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Applications that involve client-server communication sometimes require the execution of asynchronous processes on the server side. We have created a framework for distributed object programming, called Web Objects in XML (WOX), which uses HTTP as transport protocol, XML for object representation, and provides synchronous and asynchronous communication between clients and servers. This paper presents...
This paper presents a sensor system used to measure the height variations of the overhead contact wire feeding electric traction trains when a pantograph is passing. These measures are used to determine the occurrence of defects in the catenary-pantograph interaction. The non-contact sensor for monitoring catenary-pantograph interaction (NCCPI) system consists of a line-scan camera focused to an infrared...
This paper presents a new frequency-adaptive synchronization method for grid-connected power converters which allows estimating not only the positive- and negative-sequence components of the power signal at the fundamental frequency, but also other sequence components at multiple frequencies. The proposed system is called the MSOGI-FLL since it is based on a decoupled network consisting of multiple...
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