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Nonconvex -norm and Laplacian scale mixture with salient map for moving object detection

Multimedia Tools and Applications 2023年第9期83卷 26159-26182页

作者： Yang, Yongpeng Yang, Zhenzhen Le, Jun Li, Jianlin School of Network and Communication Nanjing Vocational College of Information Technology Nanjing China Key Laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China

Moving object detection which has attracted wide attention is the critical issue of computer vision. Consequently, the low-rank and sparse decomposition (LRSD) has been a powerful technology for extracting the moving object from videos which has achieved improvement for moving object detection. However, it still has some defaults such as the lower degree for approximating the low-rank and sparsity components, ignoring the spatial information of videos, being sensitive to noise, and so on. To address these problems mentioned above, we propose a new LRSD method which is named nonconvex norm and Laplacian scale mixture with salient map (NNLSMSM). It adopts the nonconvex $$\gamma $$ -norm and the Laplacian scale mixture (LSM) to approximate the low-rank and sparsity components of traditional LRSD model for enhancing the degree of approximating. Meanwhile, a salient map mechanism which can effectively capture the spatial information from videos is introduced to NNLSMSM. In addition, we extend our proposed NNLSMSM method to a robust NNLSMSM (RNNLSMSM) method for enhancing its robustness via introducing a noise item. It can effectively solve the problem of being sensitive to noise. In addition, we adopt the alternating direction method of multipliers (ADMM) to solve our proposed NNLSMSM and RNNLSMSM methods. At last, extensive experiments which are performed on various popular datasets by some state-of-the-art methods demonstrate the effectiveness and superiority of our proposed NNLSMSM and RNNLSMSM methods.

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A sliding fractal autoregressive integrated moving average model based on time compensation: SFARIMA

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Advances in Information Sciences and Service Sciences 2012年第19期4卷 11-17页

作者： Yin, An-sheng Zhang, Shun-yi Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education China Institute of Information and Network Technology Nanjing University of Posts and Telecommunication China

The traditional Poisson model in the modern data networks have been ineffective and cannot reflect the real flow trend. However, since Hosking discovers the network traffic self-similarity, self-similar models have continued to emerge, this article improved FARIMA model based on time compensation. We put forward a sliding FARIMA model which fixes the time delay of FARIMA model and analyzed the model's application in the anomaly detection of network.

关键词： Software engineering

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Cognitive networks multi-constraint QoS routing algorithm based on autonomic ant colony algorithm

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Journal of Computational Information Systems 2012年第8期8卷 3429-3436页

作者： Qi, Jin Zhang, Shunyi Sun, Yanfei Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China Institute of Information and Network Technology Nanjing University of Posts and Telecommunication Nanjing 210003 China

This paper focused on the study of cognitive networks (CNs) oriented multi-parameter constraint Quality of Service (QoS) routing optimization. With the foundation of CNs multi-parameter QoS routing requirement, referring to the shortcomings of basic ant colony algorithm, we brought improvements to the four aspects of pheromone initialization, pheromone evaporation factor adjustment, pheromone update method and state transition rules, proposed the CNs multi-constraint QoS routing algorithm based on autonomic ant colony (AAC) algorithm. The simulation result represents that the proposed algorithm has relatively good optimization ability and fast convergence speed, can effectively solving the multi-constraint QoS routing problem faced by CNs. © 2012 Binary Information Press.

