Maintenance strategy decision for avionics system based on cognitive uncertainty information processing. eksploatacja i niezawodnosc - Maintenance and Reliability 2015; 17 (2): 297-305, http://dx.doi.org/10.17531/ein.2015.2.18. Jiliang Tu Chengli Sun Xiangyang ZhAng hongliang PAn Ruofa ChengMaintenance strategy decision for avionics systeM based on cognitive uncertainty inforMation processing decyzja w zakresie strategii utrzyMania ruchu układu elektroniki lotniczej w oparciu o przetwarzanie inforMacji związanych z niepewnością kognitywną only by pilot error. In that sense, the importance of maintenance activity has increased due to its key role on improving system availability, performance efficiency, safety and reliability, etc. Thus in order to improve avionics considerations in general, maintenance managers (MM) should take decisions about the maintenance strategies to be implemented as well as the necessary resources to satisfy avionics system performances and requirements. Proper maintenance schedule is required to improve avionics systems reliability and safety. A decision approach to maintenance strategy remains a longstanding challenge in avionics system. With regard to fault diagnosis and equipment maintenance of avionics system, in which the equipment fault information are complex and uncertainty, a multi criteria of decision making method for avionics system based on cognitive uncertainty information processing is proposed to be used in the maintenance strategy decision. Firstly, vague set with three-parameters is introduced to make up for the shortage of the original vague set in expressing fuzzy information, a linguistic variables describing the qualitative indexes into three parameter vague of interval number is proposed. At the same time, due to risk psychological factors of maintenance policymakers that cause cognitive uncertainty are introduced into the maintenance decision process, and a prospect value function of three parameters vague interval value is defined based on prospect theory and the formula for measuring the distance between vague interval value, and a non-linear model of equipment maintenance policies can be established. The implementing process of maintenance policy decision for avionics system based on cognitive uncertainty information processing is given in this paper, and a ranking of the maintenance alternatives is determined. Finally, A specific example of decision of maintenance strategies in avionics system with the application of the proposed method isSatisfactory performance of an aircraft depends up on the continued reliability, security, features enhancements of avionics system. Reliability is proportional to amount of maintenance received and knowledge of men who performed such maintenance [13,17]. Now, an avionics system may comprise a large number of components, and efficient maintenance strategy is required to improve the reliability of relevant functions and to reduce high maintenance cost. For a long time, both home and abroad have to take preventive tests and...
A two-step deformation approach is proposed for the superplastic deformation (SPD) of Mg-9Li-1Al (LA91) alloy. This method has been successfully applied to titanium alloys and has induced enhanced superplasticity, and the feasibility of the method for the Mg-Li based alloy is explored. In a previous research, single-step SPD of LA91 alloy has been investigated, and the highest elongation of 563.7% was obtained by using the 8-pass equal channel angular extruded material, by the maximum strain rate sensitivity (Maxm) mode deformation. While in this research, the raw material in the as-extruded state is utilized. Constant velocity (Constv) and constant strain rate (CSR) modes are adopted for the first step of the deformation, respectively, with the elongation of the first step from 50% to 150%. The Maxm mode, in which the strain rate sensitivity m is always kept to be the maximum value, is applied to the second step. In addition, single-step tests by Constv, CSR and Maxm modes until fracture are conducted. The experimental temperature is 300°C, which was proved to be the optimum temperature for the SPD of this material in the previous research. The result shows that the 2-step method can greatly improve the superplasticity of the LA91 alloy, especially for the CSR mode deformation, and the maximum elongation obtained is 535.3%, by the CSR-Maxm mode, which is comparable to the optimum result in the previous research.
Investment decisions are made by individuals who are subject to behavioral biases. The biases could lead to a significant impact on the outcome of investments. This research paper aims to investigate the role of behavioral biases in investment decisions and outcome. The study draws on the theories of Rational Behavioral Finance, which recognizes that human behavior is influenced by both rational and irrational factors. The paper reviews several key behavioral biases that can affect investment decisions, including loss aversion, endowment bias, framing, overconfidence, and the illusion of control. The analysis of these biases is based on the context of different investment settings, including stock markets, mutual funds, and real estate. The paper introduces the significance of each bias, and how they can lead to suboptimal investment decisions. The latter part of the paper highlights how the biases can be addressed to improve the outcome of investments. Eventually, the research paper concludes that behavioral biases can significantly impact investment outcomes, but the application of Rational Behavioral Finance theories and strategies can mitigate the impact of these biases.
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