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Electric bikes (e-bikes) are booming in China, providing a flexible and energy-efficient trip mode for people all around the country. However, the problems such as traffic accidents and disrupting social order caused by e-bikes bring much worry to the government operators. And the behavior of e-bike users also attracts the sociological researchers' interest due to their characteristics (e.g. lower...
In this paper, we study full-view coverage in camera sensor networks, by exploiting their limited mobility of orientation rotation. We focus on the fairness based coverage maximization problem, i.e., how to schedule the orientations of the camera sensors to maximize the minimum accumulated full-view coverage time of target points. To solve this problem, we first try to reduce the space dimension of...
With the quality of service (QoS) of cloud services becoming increasingly concerned, how to ensure that the QoS of cloud services can meet the users' QoS requirement has become a focus of the study on cloud computing. However, the QoS of cloud services is dynamic regularly, we propose a QoS guarantee framework for cloud services and the Bayesian prediction method is used to predict QoS of cloud service...
In large parking lots, it is generally difficult for drivers to know ahead of time whether there will be available parking spots and where they are. Besides, it is logistically cumbersome to wait in line for paying parking fees when leaving. In this demo, we develop an intelligent parking system called iParking. iParking could help users monitor parking states, search for a vacant parking spot, reserve...
Barrier coverage in sensor networks has attracted much attention in recent years. Existing results revealed that sensor mobility can remarkably improve the coverage performance of sensor networks. Considering the high manufacture cost of mobile sensors, in this paper we propose to tradeoff the barrier coverage performance and deployment budget by employing a wireless sensor and actor network (WSAN),...
We consider the problem of event capture by a rechargeable sensor network. We assume that the events of interest follow a renewal process whose event inter-arrival times are drawn from a general probability distribution, and that a stochastic recharge process is used to provide energy for the sensors' operation. Dynamics of the event and recharge processes make the optimal sensor activation problem...
Barrier coverage problem in emerging mobile sensor networks has been an interesting research issue. Existing solutions to this problem aim to decide one-time movement for individual sensors to construct as many barriers as possible, which may not work well when there are no sufficient sensors to form a single barrier. In this paper, we try to achieve barrier coverage in sensor scarcity case by dynamic...
Recently, wireless recharging technologies have merged as a promising approach to address the energy constraint problem in Wireless Sensor Networks (WSNs). Far from other energy-harvesting sensor nodes, wireless rechargeable sensor nodes are thin small-size, enabling a large range of applications such as embedded infrastructure sensing and human activity recognition. A typical Wireless Rechargeable...
A mobile sensor is used to cover a number of points of interest (PoIs) where dynamic events appear and disappear according to given random processes. It has been shown in that for Step and Exponential utility functions, the quality of monitoring (QoM), i.e., the fraction of information captured about all events, increases as the speed of the sensor increases. This work, however, does not consider...
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