中国科学院机构知识库网格系统: 检索

An overview of experimental simulations of microbial activity in early Earth 期刊论文 OAI收割
FRONTIERS IN MICROBIOLOGY, 2023, 卷号: 13, 页码: 13
作者: Zhao, Mingyu; Zhao, Yao; Lin, Wei; Xiao, Ke-Qing

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收藏 | 浏览/下载：21/0 | 提交时间：2023/03/30

early Earth microbes biogeochemical cycles experimental simulations interactions

Characteristics, Mechanism and Criterion of Channel Segregation in NbTi Alloy via Numerical Simulations and Experimental Characterizations 期刊论文 OAI收割
MATERIALS, 2021, 卷号: 14, 期号: 4, 页码: 17
作者: Zhu, Baohui; Chen, Zhenzhen; Cao, Yanfei; Liu, Yanchang; Kang, Xiuhong

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收藏 | 浏览/下载：36/0 | 提交时间：2021/10/15

NbTi alloy channel segregation simulations experimental characterizations criterion

Computational prediction of cellulose solubilities in ionic liquids based on COSMO-RS 期刊论文 OAI收割
FLUID PHASE EQUILIBRIA, 2018, 卷号: 475, 页码: 25
作者: Chu, YH; Zhang, XP; Hillestad, M; He, XZ; Chu, Yunhan

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收藏 | 浏览/下载：145/0 | 提交时间：2018/12/29

Ionic Liquids Experimental-verification Cellulose Solubility Activity-coefficients Cosmo-rs Molecular-dynamics Activity Coefficient Screening Model Excess Enthalpy Force-field Dissolution Solvation Chloride Chemistry Simulations

Development of a moving model testing system 会议论文 OAI收割
Cagliari, Sardinia, Italy , 5-8 April 2016
作者: Yang QS(杨乾锁); Song JH(宋军浩); Guo DL(郭迪龙); Yang GW(杨国伟)

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收藏 | 浏览/下载：36/0 | 提交时间：2018/11/08

Brakes Compressed air Kinetic energy Kinetics Magnets Pressure vessels Railroad cars Railroad transportation Railroads Acceleration and deceleration Aerodynamic optimization Experimental simulations High speed train (HST) Initial pressure Moving model rig Pressure waves Relative motion

Improved method of target detection on optoelectronic hybrid joint transform correlator in cluttered scences (EI CONFERENCE) 会议论文 OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
作者: Yang L.; Yang L.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

A classical joint transform correlator (JTC) usually yields large correlation sidelobes as well as a large correlation peak width strong zero-order peak and low diffraction efficiency which make the detection ability of JTC lower. To overcome these difficulties firstly a joint power spectrum (JPS) subtraction technique in Fourier plane was proposed where reference image power spectrum and object image power spectrum are subtracted from the JPS before inverse Fourier-transform operation it is obvious that the modified JPS removes the zero-order term. Secondly a fringe-adjusted filter (FAF) was presented to suppress sidelobes and noises. The modified JPS is multiplied by a FAF before the inverse Fourier-transform operation to obtain the cross-correlation peak. Computer simulations demonstrated the improved method can obviously remove zero-order diffraction and effectively suppress the sidelobes and noises compared with classic JTC and then improve the detection ability for JTC. Experimental results presented the sharp correlation peak and also confirmed the method effectiveness. (2012) Trans Tech Publications Switzerland.

Application of trend extrapolation method to spectrum analysis of microtremor signal (EI CONFERENCE) 会议论文 OAI收割
2nd World Congress on Computer Science and Information Engineering, CSIE 2011, June 17, 2011 - June 19, 2011, Changchun, China
Zhou X.; Guo T.; Jiao J.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The trend extrapolation method is applied to spectrum analysis of microtremor signal in order to increase the spectral estimation accuracy. First establish an appropriate extrapolation model based on the existing data series and then fit correlation functions other than existing data by derivative least squares method finally perform spectrum analysis using extrapolated correlation functions. Numerical simulations and the experimental results show that good results are achieved no matter correlation functions change slow or rapid and the extrapolation error is not more than 2.3%. 2012 Springer-Verlag Berlin Heidelberg.

The effect of laser spot strengthened surface in elasto-hydrodynamic lubrication 会议论文 OAI收割
9th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2012, Chengdu, China, August 27, 2012 - August 30, 2012
作者: Xing XH(邢旭辉); Yang Z; Zhan LJ; Yang MJ(杨明江); Lin HQ

收藏 | 浏览/下载：15/0 | 提交时间：2017/06/20

Experimental simulations High contact pressures Laser spots Rail/wheel Rough surfaces Test machine Test specimens Tribology performance

A micromechanical model for deformation behavior of nanocrystalline copper 会议论文 OAI收割
2010 International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2010, Shenzhen, China, NOV 06-08, 2010
作者: Lan JX(兰姣霞); Wu YZ(吴永中); Hong YS(洪友士); Lan JX

收藏 | 浏览/下载：24/0 | 提交时间：2013/02/26

Algorithms Copper Deformation Grain boundaries Grain size and shape Materials Micromechanics Molecular dynamics Strain energy Deformation behavior Deformation mechanism Developed model Experimental values Grain shapes Grain size Internal variable theory Iteration algorithms Micromechanical model Molecular dynamics simulations Nanocrystalline copper Nanocrystallines Pure copper Statistical distribution Stress strain relation Uniaxial tensions

Phase error estimation with broadband white light by Phase Diversity (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Wang Z.; Wang B.; Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

The technique of Phase Diversity (PD) is widely adopted to measure the wavefront error caused by atmosphere turbulence and system error. PD solves the Zernike coefficients of the wavefront by utilizing two images obtained with different defocus value. In this paper we propose a method to restore the image and estimate the wavefront error of an imaging system. And we use present white noises to verify the robustness of the algorithm. We design an experiment system and implement it in our laboratory. The proposed algorithm is validated by computer simulations and experimental results. To use a broadband white object in experimental system a reasonable simplification for the system model is done. Our results show that the robustness against Gaussian white noises of the method is better then the case when the variance value is 0.03. The proposed method can be used as a wavefront sensor and restore the degradative images by photoelectric image system. 2010 SPIE.

Simulations and experimental studies of diffuser/nozzle pumps (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Precision Mechanical Measurements, August 25, 2008 - August 29, 2009, Hefei/Jiuhua Mountain, Anhui, China
作者: Li W.; Li W.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

An investigation of diffuser/nozzle micropumps is presented. Numerical simulations are done using CFD program ANSYS/Flotran. The simulations show when the opening angel is small the flow in the diffuser/nozzle is steady the mass flow is increasing with the adding opening angle. But when the opening angel continues increasing the pressure grads will be bigger than zero. It means that the static pressure is gradually going up along the diverging direction. The fluid near the wall stops flowing because the velocity decreases rapidly and the dynamic pressure is not big enough to overcome the increasing of the static pressure. Finally the fluid flows reversely from the backward position of higher pressure area this makes the separation flow of fluid the diffuser is full of reverse fluid. And this results in the dropping of mass flow at last. The simulations also show that the performance of diffuser with a round inlet is better than that with a sharp inlet. The mass flow of micropumps with different opening angles different inlets are measured. The experimental results agree well with the simulations. 2008 SPIE.