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In a class of nonlinear systems, additive faults act as changes in the state-transition matrix. Each fault can be characterized by a trajectory in the parameter space. Identifying the parameters online and comparing them to pre-computed trajectories offers an approach to fault isolation. The distance between the trajectories and the observations is subjected to generalized likelihood ratio (GLR) testing...
Lasing near 1300 nm in microdisks with InAs quantum dot active regions is reported for the first time. The microdisks were optically pumped at room temperature, and lasing occurred in devices that are 2.5 /spl mu/m in diameter and larger.
We present an efficient and effective approach to personal identification by parallel biometrics computing using mobile agents. To overcome the limitations of the existing password-based authentication services on the Internet, we integrate multiple personal features including fingerprints, palmprints, hand geometry and face into a hierarchical structure for fast and reliable personal identification...
The monitor concept provides a structured and flexible high-level programming construct to control concurrent accesses to shared resources. It has been widely used in concurrent programming environments for implicitly ensuring mutual exclusion and explicitly achieving process synchronization. This paper proposes an extension to the monitor construct for detecting run-time errors in monitor operations...
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