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High Resolution Earth's Gravity Field Models DQM99

Shi Pan,xia Zheren,sun Zhongmiao,li Yingchun

Strategic Study of CAE 1999, Volume 1, Issue 3,   Pages 51-55

Abstract:

The harmonic series formula of the Earth´s disturbing potential is the most extensive applicableexpression for the Earth´s gravity field model.Since the gravity data density and precision are very different everywhere, the model accuracy isn´and regional 15´×15´ △g and 5´×5´ △g, the improved models DQM99Aand DQM99B to degree 720, DQM99C and DQM99D to degree 2 160 are developed.

Keywords： Earth's gravity field model DQM99     Earth's figure     geopotential coefficient model    

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Application of Satellite Gravity Gradiometry Data to the Refinement of the Earth’s Gravity Field

Ning Jinsheng,Luo Zhicai,Chen Yongqi

Strategic Study of CAE 2002, Volume 4, Issue 7,   Pages 23-28

Abstract: physical geodesy is to determine the geoid with centimeter level and to develop the ultra high global earth’s gravity field model，and for this purpose satellite gravity gradiometry is one of the most promisingThis paper first comments on the main progress of satellite gravity gradiometry, and then discusses sometheories and methods for refining the earth´s gravity field using satellite gravity gradiometry

Keywords： satellite gravity gradiometry     satellite gravity gradiometry boundary value problem     earth's gravity fieldmodel     geoid    

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A High-Resolution Earth’s Gravity Field Model SGG-UGM-2 from GOCE, GRACE, Satellite Altimetry, and EGM2008 Article

Wei Liang, Jiancheng Li, Xinyu Xu, Shengjun Zhang, Yongqi Zhao

Engineering 2020, Volume 6, Issue 8,   Pages 860-878 doi: 10.1016/j.eng.2020.05.008

Abstract:

This paper focuses on estimating a new high-resolution Earth’s gravity field model named SGG-UGM-2 from satellite gravimetry, satellite altimetry, and Earth Gravitational Model 2008 (EGM2008)-derived-2 up to degree 2190 and order 2159 by combining the observations of the Gravity Field and Steady-Stategravity data.model of the earth by new techniques (EIGEN)-6C4, GECO, EGM2008, and SGG-UGM-1 (the predecessor of SGG-UGM

Keywords： Gravity field model     GOCE     GRACE     Satellite altimetry     Block-diagonal least-squares    

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Research on the data processing methods of airborne vector gravimetry using SINS/GNSS

Ning Jinsheng

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 4-13

Abstract: vector gravimetry is an advanced and efficient technology to determine high frequency information of earth’s gravity field in the future，and is a complement to ground gravimetry，marine gravimetry and satellite

Keywords： airborne vector gravimetry     SINS/GNSS data fusion     earth gravity field     geoid    

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quantification of stability and damage detection parameters of coupled hydrodynamic-ground motion in concrete gravity

Nazim Abdul NARIMAN, Tom LAHMER, Peyman KARAMPOUR

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 303-323 doi: 10.1007/s11709-018-0462-x

Abstract: models were constructed and uncertainty quantification process was adopted by the support of Sobol’s

Keywords： massed foundation     hydrodynamic pressure     Box-Behnken method     meta model     Sobol’s sensitivity indices    

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Field testing of geosynthetic-reinforced and column-supported earth platforms constructed on soft soil

Qiangong CHENG,Jiujiang WU,Dongxue ZHANG,Fengping MA

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 124-139 doi: 10.1007/s11709-014-0255-9

Abstract: This paper is focused on the behavior of geosynthetic-reinforced and column-supported (GRCS) earth platformsBy analyzing the data of a 15-month long field monitoring project, the bearing behavior and effectivenessof GRCS earth platforms are discussed in detail.

Keywords： geosynthetic-reinforced and column-supported (GRCS) earth platforms     soft soil     bearing behavior     settlementand deformation     field testing    

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Soil spatial variability impact on the behavior of a reinforced earth wall

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 518-531 doi: 10.1007/s11709-020-0611-x

Abstract: This article presents the soil spatial variability effect on the performance of a reinforced earth wallThe Karhunen-Loève expansion method is used for the discretization of the random field.

Keywords： reinforced earth wall     geosynthetic     random field     spatial variability     Monte Carlo simulation    

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Progress in breeding for resistance to Ug99 and other races of the stem rust fungus in CIMMYT wheat germplasm

HODSON, Julio HUERTA-ESPINO, Mandeep S. RANDHAWA, Ravi P. SINGH

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 3,   Pages 210-224 doi: 10.15302/J-FASE-2019268

Abstract:

Races belonging to the Ug99 (TTKSK) lineage of the wheat stem rust fungus, carrying complex virulencerust monitoring system reflecting increased surveillance efforts has identified 13 races within the Ug99

Keywords： adult plant resistance     black rust     race-specific resistance     Triticum aestivum    

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Deviation correction strategy for the earth pressure balance shield based on shield–soil interactions

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0676-4

Abstract: decision-making approach for the deviation correction trajectory and posture rectification load for an earthA calculation model of posture rectification load of an EPB shield is developed by considering the interactionsFinally, the posture rectifying curves based on the theoretical model are compared with the target ones

Keywords： additional position change     deviation correction trajectory     earth pressure balance shield     mechanicalmodel     posture rectification    

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Deriving Improved Newton's Second Law and the Law of Gravity at One Time with Form of Fractal Formula

Fu Yuhua

Strategic Study of CAE 2003, Volume 5, Issue 6,   Pages 55-58

Abstract:

Newton's second law and the law of gravity are summarized with experimental results.theoretically, according to the law of conservation of energy, the method of deriving improved Newton'ssecond law and the law of gravity at one time with variable dimension fractal method is presented forsuitable for this example with the constant dimension fractal form are as follows： improved law of gravityF = - GMm/r1.99989 , and improved Newton's second law F = ma1.01458.

