Bibliografías temáticas / Mismatched Filter

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Literatura académica sobre el tema "Mismatched Filter"

Autor: Grafiati
Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Mismatched Filter"

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Damtie, B. y M. S. Lehtinen. "Comparison of the performance of different radar pulse compression techniques in an incoherent scatter radar measurement". Annales Geophysicae 27, n.º 2 (17 de febrero de 2009): 797–806. http://dx.doi.org/10.5194/angeo-27-797-2009.

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Abstract. Improving an estimate of an incoherent scatter radar signal is vital to provide reliable and unbiased information about the Earth's ionosphere. Thus optimizing the measurement spatial and temporal resolutions has attracted considerable attention. The optimization usually relies on employing different kinds of pulse compression filters in the analysis and a matched filter is perhaps the most widely used one. A mismatched filter has also been used in order to suppress the undesirable sidelobes that appear in the case of matched filtering. Moreover, recently an adaptive pulse compression method, which can be derived based on the minimum mean-square error estimate, has been proposed. In this paper we have investigated the performance of matched, mismatched and adaptive pulse compression methods in terms of the output signal-to-noise ratio (SNR) and the variance and bias of the estimator. This is done by using different types of optimal radar waveforms. It is shown that for the case of low SNR the signal degradation associated to an adaptive filtering is less than that of the mismatched filtering. The SNR loss of both matched and adaptive pulse compression techniques was found to be nearly the same for most of the investigated codes for the case of high SNR. We have shown that the adaptive filtering technique is a compromise between matched and mismatched filtering method when one evaluates its performance in terms of the variance and the bias of the estimator. All the three analysis methods were found to have the same performance when a sidelobe-free matched filter code is employed.
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2

Rabaste, Olivier y Jonathan Bosse. "Robust Mismatched Filter for Off-Grid Target". IEEE Signal Processing Letters 26, n.º 8 (agosto de 2019): 1147–51. http://dx.doi.org/10.1109/lsp.2019.2923054.

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Ali, Weaam Talaat. "Detraction the Clutter for the Best Binary Phase Codes that Begot By Genetic Algorithm Using Wiener Filter". European Journal of Engineering and Technology Research 1, n.º 1 (27 de julio de 2018): 9–14. http://dx.doi.org/10.24018/ejeng.2016.1.1.59.

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This work illustrates the performance of detraction of clutter (unwanted echo signals, which mask the desired target signal and make difficult to detect the target) as a result of binary codes generating by genetic algorithm with length up to 105 bits, with use the minimum peak sidelobes as criteria for generation codes. Then, for further reduction of sidelobes, the mismatched optimum integrated sidelobe level filter (Wiener filter) is used with and without White Gaussian Noise. When the mismatched filter is used without noise, then the reduction of sidelobe level has the improvement of peak sidelobe level value on the average (4-15) dB, and for integrated sidelobe level value on the average (5-17) dB, which depends on the code length while it is accompanied by, signal to noise ratio loss level in range (0.2-1.4) dB. On other hand, when the mismatched filter is used with noise, the signal to noise ratio loss level is in range (0.2-1.4) dB.
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YOU, DATAO, JIQING HAN, TIERAN ZHENG y GUIBIN ZHENG. "SPARSE-BASED AUDITORY MODEL FOR ROBUST SPEAKER RECOGNITION". International Journal of Pattern Recognition and Artificial Intelligence 26, n.º 07 (noviembre de 2012): 1250015. http://dx.doi.org/10.1142/s0218001412500152.

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The mismatch between the training and the testing environments greatly degrades the performance of speaker recognition. Although many robust techniques have been proposed, speaker recognition in mismatch condition is still a challenge. To solve this problem, we propose a sparse-based auditory model as the front-end of speaker recognition by simulating auditory processing of speech signal. To this end, we introduce narrow-band filter-bank instead of the widely used wide-band filter-bank to simulate the basilar membrane filter-bank, use sparse representation as the approximation of basilar membrane coding strategy, and incorporate the frequency selectivity enhance mechanism between tectorial membrane and basilar membrane by practical engineering approximation. Compared with the standard Mel-frequency cepstral coefficient approach, our preliminary experimental results indicate that the sparse-based auditory model consistently improve the robustness of speaker recognition in mismatched condition.
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Rohling, H. y W. Plagge. "Mismatched-filter design for periodic binary phased signals". IEEE Transactions on Aerospace and Electronic Systems 25, n.º 6 (1989): 890–97. http://dx.doi.org/10.1109/7.40729.

