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Initial life of corner fine cracks on the P60 rails

Shi Rong,Fan Zhiyi,He Yuelei

Strategic Study of CAE 2008, Volume 10, Issue 8, Pages 65-68

Abstract: depth expanding speed rate dh/dN breaks.The times of fatigue loads at turn over point is defined as the initiallife of corner fine cracks.

Keywords： rail corner fine cracks fatigue cracks crack depth expanding speed initial life

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Effect of mulching with maize straw on water infiltration and soil loss at different initial soil moistures

Yifu ZHANG,Hongwen LI,Jin HE,Qingjie WANG,Ying CHEN,Wanzhi CHEN,Shaochun MA

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 2, Pages 161-170 doi: 10.15302/J-FASE-2016104

Abstract: study investigated the effect of straw mulching on water infiltration and soil loss under different initialIncreasing initial SWC can decrease soil infiltration and increase soil loss.During an 80 mm rainfall event (80 mm·h for 60 min), 8%, 12% and 16% initial SWC treatments decreased42.5% and 58.1%, and increased total sediment yield by 44, 146 and 315 g, respectively, compared to 4% initialFor all initial SWC treatments, straw mulching of 30% or more significantly enhanced water infiltration

Keywords： infiltration initial soil water content rainfall simulation soil loss straw mulching

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Evacuation strategies for vertical ship lift during initial fire: Integrated application of stairs and

Shu CHEN, Menghan SHANG, Jianping WANG

Frontiers of Engineering Management 2021, Volume 8, Issue 1, Pages 135-147 doi: 10.1007/s42524-020-0125-1

Abstract: The proposed model can provide a theoretical reference for evacuation research during initial fire events

Keywords： vertical ship lift initial fire fire evacuation numerical simulation stair elevator

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Initial stiffness and moment resistance of reinforced joint with end-plate connection

Sufang WANG, Yiyi CHEN,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4, Pages 345-351 doi: 10.1007/s11709-009-0054-x

Abstract: The joint is divided into some basic components, and the initial stiffness of each component is obtainedEspecially, the initial stiffness of reinforced components is drawn by theoretical model and finite elementThe initial stiffness of reinforced joint can be obtained by assembling the initial stiffness of eachcomparison with the results of finite element calculation, it is verified that the method to calculate the initial

Keywords： steel structure end-plate connection backing plate supplementary web plate initial stiffness moment resistance

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Periodically varied initial offset boosting behaviors in a memristive system with cosine memductance Regular Papers

Mo CHEN, Xue REN, Hua-gan WU, Quan XU, Bo-cheng BAO

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 12, Pages 1706-1716 doi: 10.1631/FITEE.1900360

Abstract: Nonlinear and one-dimensional initial offset boosting behaviors, which are triggered by not only theinitial condition of the memristor but also other two initial conditions, are numerically uncovered.

Keywords： Initial offset boosting Memristive system Memductance Line equilibrium set

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Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection

Siu-Lai CHAN, Yaopeng LIU, Andy LEE,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 376-382 doi: 10.1007/s11709-010-0086-2

Abstract: The stability function with initial curvature is used in place of the cubic function, which is only accurate

Keywords： tension system glass wall nonlinear analysis pre-tensioning second-order analysis

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Whole-life Thinking and Engineering the Future

Roger Flanagan

Frontiers of Engineering Management 2014, Volume 1, Issue 3, Pages 290-296 doi: 10.15302/J-FEM-2014040

Abstract: Whole-life thinking for engineers working on the built environment has become more important in a fastWhole-life thinking is not new, every project attempts to balance the initial capital cost with the operatingSystems thinking provides one approach to developing a more robust whole-life approach.New approaches are needed to produce more reliable whole-life predictions.Best value, rather than lowest cost, can be achieved by using whole-life appraisal as a part of the design

Keywords： whole-life thinking systems thinking complexity chaos risk management through life

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Influence of initial curing conditions and exposure environments on chloride migration in concrete using

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 348-353 doi: 10.1007/s11709-010-0077-3

Abstract: To investigate the influence of initial curing conditions and exposure environments on chloride ions&The results indicated that the initial curing conditions and the wet-dry interval of external environmentsThe co-effects of the initial curing condition and following exposure environment should be taken into

