检索结果-内蒙古大学图书馆

Predominant types of regional cold waves in North China and their historical changes

Atmospheric and Oceanic science Letters 2024年第4期17卷 46-51页

作者： Xinyi Cheng Yiyi Zhang Jiandong Li Xin Hao Center for Climate System Prediction Research/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of EducationNanjing University of Information Science&TechnologyNanjingChina Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjingChina

寒潮事件对东亚地区的社会经济,生态系统和人体健康影响巨大.根据1980-2019年间10月至次年3月的每日寒潮记录和K-means聚类,本文识别出了中国两种不同类型的区域性寒潮(T1和T2). T1区域性寒潮主要影响东北地区,T2区域性寒潮则主要影响... 详细信息

寒潮事件对东亚地区的社会经济,生态系统和人体健康影响巨大.根据1980-2019年间10月至次年3月的每日寒潮记录和K-means聚类,本文识别出了中国两种不同类型的区域性寒潮(T1和T2). T1区域性寒潮主要影响东北地区,T2区域性寒潮则主要影响华北和东部地区.与T1区域性寒潮相比, T2区域性寒潮强度更强,持续时间更长,影响范围更广. 1980–2019年期间, T1区域性寒潮的频率显著增加,而T2区域性寒潮的频率则没有趋势变化. T1和T2区域性寒潮事件均与西伯利亚高压增强有关,然而与它们相关的对流层中层波列明显不同.在T1区域性寒潮事件发生期间,西伯利亚-蒙古上空出现负-正模态的500-hPa位势高度异常波列,削弱了东亚大槽,导致西伯利亚冷空气东移.T1区域寒潮频次增加趋势可能与全球变暖引起的500-hPa位势高度的线性趋势变化有关.与T2区域寒潮事件相关的波列则在乌拉尔山脉,蒙古和华北地区形成了脊-槽-脊环流异常,导致冷空气向东南方向入侵.本文得出结论,由于两类区域寒潮影响不同,西伯利亚高压增强和对流层中层波列模态在我国区域性寒潮事件的预报中应综合考虑.

关键词：寒潮 K-means聚类西伯利亚高压波列

来源：评论

学校读者我要写书评

暂无评论

Decomposing Visual and Semantic Correlations for Both Fully Supervised and Few-Shot Image Classification

IEEE Transactions on Artificial Intelligence

引用

IEEE Transactions on Artificial Intelligence 2024年第4期5卷 1658-1668页

作者： Zhang, Chunjie Zheng, Xiaolong Beijing Jiaotong University Institute of Information Science Beijing100044 China Beijing Jiaotong University Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing100044 China University of Chinese Academy of Sciences State Key Laboratory of Multimodal Artificial Intelligence Systems The State of Key Laboratory of Management and Control for Complex System Institute of Automation Chinese Academy of Sciences School of Artificial Intelligence Beijing100190 China

Most image classification methods are designed to either boost the classification accuracies with abundant supervision, or cope with the shortage of supervision information. This is often achieved by using the visual and semantic information of other sources. However, these methods use the visual and semantic information within the same class independently, leaving their intrinsic correlations unconsidered. Objects and disturbing components as well as noise exist on the same image. Besides, semantic representations also contain noisy information. To solve the problems mentioned above, we propose a novel method for both fully supervised image classification and few-shot image classification by decomposing visual and semantic correlations. We jointly explore the intrinsic correlations of visual and semantic information of images within the same class. For each class, we decompose its visual and semantic correlations using low-rank and sparse constraint respectively. The decomposed low-rank parts character the intrinsic correlations of images can be used in a linear transformation way. Using the decomposed parts of each class, Classification can be achieved by reconstruction error minimization. We conduct experiments on several datasets for both fully supervised image classification and few-shot image classification. Experimental results well show the effectiveness of the proposed method. © 2020 IEEE.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

ARCHITECTURE DESIGN AND VERIFICATION OF INERT GAS DISTRIBUTION system

ARCHITECTURE DESIGN AND VERIFICATION OF INERT GAS DISTRIBUTI...

