Relevant bibliographies by topics / IIR

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'IIR'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 April 2024

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Journal articles on the topic "IIR"

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Pohl, Radek, Viktor Prutianov, and Svatava Smrčková-Voltrová. "Nucleophilic Substitution in a Series of 4-Nitronicotinic Acid 1-Oxide Derivatives." Collection of Czechoslovak Chemical Communications 60, no. 7 (1995): 1170–77. http://dx.doi.org/10.1135/cccc19951170.

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Nucleophilic substitution of the nitro group in 4-nitro-3-pyridinecarboxanilide 1-oxide (IIa) afforded 4-hydroxy- (IIb), 4-chloro- (IIc), 4-methoxy- (IId), 4-ethoxy- (IIe), and 4-dimethylamino-3-pyridinecarboxanilide (IIf). The 1H and 13C NMR chemical shifts of the pyridine moiety were correlated with the Hammett constants of the substituent in position 4, with the exception of compound IIb. The reason of this phenomenon is discussed.
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Weng, Yueh-Shan, Hsueh-Fang Wang, Pei-Ying Pai, Gwo-Ping Jong, Chao-Hung Lai, Li-Chin Chung, Dennis Jine-Yuan Hsieh, Cecilia HsuanDay, Wei-Wen Kuo, and Chih-Yang Huang. "Tanshinone IIA Prevents Leu27IGF-II-Induced Cardiomyocyte Hypertrophy Mediated by Estrogen Receptor and Subsequent Akt Activation." American Journal of Chinese Medicine 43, no. 08 (January 2015): 1567–91. http://dx.doi.org/10.1142/s0192415x15500895.

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IGF-IIR plays important roles as a key regulator in myocardial pathological hypertrophy and apoptosis, which subsequently lead to heart failure. Salvia miltiorrhiza Bunge (Danshen) is a traditional Chinese medicinal herb used to treat cardiovascular diseases. Tanshinone IIA is an active compound in Danshen and is structurally similar to 17[Formula: see text]-estradiol (E[Formula: see text]. However, whether tanshinone IIA improves cardiomyocyte survival in pathological hypertrophy through estrogen receptor (ER) regulation remains unclear. This study investigates the role of ER signaling in mediating the protective effects of tanshinone IIA on IGF-IIR-induced myocardial hypertrophy. Leu27IGF-II (IGF-II analog) was shown in this study to specifically activate IGF-IIR expression and ICI 182,780 (ICI), an ER antagonist used to investigate tanshinone IIA estrogenic activity. We demonstrated that tanshinone IIA significantly enhanced Akt phosphorylation through ER activation to inhibit Leu27IGF-II-induced calcineurin expression and subsequent NFATc3 nuclear translocation to suppress myocardial hypertrophy. Tanshinone IIA reduced the cell size and suppressed ANP and BNP, inhibiting antihypertrophic effects induced by Leu27IGF-II. The cardioprotective properties of tanshinone IIA that inhibit Leu27IGF-II-induced cell hypertrophy and promote cell survival were reversed by ICI. Furthermore, ICI significantly reduced phospho-Akt, Ly294002 (PI3K inhibitor), and PI3K siRNA significantly reduced the tanshinone IIA-induced protective effect. The above results suggest that tanshinone IIA inhibited cardiomyocyte hypertrophy, which was mediated through ER, by activating the PI3K/Akt pathway and inhibiting Leu27IGF-II-induced calcineurin and NFATC3. Tanshinone IIA exerted strong estrogenic activity and therefore represented a novel selective ER modulator that inhibits IGF-IIR signaling to block cardiac hypertrophy.
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Milata, Viktor, Dušan Ilavský, Igor Goljer, and Lubomír Zalibera. "Thermal Cyclocondensation of Ethyl (1-Methyl-5- and 6-Benzimidazolyl/benzotriazolyl)aminomethylenepropanedioates." Collection of Czechoslovak Chemical Communications 59, no. 5 (1994): 1145–52. http://dx.doi.org/10.1135/cccc19941145.

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Thermal cyclocondensation of starting ethyl (1-methyl-5- and 6-benzimidazolyl/benzotriazolyl)aminomethylenepropanedioates (Ia - Ie) in aprotic medium gives angularly condensed ethyl azolo[4,5-f]quinolonecarboxylates IIa, IIc, IIe and azolo[5,4-f]quinolonecarboxylates IIb, IId, respectively, which are hydrolyzed to the corresponding carboxylic acid III in acid medium. The structure of reaction products has been confirmed by 1H and 13C NMR, IR, and UV spectroscopy.
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Shore, Anna, Angela S. Rossney, Conor T. Keane, Mark C. Enright, and David C. Coleman. "Seven Novel Variants of the Staphylococcal Chromosomal Cassette mec in Methicillin-Resistant Staphylococcus aureus Isolates from Ireland." Antimicrobial Agents and Chemotherapy 49, no. 5 (May 2005): 2070–83. http://dx.doi.org/10.1128/aac.49.5.2070-2083.2005.

