Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"Lifetime Data"”.
-
Generalized Modified Weibull Poisson Distribution with Applications to Lifetime Data
… of the new distribution. Finally, a real data example is discussed to illustrate the usefulness and applicability of the distribution.</p>
-
Generalized Classes of Lindley Distributions With Applications to Lifetime data
… the new classes of distributions. Finally, real data examples are discussed to illustrate the applicability of the classes of distributions.</p>
-
The Generalized Lindley-Weibull Distribution with Applications to Lifetime Data
… Lindley-Weibull distribution for modeling lifetime data is proposed. This model further generalizes the Lindley distribution and allows for hazard rate functions that are monotonically decreasing, monotonically increasing bathtub and upside down bathtub shaped. The model provides a better …
-
Generalized Classes of Distributions with Applications to Income and Lifetime Data
… Kumaraswamy-Dagum distribution for censored data is constructed. Real data examples are presented to illustrate the usefulness and applicability of these proposed classes of distributions.</p>
-
Two New Classes of Generalized Modified Weibull Distributions with Application to Lifetime Data
… its extended families has been widely studied in lifetime applications. Based on the Weibull-G family of distributions and the exponentiated Weibull distribution, we study in detail two new classes of distributions, namely, Gamma-Weibull-G family of distributions (GWG) and gamma-exponentiated or …
-
Bridging the Gap: Selected Problems in Model Specification, Estimation, and Optimal Design from Reliability and Lifetime Data Analysis
Understanding the lifetime behavior of their products is crucial to the success of any company in the manufacturing and engineering industries. Statistical methods for lifetime data are a key component to achieving this level of understanding. Sometimes a statistical procedure must be updated to be …
-
Statistical Methods for Improving and Maintaining Product Reliability
… used, practitioners can understand better what lifetimes to expect of a product under different operating conditions and what factors are important to designing reliability into a product. Reliability experiments, however, can be very challenging to analyze because often the reliability or …
-
Radiative and predissociative lifetimes of the A²Σ⁺ state of OH
<p>"Lifetime measurements have been made on the A²Σ⁺ state of OH by the delayed coincidence technique in conjunction with an interrupted rf discharge through water vapor. Lifetimes are reported for rotational states up to K = 29 and K = 20 in the v = 0 and v = 1 vibrational levels respectively and …
-
Cumulative Sum Control Charts for Censored Reliability Data
… products until the units fail. Most often, the data are censored according to different censoring schemes, depending on the particulars of the test. On occasion, tests are stopped at a predetermined time and the units that are yet to fail are suspended. In other instances, the data are collected …
-
Phosphorescence of a Series of Substituted Aceto- and Benzophenones in Crystalline form at Room Temperature
… study was initiated in order to obtain uniform data on the o-o triplet energies of a series of benzo- and acetophenones under study as sensitizers in the photochemical cycloaddition of isophorone to 1,1-dimethoxyethylene. | A recording emission spectrograph with lifetime measuring capabilities …
-
Statistical Methods for Reliability Data from Designed Experiments
… implications that experimental protocol have on data analysis. Additionally, statisticians who focus on DOE rarely work with reliability data. As a result, analysis methods for lifetime data for experimental designs that are more complex than a completely randomized design are extremely limited. …
-
Knowledge Discovery from Complex Event Time Data with Covariates
… as reliability engineering, complex types of data are encountered which require novel methods of statistical analysis. Handling covariates properly while managing the missing values is a challenging task. These type of issues happen frequently in reliability data analysis. Specifically, …
-
A Study of Mathematical Modeling of Remaining Useful Life, Assessment, and Prognostics & Health Management (PHM)
… methods of RUL modeling and assessment: lifetime data analysis and degradation based analysis. Traditionally, reliability estimation has been based on analysis of time-to-failure data of a device/system. However, the increase in production of highly reliable devices has led to decrease in …
-
Lifetime Testing of Wire-Grid Polarizers with Selected Over-Coatings
… Over-coating a WGP has been found to increase lifetime and durability. This research provides lifetime data on coated and uncoated WGPs. WGPs over-coated with 100nm of SiO2, 300nm of MgF2, and with no over-coating were heated to temperatures of 450 ºC, 500 ºC, and 550 ºC and timed until they …
-
Multi Scale Fluorescence Studies: The Spinning Disk Confocal Fluorescence Lifetime Imaging Microscopy &Amp; Single Molecule Nano-Metronome &Amp; Single Molecule Study of Tetramethyrhodamine-Dna Interaction
… part involves the frequency domain fluorescence lifetime imaging microscopy (FLIM) and an improvement of FLIM setup to decrease the out of focus background fluorescence without drastically sacrificing the data acquisition speed while taking fluorescence lifetime data. The setup incorporates a …
-
Molecular Solvation in Phosphonium Ionic Liquids
… fluorescence spectroscopy. The C153 steady-state data shows a systematic blue shift as PIL-Cl is added to solution. The system is at net higher energy at high mol fraction PIL-Cl implying that C153/PIL-Cl interactions are less favorable compared to C153/MeOH. The solute emission intensity is …
-
Monte Carlo studies of ground-state & optical properties of multiexcitonic complexes in semiconductors
… and with experimental binding energy and lifetime data from various direct-gap semiconductors. We then study the ground-state properties of polyexcitons, freely moving complexes of two, three, and four electron-hole pairs in indirect-gap semiconductors, calculating binding energies and …
-
Advancements on the Interface of Computer Experiments and Survival Analysis
… experiments is an area focusing on efficient data collection (e.g., space-filling designs), surrogate modeling (e.g., Gaussian process models), and uncertainty quantification. Survival analysis focuses on modeling the period of time until a certain event happens. Data collection, prediction, …
-
Excited state proton transfer in 2-substituted benzothiazoles
… a rise in both fluorescence quantum yield and lifetime is observed as the temperature is decreased. It is proposed that a viscosity dependent non-radiative process leading to a nonemissive, twisted excited state accounts for these observations. Application of quantum chemical calculations to …
-
Analysis of Reliability Experiments with Random Blocks and Subsampling
… product life. Current analyses of reliability data usually assume a completely randomized design. However, reliability experiments frequently contain subsampling which is a restriction on randomization. A typical experiment involves applying treatments to test stands, with several items placed …
Page 1 of 2