March 27, 2007 Congratulations
PhD student Li Zeng's paper has been accepted to IIE Transactions :
"Variability Monitoring of Multistage Manufacturing Processes Using Regression Adjustment Methods"
March 27, 2007 Congratulations
PhD student Nan Chen's first paper has been submitted to IIE Transactions
November 5-8, 2006
Informs Conference in Pittsburgh,PA
› PhD student Zhiguo Li presents his work at Informs Annual Meeting:
Title: Discrete Event Sequence Data Monitoring Using Rank Test
Abstract: Discrete event sequence data
has become an important type of data in the service and maintenance.
This paper, without any distributional assumption for the event history data,
develops a monitoring procedure for the hazard rate of failures using the
rank test. Based on the asymptotic properties of the rank statistic,
a generic formula for the operating-characteristic of the control chart is
derived to show the relationship of the type-I error, type-II error, sample
size and hazard rate change.
› PhD student Jean-Philippe Loose presents his work at Informs Annual Meeting:
Title: Variation Source Identification in Manufacturing Using Nonlinear Measurements
Abstract: This paper presents a variation source identification procedure
in the presence of nonlinear measurements, which refers to the measurements
that are related with the process variation sources through a nonlinear function.
In the proposed procedure, the joint probability density of the measurements
is determined as a function of the process parameters; then, series of statistical
tests are performed to identify the variation source. A case study is used to illustrate the procedure.
› PhD student Li Zeng presents her work at Informs Annual Meeting:
Title: Influence of Sensor Noise in Regression Adjustment Method for Quality Control
Abstract: In the regression adjustment method, one can choose
to monitor the residual resulted from the adjustment for all possibly related
variables or monitor that from the adjustment for an directly influential
subset identified through a model selection procedure. In this paper, it is shown
theoretically that when sensor noise is negligible, these two kinds of adjustment are
equivalent. Otherwise the first adjustment will lead to higher false alarming rate and lower detection rate.
› Pr. Shiyu Zhou presents his work at Informs Annual Meeting:
Title: Automatic Feature Selection for Unsupervised Clustering of Cycle-Based Signals
Abstract: A cycle-based signal refers to an analog or digital
signal that is obtained during each repetition of operation cycles
in a manufacturing process. Different from the available supervised
classification approaches that depend heavily on the training dataset or the
engineering field knowledge, this paper aims to developing an automatic feature
selection method for unsupervised clustering of cycle-based signals. The technique is a data
pre-processing technique for process monitoring and diagnosis.
September 1, 2006
Welcome to Nan Chen
Nan Chen just joined the M-PAC laboratory. He will start his first semester of the PhD program this Fall.
July 10, 2006 Congratulations
PhD student Zhiguo Li's paper has been submitted to IIE Transactions:
"Time Between-Events Data Monitoring Using Rank Test"
May 12, 2006 Congratulations
PhD student Zhiguo Li's paper has been accepted by IIE Transactions:
"Failure Event Prediction Using Cox Proportional Hazard Model Driven by Failure Signature"
April 18, 2006 Congratulations
PhD student Nong Jin succesfully defended his PhD Dissertation titled:
"". He is the first alumni from the MPAC Laboratory and will join Capital One in Richmond (VA) in May 2006. Congratulations Dr. Jin !! (pictures)
April 11, 2006 Congratulations
PhD student Nong Jin submitted his paper to IIE Transactions:
"Multiple Fault Signatures Integration and Enhancing for Variation Source Identification in Manufacturing Processes"
February 28, 2006 Congratulations
PhD student Zhiguo Li's paper has been accepted by IIE Transactions:
"Pattern Matching for Variation Source
Identification in Manufacturing Processes with the Presence of Unstructured Noises"
February 8, 2006 Qualifying Examination
Congratulations to PhD students Li Zeng
for passing her qualifying examination in the Quality area.
PhD student Li Zeng thereby completes the
Industrial and Systems Engineering department's
Qualifying Exam requirement and may officially proceed with her PhD degree.
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