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Cloud datacenters must ensure high availability for the hosted applications and failures can be the bane of datacenter operators. Understanding the what, when and why of failures can help tremendously to mitigate their occurrence and impact. Failures can, however, depend on numerous spatial and temporal factors spanning hardware, workloads, support facilities, and even the environment. One has to...
In this paper, the method of textual analysis is used to discuss main job stress sources of coal miners. On the basis of a textual analysis, work is done to preliminarily sort and identify items of job stress sources of coal miners, learn from existing studies to draw up a questionnaire of coal miners' job stress, and make a reliability and validity analysis. Research results show that coal miners'...
In micro-grids, due to their small scale, there is commonly only one power supplier. A competitive wholesale market hardly exists, so the question about how to consider market issues for small producers within micro-grids arises. On the other hand, the specific features of micro-grids where load and generated power hardly find a balance, require that customers take part to regulation issues, also...
In this research, a new method for discrimination of varieties of rice by means of near infrared spectroscopy (NIRS) was developed. First, the characteristic spectrums of rice were got through principal component analysis (PCA). The result of the analysis suggests that the reliabilities of first 4 principal components are more than 99.338%. The 2-dimontional plot was drawn with first and second principal...
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