关键词： Cost functions

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Cross-Scale Haptic Object Recognition for Intelligent Robot

Cross-Scale Haptic Object Recognition for Intelligent Robot

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International wireless communications and Mobile Computing Conference, IWCMC

作者： Ang Li Wei Lu Haoyu Wang Xin Wei Key Laboratory of Broadband Wireless Communication and Sensor Network Technology (Ministry of Education) Nanjing University of Posts and Telecommunications

Haptic technology enables robots to touch and understand the interactions between objects in the reality. Advanced haptic sensing systems can not only collect pressure, temperature and stiffness of touched objects, but also avoid destructive operations, and assist in navigation and posture control for robots. In order to smoothly interact with different types of objects, in the haptic system, it is necessary to develop haptic object recognition methods for effective haptic perception capability. However, compared to RGB images, haptic images collected by opticallybased haptic sensors are similar in appearance, which makes traditional convolutional neural networks (e.g.,ResNet, VGG, etc.) ineffective. Therefore, in this paper, we are inspired by popular attention mechanism and multi-scale strategies, and propose a cross-scale attention based haptic object recognition network for object-robot interaction. In particular, On the one hand, we design a cross-scale attention module in convolutional neural networks to acquire spatial contextual feature. On the other hand, we design a learnable bilinear fusion strategy to integrate above spatial contextual feature with original haptic feature, so as to effectively discriminate haptic images. Experimental results on ViTac dataset have shown the effectiveness of our approach.

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SV-3D BSC: Semantic communications from Single View to 3D Reconstruction

SV-3D BSC: Semantic Communications from Single View to 3D Re...

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IEEE International Conference on communications in China (ICCC)

作者： Congyan Wang Hao Xia Wenbo Ma Xitao He Mingkai Chen Kaipeng Zheng Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (数字)9798350378412

ISBN: (纸本)9798350378429

With the exploration of the virtual world, 3D reconstruction has drawn increasing attention. To achieve large-scale and low-latency virtual world interaction, data volume compression and visual experience are indispensable, but they tend to conflict in practice. Based on the above issues, we propose a semantic communication-based image transmission and 3D generation scheme (SV-3D BSC). First, we perform semantic segmentation on the image at the transmitter. In addition, at the receiver, we analyze the semantic symbols based on a common knowledge base and preliminarily restore the image through a generative adversarial network (GAN). Next, the restored image is further optimized for generating a Neural Radiance Fields (NeRF) representation. This scheme can greatly compress the data volume of virtual interaction and generate exquisite 3D models. Finally, experiments have shown that our scheme saves a lot of bandwidth and generates reasonable and colorful 3D models.

关键词： Solid modeling Three-dimensional displays Image coding Transmitters Semantics Receivers Neural radiance field

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An Improvement of AODV Protocol Based on Reliable Delivery in Mobile Ad Hoc networks

An Improvement of AODV Protocol Based on Reliable Delivery i...

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International Symposium on Information Assurance and Security (IAS)

作者： Jian Liu Fang-min Li Hubei Key Laboratory of Broadband Wireless Communication and Sensor Network& School of Information Engineering Wuhan University of Technology Wuhan China Hubei Key Laboratory of Broadband Wireless Communication and Sensor Network & School of Information Engineering Wuhan University of Technology Wuhan China

AODV protocol is a comparatively mature on-demand routing protocol in mobile ad hoc networks. However, the traditional AODV protocol seems less than satisfactory in terms of delivery reliability. This paper presents an AODV with reliable delivery (AODV-RD), a link failure fore-warning mechanism, metric of alternate node in order to better select, and also repairing action after primary route breaks basis of AODV-BR. Performance comparison of AODV-RD with AODV-BR and traditional AODV using ns-2 simulations shows that AODV-RD significantly increases packet delivery ratio (PDR). AODV-RD has a much shorter end-to-end delay than AODV-BR. It both optimizes the network performance and guarantees the communication quality.

关键词： Mobile ad hoc networks Routing protocols Telecommunication network reliability network topology wireless application protocol lab.ratories broadband communication wireless communication wireless sensor networks Reliability engineering

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A robust object tracking algorithm based on SURF

A robust object tracking algorithm based on SURF

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International Conference on wireless communications and Signal Processing (WCSP)

作者： Dan Zhou Dong Hu Education Ministry's Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications 210003 China

In this paper, we propose a robust object tracking algorithm based on SURF. First, we adopt a two-stage matching method to improve the accuracy of SURF matching points. Then a template update method is used to deal with the problem of object appearance change. Next we use matching points between new template and candidate region to locate the initial position of object. As template update and object occlusion will cause the accumulation of tracking errors, therefore, at last fixed template is used to correct object's position. For those frames which have little matching points, we use Meanshift instead of SURF to track object. The experiments demonstrate that our work is robust and can track object accurately in complex environments.

