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S-wave crustal and upper mantle's velocity structure in the eastern Tibetan Plateau——Deep environment of lower crustal flow

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Science China Earth Sciences 2008年第2期51卷 263-274页

作者： paul silver Carnegie Institution of Washington Washington DC 20015 USA

A teleseismic profile consisting of 26 stations was deployed along 30°N latitude in the eastern Tibetan Plateau. By use of the inversion of P-wave receiver function, the S-wave velocity structures at depth from surface to 80 km beneath the profile have been determined. The inversion results reveal that there is significant lateral variation of the crustal structure between the tectonic blocks on the profile. From Linzhi north of the eastern Himalayan Syntaxis, the crust is gradually thickened in NE direction; the crustal thickness reaches to the maximum value (~72 km) at the Bangong-Nujiang suture, and then decreased to 65 km in the Qiangtang block, to 57―64 km in the Bayan Har block, and to 40―45 km in the Sichuan Basin. The eastern segment of the teleseismic profile (to the east of Batang) coincides geographically with the Zhubalong-Zizhong deep seismic sounding profile carried out in 2000, and the S-wave velocity structure determined from receiver functions is consistent with the P-wave velocity structure obtained by deep seismic sounding in respect of the depths of Moho and major crustal interfaces. In the Qiangtang and the Bayan Har blocks, the lower velocity layer is widespread in the lower crust (at depth of 30―60 km) along the profile, while there is a normal velocity distribution in lower crust in the Sichuan Basin. On an average, the crustal velocity ratio (Poisson ratio) in tectonic blocks on the profile is 1.73 (σ = 0.247) in the Lhasa block, 1.78 (σ = 0.269) in the Banggong-Nujiang suture, 1.80 (σ = 0.275) in the Qiangtang block, 1.86 (σ = 0.294) in the Bayan Har blocks, and 1.77 (σ = 0.265) in the Yangtze block, respectively. The Qiangtang and the Bayan Har blocks are characterized by lower S-wave velocity anomaly in lower crust, complicated Moho transition, and higher crustal Poisson ratio, indicating that there is a hot and weak medium in lower crust. These are considered as the deep environment of lower crustal flow in the eastern Tibetan Plateau. F

关键词： eastern Tibetan Plateau crustal and upper mantle’s structure teleseismic receiver function lower crustal flow

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Seismic anisotropy of upper mantle in eastern Tibetan Plateau and related crust-mantle coupling pattern

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Science China Earth Sciences 2007年第8期50卷 1150-1160页

作者： paul silver Lucy FLESCH Carnegie Institution of Washington Washington DC 200015 USA

By using the polarization analysis of teleseismic SKS waveform data recorded at 116 seismic stations which respectively involved in China National Digital Seismograph Network, and Yunnan, Sichuan, Gansu and Qinghai regional digital networks, and portable broadband seismic networks deployed in Sichuan, Yunnan and Tibet, we obtained the SKS fast-wave direction and the delay time between fast and slow waves of each station by use of the stacking analysis method, and finally acquired the fine image of upper mantle anisotropy in the eastern Tibetan Plateau and its adjacent regions. We analyzed the crust-mantle coupling deformation on the basis of combining the GPS observation results and the upper mantle anisotropy distribution in the study area. The Yunnan region out of the plateau has dif-ferent features of crust-mantle deformation from the inside plateau. There exists a lateral transitional zone of crust-mantle coupling in the eastern edge of the Tibetan Plateau, which is located in the region between 26° and 27°N in the west of Sichuan and Yunnan. To the south of transitional zone, the fast-wave direction is gradually turned from S60°―70°E in southwestern Yunnan to near EW in south-eastern Yunnan. To the north of transitional zone in northwestern Yunnan and the south of western Sichuan, the fast-wave direction is nearly NS. From crust to upper mantle, the geophysical parameters (e.g. the crustal thickness, the Bouguer gravity anomaly, and tectonic stress direction) show the feature of lateral variation in the transitional zone, although the fault trend on the ground surface is inconsis-tent with the fast-wave direction. This transitional zone is close by the eastern Himalayan syntaxis, and it may play an important role in the plate boundary dynamics.

关键词： upper mantle anisotropy SKS wave fast-wave direction crust-mantle coupling lithospheric deformation

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Temporal Seismic Velocity Changes Associated with the Great 2004 and 2005 Sumatra Earthquakes

Temporal Seismic Velocity Changes Associated with the Great ...