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Liu, Aifei, Yee Siang Lim, Kah Chan Teh y Caicai Gao. "Mismatched filter for transmit waveform with frequency notches". IET Radar, Sonar & Navigation 12, n.º 3 (marzo de 2018): 332–40. http://dx.doi.org/10.1049/iet-rsn.2017.0350.

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Bi, Jingying y Hermann Rohling. "Complementary Binary Code Design based on Mismatched Filter". IEEE Transactions on Aerospace and Electronic Systems 48, n.º 2 (2012): 1793–97. http://dx.doi.org/10.1109/taes.2012.6178101.

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Wang, Tao, Zihao Chen, Zhiwei Cheng, Xiaobo Deng, Junli Liang y Jianchao Bai. "Joint design of mismatched filter and unimodular transmit waveform". Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 39, n.º 6 (diciembre de 2021): 1349–55. http://dx.doi.org/10.1051/jnwpu/20213961349.

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To improve the receiver performance, unimodular transmit waveform and mismatched filter are jointly designed by using the alternating direction method of multipliers (ADMM). A series of auxiliary variables are introduced to decouple the variables in objective function and additional constrains. Denominator normalization(fractional programming technology) and step function are applied to obtain optimal solution from some subproblems. For given transmit waveform, same-length mismatched filter is designed in receiver. The low sidelobe level performance of the present methods are illustrated with the simulation results.
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Cui, Jiadong, Wenhao Xing, Huibin Qin, Yongzhu Hua, Xin Zhang y Xinran Liu. "Research on Permanent Magnet Synchronous Motor Control System Based on Adaptive Kalman Filter". Applied Sciences 12, n.º 10 (13 de mayo de 2022): 4944. http://dx.doi.org/10.3390/app12104944.

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A sensorless control system of a permanent magnet synchronous motor based on an extended Kalman filter (EKF) algorithm faces problems with inaccurate or mismatched process noise statistics. This problem affects the performance of the filter, resulting in an inaccurate estimation of motor speed. To address the above problem, this paper proposes a parameter-adaptive Kalman filter algorithm that does not depend on precise noise system covariance. This method can significantly reduce the negative impact of the noise statistical mismatch on motor speed estimation. In addition, the method uses adaptive covariance prediction and removes the original covariance checks in the EKF, thus reducing the calculation burden. The simulation results show that, compared with the traditional EKF algorithm, the algorithm proposed in this article can effectively reduce the steady-state jitter and improve the filtering adaptability and calculation accuracy.
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Wang, H., J. Wang y L. Zhong. "Mismatched filter for analogue TV-based passive bistatic radar". IET Radar, Sonar & Navigation 5, n.º 5 (2011): 573. http://dx.doi.org/10.1049/iet-rsn.2010.0136.

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Tesis sobre el tema "Mismatched Filter"

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Chatzitheodoridi, Maria-Elisavet. "Processing Optimization for Continuous Phase Modulation-based Joint Radar-Communication System : Application on Imaging Radar". Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPAST022.

