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Search Results: 1 - 10 of 70829 matches for " GUO Liang-min "
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Node-failure Tolerance of Topology in Wireless Sensor Networks
Liang-Min Wang,Jian-Feng Ma,Yan-Bo Guo
International Journal of Network Security , 2008,
Abstract: Three basic questions are presented and answered in researching on node-failure topology in wireless sensor network. First, what is the definition of node-failure tolerance? Second, how to evaluate this tolerance ability? Third, which type of topologies is more efficient in tolerating node-failure?
Security Topology Control Method for Wireless Sensor Networks with Node-Failure Tolerance Based on Self-Regeneration
Liang-Min Wang,Yuan-Bo Guo,Yong-Zhao Zhan
EURASIP Journal on Wireless Communications and Networking , 2010, DOI: 10.1155/2010/201416
Abstract: Wireless sensor networks are often deployed in hostile and unattended environments. The nodes will be failure by fault, intrusion, and the battery exhaustion. Node-failure tolerance is an acceptable method to improve the networks' lifetime. Then two key problems for topology control are presented: first, how to get a node-failure topology when there is intrusion from the nodes of hostile enemies? second, how to sustain this node-failure topology with all deployed nodes being exhausted ultimately? We propose a novel approach for topology control and prove that it is node-failure tolerant. The approach contains three phases: topology discovery, topology update, and topology regeneration. A tricolor-based method is proposed to build architecture with high tolerance ability and some security protocols are employed to preclude the hostile nodes in discovery phase. In update and regeneration phases, the newly deployed nodes are regarded as renewable resource to fill in the consumed energy, enhance the debased node-failure tolerance ability, and prolong network lifetime, and a security protocol with forward and backward secrecy is devised to adapt the topology changed by node failure and node joining. Some attributes of the presented method are shown by simulations, and differences are given by comparison with related work.
Security Topology Control Method for Wireless Sensor Networks with Node-Failure Tolerance Based on Self-Regeneration
Wang Liang-Min,Guo Yuan-Bo,Zhan Yong-Zhao
EURASIP Journal on Wireless Communications and Networking , 2010,
Abstract: Wireless sensor networks are often deployed in hostile and unattended environments. The nodes will be failure by fault, intrusion, and the battery exhaustion. Node-failure tolerance is an acceptable method to improve the networks' lifetime. Then two key problems for topology control are presented: first, how to get a node-failure topology when there is intrusion from the nodes of hostile enemies? second, how to sustain this node-failure topology with all deployed nodes being exhausted ultimately? We propose a novel approach for topology control and prove that it is node-failure tolerant. The approach contains three phases: topology discovery, topology update, and topology regeneration. A tricolor-based method is proposed to build architecture with high tolerance ability and some security protocols are employed to preclude the hostile nodes in discovery phase. In update and regeneration phases, the newly deployed nodes are regarded as renewable resource to fill in the consumed energy, enhance the debased node-failure tolerance ability, and prolong network lifetime, and a security protocol with forward and backward secrecy is devised to adapt the topology changed by node failure and node joining. Some attributes of the presented method are shown by simulations, and differences are given by comparison with related work.
Feeding efficiency of a marine copepod Acartia erythraea on eight different algal diets

Sheng Liu,Tao Li,Hui Huang,Zhi-Ling Guo,Liang-Min Huang,Wen-Xiong Wang,

生态学报 , 2010,
Abstract:
Distribution characteristics and pollution of nitrogen and phosphorus in core sediments of marine culture area in Dapeng Cove
大鹏澳养殖区柱状沉积物中氮、磷的分布特征及污染状况研究

HUANG Xiao-ping,GUO Fang,HUANG Liang-min,
黄小平
,郭芳,黄良民

热带海洋学报 , 2010,
Abstract: In order to study accumulation effects of marine culture on sediments, the contents and profile distribution characteristics of total nitrogen (TN), total phosphorus (TP) and total organic carbon (TOC) in core sediments from marine culture areas of Dapeng Cove in the Daya Bay were investigated. The pollution status of nitrogen and phosphorus of marine culture area were discussed. The results show that the contents of TN in cage culture, shellfish culture and control areas are in the range of 638.2-3 803.9mg.kg-1, 740.9-2 152.1mg.kg-1 and 343.2-471.9mg.kg-1, respectively; the contents of TP are in the range of 344.7-3 233.9mg.kg-1, 297.9-497.5mg.kg-1 and 650.2-1 327.2mg.kg-1, respectively; the contents of TOC are in the range of 0.96%-2.22%, 0.87%-1.13% and 0.69%–0.95%, respectively. The vertical distributions of the TN, TP and TOC contents increased from the bottom to surface layers in the study areas and the variation range in upper layers was greater than that in lower layers. The profile distributions of the contents increased most drastically in the cage culture area, followed by those in the shellfish culture area and least in the control area. The contents of TN in core sediment samples all exceeded the assessment standard, while the most serious one was in the cage cul-ture area, followed by the shellfish area and least in the control area. The contents of TP only exceeded the standard in the cage cul-ture area in the surface layer, while the contents of TP in the shellfish culture area and control area did not exceed the assessment standard.
A quality-driven algorithm for task scheduling in grid market
网格市场中服务质量驱动下的任务调度算法

