6 research outputs found
Integrated Clustering and Anomaly Detection (INCAD) for Streaming Data (Revised)
Most current clustering based anomaly detection methods use scoring schema
and thresholds to classify anomalies. These methods are often tailored to
target specific data sets with "known" number of clusters. The paper provides a
streaming clustering and anomaly detection algorithm that does not require
strict arbitrary thresholds on the anomaly scores or knowledge of the number of
clusters while performing probabilistic anomaly detection and clustering
simultaneously. This ensures that the cluster formation is not impacted by the
presence of anomalous data, thereby leading to more reliable definition of
"normal vs abnormal" behavior. The motivations behind developing the INCAD
model and the path that leads to the streaming model is discussed.Comment: 13 pages; fixes typos in equations 5,6,9,10 on inference using Gibbs
samplin
The effect of high exhaust pressures on engine performance and the availability of energy in exhaust gases at high pressures
http://www.archive.org/details/effectofhighexha00kennU.S. Navy (U.S.N.) authors.U.S. Marine Corps (U.S.M.C.) author.Approved for public release; distribution is unlimited
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Dynamics of Crust Dissolution and Gas Release in Tank 241-SY-101
Due primarily to an increase in floating crust thickness, the waste level in Tank 241-SY-101 has grown appreciably and the flammable gas volume stored in the crust has become a potential hazard. To remediate gas retention in the crust and the potential for buoyant displacement gas releases from the nonconvective layer at the bottom of the tank, SY-101 will be diluted to dissolve a large fraction of the solids that allow the waste to retain gas. The plan is to transfer some waste out and back-dilute with water in several steps. In this work, mechanisms and rates of waste solids dissolution and gas releases are evaluated theoretically and experimentally. Particular emphasis is given to crust dissolution processes and associated gas releases, although dissolution and gas release from the mixed-slurry and nonconvective layers are also considered. The release of hydrogen gas to the tank domespace is modeled for a number of scenarios. Under the tank conditions expected at the time of back-dilution, no plausible continuous or sudden gas release scenarios resulting in flammable hydrogen concentrations were identified