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Dynamics simulation of bottom high-sediment sea water movement under waves

Xueyi YOU , Wei LIU , Houpeng XIAO ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 312-315 doi: 10.1007/s11709-009-0037-y

Abstract: Supposing that the high-sediment sea water is a Newtonian fluid, based on Navier-Stokes (N-S) theory,

Keywords： volume of fluid (VOF) method high sediment sea water numerical simulation interface trace Navier-Stokes(N-S) theory

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URANS simulation of the turbulent flow in tight lattice bundle

Yiqi YU, Yanhua YANG

Frontiers in Energy 2011, Volume 5, Issue 4, Pages 404-411 doi: 10.1007/s11708-011-0165-7

Abstract: Unsteady Reynolds averaged Navier Stokes (URANS) is a promising approach to achieve this goal.

Keywords： tight rod bundle flow structure unsteady Reynolds averaged Navier Stokes (URANS)

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Analysis of Calendar Life of Aircraft Structure on Corrosion Environment

Yang Xiaohua,Yao Weixing,Chen Yueliang

Strategic Study of CAE 2002, Volume 4, Issue 6, Pages 33-35

Abstract: On the basis of dynamic S-N curve, traditional nominal stress-method and Miner theory, this paper put

Keywords： aircraft structure calendar life corrosion fatigue S-N curve

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The S-N Curve Fitted by the Least Square Method Considering the Effect of Length of the Confidence Interval

Yang Xiaohua,Jin Ping,Yao Weixing

Strategic Study of CAE 2004, Volume 6, Issue 4, Pages 41-43

Abstract:

The S-N curve is the base of calculating fatigue structural life.The calculating results show that the S-N curve which is gained by the least square method consideringthe effect of length of the confidence interval is more reliable and secure than the S-N curve which

Keywords： confidence interval fatigue life least square method S-N curve

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Goryachkin’s agricultural mechanics

Vera CHINENOVA

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1, Pages 87-94 doi: 10.1007/s11465-016-0378-x

Abstract:

The paper contributes to the development of applied mechanics by establishing a new discipline, namely, agricultural mechanics by academician Vasilii Prohorovich Goryachkin (1868–1935) who was an apprentice of Nikolay Yegorovich Zhukovsky and a graduate of the Moscow University (current known as Moscow State University) and the Imperial Higher Technical School.

Keywords： theory of mechanisms and machines agricultural machinery engineering agricultural mechanics

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Strength reduction factors for structural rubbercrete

Bashar S. MOHAMMED,N. J. AZMI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 3, Pages 270-281 doi: 10.1007/s11709-014-0265-7

Abstract: Many researches have been carried out to study the fresh and hardened properties of concrete containing crumb rubber as replacement to fine aggregate by volume, yet there is no specific guideline has been developed on the mix design of the rubbercrete. The experimental program, which has been developed and reported in this paper, is designed and executed to provide such mix design guidelines. A total of 45 concrete mixes with three different water to cement ratio (0.41, 0.57 and 0.68) were cast and tested for fresh and mechanical properties of rubbercrete such as slump, air content, unit weight, compressive strength, flexural strength, splitting tensile strength and modulus of elasticity. Influence of mix design parameters such as percentage of crumb rubber replacement, cement content, water content, fine aggregate content, and coarse aggregate content were investigated. Three levels of slump value (for conventional concrete mixes) has been selected; low, medium and high slump. In each slump level, water content was kept constant. Equations for the reduction factors (RFs) for compressive strength, flexural strength, splitting tensile strength and modulus of elasticity have been developed. These RFs can be used to design rubbercrete mixes based on the conventional mix (0% crumb rubber content)

Keywords： crumb rubber recycled tire mix design reduction factor strength modulus elasticity

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Three potential benefits of the EU and IMO’s landmark efforts to monitor carbon dioxide emissions from

Shuaian WANG, Lu ZHEN, Harilaos N. PSARAFTIS

Frontiers of Engineering Management 2021, Volume 8, Issue 2, Pages 310-311 doi: 10.1007/s42524-020-0096-2