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ABSTRACT Methicillin-resistant Staphylococcus aureus (MRSA) isolates recovered in Irish hospitals between 1971 and 2002 were characterized using multilocus sequence typing (MLST) (n = 130) and SCCmec typing (n = 172). Where atypical SCCmec typing results were obtained, PCR amplification of entire SCCmec elements, analysis of amplimer mobility, and nucleotide sequencing were undertaken. MLST revealed that 129/130 isolates had the same genotypes as internationally spread MRSA clones, including ST239, ST247, ST250, ST5, ST22, ST36, and ST8. A novel genotype, ST496, was identified in one isolate. Half of the isolates (86/172) had SCCmec type I, IA, II, III, or IV. The remaining 86 isolates harbored novel SCCmec variants in three distinct genetic backgrounds: (i) 74/86 had genotype ST8 and either one of five novel SCCmec II (IIA, IIB, IIC, IID, and IIE) or one of two novel SCCmec IV (IVE and IVF) variants; (ii) 3/86 had genotype ST239 and a novel SCCmec III variant; (iii) 9/86 had a novel SCCmec I variant associated with ST250. SCCmec IVE and IVF were similar to SCCmec IVc and IVb, respectively, but differed in the region downstream of mecA. The five SCCmec II variants were similar to SCCmec IVb in the region upstream of the ccr complex but otherwise were similar to SCCmec II, except for the following regions: SCCmec IIA and IID had a novel mec complex, A.4 (ΔmecI-IS1182-ΔmecI-mecR1-mecA-IS431mec); SCCmec IIC and IIE had a novel mec complex, A.3 (IS1182-ΔmecI-mecR1-mecA-IS431mec); SCCmec IID and IIE lacked pUB110; SCCmec IIC and IIE lacked a region of DNA between Tn554 and the mec complex; and SCCmec IIB lacked Tn554. This study has demonstrated a hitherto-undescribed degree of diversity within SCCmec.
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Haedar, Jabal, Agustinus Uria, Subehan Lallo, Dya Fita Dibwe, and Toshiyuki Wakimoto. "New Theonellapeptolides from Indonesian Marine Sponge Theonella swinhoei as Anti-austerity Agents." Marine Drugs 20, no. 11 (October 25, 2022): 661. http://dx.doi.org/10.3390/md20110661.

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We reported three new members of the theonellapeptolide family from theonellapeptolide II series, namely theonellapeptolides IIb (1), IIa (2), IIc (3), and three known members—IId (4), IIe (5), and Id (6)—from Kodingarengan marine sponge Theonella swinhoei collected in Makassar, Indonesia. The structures of tridecadepsipeptides 1–3, including the absolute configurations of their amino acids, were determined by the integrated NMR and tandem MS analyses followed by Marfey’s analysis. To the best of our knowledge, 1 and 2 are the first theonellapeptolide-type compounds to have a valine residue with D configuration at residue position 6. The isolated theonellapeptolide-type compounds 1–6 showed selective cytotoxic activity against human pancreatic MIA PaCa-2 cancer cells in a nutrient-deprived medium. Among them, the most potent preferential cytotoxicity was observed in new theonellapeptolide IIc (3) and known IId (4), IIe (5), and Id (6).
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Bae, Tae-Suk, and Chang-Ki Hong. "Analysis of Parameter Correlations of the ECOM Solar Radiation Pressure Model for GPS Orbit." Journal of Sensors 2019 (April 16, 2019): 1–9. http://dx.doi.org/10.1155/2019/5190496.

