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Geometric optimization model for the solar cavity receiver with helical pipe at different solar radiation

Chongzhe ZOU, Huayi FENG, Yanping ZHANG, Quentin FALCOZ, Cheng ZHANG, Wei GAO

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 284-295 doi: 10.1007/s11708-019-0613-3

Abstract: In consideration of geometric parameters, several researches have already optimized the thermal efficiencyBesides, for a receiver in constant geometric parameters, the total heat losses increases dramaticallyIn summary, this paper proposed an optimization method in the form of a bunch of fitting curves which

Keywords： cylindrical cavity receiver     3-D numerical simulation     geometric optimization     direct normal irradiation    

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Mechanical and geometric advantages in compliant mechanism optimization

Michael Yu WANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 229-241 doi: 10.1007/s11465-009-0066-1

Abstract: This paper presents a focused examination of the mechanical and geometric advantages in compliant mechanismsand their ramifications in the design formulations of compliant mechanisms posed as a topology optimizationWith a linear elastic structural analysis, we quantify mechanical (and geometric) advantage in termsWe then analyze the common formulations of compliant mechanism optimization and the role of the externalAs a result, the topology optimization generates point flexures in the resulting optimal mechanisms.

Keywords： compliant mechanisms     topology optimization     mechanical advantage     pseudo rigid-body mechanisms    

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Optimal dome design considering member-related design constraints

Tugrul TALASLIOGLU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1150-1170 doi: 10.1007/s11709-019-0543-5

Abstract: A new Multi-objective Optimization Algorithm named Pareto Archived Genetic Algorithm (PAGA), which hasFurthermore, the computing efficiency of PAGA is evaluated considering six multi-objective optimizationConsequently, PAGA is recommended as an optimization tool for the design optimization of geometrically

Keywords： dome structure     geometric nonlinearity     multi-objective optimization     API RP2A-LRFD    

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Deformable image registration with geometric changes

Yu LIU,Bo ZHU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 829-837 doi: 10.1631/FITEE.1500045

Abstract: Geometric changes present a number of difficulties in deformable image registration.In this paper, we propose aglobal deformation framework to model geometric changes whilst promoting aachieve this, we have developed an innovative model which significantly reduces the side effects of geometricintroduction of a sparsity-inducing norm, which is typically L1 norm regularization targeting regions where geometric

Keywords： Geometric changes     Image registration     Sparsity     Traumatic brain injury (TBI)    

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Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed

Yingjun WANG,David J. BENSON

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 328-343 doi: 10.1007/s11465-016-0403-0

Abstract: the fast point-in-polygon (PIP) algorithm and trimmed elements is proposed for isogeometric topology optimization(TO) with arbitrary geometric constraints.completed by the efficient quadrature rule that can design the quadrature points and weights for arbitrary geometric

Keywords： isogeometric analysis     topology optimization     level set method     arbitrary geometric constraint     trimmed element    

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Probabilistic analysis of secant piles with random geometric imperfections

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 682-695 doi: 10.1007/s11709-021-0703-2

Abstract: safe and cost-effective secant-pile wall, a three-dimensional model of a secant pile, considering the geometricThe integrity of the secant-pile wall can be overestimated without considering the uncertainty of geometric

Keywords： secant piles     ultrasonic cross-hole testing     probabilistic analysis     reliability-based design     random imperfections    

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Zinc modification of Ni-Ti as efficient NiZnTi catalysts with both geometric and electronic improvements

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 4,   Pages 461-474 doi: 10.1007/s11705-021-2072-8

Abstract: The catalytic hydrogenation of nitroaromatics is an environmentally friendly technology for aniline production, and it is crucial to develop noble-metal-free catalysts that can achieve chemoselective hydrogenation of nitroaromatics under mild reaction conditions. In this work, zinc-modified Ni-Ti catalysts (NixZnyTi1) were fabricated and applied for the hydrogenation of nitroaromatics hydrogenation. It was found that the introduction of zinc effectively increases the surface Ni density, enhances the electronic effect, and improves the interaction between Ni and TiO2, resulting in smaller Ni particle size, more oxygen vacancies, higher dispersion and greater concentration of Ni on the catalyst surface. Furthermore, the electron-rich Niδ– obtained by electron transfer from Zn and Ti to Ni effectively adsorbs and dissociates hydrogen. The results reveal that NixZnyTi1 (Ni0.5Zn0.5Ti1) shows excellent catalytic performance under mild conditions (70 °C and 6 bar). These findings provide a rational strategy for the development of highly active non-noble-metal hydrogenation catalysts.

Keywords： bimetal strategy     oxygen vacancy     non-noble metal catalyst     hydrogenation     aromatic nitro compounds    

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Research on HJ-1A/B satellites data automatic geometric precision correction design

Xiong Wencheng,Shen Wenming,Wang Qiao,Shi Yuanli,Xiao Rulin and Fu Zhuo

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 37-42

Abstract: The realization of the observation data geometric precision correction is of great significance for macroThe paper analyzed the parameter characteristics of HJ-1satellite and geometric features of HJ-1satellitegeometric precision correction method were designed.Actual operating data showed that the method couldachieve good result for automatic geometric precision correction of HJ-1satellite data，automatic HJ-1CCD image geometric precision correction accuracy could be achieved within two pixels and automatic

Keywords： HJ-1satellite     automatic     geometric precision correction     CCD    

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Isogeometric analysis based on geometric reconstruction models

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 782-797 doi: 10.1007/s11465-021-0648-0

Abstract: In isogeometric analysis (IGA), the boundary representation of computer-aided design (CAD) and the tensor-product non-uniform rational B-spline structure make the analysis of three-dimensional (3D) problems with irregular geometries difficult. In this paper, an IGA method for complex models is presented by reconstructing analysis-suitable models. The CAD model is represented by boundary polygons or point cloud and is embedded into a regular background grid, and a model reconstruction method is proposed to obtain the level set function of the approximate model, which can be directly used in IGA. Three 3D examples are used to test the proposed method, and the results demonstrate that the proposed method can deal with complex engineering parts reconstructed by boundary polygons or point clouds.

