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Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 114-120 doi: 10.1007/s11709-014-0267-5

Abstract: The accurate and efficient simulation of random heterogeneous media is important in the framework of modeling and design of complex materials across multiple length scales. It is usually assumed that the morphology of a random microstructure can be described as a non-Gaussian random field that is completely defined by its multivariate distribution. A particular kind of non-Gaussian random fields with great practical importance is that of translation fields resulting from a simple memory-less transformation of an underlying Gaussian field with known second-order statistics. This paper provides a critical examination of existing random field models of heterogeneous two-phase media with emphasis on level-cut random fields which are a special case of translation fields. The case of random level sets, often used to represent the geometry of physical systems, is also examined. Two numerical examples are provided to illustrate the basic features of the different approaches.

Keywords： microstructure     random fields     level sets     shape recovery     two-phase media    

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An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memoryeffect in shape memory alloys

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 466-477 doi: 10.1007/s11709-015-0300-3

Abstract: Thermo-mechanical coupling in shape memory alloys is a very complicated phenomenon.lead to temperature-dependent variation of its mechanical behavior in the forms of superelasticity and shapealgorithm is proposed based on the original model of Lagoudas to efficiently model both superelasticity and shape

Keywords： shape memory alloy     thermo-mechanical coupling     superplasticity     shape memory effect    

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A novel shape memory alloy actuated soft gripper imitated hand behavior

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0700-8

Abstract: The limited length shrinkage of shape memory alloy (SMA) wire seriously limits the motion range of SMA-basedwithout silicone gel was designed based on pre bent SMA wire, and the finger was back to its original shape

Keywords： shape memory alloy (SMA)     pre bent     wire     gripper     grasping mode     lightweight    

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Size and shape effects of MnFeO nanoparticles as catalysts for reductive degradation of dye pollutants

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5,   Pages 108-171 doi: 10.1007/s11783-021-1396-4

Abstract: It was found that the catalytic activities were dependent on the size and shape of the MnFe2shape effects of MnFe2O4 nanoparticles demonstrated in this work not

Keywords： Dye degradation     MnFe2O4 nanoparticles     Size and shape-control    

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Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 348-357 doi: 10.1007/s11709-012-0176-4

Abstract: present study is to analytically investigate temperature effects of an axial-type seismic damper made of shape

Keywords： damage control design     shape memory alloy     temperature effect    

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Improved resilience measure for component recovery priority in power grids

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 545-556 doi: 10.1007/s42524-021-0161-5

Abstract: Consequently, the quick recovery of power grids after disasters has become a new research direction.The recovery priority of failed components after a disaster is determined according to the influenceResult shows that the recovery priorities of components with different importance measures vary.

Keywords： resilience measure     power grid     importance measure     component recovery    

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A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 504-515 doi: 10.1007/s11708-022-0855-3

Abstract: As a solid-solid phase change material, shape-memory alloys (SMAs) have the inherent advantages of leakageConsidering these characteristics, the design of the shape-memory alloy based the cold thermal energystorage system for precooling car seat application is introduced in this paper based on the proposed shape-memoryThe influence of initial temperature, elastocaloric materials, and the shape-memory alloy geometry schemeenergy storage materials, hopefully the proposed concept can promote the development of more promising shape-memory

Keywords： shape-memory alloy (SMA)     elastocaloric effect (eCE)     cooled seat     cold thermal energy storage    

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Definition and Verification of Shape Meter Method

Zhang Jinzhi,Duan Chunhua,Zhu Jianqin

Strategic Study of CAE 2001, Volume 3, Issue 12,   Pages 47-51

Abstract:

Shape survey and control mathematics model,analytical theory for shape stiffness and the shape andgauge coordination control law are called shape meter methcd.paper, two experimental methods had been adopted to verify the correctness and practicality of the shapemeter method ： one is to roll aluminum plate and calculate the shape stiffness of mill and rolled piece, then survey aluminum plate crown to verify shape stiffness e-quation;the other is to calculate survey

Keywords： shape meter methcxl     shape stiffness equation     survey and control mathematics model     follow-up calculation    

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Technologies for pollutant removal and resource recovery from blackwater: a review

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1683-3

Abstract:

● Blackwater is the main source of organics and nutrients in domestic wastewater.

