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388 results on '"He, Xiaoyang"'

1. Strain-modulated Valley Polarization and Piezomagnetic Effects in Altermagnetic Cr$_2$S$_2$

Author

Chen, Chen, He, Xiaoyang, Xiong, Qizhen, Quan, Chuye, Hou, Haojie, Ji, Shilei, Yang, Jianping, and Li, Xing'ao

Subjects
Condensed Matter - Materials Science
Abstract

Altermagnetism exhibits advantages over both ferromagnetic and antiferromagnetic counterparts by enabling spin splitting within antiferromagnetic materials. Currently, it is established that valley polarization in altermagnetism remains largely insensitive to spin-orbit coupling and spin. Here, using Cr$_2$S$_2$ as a case study, we investigate the mechanism through which an external field modulates valley polarization in altermagnetism. This effect arises from the external field's disruption of diagonal mirror symmetry $M_{xy}$, consequently inducing valley polarization within the material. Strain not only induces valley polarization but also generates an almost uniform magnetic field, which can reach as high as 118.39 T under 5% uniaxial strain. In addition, this symmetry breaking in Cr$_2$S$_2$ monolayers results in significant piezomagnetic properties, merging piezomagnetic and altermagnetic characteristics in two-dimensional materials.

Published
2024

2. Contextual Bandits with Non-Stationary Correlated Rewards for User Association in MmWave Vehicular Networks

Author

He, Xiaoyang, Huang, Xiaoxia, and Li, Lanhua

Subjects
Computer Science - Machine Learning
Abstract

Millimeter wave (mmWave) communication has emerged as a propelling technology in vehicular communication. Usually, an appropriate decision on user association requires timely channel information between vehicles and base stations (BSs), which is challenging given a fast-fading mmWave vehicular channel. In this paper, relying solely on learning transmission rate, we propose a low-complexity semi-distributed contextual correlated upper confidence bound (SD-CC-UCB) algorithm to establish an up-to-date user association without explicit measurement of channel state information (CSI). Under a contextual multi-arm bandits framework, SD-CC-UCB learns and predicts the transmission rate given the location and velocity of the vehicle, which can adequately capture the intricate channel condition for a prompt decision on user association. Further, SD-CC-UCB efficiently identifies the set of candidate BSs which probably support supreme transmission rate by leveraging the correlated distributions of transmission rates on different locations. To further refine the learning transmission rate over the link to candidate BSs, each vehicle deploys the Thompson Sampling algorithm by taking the interference among vehicles and handover overhead into consideration. Numerical results show that our proposed algorithm achieves the network throughput within 100%-103% of a benchmark algorithm which requires perfect instantaneous CSI, demonstrating the effectiveness of SD-CC-UCB in vehicular communications., Comment: 13 pages, 9 figures

Published
2024

27. Effect of Sequence of Pulmonary Artery and Vein Transection in Thoracoscopic Lobectomy on Efficacy and Safety of Patients with Non-small Cell Lung Cancer: A Systematic Evaluation

Author

BAI Xiangdou, HONG Ziqiang, CUI Baiqiang, YANG Ning, HE Xiaoyang, JIN Dacheng, and GOU Yunjiu

Subjects
non-small cell lung cancer, lobectomy, pulmonary artery, pulmonary vein, detachment sequence, comparison of curative effects, systematic review, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Objective To systematically evaluate the effect of sequence of pulmonary artery and vein transection in thoracoscopic lobectomy on the efficacy and safety of patients with non-small cell lung cancer. Methods PubMed, EMbase, Web of Science, The Cochrane Library, CNKI, Wanfang, VIP and CBM databases were searched for the researches on The post-operative efficacy of pulmonary arteriovenous and pulmonary vein resection sequence in thoracoscopic lobectomy for non-small cell lung cancer. The retrieval time is from the database construction to May 2022. Meta-analysis was performed using RevMan 5.4 software. Results Eight articles were included, including 3 randomized controlled studies and 5 cohort studies, with a total of 1810 patients. Meta-analysis results showed that: The operative time (MD=13.34, 95%CI(7.36, 19.32), P < 0.0001) and intraoperative blood loss (MD=45.29, 95%CI(40.24, 50.35), P < 0.0001) in the group with priority pulmonary vein resection were significantly higher than those in the group with priority pulmonary vein resection. The difference was statistically significant. However, the benefits of OS (HR=1.34, 95%CI (1.12, 1.60), P=0.001) and DFS (HR=1.44, 95%CI(1.18, 1.76), P=0.0003) in the group of priority pulmonary vein transection were significantly better than those in the group of priority pulmonary artery transection, with statistically significant differences. Conclusion Priority pulmonary vein transection during thoracoscopic lobectomy effectively improved patients' OS and DFS, resulting in higher survival benefit for patients with non-small cell lung cancer, but intraoperative bleeding and operation time are more than those with priority pulmonary artery transection.

