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PASS: An adaptive multi-copy routing scheme for intermittently connected mobile Ad Hoc networks

Journal of Convergence information Technology 2012年第14期7卷 315-323页

作者： Xu, Jia Wang, Ru Chuan Sun, Li Juan College of Computer Nanjing University of Posts and Telecommunications Nanjing China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing China Key Laboratory for Computer Network and Information Integration Southeast University Ministry of Education Nanjing China State Key Lab. for Novel Software Technology Nanjing University Nanjing China

Intermittently Connected Mobile Ad Hoc networks (ICMANs) are mobile networks in which complete source-to-destination paths do not exist most of the time. This paper proposed a Predictable Adaptive Seed Spray routing (PASS) for intermittently connected mobile Ad Hoc networks. PASS is a cost-efficient delay-bounded routing protocol without network parameters and provides acceptable and resilient service in the face of challenged environments. Simulations have shown that PASS outperforms existing schemes such as Epidemic, binary spray & wait and AMR with respect to routing cost and adaptability.

关键词： Routing protocols

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Delay constraint adaptive routing based on seed spray in opportunistic networks

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Journal of Computational information Systems 2012年第12期8卷 5137-5148页

作者： Xu, Jia Wang, Ruchuan Sun, Lijuan College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technol. Min. of Edu. Jiangsu Prov. Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Laboratory for Computer Network and Information Integration Ministry of Education Southeast University Nanjing 211189 China State Key Lab. for Novel Software Technology Nanjing University Nanjing 210093 China

Opportunistic networks are sparse wireless networks which have no complete path from the source to the destination most of the time. Many applications require the support of delay constrained routing mechanism which can provide acceptable and resilient services in the challenged environments. We proposed Adaptive Seed Spray (ASS) to achieve the delay constraint with low cost in dynamic opportunistic networks. ASS will estimate the routing cost in source node, and use a small number of seed nodes to spray message copies in order to reduce redundant copies. Furthermore, ASS will make spray decisions in relay nodes which have the latest information of the networking conditions. Simulation results have shown that ASS has prominent superiority in routing cost and adaptability, and it is an efficient delay-bounded multi-copy routing protocol for opportunistic networks especially for dynamic conditions. © 2012 Binary information Press.

关键词： Cost benefit analysis

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Full rate and full diversity STBC in decode-and-forward relay systems

Full rate and full diversity STBC in decode-and-forward rela...

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2010 International Conference on Communications and Intelligence information Security, ICCIIS 2010

作者： Wang, Yong Li, Hui Ministry of Education Key Lab. of Computer Network and Information Security School of Telecommunications Engineering Xidian University Xi'an China

ISBN: (纸本)9780769542607

Diversity techniques are very effective tools to increase signal reception quality in Rayleigh fading channels. A novel space-time block coding method for cooperative relay networks is proposed which guarantees full diversity for any number of mobile relays with minimal delay, provided that few bits of feedback from the destination to the source and the relays are availab.e. As in the case of orthogonal space-time block codes, all transmitted symbols are separately decoded both in the relays and the destination. Therefore, decoding complexity is linear. In our proposed scheme, larger number of codes can be generated for improved coding gain. The performance of the proposed scheme is investigated for cooperative communication. It is shown that the new approach provides SNR improvement, and it is more resilient to feedback errors compared to the antenna selection technique on the basis of same number of feedback bits. © 2010 IEEE.

关键词： Cooperative communication

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Weakly supervised temporal action localization with proxy metric modeling

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Frontiers of computer Science 2023年第2期17卷 63-72页

作者： Hongsheng XU Zihan CHEN Yu ZHANG Xin GENG Siya MI Zhihong YANG NARI Group Corporation(State Grid Electric Power Research Institute) Nanjing 211106China School of Computer Science and Engineering and the Key Lab of Computer Network and Information Integration(Ministry of Education)Southeast UniversityNanjing 211189China School of Cyber Science and Engineering Southeast UniversityNanjing 211189China Purple Mountain Laboratories Nanjing 211111China

Temporal localization is crucial for action video *** the manual annotations are expensive and time-consuming in videos,temporal localization with weak video-level lab.ls is challenging but *** this paper,we propose a weakly-supervised temporal action localization approach in untrimmed *** settle this issue,we train the model based on the proxies of each action *** proxies are used to measure the distances between action segments and different original action *** use a proxy-based metric to cluster the same actions together and separate actions from *** with state-of-the-art methods,our method achieved competitive results on the THUMOS14 and ActivityNet1.2 datasets.