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Morphological and mechanical characterization of a PMMA/CdS nanocomposite

Vishal MATHUR, Manasvi DIXIT, K.S. RATHORE, N. S. SAXENA, K.B. SHARMA

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2, Pages 258-263 doi: 10.1007/s11705-010-1014-7

Abstract: This study reveals that the glass transition temperature ( ), Young’s modulus, and fracture energy of

Keywords： poly(methyl methacrylate) (PMMA) filler nanoparticles polymer semiconducting nanocomposite tensile properties glass transition temperature

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Decoration of vertically aligned TiO

Heba ALI, N. ISMAIL, M. S. AMIN, Mohamed MEKEWI

Frontiers in Energy 2018, Volume 12, Issue 2, Pages 249-258 doi: 10.1007/s11708-018-0547-1

Abstract: WO decorated photoelectrodes of titanium nanotube arrays (W-oxide TNTAs) were synthesized via a two-step process, namely, electrochemical oxidation of titanium foil and electrodeposition of W-oxide for various interval times of 1, 2, 3, 5, and 20 min to improve the photoelectrochemical performance and the amount of hydrogen generated. The synthesized photoelectrodes were characterized by various characterization techniques. The presence of tungsten in the modified TNTAs was confirmed using energy dispersive X-ray spectroscopy (EDX). Field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscope (HRTEM) proved the deposition of W-oxide as small particles staked up on the surface of the tubes at lower deposition time whereas longer times produced large and aggregate particles to mostly cover the surface of TiO nanotubes. Additionally, the incorporation of WO resulted in a shift of the absorption edge toward visible light as confirmed by UV-Vis diffuse reflectance spectroscopy and a decrease in the estimated band gap energy values hence, modified TNTAs facilitated a more efficient utilization of solar light for water splitting. From the photoelectrochemical measurement data, the optimal photoelectrode produced after 2 min of deposition time improved the photo conversion efficiency and the hydrogen generation by 30% compared to that of the pure TNTA.

Keywords： titanium dioxide nanotube arrays potentiostaticanodization electrodeposition method tungsten oxide photoelectrochemical water splitting

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Cracking evolution behaviors of lightweight materials based on

Luo, S. C. Wu, Y. N. Hu, Y. N. Fu

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4, Pages 461-481 doi: 10.1007/s11465-018-0481-2

Abstract:

Damage accumulation and failure behaviors are crucial concerns during the design and service of a critical component, leading researchers and engineers to thoroughly identifying the crack evolution. Third-generation synchrotron radiation X-ray computed microtomography can be used to detect the inner damage evolution of a large-density material or component. This paper provides a brief review of studying the crack initiation and propagation inside lightweight materials with advanced synchrotron three-dimensional (3D) X-ray imaging, such as aluminum materials. Various damage modes under both static and dynamic loading are elucidated for pure aluminum, aluminum alloy matrix, aluminum alloy metal matrix composite, and aluminum alloy welded joint. For aluminum alloy matrix, metallurgical defects (porosity, void, inclusion, precipitate, etc.) or artificial defects (notch, scratch, pit, etc.) strongly affect the crack initiation and propagation. For aluminum alloy metal matrix composites, the fracture occurs either from the particle debonding or voids at the particle/matrix interface, and the void evolution is closely related with fatigued cycles. For the hybrid laser welded aluminum alloy, fatigue cracks usually initiate from gas pores located at the surface or sub-surface and gradually propagate to a quarter ellipse or a typical semi-ellipse profile.

