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Compromised nodes in wireless sensor network

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APWeb 2006 International Workshops: XRA, IWSN, MEGA, and ICSE

作者： Lin, Zhi-Ting Qu, Yu-Gui Jing, Li Zhao, Bao-Hua University of Science and Technology of China MOE-Microsoft Key Laboratory of Multimedia Computing and Communication Department of Electronic Engineering and Information Science Hefei Anhui 230027 China

ISBN: (纸本)3540311580

Sensor webs consisting of nodes with limited battery power and wireless communication are deployed to collect useful information from a variety of environments. A new challenge in the wireless sensor networks (WSN) is the compromised nodes problem. Compromised nodes may exhibit arbitrary behavior and may collude with other compromised nodes. In this paper, we propose a novel security strategy with assistant cluster heads, SSACH, which focuses on limiting the attack from compromised nodes. It adds the Assistant Cluster Heads (ACH) so as to monitor Cluster Head (CH) and take precautions against the inside attack. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Wireless telecommunication systems

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Study on the property of training samples and learning space with genetic algorithms

Study on the property of training samples and learning space...

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SNPD 2007: 8th ACIS International Conference on software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed computing

作者： He, Jingsong Tang, Jian Fang, QianSheng MOE-Microsoft Key Laboratory of Multimedia Computing and Communication Department of Electronic Science and Technology University of Science and Technology of China Anhui Institute of Architecture and Industry China

ISBN: (纸本)0769529097

Historically, the empirical risk of a pattern classifier was asked to be made zero, therefor the default property of training samples were limited to a separable ones. Nowadays on the contrary, the major idea of learning classification no longer ask the empirical risk of classifier must be made zero. In this situation, inseparable feature sets may not be detrimental to the performance of classifier. However, so far no experimental studies and analytical results show whether an inseparable feature set is available or not. This paper firstly analyzes the interaction between learning algorithms and feature selection, and gives a proof by both the analytical analysis and experimental studies. © 2007 IEEE.

关键词： Learning systems

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Image quality assessment metrics with radon transform

Image quality assessment metrics with radon transform

引用

2008 IEEE International Conference on Systems, Man and Cybernetics, SMC 2008

作者： Pang, Jianxin Zhang, Rong Zhang, Hui Huang, Xuan Liu, Zhen Kai MOE-Microsoft Key Laboratory of Multimedia Computing and Communication Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei Anhui 230027 China

Objective image quality assessment (QA) is a fundamental and challenging job in image processing which evaluates the image quality consistently with human perception automatically. Generally, an image can be segmented into two kinds of areas: structure and texture. And structural information plays a much more important role between the two. The pixels, edges and shape with directional characteristic contribute much more to the structural information. In this paper, the structural information is modeled as the energy of directional projection, which is shown in a directional projection-based map that is built by Radon transform. On the assumption that any image's distortion could be modeled as the difference between the directional projection-based maps of reference and distortion images, we propose a new objective quality assessment method with Radon transform for full reference model, and we also try to explore the feasibility to develop the image QA metrics with scalable efficiency and computational cost. Experimental results show that the proposed Metrics are well consistent with the subjective quality score. © 2008 IEEE.

关键词： Image quality

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AutoGR: Automated geo-replication with fast system performance and preserved application semantics 47th

AutoGR: Automated geo-replication with fast system performan...

引用

47th International Conference on Very Large Data Bases, VLDB 2021

作者： Wang, Jiawei Li, Cheng Ma, Kai Huo, Jingze Yan, Feng Feng, Xinyu Xu, Yinlong University of Science and Technology of China China University of Nevada Reno United States State Key Laboratory for Novel Software Technology Nanjing University China Anhui Province Key Laboratory of High Performance Computing China

