Abstract-In order to address the issues of uneven energy dissipation and uniform cluster coverage in wireless sensor networks (WSNs) of frozen food, we developed a load balancing and uniform coverage clustering (LBUCC) algorithm to find an efficient way to generate clusters. Considering node density and the coverage radius of cluster heads, the nearest neighbor clustering algorithm was adopted to cluster the sensor network. On the basis of the number of neighbors and the residual energy of nodes, the LBUCC algorithm ensures the equal distribution of cluster head responsibility among sensor nodes and performs well in periodic data gathering with selected cluster head. As the storage and distribution of frozen food is frequent, the clustering strategy was proposed for dynamic topology in this paper. The LBUCC algorithm was compared with LEACH-C and DHAC algorithms which are well-known in using centralized control algorithm to select cluster head. The simulation results demonstrate that the LBUCC algorithm has longer network lifetime and uniform coverage than the clustering protocols LEACH-C and DHAC do.
Keywords-Frozen food, Wireless sensor networks, Uniform clustering, even energy dissipation
IntroductionFast-frozen food is the food that can be preserved long at -18 °C or lower after prefreezing preparation at -30 °C~-40 °C in an equipment. In modern freezing technology, the food temperature can be reduced to below its congealing point in the shortest possible time, with all or most of moisture in the food turning into ice crystal, so that there will be insufficient liquid water for microorganisms and endoenzyme to work. Moreover, the lower storage temperature can ensure the quality of food during the freezing process and reserve the original freshness, color, flavor and nutrition of the food.Fast-frozen food is maintained at a desired low-temperature range during production, storage, transportation and selling, which is called cold chain. The unbroken cold chain is vital to the quality of fast-frozen food. At home, the cold-chain equipment serving for food product manufacturing and logistics are independent of each other, connecting to different networks. As a result, the cold chain is interrupted at times, iJOE
The filter-rods were supplied through compressed air conveyed to cigarette-maker by transmitter in my factory. Usually, each maker has two feed-pipes, it adopts fixed and one-to-one fashion, with the flexible manufacturing system extending, and its original fashion unable to satisfy the needs of a wide range of cigarette brands already, so it cry for a viable and reliable substitute. This paper creatively bring forward the optimized fashion of duct net about filter-rods based on topology structure, it adopts Freuds algorithm and improved-separated algorithm in order to achieve the optimized route, it has a apparent effect to improve the transport stability and reduce the transport time of filter-rods.
The scene is considered as the management foothold of production, technology, quality, equipments, safety, and environment for workshop. Optimizing the scene management is not only a necessity for enhancing diathesis and strengthening development ability, but also a consciousness of strengthening the management involvement of employees. Therefore, scientific optimization of scene management is an inevitable requirement for promoting the overall management level.
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