Jia S.,Northeast Dianli University
DRPT 2011 - 2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies | Year: 2011
Wind power, among all renewable resources, is the most promising and booming technology. With the increasing wind power capacities, power system planners and operators are facing many new challenges because of its variability and average predictability. An accurate wind power forecasting tool is therefore essential for economical and reliable operation of a power system with high level of wind penetration. This paper proposes a novel short term wind forecasting model based on ensemble empirical mode decomposition and combination of support vector machines. © 2011 IEEE.
Li J.,Beijing Normal University |
Deng G.,Northeast Dianli University |
Li H.,Dalian University of Technology |
Zeng W.,Beijing Normal University
Information Sciences | Year: 2012
In this paper, we introduce an axiomatic definition of the similarity measure of intuitionistic fuzzy sets (IFS) that differs from the definition of Li . The relationship between the similarity measure and the entropy of IFS is investigated in detail. Six theorems on how the similarity measure could be transformed into the entropy for IFS and vice versa are proposed based on their axiomatic definitions. Some formulas have been proposed to calculate the similarity measure and the entropy of IFS. Finally, sufficient conditions to transform the similarity measures to the entropy for IFS and vice versa are given. © 2011 Elsevier Inc. All rights reserved.
Yin L.,Northeast Dianli University
International Journal of Advancements in Computing Technology | Year: 2011
In this paper, we have proposed a novel method for image segmentation, which uses region-based active contour model. The advantage in using fixed window for local information combined with the global information is a fast computation time while obtaining accurate results due to the global term. Another interest of such model is the robustness to initial contour. The experimental results have shown that our method is efficient.
Peng H.K.,Northeast Dianli University
Applied Mechanics and Materials | Year: 2014
Ignoring the coordinated development and the natural environment carrying capacity plight caught the traditional development model, emphasizing the natural environment and the economy to adapt to the pursuit of harmony between man and nature, sustainable development become a wise choice, eco-design of the built environment is a human realization important tool for sustainable development. Sustainable eco-design of the built environment and the long-term goal of the current interests combine to maintain maximum coordination with the natural environment, not only become the reality of human needs, while also considering the needs of the human potential. Ecological construction and environmental protection around the significance of in-depth discussion of the needle eco-building for sustainable development thinking and practice of environmental design, environmental design proposed ecological architecture reflects the theme of sustainable development, while recycling is designed to achieve low carbon, environmentally friendly eco-building environment design approach. © (2014) Trans Tech Publications, Switzerland.
Liu C.-G.,Northeast Dianli University
Molecular Physics | Year: 2011
Density functional theory (DFT) was employed to calculate the bonding feature, electron spectrum, and redox properties of a dumbbell-shaped polyoxometalate (POM) cluster, [Re2III(PW 11O39)2]8-). Our DFT calculations confirm that the quadruple bond interaction between two ReIII centers consists of σ, 2π, and δ orbital overlaps, and the strength of the bonding interactions is in the order σ-bond> π-bond>δ- bond. Time-dependent (TD) DFT calculations suggest that this cluster possesses one strong and four weak absorption bands between 0.7 and 2.5 eV. Excited state calculations show that the Re-Re bond length increases when one electron of the Re-Re bonding δ orbital is shifted to the Re-Re δ* antibonding orbital. Molecular orbital predictions and spin unrestricted calculations indicate that the two Re atoms form the reduced center. The Re-Re bond length increases in one- and two-electron reduction processes because the Re-Re δ* antibonding orbital becomes occupied. However, these changes in the Re-Re bond length in excitation and reduction processes are not substantial because of the weak bond. The substitution effect of the central tetrahedron heteroatom of the POM ligand affects the Re-Re bond length, with the Re-Re distance decreasing with the substitution of X from Al to S, Al (2.345 Å) > Si (2.310 Å) > P (2.282 Å )> S (2.257 Å ). © 2011 Taylor & Francis.