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Displaying 1-31 out of 31 total
An Error-Minimizing Framework for Localizing Jammers in Wireless Networks
Found in: IEEE Transactions on Parallel and Distributed Systems
By Zhenhua Liu,Hongbo Liu,Wenyuan Xu,Yingying Chen
Issue Date:February 2014
pp. 508-517
Jammers can severely disrupt the communications in wireless networks, and jammers' position information allows the defender to actively eliminate the jamming attacks. Thus, in this paper, we aim to design a framework that can localize one or multiple jamme...
 
Error minimizing jammer localization through smart estimation of ambient noise
Found in: 2012 IEEE 9th International Conference on Mobile Ad-Hoc and Sensor Systems (MASS)
By Zhenhua Liu,Hongbo Liu,Wenyuan Xu,Yingying Chen
Issue Date:October 2012
pp. 308-316
Jammer can jeopardize the dependability of wireless networks, and jammer's position information allows the network to cope with jamming leveraging varieties of defense strategies. Thus, in this paper, we address the problem of localizing jammer. Prior work...
 
Localizing Multiple Jamming Attackers in Wireless Networks
Found in: Distributed Computing Systems, International Conference on
By Hongbo Liu, Zhenhua Liu, Yingying Chen, Wenyuan Xu
Issue Date:June 2011
pp. 517-528
Jamming attacks and unintentional radio interference are one of the most urgent threats harming the dependability of wireless communication and endangering the successful deployment of pervasive applications built on top of wireless networks. Unlike the tr...
 
Exploiting Jamming-Caused Neighbor Changes for Jammer Localization
Found in: IEEE Transactions on Parallel and Distributed Systems
By Zhenhua Liu,Hongbo Liu,Wenyuan Xu,Yingying Chen
Issue Date:March 2012
pp. 547-555
Jamming attacks are especially harmful when ensuring the dependability of wireless communication. Finding the position of a jammer will enable the network to actively exploit a wide range of defense strategies. In this paper, we focus on developing mechani...
 
Localizing jammers in wireless networks
Found in: Pervasive Computing and Communications, IEEE International Conference on
By Hongbo Liu, Wenyuan X, Yingying Chen, Zhenhua Liu
Issue Date:March 2009
pp. 1-6
Wireless communication is susceptible to radio interference and jamming attacks, which prevent the reception of communications. Most existing anti-jamming work does not consider the location information of radio interferers and jammers. However, this infor...
 
Group Secret Key Generation via Received Signal Strength: Protocols, Achievable Rates, and Implementation
Found in: IEEE Transactions on Mobile Computing
By Hongbo Liu,Jie Yang,Yan Wang,Yingying Jennifer Chen,Can Emre Koksal
Issue Date:December 2014
pp. 2820-2835
Secret key generation among wireless devices using physical layer information of radio channel has been an attractive alternative for ensuring security in mobile environments. Received signal strength (RSS) based secret key extraction gains much attention ...
 
A Novel Process Network Model for Interacting Context-Aware Web Services
Found in: IEEE Transactions on Services Computing
By Xiuguo Zhang,Hongbo Liu,Ajith Abraham
Issue Date:July 2013
pp. 344-357
Context-aware web services have been attracting significant attention as an important approach for improving the usability of web services. In this paper, we explore a novel approach to model dynamic behaviors of interacting context-aware web services, aim...
 
Sensing Driver Phone Use with Acoustic Ranging through Car Speakers
Found in: IEEE Transactions on Mobile Computing
By Jie Yang,Simon Sidhom,Gayathri Chandrasekaran,Tam Vu,Hongbo Liu,Nicolae Cecan,Yingying Chen,Marco Gruteser,Richard P. Martin
Issue Date:September 2012
pp. 1426-1440
This work addresses the fundamental problem of distinguishing between a driver and passenger using a mobile phone, which is the critical input to enable numerous safety and interface enhancements. Our detection system leverages the existing car stereo infr...
 
A Bigraph Model for Multi-route Choice in Urban Rail Transit
Found in: Communication Systems and Network Technologies, International Conference on
By Huawei Zhai, Weishi Zhang, Licheng Cui, Hongbo Liu, Ajith Abraham
Issue Date:June 2011
pp. 699-703
The conventional methods to solve the multi-route choice problems in transportation domain usually focus on the feelings and behaviors of human beings, which lead the conclusion of conjectured not to be reasonable, such as fare clearing or passenger flow d...
 
Analysis of Bank Performance Appraisal Based on the Contingency Theory
Found in: International Conference on E-Business and E-Government
By Yang Hongbo,Liu Fangfang
Issue Date:May 2010
pp. 911-914
Presently, performance appraisal is one of the most active areas under discussion in theory and practice of bank management, from which various methods and theories have been put forward one after another. Face the complicated internal and external bank en...
 
