نتایج جستجو برای: iir
تعداد نتایج: 1637 فیلتر نتایج به سال:
یک تصویر به صورت معمولی و در حالتی که 3 بایت برای هر پیکسل (یک بایت برای هر کدام از عناصر رنگ r و g و b) آن استفاده می شود حجم قابل ملاحظه ای را اشغال می کند لذا برای کاهش این حجم از روشهای مختلف استفاده می شود. بهترین روشی که مورد استفاده قرار می گیرد روش jpeg است که دارای نسبت فشردگی خوبی است . در این پروژه سه روش فشرده سازی را اجرا کرده و آنها را نسبت به روش jpeg مقایسه کرده ایم. سه روش iir-...
Users as actors in interactive information retrieval (IIR) are seen in the contexts of their perceived work tasks and information seeking behaviour. The paper models IIR processes by demonstrating a variety of approaches, ranging from Ingwersen ́s cognitive communication model for IR interaction, over Saraceveic ́ stratified model which includes a typology of relevance conceptions, to Borlund ́s m...
This paper determines coefficients of infinite-impulse response (IIR) using Simulated Annealing (SA). IIR filter is essentially a digital filter with Recursive responses. Since the error surface of digital IIR filters is generally nonlinear and multimodal, global optimization techniques are required in order to avoid local minima. In this paper heuristic way for the designing IIR filters is pre...
The development of digital IIR (Infinite Impulse Response) filter is done on VIRTEX-6 FPGA using VHDL (Very High Speed Integrated Circuit Hardware Description Language) in XILINX Integrated Software Environment. IIR filter is analytically simulated by simulink environment in MATLAB. The digital data output of A/D converter is sent through IIR module in FPGA. Testing and debugging IIR module is ...
Digital predistortion (DPD) is used to compensate for the distortion of power amplifiers (PAs). Inspired by physical structure PA circuit, a feedback in DPD model favored. In this letter, we proposed an infinite impulse response (IIR) modeling and linearization, modifying generalized memory polynomial (GMP) model. We also propose iterative identification algorithm estimate IIR-DPD coefficients....
Ljiljana D. Mili c and Miroslav D. Lutovac Abstract|The IIR realizations of the Hilbert transformer require less computations than FIR realizations, but the main disadvantage of the minimum phase IIR realization is the nonlinearity of the phase characteristic. In this paper, we show that using allpass IIR sub lters from the minimal phase solution it is possible to design an IIR Hilbert transfor...
This paper describes a method for optimizing low-pass infinite impulse response (IIR) digital differentiators. The wide band differentiator is cascaded with low-pass IIR filter resulting in linear phase low-pass IIR digital differentiator. Further the frequency response of IIR differentiator is improved by altering the gain and denominator coefficients of that differentiator. The genetic algori...
In literature and art, suspension of disbelief is the willingness of the audience to accept a premise as true even if it is not possible in the real world. Audience members must set-aside their beliefs about the world and accept one or more premises which form the foundation for the new world. Research also requires a suspension of disbelief, especially research conducted in the laboratory. In ...
BACKGROUND Tests for recent infections (TRIs) are important for HIV surveillance. We have shown that a patient's antibody pattern in a confirmatory line immunoassay (Inno-Lia) also yields information on time since infection. We have published algorithms which, with a certain sensitivity and specificity, distinguish between incident (< = 12 months) and older infection. In order to use these algo...
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