检索结果-内蒙古大学图书馆

Scale‐wise interaction fusion and knowledge distillation network for aerial scene recognition

CAAI Transactions on Intelligence Technology 2023年第4期8卷 1178-1190页

作者： Hailong Ning Tao Lei Mengyuan An Hao Sun Zhanxuan Hu Asoke K.Nandi School of Computer Science and Technology Xi'an University of Posts and TelecommunicationsShaanxi Key Laboratory of Network Data Analysis and Intelligent ProcessingXi'anChina Xi'an Key Laboratory of Big Data and Intelligent Computing Xi'anChina School of Electronic Information and Artificial Intelligence Shaanxi University of Science and TechnologyXi'anChina School of Computer Central China Normal UniversityWuhanChina Department of Electronic and Electrical Engineering Brunel University LondonLondonUK Xi'an Jiaotong University Xi'anChina

Aerial scene recognition(ASR)has attracted great attention due to its increasingly essential *** of the ASR methods adopt the multi‐scale architecture because both global and local features play great roles in ***,the existing multi‐scale methods neglect the effective interactions among different scales and various spatial locations when fusing global and local features,leading to a limited ability to deal with challenges of large‐scale variation and complex background in aerial scene *** addition,existing methods may suffer from poor generalisations due to millions of to‐belearnt parameters and inconsistent predictions between global and local *** tackle these problems,this study proposes a scale‐wise interaction fusion and knowledge distillation(SIF‐KD)network for learning robust and discriminative features with scaleinvariance and background‐independent *** main highlights of this study include two *** the one hand,a global‐local features collaborative learning scheme is devised for extracting scale‐invariance features so as to tackle the large‐scale variation problem in aerial scene ***,a plug‐and‐play multi‐scale context attention fusion module is proposed for collaboratively fusing the context information between global and local *** the other hand,a scale‐wise knowledge distillation scheme is proposed to produce more consistent predictions by distilling the predictive distribution between different scales during *** experimental results show the proposed SIF‐KD network achieves the best overall accuracy with 99.68%,98.74%and 95.47%on the UCM,AID and NWPU‐RESISC45 datasets,respectively,compared with state of the arts.

关键词： deep learning image analysis image classification information fusion

来源：评论

学校读者我要写书评

暂无评论

Effective uncertain fault diagnosis technique for wind conversion systems using improved ensemble learning algorithm

引用

Energy Reports 2023年 10卷 3113-3124页

作者： Attouri, Khadija Dhibi, Khaled Mansouri, Majdi Hajji, Mansour Bouzrara, Kais Nounou, Mohamed Higher Institute of Applied Sciences and Technology of Kasserine Kairouan University Kasserine1200 Tunisia Electrical and Computer Engineering Program Texas A&M University at Qatar Qatar Chemical Engineering Program Texas A&M University at Qatar Qatar Laboratory of Automatic Signal and Image Processing National Engineering School of Monastir University of Monastir 5019 Tunisia

This paper introduces a pioneering fault diagnosis technique termed Interval Ensemble Learning based on Sine Cosine Optimization Algorithm (IEL- SCOA), tailored to tackle uncertainties prevalent in wind energy conversion (WEC) systems. The approach unfolds in three integral phases. Firstly, the establishment of interval centers and ranges, employing upper and lower bounds, effectively manages the inherent uncertainties arising from noise and measurement errors intrinsic to the wind system. Subsequently, the dataset undergoes processing via the Sine-Cosine Optimization Algorithm (SCOA), enabling the extraction of the most pertinent attributes. The culmination of predictive precision and classification performance is achieved through the integration of the refined dataset into an ensemble learning paradigm, harmonizing bagging, boosting techniques, and an artificial neural network classifier. The principal aim of the IEL-SCOA approach is to discern the spectrum of operational conditions within WEC systems, encompassing a healthy mode alongside six distinct faulty modes. These anomalies, encompassing short circuits, open circuits, and wear-out incidents, are deliberately induced at diverse locations and facets of the system, notably the generator and grid sides. Empirical results underscore the robustness and efficiency of the proposed methodology, showcasing an exceptional accuracy rate of 99.76 %. These outcomes definitively establish the IEL-SCOA approach as a potent and efficacious tool for precise fault diagnosis in uncertain WEC systems. © 2023

关键词： Fault detection

来源：评论

学校读者我要写书评

暂无评论

Virtual Frame Aggregation: Clustered Channel Access in Wireless Networks

Virtual Frame Aggregation: Clustered Channel Access in Wirel...

