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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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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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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: undertake two models to capture the nanostructure nonlocal size effects: the strain and the velocity gradientThe 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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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    

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Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete

Frontiers of Structural and Civil Engineering   Pages 1326-1340 doi: 10.1007/s11709-023-0014-x

Abstract: Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete

Keywords： strain relationship concrete    

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Preparation of hydrogels with uniform and gradient chemical structures using dialdehyde cellulose and

Peiwen Liu, Carsten Mai, Kai Zhang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 383-389 doi: 10.1007/s11705-018-1718-7

Abstract: In addition, a method for in situ preparation of gradient hydrogels is still lacking.Herein, we report the formation of hydrogels with either uniform or gradient internal structures viaAs-prepared hydrogels exhibited uniform microscopic and chemical structure or gradient distribution ofMoreover, this controllable process of aerating NH3 gas allows the in situ formation of gradienthydrogels; for instance, by using cyanamide as a reaction counterpart, gradient hydrogels with gradient

Keywords： hydrogel     uniform     gradient     dialdehyde cellulose     ammonia gas     diamine    

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A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations

Dongdong WANG, Jiarui WANG, Junchao WU, Junjun DENG, Ming SUN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 337-352 doi: 10.1007/s11709-018-0467-5

Abstract: A three-dimensional two-level gradient smoothing meshfree method is presented for rainfall induced landslideIt is shown that due to the successive gradient smoothing operation without the requirement of derivativecomputation in the present formulation, the two-level smoothed gradient of meshfree shape function iscapable of achieving a given influence domain more efficiently than the standard gradient of meshfreeSubsequently, the two-level smoothed gradient of meshfree shape function is employed to discretize the

Keywords： meshfree method     landslide     rainfall     three-dimensional two-level gradient smoothing     nodal integration    

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Effects of gradient concentration on the microstructure and electrochemical performance of LiNi

Wenming Li, Weijian Tang, Maoqin Qiu, Qiuge Zhang, Muhammad Irfan, Zeheng Yang, Weixin Zhang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 6,   Pages 988-996 doi: 10.1007/s11705-020-1918-9

Abstract: The design of gradient concentration (GC) particles with Ni-rich inside and Mn-rich outside is provedrationally-designed co-precipitation process for fabricating the Ni-rich layered cathode materials with gradient

Keywords： gradient concentration     Ni-rich     LiNi0.6Co0.2-Mn0.2O2     electrochemical    

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Experimental investigation on possibility of oxygen enrichment by using gradient magnetic fields

CAI Jun, WANG Li, TONG Lige, SUN Shufeng, WU Ping

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 271-276 doi: 10.1007/s11705-007-0049-x

Abstract: This paper presents a novel method that uses the interception effect of gradient magnetic field on oxygenmagnetic poles of two magnets at a certain distance forms a magnetic space having a field intensity gradientmagnetic space via its borders, oxygen molecules in the air will experience the interception effect of the gradientrespectively, and the gas temperature is 298 K and the maximal product of magnetic flux density and its gradientenrichment degree drops to 0.32%; and when the maximal product of magnetic flux density and field intensity gradient
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Survey on Extraction Methods of Transition Region

Liu Suolan,Yang Jingyu

Strategic Study of CAE 2007, Volume 9, Issue 9,   Pages 89-96

Abstract:  Two kinds of methods have been introduced: methods based on gradient and methods based on non-gradient

Keywords： transition region     extraction     image segmentation     gradient method     non-gradient method    

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Salinity Gradient Energy: Current State and New Trends

Olivier Schaetzle, Cees J. N. Buisman

Engineering 2015, Volume 1, Issue 2,   Pages 164-166 doi: 10.15302/J-ENG-2015046

Abstract:

In this article we give an overview of the state of the art of salinity gradient technologies.We first introduce the concept of salinity gradient energy, before describing the current state of developmentWe conclude with the new trends in the young field of salinity gradient technologies.

Keywords： salinity gradient energy     pressure-retarded osmosis     reverses electrodialysis    

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The Nanoscale Density Gradient as a Structural Stabilizer for Glass Formation Article

Shaoxiong Zhou, Bangshao Dong, Yanguo Wang, Jingyu Qin, Weihua Wang

Engineering 2023, Volume 29, Issue 10,   Pages 120-129 doi: 10.1016/j.eng.2023.01.010

Abstract: In this study, the nanoscale density gradient (NDG) originating from a sequential arrangement of clusters

Keywords： Rapid cooling     Amorphous solid     Density gradient     Electron tomography     Atomic clusters    

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Viability of Harvesting Salinity Gradient (Blue) Energy by Nanopore-Based Osmotic Power Generation Article

Zhangxin Wang, Li Wang, Menachem Elimelech

Engineering 2022, Volume 9, Issue 2,   Pages 51-60 doi: 10.1016/j.eng.2021.02.016

Abstract: novel materials with ion-selective nanochannels has introduced a new technology for harvesting salinity gradient

Keywords： Nanopore power generator     Salinity gradient (blue) energy     Power density     Specific extractable energy    

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Development of machine learning multi-city model for municipal solid waste generation prediction

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1551-6

Abstract:

● A database of municipal solid waste (MSW) generation in China was established.

Keywords： Municipal solid waste     Machine learning     Multi-cities     Gradient boost regression tree    

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Title Author Date Type Operation

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

Journal Article

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

Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI

Journal Article

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Journal Article

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

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

Journal Article

Gradient-based compressive image fusion

Yang CHEN,Zheng QIN

Journal Article

Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete

Journal Article

Preparation of hydrogels with uniform and gradient chemical structures using dialdehyde cellulose and

Peiwen Liu, Carsten Mai, Kai Zhang

Journal Article

A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations

Dongdong WANG, Jiarui WANG, Junchao WU, Junjun DENG, Ming SUN

Journal Article

Effects of gradient concentration on the microstructure and electrochemical performance of LiNi

Wenming Li, Weijian Tang, Maoqin Qiu, Qiuge Zhang, Muhammad Irfan, Zeheng Yang, Weixin Zhang

Journal Article

Experimental investigation on possibility of oxygen enrichment by using gradient magnetic fields

CAI Jun, WANG Li, TONG Lige, SUN Shufeng, WU Ping

Journal Article

Survey on Extraction Methods of Transition Region

Liu Suolan,Yang Jingyu

Journal Article

Salinity Gradient Energy: Current State and New Trends

Olivier Schaetzle, Cees J. N. Buisman

Journal Article

The Nanoscale Density Gradient as a Structural Stabilizer for Glass Formation

Shaoxiong Zhou, Bangshao Dong, Yanguo Wang, Jingyu Qin, Weihua Wang

Journal Article

Viability of Harvesting Salinity Gradient (Blue) Energy by Nanopore-Based Osmotic Power Generation

Zhangxin Wang, Li Wang, Menachem Elimelech

Journal Article

Development of machine learning multi-city model for municipal solid waste generation prediction

Journal Article