Keywords： Blackwater     Water-flushing toilet     Sanitation     Nutrient recovery     Water reuse     Sustainable development    

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Calculation method on shape finding of self-anchored suspension bridge with spatial cables

Yan HAN, Zhengqing CHEN, Shidong LUO, Shankui YANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 165-172 doi: 10.1007/s11709-009-0021-6

Abstract: Based on the spatial model, a reliable and accurate calculation method on the shape finding of self-anchoredOn the principle that the shape of the main cables between hangers is catenary, the iteration methodThe reasonable position of the saddle was determined according to the shape and the theoretical jointThe results show that the shape-finding calculation method is effective and reliable.

Keywords： bridge engineering     self-anchored suspension bridges     special cables     shape-finding     calculation method    

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Dissolved methane in anaerobic effluent: Emission or recovery?

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-022-1537-4

Abstract: Although several dissolved methane recovery methods have been developed, their engineering feasibilityperspective, we thus intend to offer additional insights into the cost-benefit of dissolved methane recovery

Keywords： Anaerobic treatment     Municipal wastewater     Dissolved methane     Methane recovery     Carbon emission    

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China Launched the First Wastewater Resource Recovery Factory in Yixing

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 1, doi: 10.1007/s11783-021-1496-1

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Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 749-758 doi: 10.1007/s11705-022-2261-0

Abstract: contain high-value metals other than lithium, it is therefore necessary to strike a balance between recoveryHere, we describe a selective recovery process that can achieve economically efficient recovery and anAdjusting the acid concentration and amount of oxidant enables selective recovery of lithium ions.

Keywords： lithium iron phosphate powder     stoichiometric number     selective leaching     lithium recovery    

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Shape selective catalysis in methylation of toluene: Development, challenges and perspectives

Jian Zhou, Zhicheng Liu, Yangdong Wang, Dejin Kong, Zaiku Xie

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 103-112 doi: 10.1007/s11705-017-1671-x

Abstract: and afterwards covering external acid sites by surface modification to get short “micro-tunnels” with shape

Keywords： shape selective catalysis     methylation of toluene    

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Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 48-52 doi: 10.1007/s11465-018-0493-y

Abstract:

Three types of near-net shape casting aluminum parts were investigated by computed tomography to determine, and this absence of defects indicates that semi-solid casting could produce high-quality near-net shapedemonstrated that computed tomography is an efficient method to determine casting defects in near-net shape

Keywords： near-net shape casting     aluminum parts     casting defects     low pressure die casting     die casting     semi-solid    

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Title Author Date Type Operation

Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

Journal Article

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memoryeffect in shape memory alloys

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

Journal Article

A novel shape memory alloy actuated soft gripper imitated hand behavior

Journal Article

Size and shape effects of MnFeO nanoparticles as catalysts for reductive degradation of dye pollutants

Journal Article

Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI

Journal Article

Improved resilience measure for component recovery priority in power grids

Journal Article

A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

Journal Article

Definition and Verification of Shape Meter Method

Zhang Jinzhi,Duan Chunhua,Zhu Jianqin

Journal Article

Technologies for pollutant removal and resource recovery from blackwater: a review

Journal Article

Calculation method on shape finding of self-anchored suspension bridge with spatial cables

Yan HAN, Zhengqing CHEN, Shidong LUO, Shankui YANG

Journal Article

Dissolved methane in anaerobic effluent: Emission or recovery?

Journal Article

China Launched the First Wastewater Resource Recovery Factory in Yixing

Journal Article

Highly selective and green recovery of lithium ions from lithium iron phosphate powders with ozone

Journal Article

Shape selective catalysis in methylation of toluene: Development, challenges and perspectives

Jian Zhou, Zhicheng Liu, Yangdong Wang, Dejin Kong, Zaiku Xie

Journal Article

Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Journal Article