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In this paper we present the recent improvement of a silicon micro-mechanical vibrating beam accelerometer (SVBA) which combine the advantage of low cost of silicon MEMS fabrication technology, small size vacuum wafer level package, low noise low power application-specific integrated oscillation circuit and digital frequency demodulation technology. Under room temperature, it has achieved bias instability...
This paper demonstrates a silicon resonant accelerometer which consists of a MEMS structure and an ASIC readout circuit. The MEMS sensor is fabricated in an 80-µm thick SOI process with a wafer level vacuum package. For noise reduction, several techniques are employed during the circuit design. And in order to reduce the temperature drift due to self heating, the power consumption is carefully limited...
In recent years, electrodeionization technology has been widely used for ultrapure water production. The effects of major operational parameters such as feed hardness, dilute flux and stack voltage on dilute product resistivity and scaling extend were investigated through an orthogonal experiment(L9(3)4). The factorial results of Design-Expert software revealed that the interaction of dilute flux...
In this paper, we consider the broadcast (BRC) phase of two-way decode-and-forward (DF) relaying systems. The channel in that phase is called the bidirectional broadcast channel. Its achievable rates are calculated when the self-interference aided channel estimation scheme is applied. We consider a block- fading channel model in the BRC phase and exploit the self- interference that is inherent in...
The negative effect of the session variability has become more and more severe for the performance of the speaker verification system. This paper discusses the eigenchannel compensation and investigates the symmetric scoring method to diminish the session variability and further enhance the performance. Experiments were conducted on the core tests of the 2006 and 2008 speaker recognition evaluation...
In this paper, we propose a novel channel estimation scheme for the broadcast phase of the newly invented two- way relaying technique. Instead of using pilot sequences, we exploit the self-interference, which contains the data known at the receivers, to get a first estimate of the channel. Then a decision- directed iterative estimation process is started to improve the accuracy of the channel estimates...
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