关键词： temporal action localization weakly supervised videos proxy metric

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Mamba-Sea: A Mamba-based Framework with Global-to-Local Sequence Augmentation for Generalizable Medical Image Segmentation

arXiv

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arXiv 2025年

作者： Cheng, Zihan Guo, Jintao Zhang, Jian Qi, Lei Zhou, Luping Shi, Yinghuan Gao, Yang Shanghai Jiao Tong University School of Medicine Shanghai200025 China National Institute of Healthcare Data Science Nanjing University Jiangsu Nanjing210093 China State Key Laboratory for Novel Software Technology the National Institute of Healthcare Data Science Nanjing University Jiangsu Nanjing210093 China School of Computer Science and Engineering Key Lab of Computer Network and Information Integration Southeast University Jiangsu Nanjing211189 China School of Electrical and Information Engineering The University of Sydney SydneyNSW2006 Australia

To segment medical images with distribution shifts, domain generalization (DG) has emerged as a promising setting to train models on source domains that can generalize to unseen target domains. Existing DG methods are mainly based on CNN or ViT architectures. Recently, advanced state space models, represented by Mamba, have shown promising results in various supervised medical image segmentation. The success of Mamba is primarily owing to its ability to capture long-range dependencies while keeping linear complexity with input sequence length, making it a promising alternative to CNNs and ViTs. Inspired by the success, in the paper, we explore the potential of the Mamba architecture to address distribution shifts in DG for medical image segmentation. Specifically, we propose a novel Mamba-based framework, Mamba-Sea, incorporating global-to-local sequence augmentation to improve the model’s generalizability under domain shift issues. Our Mamba-Sea introduces a global augmentation mechanism designed to simulate potential variations in appearance across different sites, aiming to suppress the model’s learning of domain-specific information. At the local level, we propose a sequence-wise augmentation along input sequences, which perturbs the style of tokens within random continuous sub-sequences by modeling and resampling style statistics associated with domain shifts. To our best knowledge, Mamba-Sea is the first work to explore the generalization of Mamba for medical image segmentation, providing an advanced and promising Mamba-based architecture with strong robustness to domain shifts. Remarkably, our proposed method is the first to surpass a Dice coefficient of 90% on the Prostate dataset, which exceeds previous SOTA of 88.61%. The code is availab.e at https://***/orange-czh/Mamba-Sea. Copyright © 2025, The Authors. All rights reserved.

关键词： Image segmentation

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On cross-correlation properties of Boolean functions

On cross-correlation properties of Boolean functions

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2009 4th International Conference on Communications and networking in China, CHINACOM 2009

作者： Zhou, Yu Xie, Min Xiao, Guozhen State Key Lab. Integrated Service Network Xidian University Shannxi Xi'an 710071 China Key Laboratory Computer Network and Information Security Xidian University Shannxi Xi'an 710071 China

ISBN: (纸本)9781424443376

To measure the correlation between two arbitrary Boolean functions, we propose the two new criteria called the sum-of-squares indicator and the absolute indicator of the cross-correlation. The two indicators generalize the GAC criterion (which was proposed by X.M. Zhang and Y.L. Zheng, in GAC-the criterion for global avalanche characteristics of cryptographic functions, Journal for Universal computer Science, 1(5): 316-333, 1995). Lower and upper bounds on the two indicators are obtained.

关键词： Boolean functions

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Robust evidence detection of copy-rotate-move forgery in image based on singular value decomposition

Robust evidence detection of copy-rotate-move forgery in ima...

