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Assembly variation analysis of flexible curved surfaces based on Bézier curves None

Zhen-yu LIU, Shi-en ZHOU, Jin CHENG, Chan QIU, Jian-rong TAN

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 6,   Pages 796-808 doi: 10.1631/FITEE.1601619

Abstract: A methodology based on Bézier curves is proposed to represent the side lines of surfaces.

Keywords： Assembly variation analysis     Feature points     Side lines     Flexible curved surfaces     Bézier curves    

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Optimal multi-degree reduction of C-Bézier surfaces with constraints Article

Lian ZHOU, Xin-hui LIN, Hong-yan ZHAO, Jun CHEN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2009-2016 doi: 10.1631/FITEE.1700458

Abstract: We propose an optimal approach to solve the problem of multi-degree reduction of C-Bézier surfaces inThe control points of the degree-reduced C-Bézier surfaces can be explicitly obtained by using a matrixoperation that is based on the transfer matrix of the C-Bézier basis.

Keywords： C-Bé     zier surfaces     Degree reduction     Boundary constraints    

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Ray-triangular Bézier patch intersection using hybrid clipping algorithm Article

Yan-hong LIU,Juan CAO,Zhong-gui CHEN,Xiao-ming ZENG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 10,   Pages 1018-1030 doi: 10.1631/FITEE.1500390

Abstract: geometric method for efficiently and robustly computing intersections between a ray and a triangular Bézierthe intersection to a smaller triangular domain, which is determined by pairs of lines and quadratic curvesExperiments have been conducted to illustrate the efficacy of our method in solving ray-triangular Bézier

Keywords： Ray tracing     Triangular Bé     zier surface     Ray-patch intersection     Root-finding     Hybrid clipping    

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Development of realistic design fire time-temperature curves for the testing of cold-formed steel wall

Anthony Deloge ARIYANAYAGAM,Mahen MAHENDRAN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 427-447 doi: 10.1007/s11709-014-0279-1

Abstract: This paper presents the details of a research study aimed at developing realistic design fire curvesincludes a review of the characteristics of building fires, previously developed fire time-temperature curvesThe paper highlights that real building fire time-temperature curves depend on the fuel load representingFinally, realistic design fire time-temperature curves simulating the fire conditions in modern residential

Keywords： fire safety     standard fire curve     realistic design fire time-temperature curves     light gauge steel frame    

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Erratum to: Meter-scale variation within a single transect demands attention to taxon accumulation curves

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-022-1560-5

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Meter-scale variation within a single transect demands attention to taxon accumulation curves in riverine

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-022-1543-6

Abstract:

● Riverine microbiomes exhibited hyperlocal variation within a single transect.

Keywords： Microbiome     Freshwater     Taxon accumulation curve     Community assembly    

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Damage-constitutive model for seawater coral concrete using different stirrup confinements subjected to axial loading

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 429-447 doi: 10.1007/s11709-022-0913-2

Abstract: Subsequently, the stress−strain curves of specimens subjected to axial loading were measured., and the proposed damage-constitutive model had a good correlation with the measured stress−strain curves

Keywords： coral aggregate concrete     stress−strain curves     lateral effective stress     peak stress     axial−lateralcurves     damage-constitutive model.    

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Seismic fragility curves for structures using non-parametric representations

Chu MAI, Katerina KONAKLI, Bruno SUDRET

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 169-186 doi: 10.1007/s11709-017-0385-y

Abstract: Fragility curves are commonly used in civil engineering to assess the vulnerability of structures toThe classical approach relies on assuming a lognormal shape of the fragility curves; it is thus parametricAs an illustration, we compute the fragility curves for a three-storey steel frame using a large numberThe curves obtained with the non-parametric approaches are compared with respective curves based on theIt is found that the accuracy of the lognormal curves depends on the ground motion intensity measure,

Keywords： earthquake engineering     fragility curves     lognormal assumption     non-parametric approach     kernel density estimation    

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Scaled boundary finite element method with exact defining curves for two-dimensional linear multi-field

Jaroon RUNGAMORNRAT, Chung Nguyen VAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 201-214 doi: 10.1007/s11709-018-0488-0

Abstract: This paper presents an efficient and accurate numerical technique based upon the scaled boundary finite element method for the analysis of two-dimensional, linear, second-order, boundary value problems with a domain completely described by a circular defining curve. The scaled boundary finite element formulation is established in a general framework allowing single-field and multi-field problems, bounded and unbounded bodies, distributed body source, and general boundary conditions to be treated in a unified fashion. The conventional polar coordinates together with a properly selected scaling center are utilized to achieve the exact description of the circular defining curve, exact geometry of the domain, and exact spatial differential operators. Standard finite element shape functions are employed in the discretization of both trial and test functions in the circumferential direction and the resulting eigenproblem is solved by a selected efficient algorithm. The computational performance of the implemented procedure is then fully investigated for various scenarios to demonstrate the accuracy in comparison with standard linear elements.

