| 1. |
- Hu, Yuping, et al.
(författare)
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LM-SVM-DT Based Working State Recognition for Washing Machine's Audio Signal
- 2022
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Ingår i: 2022 IEEE International Conference on Artificial Intelligence and Computer Applications, ICAICA 2022. - : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 550-554
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Konferensbidrag (refereegranskat)abstract
- In order to make a reasonable and effective judgment on the quality inspection and fault diagnosis of intelligent electrical appliances, this paper proposes a method of working state recognition for washing machine based on audio signal, named as LM-SVM-DT. The whole working process of the washing machine is divided into four basic states: water intake, soaking, washing and dehydration. The Log-mel features of the audio signal after bandpass filtering are extracted and modeled by the decision tree classification method based on SVM. That is, soaking and non-soaking states are separated at first, then washing and non-washing states are separated in non-soaking states, and finally water intake and dehydration states are separated in non-washing states. Taking the standard-washing-mode of a certain type of washing machine as an example to verify the algorithm, the experimental results show that the state recognition rate is as high as 0.9920. The results show that the model proposed in this paper is effective and feasible.
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| 2. |
- Liu, Junwei, et al.
(författare)
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Polymer synergy for efficient hole transport in solar cells and photodetectors
- 2023
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Ingår i: Energy & Environmental Science. - : ROYAL SOC CHEMISTRY. - 1754-5692 .- 1754-5706.
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Tidskriftsartikel (refereegranskat)abstract
- Hole transport materials (HTMs) have greatly advanced the progress of solution-based electronic devices in the past few years. Nevertheless, most devices employing dopant-free organic HTMs can only deliver inferior performance. In this work, we introduced a novel "polymer synergy" strategy to develop versatile dopant-free polymer HTMs for quantum dot/perovskite solar cells and photodetectors. With this synergy strategy, the optical, electrical and aggregation properties of polymer HTMs can be modulated, resulting in complementary absorption, high hole mobility, favorable energy landscape and moderate aggregation. Moreover, a clear orientational transition was observed for the developed HTMs with a 9-fold increase in the face-on/edge-on ratio, providing a highway-like carrier transport for electronic devices, as revealed by in situ characterization and ultrafast transient absorption. With these benefits, the photovoltaic and photodetection performance of quantum dot devices were boosted from 11.8% to 13.5% and from 2.95 x 10(12) to 3.41 x 10(13) Jones (over a 10-fold increase), respectively. Furthermore, the developed polymer HTMs can also significantly enhance the photovoltaic and photodetection performance of perovskite devices from 15.1% to 22.7% and from 2.7 x 10(12) to 2.17 x 10(13)Jones with the same device structure, indicating their great application potential in the emerging optoelectronics.
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