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Mudanjiang, China

Meng X.-X.,Mudanjiang Teachers College | Tian S.-G.,Mudanjiang Medical University
19th International Conference on Industrial Engineering and Engineering Management: Engineering Management | Year: 2013

In the reason of the deficiencies in their own areas, traditional costing methods cannot accurately measure the cost of logistics. It urgently asks us to find new methods to measure logistics cost accurately and effectively. The application of activity-based costing to logistics management is keeping with this request. The principles of activity-based costing are expounded firstly, then this text intends to identify that activity-based costing have also its applicability in the logistics cost management in comparison with traditional costing. Finally two methods are compared and result of testing is analyzed. This text is focused on the application of activity-based costing to calculate logistics cost, which solves the problem of how to combine activity-based cost with practice. © 2013 Springer-Verlag Berlin Heidelberg.

Sun J.,Harbin Normal University | Sun W.,Harbin Normal University | Zhao L.,Mudanjiang Teachers College | Li J.,Harbin Normal University | And 2 more authors.
Guangxue Xuebao/Acta Optica Sinica | Year: 2012

Based on the predecessor's theoretical achievements, probabilistic analysis for realizing terahertz (THz) radiation of lasers by strict calculation method is given. The distributions of conduction subband structure and the electron wave function of GaN-based three-level quantum cascade lasers are solved with the transfer matrix method by Matlab, the polarization field of material is analyzed detailedly. The relationships among dipole matrix element, applied external electric field, the barrier layer of Al composition and energy difference of conduction subband in near-resonant conditions are calculated, and their effects on properties of lasers are studied. The analysis of the results shows that realizing stimulated radiation is very strict, it is proper that the composition of Al is 0.15 or 0.16, and the external electric field intensity is greater than 63 kV/cm, but is not too large. In this case, the near-resonant conditions can be satisfied, so that population inversion is realized to reach THz quantum cascade lasing. While the largest dipole matrix element is obtained at the composition of Al of 0.15 and the external electric field intensity of 69.0 kV/cm, indicating that transition probability is also the largest. It is beneficial for the properties of lasers, thus the preferable active region can be constructed for quantum cascade lasers.

Shao Y.,Jilin University | Shao Y.,Mudanjiang Teachers College | Guan J.,Jilin University | Wu S.,Jilin University | And 3 more authors.
Microporous and Mesoporous Materials | Year: 2010

Two acid-base bifunctional mesoporous materials Benzyl-APS-S-SBA-15 and Anthracyl-APS-S-SBA-15 (APS: (3-trimethoxysilanyl-propyl)-amine) were successfully synthesized by a direct synthesis method. The influence of steric hindrance upon prevention of interaction between acid and base was investigated by using two different secondary amines, benzyl-(3-trimethoxysilanyl-propyl)-amine and anthracyl methyl-(3-trimethoxysilanyl-propyl)-amine. X-ray diffraction (XRD), N2 adsorption, thermogravimetric analysis (TGA), scanning electron micrographs (SEM), transmission electron micrographs (TEM), elemental analysis, back titration, and 29Si magic-anglespinning (MAS) NMR were employed to characterize the synthesized mesoporous bifunctional materials. The experimental results indicate that the guests can be well dispersed in the channel of SBA-15, and the obtained materials exhibit excellent acid-basic properties, which make it possess high activity for the aldol condensation of acetone with 4-nitrobenzaldehyde. © 2009 Elsevier Inc. All rights reserved.

Wang L.,Beijing Institute of Technology | Wang L.,Mudanjiang Teachers College | Shi F.G.,Beijing Institute of Technology
Iranian Journal of Fuzzy Systems | Year: 2010

An L-fuzzifying matroid is a pair (E,I), where I is a map from 2E to L satisfying three axioms. In this paper, the notion of closure operators in matroid theory is generalized to an L-fuzzy setting and called L-fuzzifying closure operators. It is proved that there exists a one-to-one correspondence between L-fuzzifying matroids and their L-fuzzifying closure operators.

Xu H.,Mudanjiang Teachers College
Proceedings - 2010 IEEE International Conference on Intelligent Computing and Intelligent Systems, ICIS 2010 | Year: 2010

In this paper, we further analyze and prove the stability and convergence of the proposed dynamic system. We get that this network is complete stable, which can be used to solve an associated constrained convex optimization problem. Meanwhile, in order to show the wider domain of the method for stability used in this paper, we propose another neural network to solve a class of degenerate quadratic program. This network has a simpler structure than the other networks used to solve this class of problem. Furthermore, by introducing two new Lyapunov functions, we get that, for any initial points, all the obtained results in this paper remain valid, which improve the existing ones. Particularly, we also get some finite time convergence and exponential convergence results. Simulation examples show the correctness of the results in this paper and the effectiveness of the proposed neural networks to solve the two classes of optimization problems. ©2010 IEEE.

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