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Double-layer model updating for steel-concrete composite beam cable-stayed bridge based on GPS 被引量:1
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作者 刘云 钱振东 《Journal of Southeast University(English Edition)》 EI CAS 2008年第1期80-84,共5页
In order to establish the relationship between the measured dynamic response and the health status of long-span bridges, a double-layer model updating method for steel-concrete composite beam cable-stayed bridges is p... In order to establish the relationship between the measured dynamic response and the health status of long-span bridges, a double-layer model updating method for steel-concrete composite beam cable-stayed bridges is proposed. Measured frequencies are selected as the first-layer reference data, and the mass of the bridge deck, the grid density, the modulus of concrete and the ballast on the side span are modified by using a manual tuning technique. Measured global positioning system (GPS) data is selected as the second-layer reference data, and the degradation of the integral structure stiffness EI of the whole bridge is taken into account for the second-layer model updating by using the finite element iteration algorithm. The Nanpu Bridge in Shanghai is taken as a case to verify the applicability of the proposed model updating method. After the first-layer model updating, the standard deviation of modal frequencies is smaller than 7%. After the second-layer model updating, the error of the deflection of the mid-span is smaller than 10%. The integral structure stiffness of the whole bridge decreases about 20%. The research results show a good agreement between the calculated response and the measured response. 展开更多
关键词 steel-concrete composite beam GPS dynamic respond double-layer model updating
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A Theoretical Model for the Asymmetric Transmission of Powerful Acoustic Wave in Double-Layer Liquids 被引量:2
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作者 王寻 陈伟中 +1 位作者 王奇 梁金福 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第8期88-91,共4页
A theoretical model which couples the oscillation of cavitation bubbles with the equation of an acoustic wave is utilized to describe the sound fields in double-layer liquids, which can be used to realize the asymmetr... A theoretical model which couples the oscillation of cavitation bubbles with the equation of an acoustic wave is utilized to describe the sound fields in double-layer liquids, which can be used to realize the asymmetric transmission of acoustic waves. Numerical simulations show that the asymmetry is related to the properties of the host liquids and the input acoustic wave. Asymmetry can be enhanced if the maximum number density or the ambient radius of the cavitation bubbles in the low cavitation threshold liquid increases. Moreover, the direction of rectification will be reversed if the amplitude of the input acoustic wave becomes high enough. 展开更多
关键词 A Theoretical model for the Asymmetric Transmission of Powerful Acoustic Wave in double-layer Liquids
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Study on the Manufacturability Evaluation Based on Double-layer Model of Manufacturing Resources
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作者 石旭东 FU +4 位作者 Yili Dai Yong Ma Yulin 《High Technology Letters》 EI CAS 2001年第2期61-65,共5页
Virtual organization is a new production patter and a principal part in advanced manufacturing systems such as agile manufacturing. Manufacturability evaluation is the necessary condition to form the virtual organizat... Virtual organization is a new production patter and a principal part in advanced manufacturing systems such as agile manufacturing. Manufacturability evaluation is the necessary condition to form the virtual organization. A new manufacturability evaluation approach is described in this paper, which is carried out based on every process feature under the double-layer model of manufacturing resources proposed by authors. The manufacturing resources that build up the virtual organization are selected according to the results of manufacturability evaluation. 展开更多
关键词 Manufacturability evaluation double-layer model of manufacturing resources Virtual organization
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A seismic model for crustal structure in North China Craton 被引量:15
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作者 TianYu Zheng YongHong Duan +1 位作者 WeiWei Xu YinShuang Ai 《Earth and Planetary Physics》 2017年第1期26-34,共9页