Keywords： isogeometric analysis     reconstruction model     level set function     trimmed element     point cloud    

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Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 673-683 doi: 10.1007/s11708-019-0630-2

Abstract: Most of the literature focuses on the optical performance of receivers with different geometric shapes, but less research is conducted on the effects of critical geometric parameters.

Keywords： parabolic collector     conical cavity receiver     critical geometric parameters     optical performance    

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Model of Fuzzy Geometric Programming in Economical Power Supply Radius and Optimum Seeking Method

Cao Bingyuan

Strategic Study of CAE 2001, Volume 3, Issue 3,   Pages 52-55

Abstract: A fuzzy geometric programming model of power supply radius under the fuzzy environment, including problemswith other static and dynamic optimum mathematical models such as controlling models and classical geometric

Keywords： fuzzy geometric programming     economic power supply radius     optimum seeking     transformer substations capacity    

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Application of consistent geometric decomposition theorem to dynamic finite element of 3D composite beam

Iman FATTAHI, Hamid Reza MIRDAMADI, Hamid ABDOLLAHI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 675-689 doi: 10.1007/s11709-020-0625-4

Abstract: and strain fields are decomposed into cross-sectional and longitudinal components, called consistent geometricFurthermore, from the viewpoint of consistent geometric decomposition theorem, the transformation and

Keywords： composite beam     dynamic finite element     degrees of freedom coupling     experimental validation     numerical validation    

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Engineering the electronic and geometric structure of VO/BN@TiO heterostructure for efficient aerobic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 276-287 doi: 10.1007/s11705-022-2242-3

Abstract: Particle size governs the electronic and geometric structure of metal nanoparticles (NPs), shaping their

Keywords： oxidative desulfurization     boron nitride     vanadium     MXene     intercalation confinement    

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Spontaneous versus posed smile recognition via region-specific texture descriptor and geometric facial Article

Ping-ping WU, Hong LIU, Xue-wu ZHANG, Yuan GAO

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 7,   Pages 955-967 doi: 10.1631/FITEE.1600041

Abstract: Most previous related works about spontaneous versus posed smile recognition concentrate on extracting geometricdescriptor to represent local pattern changes of different facial regions and compensate for limitations of geometric

Keywords： Facial landmark localization     Geometric feature     Appearance feature     Smile recognition    

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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structural analysis. Adding the fictitious inertia and damping forces to the static equation, and turning it to the dynamic system, are the basis of this technique. Proper selection of the DRM artificial factors leads to the better convergence rate and efficient solutions. This study aims to increase the numerical stability, and to decrease the analysis time. To fulfil this objective, the reduction rate of analysis error for consecutive iterations is minimized. Based on this formulation, a new time step is found for the viscous dynamic relaxation. After combining this novel relationship with the other DRM factors, various geometrical nonlinear structures, such as, trusses, frames and shells are analyzed. The obtained results verify the efficiency of authors’ scheme.

Keywords： viscous dynamic relaxation     time step     displacement error     geometric nonlinear analysis    

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Title Author Date Type Operation

Geometric optimization model for the solar cavity receiver with helical pipe at different solar radiation

Chongzhe ZOU, Huayi FENG, Yanping ZHANG, Quentin FALCOZ, Cheng ZHANG, Wei GAO

Journal Article

Mechanical and geometric advantages in compliant mechanism optimization

Michael Yu WANG

Journal Article

Optimal dome design considering member-related design constraints

Tugrul TALASLIOGLU

Journal Article

Deformable image registration with geometric changes

Yu LIU,Bo ZHU

Journal Article

Geometrically constrained isogeometric parameterized level-set based topology optimization via trimmed

Yingjun WANG,David J. BENSON

Journal Article

Probabilistic analysis of secant piles with random geometric imperfections

Journal Article

Zinc modification of Ni-Ti as efficient NiZnTi catalysts with both geometric and electronic improvements

Journal Article

Research on HJ-1A/B satellites data automatic geometric precision correction design

Xiong Wencheng,Shen Wenming,Wang Qiao,Shi Yuanli,Xiao Rulin and Fu Zhuo

Journal Article

Isogeometric analysis based on geometric reconstruction models

Journal Article

Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Journal Article

Model of Fuzzy Geometric Programming in Economical Power Supply Radius and Optimum Seeking Method

Cao Bingyuan

Journal Article

Application of consistent geometric decomposition theorem to dynamic finite element of 3D composite beam

Iman FATTAHI, Hamid Reza MIRDAMADI, Hamid ABDOLLAHI

Journal Article

Engineering the electronic and geometric structure of VO/BN@TiO heterostructure for efficient aerobic

Journal Article

Spontaneous versus posed smile recognition via region-specific texture descriptor and geometric facial

Ping-ping WU, Hong LIU, Xue-wu ZHANG, Yuan GAO

Journal Article

A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article