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Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6, Pages 1520-1530 doi: 10.1007/s11709-020-0672-x

Abstract: We undertake two models to capture the nanostructure nonlocal size effects: the strain and the velocitygradient theories.The structural nonlinear behavior of the system assuming both strain and velocity gradient theories is

Keywords： velocity gradient elasticity theory nanotube resonators differential-quadrature method nonlinear vibration

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Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory

Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2, Pages 187-197 doi: 10.1007/s11465-015-0339-9

Abstract:

In this paper, for the first time, the modified strain gradient theory is used as a new size-dependentAfter obtaining the governing equations based on modified strain gradient theory via principle of minimum

Keywords： graphene van der Waals (vdW) force modi- fied strain gradient elasticity theory size effect parameter

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Research on Water Velocity in Filling up Section of Horizontal Pipe

Wang Dongmei,Zhang Shilin

Strategic Study of CAE 2005, Volume 7, Issue 2, Pages 66-68

Abstract: Water velocity distribution in circular section of pipe has been studied for a long time, and advancedBased on fore theory and some tentatives, theory about distribution of water velocity in pipe of arcuateResearch of seepage section is based on seeping theory.Many experiments proved that the theory and program of this article are correct.

Keywords： arcuate section filling up bed water velocity zero shear point water-power gradient

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Suspended solid abatement in a conical fluidized bed flocculator

Dandan ZHOU, Shuangshi DONG, Keyu LI, Huizhong JIANG, Dandan SHANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1, Pages 127-134 doi: 10.1007/s11783-012-0415-x

Abstract: increase with increasing Camp Number and flocculation time ( ), but decreased with the increase of velocitygradient ( ) within the range studied in this research (165.1–189.6 s ).The results of the calculated fractal dimension and measured free sedimentation velocity of flocs obtained

Keywords： conical fluidized bed flocculation velocity gradient

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Empirical models and design codes in prediction of modulus of elasticity of concrete

Behnam VAKHSHOURI, Shami NEJADI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 38-48 doi: 10.1007/s11709-018-0479-1

Abstract: Modulus of Elasticity (MOE) is a key parameter in reinforced concrete design.

Keywords： modulus of elasticity normal strength normal weight concrete empirical models design codes compressive

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Yue’s solution of classical elasticity in

Zhong-qi Quentin YUE

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3, Pages 215-249 doi: 10.1007/s11709-015-0298-6

Abstract: The mathematical theory of linear elasticity is one of the most classical field theories in mechanicsFor more than 150 years from 1838 to present, one of the remaining key tasks in classical elasticityThe boundary-value problems of classical elasticity in -layered and graded solids are also one of theIn particular, he has derived the exact and complete fundamental singular solutions for elasticity ofverification of the solutions and further applications for exact and complete solutions of other problems in elasticity

Keywords： elasticity solution layered solid graded material

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Simulation of horizontal slug-flow pneumatic conveying with kinetic theory

GU Zhengmeng, GUO Liejin

Frontiers in Energy 2007, Volume 1, Issue 3, Pages 336-340 doi: 10.1007/s11708-007-0050-6

Abstract: Kinetic theory was introduced to establish a 3D kinetic numerical model for wavelike slug gas-solid flowThe characteristics of the flow, such as pressure drop, air velocity distribution, slug length and settledthickness, and the detailed changing characteristics of slug length and settled layer thickness with air velocityThe results indicate that kinetic theory can represent the physical characteristics of the non-suspension

Keywords： velocity distribution detailed slug-flow gas-solid theory

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prediction and optimization design of sustainable concrete based on squirrel search algorithm-extreme gradient

Frontiers of Structural and Civil Engineering Pages 1310-1325 doi: 10.1007/s11709-023-0997-3

Abstract: traditional compressive strength test, this study combines five novel metaheuristic algorithms with extreme gradientThe results indicated that the squirrel search algorithm-extreme gradient boosting (SSA-XGB) yielded

Keywords： sustainable concrete fly ash slay extreme gradient boosting technique squirrel search algorithm

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Prediction of the shear wave velocity

Amoroso SARA

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1, Pages 83-92 doi: 10.1007/s11709-013-0234-6

Abstract: The paper examines the correlations to obtain rough estimates of the shear wave velocity from non-seismic

Keywords： horizontal stress index shear wave velocity flat dilatometer test cone penetration test

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Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 188-205 doi: 10.1007/s11709-013-0199-5

Abstract: This important problem can be solved with the modern theory of complex systems.

Keywords： real time monitoring telemetry dam tilts diagnostic tools hysteresis nonlinear dynamics

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Axisymmetric loading on nanoscale multilayered media

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1, Pages 152-164 doi: 10.1007/s11709-022-0895-0

Abstract: Because the effect of surface energy becomes nontrivial at such a small scale, a modified continuum theoryA Gurtin–Murdoch continuum model of surface elasticity is implemented to establish a computational scheme

Keywords： functionally graded layer Gurtin–Murdoch surface elasticity multilayered medium size dependency stiffness

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Some Scientific Problems in Proca's Theory Study

Huang Zhixun

Strategic Study of CAE 2005, Volume 7, Issue 3, Pages 6-12

Abstract: The purpose of this paper is to study the EM-wave velocity in the Proca's theory frame.

Keywords： special relativity Maxwell equations Proca equations velocity of EM-waves rest mass of photon

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Predicting shear strength of slender beams without reinforcement using hybrid gradient boosting trees

Thuy-Anh NGUYEN; Hai-Bang LY; Van Quan TRAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10, Pages 1267-1286 doi: 10.1007/s11709-022-0842-0

Abstract: Gradient Boosting (GB) technique was developed and evaluated in combination with three different optimization

Keywords： slender beam shear strength gradient boosting optimization algorithms

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Gradient-based compressive image fusion

Yang CHEN,Zheng QIN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3, Pages 227-237 doi: 10.1631/FITEE.1400217

Abstract: We present a novel image fusion scheme based on gradient and scrambled block Hadamard ensemble (SBHE)In the fusion phase, the image gradient is calculated to reflect the abundance of its contour informationBy compositing the gradient of each image, gradient-based weights are obtained, with which compressiveSimulation results demonstrate that the gradient-based scheme has the best performance, in terms of bothFurthermore, the gradient-based fusion scheme proposed in this paper can be applied in different fusion

Keywords： Compressive sensing (CS) Image fusion Gradient-based image fusion CS-based image fusion