Hierarchical Takagi-Sugeno Models for Online Security Evaluation Systems
Found in: Information Assurance and Security, International Symposium on
By Ajith Abraham, Crina Grosan, Hongbo Liu, Yuehui Chen
Issue Date:August 2009
pp. 687-692
Risk assessment is often done by human experts, because there is no exact and mathematical solution to the problem. Usually the human reasoning and perception process cannot be expressed precisely. This paper propose a light weight risk assessment system b...
 
ChIP-seq Data Plays an Important Role in a Cytosine-Based DNA Methylation Prediction Model
Found in: Fuzzy Systems and Knowledge Discovery, Fourth International Conference on
By Jie Lv, Yan Zhang, Yunfeng Qi, Hongbo Liu, Jiang Zhu, Jianzhong Su, Ruijie Zhang
Issue Date:August 2009
pp. 33-36
DNA methylation was found previously related with histone modifications. The relationship among DNA methylation and histone modifications is potentially identifiable by integrating ChIP-seq and methylation data. However, little has been addressed on this i...
 
A Swarm-Based Rough Set Approach for Group Decision Support Systems
Found in: Hybrid Intelligent Systems, International Conference on
By Mingyan Zhao, Hongbo Liu, Ajith Abraham, Emilio Corchado
Issue Date:August 2009
pp. 365-369
This paper present a class of investment problem, in which many items could be chosen in a group decision environment. Usually there is a decision table from the board of directors after discussions. Most of the data come from their experience or estimatio...
 
Coal Mill Control and Optimization Using a Multilayer Structure
Found in: Intelligent Systems, WRI Global Congress on
By Yunhui Luo, Lei Jia, Wenjian Cai, Hongbo Liu
Issue Date:May 2009
pp. 218-222
Ball mill coal pulverizing system is a multiple-input multiple-output (MIMO) process characterized with strong couplings and nonlinearities. Conventional control methods maybe work well initially, but will deviate from optimal work point for a period of ti...
 
ILMOP Approach for Optimal Eco-campus Energy Sources System Structure
Found in: Business and Information Management, International Seminar on
By Xuehua Zhang, Hongwei Zhang, Tegang Deng, Hongbo Liu, Qingfei Guo
Issue Date:December 2008
pp. 252-254
The paper analyzed the present energy sources situation in China, and put forward an Inexact Linear Multi-Objective-Program (ILMOP) approach for eco-campus energy sources system based on the characters analysis of eco-campus system. The ILMOP model objecti...
 
A Novel Near-Field Localization Method Based on Second Order Statistics
Found in: Image and Signal Processing, Congress on
By Hongbo Liu, Wei Zhang
Issue Date:May 2008
pp. 29-33
The bearing and range estimation of near-field sources is studied and a novel method is presented. In our proposed algorithm the second-order statistics was used to estimate bearing of near-field sources. By exploiting the Toeplitz property of covariance m...
 
A Fuzzy Particle Swarm Approach to Multiobjective Quadratic Assignment Problems
Found in: Asia International Conference on Modelling & Simulation
By Mingyan Zhao, Ajith Abraham, Crina Grosan, Hongbo Liu
Issue Date:May 2008
pp. 516-521
The multiobjective Quadratic Assignment Problem (mQAP) is considered as one of the hardest optimization problems but with many real-world applications. Since it may not be possible to simply weight the importance of each flow for the mQAP, it is best to us...
 
A Particle Swarm Optimization Algorithm for Neighbor Selection in Peer-to-Peer Networks
Found in: Computer Information Systems and Industrial Management Applications, International Conference on
By Shichang Sun, Ajith Abraham, Guiyong Zhang, Hongbo Liu
Issue Date:June 2007
pp. 166-172
Peer-to-peer (P2P) topology has significant influence on the performance, search efficiency and functionality, and scalability of the application. In this paper, we propose a Particle Swarm Optimization (PSO) approach to the problem of Neighbor Selection (...
 
Particle Swarm Approach to Scheduling Work-Flow Applications in Distributed Data-Intensive Computing Environments
Found in: Intelligent Systems Design and Applications, International Conference on
By Hongbo Liu, Shichang Sun, Ajith Abraham
Issue Date:October 2006
pp. 661-666
The scheduling problem in distributed data-intensive computing environments has been an active research topic due to immense practical applications. In this paper, we model the scheduling problem for work-Flow applications in distributed Data-intensive com...
 
A new way to enumerate cycles in graph
Found in: Advanced International Conference on Telecommunications / Internet and Web Applications and Services, International Conference on
By Hongbo Liu, Jiaxin Wang
Issue Date:February 2006
pp. 57
In many cases, the topology of communcation systems can be abstracted and represented as graph. Graph theories and algorithms are useful in these situations. In this paper, we introduced an algorithm to enumerate all cycles in a graph. It can be applied on...
 
Fuzzy Adaptive Turbulent Particle Swarm Optimization
Found in: Hybrid Intelligent Systems, International Conference on
By Hongbo Liu, Ajith Abraham
Issue Date:December 2005
pp. 445-450
In this paper, we introduce Turbulence in the Particle Swarm Optimization (TPSO) and illustrate how this approach could be used for function optimization problems involving high dimensions. The proposed algorithm uses a minimum velocity threshold to contro...
 