Geo-replication is essential for providing low latency response and quality Internet services. However, designing fast and correct geo-replicated services is challenging due to the complex trade-off between performance and consistency semantics in optimizing the expensive cross-site coordination. State-of-the-art solutions rely on programmers to derive sufficient application-specific invariants and code specifications, which is both time-consuming and errorprone. In this paper, we propose an end-to-end geo-replication deployment framework AutoGR (AUTOmated Geo-Replication) to free programmers from such label-intensive tasks. AutoGR enables the geo-replication features for non-replicated, serializable applications in an automated way with optimized performance and correct application semantics. Driven by a novel static analyzer Rigi, AutoGR can extract application invariants by verifying whether their geo-replicated versions obey the serializable semantics of the non-replicated application. Rigi takes application codes as inputs and infers a set of side effects and path conditions possibly leading to consistency violations. Rigi employs the Z3 theorem prover to identify pairs of conflicting side effects and feed them to a georeplication framework for automated across-site deployment. We evaluate AutoGR by transforming four serializable and originally non-replicated DB-compliant applications to geo-replicated ones across 3 sites. Compared with state-of-the-art human-interventionfree automated approaches (e.g., strong consistency), AutoGR reduces up to 61.8% latency and achieves up to 2.12× higher peak throughput. Compared with state-of-the-art approaches relying on a manual analysis (e.g., PoR), AutoGR can quickly enable the georeplication feature with zero human intervention while offering similarly low latency and high throughput. © by the owner/author(s).

关键词： Semantics

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A Global-Energy-Balancing Real-Time Routing in Wireless Sensor Networks

A Global-Energy-Balancing Real-Time Routing in Wireless Sens...

引用

IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Peilong Li Yu Gu Baohua Zhao Department of Computer Science Anhui Province Key Laboratory of Software in Computing and Communication University of Science and Technology Hefei Anhui China

Many applications in wireless sensor networks like video surveillance have the requirement of timely data delivery. Real-time routing is needed in these applications. Because of the limitation of node energy, energy efficiency is also an important concern in routing protocol design in order to increase the network lifetime. In this paper, we propose a global-energy-balancing routing scheme (GEBR) for real-time traffic based on directed diffusion (DD), which balances node energy utilization to increase the network lifetime. GEBR can find an optimal path in sensor networks for data transfer considering global energy balance and limited delivery delay. Simulation results show that GEBR significantly outperforms DD in uniform energy utilization. GEBR achieves better global energy balance and longer network lifetime. The time for real-time service of the sensor networks using GEBR is prolonged by about 4.37% and the network lifetime is prolonged by 44.6%.

关键词： Wireless sensor networks Routing protocols Delay Computer networks Energy efficiency Computer science Laboratories Wireless application protocol Global Positioning System Video surveillance

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A Secure Routing Protocol with Malicious Nodes Detecting and Diagnosing Mechanism for Wireless Sensor Networks

A Secure Routing Protocol with Malicious Nodes Detecting and...

引用

IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Yuan-xi Jiang Bao-hua Zhao Department of Computer Science Anhui Province Key Laboratory of software in Computing and Communication University of Science and Technology Hefei Anhui China

Routing protocol security is the key element in the research of secure wireless sensor networks. Due to its special characteristic, designing security routing protocol is a challenge in these networks. A secure routing protocol with malicious nodes detecting and diagnosing mechanism is used to reduce the malicious nodes' threat to the WSNs.

关键词： Routing protocols Wireless sensor networks Data security Monitoring communication system security Computer networks Sensor phenomena and characterization Cryptography Relays Resumes

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Constraint-aware and multi-objective optimization for micro-service composition in mobile edge computing

Constraint-aware and multi-objective optimization for micro-...

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作者： Wu, Jintao Zhang, Jingyi Zhang, Yiwen Wen, Yiping School of Software Nanjing University of Information Science and Technology Nanjing China School of Computer Science and Technology Anhui University Anhui China Hunan Key Laboratory for Service Computing and Novel Software Technology Hunan University of Science and Technology Hunan China

As a new paradigm of distributed computing, mobile edge computing (MEC) has gained increasing attention due to its ability to expand the capabilities of centralized cloud computing. In MEC environments, a software application typically consists of multiple micro-services, which can be composed together in a flexible manner to achieve various user requests. However, the composition of micro-services in MEC is still a challenging research issue arising from three aspects. Firstly, composite micro-services constructed by ignoring the processing capabilities of different micro-services may cause waste of edge resources. Secondly, edge servers' limitations in terms of computational power can easily cause service occupancy between composite micro-services, severely affecting the user experience. Thirdly, in dynamic and unstable mobile environments, different edge users have different sensitivities to request latency, which increases the complexity of micro-service composition. In order to improve edge resource utilization and user experience on micro-service invocations, in this paper, we comprehensively consider the above three factors, and we first model the micro-services composition problem in MEC as a constrained multi-objective optimization problem. Then, a micro-service composition optimization method M3C combining graph search and branch-and-bound strategy is proposed to find a composition solution set with low energy consumption and high success rate for multiple edge users. Finally, we perform a series of experiments on two widely used datasets. Experimental results show that our proposed approach significantly outperforms the four competing baseline approaches, and that it is sufficiently efficient for practical deployment. © 2023 John Wiley & Sons Ltd.