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The modeling of solar radiation pressure is the most important issue in precision GNSS orbit determination and is usually represented by constant and periodic terms in three orthogonal axes. Unfortunately, these parameters are generally correlated with each other due to overparameterization, and furthermore, the correlation does not remain constant throughout a long-term period. A total of 500 weeks of GPS daily solutions were estimated with the empirical CODE orbit model (ECOM) to cover various block types of satellites. The statistics of the postfit residuals were analyzed in this study, which shows the dominant annual variation of the correlations over time. There is no significant difference between eclipsing and noneclipsing satellites, and the frequency of the correlation exactly corresponds to the GPS draconitic year. Based on the residual analysis, the ECOM is the most appropriate for the Block IIR/IIR-M satellites but does not properly account for the behavior of either older Block IIA or newer IIF satellites. In addition, the daily mean residuals show a different pattern for satellite orbital planes. Therefore, the orbit model should be customized for the block types and orbital plane for better representation of multi-GNSS orbits.
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PERIŠIĆ, DJURDJE M. "NEW KIND OF IIR DIGITAL FILTERS INTENDED FOR PULSE PERIOD FILTERING." REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE 69, no. 1 (April 1, 2024): 61–66. http://dx.doi.org/10.59277/rrst-ee.2024.1.11.

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This paper describes a new kind of infinite impulse response (IIR) digital filter designed for pulse period filtering. The IIR digital filter is designed using a third-order IIR frequency locked loop (IIR FLL), which is based on the time measurement and processing of both, the input and output periods. A general form of the difference equation describing this type of IIR FLL of any order is developed and compared with the corresponding difference equation of classical digital filters. The mathematical analyses in the time domain were performed using the Z transform approach and the theory of linear discrete systems. An analysis of the IIR digital filter was performed in the time and frequency domain. The transfer functions and Z transform of the third-order IIR FLL outputs are developed. The main part of the article is devoted to designing the appropriate IIR FLL digital filter using the corresponding IIR FLL. For this purpose, the theory of IIR digital filter and the corresponding MATLAB tools are used, but taking into account the differences between these systems. The filtering abilities of the designed IIR FLL digital filter are demonstrated. Computer simulation of the designed IIR FLL is made in the time domain to enable precise insight into its properties.
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Tang, Qi, Shiteng Hu, Lijing Han, Chengzhong Zong, and Jujie Sun. "Morphological Evolution and Damping Properties of Dynamically Vulcanized Butyl Rubber/Polypropylene Thermoplastic Elastomers." Polymers 14, no. 13 (July 4, 2022): 2740. http://dx.doi.org/10.3390/polym14132740.

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We successfully prepared butyl rubber (IIR)/polypropylene (PP) thermoplastic vulcanizate (IIR/PP-TPV) for shock-absorption devices by dynamic vulcanization (DV) using octyl-phenolic resin as a vulcanizing agent and studied the morphological evolution and properties during DV. We found that the damping temperature region of the IIR/PP-TPV broadened with the disappearance of the glass transition temperature (Tg) in the PP phase, which is ascribed to the improvement of compatibility between the IIR and PP with increasing DV time. As DV progresses, the size of the dispersed IIR particles and the PP crystalline phase decreases, leading to the formation of a sea–island morphology. After four cycles of recycling, the retention rates of tensile strength and elongation at break of the IIR/PP-TPV reached 88% and 86%, respectively. The size of the IIR cross-linking particles in the IIR/PP-TPV becomes larger after melt recombination, and the continuous PP phase provides excellent recyclability. Significantly, the prepared IIR/PP-TPV exhibits excellent recyclability, high elasticity, and good damping property.
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Wanninger, Lambert. "Detection of RINEX-2 Files With Mixed GPS L2P(Y)/L2C Carrier Phase Observations." Sensors 18, no. 12 (December 19, 2018): 4507. http://dx.doi.org/10.3390/s18124507.

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Presently, the global positioning system (GPS) satellite constellation consists of 40% older Block IIA and IIR space vehicles and 60% newer IIR-M and IIF satellites. Only newer GPS satellites are capable of transmitting the L2C signal which is in quadrature to the legacy L2P(Y) signal being broadcast by all satellites. The data format RINEX-2 is not prepared to contain carrier phase observations of both L2 signals, but should contain either one or the other. If a mix of unaligned L2P(Y) and L2C carrier phase observations are stored in a RINEX-2 file, the quarter cycle bias causes the file to be defective and not usable for precise positioning purposes. Algorithms that detect such files are presented in this study. They are mainly based on the analysis of widelane fractional ambiguities and were applied to RINEX-2 files of 2624 reference stations. Seventy-two station files (2.7%) were found to be defective since they contained mixed and unaligned L2P(Y) and L2C carrier phase observations. If such files are used for precise positioning with ambiguities being fixed to integer values, resulting coordinate errors in long baselines can reach centimeter levels. Unaligned L2 observations often prevent ambiguity fixing, especially in short baselines.
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Zhao, Weicheng, Xiaolei Huang, Xue Han, Dan Hu, Xiaohuai Hu, Yuantao Li, Pinjie Huang, and Weifeng Yao. "Resveratrol Suppresses Gut-Derived NLRP3 Inflammasome Partly through Stabilizing Mast Cells in a Rat Model." Mediators of Inflammation 2018 (December 20, 2018): 1–10. http://dx.doi.org/10.1155/2018/6158671.

