Time filter

Source Type

Jiao Y.,Harbin Institute of Technology | Jiao Y.,Shanxi University of Finance and Economics | Zhao Q.,Harbin Institute of Technology | Jin W.,Harbin Institute of Technology | And 2 more authors.
Bioresource Technology | Year: 2011

In this study, specialized bacteria were domesticated and cultivated with polluted stream water. The bioaugmentation of specialized bacteria would significantly enhance the removal efficiency of TN and NH 4 +-N from 25.9% to 50.3%, and from 34.5% to 60.1%, respectively. Concomitant increases in the number of microbial communities and the proportion of nitrifying bacteria were also identified by the most probable number (MPN) method. PCR-DGGE profiles revealed that the bacterial community could be successfully enriched and the ammonia-oxidizing bacteria communities were shown predominant by the species of Nitrosomonas. The biological contact oxidation ditch (BCOD) system augmented with specialized bacteria can be a viable alternative for treating polluted stream water to achieve improved nitrogen removal. © 2010 Elsevier Ltd.

Liu G.,Dalian University of Technology | Huang Z.,Dalian University of Technology | Wang L.,Dalian University of Technology | Sun W.,Dalian University of Technology | And 2 more authors.
Surface and Coatings Technology | Year: 2013

In this paper, the effects of Ce4+ concentration on the structure and corrosion resistance of electroless deposited Ni-Cu-P coatings were investigated using microscopy, energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction spectrometer (XRD), polarization curve (PC) and electrochemical impedance spectroscopy (EIS). The results show that the proper addition of Ce4+ can apparently refine the grain size and make the coating surface denser and more uniform, resulting in the enhancement of corrosion resistance of Ni-Cu-P coatings in the flue gas condensate. When the Ce4+ concentration is 8mg/L, the corrosion current density of Ni-Cu-P coating was reduced by nearly 60% as compared to that prepared without Ce4+ in the bath. However, the excessive addition of Ce4+ can degrade the homogeneity, resulting in the decrease of the corrosion resistance of Ni-Cu-P coatings. © 2013 Elsevier B.V.

Ding M.,Beijing Institute of Civil Engineering and Architecture
IET Conference Publications | Year: 2011

This thesis advocates the use of passive architecture design in combination with active energy-saving device design to achieve optimum design of thermal environment and energy-saving of office building. It describes the measures of optimum design of thermal environment and energy-saving in detail, from the aspects of the site design, architecture design, envelop design, effective use of solar energy, water loop heat pump system, and so on.

Xu Y.,Beijing Institute of Civil Engineering and Architecture
IET Conference Publications | Year: 2011

This paper, by introducing the typical dwelling spaces near rail transit systems in Singapore, Hong Kong and other cities, analyses these urban patterns based on the concept of a 'livable city'. The preliminary conclusions may serve as future models for megacities in China.

Lu Y.H.,University of Science and Technology Beijing | Wang J.P.,Beijing Institute of Civil Engineering and Architecture | Shen Y.G.,City University of Hong Kong
Applied Surface Science | Year: 2011

Two nanocomposite Ti-Cx-Ny thin films, TiC 0.95N0.60 and TiC2.35N0.68, as well as one pure TiN, were deposited at 500 °C on Si(1 0 0) substrate by reactive unbalanced dc-magnetron sputtering. Oxidation experiments of these films were carried out in air at fixed temperatures in a regime of 250-600 °C with an interval of 50 °C. As-deposited and oxidized films were characterized and analyzed using X-ray diffraction (XRD), microindentation, Newton's ring methods and atomic force microscopy (AFM). It was found that the starting oxidation temperature of nanocomposite Ti-Cx-Ny thin films was 300 °C irrespective of the carbon content; however their oxidation rate strongly depended on their carbon content. Higher carbon content caused more serious oxidation. After oxidation, the film hardness value remained up to the starting oxidation temperature, followed by fast decrease with increasing heating temperature. The residual compressive stress did not show a similar trend with the hardness. Its value was first increased with increase of heating temperature, and got its maximum at the starting oxidation temperature. A decrease in residual stress was followed when heating temperature was further increased. The film surface roughness value was slightly increased with heating temperature till the starting oxidation temperature, a great decrease in surface roughness was followed with further increase of heating temperature. © 2010 Elsevier B.V. All rights reserved.

