Fang Tu

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— Prognostic techniques are intricately tied to the physics of incipient-fault-to-failure progression, and hence most prognostics research has focused on developing techniques for a range of components such as rotating machinery parts. The research and development of such techniques has relied on the theories of material science, structural mechanics,(More)
This paper presents a library of algorithms to solve a broad range of optimization problems arising in the normative design of organizations to execute a specific mission. The use of specific optimization algorithms for different phases of the design process leads to an efficient matching between the mission structure and that of an organization and its(More)
—Key management is at the heart of securing wireless sensor networks. Exclusion Basis Systems (EBS) is a combinatorial framework for group key management. It is secure and efficient for dynamic key management; however it could not resist collusion attack. A novel scheme combining EBS with broadcasting polynomial, LEP was proposed to solve this problem.(More)
[1] Fast time resolution (>1 Hz) sulfur dioxide (SO 2) measurements were obtained using an atmospheric pressure ionization mass spectrometer with isotopically labeled internal standard on the NASA Wallops P-3B during the NASA Transport and Chemical Evolution Over the Pacific (TRACE-P) field experiment. The high time resolution for SO 2 allowed a view into(More)
Test sequencing is a binary identification problem wherein one needs to develop a minimal expected cost test procedure to determine which one of a finite number of possible failure states, if any, is present. In this paper, we consider a multimode test sequencing (MMTS) problem, in which tests are distributed among multiple modes and additional transition(More)