A deeper understanding of what is going on in a given text is still one of the most interesting and challenging goals in NLP. Sentiment analysis has recently started to contribute to this area. We no longer just try to predict the polarity of whole product reviews but to distinguish various perspectives inherent to a text, namely, what the author is telling us, how he implicitly or explictely e...

We revise the classic methodology to find the multi-product break-even point. In the current paper we propose a solution to the problem under uncertainty conditions, based on Durán Herrera’s crisp approach [3] and applying fuzzy linear programming. We introduce the concept of approximate break-even for cases in which, due to the nature of the problem, it is not possible to find the break-even p...

a direct conversion modulator-demodulator with even harmonic mixers with emphasis on noise analysis is presented. the circuits consist of even harmonic mixers (ehms) realized with antiparallel diode pairs (apdps). we evaluate the different levels of i/q imbalances and dc offsets and use signal space concepts to analyze the bit error rate (ber) of the proposed transceiver using m-ary qam schemes...