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1,390 results on '"Liu, Yanwei"'

157. A study of magnetic ultrathin films on GaAs and optically excited spin injection

Author

Liu, Yanwei

Subjects
621.38152
Abstract

Ferromagnetic metal - semiconductor Schottky diode structures are believed to be one of the most likely candidates to achieve an efficient spin injection at room temperature, which is one of the essential requirements for spintronic devices. rhe work presented has been performed with the aim of achieving a comprehensive understanding of the complicated spin-dependent transport processes taking place in the ferromagnetic metal-semiconductor Schottky diode structures.

Published
2005

158. Gem5Tune: A Parameter Auto-Tuning Framework for Gem5 Simulator to Reduce Errors

Author

Qiu, Yudi, Huang, Tao, Tang, Yuxin, Liu, Yanwei, Kong, Yang, Yu, Xulin, Zeng, Xiaoyang, and Fan, Yibo

Abstract

Computer architecture simulators are widely used to explore new architectures, e.g., the gem5 simulator. However, gem5 has significant performance errors that may lead to misleading research results. Researchers typically reduce errors with the target machine by manual calibration methods, which are time-consuming and require significant expertise. This paper presents gem5Tune, a parameter auto-tuning framework for the gem5 simulator to reduce errors. Applying black-box optimization (BBO) methods, recommended for TPE-based Bayesian optimization, gem5Tune minimizes the error between gem5 and the target machine within a limited number of iterations. Three optimization methods, instruction calibration, sensitivity analysis, and dynamic pruning, are proposed to accelerate the error convergence. Experimental results show that compared to the manual calibration method, gem5Tune significantly reduces performance errors between gem5 and three modern ARM servers by more than 10% (13.83%, 10.86%, and 25.22%, respectively) for SPEC CPU benchmarks. It also scales effectively to PARSEC and SPLASH-2x benchmarks and reduces the errors of architectural events.

Published
2024
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167. Human Action Recognition Based on Hierarchical Multi-Scale Adaptive Conv-Long Short-Term Memory Network.

Author

Huang, Qian, Xie, Weiliang, Li, Chang, Wang, Yanfang, and Liu, Yanwei

Subjects
HUMAN activity recognition, HUMAN-robot interaction
Abstract

Recently, human action recognition has gained widespread use in fields such as human–robot interaction, healthcare, and sports. With the popularity of wearable devices, we can easily access sensor data of human actions for human action recognition. However, extracting spatio-temporal motion patterns from sensor data and capturing fine-grained action processes remain a challenge. To address this problem, we proposed a novel hierarchical multi-scale adaptive Conv-LSTM network structure called HMA Conv-LSTM. The spatial information of sensor signals is extracted by hierarchical multi-scale convolution with finer-grained features, and the multi-channel features are fused by adaptive channel feature fusion to retain important information and improve the efficiency of the model. The dynamic channel-selection-LSTM based on the attention mechanism captures the temporal context information and long-term dependence of the sensor signals. Experimental results show that the proposed model achieves Macro F1-scores of 0.68, 0.91, 0.53, and 0.96 on four public datasets: Opportunity, PAMAP2, USC-HAD, and Skoda, respectively. Our model demonstrates competitive performance when compared to several state-of-the-art approaches. [ABSTRACT FROM AUTHOR]

Published
2023
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179. Van der Waals Multilayer Heterojunction for Low‐Voltage Organic RGB Area‐Emitting Transistor Array (Adv. Mater. 8/2023)

Author

Pan, Zhichao, primary, Liu, Kai, additional, Miao, Zhagen, additional, Guo, Ankang, additional, Wen, Wei, additional, Liu, Guocai, additional, Liu, Yanwei, additional, Shi, Wenkang, additional, Kuang, Junhua, additional, Bian, Yangshuang, additional, Qin, Mingcong, additional, Zhu, Mingliang, additional, Zhao, Zhiyuan, additional, Guo, Yunlong, additional, Dong, Huanli, additional, and Liu, Yunqi, additional

Published
2023
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181. “Trojan Horse” Type Internalization Increases the Bioavailability of Mercury Sulfide Nanoparticles and Methylation after Intracellular Dissolution

Author

Guo, Yingying, primary, Xiang, Yuping, additional, Liu, Guangliang, additional, Chen, Ying, additional, Liu, Yanwei, additional, Song, Maoyong, additional, Li, Yanbin, additional, Shi, Jianbo, additional, Hu, Ligang, additional, Yin, Yongguang, additional, Cai, Yong, additional, and Jiang, Guibin, additional

Published
2023
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194. Van der Waals Multilayer Heterojunction for Low‐Voltage Organic RGB Area‐Emitting Transistor Array

Author

Pan, Zhichao, primary, Liu, Kai, additional, Miao, Zhagen, additional, Guo, Ankang, additional, Wen, Wei, additional, Liu, Guocai, additional, Liu, Yanwei, additional, Shi, Wenkang, additional, Kuang, Junhua, additional, Bian, Yangshuang, additional, Qin, Mingcong, additional, Zhu, Mingliang, additional, Zhao, Zhiyuan, additional, Guo, Yunlong, additional, Dong, Huanli, additional, and Liu, Yunqi, additional

Published
2022
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197. CGCG clinical practice guidelines for the management of adult diffuse gliomas

Author

Jiang, Tao, Mao, Ying, Ma, Wenbin, Mao, Qing, You, Yongping, Yang, Xuejun, Jiang, Chuanlu, Kang, Chunsheng, Li, Xuejun, Chen, Ling, Qiu, Xiaoguang, Wang, Weimin, Li, Wenbin, Yao, Yu, Li, Shaowu, Li, Shouwei, Wu, Anhua, Sai, Ke, Bai, Hongmin, Li, Guilin, Chen, Baoshi, Yao, Kun, Wei, Xinting, Liu, Xianzhi, Zhang, Zhiwen, Dai, Yiwu, Lv, Shengqing, Wang, Liang, Lin, Zhixiong, Dong, Jun, Xu, Guozheng, Ma, Xiaodong, Cai, Jinquan, Zhang, Wei, Wang, Hongjun, Chen, Lingchao, Zhang, Chuanbao, Yang, Pei, Yan, Wei, Liu, Zhixiong, Hu, Huimin, Chen, Jing, Liu, Yuqing, Yang, Yuan, Wang, Zheng, Wang, Zhiliang, Wang, Yongzhi, You, Gan, Han, Lei, Bao, Zhaoshi, Liu, Yanwei, Wang, Yinyan, Fan, Xing, Liu, Shuai, Liu, Xing, Wang, Yu, and Wang, Qixue

Published
2016
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