To improve the cognitive radio user's detection performance and reduce the complexity, this paper composites the Fractal box dimension algorithm and the 3th-order cyclic-cumulate (TCC) algorithm and improves the T...
详细信息
The problem of recovering sparse and low-rank matrices from a given matrix captures many applications. However, this recovery problem is NP-hard and thus not tractable in general. Recently, it has been shown that this...
详细信息
Since radio communication can not work well underwater, there are still many difficulties and challenges for localization technology of underwater wirelesssensornetworks (UWSN). In order to improve the localization ...
详细信息
With the continuous development of the converged network, the types of equipment increase and each has different device identification. The existing SNMPv3 program by using enginelD to identify equipment's legal s...
详细信息
Due to the unpredictability of continuous data in distributed applications, it is hard for system to deal with data explosion in limited time. As a result, traditional static data storage technology fails to meet the ...
详细信息
ISBN:
(纸本)9781479913510
Due to the unpredictability of continuous data in distributed applications, it is hard for system to deal with data explosion in limited time. As a result, traditional static data storage technology fails to meet the demands for real-time data processing. To improve processing ability, many parallel processing structures are proposed, which brings up the problem that how the parallel machines can be scheduled to maximize their efficiency. Accordingly, a dynamic assignment scheduling algorithm for stream computing is proposed and a stream query graph is built to calculate the weight of every edge. The edge with the minimum weight is selected to send tuples. Simulation results show that the proper number of the logic machines could dramatically reduce system response time. Furthermore, system context switching is reduced by increasing the number of tuples sent every time.
In order to ensure the reliability and security of working environments under the open network environment dynamically,a fine-grain real-time and dynamic trust monitoring model is proposed which is based on behavior a...
详细信息
Heterogeneous wirelesssensornetwork (HWSN) consists of sensor nodes with different ability, such as computing power and sensing range. Compared with homogeneous wirelesssensornetwork, the design of protocols for s...
详细信息
ISBN:
(纸本)9781479928521
Heterogeneous wirelesssensornetwork (HWSN) consists of sensor nodes with different ability, such as computing power and sensing range. Compared with homogeneous wirelesssensornetwork, the design of protocols for such networks has to be more complex due to the energy constraint in order to prolong the lifetime of the network. As energy consumption mostly comes from the radio transmissions, bandwidth utilization affects the network lifetime greatly. In this paper, a novel lossless data aggregation scheme (Better-to-Fit) is presented for the clustering-based HWSN to improve the bandwidth utilization without introducing extra computation. The average performance is evaluated theoretically and validated by simulations. It has been found that the proposed aggregation technique can minimize the aggregation time under energy constraint and achieve promising efficiency in terms of bandwidth utilization.
With the explosive growth of web services, the research on how to rapidly find the desired services becomes increasingly important and challenging. In this paper, we focus on non-semantic web services discovery and pr...
详细信息
This paper investigates the impacts of network coding (NC) on user fairness from the network perspective in multiple access channels. Firstly, simultaneous outage is exploited as the metric to evaluate user fairness...
详细信息
This paper investigates the impacts of network coding (NC) on user fairness from the network perspective in multiple access channels. Firstly, simultaneous outage is exploited as the metric to evaluate user fairness. To optimize it, a fairness-oriented physical layer NC scheme is proposed, in which users' signals are superimposed in specific calculated proportion at relay and then decoded by maximal ratio combination (MRC) and serial interference cancellation (SIC) at destination. Furthermore, the influence of power allocation coefficient error on simultaneous outage is also analyzed to reveal its correlation with user fairness. Simulation results indicate that the proposed scheme can supply approximately equal performance promotion for each cooperation-participated user and outperform those without fairness consideration in terms of the employed metric.
Trust information search algorithm is one of the most important components of P2P trust model. Considering the large number of nodes and the wide range of information each node contains in P2P network, efficient searc...
详细信息
暂无评论