关键词： Multiobjective optimization

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Infrared Facial Expression Recognition Using Wavelet Transform

Infrared Facial Expression Recognition Using Wavelet Transfo...

引用

International Symposium on Computer Science and Computational Technology, ISCSCT

作者： Shangfei Wang Siliang Lv Xufa Wang Department of Computer Science and Technology Key Laboratory of Software Computing and Communication Anhui University of Science and Technology Hefei Anhui China

Since infrared images reflect the temperature-field distributing of vein¿s embranchment of the face, expression recognition from them should focus on changes of thermal distribution on facial muscles and blood vessels, which caused by mood variety. These thermal changes can be regarded as texture features of images. Wavelet transform is a good tool to analyze multi-scale, multi- direction changes of texture. Therefore, this paper presented a facial expression recognition method from thermal images using wavelet transform. Firstly, the status quo of the researches on infrared facial expression recognitions was briefly surveyed and analyzed. Secondly, wavelet transforms were used to extract image features. Thirdly, the ¿Euclidian Distance Maximizing Method¿ we proposed was adopted to select features. Then principal component analysis was employed to reduce feature dimension and NN was used as a classifier. Finally, experiments on medium-wave thermal facial expressions database of Equinox evaluated the effectiveness of our approach.

关键词： Face recognition Wavelet transforms Image recognition Infrared imaging Emotion recognition Facial muscles Blood vessels Biomedical imaging Mood Wavelet analysis

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Secure Location Verification Using Hop-Distance Relationship in Wireless Sensor Networks

Secure Location Verification Using Hop-Distance Relationship...

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IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Yongsheng Liu Hao Zhou Baohua Zhao Department of Computer Science Anhui Province Key Laboratory of Software in Computing and Communication University of Science and Technology Hefei Anhui China

With the growing prevalence of wireless sensor networks comes a new need for location-based access control mechanisms. Thus we need a method to perform location verification to enforce location-based access to information resources. In this work, a statistic location verification algorithm in randomly deployed sensor networks is proposed. The nodes in the networks are classified to three roles. The claimer broadcasts the position message. The witnesses rebroadcast it and report the distance and lowest hop information to the verifier. The verifier makes use of hypothesis tests to make a decision. At last the simulation results confirm the validation of the algorithm.

关键词： Wireless sensor networks Computer networks Access control Information resources Statistics Broadcasting Computer science Laboratories Testing Computer worms

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A Gong-Si-Shaped Heterogeneous Circular-Polarization Array for 5G Application 5

A Gong-Si-Shaped Heterogeneous Circular-Polarization Array f...

引用

5th IEEE International Conference on Electronic Information and communication Technology, ICEICT 2022

作者： Zhou, Wei Qi, Junwei Li, Yingsong Huang, Zhixiang Yang, Lixia College of Information and Communication Engineering Harbin Engineering University Harbin150001 China Anhui Province Key Laboratory of Target Recognition and Feature Extraction LuAn230088 China Anhui University Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Hefei China

ISBN: (数字)9781665472111

ISBN: (纸本)9781665472111

In this work, a Gong-Si-shaped circularly polarized (CP) array with power driver for 5G is proposed. The radiator of the constructed CP array consists of two Chinese-like characters ' and '' with the similar size and pronunciation of 'gong' and 'si', Two L-shaped feeding probes of the same size are connected to the designed power driver printed on the bottom layer of ground plate, and the array can radiate circular polarization electromagnetic waves by changing the positions of the L-shaped probes and the angle of the horizontal parts of the L-shaped probes. From the simulating and optimizing, it is finally obtained that the -15 dB bandwidth of modeled Gong-Si-like CP antenna lies in 2.49 - 2.81 GHz and the presented Gong-Si-like CP antenna has a axial bandwidth covering 2.36 - 2.82 GHz, which meets the n41 5G band implementing at 2.515 - 2.675 GHz. © 2022 IEEE.

关键词： Circular polarization

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