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We propose an inspection and replacement policy for a mission-based system based on the delay time concept, which assume the system state to be either normal or defective before failure. Such a system executes missions successively with random durations, and inspections are schemed at every completion of missions (random inspection) as well as periodic times to identify the defective state. Random...
Edge contraction simplification based on DEM terrain algorithm is proposed as a new terrain simplification algorithm which is based on DEM terrain data characteristics. The algorithm introduces the gradient of triangle, and combines with gradient and the length of edges as weight of the vertex to represent the importance of a vertex. By using the vertex weight, we can constrain the region being affected...
The objective of this investigation was to study effects of Cr(III) stress on antioxidative system in Leersia hexandra Swartz. Seedlings of L. hexandra were grown in pots with five Cr(III) levels (0, 5, 30, 60 and 100 mg/L), Cr(III) showed inhibition on the growth of L. hexandra, and the inhibition was increased with the increase of concentration, 100 mg/L was the optimal concentration. L. hexandra...
In this paper, the quantitative evaluation model- attribute recognition model is used to identify underground space's air quality. Three types of method are applicated to empower the objective weights, which avoid determining the weights subjectively. In the light of actual description of the process, the ultimate evaluation of underground space's air quality is fit for the result of reality.
A two-level fuzzy tuning scheme is presented in this paper. The fuzzy tuner in the upper level is used to design the membership functions of the fuzzy logic controller in the lower level. The scheme provides an effective means for obtaining a good performance of the controller in a short time with a low computational burden. The upper and lower levels have a similar structure for the fuzzy inference,...
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