Hybrid Fuzzy-Genetic Algorithm Approach for Crew Grouping
Found in: Intelligent Systems Design and Applications, International Conference on
By Hongbo Liu, Zhanguo Xu, Ajith Abraham
Issue Date:September 2005
pp. 332-337
Crew grouping is an important problem and formulating a good solution always involves many challenges. For example, grouping soldiers intelligently to tank combat units, we should take into consideration the combined technical proficiency of the soldiers, ...
 
A Study of Localization Accuracy Using Multiple Frequencies and Powers
Found in: IEEE Transactions on Parallel and Distributed Systems
By Xiuyuan Zheng,Hongbo Liu,Jie Yang,Yingying Chen,Richard P. Martin,Xiaoyan Li
Issue Date:August 2014
pp. 1955-1965
Wireless localization using the received signal strength (RSS) can have tremendous savings over using specialized positioning infrastructures. In this work, we explore improving RSS localization performance in multipath environments by varying the transmit...
 
Distributed Consensus-based Weight Design for Cooperative Spectrum Sensing
Found in: IEEE Transactions on Parallel and Distributed Systems
By Wenlin Zhang,Yi Guo,Hongbo Liu,Yingying Chen,Zheng Wang,Joseph Mitola
Issue Date:March 2014
pp. 1
In this paper, we study the distributed spectrum sensing in cognitive radio networks. Existing distributed consensusbased fusion algorithms only ensure equal gain combining of local measurements, whose performance may be incomparable to various centralized...
 
Accurate WiFi Based Localization for Smartphones Using Peer Assistance
Found in: IEEE Transactions on Mobile Computing
By Hongbo Liu,Jie Yang,Simon Sidhom,Yan Wang,Yingying Chen,Fan Ye
Issue Date:January 2014
pp. 1
Highly accurate indoor localization of smartphones is critical to enable novel location based features for users and businesses. In this paper, we first conduct an empirical investigation of the suitability of WiFi localization for this purpose. We find th...
 
A Study of Localization Accuracy using Multiple Frequencies and Powers
Found in: IEEE Transactions on Parallel and Distributed Systems
By Xiuyuan Zheng,Hongbo Liu,Jie Yang,Yingying Chen,Richard P. Martin,Xiaoyan Li
Issue Date:November 2013
pp. 1
Wireless localization using the received signal strength (RSS) can have tremendous savings over using specialized positioning infrastructures. In this work, we explore improving RSS localization performance in multipath environments by varying the transmit...
 
Measuring human queues using WiFi signals
Found in: Proceedings of the 19th annual international conference on Mobile computing & networking (MobiCom '13)
By Hongbo Liu, Jie Yang, Marco Gruteser, Richard P. Martin, Yan Wang, Yingying Chen
Issue Date:September 2013
pp. 235-238
We investigate using smartphone WiFi signals to track human queues, which are common in many business areas such as retail stores, airports, and theme parks. Real-time monitoring of such queues would enable a wealth of new applications, such as bottleneck ...
     
Push the limit of WiFi based localization for smartphones
Found in: Proceedings of the 18th annual international conference on Mobile computing and networking (Mobicom '12)
By Fan Ye, Hongbo Liu, Jie Yang, Simon Sidhom, Yan Wang, Yingying Chen, Yu Gan
Issue Date:August 2012
pp. 305-316
Highly accurate indoor localization of smartphones is critical to enable novel location based features for users and businesses. In this paper, we first conduct an empirical investigation of the suitability of WiFi localization for this purpose. We find th...
     
Accuracy characterization of cell tower localization
Found in: Proceedings of the 12th ACM international conference on Ubiquitous computing (Ubicomp '10)
By Alexander Varshavsky, Hongbo Liu, Jie Yang, Marco Gruteser, Yingying Chen
Issue Date:September 2010
pp. 223-226
Cell tower triangulation is a popular technique for determining the location of a mobile device. However, cell tower triangulation methods require the knowledge of the actual locations of cell towers. Because the locations of cell towers are not publicly a...
     
Analysis on MAC layer retransmission scheme in wireless networks
Found in: Proceedings of the 6th ACM international symposium on Mobility management and wireless access (MobiWac '08)
By Changqing An, Hongbo Liu, Jiahai Yang, Jianping He, Xuenong Li
Issue Date:October 2008
pp. 144-148
Due to poor Signal to Noise and Interference Ratio (SNIR) in wireless networks, retransmission schemes are proposed to improve the transmission performance. These retransmission schemes can be classified into three levels-frame level, block level and bit l...
     
Image analysis by analogy with Taylor expansion
Found in: Proceedings of the 20th spring conference on Computer graphics (SCCG '04)
By Hongbo Liu, Xiukun Wang, Ye Ji
Issue Date:April 2004
pp. 209-211
The Taylor expansion has shown - in many fields - to be an extremely powerful tool. In this paper, we investigated image features and their relationships by analogy with Taylor expansion. The kind of expansion could be used to investigate positions of imag...
     
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