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Background. Inflammatory responses induced by intestinal ischemia-reperfusion (IIR) lead to serious systemic organ dysfunction and pose a challenge for current treatment. This study aimed at investigating the effects of resveratrol on IIR-induced intestinal injury and its influence on mast cells (MCs) in rats. Methods. Rats subjected to intestinal ischemia for 60 min and 4 h of IIR were investigated. Animals were randomly divided into five groups (n=8 per group): sham, IIR, resveratrol (RESV, 15 mg/kg/day for 5 days before operation) + IIR, cromolyn sodium (CS, MC membrane stabilizer) + IIR, and RESV + compound 48/80 (CP, MC agonist) + IIR. Results. Intestinal injury and increased proinflammatory cytokines including tumor necrosis factor-α, interleukin-1β, and interleukin-18 were observed in the IIR group. Intestinal MC-related tryptase and β-hexosaminidase levels were also increased after rats were subjected to IIR accompanied by activation of NLRP3 inflammasomes. Interestingly, pretreatment with resveratrol significantly suppressed the activities of proinflammatory cytokines and attenuated intestinal injury. Resveratrol also reduced MC and NLRP3 inflammasome activation, which was consistent with the effects of cromolyn sodium. However, the protective effects of resveratrol were reversed by the MC agonist compound 48/80. Conclusions. In summary, these findings reveal that resveratrol suppressed IIR injury by stabilizing MCs, preventing them from degranulation, accompanied with intestinal mucosa NLRP3 inflammasome inhibition and intestinal epithelial cell apoptosis reduction.
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Dissertations / Theses on the topic "IIR"

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CUNHA, FERNANDO BRANDAO LOBATO. "ADAPTATION ALGORITHM OF IIR." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1991. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9838@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
A partir da forma geral do algoritmo de adaptação, é proposto o uso de mais uma variável de projeto, denominada janela. Esta janela tem por objetivo melhorar as características de convergência de algoritmos, cujos parâmetros são partes de estruturas IIR. A introdução das janelas é justificada heuristicamente e seu desempenho é avaliado por meio de diversas simulações de identificação de sistemas. Os resultados obtidos indicam aumentos significativos na velocidade de convergência (cerca de uma ordem de grandeza mais rápido do que os algoritmos atualmente mais usados), na precisão das estimativas dos parâmetros do problema e na robustez dos novos algoritmos (menor número de pólos instáveis durante a adaptação). Estes resultados foram observados em ambientes estacionários e não estacionários, com e sem ruído de medida e com ordem de identificação suficiente ou não.
From the adaptation algorithm general form it is proposed the usage of another design variable, called Window. The goal of this Window is to improve the convergence characteristics of algorithms whose parameters are parts of IIR Structures. The introduction of the Window is heuristically justified and its performance is eventuated by several system identification simulations. The results achieved suggest significant increase in the convergence speed (about one order of magnitude faster than the currently most used algorithms), in the parameter estimation precision and in the new algorithm robusteness (fewer unstable poles during adaptation). These results were observed in sationary and non-stationary environments, with and without measurement noise and with sufficient identification order or not.
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FACEROLI, SILVANA TEREZINHA. "STABILIZATION OF ADAPTIVE IIR FILTERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8628@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
De modo geral, as análises de estabilidade em filtragem digital adaptativa referem-se a possíveis instabilidades nos algoritmos de adaptação. Entretanto, a estabilização do algoritmo é apenas parte do problema, visto que também deve ser considerada a estabilização das estruturas recursivas onde operam estes algoritmos. Este trabalho discute a estabilização das estruturas recursivas de filtragem digital utilizadas em filtros IIR adaptativos, apresentando soluções para seu emprego em tempo real. A estabilização da estrutura, somada a do algoritmo, tem o objetivo de estabilizar a operação do filtro como um todo. O estudo inicia pela análise dos principais algoritmos para filtros IIR adaptativos, enfatizando o aspecto estabilidade. Desta forma, pode-se atribuir eventuais instabilidades ocorridas na seqüência do trabalho apenas à estrutura, evitando confundi-las com problemas do algoritmo. Na seqüência, é proposto um novo algoritmo que pretende estabilizar as estruturas recursivas dos filtros IIR digitais através de um modelo com estrutura adaptável. O método é baseado na variação percentual da energia do erro, calculada em tempo real. Finalmente, são apresentados alguns exemplos, indicando a viabilidade do método proposto. Eles ainda mostram benefícios adicionais no seu uso no aspecto velocidade de convergência e redução de eventuais polarizações de parâmetros do processo.
The stability analysis in adaptative digital filters is generally referred to possible instabilities in the adaptation algorthms. However, the algorithm stabilization is only part of the problem, because the stabilization of the recursive structures, where this algorithms operate, should be also considered. This work discusses the stabilization of digital filtering recursive structures that are used in adaptative IIR filters, presenting solutions to its use real time. The stabilization of the structure, added to the stabilization of the algorithm, has the objective of stabilizing the whole filter operation. The study begins with the analysis of the main algorithms for adaptive IIR filters, emphasizing the stability aspect. In this way, instabilities wventually occurred in the sequence of the work could be atributed only to the structure, avoiding any confusion with algorithm´s errors. After that, a new algorithm, that intend to stabilize the recursive structures of the digital IIR filters with a adaptable structure model, is proposed. The method is based on the error energy percentage variation, with real time calculation. Finally, some examples are presented, indicating the viability of the proposed method, showing additional benefits in the convergence speed and reduction of the polarization of the process parameters.
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Sundaralingam, Sathiaseelan. "Evolving optimal IIR and adaptive filters." Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300977.

