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提出了一种基于改进教与学优化（TLBO）的DVHop定位算法。通过添加修正因子来修正锚节点的平均每跳距离，减小距离估计的误差；然后引入共线性概念，减少由锚节点共线引起的定位误差；接着通过自适应选取教学因子，并且引入学员自学习策略，以加快TLBO算法的收敛速度，增强局部检测能力；将Levy飞行行为融入到TLBO中，增强种群多样性，避免TLBO算法陷入局部最优，计算出精确的定位坐标。仿真结果表明：与...
提出一种基于RSSI测距的改进DV-Hop定位算法，根据RSSI测距优化节点间的跳数，并使用校正因子修正DV-Hop算法中的平均跳距，最后，采用无约束优化算法代替传统的最小二乘法，计算未知节点的坐标，以减小误差的累计。仿真结果表明：与同类型的算法相比，提出的算法定位误差更小，能够得到更加精确的定位结果。
Worst cases for an one-hop high frequency link
ionosphere radio propagation worst cases ray-tracing
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2015/9/25
The characterisation of a HF channel by means of monthly electron density profiles can be complemented with a detailed study of radio propagation «worst cases» on situations with extremes co...
Effective Capacity of Two-Hop Wireless Communication Systems
Two-hop wireless links fading channels effective capacity quality of service (QoS) constraints buffer violation probability
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2011/9/16
Abstract: A two-hop wireless communication link in which a source sends data to a destination with the aid of an intermediate relay node is studied. It is assumed that there is no direct link between ...
Stochastic Sensor Scheduling for Energy Constrained Estimation in Multi-Hop Wireless Sensor Networks
Wireless Sensor Networks Optimization State Estimation
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2011/8/31
Abstract: Wireless Sensor Networks (WSNs) enable a wealth of new applications where remote estimation is essential. Individual sensors simultaneously sense a dynamic process and transmit measured info...
Delay-Aware Cross-Layer Design for Network Utility Maximization in Multi-hop Networks
Delay-Aware Cross-Layer Network Utility Maximization Multi-hop Networks
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2011/1/19
We investigate the problem of designing delay-aware joint flow control, routing, and scheduling algorithms in general multi-hop networks for maximizing network utilization. Since
the end-to-end delay...
Delay-Guaranteed Cross-Layer Scheduling in Multi-Hop Wireless Networks
Delay-Guaranteed Cross-Layer Scheduling Multi-Hop Wireless Networks
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2010/12/13
In this paper, we propose a cross-layer scheduling algorithm that achieves a throughput “ǫ-close” to the optimal throughput in multi-hop wireless networks with a tradeoff of
O( 1 ǫ ) in del...
On the Effective Capacity of Two-Hop Communication Systems
Effective Capacity Two-Hop Communication Systems
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2010/12/15
In this paper, two-hop communication between a source and a destination with the aid of an intermediate relay node is considered.
Japanese hip-hop: from 50 Cent to mirror balls and world peace（图）
anthropologist world peace
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2007/3/12
March 7, 2007，Six months of hanging out in smoky, grungy "genbas," or Japanese hip-hop clubs, gave cultural anthropologist Ian Condry insight into how American rap music and attitudes were being trans...