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.
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Showing 1 to 17 of 17 for “"Sequential probability ratio test"”.
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Sharpening the Boundaries of the Sequential Probability Ratio Test
… thesis, we present an introduction to Wald’s Sequential Probability Ratio Test (SPRT) for binary outcomes. Previous researchers have investigated ways to modify the stopping boundaries that reduce the expected sample size for the test. In this research, we investigate ways to further improve …
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Applications of sequential hypothesis testing to the development of non-invasive brain-computer interfaces
Sequential hypothesis testing is applied in this thesis to make two contributions to the classification of electroencephalography (EEG) data for use in non-invasive brain computer interfaces (BCIs). The first contribution is a variable window-length classification method for use in a steady-state …
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Monitoring unknown source IP addresses and packet sizes to detect DDoS attacks
… as a xed sample size binary hypothesis testing. The decision making is based on the Neyman-Pearson criteria. The second parametric model is a sequential probability ratio test where the sample size is a random variable. Acceptance and rejection boundaries are deduced based on Wald's …
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Sequential analysis of categorical data
… of the non-centralχ² distribution and Wald's sequential probability ratio test, procedures have been developed for sequential analysis of categorical data group-wise. These procedures' enables (i) a simple hypothesis to be used for the alternative hypothesis instead of the composite hypothesis …
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Enhancing Attack Resilience in Cognitive Radio Networks
… dynamic spectrum access networks or NeXt Generation (XG) communication networks---are envisioned to provide high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques. In recent years, the operational aspects of CR networks have attracted …
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New Methods for the Detection and Interception of Unknown, Frequency-Hopped Waveforms
… detection method based on the likelihood ratio to a sequential one based on the Sequential Probability Ratio Test (SPRT). The second method is structured around a compressive receiver and is highly efficient yet easily implemented. The third method is based on the new concept of Amplitude …
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Control charts applying a sequential test at fixed sampling intervals with optional sampling at fixed times
… A control chart is proposed which applies a sequential probability ratio test (SPRT) at fixed sampling intervals, the SPRT chart, to monitor the mean of a process with a normal distribution. A natural modification of the SPRT chart, the SPRT chart with sampling at fired times (SFT), is also …
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Variable dwell time verification strategies for CDMA acquisition with application to GPS signals
… of the synchronisation parameters. The optimal sequential probability ratio test, which has largely been ignored for the GPS problem, is shown to outperform the computationally simple single dwell detector, even in the presence of adverse signal effects. A new approximation for the distribution …
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Egg mass sampling plans for gypsy moth management programs
… density categories for making control decisions. Sequential egg mass sampling plans for gypsy moth management programs in urban and suburban habitats were developed from 0.01 ha fixed-radius plot samples collected in Loudoun, Fairfax, and Arlington Counties, Virginia. The sampling plans were …
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Comparison of four stopping rules in computerized adaptive testing and examination of their application to on-the-fly multistage testing
Computerized adaptive testing (CAT) is a powerful and efficient approach in educational testing for both estimating ability and classifying examinees into groups. When the purpose is to classify students as either proficient or not proficient in ability, an accurate estimate is not necessary, and …
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Statistical Hypothesis Testing Under Model Uncertainty
Statistical testing is one of the main problems in statistics and finds applications in a number of fields, including engineering, signal processing, medicine, and finance among others. Traditionally in hypothesis testing problem, the hypothesis distributions subject to testing are known. However, …
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Universal outlier hypothesis testing with applications to anomaly detection
Outlier hypothesis testing is studied in a universal setting. Multiple sequences of observations are collected, a small subset (possibly empty) of which are outliers. A sequence is considered an outlier if the observations in that sequence are distributed according to an “outlier” distribution, …
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SEQUENTIAL METHODS FOR NON-PARAMETRIC HYPOTHESIS TESTING
… is to develop such algorithms for two-sided sequential binary hypothesis testing.</p> <p>In this dissertation, we propose two algorithms for sequential non-parametric hypothesis testing. The proposed algorithms are based on the random distortion testing (RDT) framework. The RDT framework …
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Adaptation in Reputation Management Systems for Ad hoc Networks
… networking model that depends on node cooperation for key network functionalities such as routing and medium access. The significance of node cooperation in ad hoc networks makes network survival particularly sensitive to insider node behavior. The presence of selfish or malicious nodes in …
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Adaptive Estimation and Detection Techniques with Applications
… is developed based on the VSMM. It can handle sequential failures and multiple failures by sensors or actuators. Fault detection and target maneuver detection can be formulated as change-point detection problems in statistics. It is of great importance to have the quickest detection of such …
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Advanced functional and sequential statistical time series methods for damage diagnosis in mechanical structures
… 30 years have witnessed major developments in vibration based damage detection and identification, also collectively referred to as damage diagnosis. Moreover, the past 10 years have seen a rapid increase in the amount of research related to Structural Health Monitoring (SHM) as quantified by the …