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中国地球物理学会第二十六届年会、中国地震学会第十三次学术大会

作者： Teh Ru Alex Song paul G.silver Yokohama Institute for Earth Sciences IFREEJAMSTEC3173-25 Showa-machiKanazawa-kuYokohama CityKanagawa237-0005Japan Department of Terrestrial Magnetism Carnegie Institution of Washington5241 Broad Branch RoadNW Washington DC20015USA

Recent analyses using data from repeating earthquakes and cross -correlation of ambient noise have detected temporal velocity changes associated with large ***,it is not evident where exactly velocity changes are loca... 详细信息

关键词： Temporal Seismic Velocity Changes Associated with the Great 2004 and 2005 Sumatra Earthquakes Velocity

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青藏高原东部上地幔各向异性及相关的壳幔耦合型式

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中国科学（D辑） 2007年第4期37卷 495-503页

作者：王椿镛常利军吕智勇秦嘉政苏伟 paul silver Lucy Flesch 中国地震局地球物理研究所四川省地震局云南省地震局 Carnegie Institution of Washington Washington DC 200015USA

对国家数字地震台网和云南、四川、甘肃、青海区域数字地震台网，以及布设在川、滇、藏地区的宽频带流动地震台网共116个台站所记录的远震SKS波形资料作偏振分析，采用叠加分析方法求得每一个台站的SKS快波偏振方向和快慢波的时间延迟... 详细信息

对国家数字地震台网和云南、四川、甘肃、青海区域数字地震台网，以及布设在川、滇、藏地区的宽频带流动地震台网共116个台站所记录的远震SKS波形资料作偏振分析，采用叠加分析方法求得每一个台站的SKS快波偏振方向和快慢波的时间延迟，获得青藏高原东部及其邻近地区的上地幔各向异性图像．将该地区全球定位系统（GPS）的观测结果与上地幔各向异性分布相结合作地壳一地幔耦合变形的分析，研究表明青藏高原内部和高原外部的云南地区具有不同的壳幔变形特征，在高原的东缘地区（大致位于川滇西部的26°-27°N之间）存在一个壳幔变形的横向过渡带．过渡带以南地区的快波偏振方向从滇西南的S60°-70°E逐渐转变到滇东南的近东西向，以北的滇西北部和川西南部，快波偏振方向为近似的南北向．高原内部表现为强壳幔耦合型，高原外部则属于壳幔解耦型．这一横向过渡带与地表的断裂走向不一致，但在地壳和上地幔，其地球物理场（如：地壳厚度，布格重力异常和构造应力方向等）都具有横向过渡的特征．该横向过渡带邻近东喜马拉雅构造结，在板块边界动力学上有着重要的意义．

关键词：上地幔各向异性 SKS波快波方向壳幔耦合岩石圈变形

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在Visual Basic 9.0中应用XML与数据库查询

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MSDN开发精选 2005年第6期 91-93页

作者： Erik Meijer Amanda silver paul Vick

XML深入支持XLing是一种全新的内存中XML编程API。号门用于利用最新版本的．NET Framework中诸如Language—Integrated Query framework的能力。就像Query Comprehension根据基础标准的．NET Framework查询操作增加了常用、方便的语法... 详细信息

XML深入支持XLing是一种全新的内存中XML编程API。号门用于利用最新版本的．NET Framework中诸如Language—Integrated Query framework的能力。就像Query Comprehension根据基础标准的．NET Framework查询操作增加了常用、方便的语法一样，通过XML文本和对XML的后期绑定，Visual Basic9．0提供了对Xlinq的深入支持。

关键词： XML文本 Visual Basic 数据库查询 Framework Integrated framework Language 应用

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利用偏心质量转动源的地震监测（英文）

利用偏心质量转动源的地震监测（英文）

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2016中国地球科学联合学术年会

作者：钮凤林 paul silver Robert Nigbor 中国石油大学(北京)非常规天然气研究院 Department of Terrestrial Magnetism Carnegie Institute of Washington University of California at Los Angeles

Seismic imaging of temporal changes in crustal velocity has been shown to be an efficient way to detect stress/strain transients occurring at seismogenic depth.A crucial element of such imaging is an appropriate seismic *** ideal source must be sufficiently powerful to propagate 10s of km to permit the monitoring of actual fault zones,highly repeatable to minimize temporal changes in source characteristics,and sufficiently

关键词：地震监测偏心质量

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Towards a sustainable geoliner construction in landflls by potential blending of fly ash with kaolin clay alternative:a review with an insight to Indian scenario

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Waste Disposal and Sustainable Energy 2024年第2期6卷 243-258页

作者： Kshitij Kumar Biswajit paul Department of Environmental Science and Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad 826004JharkhandIndia

