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Harbin, China

Tao L.,Harbin University
Advanced Materials Research | Year: 2011

The adsorption and decolorization of water-soluble azo dye(Eriochrome Black T) was investigated based on eggshell membrane. The effect of adsorption time, pH value, temperature as well as the dosage of eggshell membrane on the decolorization of Eriochrome Black T was studied. It is indicated from the experimental results that the azo-dye adsorption with eggshell membrane should be carried out in acidic solution. At the optimum conditions, 95% of Eriochrome Black T could be removed. In this study, the dumped eggshell membrane can be utilized to solve the pollution problem of dye wastewater, which will offer us a new way for utilization of eggshell membrane and treatment of wastewater. © (2011) Trans Tech Publications.

Liu Z.,Jilin University | Liu Z.,Harbin University
Nonlinear Analysis: Real World Applications | Year: 2013

In this paper, we obtain sufficient criteria for the existence of periodic solutions to deterministic SIR and SEIR epidemic models with modified saturation incidence rates by means of using the continuation theorem based on coincidence degree theory, and we show that the solution is unique and globally stable. Second, we discuss their corresponding stochastic epidemic models with random perturbation have a unique global positive solution respectively, and we utilize stochastic Lyapunov functions to investigate the asymptotic behavior of the solution. © 2012 Elsevier Ltd. All rights reserved.

Zang Z.,University of Shizuoka | Zhang Y.,Harbin University
Applied Optics | Year: 2012

The optical performances of the all-optical switching based on Yb3-doped fiber Bragg grating (FBG) are investigated under the case of self-phase modulation (SPM) and cross-phase modulation (XPM). For the SPM case, the optical bistability of FBG under different parameters is investigated. It shows that the width of the hysteresis loop and threshold switching power are strongly dependent on the fiber grating length, fiber grating detuning, and coupling constant. For the XPM case, the expressions of the threshold switching power in the different detuning range are given. The influence of parameters about different detuning and coupling constant to the threshold switching power and extinction ratio are also studied. In comparison with the SPM case, the switching power of FBG under XPM case can be reduced to less than 20 mW by optimizing the parameters of FBG. © 2012 Optical Society of America.

Li R.,Harbin University
Communications in Computer and Information Science | Year: 2011

In the context of sustainable development theory,the creation of green hotel has become the inevitable trend of hotel industry development.This paper takes green hotel in china as an example,studies on the measures for energy saving, such as adopting advanced technology, green procurement,green room,green food, green service, government's economic policy support, and so on. © 2011 Springer-Verlag Berlin Heidelberg.

Yang N.,Harbin University
Applied Mechanics and Materials | Year: 2014

The integration of Web technology to build collaborative learning environment, and systems analysis of Web technology to support collaborative learning theory, technical infrastructure, integration of Web and the advantages of collaborative learning is proposed mode of Web technology and collaborative learning environment architecture model. Finally, Google cloud computing applications - GoogleApp Engine and Google Apps interpreted as an instance of the Web and cloud computing technology is how to integrate, as well as collaborative learning environment integrated collaborative learning environment, as compared with the traditional strengths lie, and given based on Google Apps web collaborative learning strategies. Web2.0 and demonstrated the feasibility of integrating cloud computing technology, technical support for future research to broaden the thinking and learning. © (2014) Trans Tech Publications, Switzerland.

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