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In the future intelligent transport systems (ITS) the reliability and precision of the cooperative and autonomous vehicles are of the utmost importance. For such systems vehicle-to-vehicle and vehicle-to-infrastructure (V2X) communications is safety-critical component of ITS. Many mobility and convenience applications of ITS require the V2X bidirectional communications mode. This paper focuses on...
Current methods to compare measurement series are based on the comparison of multiple measurement points or fit parameters. These approaches depend on the quality of the fit and are prone to type I error accumulation, when standard statistical tests are used for evaluation. In this work, we present an approach based on a two-sample Kolmogorov-Smirnov test of residuals of data series to a fit in order...
The reliability aspect study of Modular Multilevel Converter (MMC) is of great interest in industry applications, such as offshore wind. Lifetime prediction of key components is an important tool to design MMC with fulfilled reliability specifications. While many efforts have been made to the lifetime prediction of IGBT modules in renewable energy applications by considering long-term varying operation...
Power cycling in semiconductor modules contributes to repetitive thermal-mechanical stresses, which in return accumulate as fatigue on the devices, and challenge the lifetime. Typically, lifetime models are expressed in number-of-cycles, within which the device can operate without failures under predefined conditions. In these lifetime models, thermal stresses (e.g., junction temperature variations)...
Due to the continuous demands for highly reliable and cost-effective power conversion, the quantified reliability performances of the power electronics converter are becoming emerging needs. The existing reliability modelling approaches for the power electronics converter mainly focuses on the predictions of lifetime, accumulated damage, constant failure rate or Mean-Time-To-Failure (MTTF), while...
In the context of connected industries mobility and flexibility are becoming increasingly important. Accordingly, the use of cascaded communication networks consisting of wired and wireless subnetworks is of interest to support these features. However, by cascading different subnetworks, additional occurring latencies negatively influence the real-time behavior of the overall communication. These...
In this paper, the problem of developing a model for signal control system with transit priority using Colored Petri Nets (CPNs) is considered. In a regular four phases signal lights control model, transit detection and two kinds of transit priority strategies are integrated to obtain Colored Petri Nets based transit priority signal control model. The resulting model ensures that transit can pass...
Determining the reliability of the power supplies for induction heating through an analysis of the states is linked to several aspects of their operation. One of them is the transition between states — from an operating state into a protection state or from a protection state into a failure sate. To do that analysis, an Analysis of the Probabilistic States, the so called Markov Analysis, is used....
This paper proposes a mathematical maintenance model that analyses the effect of maintenance on the survival probability of medical equipment based on maintenance history and age of the equipment. The proposed model is simulated in Scilab using real data extracted from maintenance history of Anaesthesia Machine from Draeger. The analysis using survival approach reveals that conducting preventive maintenance...
Broadcast is one of the fundamental primitives to enable sensor networks. In this paper, we address some practical concerns regarding reliable broadcast. Particularly, we consider the following issues: • Hybrid fault model: We prove the tight necessary and sufficient condition for using Certified Propagation Algorithm (CPA) to achieve reliable broadcast in directed networks under hybrid fault model...
Machine learning has become one of the go-to methods for solving problems in the field of networking. This development is driven by data availability in large-scale networks and the commodification of machine learning frameworks. While this makes it easier for researchers to implement and deploy machine learning solutions on networks quickly, there are a number of vital factors to account for when...
Modern software systems provide many configuration options which significantly influence their non-functional properties. To understand and predict the effect of configuration options, several sampling and learning strategies have been proposed, albeit often with significant cost to cover the highly dimensional configuration space. Recently, transfer learning has been applied to reduce the effort...
The need for performance has motivated the increasing adoption of solid-state drives (SSD) both in personal computers and data centers. However, the high cost per gigabyte and reduced lifetime hinder the thorough replacement of hard disk drives (HDD) with SSDs. To mitigate these issues, several architectures have been conceived based on hybrid storage systems, but performance and dependability models...
Due to its lots of advantages, CT20 type spring operating mechanism is widely used in the 126kV high voltage circuit breaker. This type mechanism should not meet the requirement of higher interrupting capacity circuit breaker while the interrupting capacity is increasing. In this situation, sometimes the vibration of the closing latch during closing may cause the closing process failed if there is...
Reliability is defined as the repeatability of measurements or the consistency of repeated measurements. The most common type of reliability in medical research is the rater reliability. When the measurements are continuous, intra-class correlation coefficient (ICC) is used to evaluate the inter-rater reliability. There are different formulas for calculating the ICC which depend on the purpose of...
A hybrid Petri nets model for the optimal control of mine drainage systems is presented. This model uses continuous Petri nets to describe and analyze continuous variables of mine drainage systems, and uses controlled Petri nets to allow feedback control and time delay Petri nets to assess the performance of mine drainage systems. This model redefines the fire velocities and the fire rules of the...
The paper deals with the problem of synthesis and analysis for procedures of reliability parameters estimation in case of radioelectronic devices technical state deterioration. The synthesis problem was solved on the basis of the maximum likelihood method. The analysis problem was solved using analytical calculations and based on statistical simulation.
Opportunities to develop commercial microgrids are emerging, but investors need analytical tools to assess the economics of microgrid business cases. A large part of the business case for microgrids in the real world is reliability based; yet in academic literature most tools analyze economics based on energy sales to customers or the macro grid. This work offers a new model, based on Monte Carlo...
The proliferation and popularity of online programming forums raises the question of what affects and how do those factors affect the users' level of trust towards the knowledge that is contained within online programming forums. This study uses elements of existing studies that examine trust in online communities, using “community dimensions” of shared consciousness, shared tradition, and obligation...
In this study three-dimensional finite analysis models of 3D micro-scale chip scale package (CSP) solder joints were set up. The stress-strain distribution of micro-scale CSP solder joints was obtained by finite element analysis under the condition of random vibration load. The influence of different solder, pad diameter and solder joint volume on the stress-strain of micro-scale CSP solder joint...
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