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Carbon emissions and carbon flow within a specific area have been studied extensively, but little is known about the effects of inter-regional material and energy exchanges on carbon emissions. In this study, we examined an urban agglomeration in Northeastern China. A carbon emission model was established based on input-output analysis, and robustness analysis was used to test the system's stability. A new factor for indirect emission dominance intensity was developed to distinguish the significances of indirect emissions and direct emissions. Sectoral control and dependence relationships were explored by ecological network analysis. Results showed that carbon emissions from primary energy consumption were 2.34 times higher than those from secondary energy consumption. The indirect carbon emissions were more than double the direct emissions. The largest direct and indirect carbon emissions come from the advanced manufacturing sector, and the materials and energy conversion sector, respectively. In urban agglomeration, the exploitation relationship between sectors was dominant, suggesting that the structure of the system needs to be improved. Our results provide sector-specific information to help each sector to adjust industrial planning for emission reductions. [ABSTRACT FROM AUTHOR]

With the depth increasing and the improvement of mining mechanization of the coal mine, heat hazard is becoming more and more serious, the ice cooling system is gradually promoted and applied in China for recent years, but the cooling capacity and energy efficiency ratio (EER) test and analysis for such system is seldom reported. The cooling capacity and EER of the refrigerating equipment of an ice cooling system of a coal mine are tested and analyzed in Shandong Province in this paper. The test result indicates that the refrigerating capacity and EER are lower and both the pre-cooling units and the ice making system have a large variable range. It points out that it should not evaluate the ice cooling system by the test data only in this mine but expect more test data and analysis of the ice cooling system in other coal mines to get a more scientific conclusion. And the test, analysis and comparison for different kinds of cooling system are also expected to explore suitable cooling system while a full consideration of the geological conditions and other factors of the mine are taken into consideration. [ABSTRACT FROM AUTHOR]