We present a digital crustal model in North China Craton(NCC). The construction of crustal model is based on digitization of original seismic sounding profiles, and new results of three-dimensional structure images of... We present a digital crustal model in North China Craton(NCC). The construction of crustal model is based on digitization of original seismic sounding profiles, and new results of three-dimensional structure images of receiver functions. The crustal model includes seismic velocity and thickness of crustal layers. The depths to Moho indicate a thinning crust ~30 km in the east areas and a general westward deepening to more than 40 km in the west. The P wave velocity varies from 2.0 to 5.6 km/s in the sedimentary cover,from 5.8 to 6.4 km/s in the upper crust, and from 6.5 to 7.0 km/s in the lower crust. By analyzing regional trends in crustal structure and links to tectonic evolution illustrated by typical profiles, we conclude that:(1) The delimited area by the shallowing Moho in the eastern NCC represents the spatial range of the craton destruction. The present structure of the eastern NCC crust retains the tectonic information about craton destruction by extension and magmatism;(2) The tectonic activities of the craton destruction have modified the crustal structure of the convergence boundaries at the northern and southern margin of the NCC;(3) The Ordos terrene may represent a relatively stable tectonic feature in the NCC, but with the tectonic remnant of the continental collision during the assembly of the NCC in the north-east area and the response to the lateral expansion of the Tibetan Plateau during the Cenozoic in the south-west. 展开更多
关键词 crustal velocity model MOHO sedimentary cover tectonic evolution north China Craton
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Numerical investigation of velocity distribution of turbulent flow through vertically double-layered vegetation 被引量:5
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作者 Naveed Anjum Norio Tanaka 《Water Science and Engineering》 EI CAS CSCD 2019年第4期319-329,共11页
The velocity structures of flow through vertically double-layered vegetation(VDLV)as well as single-layered rigid vegetation(SLV)were investigated computationally with a three-dimensional(3D)Reynolds stress turbulence... The velocity structures of flow through vertically double-layered vegetation(VDLV)as well as single-layered rigid vegetation(SLV)were investigated computationally with a three-dimensional(3D)Reynolds stress turbulence model,using the computational fluid dynamics(CFD)code FLUENT.The detailed velocity distribution was explored with a varying initial Froude number(Fr),with consideration of the steady subcritical flow conditions of an inland tsunami.In VDLV flows,the numerical model successfully captured the inflection point in the profiles of mean streamwise velocities in the mixing-layer region around the top of short submerged vegetation.An upward and downward movement of flow occurred at the positions located just behind the tall and short vegetation,respectively.Overall,higher streamwise velocities were observed in the upper vegetation layer due to high porosity,with Pr=98%(sparse vegetation,where Pr is the porosity),as compared to those in the lower vegetation layer,which had comparatively low porosity,with Pr=91%(dense vegetation).A rising trend of velocities was found as the flow passed through the vegetation region,followed by a clear sawtooth distribution,as compared to the regions just upstream and downstream of vegetation where the flow was almost uniform.In VDLV flows,a rising trend in the flow resistance was observed with the increase in the initial Froude number,i.e.,Fr?0.67,0.70,and 0.73.However,the flow resistance in the case of SLV was relatively very low.The numerical results also show the flow structures within the vicinity of short and tall vegetation,which are difficult to attain through experimental measurements. 展开更多
关键词 Vertically double-layered vegetation Single-layered rigid vegetation Numerical modeling FLUENT Velocity distribution Turbulent flow
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Five-Stage Model of the Palaeozoic Crustal Evolution in Xinjiang 被引量:1
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作者 LIU Dequan TANG Yanling ZHOU Ruhong 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1998年第4期339-349,共11页
