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Hebei, China

Hebei University of Technology is a public university whose main campus lies in the Guangrong Dao neighborhood of the Hongqiao District in Tianjin, China. It is the first institute of technology in modern Chinese education history. It is among the first group of institutions of higher learning in the national “211-Project” to which priority is given in construction. In order to carry out the “21st Century Education Revitalizing Action Plan”. Wikipedia.

Zhang Z.H.,Hebei University of Technology
Optics and Lasers in Engineering | Year: 2012

Full-field fringe projection techniques have been widely studied in academia and applied in industrial fields because of the advantages of non-contact operation, fast full-field acquisition, high accuracy and automatic data processing. Phase data map is calculated from one or multiple captured fringe pattern images on the measured object surface, which are called as single-shot and multiple-shot 3D measurement methods. Although multiple-shot methods can give highly accurate data for measuring static objects, it could be degraded by disturbance, such as vibration and environmental noises between gap of image shot. However, single-shot methods are insensitive to vibrational noises because of capturing only one image. Therefore, various single-shot methods have been actively researched recently with the advent of new imaging and projecting devices. This paper reviews the single-shot 3D shape measurement techniques by projecting and capturing one fringe pattern image on the object surface, the wrapped phase demodulation algorithms from one captured image. The challenging problems and future research directions are discussed to advance single-shot 3D shape measurement techniques. © 2012 Elsevier Ltd. All rights reserved. Source

Yang D.-D.,Hebei University of Technology
Chinese Physics B | Year: 2014

We mainly investigate the robust networked H synchronization problem of nonidentical chaotic Lur'e systems. In the design of the synchronization scheme, some network characteristics, such as nonuniform sampling, transmission-induced delays, and data packet dropouts, are considered. The parameters of master - slave chaotic Lur'e systems often allow differences. The sufficient condition in terms of linear matrix inequality (LMI) is obtained to guarantee the dissipative synchronization of nonidentical chaotic Lur'e systems in network environments. A numerical example is given to illustrate the validity of the proposed method. © 2014 Chinese Physical Society and IOP Publishing Ltd. Source

Runhua T.,Hebei University of Technology
Computers in Industry | Year: 2011

Ill-structured problems are difficult types to solve. When this type of problem is faced in an innovation pipeline, a technical obstacle emerges. Comparison between the definitions of ill-structured and inventive problems in theory of inventive problem solving (TRIZ) shows that the latter is a sub-set of the former in engineering. As a result, computer-aided innovation (CAI) systems (CAIs) based on TRIZ can be applied to solve some ill-structured problems that appear in an innovation pipeline. A model including two technical obstacles is developed for an innovation pipeline, and a case study is carried out to show how to eliminate the technical obstacles using the model. © 2010 Elsevier B.V. All rights reserved. Source

Min C.-H.,Hebei University of Technology
Journal of Power Sources | Year: 2010

A three-dimensional, two-phase and non-isothermal model of a proton exchange membrane fuel cell (PEMFC) based on the previously developed model is established using the two-fluid method. This two-phase model considers the liquid water transport in both cathode and anode sides and accounts for the intrinsic heat transfer between the reactant fluids and the solid matrices. The latent heat of water condensation/evaporation is considered in the present model. The numerical results demonstrate that the lower cathode humidity is beneficial for cell performance. In the anode side, the water vapor can be condensed at high current density because the water vapor transport is less than the hydrogen consumption rate. Near the catalyst layer, the reactant fluid temperature is higher than the solid matrix temperature, and far from the catalyst layer, the temperature difference between the reactant fluid and the solid matrix decreases. Near the channel, the reactant fluid temperature is lower than the solid matrix temperature. © 2009 Elsevier B.V. All rights reserved. Source

Mi Y.-J.,Hebei University of Technology
International Journal of Theoretical Physics | Year: 2012

We study the dynamics of classical correlation and quantum discord of two-qubit system interacted with the thermal reservoir. Special attention is paid to the difference between the entanglement and quantum discord when considering the influences of the nonzero mean photon number and quantum fluctuation of the vacuum. It is shown that in the same range of the physical parameters, the factors leading to the entanglement sudden death only accelerates the decay of quantum discord, and the quantum discord can last for an infinite period when the entanglement disappears. So the quantum discord is more robust than entanglement under this decoherence environment, and quantum discord is a more general measure of quantum correlation than entanglement. © 2011 Springer Science+Business Media, LLC. Source

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