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Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Frontiers of Structural and Civil Engineering Pages 915-934 doi: 10.1007/s11709-023-0907-8

Abstract: A fictitious soil pile (FSP) model is developed to simulate the behavior of pipe piles with soil plugsThe developed model simulates the base soil with a fictitious hollow pile fully filled with a soil plugand soil plug is considered.The motions of the pile−soil system are solved by discretizing them into spring-mass model based on theFinally, the effective length of the FSP is proposed to approximate the affected soil zone below the

Keywords： fictitious soil pile soil plug pipe piles high-strain dynamic analysis one-dimensional wave theory

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Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1, Pages 22-29 doi: 10.1007/s11709-016-0314-5

Abstract: plug.plug.plug.Besides, nearly 90% of the plug resistance is provided by the bottom half portion of the soil column.The soil-pile friction coefficient has a significant effect on the magnitude of plug resistance, with

Keywords： open-ended pipe pile soil plug DEM base capacity

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Organic and inorganic phosphorus uptake by bacteria in a plug-flow microcosm

Jinbo ZHAO, Xuehua LIU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2, Pages 173-184 doi: 10.1007/s11783-013-0494-3

Abstract: Phosphorus (P) is a vital nutrient for sustaining natural water productivity. Both particulate and dissolved forms of organic and inorganic P are potentially important sources of bioavailable P for primary and secondary producers. A microcosm system to imitate the bacterial community in Plym river sediment and pore water is described and bacterial uptake rates for inorganic and organic phosphorus are presented in this paper. The aim of this study was to investigate the uptake of two organic phosphorus compounds (phytic acid and D-glucose-6-phosphate) by freshwater bacteria. The bioreactors comprise glass columns packed with two types of small glass beads on which bacterial biofilm can develop. The glass beads with different porosity were introduced to simulate River SPM. The selected P compounds spiked into the inflow of the microcosm, and measured the step change of P concentration in the outflow to investigate the behavior of bacterial uptake of nutrients. The results showed that organic phosphorus was converted into inorganic phosphorus but the conversion rate depended on the type of phosphorus species. One experiment suggested that phytic acid (refractory) could displace phosphate from the biofilm surface; the other experiment showed that D-glucose-6-phosphate (labile) could be hydrolysed and utilized easily by the bacteria. The results also suggested that bacteria might break down the C-P bonds to utilize the carbon. Further experiments should investigate the effect of varying the C:N:P ratio in the microcosm system to determine which nutrient limits bacteria uptake.

Keywords： organic phosphorus bacteria uptake

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Full lifetime cost analysis of battery, plug-in hybrid and FCEVs in China in the near future

Zhihua CAI, Xunmin OU, Qian ZHANG, Xiliang ZHANG

Frontiers in Energy 2012, Volume 6, Issue 2, Pages 107-111 doi: 10.1007/s11708-012-0182-1

Abstract: This paper analyzes the full lifetime cost of battery electric vehicles (BEVs), plug-in hybrid electric

Keywords： electric vehicle (EV) life time cost China

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state-of-charge trajectory estimation using upcoming route information preview and neural networks for plug-in

Ahmad MOZAFFARI,Mahyar VAJEDI,Nasser L. AZAD

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2, Pages 154-167 doi: 10.1007/s11465-015-0336-z

Abstract: which can be used for the real-time estimation of optimum battery state-of-charge (SOC) trajectory in plug-in

Keywords： trip information preview intelligent transportation state-of-charge trajectory builder immune systems artificial neural network

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Smart product design for automotive systems

A. Galip ULSOY

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 1, Pages 102-112 doi: 10.1007/s11465-019-0527-0

Abstract: as applications of the method to a variable-cam-timing engine, and to enable battery swapping in a plug-in

Keywords： control co-design component swapping modularity active suspensions variable camshaft timing engine plug-in

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Assessment of glass fiber-reinforced polyester pipe powder in soil improvement

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 742-753 doi: 10.1007/s11709-021-0732-x

Abstract: Then, using the optimum PP addition, the bearing capacity of the soil was estimated through a seriesThe bearing capacity of sandy soil was improved by up to 30.7%.The ratio of the depth of the PP-reinforced soil to the diameter of the foundation model (H/D) of 1.25 could sufficiently strengthen sandy soil when the optimum PP ratio was used.capacity can be attributed to the chopped fibers in the PP and their multiaxial distribution in the soil