Abstract: The great majority of the Palaeozoic orogenic belts of Central Asia are of the intercontinental type, whose evolution always follows a five-stage model, i.e. the basal continental crust-extensional transitio... Abstract: The great majority of the Palaeozoic orogenic belts of Central Asia are of the intercontinental type, whose evolution always follows a five-stage model, i.e. the basal continental crust-extensional transitional crust-oceanic crust-convergent transitional crust-new continental crust model. The stage for the extensional transitional crust is a pretty long, independent and inevitable phase. The dismembering mechanism of the basal continental crust becoming an extensional continental crust is delineated by the simple shear model put forward by Wernike (1981). The continental margins on the sides of a gently dipping detachment zone and moving along it are asymmetric: one side is of the nonmagmatic type and the other of the magmatic type with a typical bimodal volcanic formation. In the latter case, however, they were often confused with island arcs. This paper discusses the five-stage process of the crustal evolution of some typical orogenic belts in Xinjiang. 展开更多
关键词 crustal evolution extensional transitional crust oceanic crust new continental crust five-stage model XINJIANG
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A local Martian crustal field model: Targeting the candidate landing site of the 2020 Chinese Mars Rover 被引量:2
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作者 XinZhou Li ZhaoJin Rong +4 位作者 JiaWei Gao Yong Wei Zhen Shi Tao Yu WeiXing Wan 《Earth and Planetary Physics》 CSCD 2020年第4期420-428,共9页
Unlike Earth,Mars lacks a global dipolar magnetic field but is dominated by patches of a remnant crustal magnetic field.In 2021,the Chinese Mars Rover will land on the surface of Mars and measure the surface magnetic ... Unlike Earth,Mars lacks a global dipolar magnetic field but is dominated by patches of a remnant crustal magnetic field.In 2021,the Chinese Mars Rover will land on the surface of Mars and measure the surface magnetic field along a moving path within the possible landing region of 20°W-50°W,20°N-30°N.One scientific target of the Rover is to monitor the variation in surface remnant magnetic fields and reveal the source of the ionospheric current.An accurate local crustal field model is thus considered necessary as a field reference.Here we establish a local crust field model for the candidate landing site based on the joint magnetic field data set from Mars Global Explorer(MGS)and Mars Atmosphere and Volatile Evolution(MAVEN)data combined.The model is composed of 1,296 dipoles,which are set on three layers but at different buried depths.The application of the dipole model to the joint data set allowed us to calculate the optimal parameters of their dipoles.The calculated results demonstrate that our model has less fitting error than two other state-of-the art global crustal field models,which would indicate a more reasonable assessment of the surface crustal field from our model. 展开更多
关键词 MARS remnant crustal field crustal field model dipole sources Chinese Mars mission
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Double-Layer-Optimizing Method of Hybrid Energy Storage Microgrid Based on Improved Grey Wolf Optimization 被引量:2
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作者 Xianjing Zhong Xianbo Sun Yuhan Wu 《Computers, Materials & Continua》 SCIE EI 2023年第8期1599-1619,共21页
To reduce the comprehensive costs of the construction and operation of microgrids and to minimize the power fluctuations caused by randomness and intermittency in distributed generation,a double-layer optimizing confi... To reduce the comprehensive costs of the construction and operation of microgrids and to minimize the power fluctuations caused by randomness and intermittency in distributed generation,a double-layer optimizing configuration method of hybrid energy storage microgrid based on improved grey wolf optimization(IGWO)is proposed.Firstly,building a microgrid system containing a wind-solar power station and electric-hydrogen coupling hybrid energy storage system.Secondly,the minimum comprehensive cost of the construction and operation of the microgrid is taken as the outer objective function,and the minimum peak-to-valley of the microgrid’s daily output is taken as the inner objective function.By iterating through the outer and inner layers,the system improves operational stability while achieving economic configuration.Then,using the energy-self-smoothness of the microgrid as the evaluation index,a double-layer optimizing configuration method of the microgrid is constructed.Finally,to improve the disadvantages of grey wolf optimization(GWO),such as slow convergence in the later period and easy falling into local optima,by introducing the convergence factor nonlinear adjustment strategy and Cauchy mutation operator,an IGWO with excellent global performance is proposed.After testing with the typical test functions,the superiority of IGWO is verified.Next,using IGWO to solve the double-layer model.The case analysis shows that compared to GWO and particle swarm optimization(PSO),the IGWO reduced the comprehensive cost by 15.6%and 18.8%,respectively.Therefore,the proposed double-layer optimizationmethod of capacity configuration ofmicrogrid with wind-solar-hybrid energy storage based on IGWO could effectively improve the independence and stability of the microgrid and significantly reduce the comprehensive cost. 展开更多
