Wang L.,Chizhou University
Micro and Nano Letters | Year: 2017
In this study, nickel oxide (NiO) thin films are deposited on three-dimensional nickel foam by a facile two-step method for application in Li-ion batteries (LIBs). These NiO films on Ni foam are tested as Li-ion batteries anodes. The rough NiO thin film with the shortest deposition time (3 min) shows the best Li-ion battery performance. A high specific capacity of 917 mAh g-1 is achieved at a charge-discharge current of 0.5 C and even after 100 cycles, a capacity of 838 mAh g-1 is still retained. The electrode also shows a good rate capability. This study shows that NiO electrode prepared with this method can be a promising candidate for LIBs anodes materials. © 2016 The Institution of Engineering and Technology.
Jing W.,Chizhou University
Agro Food Industry Hi-Tech | Year: 2017
Considering the continuous updating of modern science and technology, the field of enterprise risk control has also changed considerably. Preventing the loss of excellent personnel has gradually become one of the primary objectives of enterprises. Thus, in this paper, prediction of enterprise personnel turnover risk based on the Bayesian model is studied as well as the gradient level of enterprise personnel. In addition, the concept of the Bias model is also introduced and a Bayesian model for enterprise personnel turnover control scheme is derived. Therefore, the evaluation results show that the proposed framework effectively helps enterprises to avoid the risk of personnel loss.
Chen Y.,South China Normal University |
Liu L.-B.,Chizhou University
Communications in Computational Physics | Year: 2016
In this paper, we study the numerical solution of singularly perturbed time-dependent convection-diffusion problems. To solve these problems, the backward Euler method is first applied to discretize the time derivative on a uniform mesh, and the classical upwind finite difference scheme is used to approximate the spatial derivative on an arbitrary nonuniform grid. Then, in order to obtain an adaptive grid for all temporal levels, we construct a positive monitor function, which is similar to the arc-length monitor function. Furthermore, the I-uniform convergence of the fully discrete scheme is derived for the numerical solution. Finally, some numerical results are given to support our theoretical results. Copyright © Global-Science Press 2016.
Qian L.-W.,Nanjing University |
Qian L.-W.,Chizhou University |
Wang X.,Chizhou University |
Zheng H.-G.,Nanjing University
Crystal Growth and Design | Year: 2012
Three-fold dendrites of Ce(OH)CO 3 with multilayer caltrop have been synthesized on a large scale by means of a complexing agent assisted solution route. The shape of these as-prepared architectures can be tuned effectively by controlling the reaction conditions, such as reaction time and the molar ratio of complexing agent/Ce 3+. As a typical morphology, the growth process of 3-fold dendrites of Ce(OH)CO 3 with multilayer caltrop has been examined, and a possible mechanism is discussed. The phase and morphology of the as-prepared product have been characterized by means of powder X-ray diffraction (XRD), (high resolution) transmission electron microscopy (HRTEM), and scanning electron microscopy (SEM). The morphology of dendrites is sustained after thermal decomposition-oxidation Ce(OH)CO 3 to CeO 2. To extend this method, La(OH)CO 3 and Eu 3+/Ce(OH)CO 3 dendritic structures can also be achieved at similar reaction conditions. After similar heat treatment in an oven, their dendritic structures are also retained. La(OH)CO 3 completely transforms into La 2O 2(CO 3), and Eu 3+/Ce(OH)CO 3 changes to Eu 3+/CeO 2. The photoluminescent properties of Eu 3+/Ce(OH)CO 3 and Eu 3+/CeO 2 dendrites have also been investigated. This work sheds some light on the design of well-defined complex nanostructures. © 2011 American Chemical Society.
Xu Y.-J.,Chizhou University |
Meng X.-G.,Liaocheng University
International Journal of Theoretical Physics | Year: 2013
We analytically study the Wigner function (WF) for the two-variable Hermite polynomial state (TVHPS) and the effect of decoherence on the TVHPS in thermal environment. The nonclassicality of the TVHPS is investigated in terms of the partial negativity of the WF which depends on the polynomial orders m,n and the squeezing parameter r. We also investigate how the WF for the TVHPS evolves in the thermal environment. At long times, the TVHPS decays to thermal, a mixed Gaussian state, within the thermal environment. © 2013 Springer Science+Business Media New York.