引用

IEEE International Conference on Communications

作者： Xuan Dong Shaohe Lv Chunsheng Zhu Rukhsana Ruby Xiaodong Wang Xingming Zhou Victor C. M. Leung National Laboratory of Parallel and Distributed Processing National University of Defense Technology Department of Electrical and Computer Engineering The University of British Columbia

ISBN: (纸本)9781467364300

Coordination among users is inevitable in wireless communication for efficient medium access. Even though the data rate of individual user increases significantly, the performance of wireless network does not grow up accordingly due to the high MAC coordination overhead. In this paper, we present VFA, namely virtual frame aggregation, to achieve high coordination efficiency by amortizing the overhead over multiple transmissions. VFA provides a novel way to construct a winner cluster and allow the winners to transmit without interruption. Specifically, in a multicarrier network, every contending node chooses a subcarrier and the nodes are ordered by the index of the chosen subcarrier. When there are some subcarriers chosen by two or more nodes, an additional slot is exploited to reorder the collided nodes. Finally, all ordered nodes form a cluster and the transmissions are issued sequentially and uninterruptedly. Simulation results show that usually two slots are enough to construct a sufficiently large winner cluster. Moreover, VFA achieves a notable throughput gain over IEEE 802.11 as high as 120% with better fairness under various scenarios.

关键词： Wireless communication Antennas Wires

来源：评论

学校读者我要写书评

暂无评论

Multi-View Graph Embedding Learning for Image Co-Segmentation and Co-Localization

引用

IEEE Transactions on Circuits and Systems for Video Technology 2024年第6期34卷 4942-4956页

作者： Huang, Aiping Li, Lijian Zhang, Le Niu, Yuzhen Zhao, Tiesong Lin, Chia-Wen Fuzhou University Fujian Key Laboratory for Intelligent Processing and Wireless Transmission of Media Information College of Physics and Information Engineering Fuzhou350108 China Fuzhou University Fujian Key Laboratory of Network Computing and Intelligent Information Processing College of Computer and Data Science Fuzhou350108 China University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu611731 China Fuzhou University Fujian Key Laboratory for Intelligent Processing and Wireless Transmission of Media Information College of Physics and Information Engineering The Fujian Science and Technology Innovation Laboratory for Optoelectronic Information Fuzhou350108 China Institute of Communications Engineering National Tsing Hua University Department of Electrical Engineering Hsinchu30013 Taiwan

Image co-segmentation and co-localization exploit inter-image information to identify and extract foreground objects with a batch mode. However, they remain challenging when confronted with large object variations or complex backgrounds. This paper proposes a multi-view graph embedding (MV-Gem) learning scheme which integrates diversity, robustness and discernibility of object features to alleviate this phenomenon. To encourage the diversity, the deep co-information containing both low-layer general representations and high-layer semantic information is generated to form a multi-view feature pool for comprehensive co-object description. To enhance the robustness, a multi-view adaptive weighted learning is formulated to fuse the deep co-information for feature complementation. To ensure the discernibility, the graph embedding and sparse constraint are embedded into the fusion formulation for feature selection. The former aims to inherit important structures from multiple views, and the latter further selects important features to restrain irrelevant backgrounds. With these techniques, MV-Gem gradually recovers all co-objects through optimization iterations. Extensive experimental results on real-world datasets demonstrate that MV-Gem is capable of locating and delineating co-objects in an image group. © 1991-2012 IEEE.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

An adaptive fast bitrate shaping scheme for H.264/AVC rate control

An adaptive fast bitrate shaping scheme for H.264/AVC rate c...