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En raison de la croissance continue des applications électromagnétiques, le spectre devient de plus en plus encombré. Une solution possible à ce problème consiste à créer des systèmes radar-communication joints qui utilisent la même bande passante pour réaliser les deux applications. Dans cette thèse, nous nous intéressons à un système exploitant une forme d'onde issue du monde des communications pour réaliser conjointement de l'imagerie radar et un transfert d'information. Pour cela, parmi la multitude de codes existants, nous avons choisi d'utiliser des codes modulés continument en phase CPM, et plus particulièrement une sous-famille appelée Continuous Phase Frequency Shift-Keying codes. Les propriétés de ceux-ci, notamment en ce qui concerne l'occupation spectrale, sont d'abord étudiées et comparées à d'autres codes représentatifs des communications. Cependant, ces formes d'ondes présentent des qualités de compression dégradées par rapport au chirp habituellement utilisé en radar. En particulier les lobes secondaires résultant de la compression avec le filtre adapté sont plus élevés, nuisant à la qualité de l'image SAR résultante. Un filtre désadapté qui minimise l'énergie des lobes secondaires est proposé, ainsi qu'un algorithme rapide qui fournit les filtres pour tous les signaux émis en un temps de calcul raisonnable. Ce filtre désadapté est amélioré pour pouvoir traiter des valeurs inconnues de décalage Doppler ou de retard hors grille qui peuvent s'appliquer sur le signal reçu. De tels problèmes peuvent être généralisés à d'autres applications radar que le SAR. Une fois le choix de la méthode de compression d'impulsion établi, une évaluation des résultats est proposée. D'une part, des images SAR re-synthétisées sont générées, reconstruites à partir de données réelles basées sur le chirp, en utilisant des codes modulés continument et des filtres désadaptés, et différents outils de comparaison sont utilisés pour s'assurer de leurs performances. D'autre part, des données réelles sont acquises dans un cadre ISAR, afin de valider notre système dans un contexte réaliste. Finalement, nous pouvons apporter une réponse positive à la question suivante : pouvons-nous créer un système conjoint SAR-communication qui transmet des informations et fournit des images radar de haute qualité ?
Due to the continuous growth of electromagnetic applications, the spectrum gets more and more congested. A possible solution to this problem is the creation of joint radar-communication systems, because they can alleviate the spectrum occupancy by using the same bandwidth to perform both applications. In this thesis, a joint Synthetic Aperture Radar (SAR)-Communication system based on a communication waveform is considered. To do so, among all the existing codes, we chose Continuous Phase Modulated codes (CPM), and more specifically a sub-family called Phase Frequency Shift-Keying codes (CPFSK). Their properties, in particular the spectral occupation, are first studied and compared to other well-known communication codes. However, these waveforms present degraded compression qualities when compared to the usual chirp used for radars. More specifically, the sidelobes generated from the Matched Filter compression are higher, and thus deteriorate the resulting SAR image. The mismatched filter that minimizes the sidelobe level is proposed along with a fast algorithm that provides the filters for all the transmitted signals during an acceptable computational cost. This mismatched filter is further improved so that it can deal with unknown parameters. More precisely, if unknown Doppler shift or off-grid delay values are applied to the received signal, then an improved mismatched filter is provided. Such a problem can be extended to other radar applications. Once the range compression method choice is established, an evaluation of the results is proposed. On the one hand, re-synthesized SAR images are generated, reconstructed from real chirp-based data, using CPM codes and mismatched filters, and different comparison tools to ensure their performance.On the other hand, real data are acquired in an ISAR framework, in order to validate our system in a realistic context. Finally, we can provide a positive answer to the question: can we create a joint SAR-communication system that transmits information and provides an image of good radar quality?
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Löwenborg, Per. "Asymmetric filter banks for mitigation of mismatch errors in high-speed analog-to-digital converters /". Linköping : Univ, 2002. http://www.bibl.liu.se/liupubl/disp/disp2002/tek787s.pdf.

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Nguyen, Hien. "Robust Steering Vector Mismatch Techniques for Reduced Rank Adaptive Array Signal Processing". Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29238.

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The research presented in this dissertation is on the development of advanced reduced rank adaptive signal processing for airborne radar space-time adaptive processing (STAP) and steering vector mismatch robustness. This is an important area of research in the field of airborne radar signal processing since practical STAP algorithms should be robust against various kinds of mismatch errors. The clutter return in an airborne radar has widely spread Doppler frequencies; therefore STAP, a two-dimensional adaptive filtering algorithm is required for effective clutter and jamming cancellation. Real-world effects in nonhomogeneous environments increase the number of adaptive degrees of freedom required to adequately suppress interference. The increasing computational complexity and the need to estimate the interference from a limited sample support make full rank STAP impractical. The research presented here shows that the reduced rank multistage Wiener filter (MWF) provides significant subspace compression better than any previous techniques in a nonhomogeneous environment. In addition, the impact of steering vector mismatch will also be examined on the MWF. In an airborne radar environment, it is well known that calibration errors and steering vector mismatch can seriously degrade adaptive array performance and result in signal cancellation. These errors can be caused by many non-ideal factors such as beam steering angle errors, multipath propagation, and phase errors due to array imperfections. Since the MWF centrally features the steering vector on its formulation, it is important to assess the impact of steering vector mismatch. In this dissertation, several novel techniques for increasing robustness are examined and applied to the MWF. These include derivative constraints, quiescent pattern control (QPC) techniques, and covariance matrix tapers (CMT). This research illustrates that a combination of CMT and QPC, denoted CMTQ, is very effective at mitigating the impact of steering vector mismatch. Use of CMTQ augmentation provides the steering vector mismatch robustness that we desire while improving the reduced-rank and reduced sample characteristics of the MWF. Results using Monte Carlo simulations and experimental Multichannel Airborne Radar Measurements (MCARM) data confirm that the use of CMTQ gives superior performance to steering vector errors at a much reduced rank and sample support as compared to conventional techniques.
Ph. D.
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Aktop, Onur. "Optimization Of Doppler Processing By Using Bank Of Matched Filters". Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12606420/index.pdf.

