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Low Earth Orbiter (LEO) Navigation Augmentation: Opportunities and Challenges

Wang Lei, Li Deren, Chen Ruizhi, Fu Wenju, Shen Xin, Jiang Hao

Strategic Study of CAE 2020, Volume 22, Issue 2,   Pages 144-152 doi: 10.15302/J-SSCAE-2020.02.018

Abstract: ’s Beidou satellite navigation system (Beidou system) achieves a primary global coverage, the lowearth orbiter navigation augmentation (LEO-NA) technique becomes a hot research topic, since it can

Keywords： satellite navigation augmentation     low earth orbiter constellation     Beidou system     collaborative development    

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General modeling and optimization technique for real-world earth observation satellite scheduling

Frontiers of Engineering Management   Pages 695-709 doi: 10.1007/s42524-023-0263-3

Abstract: Over the last two decades, many modeling and optimization techniques have been developed for earth observationaddition, a complicatedly constrained real-world benchmark exampled by a four-EOS Chinese commercial constellation

Keywords： earth observation satellite     scheduling     general technique     optimization algorithm     commercial constellation    

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Regeneration of vernacular architecture: new rammed earth houses on the upper reaches of the Yangtze

Jiaping LIU, Rongrong HU, Liu YANG, Runshan WANG,

Frontiers in Energy 2010, Volume 4, Issue 1,   Pages 93-99 doi: 10.1007/s11708-010-0002-4

Abstract: In rural areas of western China, most of the vernacular architectures are made of earth.earth house cannot meet their requirement for higher standard of living.As a result, much more energy will be consumed if industrial building materials are used instead of earthThis paper briefly describes a project about creating a new prototype of earth house for the migrantshouses with the concept of low-energy housing.

Keywords： earth house     low-energy housing     upper reaches of the Yangtze River     passive solar technique    

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Effect of earth reinforcement, soil properties and wall properties on bridge MSE walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1209-1221 doi: 10.1007/s11709-021-0764-2

Abstract: Mechanically stabilized earth (MSE) retaining walls are popular for highway bridge structures.They have precast concrete panels attached to earth reinforcement.The effects of pore pressure, soil cohesion, earth reinforcement type and length, breakage/slippage of

Keywords： mechanically stabilized earth walls     precast concrete panels     backfill soil     finite element modeling     earth reinforcement    

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Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 24-40 doi: 10.1007/s11709-010-0082-6

Abstract: A numerical study is conducted to investigate the dynamic behavior of earth dams.For the latter, the Long Valley (LV) earth dam subjected to the 1980 Mammoth Lake earthquake as a realsoil behavior, strength of the shell materials and dam reservoir condition on the dynamic response of earth

Keywords： earth dam     numerical     nonlinear response     dynamic analysis     earthquake     dam height    

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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 earth

Keywords： additional position change     deviation correction trajectory     earth pressure balance shield     mechanical    

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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 wall

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

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Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1480-1493 doi: 10.1007/s11709-021-0776-y

Abstract: This paper proposes a general analytical method to evaluate the seismic active earth pressure on a retainingthe following steps: i) determination of the total head, ii) upper bound solution of seismic active earththrust, and iii) deduction for the earth pressure distribution.>x,z) relies on the Fourier series expansions, and the expressions of the seismic active earthstudies reveal that insufficient drainage and earthquakes are crucial factors that cause unfavorable earth

Keywords： seismic active earth pressure     partial seepage flow     pore pressure     anisotropy     upper bound theorem    

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Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1584-1594 doi: 10.1007/s11705-022-2189-4

Abstract: The separation of rare earth elements is particularly difficult due to their similar physicochemicalHerein, a novel method based on the large ionic magnetic moment differences of rare earth elements wasquasi-liquid system strategy provides a possibility of the novel, green, and efficient method for rare earth

Keywords： rare earth element     different magnetic moment     magnetic separation     ionic liquid    

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Engineering Innovation and the Development of the BDS-3 Navigation Constellation

Jun Xie, Chengbin Kang

Engineering 2021, Volume 7, Issue 5,   Pages 558-563 doi: 10.1016/j.eng.2021.04.002

Keywords： EngineeringAchievements    

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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.The question of building virtual earth in science mainly includes two sections： building the digitalearth model and applying and developing modeling information effectively.The five characteristics of virtual earth and the key technologies for building digital earth model are

Keywords： digial earth     virtual earth     information    

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Development Strategy of Space Internet Constellation System in China

Li Feng, Yu Hang, Ding Rui, Wang Ningyuan, Wang Yuqi, Zhou Zhicheng

Strategic Study of CAE 2021, Volume 23, Issue 4,   Pages 137-144 doi: 10.15302/J-SSCAE-2021.04.016

Abstract:

The space Internet constellation system is an important component ofHowever, China is still in the preparatory stage of the space Internet constellation system constructionapplication fields, and uncontrollability of network security; therefore, China’s space Internet constellationFacing the opportunities and challenges, we overview the space Internet constellation system developmentand abroad and propose the development ideas, key tasks, and technical routes of the space Internet constellation

Keywords： space Internet constellation     frequency and orbit resource     satellite Internet standards     network security    

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Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post mining: a column study

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1702-4

Abstract:

● Column experiments with an inclined slope were applied to simulate NH4–N transport.

Keywords： Ion-absorbed rare earth     Ammonium nitrogen transport     HYDRUS-2D     Numerical simulation    

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Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Frontiers of Structural and Civil Engineering   Pages 1387-1399 doi: 10.1007/s11709-023-0005-y

Abstract: Soil conditioning is essential for addressing the stratum applicability problem of earth pressure balance

Keywords： EPB shield     bubble–slurry     soil conditioning     stability     permeability    

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Understand and construct Beidou

Xu Qifeng

Strategic Study of CAE 2014, Volume 16, Issue 8,   Pages 26-32

Abstract: adverse conditions of constructing satellite navigation system in our country are analyzed and satellite constellation

Keywords： system     regional augmentationsatellite navigation system     satellite constellation design     regional navigation    

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Title Author Date Type Operation

Low Earth Orbiter (LEO) Navigation Augmentation: Opportunities and Challenges

Wang Lei, Li Deren, Chen Ruizhi, Fu Wenju, Shen Xin, Jiang Hao

Journal Article

General modeling and optimization technique for real-world earth observation satellite scheduling

Journal Article

Regeneration of vernacular architecture: new rammed earth houses on the upper reaches of the Yangtze

Jiaping LIU, Rongrong HU, Liu YANG, Runshan WANG,

Journal Article

Effect of earth reinforcement, soil properties and wall properties on bridge MSE walls

Journal Article

Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Journal Article

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

Journal Article

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

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Journal Article

Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

Journal Article

Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy

Journal Article

Engineering Innovation and the Development of the BDS-3 Navigation Constellation

Jun Xie, Chengbin Kang

Journal Article

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

Li Boheng

Journal Article

Development Strategy of Space Internet Constellation System in China

Li Feng, Yu Hang, Ding Rui, Wang Ningyuan, Wang Yuqi, Zhou Zhicheng

Journal Article

Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post mining: a column study

Journal Article

Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Journal Article

Understand and construct Beidou

Xu Qifeng

Journal Article