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35. Evaluating the efficiency of water development–utilisation–treatment system: a DEA-BPNN model.

Author

Yan, Shiyu, Yao, Liming, and Hu, Zhineng

Subjects
*WATER pollution, *DATA envelopment analysis, *WATER supply, *DECISION trees, *SUPPORT vector machines
Abstract

With rapid economic growth and urbanisation, water shortage and water pollution are becoming more and more serious. It is very important for decision makers to understand the efficiency of the water system and know its development trend. Data envelopment analysis (DEA) is a robust tool for assessing efficiency. However, the DEA model lacks predictive capabilities, and cannot give guidance on future development. In contrast, a back-propagation neural network (BPNN) offers powerful non-linear mapping and adaptive prediction capabilities. To compensate for the deficiencies of the DEA model, a three-stage DEA-BPNN model is developed based on environmental compatibility and economic development. This model enables specific efficiency measurements, identifies system weaknesses and anticipates future trends. Then, the proposed model is applied to a 'one belt and one road' region, comparing its predictive performance with that of linear regression, a generalised additive model, support vector machines, k-nearest neighbours, random forest and gradient boost decision trees. Results reveal that following determination by several prediction models, the BPNN model obtains the more accurate prediction results. [ABSTRACT FROM AUTHOR]

Published
2024
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43. Sustainable Water Allocation Under Multi-disciplinary Framework: Dealing with Uncertainties in Decision Making and Optimization

Author

Yao, Liming, Su, Zerui, Chen, Xudong, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Xu, Jiuping, editor, Duca, Gheorghe, editor, Ahmed, Syed Ejaz, editor, García Márquez, Fausto Pedro, editor, and Hajiyev, Asaf, editor

Published
2020
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44. Measuring the Operation Performance of Unattended Convenience Store Using a Two-stage SBM Method

Author

Shuai, Yuhong, Liu, Tingting, Chen, Xudong, Yao, Liming, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Xu, Jiuping, editor, Ahmed, Syed Ejaz, editor, Cooke, Fang Lee, editor, and Duca, Gheorghe, editor

Published
2020
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49. Advancements in Ti3C2TxMXene Stability: Synergistic Antioxidant Strategies and Their Impact on Long-Lasting Flexible Sensors

Author

Yao, Liming, Qian, Liwei, Song, Wenqi, Zhang, Sufeng, Zhang, Yuhao, Zhang, Lijing, Li, Xikuan, Yan, Guangqi, and Nica, Valentin

Abstract

Two-dimensional (2D) transition metal carbides (Ti3C2TxMXene) have demonstrated substantial application potential across various fields, owing to their excellent metallic conductivity and solution processability. However, the rapid oxidation of Ti3C2Txin aqueous environments, leading to a loss of stability within mere days, poses a significant obstacle for its practical applications. Herein, we introduce an antioxidant strategy that combines free radical scavenging with surface passivation, culminating in the design and synthesis of imidazolium-based ionic liquids (ILs) incorporating siloxane groups. By deploying a straightforward hydrolysis-addition reaction, we successfully fabricated IL-modified Ti3C2Txmaterials (Ti3C2Tx-IL). The Ti3C2Tx-IL not only displayed exceptional conductivity exceeding 3.85 × 104S/m and hydrophilic contact angles below 45° but also showcased its superior chemical stability and antioxidation mechanisms through various analyses, including visual color change experiments, spectroscopic and energy spectrum characterization, free radical scavenging tests, and density-functional-theory-based molecular simulations. Furthermore, when utilized as a conductive filler in the fabrication of a poly(vinyl alcohol)/nanocellulose fiber (PVA/CNF) composite hydrogel (PCMIL), the resultant sensors exhibited remarkable mechanical performance with up to 535% strain, 1.59 MPa strength, 4.35 MJ/m3toughness, and a conductivity of 3.40 mS/cm, as well as a high sensitivity gauge factor of 3.3. Importantly, even after 45 days of storage, the PCMIL retained most of its functionalities, demonstrating superior performance in human-machine interaction applications compared to hydrogels made from unmodified Ti3C2Tx. This research establishes a robust antioxidant protection strategy for Ti3C2Tx, offering substantial technical reinforcement for its prospective applications in the realm of flexible electronics and sensing technologies.

Published
2024
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