Keywords： shallow foundation sandy soil bearing capacity soil improvement pipe powder

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Electromagnetic induction mapping at varied soil moisture reveals field-scale soil textural patterns

Hiruy ABDU, David A. ROBINSON, Janis BOETTINGER, Scott B. JONES

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2, Pages 135-145 doi: 10.15302/J-FASE-2017143

Abstract: Knowledge of the spatial distribution of soil textural properties is important for determining soil moisturestorage and soil hydraulic transport properties.electromagnetic induction (EMI) mapping in low apparent electrical conductivity (EC ) soils at varying soilwater contents to capture time invariant properties such as soil texture.m × 50 m field included a subsurface gravelly patch in an otherwise homogeneous silt-loam alluvial soil

Keywords： soil electrical conductivity soil texture mapping temporal stability analysis

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SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 2, Pages 248-261 doi: 10.15302/J-FASE-2023499

Abstract:

● Establishment of a rapid tool for monitoring soil carbon sequestration

Keywords： 4 per 1000 initiative carbon sequestration climate action farmer fields SDG13 soil organic carbon soil testing

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Adsorption behavior of antibiotic in soil environment: a critical review

Shiliang WANG,Hui WANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4, Pages 565-574 doi: 10.1007/s11783-015-0801-2

Abstract: direct and indirect emissions such as excrements, sewage irrigation, and sludge compost and enter the soiland impact negatively the natural ecosystem of soil.process has decisive role for the environmental behaviors and the ultimate fates of antibiotics in soilIn addition, factors of soil environment such as the pH, ionic strength, metal ions, and organic matterReview about adsorption of antibiotics on soil can provide a fresh insight into understanding the antibiotic-soil

Keywords： adsorption antibiotics environment factors soil

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A simplified method for the determination of vertically loaded pile-soil interface parameters in layeredsoil based on FLAC

Jiu-jiang WU,Yan LI,Qian-gong CHENG,Hua WEN,Xin LIANG

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1, Pages 103-111 doi: 10.1007/s11709-015-0328-4

Abstract: The numerical analysis of pile-soil interaction commonly requires a lot of trial works to determine theThen, a simplified method for the determination of pile-soil interface parameters in layered soil is

Keywords： determination of interface parameters pile-soil interaction FLAC^3D sensitivity analysis layeredsoil

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Soil-water interaction in unsaturated expansive soil slopes

ZHAN Liangtong

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 198-204 doi: 10.1007/s11709-007-0023-1

Abstract: The intensive soil-water interaction in unsaturated expansive soil is one of the major reasons for slopeIn this paper, the soil-water interaction is investigated with the full-scale field inspection of rainwaterIt is demonstrated that the soil-water interaction induced by seasonal wetting-drying cycles is veryIn addition, the abundant cracks in the expansive soil play an important role in the soil-water interactionThe seasonal wetting-drying cycles tend to result in a down-slope creeping of the shallow soil layer,

Keywords： strength intensive soil-water comprehensive Infiltration wetting-induced softening

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Remediation of arsenic contaminated soil by sulfidated zero-valent iron

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1377-z

Abstract:

• Sulfidation significantly enhanced As(V) immobilization in soil by

Keywords： Soil As(V) Sulfidation Zero-valent iron Magnetic separation

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INTERCROPPING SUSTAINABLY INCREASES YIELDS AND SOIL FERTILITY

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4, Pages 659-661 doi: 10.15302/J-FASE-2021418

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A review of soil nematodes as biological indicators for the assessment of soil health

Qiaofang LU, Tongtong LIU, Nanqi WANG, Zhechao DOU, Kunguang WANG, Yuanmei ZUO

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 3, Pages 275-281 doi: 10.15302/J-FASE-2020327

Abstract: Soil health is the capacity of soil to function within ecological boundaries to sustain productivity,Soil nematode communities are useful biological indicators of soil health, with community characteristicsThe community size, complexity and structure reflect the condition of the soil., with changes in soil nematode communities reflecting soil disturbance.of these advantages soil nematodes are increasingly being used as biological indicators of soil health

Keywords： biological indicators community characteristics soil health soil nematodes