Zhang S.H.,Beijing Institute of Civil Engineering and Architecture | Zhang J.,China Machinery TDI International Engineering Co.
Applied Mechanics and Materials | Year: 2014

This article discussed the factors that affect the lifetime of catalyst. For the lifetime of catalyst about catalytic combustion burner III 1100 hours were obtained. The local surface temperatures of monolith, the gas temperature inside channels and pollutant concentrations were measured. The ageing of catalyst to the change of local surface temperatures and gas temperature was approached and its affecting factors were analysed. This will improve the working conditions of catalytic combustion burner in future, and prolong its lifetime of catalyst. © (2014) Trans Tech Publications, Switzerland.

Li L.,Beijing Institute of Civil Engineering and Architecture | Yan Q.,Beijing Institute of Civil Engineering and Architecture
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2012

The thermal performances of the paraffin concrete wall and the traditional wall were analyzed by using ANSYS software. Through the simulation, the change laws of the temperature and the thermal flow of the other side of the walls when heating on one side of the walls were achieved, and compared with the experimental results. Energy-saving effect and feasibility of phase change material walls were studied by the contrasting analyze. The change laws of the constant temperature time of the PCM walls were achieved. The results showed that numerical simulation agrees well with the experimental test, so the simulation method is feasible. Compared with the traditional wall, the temperature change of PCM wall is more gently, and the thermal fluctuation is smaller, and brings delay. Raising latent heat and heat conductivity is the main way to prolong the material constant temperature time, and it is beneficial to the storage effect of the phase-change material in the wall.

Li B.,Beijing Institute of Civil Engineering and Architecture
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2012

This paper review and discuss how to solve the permeability of unconfined aquifer and confined aquifer, with the basis of the Dupuit formula and pump tests. For the unconfined aquifer and confined aquifer, which do not meet the Dupuit basic assumptions, the paper do some discussion how to calculating the permeate coefficient of the aquifer by stability pump tests.

Wei C.,Beijing Institute of Civil Engineering and Architecture | Li Y.,Beijing Institute of Civil Engineering and Architecture
2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings | Year: 2011

For people improving the energy-saving performances of buildings, the applications of information communication, computer network, automation control and etc. are the current building energy-saving technologies. They form with a serial of technique measures for buildings with energy management systems running implementation and intelligent monitoring. This paper introduces and analyzes the information technology in building energy-saving. For building energy-saving on the demand for intelligent building energy monitoring, this paper proposed a system framework of Building Energy Monitoring and Analysis System based on the Internet of things, which has some enlightening in Building energy consumption further to achieve real-time monitoring and control, and improve the energy-saving of intelligent building. © 2011 IEEE.

Liang N.-S.,Beijing Institute of Civil Engineering and Architecture | Qi C.-Z.,Beijing Institute of Civil Engineering and Architecture
Yantu Lixue/Rock and Soil Mechanics | Year: 2010

The dynamic motion equations of underground structure under horizontal seismic action are obtained. The transcendental equation for the determination of solution coefficients is deduced by using Laplace integral transform method and linking conditions of structure members. Using inverse Laplace integral transform method the equations for the determination of the displacements of the structure and the poles of the transformation parameters of the Laplace transform are obtained. The further study shows that a special relationship exists between the transformation parameters of Laplace transform and natural frequency of structure. To avoid the difficulty in determining the coefficients of the solution and the poles of the transformation parameters of the Laplace transform in solving the transcendental equation, the authors suggest that the frequency of structural system is figured out firstly by numerical methods; then the structural displacement and internal forces are obtained by using the residue theorem of inverse Laplace transform.

Loading Beijing Institute of Civil Engineering and Architecture collaborators
Loading Beijing Institute of Civil Engineering and Architecture collaborators