Optimal service life analysis of shared bicycles under ‘three-year mandatory scrapping’ policy

Author(s):  
Biyu Liu ◽  
Yanzhen Chen ◽  
Haidong Yang ◽  
Baozhu Peng ◽  
Kai Luo
2020 ◽  
Vol 175 ◽  
pp. 13007
Author(s):  
Arthur Alukhanyan ◽  
Olga Panfilova

The article deals with the issues of renovation (renewal) of the agricultural machinery and tractor fleet by developing models for developing an optimal strategy for its technical re-equipment. The optimal service life of machines in operation is considered as the most important prerequisite for the scientific management of such an update. The main criterion for the optimal strategy is the effectiveness of replacing a particular machine with a new one. The relevance of solving this problem is determined by the urgent need to plan the pace of technical re-equipment of the MTF, taking into account the presence of various economic restrictions.


2015 ◽  
Vol 733 ◽  
pp. 485-488
Author(s):  
Yu Ying Li ◽  
Shu Bo Hou

This paper introduces the current situation and existing problems of coal water slurry gasification technology (CWS). Sinopec Qilu combines with the structural characteristics of gasifier burner, analyzes the phenomenon of the short service life of gasifier burner from various perspectives, and expounds reasons. The requirements of CWS gasification for the fuel burner are given, and the new idea used in jet-nozzle design is also given in this paper.


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