关键词 Wind-solar microgrid hybrid energy storage optimization configuration double-layer optimization model IGWO
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Aseismic negative dislocation model and deformation analysis of crustal horizontal movement during 1999--2001 in the northeast margin of Qinghai-Xizang block 被引量:1
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作者 张希 江在森 +2 位作者 王琪 王双绪 张晓亮 《Acta Seismologica Sinica(English Edition)》 CSCD 2003年第4期395-403,共9页
Through numerical simulation for GPS data, aseismic negative dislocation model for crustal horizontal movement during 1999~2001 in the northeast margin of Qinghai-Xizang block is presented, combined with the spatial d... Through numerical simulation for GPS data, aseismic negative dislocation model for crustal horizontal movement during 1999~2001 in the northeast margin of Qinghai-Xizang block is presented, combined with the spatial distribution of apparent strain field in this area, the characteristics of motion and deformation of active blocks and their boundary faults, together with the place and intensity of strain accumulation are analyzed. It is shown that: a) 9 active blocks appeared totally clockwise motion from eastward by north to eastward by south. Obvious sinistral strike-slip and NE-NEE relative compressive motion between the blocks separated by Qilianshan-Haiyuan fault zone was discovered; b) 20 fault segments (most of them showed compression) locked the relative motion between blocks to varying degrees, among the total, the mid-east segment of Qilianshan fault (containing the place where it meets Riyueshan-Lajishan fault) and the place where it meets Haiyuan fault and Zhuanglanghe fault, more favored accumulation of strain. Moreover, the region where Riyueshan-Lajishan fault meets north boundary of Qaidam block may have strain accumulation to some degree. c) Obtained magnitude of block velocities and locking of their boundaries were less than relevant results for observation in the period of 1993~1999. 展开更多
关键词 the northeast margin of Qinghai-Xizang block GPS crustal horizontal movement aseismic negative dislocation model apparent strain field
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3-D crustal-scale gravity model of the San Rafael Block and Payenia volcanic province in Mendoza,Argentina
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作者 Daniel Richarte Marianela Lupari +2 位作者 Agustina Pesce Silvina Nacif Mario Gimenez 《Geoscience Frontiers》 SCIE CAS CSCD 2018年第1期239-248,共10页
The San Rafael Block(SRB)is part of one of the main retroarc volcanic provinces in southern Central Andes in Mendoza,Argentina.This block is located in the Andean foothills between the orogenic front and foreland base... The San Rafael Block(SRB)is part of one of the main retroarc volcanic provinces in southern Central Andes in Mendoza,Argentina.This block is located in the Andean foothills between the orogenic front and foreland basement uplifts of late Miocene age.In order to analyze the geochronological evolution of the Quaternary volcanism in the region,several geologic and geophysical studies have been conducted.Nevertheless,the crust,where the SRB is located,has not been well characterized yet.Based on gravimetric and magnetic data,together with isostatic and elastic thickness analyses,we modeled the crustal structure of the area.Information obtained has allowed us to understand the crust where the SRB and the Payenia volcanic province are located.Bouguer anomalies indicate that the SRB presents higher densities to the North of Cerro Nevado and Moho calculations suggest depths for this block between 40 and 50 km.Determinations of elastic thickness would indicate that the crust supporting the San Rafael Block presents values of approximately 10 km,being enough to support the block loading.However,in the Payenia region,elastic thickness values are close to zero due to the regional temperature increase. 展开更多
关键词 SAN Rafael BLOCK Payenia 3-D crustal model Asthenospheric wedge
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Research on the Crustal Velocity Model of the Yunnan Region and Its Application
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作者 Yang Jingqiong Yang Zhousheng Zhang Huiyuan 《Earthquake Research in China》 CSCD 2018年第4期510-520,共11页