SONG Hu,YANG Shou-Bao,LIU Xiao-Qian,GUO Liang-Min,
宋浒
,杨寿保,刘晓茜,郭良敏

中国科学院研究生院学报 , 2011,
Abstract: We propose a quality-driven algorithm for task scheduling in grid market, which is deadline- and budget-constrained and maximizes number of completed tasks (DBCN). This algorithm combines the high throughput advantage of Min-min algorithm and the global optimization advantage of linear programming. Meanwhile the algorithm considers not only all the tasks but also those prior ones. Compared with the Min-min and DBCT classical algorithms, DBCN completes about 10.6% and 22.0% more tasks and about 20% and 40% more prior tasks, respectively.
Improved multi-objective genetic algorithm based on NSGA-II
基于NSGA-II的改进多目标遗传算法

CHEN Xiao-qing,HOU Zhong-xi,GUO Liang-min,LUO Wen-cai,
陈小庆
,侯中喜,郭良民,罗文彩

计算机应用 , 2006,
Abstract: Based on the study and analysis of NSGA-II algorithm, a new initial screening mechanism was designed, coefficient generating of crossover arithmetic operator was improved and more reasonable crowding mechanism was proposed. In this way, convergence was speeded up and its precision was improved. The testing results by representative applied functions show that with the improvements higher computational efficiency and more reasonable distributed solution can be obtained, and diversified distribution of the solutions can be maintained.
Patrol Detection for Replica Attacks on Wireless Sensor Networks
Liang-Min Wang,Yang Shi
Sensors , 2011, DOI: 10.3390/s110302496
Abstract: Replica attack is a critical concern in the security of wireless sensor networks. We employ mobile nodes as patrollers to detect replicas distributed in different zones in a network, in which a basic patrol detection protocol and two detection algorithms for stationary and mobile modes are presented. Then we perform security analysis to discuss the defense strategies against the possible attacks on the proposed detection protocol. Moreover, we show the advantages of the proposed protocol by discussing and comparing the communication cost and detection probability with some existing methods.
Impact of phosphorus supply on growth and amino acid composition and concentration of Eucalyptus regnans F. Muell. seedlings
施用磷对王桉 (Eucalyptus regnans F. Muell.)幼苗生长及其氨基酸组

Wang Liang-Min,
王良民

生态学报 , 2009,
Abstract: Eucalyptus regnans F. Muell. is one of the most commercially important timber trees in Australia. Study on the relationship between fertilizer application, amino acid accumulation and transformation and insect herbivory for eucalypts is both economically and ecologically necessary. E. regnans seedlings were grown with two rates of phosphorus (100 and 200 kg hm-2) in two soils with different P fixation capacity. The seedlings were grown in a glasshouse with 4 replicates. Experiment results showed: 1) seedling growth was significantly affected by the different soils and P treatment; 2) N and P concentrations in plant components were not significantly different with the soil and P treatments, while N and P concentrations in leaves decreased with leaf age; 3) amino acid concentration of xylem sap was dominated by glutamine and significantly affected by P application (concentration in xylem sap of seedlings grown with 100 kg hm-2 was 2 times more than that with 200 kg hm-2); 4) amino acid composition and concentration in leaves significantly changed with leaf age, particularly for arginine which was several-fold greater in old leaves than in young leaves. The change of arginine concentration in leaves is most likely due to some protein degradation and in situ arginine synthesis because arginine is not generally phloem sap mobile. The fact that glutamine concentration in xylem sap was dominant and inversely related to seedling growth suggests that specific nitrogenous solutes may be useful indices of the nitrogen status of E. regnans for insect herbivory.
{N-[1-(1H-Benzimidazol-2-yl)ethylidene-κN3]-3-(1H-imidazol-1-yl)propan-1-amine-κN}dibromidomercury(II)
Qing Wang,Zhong-Ye Fu,Liang-Min Yu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811051166
Abstract: In the title compound, [HgBr2(C15H17N5)], the HgII ion is tetrahedrally coordinated by two N atoms of the N-[1-(1H-benzimidazol-2-yl)ethylidene-κN]-3-(1H-imidazol-1-yl)propan-1-amine ligand, and two bromide anions. Intermolecular benzimidazole–imidazole N—H...N hydrogen bonds link the molecules into helical chains along the b-axis direction and C—H...Br hydrogen bonds link these chains into layers parallel to the bc plane.
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