Published
2023
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29. A Comparative Study of Several Mapping Algorithms Based on Laser SLAM

Author

Wang, Chuanxi, He, Xiaoyang, Ma, Hongjun, Shao, Li, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, S. Shmaliy, Yuriy, editor, and Abdelnaby Zekry, Abdelhalim, editor

Published
2022
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30. Epidemic Real-Time Monitor Based on Spark Streaming Real-Time Computing Algorithm

Author

Yang, Jiaxin, Sun, Yaqi, Lian, Xiaoman, He, Xiaoyang, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Liu, Qi, editor, Liu, Xiaodong, editor, Chen, Bo, editor, Zhang, Yiming, editor, and Peng, Jiansheng, editor

Published
2022
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33. Back to the Past: A Systematic Review of Immersive Narrative in Cultural Heritage Conservation.

Author

He, Xiaoyang, Wu, Dan, Li, Xin, and Tong, Xin

Subjects
*PRESERVATION of cultural property, *EVIDENCE gaps, *RESEARCH methodology, *PARTICIPANT observation, *META-analysis
Abstract

Immersive narrative creates a vivid experiential environment that allows users to be participants rather than mere observers, holding immense potential in the field of cultural heritage. However, current research primarily focuses on technological applications and integration, lacking in‐depth exploration of the fusion between technology and content as well as limited user engagement. Following a systematic review methodology, this study conducted searches and two rounds of screening in 7 major databases, resulting in the inclusion of 176 studies on immersive narrative in cultural heritage conservation. The study summarizes and extracts the current state, development trajectory, trends, research methods, and key elements in this field, innovatively categorizing them into 6 core levels of research patterns while proposing corresponding optimization strategies. Additionally, this study identifies research gaps and suggests future directions, aiming to facilitate the enhancement of immersive narrative development and deepen user engagement in the cultural heritage field. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Roles of copper(I) in water-promoted CO2 electrolysis to multi-carbon compounds.

Author

He, Xiaoyang, Lin, Li, Li, Xiangying, Zhu, Minzhi, Zhang, Qinghong, Xie, Shunji, Mei, Bingbao, Sun, Fanfei, Jiang, Zheng, Cheng, Jun, and Wang, Ye

Abstract

The membrane electrode assembly (MEA) is promising for practical applications of the electrocatalytic CO2 reduction reaction (CO2RR) to multi-carbon (C2+) compounds. Water management is crucial in the MEA electrolyser without catholyte, but few studies have clarified whether the co-feeding water in cathode can enhance C2+ formation. Here, we report our discovery of pivotal roles of a suitable nanocomposite electrocatalyst with abundant Cu2O−Cu0 interfaces in accomplishing water-promoting effect on C2+ formation, achieving a current density of 1.0 A cm−2 and a 19% single-pass C2+ yield at 80% C2+ Faradaic efficiency in MEA. The operando characterizations confirm the co-existence of Cu+ with Cu0 during CO2RR at ampere-level current densities. Our studies reveal that Cu+ works for water activation and aids C‒C coupling by enhancing formations of adsorbed CO and CHO species. This work offers a strategy to boost CO2RR to C2+ compounds in industrial-relevant MEA by combining water management and electrocatalyst design. Water plays a key role in electrocatalytic CO2 reduction, but the role of catalyst in water management is unknown. Here, the authors report the importance of catalyst in determining the function of water and demonstrate that the catalyst containing Cu+ promotes water activation and C2+ formation. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Design and Application Research of a UAV-Based Road Illuminance Measurement System.

Author

Xu, Songhai, Zou, Nianyu, He, Qipeng, He, Xiaoyang, Li, Kexian, Cheng, Min, and Liu, Kai

Subjects
MEASUREMENT errors, TRAFFIC safety, ROAD construction, LUMINOUS flux, CLOUD computing
Abstract

This paper presents a UAV-based road illumination measurement system and evaluates its performance through experiments. The system employs a HUBSAN Zino 2+ UAV, STM32F103RCT6 microcontroller, BH1750 illuminance sensor, and GPS and integrates flight, processing, measurement, cloud platform, obstacle avoidance, communication, and power supply units via the OneNET cloud platform. Both hardware and software designs were implemented, using the Z-score algorithm to handle outliers in illumination data. The system showed a single-point measurement error rate of 1.14% and a MAPE of 5.08% for multi-point measurements. In experiments, the system's horizontal and vertical illuminance RMSE were 1.92 lx and 1.75 lx, respectively. The real-time visualization interface improved operational efficiency, cutting labor costs by half and time costs by nearly four-fifths. UAV control and monitoring from the roadside ensured safety during measurements. The system's efficiency and wide measurement range enabled extended experiments, collecting illuminance data across multiple horizontal and vertical planes. This resulted in the creation of both horizontal and innovative vertical-plane illuminance distribution maps. These findings provide valuable data for evaluating road lighting quality, enhancing road traffic safety, and improving road illumination design. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Renewable Energy Accommodation Optimization Model Considering DC Tie Line Operation Conditions

Author

He, Xiaoyang, Zhou, Zhi, Zhan, Keming, Yao, Jinming, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Xue, Yusheng, editor, Zheng, Yuping, editor, and Bose, Anjan, editor

Published
2021
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