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In radars, matched filters are used in the receiver of the system. Since the target velocity is not known a priori, degradation occurs due to mismatch of the return signal and the matched filter. The performance of the radar can be improved by using a bank of matched filters. The first topic investigated in this work is optimization of the bank of matched filter structure. Two methods are proposed for the design of the parallel filter structure and computations are performed with both methods. The output signal of a radar receiver filter consists not only of the main peak from the target but also of range sidelobes. In a multi-target radar environment, the sidelobes of one large target may appear as a smaller target at another range, or the integrated sidelobes from targets or clutter may mask all the information of another target. The second part of this thesis discusses the methods for decreasing the sidelobe level of the receiver output. Two methods are studied for this purpose. The first is the classical amplitude weighting and the second is the use of an inverse filter that minimizes total sidelobe energy. Both methods decrease the sidelobe levels while bringing a mismatch loss and main peak broadening. For the inverse filter case it is observed that the effect of inverse filter becomes evident as the filter length is increased beyond some point. Finally, the effects of quantization on video signal and the receiver filter coefficients are evaluated. It is observed that 16 bits quantization is sufficient for all kinds of receiver filters tested.
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Sigron, Dario. "Fehlende Fristen- und Währungskongruenz als Ursache von Finanzmarktkrisen in Schwellenländern Theoretischer Hintergrund und wirtschaftspolitische Handlungsalternativen /". St. Gallen, 2008. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/00287565001/$FILE/00287565001.pdf.

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Steckenrider, John Josiah. "Simultaneous Estimation and Modeling of State-Space Systems Using Multi-Gaussian Belief Fusion". Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/97583.

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This work describes a framework for simultaneous estimation and modeling (SEAM) of dynamic systems using non-Gaussian belief fusion by first presenting the relevant fundamental formulations, then building upon these formulations incrementally towards a more general and ubiquitous framework. Multi-Gaussian belief fusion (MBF) is introduced as a natural and effective method of fusing non-Gaussian probability distribution functions (PDFs) in arbitrary dimensions efficiently and with no loss of accuracy. Construction of some multi-Gaussian structures for potential use in MBF is addressed. Furthermore, recursive Bayesian estimation (RBE) is developed for linearized systems with uncertainty in model parameters, and a rudimentary motion model correction stage is introduced. A subsequent improvement to motion model correction for arbitrarily non-Gaussian belief is developed, followed by application to observation models. Finally, SEAM is generalized to fully nonlinear and non-Gaussian systems. Several parametric studies were performed on simulated experiments in order to assess the various dependencies of the SEAM framework and validate its effectiveness in both estimation and modeling. The results of these studies show that SEAM is capable of improving estimation when uncertainty is present in motion and observation models as compared to existing methods. Furthermore, uncertainty in model parameters is consistently reduced as these parameters are updated throughout the estimation process. SEAM and its constituents have potential uses in robotics, target tracking and localization, state estimation, and more.
Doctor of Philosophy
The simultaneous estimation and modeling (SEAM) framework and its constituents described in this dissertation aim to improve estimation of signals where significant uncertainty would normally introduce error. Such signals could be electrical (e.g. voltages, currents, etc.), mechanical (e.g. accelerations, forces, etc.), or the like. Estimation is accomplished by addressing the problem probabilistically through information fusion. The proposed techniques not only improve state estimation, but also effectively "learn" about the system of interest in order to further refine estimation. Potential uses of such methods could be found in search-and-rescue robotics, robust control algorithms, and the like. The proposed framework is well-suited for any context where traditional estimation methods have difficulty handling heightened uncertainty.
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Vengattaramane, Kameswaran. "Efficient Reconstruction of Two-Periodic Nonuniformly Sampled Signals Applicable to Time-Interleaved ADCs". Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6253.

