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Yuhai Yang, Xiaodong Liu and Wei Lu
This study is concerned with the imperfect virtual-reality mapping relationship in cyber?physical systems (CPSs) and the challenge faced in knowledge-based decisions. Regarding those problems, a double-layer mapping Petri net (DMPN) model is proposed. By...
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Wanrui Wang, Yapeng Chen, Weihua Wang, Yuhai Yang, Yifeng Hou, Shuai Zhang and Ziyang Zhu
Land use change greatly affects groundwater hydrochemical cycling and thereby food and ecosystem security in arid regions. Spatiotemporal distribution of groundwater hydrochemistry is vital to understand groundwater water-salt migration processes in the ...
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Xiaocong Wei, Hongfei Lin, Liang Yang and Yuhai Yu
Learners in a massive open online course often express feelings, exchange ideas and seek help by posting questions in discussion forums. Due to the very high learner-to-instructor ratios, it is unrealistic to expect instructors to adequately track the fo...
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