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The rapid development of mobile technology has enabled learners to use mobile apps to assist their learning flexibly both in place and time. This paper reports a case study of mobile app assisted English learning in Chinese tertiary education, presents results of a questionnaire survey as well as answers of interviews, and discusses some key considerations in the development of mobile app assisted...
For the optimization of multi-component system preventive maintenance, the group maintenance strategy was adopted to model and optimize periodic replacement tasks. Based on the analysis of system maintenance cost structure and composition, the mathematical models were established for expected maintenance cost per unit time. And a genetic algorithm based approach was developed to search for the optimal...
This paper analyzes the techno-economic performance of 600 MW coal-fired power plant with and without ammonia-based CO2 capture process, based on the operating data of an existing power plant. The simulation and analysis, with fully consideration of features of existing coal-fired power plants and the integration of CO2 capture process with steam cycle, are made to reveal the thermal and environmental...
In the case of wind energy resources identified, wind farm micro-layout mainly involves the arrangement of the wind turbines including to define the number of the turbines and the space between them. In this paper, such impact factors on the wind farm micro-layout as topography, geomorphology, turbulence, wake and economic features of the wind farm are analyzed, and the model for optimization of the...
The concept of service enterprise productivity include efficiency, effectiveness and the resources which are input by corporation and customer. Knowing from the traditional conception, but it followed input-output model. The definition of service enterprise productivity is the precondition of analyzing its influencing factor. The research hold that we must understand service productivity concept by...
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