In this paper, an energy-balance routing strategy is proposed for prolonging the network lifetime for wireless sensor networks with scale-free characteristic. In order to avoid the nodes with high traffic using up their energy too early and prolong the network lifetime, the new routing strategy adopts the shortest path routing algorithm on weighted wireless sensor networks, where the weight values are calculated based on betweenness centrality of the nodes. Since the nodes with large betweenness centrality consumed energy more quickly, the network lifetime can be prolonged by distributing energy consumption from nodes with large betweenness centrality to nodes with small betweenness centrality by increasing weight value on every link that connects the node with the highest betweenness centrality to other nodes. Simulation results show that the proposed routing strategy is better than the shortest path routing as regards extending the network lifetime and balancing the energy consumption.

Application of coil diameter calculation is very important in the industrial field. The demanding for the precision of control is increasingly strict. There are three methods to achieve a higher precision. They are the Count-method, Linear /Angular Velocity and Distance Calculation respectively. In the process of coiling and uncoiling, advantages and disadvantages are existed. There are different requests for realization of the functions as well. In the Siemens PLC S7-300 control system, these three methods can be used to achieve a higher precision of coil diameter calculation and control. Different improvements and adjustments, according to methods, are given in the process of the test. Some algorithm has been optimized. Finally, by using the three algorithms, the dynamic change of roll diameter can be calculated and meet the need in the course of steel strip.

In order to solve the problem of small storage space and low calculation power in lighting dimming system for wireless sensor networks, a light dimming algorithm based on users activities for wireless sensor networks is proposed. It adopts linear programming to get the optimal solution of the light dimming model and get a relatively optimal illumination adjustment vector. Experiment results indicate that the lighting system has the lower energy consumption and achieve the goal of energy saving and emission reduction using the proposed light dimming algorithm.

For the blank of the recommender system for chinese recipes, this paper uses OWLS-WSDL to build a semantic reasoning-based chinese recipe recommender system. This system through the tool of Protégé to establish the ontology of chinese recipes and then add rules for ontology reasoning. On this basis bring out a catering algorithm, using Euclidean distance and Jaccard to calculate the similarity between the dishes. According to the similarity as well as user preference, provides a quick means of siding dishes for users.