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14th International Conference on information and Communications Security, ICICS 2012

作者： Yong, Liu Meishan, Huang Bogang, Lin College of Mathematics and Computer Science Fuzhou University Fuzhou 350108 China Key Lab. of Information Security of Network Systems Fuzhou 350108 China

ISBN: (纸本)9783642341281

Region Copy-Move forgery, in which a part of the image is copied and then pasted to another part of the same image. Some important goals and sensitive objects can be hidden imperceptibly;this forgery is at the rather important position in a variety of forensic technology research. But the literatures published merely are confined without geometric distortion. And some algorithms focus on the special forgery's model. In order to improve the accuracy of the current algorithms, a new detection is proposed by constructing the circles rather than the traditional ways which were based on the square. The seven characterizes are constructed according to singular value decomposition. Using main rotation angle based on the radial moment and the proportion of constraint remove the error mark. Finally the dictionary-ordering method is applied to save the time-consuming. The experiment shows that this newly characteristic can locate the area where was tampered. © 2012 Springer-Verlag.

关键词： Singular value decomposition

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Effects of image lossy compression on palmprint verification performance

Effects of image lossy compression on palmprint verification...

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2010 IEEE International Conference on information Theory and information Security, ICITIS 2010

作者： Li, Hengjian Wang, Jizhi Wang, Yinglong Zhang, Jiashu Shandong Provincial Key Laboratory of computer Network Shandong Computer Science Center Jinan China Sichuan Province Key Lab. of Signal and Information Processing Southwest Jiaotong University Chengdu China

ISBN: (纸本)9781424469406

In this paper, we investigate the effects that the lossy image compression has on the performance competitive codes of palmprint verification algorithms. Effects of lossy compression on palmprint recognition performance are of interest in applications where image storage space and transmission time are of critical importance. To reconcile that goal with its implications for bandwidth and storage, we test the effects of image lossy compression on competitive code under different transforms, quantization and encoding algorithms using a publicly availab.e palmprint database. Experiments performing recognition directly in the compressed domain show that the extracted feature template variation from the compressed palmprint image is not consistent with the image distortion. What is interesting, the effect on the JPEG is more serious than that of JPEG2000 when the compression ratio is bigger than about 11 while the effect on JPEG2000 is more serious than that of JPEG when the compression ratio is smaller than about 11. And the trellis coded quantized method is not suitable for compressing palmprint images. © 2010 IEEE.

关键词： Palmprint recognition

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An improved algorithm for Eleman Neural network by adding a modified error function

An improved algorithm for Eleman Neural Network by adding a ...

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4th International Symposium on Neural networks, ISNN 2007

作者： Zhang, Zhiqiang Tang, Zheng Tang, GuoFeng Vairappan, Catherine Wang, XuGang Xiong, RunQun Faculty of Engineering Toyama University Gofuku 3190 Toyama shi 930-8555 Japan Institute of Software Chinese Academy of Sciences Beijing 100080 China Key Lab. of Computer Network and Information Integration Southeast University Nanjing 210096 China

ISBN: (纸本)9783540723929

The Eleman Neural network has been widely used in various fields ranging from temporal version of the Exclusive-OR function to the discovery of syntactic categories in natural language date. However, one of the problems often associated with this type of network is the local minima problem which usually occurs in the process of the learning. To solve this problem, we have proposed an error function which can harmonize the update weights connected to the hidden layer and those connected to the output layer by adding one term to the conventional error function. It can avoid the local minima problem caused by this disharmony. We applied this method to the Boolean Series Prediction Questions problems to demonstrate its validity. The result shows that the proposed method can avoid the local minima problem and largely accelerate the speed of the convergence and get good results for the prediction tasks. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Neural networks

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Twice-Imaging airborne camera system with distributed sensors 21

Twice-Imaging airborne camera system with distributed sensor...

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21st Congress of the International Society for Photogrammetry and Remote Sensing, ISPRS 2008

作者： Zhao, S.H. Yan, L. Duan, X.H. Wu, Y.K. Shen, T.T. Su, M.D. Beijing Key Lab. of Spatial Information Integration and its Application Peking University Beijing100871 China School of Electronics Engineering and Computer Science Peking University Beijing China

Digital airborne cameras play a significant role for aerial Photogrammetry development from analog to full-digital age. Because of the gap between digital sensor performance and Photogrammetry request, digital airborne also becomes the bottleneck of full-digital approach. In this paper, we present a design of twice-imaging airborne camera system with distributed sensors based on film camera, and carry out optical experiments to obtain practical images, MTF (Modulation Transfer Function) and the scattering light traced by ZEMAX software. © 2008 International Society for Photogrammetry and Remote Sensing. All rights reserved.

关键词： Photogrammetry

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