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Nonuniform sampling occurs in many practical applications either intentionally or unintentionally. This thesis deals with the reconstruction of two-periodic nonuniform signals which is of great importance in two-channel time-interleaved analog-to-digital converters. In a two-channel time-interleaved ADC, aperture delay mismatch between the channels gives rise to a two-periodic nonuniform sampling pattern, resulting in distortion and severely affecting the linearity of the converter. The problem is solved by digitally recovering a uniformly sampled sequence from a two-periodic nonuniformly sampled set. For this purpose, a time-varying FIR filter is employed. If the sampling pattern is known and fixed, this filter can be designed in an optimal way using least-squares or minimax design. When the sampling pattern changes now and then as during the normal operation of time-interleaved ADC, these filters have to be redesigned. This has implications on the implementation cost as general on-line design is cumbersome. To overcome this problem, a novel time-varying FIR filter with polynomial impulse response is developed and characterized in this thesis. The main advantage with these filters is that on-line design is no longer needed. It now suffices to perform only one design before implementation and in the implementation it is enough to adjust only one variable parameter when the sampling pattern changes. Thus the high implementation cost is decreased substantially.

Filter design and the associated performance metrics have been validated using MATLAB. The design space has been explored to limits imposed by machine precision on matrix inversions. Studies related to finite wordlength effects in practical filter realisations have also been carried out. These formulations can also be extended to the general M - periodic nonuniform sampling case.

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Pelteku, Altin E. "Adaptive Suppression of Interfering Signals in Communication Systems". Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/138.

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The growth in the number of wireless devices and applications underscores the need for characterizing and mitigating interference induced problems such as distortion and blocking. A typical interference scenario involves the detection of a small amplitude signal of interest (SOI) in the presence of a large amplitude interfering signal; it is desirable to attenuate the interfering signal while preserving the integrity of SOI and an appropriate dynamic range. If the frequency of the interfering signal varies or is unknown, an adaptive notch function must be applied in order to maintain adequate attenuation. This work explores the performance space of a phase cancellation technique used in implementing the desired notch function for communication systems in the 1-3 GHz frequency range. A system level model constructed with MATLAB and related simulation results assist in building the theoretical foundation for setting performance bounds on the implemented solution and deriving hardware specifications for the RF notch subsystem devices. Simulations and measurements are presented for a Low Noise Amplifer (LNA), voltage variable attenuators, bandpass filters and phase shifters. Ultimately, full system tests provide a measure of merit for this work as well as invaluable lessons learned. The emphasis of this project is the on-wafer LNA measurements, dependence of IC system performance on mismatches and overall system performance tests. Where possible, predictions are plotted alongside measured data. The reasonable match between the two validates system and component models and more than compensates for the painstaking modeling efforts. Most importantly, using the signal to interferer ratio (SIR) as a figure of merit, experimental results demonstrate up to 58 dB of SIR improvement. This number represents a remarkable advancement in interference rejection at RF or microwave frequencies.
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Sarkar, Indranil. "Computationally efficient mismatched filter design for pulse compression codes". 2007. http://proquest.umi.com/pqdweb?did=1515415281&sid=15&Fmt=2&clientId=39334&RQT=309&VName=PQD.

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Thesis (Ph.D.)--State University of New York at Buffalo, 2007.
Title from PDF title page (viewed on Feb. 13, 2009) Available through UMI ProQuest Digital Dissertations. Thesis adviser: Fam, Adly T. Includes bibliographical references.
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Steffener, Jason. "Characterization of mismatch between behavioral stimuli and FRMI data using the Kalman filter". Thesis, 2005. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2005-086.

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Libros sobre el tema "Mismatched Filter"

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Zhang, Bo. Delta-sigma modulators employing continuous-time circuits and mismatch-shaped DACs. 1996.

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Zhang, Bo. Delta-sigma modulators employing continuous-time circuits and mismatch-shaped DACs. 1996.

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Pievani, Telmo. Imperfection. The MIT Press, 2022. http://dx.doi.org/10.7551/mitpress/14573.001.0001.