引用

IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB)

作者： Parisa Sha'afi Kabiri Mahmoud Reza Hashemi Multimedia Processing Laboratory of the School of Electrical and Computer Engineering University of Tehran Iran

Due to the shared nature of IP networks, the available network bandwidth is not constant and varies during transmission. In order to have better quality, efficient bandwidth utilization and network congestion management, the outgoing bitrate of a streaming application should adapt to changes in network traffic as fast as possible. The adaption time is very critical and plays an important role in the quality of the received video. More adaption time means that more packets are dropped in the network, which causes a lower video quality, and also causes congestion to persist for a longer period of time. In this paper, an adaptive bitrate shaping algorithm for the H.264/AVC encoder is presented. Network simulation results confirm that the proposed method works better than the existing shaping scheme of the JM12.2, which will be referred to as conventional method hereafter. The proposed method is able to adjust bitrate changes in less than 15 frames, compared to more than 20 frames that is required by the conventional method to reach the target bitrate. Moreover, the proposed method has no quality degradation or packet loss in the network simulations for all test sequences. The quality performance of the proposed method, in term of PSNR, is 4.635 dB higher than the conventional method in average for all test sequences. This enhancement in performance has been achieved with minimal computational complexity. It should be noted that the proposed method is applicable to any rate control method.

关键词： Bit rate Streaming media PSNR Bandwidth Cities and towns Software Simulation

来源：评论

学校读者我要写书评

暂无评论

H.264 Copyright Protection with Motion Vector Watermarking

H.264 Copyright Protection with Motion Vector Watermarking

引用

2008 International Conference on Audio，Language and Image processing(2008国际声音、语言、图像过程大会)

作者： Najla Mohaghegh Omid Fatemi Multimedia Processing Laboratory School of Electrical and Computer Engineering University of Tehran Tehran

Recently, digital watermarking has been one of the most appealing domains in copyright protection because of its residence in the content and negligible visual effects. In this paper, a video watermarking scheme is proposed which embeds copyright information in H.264 bitstream motion vectors. In the proposed method, a watermark string is embedded into the motion vector components with the larger size considering the video movement direction which will be retrieved in decoder. The main contribution is to adjust an adaptive threshold in such a way that with a defined number of embedded bits, i.e. the watermark payload, the video quality degradation will be negligible.

关键词： Watermarking Video sequences Signal to noise ratio Streaming media Payloads Visualization Decoding

来源：评论

学校读者我要写书评

暂无评论

A novel arbitration scheme for bandwidth and jitter guarantees in asynchronous NoCs

A novel arbitration scheme for bandwidth and jitter guarante...

引用

International CSI computer Conference, CSICC

作者： Marzieh Lenjani Mahmoud Reza Hashemi Multimedia Processing Laboratory School of Electrical and Computer Engineering University of Tehran Iran

On-chip network interconnections or network-on-chip (NOC) is viewed as a possible solution to global wiring issues in highly integrated complex systems. In current NoCs and in order to promote system level integrity, there is a growing need to provide different traffic classes, each with a different quality-of-service guarantee. In synchronous NOCs guaranteed service is provided by reserving time slots. Asynchronous NOC implementation, on the other hand, eliminates the need for synchronization when crossing clock domains. In asynchronous NOCs there is no notation of time and arbitration. Any delay in arbitration or refusing requests in arbitration results in the accumulation of data in switch buffers. In this paper a novel arbitration scheme for clockless NoCs has been proposed that is able to service a connection without any halt or jitter in streaming. Consequently, links with a burst traffic pattern and guaranteed bandwidth requirement can be implemented without any large buffers. Simulation results indicate that the proposed method is able to reduce switch buffer size, and hence power consumption in any NoC platform that is providing guaranteed bandwidth requirements in applications with burst data characteristics. For instance, in an MPEG-2 decoder mapped to a 3×2 mesh with 8 guaranteed bandwidth channels in each port, the proposed arbitration scheme is able to reduce the buffer size by 25%. The improvement increases to %47 for a JPEG2000 encoder mapped to a 3×3 mesh.