关键词： Target tracking Object tracking Video sequences Robustness Mathematical model Vectors

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Single-Satellite Interference Source Locating Based on Four Co-efficiency Beam 11th

Single-Satellite Interference Source Locating Based on Four ...

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11th EAI International Conference on wireless and Satellite Systems, WiSATS 2020

作者： Zhao, Laiding Zhiwei, Li Ruan, Cen Zheng, Yue Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing210003 China College of Communication Engineer Nanjing University of Posts and Telecommunications Nanjing210003 China College of Information Science and Electronic Engineering ZheJiang University ZheJiang310058 China

ISBN: (纸本)9783030690717

With the previous method based on the signal strength of the three-beam interference source [1], after studying and deriving the antenna gain pointing model, this paper proposes a single-star interference source localization method based on the signal strength of the four-beam interference source. As for solving the nonlinear directional equations, this paper proposes an improved particle swarm optimization algorithm to obtain its numerical solution, which is compared with the previous ordinary particle swarm optimization algorithm [2]. Then, using the least square method, the multi-group data is used to determine the interference source with the smallest error. First orientation and then positioning. After the simulation test of the proposed positioning method, the feasibility of the algorithm for positioning is proved. The method proposed in this paper is compared with the previous positioning method to prove the robustness of the algorithm. © 2021, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： Least squares approximations

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A Coverage Control Algorithm Based on Probability Model for Three-Dimensional wireless sensor networks

A Coverage Control Algorithm Based on Probability Model for ...

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第11届分布式计算及其应用国际学术研讨会

作者： Junqing Zhang Ruchuan Wang Yisheng Qian Qianyi Wang College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education

The main study of traditional probability coverage problem in wireless sensor networks(WSNs) is aiming at twodimensional space, however, most practical applications of wireless sensor network is placed in a three-dimensional sensor networks. Therefore, probability model is introduced for three-dimensional WSNs. This paper presents a method that using Voronoi divide to control the Scheduling of the probability model nodes in the target area. Also, a coverage control algorithm based on probability model(PMCCA) is proposed. We verify the effectiveness and the practice of PMCCA algorithm by comparing PMCCA algorithm to another algorithm in simulation experiment.

关键词： wireless sensor networks three-dimensional coverage probability model Voronoi divide

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On the Performance of Multiuser Dual-Hop Satellite Relaying 8th

On the Performance of Multiuser Dual-Hop Satellite Relaying

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8th International Conference on communications, Signal Processing, and Systems, CSPS 2019

作者： Kong, Huaicong Lin, Min Liu, Xiaoyu Ouyang, Jian Liu, Xin College of Telecommunications and Information Engineering Nanjing University of Posts and Telecommunications Nanjing210003 China The Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing210003 China School of Information and Communication Engineering Dalian University of Technology Dalian116024 China

ISBN: (纸本)9789811394089

This paper studies the system performance of a multiuser dual-hop satellite relaying network where the threshold-based decode-and-forward (DF) is adopted at the relay. Specifically, we can first get the maximum signal-to-noise ratio (SNR) formula of the satellite relaying network. Then, by supposing that both of the uplink and downlink channels are submitted to Shadowed-Rician (SR) fading, the exact expression for the system outage probability (SOP) of the satellite relaying network is derived. Moreover, we also obtain the asymptotic SOP with a high-SNR to provide more insight into the performance in terms of coding gain and diversity order. Finally, numerical examples not only demonstrate the correctness of the performance analysis, but show the impacts of the system parameters on the SOP of the satellite relaying network. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Satellites

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