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In praise of imperfection: how life on our planet is a catalog of imperfections, errors, alternatives, and anomalies. In the beginning, there was imperfection, which became the source of all things. Anomalies and asymmetries caused planets to take shape from the bubbling void and sent light into darkness. Life on earth is a catalog of accidents, alternatives, and errors that turned out to work quite well. In this book, Telmo Pievani shows that life on our planet has flourished and survived not because of its perfection but despite (and perhaps because of) its imperfection. He begins his story with the disruption-filled birth of the universe and proceeds through the random DNA copying errors that fuel evolution, the transformations of advantages into handicaps by natural selection, the anatomical and functional jumble that is the human brain, and our many bodily mismatches. Along the way, Pievani tells readers about the Irish elk (incidentally, neither Irish nor elk), whose enormous antlers serve to illustrate the first two laws of imperfection; the widespread dissemination of costly or useless traits; and the neuroimperfection of the human brain—“a frozen accident of evolution that was not designed from scratch,” as Pievani calls it. He sizes up the alleged perfection of the human body, asking, for example, if everything in our bodies serves a purpose, why do we have appendixes? Why bipedalism, with the inevitable back pain that results? In this fascinating account, Pievani offers the first comprehensive explanatory theory for the ubiquity of imperfection.
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Capítulos de libros sobre el tema "Mismatched Filter"

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Le, Van-Tien, Huu-Cong Vu y Hong-Hee Lee. "An Enhanced Finite-Control-Set Model Predictive Control Strategy for PWM Rectifiers with Filter Inductance Mismatch". En Intelligent Computing Theories and Application, 161–71. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84529-2_14.

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Bui, Thi Mai Anh y Nhat Hai Nguyen. "Adaptive Ranking Relevant Source Files for Bug Reports Using Genetic Algorithm". En Frontiers in Artificial Intelligence and Applications. IOS Press, 2021. http://dx.doi.org/10.3233/faia210042.

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Precisely locating buggy files for a given bug report is a cumbersome and time-consuming task, particularly in a large-scale project with thousands of source files and bug reports. An efficient bug localization module is desirable to improve the productivity of the software maintenance phase. Many previous approaches rank source files according to their relevance to a given bug report based on simple lexical matching scores. However, the lexical mismatches between natural language expressions used to describe bug reports and technical terms of software source code might reduce the bug localization system’s accuracy. Incorporating domain knowledge through some features such as the semantic similarity, the fixing frequency of a source file, the code change history and similar bug reports is crucial to efficiently locating buggy files. In this paper, we propose a bug localization model, BugLocGA that leverages both lexical and semantic information as well as explores the relation between a bug report and a source file through some domain features. Given a bug report, we calculate the ranking score with every source files through a weighted sum of all features, where the weights are trained through a genetic algorithm with the aim of maximizing the performance of the bug localization model using two evaluation metrics: mean reciprocal rank (MRR) and mean average precision (MAP). The empirical results conducted on some widely-used open source software projects have showed that our model outperformed some state of the art approaches by effectively recommending relevant files where the bug should be fixed.
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Patel, Satyanarayan. "Thermomechanical Analysis of Ceramic Composites Using Object Oriented Finite Element Analysis". En Simulation Modeling. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.100190.

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This chapter discussed the object oriented finite element (OOF2)-based studies for ceramic composites. OOF2 is an effective method that uses an actual microstructure image of the material/composites for simulation. The effect of filler inclusions on the thermomechanical properties (coefficient of thermal expansion, thermal conductivity, Young’s modulus, stress and strain) is discussed. For this purpose, various ceramics composites (thermal barrier coating and ferroelectric based) are considered at homogeneous and heterogeneous temperature/stress conditions. The maximum stress is found at the interface of the filler/matrix due to their mismatch of thermal expansion coefficient. Further, residual and localized interface stress distributions are evaluated to analyze the composite’s failure behavior. The possible integration of OOF2 with other simulation techniques is also explored.
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A. Rmila, Salahaldein. "Automatic Current Sharing Mechanism in Two-phase Series Capacitor Buck DC-DC Converter (2-pscB)". En Power Electronics, RF, and Microwave Engineering [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.107975.