Keywords： multi-field problems     defining curve     exact geometry     general boundary conditions     SBFEM    

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Numerical investigation of the ultimate lateral resistance of piles in soft clay

Konstantinos P. TZIVAKOS,Michael J. KAVVADAS

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 194-200 doi: 10.1007/s11709-014-0251-0

Abstract: curves proposed in literature for soft clays are imported into a beam-on-nonlinear-Winkler-foundation

Keywords： y curves     finite element method (FEM)    

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Current hepatitis B treatment guidelines and future research directions

Jonathan Skupsky,Ke-Qin Hu

Frontiers of Medicine 2014, Volume 8, Issue 2,   Pages 145-157 doi: 10.1007/s11684-014-0335-1

Abstract:

Hepatitis B virus (HBV) infection causes a tremendous clinical burden across the world with more than

Keywords： chronic hepatitis B     HBV treatment guidelines     APASL guidelines     EASL guidelines     AASLD guidelines    

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Clinical characteristics and risk factors of COVID-19 patients with chronic hepatitis B: a multi-center

Frontiers of Medicine 2022, Volume 16, Issue 1,   Pages 111-125 doi: 10.1007/s11684-021-0854-5

Abstract: 19 patients, the association of liver injury caused by specific subtype especially chronic hepatitis B

Keywords： COVID-19     chronic hepatitis B     liver injury     coagulation dysfunction    

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Vaccine therapies for chronic hepatitis B: can we go further?

Yumei Wen, Xuanyi Wang, Bin Wang, Zhenhong Yuan

Frontiers of Medicine 2014, Volume 8, Issue 1,   Pages 17-23 doi: 10.1007/s11684-014-0313-7

Abstract:

Chronic hepatitis B is a major health burden worldwide.treatment, therapeutic vaccination is a promising new strategy for the control of chronic hepatitis B.basis of the major specific and non-specific immune dysregulations and defects in chronic hepatitis B

Keywords： chronic hepatitis B     therapeutic     antigen-antibody complexes     DNA     vaccine    

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Chronic hepatitis B virus infection: epidemiology, prevention, and treatment in China

Rui Yu,Rong Fan,Jinlin Hou

Frontiers of Medicine 2014, Volume 8, Issue 2,   Pages 135-144 doi: 10.1007/s11684-014-0331-5

Abstract:

Chronic hepatitis B is a major health problem in China.The universal vaccination program since 1992 has changed the epidemiology of hepatitis B virus infectionThe most prevalent hepatitis B virus strains in China are genotypes B and C, whereas those in westernChronic hepatitis B poses a heavy burden to the society in China.

Keywords： chronic hepatitis B     epidemiology     prevention     treatment    

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Durability analysis of B grade steel side-frame based on the PFM method

Li Wei and Wang Ping

Strategic Study of CAE 2011, Volume 13, Issue 1,   Pages 56-61

Abstract: simulated durability test is performed to study the details with angle of side-frame of wagon bogie made of B

Keywords： durability     fatigue     B grade steel     crack    

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Title Author Date Type Operation

Assembly variation analysis of flexible curved surfaces based on Bézier curves

Zhen-yu LIU, Shi-en ZHOU, Jin CHENG, Chan QIU, Jian-rong TAN

Journal Article

Optimal multi-degree reduction of C-Bézier surfaces with constraints

Lian ZHOU, Xin-hui LIN, Hong-yan ZHAO, Jun CHEN

Journal Article

Ray-triangular Bézier patch intersection using hybrid clipping algorithm

Yan-hong LIU,Juan CAO,Zhong-gui CHEN,Xiao-ming ZENG

Journal Article

Development of realistic design fire time-temperature curves for the testing of cold-formed steel wall

Anthony Deloge ARIYANAYAGAM,Mahen MAHENDRAN

Journal Article

Erratum to: Meter-scale variation within a single transect demands attention to taxon accumulation curves

Journal Article

Meter-scale variation within a single transect demands attention to taxon accumulation curves in riverine

Journal Article

Damage-constitutive model for seawater coral concrete using different stirrup confinements subjected to axial loading

Journal Article

Seismic fragility curves for structures using non-parametric representations

Chu MAI, Katerina KONAKLI, Bruno SUDRET

Journal Article

Scaled boundary finite element method with exact defining curves for two-dimensional linear multi-field

Jaroon RUNGAMORNRAT, Chung Nguyen VAN

Journal Article

Numerical investigation of the ultimate lateral resistance of piles in soft clay

Konstantinos P. TZIVAKOS,Michael J. KAVVADAS

Journal Article

Current hepatitis B treatment guidelines and future research directions

Jonathan Skupsky,Ke-Qin Hu

Journal Article

Clinical characteristics and risk factors of COVID-19 patients with chronic hepatitis B: a multi-center

Journal Article

Vaccine therapies for chronic hepatitis B: can we go further?

Yumei Wen, Xuanyi Wang, Bin Wang, Zhenhong Yuan

Journal Article

Chronic hepatitis B virus infection: epidemiology, prevention, and treatment in China

Rui Yu,Rong Fan,Jinlin Hou

Journal Article

Durability analysis of B grade steel side-frame based on the PFM method

Li Wei and Wang Ping

Journal Article