检索范围:
排序: 展示方式:
Quan Yuan, Hui Gong, Hao Xi, Kaijun Wang
《环境科学与工程前沿(英文)》 2020年 第14卷 第3期 doi: 10.1007/s11783-020-1226-0
关键词: Anaerobic plug-flow feeding mode Anaerobic mixed-flow mode Fermentation pretreatment Substrate gradient Penetration depth
Effect of streambed substrate on macroinvertebrate biodiversity
DUAN Xuehua, WANG Zhaoyin, TIAN Shimin
《环境科学与工程前沿(英文)》 2008年 第2卷 第1期 页码 122-128 doi: 10.1007/s11783-008-0023-y
关键词: Substrata physical environmental indicator ecology substrate
《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
V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics
《环境科学与工程前沿(英文)》 2022年 第16卷 第11期 doi: 10.1007/s11783-022-1578-8
● V-shaped substrate was obtained for SERS analysis of microplastics (diameter ≈ 1 μm).
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
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 294-300 doi: 10.1007/s11465-015-0351-0
The elastic modulus of a deposit (Ed) can be obtained by monitoring the temperature (?T) and curvature (?k) of a one-side coated long plate, namely, a one-dimensional (1D) deformation model. The aim of this research is to design an experimental setup that proves whether a 1D deformation model can be scaled for complex geometries. The setup includes a laser displacement sensor mounted on a robotic arm capable of scanning a specimen surface and measuring its deformation. The reproducibility of the results is verified by comparing the present results with Stony Brook University Laboratory’s results. The ?k-?T slope error is less than 8%, and the Ed estimation error is close to 2%. These values reveal the repeatability of the experiments. Several samples fabricated with aluminum as the substrate and 100MXC nanowire (Fe and Cr alloy) as the deposit are analyzed and compared with those in finite element (FE) simulations. The linear elastic behavior of 1D (flat long plate) and 2D (squared plate) specimens during heating/cooling cycles is demonstrated by the high linearity of all ?k-?T curves (over 97%). The Ed values are approximately equal for 1D and 2D analyses, with a median of 96 GPa and standard deviation of 2 GPa. The correspondence between the experimental and simulated results for the 1D and 2D specimens reveals that deformation and thermal stress in coated specimens can be predicted regardless of specimen geometry through FE modeling and by using the experimental value of Ed. An example of a turbine-blade-shaped substrate is presented to validate the approach.
关键词: in-plane Young’s modulus curvature temperature thermal stress coating
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
Crk-associated substrate, vascular smooth muscle and hypertension
TANG Dale
《医学前沿(英文)》 2008年 第2卷 第4期 页码 323-331 doi: 10.1007/s11684-008-0062-6
关键词: Contraction stimulation phosphatase-proline molecular structure discovered hypertension
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
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
Recent advances in SERS detection of perchlorate
Jumin Hao, Xiaoguang Meng
《化学科学与工程前沿(英文)》 2017年 第11卷 第3期 页码 448-464 doi: 10.1007/s11705-017-1611-9
关键词: perchlorate SERS detection substrate modification nanostructure
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
Aerobic granular sludge formation based on substrate availability: Effects of flow pattern and fermentation
Quan Yuan, Hui Gong, Hao Xi, Kaijun Wang
期刊论文
Effect of streambed substrate on macroinvertebrate biodiversity
DUAN Xuehua, WANG Zhaoyin, TIAN Shimin
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
V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics
期刊论文
Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators
Hamid M. SEDIGHI, Hassen M. OUAKAD
期刊论文
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
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
Preparation of hydrogels with uniform and gradient chemical structures using dialdehyde cellulose and
Peiwen Liu, Carsten Mai, Kai Zhang
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