Hubei Province Key Laboratory of Systems Science in Metallurgical Process

Wuhan, China

Hubei Province Key Laboratory of Systems Science in Metallurgical Process

Wuhan, China
SEARCH FILTERS
Time filter
Source Type

Zheng H.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Zheng H.,Wuhan University of Science and Technology | Zhu S.,Wuhan University of Technology | Li Z.,Wuhan University of Technology
Gongneng Cailiao/Journal of Functional Materials | Year: 2015

The piezoresistive responses of the composites fabricated by short-cut carbon fiber mat and epoxy resin were studied by uniaxial tension tests. Positive piezoresistive effect of this composite was found in the test. The gauge factor for single-lamina carbon fiber mat/epoxy resin composite is as high as 13.9, but the resistance for this composite is observed to be decreased gradually. More stable piezoresistivity was attained in laminated composite and the gauge factors were observed to decrease with the increase of the number of the laminas. The gauge factor for 5-lamina carbon fiber mat/epoxy resin composite is 5.7. The improvement in stability and the decrease in gauge factor for the laminated composite are due to the solid conductive network of this composite. The laminated carbon fiber mat/epoxy resin composites were used as smart layers on the beam surfaces, and based on their piezoresistivities, the structural deformation monitoring upon cyclic load and the damage detecting upon monotonous load were conducted ©, 2015, Journal of Functional Materials. All right reserved.


Wang R.-W.,Hubei Province Key Laboratory of Refractories and Ceramics | Wang R.-W.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Wang R.-W.,Wuhan University of Science and Technology | Liu J.,Wuhan University of Science and Technology | And 8 more authors.
Journal of Non-Crystalline Solids | Year: 2012

Amorphous ribbons of the alloy Fe63.5Co10Si 13.5B9Cu1Nb3 were prepared by the standard single copper wheel melt spinning technique in air and their crystallization kinetics was analyzed by non-isothermal differential scanning calorimetry (DSC) measurements. The crystallization activation energies (E x, Ea1 and Ea2) of amorphous ribbons calculated from Kissinger model were 448, 385 and 396 kJ/mol for the first and the second crystallizations, respectively. The Avrami exponent n was calculated from the Johnson-Mehl-Avrami (JMA) equation and was used to identify the crystallization mechanism for the amorphous ribbons. The ribbons were milled into different sized flakes, which were molded subsequently to cores using 3 wt.% epoxy as a binder. The effective permeability of the cores showed high frequency stability and increased with the size of the flakes. For the cores made from small sized flakes (- 75 μm), the quality factor was increased at high frequencies, which was attributed to the reduction in the eddy current loss. © 2011 Elsevier B.V. All rights reserved.


Han F.,Wuhan University of Science and Technology | Han F.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Zhong D.-W.,Wuhan University of Science and Technology | Zhong D.-W.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Wang J.,Wuhuan Engineering Co.
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012

It was proved from the probabilistic perspective that Bayes criterion function method based on maximum entropy principle is in accordance with the regularization method solving ill-posed problems. A new method based on information fusion and Bayes theory for model modification was established. Samples were designed with tests and the second-order response surface was adopted as the fast operation model easily modified and perfected by fully use of prior information (design code information, finite element calculation information and test information). This method could be extended to large and complicated nonlinear structures for its good computational efficiency and solution convergence. The underground powerhouse of a pumped-storage power station was employed to verify the effectiveness of the proposed method.


Zhu C.,University of British Columbia | Nicanfar H.,University of British Columbia | Leung V.C.M.,University of British Columbia | Li W.,University of British Columbia | And 3 more authors.
2014 IEEE International Conference on Communications, ICC 2014 | Year: 2014

By incorporating the advantages of cloud computing (CC) and wireless sensor networks (WSNs), the integration of CC and WSNs attracts a lot of attention from both academia and industry. However, trust and reputation management for CC and WSNs integration is a critical and barely explored issue, which could strongly prevent the cloud service users (CSUs) from choosing the desirable cloud service providers (CSPs) or hinder the CSP from selecting appropriate sensor network providers (SNPs). To fill the gap, this paper proposes a novel trust and reputation management system for CC and WSNs integration. Considering the attribute requirement of CSU and CSP as well as the cost, trust and reputation of the service of CSP and SNP, the proposed system achieves the following two goals: 1) calculate and manage the trust and reputation regarding the service of CSP and SNP; 2) help CSU choose CSP and assist CSP in choosing SNP. Evaluation results are also shown to verify effectiveness of the proposed system. © 2014 IEEE.


Wang W.-B.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Wang M.-G.,Hubei Normal University
Advanced Materials Research | Year: 2012

This paper proposes a new despeckling algorithm of SAR image based on EMD and PCA. Firstly, it approximately evaluates the noise energy in all levels of IMF according to the energy distribution model of Gaussian white noise decomposed by EMD. And then it uses PCA to decompose IMF. According to the decomposition feature of the noisy signal and the proportion of noise energy in IMF, select proper principal components to reconstruct IMF so as to further remove the IMF noise. Finally, the simulation results show that the new method can effectively delete noise, and better keep the texture details of the edges. © (2012) Trans Tech Publications.