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Hevey, Stephen J. "Adaptive Control using IIR Lattice Filters." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36736.

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This work is a study of a hybrid adaptive controller that blends fixed feedback control and adaptive feedback control techniques. This type of adaptive controller removes the requirement that information about the disturbance is known apriori. Additionally, the control structure is implemented in such a way that as long as the adaptive controller is stable during adaptation, the system consisting of the controller and plant remain stable. The objective is to design and implement an adaptive controller that damps the structural vibrations induced in a multi-modal structure. The adaptive controller utilizes an adaptive infinite impulse response lattice filter for improved damping over the fixed feedback controller alone. An adaptive finite impulse response LMS filter is also implemented for comparison of the ability for both algorithms to reject harmonic, narrow bandwidth and wide bandwidth disturbances. It is demonstrated that the lattice filter algorithm performs slightly better than the LMS filter algorithm in all three disturbance cases. The lattice filter also requires less than half the order of the LMS filter to get the same performance.
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Bentmar, Holgersson Sebastian. "Optimising IIR Filters Using ARM NEON." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20110.

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ARMs processorserie Cortex-A9 har stöd för SIMD-instruktioner med hjälp av NEON MPE. Detta innebär att processorn kan använda sig av vektor-instruktioner som kan utföra operationer på ett flertal element med varje instruktion. Målet med bruk av NEON MPE är att öka prestandan, men då man försöker optimera en speciell IIR-filtertyp som kallas för "biquads" kan man stöta på problem. Problemen med NEON-optimering av "biquads" beror på att endast fem operationer krävs för varje iteration och att behandling av IIR-filter kräver att man behandlar en sampel i taget eftersom varje behandlat sampels värde beror på tidigare behandlade samplar. Rapporten ger en kort beskrivning och genomgång av hur IIR-filter och NEON-optimering fungerar.För att analysera NEON-optimering av biquad-filter skapas fyra olika implementationer av en audioeffekt. De fyra implementationerna jämför prestandan hos flyttalsaritmetik, fixpunkts-aritmetik och NEON-optimering samt en version som implementerar både fixpunktsaritmetik och NEON-optimering. Problemen med optimering av biquad-filter med hjälp av NEON-instruktioner löses genom parallell behandling av ljudkanalerna. Eftersom kanalerna är självständiga kan man fördubbla prestanda genom att utföra varje operation på såväl höger- som vänsterkanal. Vidare prestandaförbättring ges även då effektiviteten hos minnesoperationer förbättras och med hjälp av fixpunkts-behandling.Resultaten visar att fixpunktsversionen som använder sig av NEON-instruktioner är snabbast, men flyttalsversionen med NEON-instruktioner är bara marginellt långsammare och dessutom enklare att implementera. Användandet av NEON-instruktioner förbättrar prestandan med mellan 1,7-2,8 gånger i de fall som testas.
The ARM Cortex-A9 CPU has a SIMD extension called NEON MPE. It allows for vector instructions that can perform operations on multiple elements in a single instruction. Whilst this usually improves performance, certain IIR filters called biquads pose problems as only five operations are necessary per sample and every iteration is dependent on the result of the previous result. A brief overview is given for IIR filters, the NEON extension and fixed-point processing.In order to analyse optimisation of biquad filters, an audio effect with four different implementations is produced, comparing results with/without fixed-point processing and with/without NEON optimisation. The problems introduced by the use of biquad filters are solved by running multiple channels in parallel. As the audio channels are independent, two samples can be calculated in parallel, which approximately doubles peformance. Further performance improvement is provided by improved memory operation efficiency and the use of fixed-point processing.The results show that the fixed-point NEON implementation is the fastest, however the floating-point NEON implementation is marginally slower but simpler to write. The use of NEON MPE improves performance by between 1.7 to 2.8 times in this case.
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McNally, Owen C. "VLSI systems for high performance IIR filter." Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333291.

