TY - JOUR AU - Liu, J. AU - Ren, F. Y. AU - Miao, L. M. AU - Lin, C. T1 - A-ADHOC: An Adaptive Real-time Distributed MAC Protocol for Vehicular Ad Hoc Networks JO - Mobile Networks & Applications PY - 2011/october VL - 16 IS - 5 SP - 576 EP - 585 UR - M3 - 10.1007/s11036-010-0246-6 KW - L1 - SN - N1 - N1 - AB - Vehicular Ad Hoc Networks (VANET) are the foundation of Intelligent Traffic System (ITS), and recently many MAC protocols for VANET are proposed, among which a reliable MAC protocol called ADHOC has aroused much attention. By investigating the details of ADHOC protocol, we have discovered several unsolved problems that might lead to network failure. In this paper, we provide a quantitative analysis of the success probability for contending nodes and prove that an adaptive frame length is quite necessary. We propose Adaptive-ADHOC (A-ADHOC) MAC protocol, which implements a robust mechanism supporting the adaptive frame length. Evaluation result shows that A-ADHOC can maintain a high contending success probability and obtain about 50% reduction of response time over original ADHOC protocol, while providing important enhancement on network scalability and robustness. ER - TY - JOUR AU - Valdes-Garcia, Alberto AU - Nicolson, Sean T. AU - Lai, Jie-Wei AU - Natarajan, Arun AU - Chen, Ping-Yu AU - Reynolds, Scott K. AU - Zhan, Jing-Hong Conan AU - Kam, Dong G. AU - Liu, Duixian AU - Floyd, Brian A. T1 - A Fully Integrated 16-Element Phased-Array Transmitter in SiGe BiCMOS for 60-GHz Communications. JO - J. Solid-State Circuits PY - 2010/ VL - 45 IS - 12 SP - 2757 EP - 2773 UR - http://dblp.uni-trier.de/db/journals/jssc/jssc45.html#Valdes-GarciaNLNCRZKLF10 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - CONF AU - Chang, Chih-Yung AU - Chang, Hsu-Ruey AU - Liu, Hsiao-Jung AU - Chang, Sheng-Wen A2 - T1 - On Providing Temporal Full-Coverage by Applying Energy-Efficient Hole-Movement Strategies for Mobile WSNs. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 2778 EP - 2783 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#ChangCLC07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Li, Changle AU - Almhana, Jalal AU - Li, Jiandong AU - Liu, Zikuan A2 - T1 - An Adaptive Multiple Access Protocol for WLAN Equipped with Smart Antenna. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 2686 EP - 2690 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#LiALL07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Liu, Jing AU - Niu, Zhisheng A2 - T1 - A Dynamic Admission Control Scheme for QoS Supporting in IEEE 802.11e EDCA. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 3697 EP - 3702 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#LiuN07a M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Liu, Yuan AU - Huang, Chenling AU - Min, Hao AU - Li, Guohong AU - Han, Yifeng A2 - T1 - Digital Correlation Demodulator Design for RFID Reader Receiver. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 1664 EP - 1668 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#LiuHMLH07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Zhang, Peng AU - Liu, Hao AU - Hu, Jianhao A2 - T1 - A Novel Multiple-Access Scheme for Chirp UWB. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 1631 EP - 1635 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#ZhangLH07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Zhao, Gang AU - Liu, Xiangqian AU - Sun, Min-Te A2 - T1 - Energy-Aware Geographic Routing for Sensor Networks with Randomly Shifted Anchors. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 3454 EP - 3459 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#ZhaoLS07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Zheng, Vincent Wenchen AU - Zhang, Xinming AU - Liu, Daoke AU - Sung, Dan Keun A2 - T1 - A Joint Power Control, Link Scheduling and Rate Control Algorithm for Wireless Ad Hoc Networks. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 3636 EP - 3640 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#ZhengZLS07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Zheng, Yuan AU - Cao, Jiannong AU - Liu, Ming AU - Wang, Jinling A2 - T1 - Efficient Event Delivery in Publish/Subscribe Systems for Wireless Mesh Networks. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 4324 EP - 4329 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#ZhengCLW07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - CONF AU - Zhou, Yangfan AU - Ngai, Edith C. H. AU - Lyu, Michael R. AU - Liu, Jiangchuan A2 - T1 - POWER-SPEED: A Power-Controlled Real-Time Data Transport Protocol for Wireless Sensor-Actuator Networks. T2 - WCNC PB - IEEE CY - PY - 2007/ M2 - IS - SP - 3736 EP - 3740 UR - http://dblp.uni-trier.de/db/conf/wcnc/wcnc2007.html#ZhouNLL07 M3 - KW - dblp L1 - SN - 1-4244-0658-7 N1 - N1 - AB - ER - TY - JOUR AU - Zhang, Chun AU - Bailey, Dione K. AU - Awad, Tarif AU - Liu, Guoying AU - Xing, Guoliang AU - Cao, Manqiu AU - Valmeekam, Venu AU - Retief, Jacques AU - Matsuzaki, Hajime AU - Taub, Margaret AU - Seielstad, Mark AU - Kennedy, Giulia C. T1 - A whole genome long-range haplotype (WGLRH) test for detecting imprints of positive selection in human populations JO - Bioinformatics PY - 2006/ VL - 22 IS - 17 SP - 2122 EP - 2128 UR - http://bioinformatics.oxfordjournals.org/content/22/17/2122.abstract M3 - 10.1093/bioinformatics/btl365 KW - haplotype_length GWAS L1 - SN - N1 - N1 - AB - Motivation: The identification of signatures of positive selection can provide important insights into recent evolutionary history in human populations. Current methods mostly rely on allele frequency determination or focus on one or a small number of candidate chromosomal regions per study. With the availability of large-scale genotype data, efficient approaches for an unbiased whole genome scan are becoming necessary.Methods: We have developed a new method, the whole genome long-range haplotype test (WGLRH), which uses genome-wide distributions to test for recent positive selection. Adapted from the long-range haplotype (LRH) test, the WGLRH test uses patterns of linkage disequilibrium (LD) to identify regions with extremely low historic recombination. Common haplotypes with significantly longer than expected ranges of LD given their frequencies are identified as putative signatures of recent positive selection. In addition, we have also determined the ancestral alleles of SNPs by genotyping chimpanzee and gorilla DNA, and have identified SNPs where the non-ancestral alleles have risen to extremely high frequencies in human populations, termed ‘flipped SNPs’. Combining the haplotype test and the flipped SNPs determination, the WGLRH test serves as an unbiased genome-wide screen for regions under putative selection, and is potentially applicable to the study of other human populations.Results: Using WGLRH and high-density oligonucleotide arrays interrogating 116 204 SNPs, we rapidly identified putative regions of positive selection in three populations (Asian, Caucasian, African-American), and extended these observations to a fourth population, Yoruba, with data obtained from the International HapMap consortium. We mapped significant regions to annotated genes. While some regions overlap with genes previously suggested to be under positive selection, many of the genes have not been previously implicated in natural selection and offer intriguing possibilities for further study.Availability: the programs for the WGLRH algorithm are freely available and can be downloaded at http://www.affymetrix.com/support/supplement/WGLRH_program.zipContact:Giulia_Kennedy@affymetrix.comSupplementary Material: Three Supplementary tables ER - TY - JOUR AU - Zhang, Zhongshan AU - 0003, Ming Zhao AU - Zhou, Haiyan AU - Liu, Yuanan AU - Gao, Jinchun T1 - Frequency offset estimation with fast acquisition in OFDM system. JO - IEEE Communications Letters PY - 2004/ VL - 8 IS - 3 SP - 171 EP - 173 UR - http://dblp.uni-trier.de/db/journals/icl/icl8.html#ZhangZZLG04 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Li, Sheng-Yi AU - Liu, C. H. T1 - An analytical model to predict the probability density function of elevation angles for LEO satellite systems. JO - IEEE Communications Letters PY - 2002/ VL - 6 IS - 4 SP - 138 EP - 140 UR - http://dblp.uni-trier.de/db/journals/icl/icl6.html#LiL02 