This paper selects the records of 7,412 earthquakes,each recorded by more than 10 stations in Yunnan between 2009 and 2014 to acquire the traveltime curves.Meanwhile,for improving precision,linear analysis,reduced tra... This paper selects the records of 7,412 earthquakes,each recorded by more than 10 stations in Yunnan between 2009 and 2014 to acquire the traveltime curves.Meanwhile,for improving precision,linear analysis,reduced traveltime curve and interval stability analysis are conducted focusing on the records of 83 earthquakes with M_L≥3.0 recorded each by≥80%of the stations,and by combining predecessors'research results,the initial crustal velocity model of the study area is obtained.By selecting 200 earthquakes with M≥3.0 occurring in Yunnan between 2010 and 2014,using the Hyposat batch location processing method to iterate the initial velocity model,and performing fitting to S waves layered velocity structure,we obtain the crustal velocity model for the Yunnan region,namely,the 2015 Yunnan model,with:v_(P1)=6.01km/s,v_(P2)=6.60km/s,v_(Pn)=7.89km/s,H_1=20km,H_2=21km,v_(S1)=3.52km/s,v_(S2)=3.86km/s,v_(Sn)=4.43km/s.Analysis on earthquake relocations based on the new model shows that most earthquakes occurring in Yunnan are at a depth of 10km-20km of the upper crust.The March 10,2011 M_S5.8Yingjiang and August 3,2014 M_S6.5 Ludian earthquakes are relocated,and the focal depths determined with the new model are respectively close to the precise positioning result and hypocentral distance to the strong motion stations at the epicenters,indicating that the new one-dimensional velocity model can better reflect the average velocity structure of the study area. 展开更多
关键词 The YUNNAN area crustal VELOCITY model EARTHQUAKE LOCATION
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GEODYNAMICAL MODELING OF CRUSTAL DEFORMATION OF THE NORTH CHINA BLOCK 被引量:1
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作者 LIN Ge, ZHANG Yan hua, GUO Feng, WANG Yue jun and FAN Wei ming (Changsha Institute of Geotectonics, Chinese Academy of Sciences, Changsha 410013, China) 《Geotectonica et Metallogenia》 2001年第1期67-68,共2页
The North China block,the western portion of the Sino- Korean Craton,is rounded byYanshanian in the north and Qinling- Dabie orogenic belts in the south.The widespread de-velopment of extensional basins in thisblock i... The North China block,the western portion of the Sino- Korean Craton,is rounded byYanshanian in the north and Qinling- Dabie orogenic belts in the south.The widespread de-velopment of extensional basins in thisblock indicates horizontal extension or continued thin-ning of a previousely thickened,unstable lithosphere throughout the Mesozoic.In this pa-per,we attempt to simulate numerically the geodynamical process of the basin formation byusing the mountain- basin evolution system.We assume thatthe formation of numeroussedi-mentary basins in the North China block is the resultofthe crustal extension,which destruc-ts rapidly the previously thickened crust.The gravitational collapse of the thickened crust ispossibly triggered by the re- orientation of the far- field stress regime,or the relaxation of theboundary resistantstress. 展开更多
关键词 GEODYNAMICAL modelING OF crustal DEFORMATION OF THE NORTH CHINA BLOCK
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Wet Permeability Characteristics of Double-layer Knitted Fabrics
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作者 王其 奚柏君 《Journal of Donghua University(English Edition)》 EI CAS 2007年第4期554-555,559,共3页
In order to solve the problem that sweat flows back into the internal layer from the external layer in double-layer knits, a fabric structure model is set up and the conditions that keep the sweat from flowing back in... In order to solve the problem that sweat flows back into the internal layer from the external layer in double-layer knits, a fabric structure model is set up and the conditions that keep the sweat from flowing back into the internal layer from the external layer are presented. It can be used to improve the design of the double-layer knits theoretically. 展开更多
关键词 double-layer knit wet permeability model CONDITION
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The simulation analysis of 3D crustal modeling with Virtual Reality
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作者 Mingyu Ma 《Earthquake Research Advances》 CSCD 2021年第S01期16-17,共2页
This study is to combine geological analysis and processing methods with virtual reality.establishing a modeling to greatly improved the reliability and accuracy of geological description and discrimination in Traim B... This study is to combine geological analysis and processing methods with virtual reality.establishing a modeling to greatly improved the reliability and accuracy of geological description and discrimination in Traim Basin.To improve the accuracy of oil and gas exploration. 展开更多
