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According to target system of engineering project, the definition of construction reliability of engineering project was proposed that was the ability of safely getting required project quality under restrictive conditions of time and cost in process of engineering construction. In the light of compositionality and hierarchy of construction system, pyramid model was built and based on BDD algorithm,...
With the recent introduction of Spot Instances in the Amazon Elastic Compute Cloud (EC2), users can bid for resources and thus control the balance of reliability versus monetary costs. A critical challenge is to determine bid prices that minimize monetary costs for a user while meeting Service Level Agreement (SLA) constraints (for example, sufficient resource availability to complete a computation...
In this paper, the fault results and maintenance decision-making chart of existing buildings were discussed, which include three fault results, the maintenance work types, and the logic decision chart; the maintenance decision-making models of existing buildings was established, which include three fault results models, and the optimal objective decision function of maintenance system for existing...
In this work, we study the NP-hard problem of finding the path of maximum reliability between two end nodes in mesh networks against simultaneous failures of multiple links. The links belong to shared risk link groups (SRLGs) that have arbitrary failure probabilities. We propose a novel algorithm to find the optimal path with semi-polynomial running time and prove its correctness.
Based on dynamic berth allocation problem (BAP) in container terminal (CT), a schedule reliability problem (SRP) optimization model is proposed. The model focuses on the minimum average schedule missed hours of ships between the ship schedule departure time and the actual departure time to enhance the schedule reliability (SR) of ships in CT, and the quay crane allocation is considered in this model...
In wireless sensor networks due to its strict resource constraints (with a lower energy, weak processing power), routing protocols should be simple and efficient as the goal, to maximize the extension of the life cycle of the entire wireless network. This paper presents a cross-layer optimization algorithm with the integration of MAC layer and routing layer to meet the requirements of energy-efficiency...
Nuclear power constitutes one of the main electricity production sources in several countries, e.g. in Sweden, with about half of today's electricity production. Driving forces for cost-efficiency have pushed the development of new methods for maintenance planning and optimization forward. Reliability Centered Asset Management (RCAM) is one of these new approaches, and maintenance optimization is...
Microgrids are defined as an area of network that is capable of operating autonomously from the rest of the electricity system. They achieve this by containing enough energy resources to meet all incorporated electrical (and thermal) loads, and by coordinating control in order to meet the participants' aims, and afford adequate quality/reliability of power and heat supply. From an economic point-of-view,...
State-of-the art constrained multiobjective optimisation methods are often explored and demonstrated with the help of function optimisation problems from these accounts. It is sometimes hard for practitioners to extract good approaches for practical problems. In this paper we apply an evolutionary algorithm to a factual problem with realistic constraints and compare the effects of different operators...
Reliability of the Fuzzy Association Rules (FARs) extraction is a challenging research in knowledge discovery and data mining. Reliability refers to the trade-off between the prediction accuracy and the rules diversity. In this paper, an approach called Diverse Fuzzy Rule Base (DFRB) is proposed to extract the FARs which are used later to predict the future values. This approach also aims to ensure...
We present a value-driven approach capable of determining the global optimization objective of service composition to satisfy high-level value expectations. In traditional service composition methods, global and local QoS requirements and constraints are directly raised by customers, then a set of service components (web services) are selected to achieve the optimized QoS. Yet in practice, there is...
Service modeling and composition is a fundamental method for offering advanced functionality by combining a set of primitive services provided by the system. Unlike in the case of web services for which there is an abundance of reliable resources, in sensor networks, the resources are constrained and communication among nodes is error-prone and unreliable. Such a dynamic environment requires a continuous...
This paper focuses on systems development issues (i.e., improvement, extension) for composite (modular) systems. First, systems approaches are considered: (a) improvement of systems components and/or their interconnections, (b) improvement/extension of a system structure, (c) “space” (e.g., geographical) extension of a system as designing an additional system part, and (d) combined system improvement/extension...
The article addresses combinatorial evolution of communication protocol for wireless sensor networks. Morphological tree structure (a version of and-or tree) is used as a hierarchical model for protocols. Three generations of protocol (ZigBee) are examined. A set of protocol change operations are generated and described. The change operations are used as items for forecasting based on combinatorial...
Presently, most maintenance decisions are mainly based on failure event. Nevertheless, in many cases and for many types of equipment this event can rarely be seen or can happen after many years of utilization. In these cases, maintenance decisions are based on fault diagnostics. This paper presents an artificial intelligent approach to fault detection and diagnosis. This approach is called Logical...
Supply Chain Management (SCM) is now an important strategy for companies to gain competitiveness. However, the cost is still the key factor to face. This paper proposes a novel approach to create an optimal logistic plan in SCM with failures such that the required total capacity for logistics is minimum while the reliability retains the highest. Since the globalized economics changes very fast, the...
This paper analyzes the actuality in mobile Agent communication reliability firstly, then it introduces a communication efficiency optimized model LCEOM. Based on the model this paper proposes a new optimized mobile agent communication model ICM. The new model is divided into 6 layers: description layer, analysis layer, layout layer, packaging layer, transport layer and confirmation layer. After introducing...
In this paper, a study of the behavior of wireless mesh networks is proposed, by considering energy consumption and reliability of the network. The real consumption with different network topologies and different data profiles will be analized. The objective of this work is to establish the framework to carry out energy optimizations in order to reduce the energy consumption without losing the reliability...
The requirements of the electronic equipment in high-quality, high reliability and easy maintenance are more and more high, and, the request of the detection technology is increasingly strict, but, with the restriction of the detection capability and detection range, the single detection technology can not meet the above requirements. In order to solve those problems, the purpose of this paper is...
In this paper, the authors propose an algorithm using branch and bound method to search an optimal replacement scheduling of obsolete equipment in aged primary substations. The developed tool can efficiently find an optimal solution from huge combinations of replacement schedules. The objective function to be minimized is the net present value of the sum of operation and maintenance cost, replacement...
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