Keywords： fatigue crack initiation and growth fatigue damage mechanism damage tolerance defect characterization laser welded aluminum alloys

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Arming China's Agriculture With Deng Xiaoping Theory

Liu Gengling

Strategic Study of CAE 2006, Volume 8, Issue 4, Pages 24-27

Abstract:

The paper reviews the developing course of China's agriculture over the past five decades.technology to raise standards of agriculture industries, which are ail belong to Deng Xiaoping'sthought, are the important theories for guiding the sustainable and healthy development of China's

Keywords： China's agriculture Deng Xiaoping theory sustainable development

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Twelve Years of Genome-Wide Association Studies of Human Protein N-Glycosylation Review

Anna Timoshchuk, Sodbo Sharapov, Yurii S. Aulchenko

Engineering 2023, Volume 26, Issue 7, Pages 17-31 doi: 10.1016/j.eng.2023.03.013

Abstract: In Section 1, we provide a brief overview of the N-glycan's structural organization, andNext, in Section 3, we summarize, systemize, and generalize the results from current N-glycosylationUntil now, such studies have been limited to an analysis of the human blood plasma N-glycomeand the N-glycosylation of immunoglobulin G and transferrin.mechanisms of action and biological targets of genetic variation that have been implicated in human protein N-glycosylation

Keywords： Glycome Glycans N-glycosylation Genomics Genetics GWAS

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Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution system

RAMESH, N. CHAKRABORTY, S. P. CHOWDHURY

Frontiers in Energy 2012, Volume 6, Issue 1, Pages 47-56 doi: 10.1007/s11708-011-0159-5

Abstract: The advancement in power distribution system poses a great challenge to power engineering researchers on how to best monitor and estimate the state of the distribution network. This paper is executed in two stage processes. The first stage is to identify the optimal location for installation of monitoring instrument with minimal investment cost. The second stage is to estimate the bus voltage magnitude, where real time measurement is conducted and measured through identified meter location which is more essential for decision making in distribution supervisory control and data acquisition system (DSCADA). The hybrid intelligent technique is applied to execute the above two algorithms. The algorithms are tested with institute of electrical and electronics engineers (IEEE) and Tamil Nadu electricity board (TNEB) benchmark systems. The simulated results proves that the swarm tuned artificial neural network (ANN) estimator is best suited for accurate estimation of voltage with different noise levels.

Keywords： artificial intelligence power distribution control state estimation

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Experiment study on fatigue property of concrete filled steel pipe K-joints

Zhong Xingu,Yang Sheng,Shi Weihua

Strategic Study of CAE 2011, Volume 13, Issue 9, Pages 97-100

Abstract: Moreover, the S—N curve of concrete filled steel pipe K-joints proposed by this paper would be

Keywords： concrete filled steel pipe K-joints fatigue property S—N curve

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Mechanical properties of steel, glass, and hybrid fiber reinforced reactive powder concrete

Neaz SHEIKH, Muhammad N.S. HADI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4, Pages 998-1006 doi: 10.1007/s11709-019-0533-7

Abstract: This study examines the properties of fiber-reinforced reactive powder concrete (FR-RPC). Steel fibers, glass fibers, and steel-glass hybrid fibers were used to prepare the FR-RPC. The non-fibrous reactive powder concrete (NF-RPC) was prepared as a reference mix. The proportion of fibers by volume for all FR-RPC mixes was 1.5%. Steel fibers of 13 mm length and 0.2 mm diameter were used to prepare the steel fiber-reinforced RPC (SFR-RPC). Glass fibers of 13 mm length and 1.3 mm diameter were used to prepare the glass fiber-reinforced RPC (GFR-RPC). The hybrid fiber-reinforced RPC (HFR-RPC) was prepared by mixing 0.9% steel fibers and 0.6% glass fibers. Compressive strength, axial load-axial deformation behavior, modulus of elasticity, indirect tensile strength, and shear strength of the RPC mixes were investigated. The results showed that SFR-RPC achieved higher compressive strength, indirect tensile strength and shear strength than NF-RPC, GFR-RPC, and HFR-RPC. Although the compressive strengths of GFR-RPC and HFR-RPC were slightly lower than the compressive strength of NF-RPC, the shear strengths of GFR-RPC and HFR-RPC were higher than that of NF-RPC.

Keywords： reactive powder concrete steel fiber glass fiber hybrid fiber