关键词 3D crustal modeling virtual reality Traim Basin
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Errors Involved in the Taylor's Model for the Crustal Composition and Evolution──An Analysis of Their Causers
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作者 陈衍景 秦善 赵永超 《Chinese Journal Of Geochemistry》 EI CAS 1997年第1期53-61,共9页
It is suggested in this paper that the famous Taylor’s model for the compdrition and evolution of the continental crust consists of three closely related key links. These links include an assumption that the surficia... It is suggested in this paper that the famous Taylor’s model for the compdrition and evolution of the continental crust consists of three closely related key links. These links include an assumption that the surficial environment has no effect on the sedimentary REE patterns and the REE patterns in shales can reflect the composition of their provenancel a discovery about the discrepancy of sedimentary REE patterns between Archean and Proterozoic, and a deduc-tion that there was a global scale K-granitoid event at the end of the Archean. Based on a de-tailed discussion, this paper substantially negates the rationality of the Taylor’s model and ar-gues that its three critical links be three great errors indeed. Moreover, some other deficiencies or problems it confronts are described in this paper. The authors suggest that what led to the errors involved in the Taylor’s model is its wrongly neglecting the effect of the sedimentary en-vironment on the chemical composition of sediments, and that the environment should be an important factor affecting the distribution patterns of trace elements in the sediments. 展开更多
关键词 泰勒模型 沉积物 稀土元素 地壳成分 示踪元素
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Study on the Crustal Velocity Model of Xinjiang and Its Subareas
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作者 Chen Xiangjun Shangguan Wenming +4 位作者 Song Xiuqing Wang Jun Liu Shuangqing Miao Fajun Zhu Yuanqing 《Earthquake Research in China》 2014年第4期436-447,共12页
In this paper,we firstly analyze the "3,400 travel time table "used for a long time in Xinjiang Seismological Network to obtain the velocity structure models in accord with the table by fitting. Then we fit ... In this paper,we firstly analyze the "3,400 travel time table "used for a long time in Xinjiang Seismological Network to obtain the velocity structure models in accord with the table by fitting. Then we fit the velocity of all seismic phases recorded in Xinjiang region in January 2009 ~ December 2013. Simulation analysis is done on the reliability and stability of the velocities,and a concept is proposed for building subarea crustal velocity models according to partitioning of seismic cluster regions. The crustal velocity model suitable for the Yutian area is fitted with the data of all phases of seismic events within a radius of 1°around the 2014 Yutian M_S7.3 earthquake since January 2009,and the model is applied to the relocation of the Yutian M_S7.3 earthquake and determination of focal depths of the earthquake sequence. 展开更多
关键词 3 400 travel time table Subarea crustal velocity model Yutian Ms7.3earthquake
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Surface seasonal mass changes and vertical crustal deformation in North China from GPS and GRACE measurements 被引量:6
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作者 Shuya Li Wenbin Shen +1 位作者 Yuanjin Pan Tengxu Zhang 《Geodesy and Geodynamics》 2020年第1期46-55,共10页
The Earth is an elastic body,and the surface mass loading changes will lead to elastic loading deformation on the surface of the Earth.In this study,we investigated the surface seasonal mass changes and vertical crust... The Earth is an elastic body,and the surface mass loading changes will lead to elastic loading deformation on the surface of the Earth.In this study,we investigated the surface seasonal mass changes and vertical crustal deformation in North China using the data obtained by the techniques of the Global Positioning System(GPS),Gravity Recovery and Climate Experiment(GRACE)and Surface Loading Models(SLMs).The seasonal annual signal and semi-annual signal obtained by the three techniques show strong correlations.The average value of the weighted root-mean-square(WRMS)of the all 30 sites is 58%after deducting the GRACE-obtained vertical deformation from the GPS-derived vertical deformation.However,the consistency of results between GPS and SLMs is not so good,with a 31%mean WRMS reduction,due to the fact that the global SLMs perform not well in North China.The GRACEmeasured long-term trend is deducted from the GPS-obtained vertical rates to reveal the crustal displacement caused by the underground factors such as tectonic movement and groundwater in North China.The results show that the rates of stations HECX and TJBH are very large,more than 10 mm/yr,which suggests that the surface subsidence is caused by excessive exploitation of groundwater. 展开更多
