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In a mature manufacturing system, the occurrence of operating fault conditions is few and far between. Majority of the data collected from such systems typically exhibits normal operating behaviours. This phenomenon inadvertently creates an imbalance between the class distributions of the data. The imbalance ratio may fall in the range of 1:100 to 1:1000(More)
This paper presents on-line tool breakage detection of small diameter drills by monitoring the AC servo motor current. The continuous wavelet transform was used to decompose the spindle AC servo motor current signal and the discrete wavelet transform was used to decompose the feed AC servo motor current signal in time–frequency domain. The tool breakage(More)
To investigate the role of p38 MAPK in silicosis, we explored the effects of SB203580 as a specific inhibitor of p38 MAPK in the silicosis model in rats. Rats were exposed to 50mg/ml silica intratracheally. From the first day after instillation, rats were injected with SB203580 1mg/kg/d. Rats were sacrificed at 7 and 15days after exposure of silica. The(More)
Bioassay-directed fractionation of the stem bark extract of Erythrina variegata L. has resulted in the isolation of three new isoflavones: 5,4'-dihydroxy-8-(3,3-dimethylallyl)-2''-methoxyisopropylfurano[4,5:6,7]isoflavone (1), 5,7,4'-trihydroxy-6-(3,3-dimethylallyloxiranylmethyl)isoflavone (2),(More)
This article describes a decision support system for land-use structure optimization and land-use allocation. This system was established for the rural land managers to explore their land use options. It integrated database technology, expert system technology and spatial decision support system technology. The DSS consist of four components: a geographic(More)
Pituitary adenomas usually develop temozolomide resistance, which could compromise the anticancer effects of temozolomide. Suppression of hypoxia-inducible factor 1α has been shown to sensitize glioblastoma cells to temozolomide treatment according to previous reports. However, whether and how the suppression of hypoxia-inducible factor 1α could sensitize(More)
Along with expansion of the network scale, much more attention has been paid to the information transmission among nodes in network and the resulted control problem. Therefore, the index of structural controllability is introduced in this paper to characterize the performance indices when network system can be controlled within finite time. Furthermore, an(More)
106 Abstract—Dynamic textures are sequences of images of moving scenes that exhibit certain stationary properties in time; these include sea-waves, smoke, foliage, whirlwind etc. In previous works [1,2], dynamic textures are usually modeled as linear models, and parameters of the model are identified in the sense of maximum likelihood or minimum prediction(More)
In the reference of ISO/IEC 9126 software quality model, this article establishes a comprehensive evaluation system of the software dependability. At the same time, it uses the concept of entropy to combine subjective weights and the entropy of objective weights to determine the weight values of measurements in the evaluation system. On this basis, take(More)