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Reasonable maintenance strategy can decrease power grid operation costs and enhance competitiveness of power grid. Therefore, according to the principle of system condition-based maintenance, an equipment imperfect maintenance model is built based on a modified Kijima II model, which considers electrical equipments' maintenance outage model and repair outage model and the effects of equipment maintenance...
The integrated avionics system is a platform that integrates a series of flexible, reusable, interoperable hardware and software resources. It enables to implement the decoupled isolation of task software and physical resources under the premise of versatility of hardware resources and configuration of system applications, which can meet the requirements of software system updates and task changes...
It is a challenge to ensure data integrity for cloud-based Internet of Things (IoT) applications because of the inherently dynamic nature of IoT data. The available frameworks of data integrity verification with public auditability cannot avoid the Third Party Auditors (TPAs). However, in a dynamic environment, such as the IoT, the reliability of the TPA-based frameworks is far from being satisfactory...
Determining the time interval for preventive maintenance is one of the most important duties in programming maintenance guides. The purpose of planning the time interval is to keep and restore the reliability of equipment, which means selecting the suitable interval to avoid failures before they occur. Existing methods of determining a fixed-time interval always ignore influences such as cumulative...
The OpenFlow paradigm embraces third-party development efforts, and therefore suffers from potential attacks that usurp the excessive privileges of control plane applications (apps). Such privilege abuse could lead to various attacks impacting the entire administrative domain. In this paper, we present SDNShield, a permission control system that helps network administrators to express and enforce...
The fast path, as the cache of exact-match rules in the slow path, is applied in software-based OpenFlow switches to improve the forwarding performance. A microflow in the fast path is the specification of its corresponding rules in the slow path, i.e., every field is explicit in a microflow. A rule can generate multiple microflows in the fast path, and a microflow can be generated from multiple rules...
In this paper, a Bayesian dynamic model is proposed to evaluate the sensor nodes' credibilities online, in a paradigm of agricultural Internet of things (IoT). The purpose is to discriminate reliable and unreliable data items before further data analysis, and thus to implement reliable data analysis. The credibility of the sensor node of interest is treated as the state variable of the model. The...
Wireless Body Area Networks (WBAN) is a promising type of networks that mainly targets at applications in ubiquitous communication and e-Health services. To support long-term pervasive services, both reliability and energy efficiency are required in WBAN communications. In this paper, by adopting compressive sensing (CS) technology, a reliable transmission strategy for WBANs is proposed to alleviate...
To support long-term pervasive healthcare services, communications in Wireless Body Area Networks (WBANs) need to be both reliable and energy-efficient. As a cooperative transmission method, relay transmission scheme works effectively in resisting shadowing effect and improving reliability in WBANs. However, the extra energy consumption introduced by relay transmission is very high, which can shorten...
Wireless Body Area Network (WBAN) is a promising type of networks that mainly targets at applications in ubiquitous communication and e-Health services. Different from other types of networks, one important challenge for WBAN is that its quality of service (QoS) requirement, in terms of delivery probability and data rate, will be time varying since human body is a highly dynamic physical environment...
In this paper, we present a Spy Positive and Unlabeled Learning (SPUL) classifier. It is a novel two-step strategy of implementing a positive-and-unlabeled-sample-based classifier. In the first step, by using spy detection, the unlabeled samples are divided into unreliable positive and reliable negative samples. In the second step, the classifier is built using labeled positive, unreliable positive,...
Energy efficient communication is a key requirement of energy-constrained underwater sensor networks (UWSNs). In this paper, we show that the cooperative diversity, which is conventionally utilized to improve reliability in UWSNs, can be employed to reduce energy consumption and preserve a reasonable level of data reliability and communication delay. We first elucidate in what circumstances the cooperative...
Underwater communication is a challenging topic due to its singular channel characteristics. Most protocols used in terrestrial wireless communication can not be directly applied in the underwater world. In this paper, we focus on the issue of energy efficient transmission in underwater sensor networks (UWSNs) and analyze this problem in a rigorous and theoretical way. We formalize an optimization...
High reliability and real-time performance is a must in the industrial control networks. This article discussed both advantages and disadvantages of traditional fieldbus, then the open standard Ethernet technology was introduced. By discussing the disadvantage of applying commercial Ethernet to industrial control networks, this article analyzed two methods to improve the reliability and real-time...
This paper proposes an optimization method for planning adequate number and location of feeder switches in a loop controlled distribution feeder. The purpose is to minimize the total costs on precondition of the service reliability indices to achieve the required level. First, a network equivalent technique is introduced to reduce the calculating burden in the reliability indices and outage costs...
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