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The leading industry index system is the important basis for the choice of resources city industry. However, in the build process of index system, numerous indicators are interrelated and overlapping. Therefore this paper uses principal component analysis to transform the statistical indicators of the overlapped industry choice into a few of mutual independent aggregative indicator, to achieve the...
Communication System GIS is an important foundation of digital city construction and the basis of GIS construction is the choice of network platform. In this paper, based on past research and reality, it builds a software selection index system which includes three aspects-economy, universality and technicality. It conducts the evaluation of typical domestic and foreign software and analyzes its rationality...
Bio-hydrogen production of starch wastewater by anaerobic fermentation technology was studied in this paper. The results show that the best conditions of continuous hydrogen production are: the HRT is 8 hours and the temperature of the reactor is 35°C, in which conditions, the hydrogen production rate is up to 195.6 ml/g-starch. At the same time, the starch wastewater is degraded with COD removal...
Staffs' perceived work pressure has complex influence on their performance. Empirical study indicates that work pressure can increase staffs' emotional labor and job burnout significantly, lead to emotional burnout and then affect performance negatively. So managers in service industry should pay attention to pressure management, adopt humanity methods to reduce staffs' emotional labor and job burnout...
In grey network planning, the parameters of duration are expressed as interval grey numbers. When the time parameters were calculated according to grey number operational laws, grey degree of the results is expanded unnecessarily and sometimes the lower bounds are negative. So, the time parameters of grey network planning lost the original meaning. The present paper studies on the time parameters...
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