引用

2024 CSAA/IET International Conference on Aircraft Utility systems, AUS 2024

作者： Wang, Yangyang Wang, Chenchen Fuel System Department Nanjing Engineering Institute of Aircraft Systems AVIC Nanjing China The Aviation Electromechanical System Integration of Aviation Science and Technology Key Laboratory Nanjing China

This study addresses the requirements for tank inerting and proposes application-oriented architectures for inert gas distribution system. Utilizing AMEsim, a multi-tank simulation model is constructed. The accuracy of the model was validated through experimental data,demonstrating its applicability for engineering calculations. Furthermore,the model was utilized to analyze both series and parallel schemes of the distribution system. Results suggest that the series scheme effectively reduces tank oxygen concentration, enhances system reliability and oxygen concentration uniformity, and achieves higher inert gas utilization rates with simplified pipeline arrangements. Consequently, we recommend adopting the series scheme for inert gas distribution system. These findings provide a basis for designing and optimizing inerting system. © The Institution of engineering & technology 2024.

关键词： Tanks (containers)

来源：评论

学校读者我要写书评

暂无评论

Steel Surface Defect Detection Based on Improved YOLOv8 20

Steel Surface Defect Detection Based on Improved YOLOv8

引用

20th International Conference on Natural Computation, Fuzzy systems and Knowledge Discovery, ICNC-FSKD 2024

作者： Zhang, Jichen Zhang, Zhi College of Computer Science and Technology Wuhan University of Science and Technology Hubei Wuhan430065 China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System Hubei Wuhan430065 China Big Data Science and Engineering Research Institute Wuhan University of Science and Technology Hubei Wuhan430065 China

ISBN: (纸本)9798350356328

There are some defects on the surface of steel that are difficult to detect, so we propose an improved algorithm based on YOLOv8 for detecting defects that are difficult to be detected. This improvement includes the introduction of an SPD module to minimize the problem of information loss due to downsampling;the addition of a small object detection head combined with EMA attention to further enhance the detection capabilities for small targets;the use of BiFPN to replace the original PANet, applying different weights to different features to strengthen feature fusion. Experiments were conducted on the NEU-DET dataset, and the algorithm improved mAP to 80.2%, an improvement of 3.9% over the baseline model. © 2024 IEEE.

关键词： Change detection

来源：评论

学校读者我要写书评

暂无评论

A Novel Capsule Robot Drive Module with Translational Motion Functions 20

A Novel Capsule Robot Drive Module with Translational Motion...

引用

20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： Yao, Long Guo, Shuxiang The Key Laboratory of Convergence Biomedical Engineering System and Healthcare Technology The Ministry of Industry and Information Technology Beijing Institute of Technology Beijing100081 China Southern University of Science and Technology The Department of Electronic and Electrical Engineering Guangdong Shenzhen518055 China

ISBN: (纸本)9798350320831

Wireless endoscopic robots, which are often used in gastrointestinal diseases, are difficult to integrate multiple functions simultaneously due to their limited size. Based on the functional modular working concept of capsule robots previously proposed. The drive module supports and navigates the functional modules for specific diagnosis or treatment, and the two can form new structures through docking mechanisms. The drive module developed so far has a simple structure and can realize basic transportation work, but the motion state is only a single axial rotation. In this study, we will introduce a magnetic drive module of a gastrointestinal capsule robot with forward translation movement ability, which can ensure horizontal forward movement under the condition of maintaining stability at one end, and the rotation surface of the external control magnetic field is replaced from a plane perpendicular to the direction of motion to a plane parallel to it, which is conducive to the utilization of the rotation degrees of freedom of the vertical plane by the functional module that matches it. Experiments show that the drive module can advance stably within the error range. © 2023 IEEE.