Ren G.,Huainan Normal University |
Du J.-M.,Huainan Normal University |
Yu H.-J.,Huainan Normal University |
Xu Y.-J.,Chizhou University
Journal of the Optical Society of America B: Optical Physics | Year: 2012
In this paper, we introduce the Hermite polynomial's coherent state (HPCS) |α)H, which is defined as Hn(X)|α) up to a normalization constant and where Hn(X) is the coordinate operator's Hermite polynomial of order n and |α) = exp(-(1/2)|α|2 + aa†)|0). This state may be produced by the superposition of some different photon added coherent states when n = 2. The mathematical and physical properties of HPCS are also studied. It is shown that HPCS has remarkable nonclassical state features such as sub-Poissonian and squeezing properties. © 2012 Optical Society of America.
Wei H.,Chizhou University
International Journal of Simulation: Systems, Science and Technology | Year: 2016
This paper performs feature analysis and image understanding on an image principle function and sparse coefficients of different artistic styles, acquired by sparse coding algorithms. Then the obtained features are used to study classification implementation of different artistic works. We adopt absolute value of kurtosis as sparse measuring standard of parameter component ensuring the sparsity and independency of coefficients. Simultaneously, fixed parameter component variance items are introduced to target function, to ensure the balance between minimal image reconstruction error and sparse penalty function. We also adopt Gabor wavelet to initialize Sparse Coding (SC) feature principle function to search optimal basis vectors, which further raises convergence speed of SC network. The experiments verify the sparse coding algorithm maximized by kurtosis which can be used to classify styles of artistic works. © 2016, UK Simulation Society. All rights reserved.
Hong W.,Chizhou University
Chemical Engineering Transactions | Year: 2015
Using improved EF Model, this paper calculated the Sustainable Development level of Anhui province between 2004 and 2013.The results show that (1) the total Per capita EF was constantly increasing in Anhui province from 1.2413 hm2 in 2004 to 1.6157 hm2 per person in 2013, (2) the total Per capita EC is increasing from 0.2471 hm2 to 0.2640 hm2 per person, which is much smaller than the total Per capita EF. And the ecological deficit shows Anhui province is under huge ecological pressure and the economic and social development is unsustainable; (3) the EF diversity index rose from 1.2876 hm2 to 1.3902 hm2 per person, which shows that the EF distribution is increasingly imbalanced and the ecological system is in steady; (4) the sustainable development index increased from 1.5524 hm2 to 2.2460 hm2 per person, which shows that Anhui ecological capacity is gradually improving despite its ecological deficit. Copyright © 2015, AIDIC Servizi S.r.l.
Liu J.-K.,East China University of Science and Technology |
Luo C.-X.,East China University of Science and Technology |
Wang J.-D.,East China University of Science and Technology |
Yang X.-H.,Chizhou University |
Zhong X.-H.,East China University of Science and Technology
CrystEngComm | Year: 2012
Symmetrical silver phosphate (Ag3PO4) crystals with porous structure were grown by a facile controllable route in aqueous solution. The Ag3PO4 crystals have a cubic-type structure and the morphologies are distinctive under different conditions. The crystals had high purity, were well-crystallized and were free of secondary phases by powder X-ray diffraction, IR, Raman spectra, scan electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). It is interesting that the different crystal faces of the crystals have high physical-chemical-biological activity and large surface areas, so as to act as high activity micro-reactors (HAMs). The HAMs can effectively improve the photocatalytic activity and bacteriostatic activity of the Ag3PO 4 crystals. Furthermore, we proposed a possible growth mechanism and detailed morphology transformation process of Ag3PO4 crystals with different properties. This journal is © The Royal Society of Chemistry.
Chen X.M.,Chizhou University
Applied Mechanics and Materials | Year: 2013
According to the rich practical experience of the effective English teaching field, scientific research experience and the actual investigation, the author comprehensively analyzed the present situation of current college English listening teaching, conducted the English teaching mode that based on podcasting technology, used bilateral W-test of effective results, and the count materials were dealt with μ2 test, eventually the author obtained that the achievement of college English listening teaching based on podcasting technology was significant, it could effectively improve the level of English listening, and at the same time it provided the new teaching mode and scientific path for the college English listening teaching. © (2013) Trans Tech Publications, Switzerland.