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Ferro, Humberto Fioravante. "Hybrid convex combinations for IIR system identification." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-04072016-103658/.

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The low complexity of IIR adaptive filters (AFs) is specially appealing to realtime applications but some drawbacks have been preventing their widespread use so far. For gradient based IIR AFs, adverse operational conditions cause convergence problems in system identification scenarios: underdamped and clustered poles, undermodelling or non-white input signals lead to error surfaces where the adaptation nearly stops on large plateaus or get stuck at sub-optimal local minima that can not be identified as such a priori. Furthermore, the non-stationarity in the input regressor brought by the filter recursivity and the approximations made by the update rules of the stochastic gradient algorithms constrain the learning step size to small values, causing slow convergence. In this work, we propose IIR performance enhancement strategies based on hybrid combinations of AFs that achieve higher convergence rates than ordinary IIR AFs while keeping the stability.
A baixa complexidade dos filtros adaptativos (FAs) IIR é atrativa para aplicações em tempo real, mas certos inconvenientes têm impedido sua ampla utilização até agora. Para os FAs baseados no gradiente descendente, condições operacionais adversas suscitam problemas de convergência em cenários de identificação de sistemas: pólos subamortecidos ou agrupados, submodelagem ou sinais correlacionados originam superfícies de erro onde a adaptação desacelera em grandes planícies ou para em mínimos locais sub-ótimos que não podem ser identificados como tais a priori. Além disso, a não-estacionaridade do regressor de entrada causada pela recursividade do filtro e as aproximações feitas pelas regras de atualização dos algoritmos de gradiente estocástico restringem o passo de aprendizado a valores pequenos, retardando a convergência. Neste trabalho, propomos estratégias de aprimoramento de desempenho baseadas em combinações híbridas e estáveis de FAs que alcançam taxas de convergências mais altas do que FAs IIR comuns.
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Hall, M. C. "Adaptive IIR filter algorithms for real-time applications." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234800.

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Krukowski, Artur. "Flexible IIR digital filter design and multipath realisation." Thesis, University of Westminster, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322993.

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Guttman, Michael. "Sampled-data IIR filtering via time-mode signal processing." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86770.

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In this work, the design of sampled-data infinite impulse response filters based on time-mode signal processing circuits is presented. Time-mode signal processing (TMSP), defined as the processing of sampled analog information using time-difference variables, has become one of the more popular emerging technologies in circuit design. As TMSP is still relatively new, there is still much development needed to extend the technology into a general signal-processing tool. In this work, a set of general building block will be introduced that perform the most basic mathematical operations in the time-mode. By arranging these basic structures, higher-order time-mode systems, specifically, time-mode filters, will be realized. Three second-order time-mode filters (low-pass, band-reject, high-pass) are modeled using MATLAB, and simulated in Spectre to verify the design methodology. Finally, a damped integrator and a second-order low-pass time-mode IIR filter are both implemented using discrete components.
Dans ce mémoire, la conception de filtres de données-échantillonnées ayant une réponse impulsionnelle infinie basée sur le traitement de signal en mode temporel est présentée. Le traitement de signal dans le domaine temporel (TSDT), définie comme étant le traitement d'information analogique échantillonnée en utilisant des différences de temps comme variables, est devenu une des techniques émergentes de conception de circuits des plus populaires. Puisque le TSDT est toujours relativement récent, il y a encore beaucoup de développements requis pour étendre cette technologie comme un outil de traitement de signal général. Dans cette recherche, un ensemble de blocs d'assemblage capable de réaliser la plupart des opérations mathématiques dans le domaine temporel sera introduit. En arrangeant ces structures élémentaires, des systèmes en mode temporel d'ordre élevé, plus spécifiquement des filtres en mode temporel, seront réalisés. Trois filtres de deuxième ordre dans le domaine temporel (passe-bas, passe-bande et passe-haut) sont modélisés sur MATLAB et simulé sur Spectre afin de vérifier la méthodologie de conception. Finalement, un intégrateur amorti et un filtre passe-bas IIR de deuxième ordre en mode temporel sont implémentés avec des composantes discrètes.
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Books on the topic "IIR"

1

Phang, Khoman S. Adaptive microphone arrays using FIR and IIR filters. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1993.