关键词： Magnetic fields

来源：评论

学校读者我要写书评

暂无评论

Enhancing the high-temperature corrosion resistance of HVOF-sprayed NiCoCrAlY coating in marine environment by Pt modification and pre-oxidation

引用

Journal of Materials science & technology 2024年第34期201卷 222-235页

作者： Y.Y.Li Y.M.Jiang C.Zhang H.Z.Ji S.Li N.Xu Z.B.Bao S.L.Zhu F.H.Wang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China National Engineering Research Center of Special Equipment and Power System for Ship and Marine Engineering No.703 Research Institute of CSSCHarbin 150078China Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819China

To prolong the service lifetime of hot-section components used in marine environment at elevated tem-peratures,it is crucial to explore and develop high-temperature corrosion-resistant ***-velocity oxygen fuel(HVOF)sprayed NiCoCrAlY,Pt-modified NiCoCrAlY and pre-oxidized Pt-modified NiCoCrAlY coatings were prepared and *** study is concerned with the performance of three coat-ings in a simulated marine environment based on the phase composition of corrosion products and mi-crostructure evolution of coating samples combined with first-principles density functional *** results show that the NiCoCrAlY coating was subject to accelerated corrosion and extensive aluminum depletion,leading to premature coating *** high-temperature corrosion resistance of Pt-modified NiCoCrAlY coating was found to be better than that of NiCoCrAlY *** contrast,the pre-oxidized Pt-modified NiCoCrAlY coating offered long-lasting protection and exhibited the best corrosion resistance,which is attributed to the positive synergistic effect between Pt modification and pre-oxidation.

关键词： High-temperature corrosion HVOF-sprayed MCrAlY coating Pt modification Pre-oxidation marine environment

来源：评论

学校读者我要写书评

暂无评论

A Novel Steerable Catheter for Vascular Interventional Surgery 20

A Novel Steerable Catheter for Vascular Interventional Surge...

引用

20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： Yan, Yonggan Guo, Shuxiang Lyu, Chuqiao Zhao, Duohao Lin, Zhijun Beijing Institute of Technology Key Laboratory of Convergence Biomedical Engineering System and Healthcare Technology The Ministry of Industry and Information Technology Beijing100081 China Southern University of Science and Technology The Department of Electronic and Electrical Engineering Guangdong Shenzhen518055 China

ISBN: (纸本)9798350320831

To improve the operation success rate, the steerable catheter is theoretically significant and practically valuable to design. However, it is still difficult for most existing catheters to realize this function. In this paper, to steer the catheter head, a novel spring-based tendon-drive structure was proposed with a diameter of 1.5mm. To obtain precise tip poses, based on the local force analysis, it is demonstrated that the contact force at each point between the tendon and spring is equal. And under the premise of frictionless, the curvature at each point of the tendon is equal, which is only related to the tension of the tendon. Then the proposed structure is simplified to a cantilever beam only subjected to bending moment. And the deformation of the catheter tip with the control parameters is expressed. Finally, the experimental setup is established and the experimental results showed that the proposed spring-based tendon-driven catheter deflected in a circular. And the results justified the feasibility of the cantilever beam assumption and the correctness of the deformation formulas. The proposed tendon-driven catheter has the potential in improving the success rate of the vascular approach and operation safety. © 2023 IEEE.

关键词： Tendons

来源：评论

学校读者我要写书评

暂无评论

An Interference Cancellation technology of Almost Blank Subframe based on Hierarchical Parameter Estimation 24

An Interference Cancellation Technology of Almost Blank Subf...

引用

7th International Conference on Signal Processing and Machine Learning, SPML 2024

作者： Chen, Xiangzhu Ning, Zeqiang Chen, Ronghai Liu, Yan Xiong, Yuyang Ma, Wanzhi School of Information and Communication Engineering University of Electronic Science and Technology of China China National Key Laboratory of Wireless Communications University of Electronic Science and Technology of China China

