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Historical deterministic practices and standards used to provide security of supply are based on the occurrence of credible N-1 or N-2-type events, and therefore ignore the occurrence of high impact low probability (HILP) events that may present catastrophic consequences on power supply. It has been also reported that deterministic security standards ignore contribution of smart non-network technologies...
This paper proposes a new compressed sensing (CS) measurement matrix optimal algorithms based on singular value decomposition (SVD). New measurement matrix can be obtained by using SVD for the decomposition of Gaussian measurement matrix. Simulation results prove that using the new measurement matrix can not only greatly improve the robustness and stability of CS algorithm, but also have better behaviors...
For the most existing MAODV protocol is only improved by a single performance, there is a problem that the comprehensive performance of the protocol cannot be improved as well. By uses of the routing selection mechanism with the constraints of bandwidth, delay and packet loss rate of the original protocol, a new multi-objective routing protocol RCQ-MAODV of mobile ad hoc network is put forward. Simulations...
We study invulnerability of complex networks subject to attacks on nodes and links. For the purpose of precisely assessing invulnerability of complex networks, in this paper we proposed an invulnerability assessment on the basis of importance-degree and partial attack information by measuring two metrics of network invulnerability, robustness and efficiency. We defined the term of importance-degree...
In this paper, a priority-based bandwidth allocation in the context of heterogeneous wireless network is studied. By utilizing the mobile terminals with multi-homing capability, which simultaneously accesses bandwidth from different wireless network, a novel utility-based bandwidth allocation approach is introduced. An essential factor is the priority mechanism considering the services priority classification,...
Visible light communication (VLC) is regarded as an emerging wireless access technology that has tremendous potential for 5G. However, the link of VLC is vulnerable to blockage of moving objects within the room. Moreover, the link data rate of VLC falls sharply with link distance increasing. Therefore, VLC needs to constitute networks with other wireless technologies, such as WiFi, WiMAX, 2G/3G and...
Based on the characteristics of HBase, data in the table is automatically sorted according to Rowkey, so in the organization of the massive data from community, add a timestamp to the storage structure in order to speed up queries, but HBase region split causes a defect that HBase load imbalance. In view of the above problems, this paper presents the design ideas of pre-partitioning and hash. in advance,...
In this paper, adaptive power allocation (PA) on the source and relay is investigated to maximize energy efficiency (EE) for OFDMA opportunistic DF links (O2RL). We derive EE function from O2RL model by appropriate definition of variables to represent source/relay PA, subcarrier transmission mode selection (STMS) elegantly. Theoretical analysis demonstrates that EE function for O2RL is strictly quasi-concave...
This article consists of a collection of slides from the author's conference presentation. Some of the specific areas/topics discussed include: discrete lens array; beam selection techniques; maximum magnitude selection; capacity maximization selection; signal to interference ratio; system configuration; spectral efficiency; and power efficiency.
Simulation models have been extensively used in manufacturing to enhance the design, planning and decision making processes. However, the tendency has been to use simulation in one-off applications, often at the start of a project and not take account of inherent process changes over time. This has inhibited their contribution as a realtime decision make tool. This paper describes how simulation is...
In this paper we present a dynamic programming based technique that is suitable for providing exact solutions to a subset of optimisation problems, using general purpose GPU computing. The primary feature of this model is to efficiently use the computational and memory resources of the GPU, whilst still remaining abstract enough to allow implementation on a variety of problems. Secondly, as exact...
The use of indoor wireless communication systems is continuously increasing while the main concern is how to provide nonstop high quality service. This requires positioning the base stations in a way that optimise the quality measures such as the path loss in addition to minimising the transmitted power in order to reduce the power consumption as well as the interference with neighbour base stations...
The influence of materials of alloying electrodes on microhardness, thickness and tribotechnical properties of the coats shaped by electro-spark processing on various technological modes are explored. It is secured that with the increase of parameters of energy modes of electro-spark processing the microhardness and the thickness of coat are increasing regardless of an electrode material. Effects...
The present paper investigates the aerodynamic design of wind turbine blades while considering manufacturing constraints. Blade topologies achieved by unconstrained optimisation methods are likely to lose optimality after manufacturing simplifications are applied. The present paper proposes and evaluates the performance of an optimisation method for wind turbine blades while considering manufacturing...
This paper presents the implementation of Just-in-Time (JIT) approach in production systems, which plays a significant role in minimising costs and performances of products and services supplied to the global marketplace. However, there are many potential risks that cause significant disruptions to all supply chain members. In this paper, a genetic algorithm model is developed for simultaneously reducing...
In this work we have developed a technique of the induction machine parameters identification which is based on the simulated annealing optimization which has been improved to achieve an identification algorithm which gives good results in comparison with the identification techniques usually employed. This algorithm has been tested by simulation on a test function and for Induction Machine identification;...
In this article we present a new technique for determining the parameters of induction machine backstepping control that achieve the best performance of this control, while ensuring respect of the physical limits of the induction machine. This technique was designed based on the genetic algorithm optimization technique. The validation of this technique was made by simulation using Matlab, the obtained...
In this paper a novel planning system for coils route optimisation among different processing steps of a generic steelmaking plant will be presented. This new approach, in addition to production times and costs, considers also customers' quality requirements. The system is based on Multi-Objective Optimisation and, in particular, it can exploit different paradigms of Multi-Objective Evolutionary Algorithms...
Indoor tracking of smartphones adds context to smartphone applications, enabling a range of smarter behaviours. The predicted use cases are many and varied, and include navigation, planning, advertising and communication. Potentially, indoor tracking could become as ubiquitous as GPS — however, all of these possibilities depend on being able to produce a reasonably accurate, reliable system which...
Unbalanced three-phase distribution networks are undergoing significant changes with the advent of modern distributed energy resources (DER). These DER come in the form of both load and generation, such as electric vehicles, heat pumps, photovoltaics and micro wind turbines, and have the potential to drastically modify customers' behaviours and needs. Consequently, as distribution networks continue...
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