhou changzai Ren National Engineering Laboratory of Coal-fired Pollutants Emission Reduction Shandong Provincial Key Lab of Energy Carbon Reduction and Resource UtilizationShandong UniversityJinan 250061China

The preparation of sulfoaluminate cementitious materials(SCM)is a promising way to massively utilize solid wastes.Iron phases are significant in SCM system but the thermodynamic data of some key minerals,such as6 CaO·Al2 O3·2 Fe2 O3(C6 AF2)and 6 CaO·2 Al2 O3·Fe2 O3(C6 A2 F),are missing,which greatly hinders the SCM optimization in a theoretical way.This work,for the first time,calculated the standard formation enthalpy,Gibbs free energy of formation,entropy and molar heat capacity for C6 AF2 and C6 A2 F and lowered the errors to the least with the reference of C4 AF data in the literature.By building the function diagram of Gibbs free energy changes with temperature for the basic iron phase formation reactions with the obtained thermodynamic data,it is proved that the formation likeliness of C6 AF2 is higher than that of C6 A2 F,as is accordant to the literatures and verifies the correctness of obtained data.This work provides a good theoretical foundation to optimize SCM mineral system and to study relevant mechanism deeply.

关键词： Sulfoaluminate cement Iron phase Thermodynamic data Gibbs free energy Solid waste utilization

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Relocation of the mainshock and aftershock sequences of M_S7.0 Sichuan Lushan earthquake

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Chinese Science Bulletin 2013年第28期58卷 3451-3459页

作者： FANG LiHua WU JianPing wang WeiLai Lü ZuoYong wang changzai YANG Ting CAI Yan Institute of Geophysics China Earthquake Administration Guangdong Earthquake Administration

The mainshock of April 20,2013 Sichuan Lushan MS7.0 earthquake was relocated using a 3-D velocity model.Double difference algorithm was applied to relocate aftershock sequences of Lushan earthquake.The locations of 2405 aftershocks were determined.The location errors in E-W,N-S and U-D direction were 0.30,0.29 and 0.59 km on average,respectively.The location of the mainshock is 102.983°E,30.291°N and the focal depth is 17.6 km.The relocation results show that the aftershocks spread approximately 35 km in length and 16 km in width.The dominant distribution of the focal depth ranges from 10 to 20 km.A few earthquakes occurred in the shallow crust.Focal depth profiles show fault planes dip to the northwest,manifested itself as a listric thrust fault.The dip angle is steep in the shallow crust and gentle in the deep crust.Although the epicenters of aftershocks distributed mainly along both sides of the Shuangshi-Dachuan fault,the seismogenic fault may be a blind thrust fault on the eastern side of the Shuangshi-Dachuan fault.Earthquake relocation results reveal that there is a southeastward tilt aftershock belt intersecting with the seismogenic fault with y-shape.We speculate it is a back thrust fault that often appears in a thrust fault system.Lushan earthquake triggered the seismic activity of the back thrust fault.

关键词：余震序列地震发生庐山主震四川逆冲断层系统显示故障震源深度

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体育化阐释与文明的进程关系研究

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体育学刊 2022年第2期29卷 20-25页

作者：王松阿柔娜王长在郭振清华大学体育部北京100084 清华大学社会科学学院北京100084 南京航天航空大学体育部江苏南京210016 中山市中山纪念中学广东中山528454

个体的社会的体育化与文明的进程相互交织在一起,具有“共时性”的社会型构和“贯时性”的历史变迁。体育化是埃利亚斯体育社会学理论的重要概念,其主要关注个体在体育运动中如何进行文明化,并着重反映文明的进程中个体的体育运动行为... 详细信息

个体的社会的体育化与文明的进程相互交织在一起,具有“共时性”的社会型构和“贯时性”的历史变迁。体育化是埃利亚斯体育社会学理论的重要概念,其主要关注个体在体育运动中如何进行文明化,并着重反映文明的进程中个体的体育运动行为从外在强制逐步到内在自我控制的进程。以埃利亚斯体育社会学理论中体育化概念阐释为起点,理清埃利亚斯体育化的型构逻辑,进而付诸体育化以型构社会学解释,即体育化的社会发生与心理发生。体育运动的全球化使得体育化往往超脱文明的域境,进而与文明的进程产生“互构”,即体育化为文明的进程“寻求兴奋”,文明的进程建构体育化“情感文明”。

关键词：个体的社会体育化文明的进程埃利亚斯

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督脉火针为主治疗老年神经源性体位性低血压1例

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中医杂志 2023年第17期64卷 1833-1836页

作者：郭长在王少松夏秋玉崔莹雪王鑫首都医科大学附属北京中医医院北京市100010 河北省容城县中医医院

神经源性体位性低血压常见于神经退行性疾病,中医学多辨证为肾阳虚衰。火针点刺督脉穴位及肾俞穴、志室穴,可疏通督脉气血,达到温阳通脉、益精填髓的治疗效果。报告1例老年神经源性体位性低血压患者,应用贺氏火针点刺患者以督脉为主的... 详细信息

神经源性体位性低血压常见于神经退行性疾病,中医学多辨证为肾阳虚衰。火针点刺督脉穴位及肾俞穴、志室穴,可疏通督脉气血,达到温阳通脉、益精填髓的治疗效果。报告1例老年神经源性体位性低血压患者,应用贺氏火针点刺患者以督脉为主的穴位及肾俞、志室穴,经治疗近2个月后患者站立位血压差及阳虚症状均显著改善,并对患者进行了血压监测、中医证型量表评估及肾俞区域红外成像仪检测,临床疗效确切。

关键词：神经源性体位性低血压火针督脉肾俞志室肾阳虚衰证

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