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—To solve the problem of energy saving in the design of wireless sensor networks, a new maximum lifetime routing algorithm was proposed based on uneven cluster, linear programing and fuzzy set theory (UCLF) in wireless sensor networks, which formulated the system maximum lifetime problem as a linear programming problem and selected cluster head based on(More)
Hierarchical self-assembled hollow spheres (HS) of tungsten oxide nanosheets have been synthesized via a template-free hydrothermal method. Morphology evolution of the products is determined by the amount of H2C2O4 (oxalic acid) which serves as chelating agent. Structural features of the products were characterized by X-ray diffraction (XRD), and morphology(More)
  • Jinwei Li
  • 2010
With the development of national economy, the construction of highway network makes astounding advances. The province highway network is evolving after some years’ construction. With the formation of the road network, the security issue of highway toll network is becoming prominent. In this paper, the status and the network security issue of the(More)
  • Jinwei Li
  • 2010
With the development of computer network technology, people gradually pay more attention to the network information security. More and more advanced technologies are being used to solve this issue. In this paper, the real-time protected management system of broadband network information safety in unified controlling platform is presented. This system(More)
With the rapid progress and development of society and scientific research and development, the hysteresis quality of Digital library document retrieval service platform has affected the innovation ability of scientific research at home and abroad to some extent. In order to improve the efficiency of scientific communication, information sharing and the(More)
The implementation of new methods for fast classification of seeds is of major technical importance in the large-scale investigation of seeds identification. A few indices with biological significance were used to identify rapeseed type and variety. The plumpness and the plumpness ratio of rapeseed were extracted by using the variation coefficient of radius(More)
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