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To meet the requirements of planning and to improve accuracy and stability of traffic prediction model in the communication network for electric power, a traffic prediction method based on grey model optimized by buffer operator and particle swarm optimization (PSO) is proposed in this paper. Variable weights buffer operators are implemented for preprocessing traffic data to enhance the adaptability of gray prediction model. Taking the maximum grey correlation degree between prediction series and true series as objective function, based on the search ability of PSO, the fitness function is founded, which can determine the optimal parameters of gray model. Applying the improved model to traffic prediction in communication network for electric power, a new prediction result is drawn. The prediction result shows that the improved model has higher prediction accuracy compared with the traditional GM (1, N) model.

Aquatic plants inhibit algae through nutrient competition, sludge sedimentation and the release of allelochemicals in three ways. Investigating Pistia stratiotes L in East Lake, Shao (2001) observed removal rate of the BOD5 achieved more than 70%; the total nitrogen removal efficiency was 60%, the total phosphorus removal efficiency was approximately 70% or more, and this biochemical inhibitory effect may promote algal settlement. Ho Pool (1999) found that the Rhizoma AcoriGraminei could cause a water total nitrogen (TN) removal rate of 87.4%, a total phosphorus (TP) removal rate of 43.9%, and a dissolved oxygen (DO) increase of 26.6%. These studies suggest that through the promotion of the lake TN and TP, aquatic plants influence bio-deposition into sediments, in addition to their role in the nutrient cycling of lakes. Furthermore, many studies have shown that aquatic macrophytes can produce allelochemicals that could inhibit the growth of algae (Donk & Bund, 2002; A. Gross & Boyd, 1998; Elisabeth M. Gross, 2003; E. M. Gross & Sütfeld, 1994; Mulderij, Smolders, & Van Donk, 2006; Mulderij, Van Nes, & Van Donk, 2007).

Public building systems using mainly the roof and wall with semiconductor materials that generally a few hundred kilowatts to several megawatts, most of the power generation system, building their own electricity needs are met, excess electricity can be transmitted to the grid. The general annual solar radiation direction and the horizontal angle is the angle of inclination, and also based on the latitude of the installation area. A novel dual-axis tracking solar system is presented in this paper that can be simply manufactured , and the photovoltaic power generation is analysis from the system architecture. The mechanical and electrical characteristic is also analyzed and compared, and the proposed approach can be widely used in future wind-solar complementary system.

One of the key technologies of large-scale wind turbine composite blades developed, it relates to the aerodynamics, structural dynamics, structural testing of composite materials, process manufacturing, mold equipment technology, technical difficulty. The vast majority of the world leaves glass fiber reinforced plastic (FRP) composites manufacturing, the main consideration fiberglass / composite other materials do not have some advantages. Numerical results are presented in this paper to investigate the load pressure effect on the middle and the root of the blade. From the results of finite element analysis, leaves uneven force is very complex. The skin panels withstand normal stress caused by the bending of the left skin consider tensile strength under stress.