Recent Patents on Electrical & Electronic Engineering (Formerly Recent Patents on Electrical Engineering) - Volume 6, Issue 1, 2013

At present, electroencephalogram (EEG) and electrocardiogram (EKG) recording requires contact electrodes that are inconvenient and time-consuming to apply. Emerging technology based on non-contact electrodes may alter the way such data are gathered in clinical, field and research settings. A number of investigators have demonstrated that clinical- grade EKG and EEG tracings can be obtained using electrodes that Read More

Electrical Discharge Machining (EDM) is a well-established machining process in which material is gradually removed during an electrical discharge process to form a desired shape. There are a number of factors that impact the efficiency and surface finish quality of the EDM process. In this paper, background of the EDM and such factors are discussed, followed by a review of different control methods that have been propos Read More

This technical article presents the concepts for improving the electricity price forecasting which were patented (application no. IN236/MUM/2011). A novel system and method for electricity price forecasting are also disclosed to set the context for explaining the technicalities involved in the invention. The invention relates to forecasting, and particularly to price forecasting by employing error correction techniques external to Read More

Recent progress and patents on channel estimation algorithms in optical orthogonal frequency division multiplexing (OFDM) systems are reviewed. The channel estimation algorithms can be divided into two categories of pilotaided and blind approaches. For the pilot-aided schemes, the two pilot patterns including the comb-type pilots and blocktype pilots are evaluated by experiments. For the blind schemes, the phase noise caus Read More

All-optical logic gate and switch are the key elements for ultrafast (>100 Gbit/s) signal processing in highspeed optical networks. Recent progress and related patents on all-optical logic gates based on semiconductor optical amplifiers (SOAs) are reviewed and optical switches with various configurations are discussed. The frequency-domain analysis of the turbo-switch (TS) incorporating two cascading SOAs is presented in Read More

Recent patents and progress on all-optical binary pattern recognition using the passive correlator and all-optical logic gates have been reviewed. The correlator is relative simpler and easy to be implemented, however the path number of the correlator is dependent on the length of target pattern. In contrast, the pattern recognition system based on alloptical SOA logic gates can be a promising alternative even for high bit- Read More

Concentration prediction of dissolved gases in power transformer oil is very significant to detect incipient failures of transformer early. Concentration prediction of dissolved gases in power transformer oil is complicated problem due to its nonlinearity and little training data. Relevance vector regression algorithm (RVR) is applied to concentration prediction of dissolved gases in transformer oil in this paper. Co Read More

Most of the equipment found in the modern electrical installations can be considered as harmonic sources. Harmonic pollution causes serious problems to all electrical users. Many solutions are used to limit the problems related to harmonics and other power quality disturbances. The most used approach is to use shunt passive filters due to their simplicity, economical cost and their various frequency response characteristic Read More