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Chengdu, China

Chengdu University of Information Technology is a Chinese university founded in 1951. It is a key developing provincial university joint building by China Meteorological Administration and Sichuan Province. It is the only university independently specializing in information technology in southwest China, and is the member of CDIO world organization. From 2004, It started to educate reserve army officers for strategic missile forces which named Second Artillery Corps in People's Liberation Army of the People's Republic of China . Wikipedia.

Dou L.,Sichuan Normal University | Ji X.,Sichuan Normal University | Li P.,Chengdu University of Information Technology
Optics Express | Year: 2012

The model of partially coherent annular beams with linear nonuniformity field profile in the x direction is set up. The analytic expressions for the average intensity and the centre of gravity of partially coherent annular beams with decentered field propagating through atmospheric turbulence along a slant path are derived. The propagation equation governing the position of the intensity maximum is also given. It is found that the beam non-uniformity is amended gradually as the propagation distance and the strength of turbulence increase. The centre of beam gravity is independent of both the propagation distance and the turbulence. However, the position of the intensity maximum changes versus the propagation distance and the turbulence, and is farthest away from the propagation z-axis at a certain propagation distance. When the propagation distance is large enough, the position of the intensity maximum reaches an asymptotic value which increases with decreasing the zenith angle and is largest for the free space case. When the propagation distance is large enough, the position of the intensity maximum is not on the propagation zaxis, and is nearer to the propagation z-axis than the centre of beam gravity. On the other hand, changes in the intensity maximum in the far field are also examined in this paper. © 2012 Optical Society of America. Source

Ling W.,Chengdu University of Information Technology
IEEE Transactions on Magnetics | Year: 2014

The NiCuZn ferrite (Ni0.60Cu0.24Zn 0.16Fe2O4) has been prepared by a conventional solid-reaction method and sintered at 900°C with different dopants to adapt to the low temperature cofired ceramic (LTCC) technology. Two kinds of dopants, oxide Bi2O3 (BI) and ferroelectric ceramic Bi 4Ti3O12 (BIT), are used in different amounts or combinations (2wt%BI, 2wt%BIT, 2wt%BI + 2wt%BIT, 4wt%BI, and 4wt%BIT) to promote the sintering process. Variation of microstructure and density in each sample has been analyzed. Influence of the doping mode on the magnetic properties of the ferrite has been investigated. It can be found that the ferrite doped with BI has an obvious decrease of both MS and H C in contrast with the ferrite doped with same amount of BIT. Appropriate amounts of BIT is helpful to not only increase MS, but also decrease of HC, compared with the ferrite without doping. © 2013 IEEE. Source

Junxiu A.,Chengdu University of Information Technology
Journal of Software | Year: 2011

With the rapid growth of networks digital information on the internet, the development and application of information retrieval technology is becoming inevitable. Based on the study of search engine and mobile search engine, according to the development of current technology, we experts put forward the cloud retrieval system model. The model consists of the cloud information layer, cloud retrieval cluster system, the user query box. The cloud retrieval cluster system consists of the cloud collecting layer, the cloud processing layer, the cloud index layer, the query layer of clouds, the cloud interface layer, data storage stratus layer, the cloud retrieval monitoring system, the clouds management system and scheduling system. In this paper, it is researched the function that the core level should complete and the core technology detailedly, and it has accomplished this model. The results of testing the model is shown that the system function can realize correctly, its performance is good and steady. The demonstration of this model gives the retrieval technology of massive information a scheme to develop thinking. © 2011 ACADEMY PUBLISHER. Source

Ding Y.,Chengdu University of Information Technology
Physica B: Condensed Matter | Year: 2012

The structural stability, mechanical properties and thermodynamic parameters such as Debye temperature, minimum thermal conductivities of orthorhombic-A 2N 2O (A=C, Si and Ge) are calculated by first principles calculations based on density functional theory. The calculated lattice parameters, elastic constants of Si 2N 2O and Ge 2N 2O using PBEsol function are consisted with the experimental data and other calculated values. The full set elastic constants of the orthorhombic-A 2N 2O (A=C, Si and Ge) are calculated by stress-strain method. The mechanical moduli (bulk modulus, shear modulus and Youngs modulus) are evaluated by the Voigt-Reuss-Hill approach. The orthorhombic-C 2N 2O exhibits larger mechanical moduli than the other two structures. The hardness of orthorhombic-A 2N 2O (A=C, Si and Ge) is evaluated according to the intrinsic hardness calculation theory of covalent crystal relying on Mulliken overlap population. The results indicate that the orthorhombic-C 2N 2O is a super hard material. Furthermore, the mechanical anisotropy, Debye temperature and minimum thermal conductivity of the orthorhombic-A 2N 2O (A=C, Si and Ge) have been estimated by empirical methods. The orthorhombic-Ge 2N 2O shows the lowest thermal conductivity, which may have useful applications as gas turbine engines and diesel engines. © 2012 Elsevier B.V. All rights reserved. Source

Guo J.,Chengdu University of Information Technology
Applied Microbiology and Biotechnology | Year: 2014

This paper investigated the characteristics of Cu(II) sorption from aqueous solution by using bioflocculant MBFR10543 and discussed the mechanism during the sorption process. Results have demonstrated that the removal efficiency of Cu(II) reached 96.9 % by adding MBFR10543 in two stages, separately, 1.5 × 10−2 % (w/w) in the 1.0-min rapid mixing (180 rpm) and 2.0 × 10−2 % (w/w) after 2.0-min slow mixing (80 rpm), with pH value fixed at 6.0. Cu(II) sorption process could be described by the pseudo-second-order kinetic model and the Langmuir isotherms model. The negative Gibbs free energy change indicated the spontaneous nature of the sorption. Fourier transform infrared spectra analysis indicated that functional groups, such as –OH, −COOH, C═O, and –NH2, were existed in MBFR10543 molecular chains, which had strong capacity for removing Cu(II). Furthermore, both charge neutralization and bridging being the main mechanisms involved in Cu(II) removal by MBFR10543. © 2014, Springer-Verlag Berlin Heidelberg. Source

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