Electricity generated through coal-based Thermal Power Plants(TPPs)has played a pivotal role in shaping modern civiliza-tion,revolutionizing industries,and improving the quality of life for billions of people *** TPPs contribute to about 37%-40%of the global energy *** production,in turn,has a direct impact on the economy of any *** from this boon to humankind,these TPPs combusting coal as their primary fuel also have specific environmen-tal impacts,the major ones being water,air,and soil pollution due to unscientific disposal of high-quantity fly ash produced *** we can put this ash to good use,it may assist us in mitigating the pollution caused by *** there are many conventional uses of fly ash,such as a pozzolanic material in the cement industry,more pathways need to be discovered to balance the high generation quantities with ***,a detailed description of its use in potential geoliner applications is presented in this article.A geoliner or a landfill liner acts as a virtually impenetrable layer to mitigate the leachate penetration into the underneath subsoil and groundwater,thus preventing *** are presently some studies that support the use of only fly ash in such ***,the properties of the geoliners using it are not so good to significantly mitigate environmental degradation owing to its high permeability and low densification *** bentonite conventionally used has limited deposits and is mined intensively for its use as a natural *** depos-its must also be conserved,and an alternative material that may serve similar application benefits,like bentonite,must be *** desired aim can be fulfilled if we blend this combustion residue with other suitable materials(such as kaolinite clay)with low ***,the article focuses on the possibilities of blending fly ash with different clays for geoliner construction to improve the in

关键词： Fly ash-Geoliner Environmental management Composite liner systems Bentonite Kaolin clay

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Strain-dependent alpha-synuclein spreading in Parkinson's disease and multiple system atrophy

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Neural Regeneration Research 2024年第12期19卷 2581-2582页

作者： Shuyu Zhang paul Lingor Department of Neurology School of MedicineUniversity Hospital rechts der IsarTechnical University of MunichMunichGermany Department of Neurology University Medical Center GöttingenGöttingenGermany Center for Biostructural Imaging of Neurodegeneration University Medical Center GöttingenGöttingenGermany

Parkinson's disease(PD) and atypical Parkinsonian syndromes,such as multiple system atrophy(MSA) and Dementia with Lewy bodies,are neurodegenerative movement disorders characterized by the accumulation of alphasynuclein(a-syn) *** a-syn aggregates propagate throughout the brain in a prion-like manner,where pathological a-syn recruits endogenous a-syn to form insoluble *** forms representing intermediates on the way to insoluble aggregates result in the most pronounced neurotoxic effects.

关键词： atrophy endogenous atypical

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Tensor perturbations from bounce inflation scenario in f(Q)gravity

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 78-92页

作者： Kun Hu Tanmoy paul Taotao Qiu Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Huazhong University of Science and TechnologyWuhan 430074China National Institute of Technology Jamshedpur Department of PhysicsJamshedpur 831014India

In this paper,we construct a bounce inflation cosmological scenario in the framework of the modified symmetric teleparallel gravity,namely f(Q)theory,and investigate the tensor perturbations *** is well-known,the tensor perturbations generated in the very early Universe(inflation and pre-inflation regions)can account for the primordial gravitational waves(PGWs)that are to be detected by the next generation of GW *** discuss the stability condition of the tensor perturbations in the bounce inflation process and investigate in detail the evolution of the perturbation *** general form of the tensor power spectrum is obtained both for large as well as small scale *** a result,we show both kinds of modes(short or long wavelength modes),and the tensor spectrum may get a positive tilt in the parametric range where the tensor perturbation proves to be stable—this interestingly hints an enhancement of gravitational waves’amplitude in the background of the f(Q)bounce-inflation ***,we study the LQC-like scenario as a specific case of our model,in which,the primordial tensor power spectrum turns out to be nearly scale-invariant on both small and large scales.

关键词： bounce cosmology modified gravity cosmological perturbations

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帕克菲尔德地区圣安德烈斯断层强度变化的远距离影响因素

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国际地震动态 2009年第11期30卷 36-43页

作者： Taka’aki Taira paul G.silver Fenglin Niu Robert M.Nadeau 左玉玲 Department of Terrestrial Magnetism Carnegie Institution of Washington Department of Earth Science Rice UniversityHouston Berkeley Seismological Laboratory University of CaliforniaBerkeley 中国地震局地球物理研究所

断层强度是反映孕震区状态的一个基本特性, 其时间变化会增大或降低最终触发地震事件的可能性. 虽然有人提出断层强度变化能解释各种不同现象, 如地震活动的远距离影响[1], 但实际中还没有现场监测这种重要特性的手段.

关键词：圣安德烈斯断层强度变化远距离帕克菲尔德影响因素地震事件时间变化地震活动

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