Keywords： Newton & acute     s second law     the law of gravity     theoretical derivation    

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Digital Earth Model of Multiple Scales and Its Application in Virtulizing Earth

Li Boheng

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 12-15

Abstract:

The digital earth model is composed of three parts： digital frame model, digital elevation model,and digital earth-unit model.earth model and applying and developing modeling information effectively.The five characteristics of virtual earth and the key technologies for building digital earth model areplough land decrease, waterlogging and east-west regional variances, which have influence on China´s

Keywords： digial earth     virtual earth     information    

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Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 299-304 doi: 10.1007/s11709-009-0035-0

Abstract: The similarity law of centrifuge test was developed for the seepage field and stress field of a foundationFinally, a comparative study was conducted on the test results of the pit deformation and the field measurementresults show that the pit deformation regularity of the test is basically identical with that of the fieldmeasurement, and the difference in pit deformation between the test and the field measurement is withinThe centrifuge model test can effectively simulate the displacement response of the ground and retaining

Keywords： foundation pit with confined water     centrifuge model test     seepage-stress coupling field     similarity relation     field measurement     deformation    

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Experimental study on flow-field effect of circular gravity cage

Liu Chao,Guan Changtao,Cui Yong,Zhao Xia,Li Mengjie,Li Zhenzhen,Wang Tengteng

Strategic Study of CAE 2014, Volume 16, Issue 9,   Pages 69-77

Abstract:

In order to understand hydrodynamic characteristics of circular gravitycage in varied flow-field, and obtain both the flow-velocity variations and flow-field distributionmodels(C1,C2,C3,C4) were designed to be measured at specific measurement points at a velocity of 0.068m/s,0.105m/s,0.143m/s,0.182m/s by particle image velocimetry (PIV) technique and acoustic Doppler velocimeter

Keywords： net cage     ADV     PIV     velocity     flow-field distribution    

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Rotating magnetic beacons magnetic field strength size in SAGD

Bing TU, Desheng LI, Enhuai LIN, Bin LUO, Jian HE, Lezhi YE, Jiliang LIU, Yuezhong WANG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 446-449 doi: 10.1007/s11465-010-0113-y

Abstract: Rotation magnetic beacons magnetic field strength is very important to drill parallel horizontal twinwells in steam assisted gravity drainage (SAGD).The magnetic field strength generated by the magnetic material of 1J12, 1J50, and 1J79 is analyzed, respectivelyANSOFT software is used to simulate the magnetic field strength generated by different magnetic materials

Keywords： rotating magnetic beacons     steam assisted gravity drainage (SAGD)     ANSOFT    

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Considerations on China' s Earth Observation Technology——Current Activities and Future Directions

Jiang Jingshan

Strategic Study of CAE 2006, Volume 8, Issue 11,   Pages 19-24

Abstract:

Earth Observation and application is one of the core missions in space technology development.Up to now, over thousands of spacecrafts have been launched, and earth observation satellites occupyThe development over decades shows that earth observation technology has become a strong trend aroundIn China, earth observation Technology started from 1970s.In China, earth observation technology will abide by the principle of “Demand Pulls, Technology

Keywords： China's space activities     earth observation technology     remote sensing     information processing    

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Title Author Date Type Operation

High Resolution Earth's Gravity Field Models DQM99

Shi Pan,xia Zheren,sun Zhongmiao,li Yingchun

Journal Article

Application of Satellite Gravity Gradiometry Data to the Refinement of the Earth’s Gravity Field

Ning Jinsheng,Luo Zhicai,Chen Yongqi

Journal Article

A High-Resolution Earth’s Gravity Field Model SGG-UGM-2 from GOCE, GRACE, Satellite Altimetry, and EGM2008

Wei Liang, Jiancheng Li, Xinyu Xu, Shengjun Zhang, Yongqi Zhao

Journal Article

Research on the data processing methods of airborne vector gravimetry using SINS/GNSS

Ning Jinsheng

Journal Article

quantification of stability and damage detection parameters of coupled hydrodynamic-ground motion in concrete gravity

Nazim Abdul NARIMAN, Tom LAHMER, Peyman KARAMPOUR

Journal Article

Field testing of geosynthetic-reinforced and column-supported earth platforms constructed on soft soil

Qiangong CHENG,Jiujiang WU,Dongxue ZHANG,Fengping MA

Journal Article

Soil spatial variability impact on the behavior of a reinforced earth wall

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Journal Article

Progress in breeding for resistance to Ug99 and other races of the stem rust fungus in CIMMYT wheat germplasm

HODSON, Julio HUERTA-ESPINO, Mandeep S. RANDHAWA, Ravi P. SINGH

Journal Article

Deviation correction strategy for the earth pressure balance shield based on shield–soil interactions

Journal Article

Deriving Improved Newton's Second Law and the Law of Gravity at One Time with Form of Fractal Formula

Fu Yuhua

Journal Article

Digital Earth Model of Multiple Scales and Its Application in Virtulizing Earth

Li Boheng

Journal Article

Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Journal Article

Experimental study on flow-field effect of circular gravity cage

Liu Chao,Guan Changtao,Cui Yong,Zhao Xia,Li Mengjie,Li Zhenzhen,Wang Tengteng

Journal Article

Rotating magnetic beacons magnetic field strength size in SAGD

Bing TU, Desheng LI, Enhuai LIN, Bin LUO, Jian HE, Lezhi YE, Jiliang LIU, Yuezhong WANG

Journal Article

Considerations on China' s Earth Observation Technology——Current Activities and Future Directions

Jiang Jingshan

Journal Article