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Adaptive IIR filtering in signal processing and control. New York: M. Dekker, 1995.

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T, Smith Mark J., and United States. National Aeronautics and Space Administration., eds. Spatially-varying IIR filter banks for image coding. [Washington, DC: National Aeronautics and Space Administration, 1992.

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T, Smith Mark J., and United States. National Aeronautics and Space Administration., eds. Spatially-varying IIR filter banks for image coding. [Washington, DC: National Aeronautics and Space Administration, 1992.

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T, Smith Mark J., and United States. National Aeronautics and Space Administration., eds. Spatially-varying IIR filter banks for image coding. [Washington, DC: National Aeronautics and Space Administration, 1992.

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Au, Dennis Kin-Wah. An integrated gDs-gRs based IIR filter. Ottawa: National Library of Canada, 1993.

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Owen, Bryn Robert. The design of delta-sigma modulator based IIR filters. Ottawa: National Library of Canada, 1993.

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Cryogenics 2000 (Conference) (2000 Prague). Cryogenics 2000: IIR international conference, Praha, Czech Republic, 2000 : proceedings. Edited by Chrz Václav and International Institute of Refrigeration. Praha: ICARIS Ltd., 2000.

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Christiansen, Momme. Büten dik än banen dik: 25 iir üt et laawen. Bräist: Ferlåch Nordfriisk Instituut, 1999.

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Billings, S. A. Adaptive noise cancellation for a class of nonlinear IIR filters. Sheffield: University of Sheffield, Dept. of Control Engineering, 1989.

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Book chapters on the topic "IIR"

1

Gooch, Jan W. "IIR." In Encyclopedic Dictionary of Polymers, 382. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6198.

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Bennett, Christopher L. "IIR filters." In Digital Audio Theory, 147–70. Abingdon, Oxon; New York, NY: Routledge, 2021.: Focal Press, 2020. http://dx.doi.org/10.4324/9780429297144-10.

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Ramirez, Paulo Sergio. "Adaptive IIR Filters." In The Kluwer International Series in Engineering and Computer Science, 361–422. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3637-3_9.

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Thyagarajan, K. S. "IIR Digital Filters." In Introduction to Digital Signal Processing Using MATLAB with Application to Digital Communications, 189–244. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76029-2_6.

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Diniz, Paulo Sergio Ramirez. "Adaptive IIR Filters." In Adaptive Filtering, 377–436. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4419-8660-3_9.

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Diniz, Paulo S. R. "Adaptive IIR Filters." In Adaptive Filtering, 307–46. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29057-3_10.

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Diniz, Paulo S. R. "Adaptive IIR Filters." In Adaptive Filtering, 411–66. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-1-4614-4106-9_10.

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Alessio, Silvia Maria. "IIR Filter Design." In Signals and Communication Technology, 263–367. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25468-5_8.

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Diniz, Paulo S. R. "Adaptive Iir Filters." In Adaptive Filtering, 1–55. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-68606-6_10.

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Zieliński, Tomasz P. "IIR Digital Filters." In Starting Digital Signal Processing in Telecommunication Engineering, 193–226. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-49256-4_8.

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Conference papers on the topic "IIR"

1

Ichige, Koichi, Sho Iwazaki, and Hiroyuki Arai. "IIR adaptive array: Spatial IIR filtering with DOA estimator." In 2011 IEEE Statistical Signal Processing Workshop (SSP). IEEE, 2011. http://dx.doi.org/10.1109/ssp.2011.5967646.

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"2005 IIR Attendees." In 2005 IEEE International Integrated Reliability Workshop. IEEE, 2005. http://dx.doi.org/10.1109/irws.2005.1609601.

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Berget, Gerd, and Andrew MacFarlane. "Experimental Methods in IIR." In CHIIR '19: Conference on Human Information Interaction and Retrieval. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3295750.3298939.

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Wu, C. M., M. Vishwanath, R. M. Owens, and M. J. Irwin. "A new blocked IIR algorithm." In Proceedings of ICASSP '93. IEEE, 1993. http://dx.doi.org/10.1109/icassp.1993.319448.

