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Fiber-optic probes for sensing and biomedical imaging applications such as optical coherence tomography (OCT) frequently employ sections of graded-index (GRIN) fiber to re-focus the diverging light from the delivery fiber. Such GRIN fiber microlenses often possess aberrations that cause significant distortions of the focused output beam. Current design methods based on ABCD matrix transformations...
As the fast development of grid-connected solar photovoltaic (PV) power supplies in recent years, the grid-connected voltage source converters (VSCs) are being considered as prime candidates for interfacing these resources to power network. In order to better meet the grid code, the control scheme of the converter becomes crucial. Currently the voltage-oriented control strategy is widely utilized...
A new type of non-reciprocal C-band magnetic tunable bandpass filter with ultra-wideband isolation is presented. The BPF was designed with a 45° rotated yttrium iron garnet (YIG) slab loaded on an inverted-L shaped microstrip transducer pair. This filter shows an insertion loss of 1.6∼2.3dB and an ultra-wideband isolation of more than 20dB, which was attributed to the magnetostatic surface wave. The...
To avoid undesired operation of backup protection caused by load encroachment under cascading failures, the methodology for vulnerability assessment of backup protection is studied. In this paper, the vulnerability assessment of backup protections is formulated as a mixed integer nonlinear programming problem, which is solved by the binary particle swarm optimization approach. The measurement index...
In this paper, an improved self organizing map (SOM)-based approach is proposed for multi-robot systems to tackle the task assignment problem which focuses on the self-organization issue with a large number of robots and a large number of task locations in dynamic environments subject to uncertainties. It is capable of dynamically controlling a group of mobile robots to achieve different task locations...
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