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In this chapter, we introduce the concept of the Inherited Automatic Current Sharing Mechanism (ACSM) in a two-phase series capacitor buck topology (2-pscB). This topology was introduced to power laptops as low-voltage and high-current Voltage Regulator Modules as well as non-isolated Point-of-Load converters (Vin < 12 V). To satisfy the converter stability, a state-space modeling technique of switching intervals coupled with parasitic component linearization is developed. Due to the series capacitor charging period miscalculation, the applicability of the ACSM of 2-pscB switching topology for high-power electronic applications is still very limited. Inserting a series capacitor between power switches of phase A increases loop parasitic inductance, introduces a time delay mismatch between the gate voltages of the two switches, and causes interference with the synchronization of the dead time between both phases of 2-pscB converters since the phase B has no series capacitor. This mismatch reduces the heat distribution efficiency and lifetime. As such, a complete model study delivered by the converter is required to design a robust controller. Driven to explore the series capacitor voltage feedback mechanism, frequency analysis of transfer functions, and filter behavior with experimental prototype examples (Vin < 120 V) have been presented for the first time to demonstrate the theoretical analysis. Obtained efficiency was up to 94.9% at full load.
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Eggers, Scott D. y Eduardo E. Benarroch. "Special Somatic Sensory Afferent Systems Overview". En Mayo Clinic Neurology Board Review, editado por Kelly D. Flemming, 34–40. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780197512166.003.0005.

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The special somatic sensory afferent systems include the auditory, vestibular, and visual systems. Auditory and vestibular afferent information is received by cranial nerve VIII, which projects to central pathways. Cranial nerve II carries afferent visual information to central pathways. This chapter reviews the receptors and structural components of these special somatic sensory afferent systems. The ossicular chain (malleus, incus, and stapes) within the air-filled middle ear serves as a transformer that bridges the impedance mismatch between sound vibrations in air on the large tympanic membrane and the resulting vibrations onto the small stapedial footplate.
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Boobalan, P., K. Gunasekar, P. Thirumoorthy y J. Senthil. "An Introduction to Deepfakes on Cryptographic Image Security". En Advances in Multimedia and Interactive Technologies, 72–81. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-6060-3.ch006.

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The level of protection afforded to the encryption key is directly proportional to the level of security afforded to the data being encrypted. Data transmission via networks is the primary application for encryption use. There have been many different methods developed and put into use, all of which are utilized for safeguarding sensitive image data from any kind of illegal access. Text, audio, video, graphics, and still photos are some of the numerous types of data that can be included within multimedia files. A rise in the use of multimedia content transmitted over the internet has resulted in an increase in the sortage for the content. The vast majority of current encryption algorithms are typically reserved for use with informations since they are mismatched with digitalized data. A block-based transformation technique was utilized for this project.
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Hart, Allan M. "Hibernate". En Handbook of Research on Modern Systems Analysis and Design Technologies and Applications, 433–68. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-887-1.ch025.

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This chapter presents a brief overview of the object/relational mapping service known as Hibernate. Based on work provided in the book Java Persistence with Hibernate, it is argued that the paradigm mismatch problem consists of five problems: the problem of granularity, the problem of subtypes, the problem of identity, the problem of associations, and the problem of data navigation. It is argued that Hibernate, if it is to be considered a successful object/relational mapping service, must solve the paradigm mismatch problem and, hence, each of the five problems noted above. A simplified version of an order entry system is presented together with the mapping files required to store persistent objects to a database. Examples are given for one-to-one, one-to-many, and many-to-many mappings. The distinction between value and entity types is explained and the mapping technique required for value types is introduced into the order entry system application. The n+1 selects problem is explained and a strategy for solving that problem using Hibernate’s support for lazy, batch, and eager fetching strategies is discussed.
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Téllez-Limón, Ricardo y Rafael Salas-Montiel. "Nanowires Integrated to Optical Waveguides". En Nanowires - Recent Progress. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95689.

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Chip-scale integrated optical devices are one of the most developed research subjects in last years. These devices serve as a bridge to overcome size mismatch between diffraction-limited bulk optics and nanoscale photonic devices. They have been employed to develop many on-chip applications, such as integrated light sources, polarizers, optical filters, and even biosensing devices. Among these integrated systems can be found the so-called hybrid photonic-plasmonic devices, structures that integrate plasmonic metamaterials on top of optical waveguides, leading to outstanding physical phenomena. In this contribution, we present a comprehensive study of the design of hybrid photonic-plasmonic systems consisting of periodic arrays of metallic nanowires integrated on top of dielectric waveguides. Based on numerical simulations, we explain the physics of these structures and analyze light coupling between plasmonic resonances in the nanowires and the photonic modes of the waveguides below them. With this chapter we pretend to attract the interest of research community in the development of integrated hybrid photonic-plasmonic devices, especially light interaction between guided photonic modes and plasmonic resonances in metallic nanowires.
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Actas de conferencias sobre el tema "Mismatched Filter"

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Akdemir, Safak Bilgi y Cagatay Candan. "Mismatched filter design in MIMO radar". En 2012 20th Signal Processing and Communications Applications Conference (SIU). IEEE, 2012. http://dx.doi.org/10.1109/siu.2012.6204508.