Liu H.Y.,Wuhan University of Science and Technology | Liu H.Y.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Wang H.L.,Wuhan University of Science and Technology | Li L.,Xining Special Steel Co. | And 3 more authors.
Ironmaking and Steelmaking | Year: 2011

Ti content in specimens of 80 grade wire cord steel was measured by laser ablation inductively coupled plasma mass spectrometry. It was found that the average Ti content increased and then decreased during electrical arc furnace (EAF) tapping→refining→continuous casting. Under current control condition of 80 grade wire cord steel in Nanjing Iron and Steel United Co. Ltd (NISUCL), the calculation results in several aspects such as formation thermodynamics, solidification segregation and growth kinetics of TiN particles showed that the formation of TiN only took place in the two-phase region where the solidification ratio is greater than 98%, or in solid phase region; both solidification segregation of Ti and N increased with increasing cooling rate and the segregation tendency was greater with increasing solidification fraction. The greater the cooling rate during solidification, the smaller the size of precipitated TiN particles. The size of precipitated TiN particles is 3-7 μm, which accorded with the size measured in metallographic image of TiN inclusions found in wire rod specimens. © 2011.


Han F.,Wuhan University of Science and Technology | Han F.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Zhong D.,Wuhan University of Science and Technology | Zhong D.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | And 2 more authors.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2012

A new method for finite element model updating based on response surface method(RSM)is presented in this paper. Firstly variables are choosed based on variance analysis or priori information, then RSM is applied as a close-form multinomial which provides the relationship between concerned features and selected design variables, finally the RSM iterates for self-characteristics. Besides, the improved RSM is submitted considering the different contribution made for performance function by sample points. The improved RSM has faster convergence and fewer computation to be popularized to nonlinear problems, example verifies the effectiveness.


Yun M.,Wuhan University of Science and Technology | Yun M.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Yu B.,Huazhong University of Science and Technology | Lu J.,Wuhan University of Science and Technology | And 2 more authors.
International Journal of Heat and Mass Transfer | Year: 2010

The Herschel-Bulkley (HB) fluid is the representative fluid which may be reduced to the power-law fluid, Bingham and Newtonian fluids in appropriate conditions. In this paper, fractal models for velocity and the starting pressure gradient for HB fluid in porous media are derived based on fractal characteristics of porous media and capillary model. The proposed models are expressed as a function of fractal dimensions, porosity, maximum pore size and representative length of porous media. Every parameter in the proposed expressions has clear physical meaning, and the proposed models relate the flow characteristics of HB fluid to the structural parameters of porous media. The variation trends of fractal velocity and starting pressure gradient versus different impact factors are shown, and the analytical expressions reveal the physical principles for flow velocity and starting pressure gradient in porous media. © 2010 Elsevier Ltd. All rights reserved.


Dong-Wang Z.,Wuhan University of Science and Technology | Liang W.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process
aEngineering Plasticity and Its Applications - Proceedings of the 10th Asia-Pacific Conference, AEPA 2010 | Year: 2011

To study on dynamic characteristics of rock slope under blasting loads, both an indoor experiment method of concrete slope model and finite element model of that are adopted in this paper. The results show that not only propagation laws but also attenuation characteristics of the detonating earthquake waves on slope are different to those of level ground. That is to say, the attenuation of particle peak vibration on slope is much smaller along with blasting source distances than those of level ground, and there are vibration amplification effects at the top particles of the slope; On the other hand, not only can the damping ditch reduces the strength of peak particle vibration greatly, but also improves stress states of the slope under blasting loads. In addition, by comparing experiment results, the results of simulation are consistent with those of model test of the slope under blasting loads well.


Yun M.-J.,Wuhan University of Science and Technology | Yun M.-J.,Hubei Province Key Laboratory of Systems Science in Metallurgical Process | Yue Y.,Wuhan University of Science and Technology | Yu B.-M.,Huazhong University of Science and Technology | And 3 more authors.
Chinese Physics Letters | Year: 2010

We present a three-dimensional geometry model for tortuosity of streamlines in porous media with randomly placed cylindrical particles. The proposed model is expressed as functions of porosity and geometrical parameters with no empirical constant. This might be helpful for understanding the physical mechanism for tortuosity of streamlines in three-dimensional porous media. The model predictions are found to be in good agreement with the experimental data available. © 2010 Chinese Physical Society and IOP Publishing Ltd.

Loading Hubei Province Key Laboratory of Systems Science in Metallurgical Process collaborators
Loading Hubei Province Key Laboratory of Systems Science in Metallurgical Process collaborators