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Mitra, S., Y. Neuvo, and P. Vaidyanathan. "Complementary IIR digital filter banks." In IEEE International Conference on Acoustics, Speech, and Signal Processing. IEEE, 1985. http://dx.doi.org/10.1109/icassp.1985.1168359.

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Lesnikov, Vladislav, Tatiana Naumovich, and Alexander Chastikov. "Multiplierless IIR Filter Design Technique." In 2021 10th Mediterranean Conference on Embedded Computing (MECO). IEEE, 2021. http://dx.doi.org/10.1109/meco52532.2021.9460199.

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Burt, Phillip M. S. "Non-causal adaptive IIR filtering." In XXVII Simpósio Brasileiro de Telecomunicações. Sociedade Brasileira de Telecomunicações, 2009. http://dx.doi.org/10.14209/sbrt.2009.58183.

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Cain, Gerald D., Anush Yardim, and Fredric J. Harris. "Robust IIR Digital Filter Sharpening." In 2020 28th European Signal Processing Conference (EUSIPCO). IEEE, 2021. http://dx.doi.org/10.23919/eusipco47968.2020.9287752.

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Mosquera, C., F. Perez-Gonzalez, and R. Lopez-Valcarce. "Hyperstable polyphase adaptive IIR filters." In 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258). IEEE, 1999. http://dx.doi.org/10.1109/icassp.1999.758280.

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He, Ping, HongLi Chang, Han Gao, and ZiYi Wang. "Design of IIR digital filter." In 2017 6th International Conference on Computer Science and Network Technology (ICCSNT). IEEE, 2017. http://dx.doi.org/10.1109/iccsnt.2017.8343749.

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Reports on the topic "IIR"

1

Rawicz, H. C., M. A. Epstein, and J. A. Rajan. The Time Keeping System for GPS Block IIR. Fort Belvoir, VA: Defense Technical Information Center, December 1992. http://dx.doi.org/10.21236/ada518814.

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Daniel, Michael M., and Alan S. Willsky. Efficient Implementations of 2-D Noncasual IIR Filters. Fort Belvoir, VA: Defense Technical Information Center, March 1995. http://dx.doi.org/10.21236/ada459571.

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Tuqan, Jamal, and P. P. Vaidyanathan. Optimum Low Cost Two Channel IIR Orthonormal Filter Bank,. Fort Belvoir, VA: Defense Technical Information Center, April 1997. http://dx.doi.org/10.21236/ada323660.

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Cayton, T. E., D. M. Drake, K. M. Spencer, M. Herrin, T. J. Wehner, and R. C. Reedy. Description of the BDD-IIR: Electron and proton sensors on the GPS. Office of Scientific and Technical Information (OSTI), September 1998. http://dx.doi.org/10.2172/674727.

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Teytelman, Dmitry. Design and Implementation of IIR Algorithms for Control of Longitudinal Coupled-Bunch Instabilities. Office of Scientific and Technical Information (OSTI), May 2000. http://dx.doi.org/10.2172/763766.

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Fricke, A. K., and O. D. Crisalle. Development of viscometers for kraft black liquor. Final report - phases I, II, IIA, and III. Office of Scientific and Technical Information (OSTI), November 1999. http://dx.doi.org/10.2172/763247.

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Zhang, Yong-Hang. Multicolor (UV-IR) Photodetectors Based on Lattice-Matched 6.1 A II/VI and III/V Semiconductors. Fort Belvoir, VA: Defense Technical Information Center, August 2015. http://dx.doi.org/10.21236/ada622826.

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Hernández Licona, Gonzalo. Sistema de Evaluación y Monitoreo: Un Reto de Política Pública. Inter-American Development Bank, July 2004. http://dx.doi.org/10.18235/0007467.

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Перерва, Вікторія Вікторівна. Экологизация содержания профессиональной подготовки будущего учителя биологии. Семей, Казахстан, November 2020. http://dx.doi.org/10.31812/123456789/4227.

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Abstract:
Рассмотрены возможности экологизации содержания учебных дисциплин цикла профессиональной подготовки бакалавра специальности 014.05 Среднее образование (Биология и здоровье человека) на примере «Ботаники с основами геоботаники» (I-II курсы подготовки), «Основ сельского хозяйства» (III курс), «Физиологии растений» (III курс).
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Speck, James S. Development of III-Nitride Materials for IR Applications. Fort Belvoir, VA: Defense Technical Information Center, June 2008. http://dx.doi.org/10.21236/ada483731.

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