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Pe'er, Uri y Ning Yang. "Choosing the Optimal Parameters for Mismatched Filter Design". En 2022 IEEE Radar Conference (RadarConf22). IEEE, 2022. http://dx.doi.org/10.1109/radarconf2248738.2022.9764253.

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Wang, Yan, Yuliang He, Jin Fu, Guolong Liang y Nan Zou. "Optimal Mismatched Filter Design with a Controllable Maximum Loss". En OCEANS 2018 MTS/IEEE Charleston. IEEE, 2018. http://dx.doi.org/10.1109/oceans.2018.8604553.

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Xu, Leilei, Hongwei Liu, Kuiying Yin, Huikai Zang, Shenghua Zhou y Hongxian Wang. "Joint design of phase coded waveform and mismatched filter". En 2015 IEEE Radar Conference. IEEE, 2015. http://dx.doi.org/10.1109/radarconf.2015.7411849.

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Hamada, Kazutaka y Masanori Shinriki. "Mismatched filter for binary code compressed to several chips". En 2008 International Symposium on Information Theory and Its Applications (ISITA). IEEE, 2008. http://dx.doi.org/10.1109/isita.2008.4895603.

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Bell, Thomas. "Closed-form mismatched filter synthesis for complementary range response". En SPIE Defense + Security, editado por Edmund Zelnio y Frederick D. Garber. SPIE, 2017. http://dx.doi.org/10.1117/12.2262592.

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Aittomaki, Tuomas y Visa Koivunen. "Mismatched filter design for radar waveforms by semidefinite relaxation". En ICASSP 2015 - 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2015. http://dx.doi.org/10.1109/icassp.2015.7178469.

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Kulpa, Janusz S. "Mismatched filter for range sidelobes suppression of pseudo-noise signals". En 2015 Signal Processing Symposium (SPSympo). IEEE, 2015. http://dx.doi.org/10.1109/sps.2015.7168290.

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Rabaste, Olivier y Laurent Savy. "Mismatched filter optimization via quadratic convex programming for radar applications". En 2014 International Radar Conference (Radar). IEEE, 2014. http://dx.doi.org/10.1109/radar.2014.7060333.

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Gao, Junchao, Jun Wang y Zhufeng Lai. "GPU-accelerated mismatched filter for analog TV-based passive radar". En 2016 CIE International Conference on Radar (RADAR). IEEE, 2016. http://dx.doi.org/10.1109/radar.2016.8059132.

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Informes sobre el tema "Mismatched Filter"

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Comparison of mechanical behavior between longitudinal lap-welded joints and transverse fillet welded joints of high strength steel. The Hong Kong Institute of Steel Construction, agosto de 2022. http://dx.doi.org/10.18057/icass2020.p.302.

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Mechanical behavior of twenty-eight longitudinal lap-welded joints made of high strength steels (HSS) under tension load was investigated by experimental study. Weaknesses due to traditional deformation measurements for fillet welded joints can be perfectly solved by digital image correlation techniques (DIC). The effect of parameters (e.g. weld size, weld length and mismatch ratio) on mechanical properties (e.g. ultimate strength, failure modes, weld ductility and fracture angle) of longitudinal fillet welds and transverse fillet welds, which was introduced in detail in previous work by the authors, were compared. Generally, because of the difference on the combination of shear force and tension force, the fracture angle of longitudinal welded specimens (around 50) were much more divergent from transverse welded specimens (around 20) even though both of them failed at welded zone (welded zone only refers to weld metal in this paper), resulting that the mean strength of longitudinal welded specimens were only 0.58 time of transverse welded specimens. Conversely, the mean deformation capacity of longitudinal welded specimens was almost 4.0 times of transverse welded specimens. Moreover, it was confirmed that the predicted loads of EC3 and AISC Specification were close and slightly conservative for all specimens.
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