检索范围:
排序: 展示方式:
Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators
Hamid M. SEDIGHI, Hassen M. OUAKAD
《结构与土木工程前沿(英文)》 2020年 第14卷 第6期 页码 1520-1530 doi: 10.1007/s11709-020-0672-x
关键词: velocity gradient elasticity theory nanotube resonators differential-quadrature method nonlinear vibration
Suspended solid abatement in a conical fluidized bed flocculator
Dandan ZHOU, Shuangshi DONG, Keyu LI, Huizhong JIANG, Dandan SHANG
《环境科学与工程前沿(英文)》 2013年 第7卷 第1期 页码 127-134 doi: 10.1007/s11783-012-0415-x
《结构与土木工程前沿(英文)》 页码 1310-1325 doi: 10.1007/s11709-023-0997-3
关键词: sustainable concrete fly ash slay extreme gradient boosting technique squirrel search algorithm parametric analysis
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
《机械工程前沿(英文)》 2015年 第10卷 第2期 页码 187-197 doi: 10.1007/s11465-015-0339-9
In this paper, for the first time, the modified strain gradient theory is used as a new size-dependent Kirchhoff micro-plate model to study the effect of interlayer van der Waals (vdW) force for the vibration analysis of multilayered graphene sheets (MLGSs). The model contains three material length scale parameters, which may effectively capture the size effect. The model can also degenerate into the modified couple stress plate model or the classical plate model, if two or all of the material length scale parameters are taken to be zero. After obtaining the governing equations based on modified strain gradient theory via principle of minimum potential energy, as only infinitesimal vibration is considered, the net pressure due to the vdW interaction is assumed to be linearly proportional to the deflection between two layers. To solve the governing equation subjected to the boundary conditions, the Fourier series is assumed for w=w(x, y). To show the accuracy of the formulations, present results in specific cases are compared with available results in literature and a good agreement can be seen. The results indicate that the present model can predict prominent natural frequency with the reduction of structural size, especially when the plate thickness is on the same order of the material length scale parameter.
关键词: graphene van der Waals (vdW) force modi- fied strain gradient elasticity theory size effect parameter
Prediction of the shear wave velocity
Amoroso SARA
《结构与土木工程前沿(英文)》 2014年 第8卷 第1期 页码 83-92 doi: 10.1007/s11709-013-0234-6
关键词: horizontal stress index shear wave velocity flat dilatometer test cone penetration test
Thuy-Anh NGUYEN; Hai-Bang LY; Van Quan TRAN
《结构与土木工程前沿(英文)》 2022年 第16卷 第10期 页码 1267-1286 doi: 10.1007/s11709-022-0842-0
关键词: slender beam shear strength gradient boosting optimization algorithms
Gradient-based compressive image fusion
Yang CHEN,Zheng QIN
《信息与电子工程前沿(英文)》 2015年 第16卷 第3期 页码 227-237 doi: 10.1631/FITEE.1400217
关键词: Compressive sensing (CS) Image fusion Gradient-based image fusion CS-based image fusion
Influence of freeze–thaw damage gradient on stress–strain relationship of stressed concrete
《结构与土木工程前沿(英文)》 页码 1326-1340 doi: 10.1007/s11709-023-0014-x
Hossein ASADI KALAMEH, Arash KARAMALI, Cosmin ANITESCU, Timon RABCZUK
《结构与土木工程前沿(英文)》 2012年 第6卷 第2期 页码 101-110 doi: 10.1007/s11709-012-0160-z
关键词: smoothed particle hydrodynamics high velocity impact sensitivity analysis
Experimental study on velocity characteristics of recirculation zone in humid air non-premixed flame
GU Xin, ZANG Shusheng, GE Bing
《能源前沿(英文)》 2008年 第2卷 第2期 页码 140-144 doi: 10.1007/s11708-008-0037-y
关键词: distance bluff-body fuel-to-air velocity stagnation parameter
Peiwen Liu, Carsten Mai, Kai Zhang
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 383-389 doi: 10.1007/s11705-018-1718-7
Hydrogels with precisely designed structures represent promising materials with a broad application spectrum, such as for sensor, tissue engineering and biomimetic technology. However, with highly reactive compounds, the preparation of hydrogels still needs an efficient approach for desired distribution of each component within hydrogels. 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 via a novel, simple but very efficient method by aerating ammonia gas (NH3 gas) into the solution of dialdehyde cellulose (DAC) and a diamine. As-prepared hydrogels exhibited uniform microscopic and chemical structure or gradient distribution of functional groups. Due to lots of aldehyde groups on DAC chains, functional hydrogels can be prepared by using diverse diamines. For instance, hydrogels prepared by using 1,6-hexanediamine as a cross-linker were responsive to pH values. Moreover, this controllable process of aerating NH3 gas allows the in situ formation of gradient hydrogels; for instance, by using cyanamide as a reaction counterpart, gradient hydrogels with gradient distributions of cyanide groups were prepared.
关键词: hydrogel uniform gradient dialdehyde cellulose ammonia gas diamine
《医学前沿(英文)》 2022年 第16卷 第5期 页码 714-722 doi: 10.1007/s11684-021-0888-8
关键词: metabolic dysfunction-associated fatty liver disease non-alcoholic fatty liver disease fibrosis score brachial-ankle pulse wave velocity albuminuria
Dongdong WANG, Jiarui WANG, Junchao WU, Junjun DENG, Ming SUN
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 337-352 doi: 10.1007/s11709-018-0467-5
关键词: meshfree method landslide rainfall three-dimensional two-level gradient smoothing nodal integration
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
《化学科学与工程前沿(英文)》 2020年 第14卷 第6期 页码 988-996 doi: 10.1007/s11705-020-1918-9
关键词: gradient concentration Ni-rich LiNi0.6Co0.2-Mn0.2O2 electrochemical performance lithium-ion battery
标题 作者 时间 类型 操作
Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators
Hamid M. SEDIGHI, Hassen M. OUAKAD
期刊论文
Suspended solid abatement in a conical fluidized bed flocculator
Dandan ZHOU, Shuangshi DONG, Keyu LI, Huizhong JIANG, Dandan SHANG
期刊论文
prediction and optimization design of sustainable concrete based on squirrel search algorithm-extreme gradient
期刊论文
Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
期刊论文
Predicting shear strength of slender beams without reinforcement using hybrid gradient boosting trees
Thuy-Anh NGUYEN; Hai-Bang LY; Van Quan TRAN
期刊论文
High velocity impact of metal sphere on thin metallic plate using smooth particle hydrodynamics (SPH)
Hossein ASADI KALAMEH, Arash KARAMALI, Cosmin ANITESCU, Timon RABCZUK
期刊论文
Experimental study on velocity characteristics of recirculation zone in humid air non-premixed flame
GU Xin, ZANG Shusheng, GE Bing
期刊论文
Preparation of hydrogels with uniform and gradient chemical structures using dialdehyde cellulose and
Peiwen Liu, Carsten Mai, Kai Zhang
期刊论文
definition of metabolic dysfunction-associated fatty liver disease with elevated brachial-ankle pulse wave velocity
期刊论文
A three-dimensional two-level gradient smoothing meshfree method for rainfall induced landslide simulations
Dongdong WANG, Jiarui WANG, Junchao WU, Junjun DENG, Ming SUN
期刊论文