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Showing 1 to 18 of 18 for “"life estimation"”.
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Food Shelf Life: Estimation and Experimental Design
<p>Shelf life is a parameter of the lifetime distribution of a food product, usually the time until a specified proportion (1-50%) of the product has spoiled according to taste. The data used to estimate shelf life typically come from a planned experiment with sampled food items observed at …
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Prognostic Algorithms for Condition Monitoring and Remaining Useful Life Estimation
… quantify, track and predict the remaining useful life of pumps su�ering from degradation caused by pumping large volumes of corrosive uorine gas. A comprehensive condition monitoring solution for thermal abatement systems is also presented. As part of this work, a multiple model particle �ltering …
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Methodologies for remaining useful life estimation with multiple sensors in rotating machinery
… The simulation framework is based on real life experiments and is applied to assess a number of data-driven Remaining Useful Life (RUL) estimation techniques namely i) Proportional Hazards Μodel (PHM), ii) ε- Support Vector Regression ε-SVR and iii) Exponential extrapolation based on …
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ACCELLERATED SELF-LIFE TESTING OF COFFEE: THE ROLE OF INNOVATIVE FLEXIBLE PACKAGING MATERIALS ON OXIDATION AND SHELF-LIFE ESTIMATION WITH A SIGHT ON THEIR ENVIRONMENTAL SUSTAINABILITY.
… to a decline in aroma, flavour, and shelf life. The development of effective, sustainable, and high-performance packaging solutions requires a multidisciplinary approach that combines material science, analytical techniques, sensory evaluation, and environmental sustainability. This …
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Fatigue Life Estimates for a Notched Member in a Corrosive Environment (Corrosion)
… environment can be included in fatigue life estimation procedures by determining the material properties in the environment of interest. An analytical and experimental program was conducted to investigate this assumption. Automotive grade aluminum alloy 5454-H32 was selected for this …
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Thermomechanical and Vibrational Fatigue Life Assessment of Railway Wheels
… Most research studies in wheel fatigue life estimation did not account for structural, thermal and prestressed random vibrational loading as a coupled field. The present study develops an advanced numerical analysis methodology that incorporates real service conditions to calculate …
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Durability Analysis of Helical Coil Spring in Vehicle Suspension Systems
… roughness. This research focuses on fatigue life analysis of coil spring component. Static linear analysis is conducted on the 3D model of helical coil spring to investigate deformation and stress responses. Modal analysis evaluates the characteristics of vibration, i.e. natural resonance …
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A geometric method of fatigue SCF and fracture SIF assessment
In modern marine structural design, the fatigue life and fracture prediction of local connection details of the vessel is necessary. The traditional empirical rules or numerical work has considerably advanced the qualitative and quantitative understanding of fatigue and fracture analysis. Compared …
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Fretting fatigue Behaviour of Inconel 718 at room and high Temperature
… of temperature and applied loads on the fatigue life of the material. A fractographic analysis of the tested specimens was subsequently conducted using scanning electron microscopy (SEM), which enabled the identification of distinct regions on the fracture surface, as well as the establishment of …
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Physics-Informed Interpretable Attention-based Machine Learning for Jet Turbine Prediction
… for applications such as Remaining Useful Life estimation and accident prognosis, but do not perform prediction on measured state quantities or performance. Additionally, of modeling studies that focus on jet turbines, the data is synthetic instead of experimental. In this thesis, we …
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Observer-Based Simultaneous States and Parameters Estimation Method with Application to System Heath Monitoring
Joint state and parameter estimation is paramount in many engineering and scientific fields, as it involves determining the internal states of a system and the estimation of its time-varying / unknown parameters simultaneously. This twin estimation aspect is crucial for real-time system monitoring, …
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Hot section components life usage analyses for industrial gas turbines
… Efforts are thus being made to estimate the life of the critical components of the gas turbine, but, the accuracy of the life prediction methods employed has been an issue. In view of the above observations, in this research, a platform has been developed to simultaneously examine engine life …
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Einfluß einer Selen-Substitution auf den Verlauf einer Autoimmunthyreoiditis
… ultrasound pattern of the thyroid and quality of life estimation. Patients were randomized into 2 age- and antibody (TPOAb)-matched groups; 36 patients received 200 µg (2.53 µmol) sodium selenite/d, orally, for 3 months, and 34 patients recieved placebo. All patients were substituted with L-T4 to …
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An integrated design process for durable concrete structures at the minimum environmental cost : application with the incorporation of rice husk ash
… also be placed on safeguarding the service life of reinforced concrete structures (in addition to tackling their environmental burden). That is why it is very important to introduce the sustainable way of thinking and the concept of industrial ecology on the preliminary design stages of a …
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Thermo-elastic-plastic analysis for elastic component under high temperature fatigue crack growth rate.
… research programme studied the fatigue stress-life data for three types of surface conditions specimen and the isothermal stress-controlled fatigue testing at 300 °C - 600 °C temperature range. It is observed that the highest strength is obtained for the polished specimen, while the …
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Rapid remaining-useful-life prediction of Li-ion batteries using image-based machine learning
… methodologies to predict the remaining-useful-life (RUL) of lithium-ion batteries reliably, accurately, and swiftly. Firstly, a method that prides itself on being publicly available, and which can be easily implemented alongside existing methodology, is proposed to increase the prediction …
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Stability of Field Emitter Arrays to Oxygen Exposures
The purpose of these experiments was to determine the degradation mechanisms of molybdenum based field emitter arrays to oxygen exposures and to improve the overall reliability. In addition, we also evaluated the emission current stability of gold-coated field emitter arrays to oxygen exposures. …
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Die Übertragbarkeit von Schwingfestigkeitseigenschaften im Örtlichen Konzept
Das Örtliche Konzept dient der Berechnung von Lebensdauern zyklisch belasteter Konstruktionen. Dabei wird die Ermüdungsfestigkeit des ungekerbten Werkstoffes zugrundegelegt, um die Bauteillebensdauer abzuschätzen. Mit dieser Annahme verbunden ist ein starke Vereinfachung des Ermüdungsvorganges. Die …