We have investigated the intraband dynamics of non-equilibrium carriers in semiconductors, using a picosecond far-infrared (FIR) free-electron laser synchronized with a femtosecond near-infrared (NIR) Ti : sapphire laser. An intense NIR pulse creates carriers, which interact with a delayed FIR pulse. We detect time-resolved cyclotron resonance by monitoring the intensity of the transmitted and ...

A feedforward control algorithm for active noise control based on the recursive estimation of a generalized finite impulse response (FIR) filter is presented in this paper. Recursive least square estimation (RLSE) with variable forgetting factors is applied to a commercial air ventilation silencer to provide the online estimation of the generalized finite impulse response (FIR) filter to obtain...

Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) is the most important conifer species for timber production with huge distribution area in southern China. Accurate estimation of biomass is required for accounting and monitoring Chinese forest carbon stocking. In the study, allometric equation W = a(D2H)b was used to analyze tree biomass of Chinese fir. The common methods for estimating allo...

We present a new method for general multidimensional multichannel deconvolution with finite impulse response (FIR) convolution and deconvolution filters using Gröbner bases. Previous work formulates the problem of multichannel FIR deconvolution as the construction of a left inverse of the convolution matrix, which is solved by numerical linear algebra. However, this approach requires the prior ...

The new analysis and synthesis filters are z-1MH(z) Abstract and zIMFk(z), which means that the frequency charCausal FIR matrices with anticausal FIR inverses have acteristics are unchanged. By choosing I large enough a key role in the theory of FIR perfect reconstruction we can make E&) causal and its inverse R&) antifilter banks. We explore the theory of such matricausal. So the class of all ...

Far infrared (FIR) radiation (λ = 3-100 μm) is a subdivision of the electromagnetic spectrum that has been investigated for biological effects. The goal of this review is to cover the use of a further sub-division (3- 12 μm) of this waveband, that has been observed in both in vitro and in vivo studies, to stimulate cells and tissue, and is considered a promising treatment modality for certain m...

A new technique for the design of finite impulse response (FIR) filters for decimation and interpolation in multi rate systems is presented. With this technique, FIR preand postfilters that jointly minimize a frequency-weighted mean-square (MS) error between the original and reconstructed signals can be designed. Unlike most other FIR filter design methods, there is no need for ideal filter pro...

Far infrared (FIR) radiation ( λ = 3 – 100 μ m) is a subdivision of the electromagnetic spectrum that has been investigated for biological effects. The goal of this review is to cover the use of a further sub-division (3 – 12 μ m) of this waveband, that has been observed in both in vitro and in vivo studies, to stimulate cells and tissue, and is considered a promising treatment modality for cer...

Recursive and least squares methods for identification of non-minimum-phase linear time-invariant (NMP-LTI) FIR systems are developed. The methods utilize the secondand third-order cumulants of the output of the FIR system whose input is an independent, identically distributed (i.i.d.) non-Gaussian process. Since knowledge of the system order is of utmost importance to many system identificatio...

Digital filter plays an important role in Very Large Scale Integration (VLSI) technology. The existing Finite Impulse Response (FIR) filter has long transient response which is the major limitation. To overcome this drawback, Residue Number System (RNS) based FIR filters is developed which is described in this paper. High-speed is obtained by introducing the residue arithmetic concept that perm...