关键词 Continuous GPS MEASUREMENT GRACE MEASUREMENT SURFACE Loading models SEASONAL mass changes VERTICAL crustal displacement
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Global crustal movement and tectonic plate boundary deformation constrained by the ITRF2008 被引量:4
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作者 Zhu Ze Meng Guojie +2 位作者 Su Xiaoning Wu Jicang Li Jean Xiaojing 《Geodesy and Geodynamics》 2012年第3期40-45,共6页
On the basis of the newly released International Terrestrial Reference Frame(ITRF2008) by the International Earth Rotation Service (IERS), a new global plate model ITRF2008 plate for the major plates is establishe... On the basis of the newly released International Terrestrial Reference Frame(ITRF2008) by the International Earth Rotation Service (IERS), a new global plate model ITRF2008 plate for the major plates is established. This ITRF2008-derived model is analyzed in comparison with NNR-NUVEL1A model, which is mainly based on geological and geophysical data. The Eurasia and Paeifi6 plates display obvious differences in terms of the velocity fields derived from the two plate motion models. Plate acceleration is also introduced to characterize the differences of the two velocity fields which obtained from ITRF2008-plate and NNR-NUVEL1A models for major individual plates. The results show that the Africa, South America and Eurasia plates are undergoing acceleration, while the North America and Australia plates are in the state of deceleration motion 展开更多
关键词 ITRF2008 crustal movement global plate model plate acceleration
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Multi-quadric Equations Interpolation and Its Applications to the Establishment of Crustal Movement Speed Field 被引量:4
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作者 YAO Yibin LIU Jingnan SHI Chuang TAO Benzao 《Geo-Spatial Information Science》 2002年第2期1-5,共5页
In this paper,multi_quadric equations interpolation is used to establish a widely covered and valuable speed field model,with which the crustal movement image is obtained.
关键词 multi_quadric equations interpolation speed field model crustal movement pattern
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How does the elevation changing response to crustal thickening process in the central Tibetan Plateau since 120 Ma? 被引量:5
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作者 Zhong-bao Zhao Chao Li Xu-xuan Ma 《China Geology》 2021年第1期32-43,共12页
When and how the Tibetan Plateau formed and maintained its thick crust and high elevation on Earth is continuing debated.Specifically,the coupling relationship between crustal thickening and corresponding paleoelevati... When and how the Tibetan Plateau formed and maintained its thick crust and high elevation on Earth is continuing debated.Specifically,the coupling relationship between crustal thickening and corresponding paleoelevation changing has not been well studied.The dominant factors in crustal thickness changing are crustal shortening,magmatic input and surface erosion rates.Crustal thickness change and corresponding paleoelevation variation with time were further linked by an isostatic equation in this study.Since 120 Ma crustal shortening,magmatic input and surface erosion rates data from the central Tibetan Plateau are took as input parameters.By using a one-dimensional isostasy model,the authors captured the first-order relationship between crustal thickening and historical elevation responses over the central Tibetan Plateau,including the Qiangtang and Lhasa terranes.Based on the modeling results,the authors primarily concluded that the Qiangtang terrane crust gradually thickened to ca.63 km at ca.40 Ma,mainly due to tectonic shortening and minor magmatic input combined with a slow erosion rate.However,the Lhasa terrane crust thickened by a combination of tectonic shortening,extensive magmatic input and probably Indian plate underthrusting,which thickened the Lhasa crust over 75 km since 25 Ma.Moreover,a longstanding elevation>4000 m was strongly coupled with a thickened crust since about 35 Ma in the central Tibetan Plateau. 展开更多
关键词 crustal thickness PALEOELEVATION Isostatic modeling Qiangtang terrane Lhasa terrane Tibetan Plateau China
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