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Liu, Jianhan AU - Høst-Madsen, Anders T1 - Blind decoders for linear dispersion codes in downlink DS-CDMA systems. JO - IEEE Communications Letters PY - 2002/ VL - 6 IS - 7 SP - 285 EP - 287 UR - http://dblp.uni-trier.de/db/journals/icl/icl6.html#LiuH02 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Liu, Hung-Huan AU - Wu, Jean-Lien C. AU - Hsieh, Wan-Chih T1 - Delay analysis of integrated voice and data service for GPRS. JO - IEEE Communications Letters PY - 2002/ VL - 6 IS - 8 SP - 319 EP - 321 UR - http://dblp.uni-trier.de/db/journals/icl/icl6.html#LiuWH02 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Qin, Hao AU - Liu, Zengji AU - Zhang, Shi AU - Wen, Aijun T1 - Routing and wavelength assignment based on genetic algorithm. JO - IEEE Communications Letters PY - 2002/ VL - 6 IS - 10 SP - 455 EP - 457 UR - http://dblp.uni-trier.de/db/journals/icl/icl6.html#QinLZW02 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Rossetti, R. J. F. AU - Bordini, R. H. AU - Bazzan, A. L. C. AU - Bampi, S. AU - Liu, R. AU - Van Vliet, D. T1 - Using BDI agents to improve driver modelling in a commuter scenario JO - Transportation Research Part C-emerging Technologies PY - 2002/october VL - 10 IS - 5-6 SP - 373 EP - 398 UR - M3 - 10.1016/S0968-090X(02)00027-X KW - INFORMATION L1 - SN - N1 - N1 - AB - The use of multi-agent systems to model and to simulate real systems consisting of intelligent entities capable of autonomously co-operating with each other has emerged as an important field of research. This has been applied to a variety of areas, such as social sciences, engineering, and mathematical and physical theories. In this work, we address the complex task of modelling drivers' behaviour through the use of agent-based techniques. Contemporary traffic systems have experienced considerable changes in the last few years, and the rapid growth of urban areas has challenged scientific and technical communities. Influencing drivers' behaviour appears as an alternative to traditional approaches to cope with the potential problem of traffic congestion, such as the physical modification of road infrastructures and the improvement of control systems. It arises as one of the underlying ideas of intelligent transportation systems. In order to offer a good means to evaluate the impact that exogenous information may exert on drivers' decision making, we propose an extension to an existing microscopic simulation model called Dynamic Route Assignment Combining User Learning and microsimulAtion (DRACULA). In this extension, the traffic domain is viewed as a multi-agent world and drivers are endowed with mental attitudes, which allow rational decisions about route choice and departure time. This work is divided into two main parts. The first part describes the original DRACULA framework and the extension proposed to support our agent-based traffic model. The second part is concerned with the reasoning mechanism of drivers modelled by means of a Beliefs, Desires, and Intentions (BDI) architecture. In this part, we use AgentSpeak(L) to specify commuter scenarios and special emphasis is given to departure time and route choices. This paper contributes in that respect by showing a practical way of representing and assessing drivers' behaviour and the adequacy of using AgentSpeak(L) as a modelling language, as it provides clear and elegant specifications of BDI agents. (C) 2002 Elsevier Science Ltd. All rights reserved. ER - TY - JOUR AU - You, Hua AU - Liu, Zengji AU - Qiu, Zhiliang AU - Chen, Peng T1 - Design of an on-demand traffic converger. JO - IEEE Communications Letters PY - 2002/ VL - 6 IS - 4 SP - 156 EP - 158 UR - http://dblp.uni-trier.de/db/journals/icl/icl6.html#YouLQC02 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Zhang, Q. T. AU - Liu, D. P. T1 - A simple capacity formula for correlated diversity Rician fading channels. JO - IEEE Communications Letters PY - 2002/ VL - 6 IS - 11 SP - 481 EP - 483 UR - http://dblp.uni-trier.de/db/journals/icl/icl6.html#ZhangL02 M3 - KW - dblp L1 - SN - N1 - N1 - AB - ER -