ISBN: (纸本)9798400717192

Ultra-dense networking is one of the key technologies used in 5G communications. The method of almost blank subframes (ABS) based on interference cancellation can solve the problem of inter-cell interference while ensuring the efficiency of the base station. However, the conventional scheme is difficult to meet the demand for cancellation in the complex channel environment. Under such circumstances, in order to ensure the transmission quality of communication base station, jamming base stations have to set up a large number of ABS, which will greatly diminish their communication efficiency. Therefore, a new ABS scheme based on hierarchical parameter estimation is proposed in this paper. In this scheme, a hierarchical channel parameters estimation method is designed by only using three ABS, and then the obtained parameters are used to reconstruct the interference signal for interference cancellation at the terminal. According to the simulation results, the suggested method may improve conventional interference cancellation schemes by approximately 7dB in a complex channel environment. This ensuring the availability of interference cancellation ABS scheme in challenging conditions. © 2024 ACM.

关键词： Base stations

来源：评论

学校读者我要写书评

暂无评论

MvSR-NAT: Multi-view Subset Regularization for Non-Autoregressive Machine Translation

引用

IEEE/ACM Transactions on Audio Speech and Language Processing 2022年 1-10页

作者： Xie, Pan Li, Zexian Zhao, Zheng Liu, Jiaqi Hu, Xiaohui School of Automation Science and Electrical Engineering Beihang University Beijing China China Academy of Launch Vehicle Technology Beijing China Science and Technology on Integrated Information System Laboratory Institute of Software Chinese Academy of SciencesorgName Beijing China

Conditional masked language models (CMLM) have shown impressive progress in non-autoregressive machine translation (NAT). They learn the conditional translation model by predicting the random masked subset in the target sentence. Based on the CMLM framework, we introduce Multi-view Subset Regularization (MvSR), a novel regularization method to improve the performance of the NAT model. Specifically, MvSR consists of two parts: (1) shared mask consistency: we forward the same target with different mask strategies, and encourage the predictions of shared mask positions to be consistent with each other. (2) model consistency, we maintain an exponential moving average of the model weights, and enforce the predictions to be consistent between the average model and the online model. Without changing the CMLM-based architecture, our approach achieves remarkable performance on three public benchmarks with 0.7-1.15 BLEU gains over previous NAT models. And, we reduce the gap to the stronger Transformer baseline. IEEE

关键词： Machine translation

来源：评论

学校读者我要写书评

暂无评论

Evaluation of User Interface, User Experience, and Usability in Software Through Electroencephalography (EEG) Signal Detection: A Mapping Review

Evaluation of User Interface, User Experience, and Usability...

引用

2023 International Workshop on Artificial Intelligence and Image Processing, IWAIIP 2023

作者： Syahidi, Aulia Akhrian Kiyokawa, Kiyoshi Politeknik Negeri Banjarmasin Smart City Information System Department of Electrical Engineering Banjarmasin Indonesia Nara Institute of Science and Technology Division of Information Science Graduate School of Science and Technology Nara Ikoma Japan

ISBN: (纸本)9798350382914

As the digital landscape continues to evolve through the widespread use of software, understanding how users interact with software becomes increasingly important. This article presents the findings of a literature review that explores the use of Electroencephalography (EEG) signals to assess user interfaces, user experience, and/or software usability. We used the mapping review method in this research with the main stages including: 1) Establishing research questions;2) Source selection;3) Identifying keywords;4) Carrying out a screening process;and 5) Extracting and synthesizing data. As a result, we determined 16 relevant papers as primary sources. We highlight the distribution of papers from various databases and their suitability for the period January 2013 to May 2023. In addition, we find that traditional EEG devices, standard five frequency bands, 32 electrodes, signal classification techniques such as Linear Discriminant Analysis (LDA), Frequency Fourier Transform (FFT), and Power Spectrum Density (PSD), gaming software as research subjects, and user experience evaluation questionnaires are most widely used in research practice. The results of this literature review provide comprehensive insight into the latest developments in the use of EEG signals to evaluate software in terms of the field of Human-Computer Interaction, to reduce the factors of subjectivity, bias, efficiency, and accuracy of evaluation results. These insights can serve as a basis for further research and the development of more effective methods and tools for improving software quality. © 2023 IEEE.

关键词： User interfaces

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：