The paper presents novel recursive algorithms for realization of one-dimensional type-II discrete cosine transform (DCT) and inverse discrete cosine transform (IDCT) of any length. By using some mathematical techniques, recursive expressions for DCT and IDCT have been developed. The number of additions and multiplications in the recursive algorithm for DCT are less in comparison with some other...

Control of aftertreatment systems for lean burn technology engines represents a big challenge, due to the lack of on-board emission measurements and the sensitivity of the hardware components to ageing and sulphur poisoning. In this paper, we consider the control and adaptation of aftertreatment systems involving lean NOx trap (LNT). A phenomenological LNT model is presented to facilitate the m...

Conventional methods for incorporating temporal information into speech features apply regression to a series of successive cepstral vectors to generate differential cepstra, or apply a cosine transform to generate cepstral-time matrices. This paper aims to generalise these techniques such that a series of stacked cepstral vectors is multiplied by a temporal transform matrix to produce the fina...

Low-power design is one of the most important challenges to maximize battery life in portable devices and to save the energy during system operation. Discrete Cosine Transform (DCT) is widely used in image and video compression standards. In this paper, we review on a low-power DCT (Discrete Cosine Transform) architecture using varies techniques. Discrete Cosine Transform (DCT) is one of the mo...

BACKGROUND Changing the fuel supply from petroleum based ultra-low sulfur diesel (ULSD) to biodiesel and its blends is considered by many to be a viable option for controlling exposures to particulate material (PM). This is critical in the mining industry where approximately 28,000 underground miners are potentially exposed to relatively high concentrations of diesel particulate matter (DPM). T...

The stringent regulations on the emissions levels of heavy duty vehicles create a demand for new methods of reducing harmful emissions from the engine. In order to be able to follow these increasingly stricter legislations, complex aftertreatment systems are used. Achievement of optimal performance of these systems requires accurate models that can be used for control design. As a result, the i...

NOx –SCR over Ag/ Al2O3 catalyst using ethanol (C2H5OH) as a reductant has proven its ability to significantly reduce NOx emission in a simulated engine exhaust gas environment. However the real engine exhaust gas environment is too complicated to be simulated. Therefore,the performance evaluation of the Ag/ Al2O3 catalyst in real exhaust gas environment is necessary. Moreover, the ethanol dosi...

Image compression is the need of modern digital image processing devices to save larger images.By using the image compression algorithms which has better performance of compression. In this, implementing the compression technique which works on discrete cosine transform (DCT) image sub-block and use of fuzzy logic. There are so many techniques for compression but in this paper only present and ...