Both oxidative stress and mast cell (MC) degranulation participate in the process of small intestinal ischemia reperfusion (IIR) injury, and oxidative stress induces MC degranulation. Propofol, an anesthetic with antioxidant property, can attenuate IIR injury. We postulated that propofol can protect against IIR injury by inhibiting oxidative stress subsequent from NADPH oxidase mediated MC acti...

Fractional delay (FD) filters are an important class of digital filters and are useful in various signal processing applications. In this paper, the design problem of the maxflat FD IIR filters is discussed, and a new closed-form expression for its filter coefficients is presented. The filter coefficients are directly derived by solving a linear system of Vandermonde equations, which are obtain...

In some situations of active noise control, infinite impulse response (IIR) filters are more suitable than finite impulse response (FIR) filters owing to the poles in the transfer function. A number of algorithms have been derived for applying IIR filters in active noise control; however, most of them use the direct form IIR filter structure, which faces the difficulties of checking stability a...

In this correspondence, we develop an adaptive IIR algorithm by means of least squares inverses; the algorithm also guarantees the resulting IIR system to be stable.

This paper presents an infinite impulse response (IIR) structure for designing a three-port optical interleaver. With the proposed IIR structure, the spectral responses of the interleaver can be designed in two steps to achieve simultaneously three channels of identical but 2pi/3 shifted passband transmissions. Compared with a three-port finite impulse response (FIR) interleaver, the proposed I...

Lack of theoretical foundation in the design and development of interactive information retrieval (IIR) systems has been the major limitation in the field. Application of information seeking theories and models has also been limited in IIR. This paper is concerned with an approach to facilitate theoretical development in IIR based on cognitive effects, which can be considered in the evaluation ...

In this paper, a design methodology to implement low-power and high-speed 2nd order recursive digital Infinite Impulse Response (IIR) filter has been proposed. Since IIR filters suffer from a large number of constant multiplications, the proposed method replaces the constant multiplications by using addition/subtraction and shift operations. The proposed new 6T adder cell is used as the Carry-S...

Abstract: Antenna array-based multi-dimensional infinite-impulse response (IIR) digital beamformers are employed in a multitude of radio frequency (RF) applications ranging from electronically-scanned radar, radio telescopes, long-range detection and target tracking. A method to design 3D IIR beam filters using 2D IIR beam filters is described. A cascaded 2D IIR beam filter architecture is prop...

Linear di erence equations involving recurrences are fundamental equations that describe many important signal processes, in particular, in nite-duration impulse response (IIR) lters. Applying conventional dependence-preserving parallelization techniques such as software pipelining can only extract limited parallelismdue to loop-carried dependences in the linear recurrences, and thus cannot ach...

In the design of IIR digital filters, the method that utilizes the classic analog filter design theory to design analog filters and then obtain the corresponding digital filters by s–z transformation is well-known. However, IIR digital filters obtained via the bilinear s–z transformation have just equal-order numerator and denominator. Having unequal-order numerator and denominator will give mo...