关键词： Bandwidth Jitter Network-on-a-chip Switches Clocks System-on-a-chip Wiring Telecommunication traffic Quality of service Synchronization

来源：评论

学校读者我要写书评

暂无评论

Rate-distortion-complexity optimization for VLSI implementation of integer motion estimation in H.264/AVC encoder

Rate-distortion-complexity optimization for VLSI implementat...

引用

IEEE International Conference on Multimedia and Expo (ICME)

作者： Alireza Aminlou Zahra NajafiHaghi Majid Namaki-Shoushtari Mahmoud Reza Hashemi Multimedia Processing Laboratory School of Electrical and Computer Engineering University of Tehran Iran

In order to accommodate the wide range of applications and the corresponding platforms where the H.264/AVC standard is currently in place, one should be able to optimize the encoder's computational complexity with a careful selection of the coding configuration parameters. Motion estimation is the most time-consuming part of the encoder which constitutes up to 75% of the computational complexity. In this paper, the optimum selection of configuration parameters, including search range, reference frame, degree of down-sampling and number of truncation bits have been analyzed for the VLSI implementation of integer motion estimation in terms of distortion-complexity performance. Furthermore, the optimum parameter sets have been presented for different video sizes and different constraints on computational power.

关键词： Video sequences Motion estimation PSNR Strontium Encoding Complexity theory Bit rate

来源：评论

学校读者我要写书评

暂无评论

Modelling surgical cuts, retractions, and resections via extended finite element method

Modelling surgical cuts, retractions, and resections via ext...

引用

7th International Conference on Medical Image Computing and computer-Assisted Intervention, MICCAI 2004

作者： Vigneron, Lara M. Verly, Jacques G. Warfield, Simon K. Signal Processing Group Dept of Electrical Engineering and Computer Science University of Liège Belgium Computational Radiology Laboratory Surgical Planning Laboratory Brigham and Women’s Hospital Harvard Medical School Boston United States

ISBN: (纸本)3540229779

We introduce a new, efficient approach for modelling the deformation of organs following surgical cuts, retractions, and resections. It uses the extended finite element method (XFEM), recently developed in"fracture mechanics" for dealing with cracks in mechanical parts. XFEM eliminates the computationally-expensive remeshing that would be required if the standard finite element method (FEM) was used. We report on the successful application of the method to the simulation of 2D retraction. The method may have significant impact on surgical simulators and navigators. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Fracture mechanics

来源：评论

学校读者我要写书评

暂无评论

Automatic generation of fast BLAS3-GEMM: A portable compiler approach 17

Automatic generation of fast BLAS3-GEMM: A portable compiler...

引用

International Symposium on Code Generation and Optimization (CGO)

作者： Xing Su Xiangke Liao Jingling Xue College of Computer National Laboratory for Parallel and Distributed Processing Changsha China UNSW School of Computer Science and Engineering Sydney NSW Australia

ISBN: (纸本)9781509049318

GEMM is the main computational kernel in BLAS3. Its micro-kernel is either hand-crafted in assembly code or generated from C code by general-purpose compilers (guided by architecture-specific directives or auto-tuning). Therefore, either performance or portability suffers. We present a POrtable Compiler Approach, Poca, implemented in LLVM, to automatically generate and optimize this micro-kernel in an architecture-independent manner, without involving domain experts. The key insight is to leverage a wide range of architecture-specific abstractions already available in LLVM, by first generating a vectorized micro-kernel in the architecture-independent LLVM IR and then improving its performance by applying a series of domain-specific yet architecture-independent optimizations. The optimized micro-kernel drops easily in existing GEMM frameworks such as BLIS and OpenBLAS. Validation focuses on optimizing GEMM in double precision on two architectures. On Intel Sandybridge and AArch64 Cortex-A57, Poca's micro-kernels outperform expert-crafted assembly code by 2.35% and 7.54%, respectively, and both BLIS and OpenBLAS achieve competitive or better performance once their micro-kernels are replaced by Poca's.

关键词： Kernel Optimization computer architecture Linear algebra Libraries Programming Program processors

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：