Keywords： durability effective diffusion coefficient steady-state migration test

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Service Life Supervision for Individual Aircraft Structural System Based on Aircraft Structural Life

He Yuting

Strategic Study of CAE 2006, Volume 8, Issue 6, Pages 23-27

Abstract:

Based on the analysis of the aircraft structural life envelope (ASLE) under the baseline operationalconditions, an approach of establishment of aircraft structural life envelope (ASLE) under nonbaselineThe method of service life supervision for individual aircraft structural system(SLSFIASS) under nonbaseline

Keywords： aircraft structure life envelope service life supervision time between overhauls

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Comparison on End-of-Life strategies of WEEE in China based on LCA

Bin Lu, Xiaolong Song, Jianxin Yang, Dong Yang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0994-7

Abstract: It becomes an urgent issue to develop and adopt an effective End-of-Life (EoL) strategy for EEE in orderEoL strategies for EEE in China need to be evaluated in environment and resources aspects from the lifeLife Cycle Assessment (LCA) is applied to assess the environmental impacts of different EoL scenarios

Keywords： End-of-Life Waste electrical and electronic equipment Life cycle assessment Reuse

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Bayes estimation of residual life by fusing multisource information

Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO

Frontiers of Engineering Management 2018, Volume 5, Issue 4, Pages 524-532 doi: 10.15302/J-FEM-2018034

Abstract:

Residual life estimation is essential for reliability engineering.Traditional methods may experience difficulties in estimating the residual life of products with highreliability, long life, and small sample.In this study, a Bayes model is proposed to estimate the residual life of products by fusing expert knowledgeeffectiveness and practicability of the proposed method are validated by comparing it with residual life

Keywords： residual life estimation Bayes model linear Wiener process

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The performance of nitrate-reducing Fe(II) oxidation processes under variable initial Fe/N ratios: The

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1366-2

Abstract:

•Bacterially-mediated coupled N and Fe processes examined in incubation experiments.

Keywords： Denitrification N₂O emission Fe(II) oxidation Fe/N ratio Fe minerals

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A comparison of production system life cycle models

Rajesh ATTRI, Sandeep GROVER

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3, Pages 305-311 doi: 10.1007/s11465-012-0332-5

Abstract: Hence, analyzing different life cycle models of the production system is necessary.In this paper, different life cycle models of the production system are compared to evaluate the distinctiveFurthermore, the difference between product life cycle and production life cycle is summarized, and theeffect of product life cycle on production life cycle is explained.Finally, a production system life cycle model, along with key activities to be performed in each stage

Keywords： production system life cycle model product

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General framework for bridge life cycle design

Junhai MA, Airong CHEN, Jun HE

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 50-56 doi: 10.1007/s11709-009-0004-7

Abstract: Based on a detailed illustration for bridge life cycle design which comprises the processes of servicelife design, aesthetics design, performance design, environmental and ecological design, inspection,maintenance and repair design as well as cost analysis, this paper presented a general framework for bridge life

Keywords： bridge whole life design design phase design process general framework

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Chemically triggered life control of “smart” hydrogels through click and declick reactions

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 9, Pages 1399-1406 doi: 10.1007/s11705-022-2149-z

Abstract: The degradation of polymeric materials is recognized as one of the goals to be fulfilled for the sustainable economy. In this study, a novel methodology was presented to synthesize multiple highly cross-linked polymers (i.e., hydrogels) through amine–thiol scrambling under mild conditions. Amine-terminated poly(ethylene glycol) (PEG-NH₂) was reacted with the representative conjugate acceptors to synthesize hydrogels in organic and aqueous solutions, respectively. The materials above exhibited high water-swelling properties, distributed porous structures, as well as prominent mechanical strengths. It is noteworthy that the mentioned hydrogels could be degraded efficiently in hours to release the original coupling partner, which were induced by ethylene diamine at ambient temperature through amine-amine metathesis. The recovered PEG-NH₂ reagent could be employed again to regenerate hydrogels. Due to the multiple architectures and functions in polymeric synthesis, degradation and regeneration, a new generation of “smart” materials is revealed.

Keywords： hydrogels degradation synthesis regeneration