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Journal articles on the topic 'Bank of weight filters'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Hussain, Ghasan Ali. "DESIGN OF PARALLEL COUPLED MICROSTRIP BAND-PASS FILTER." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 15, no. 5 (2016): 6768–75. http://dx.doi.org/10.24297/ijct.v15i5.1650.

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Filters occupy important acts in several Radio Frequency microwave applications. Several applications such as wireless communications still challenge RF/microwave filters with strict requirements such as smaller size, higher performance, lighter weight, and lower cost. Microstrip Filters for RF/Microwave Applications offers a unique and comprehensive treatment of RF/microwave filters based on the microstrip structure. One of the most common methods in designing microwave filters is using of parallel-coupled microstrip. In this paperÂ simulate and fabricate by using Ansoft Designer a two resona

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Tucker, Jeff, Kathleen E. Wage, John R. Buck, and Lora J. Van Uffelen. "Performance weighted blended spectrogram." Journal of the Acoustical Society of America 157, no. 3 (2025): 2106–16. https://doi.org/10.1121/10.0036216.

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Spectrograms are used for time-frequency analysis and as preprocessing for signal classifiers and other algorithms. The conventional spectrogram is a tapered short-time Fourier transform, equivalent to a bank of bandpass filters. The taper defines filter-bank characteristics such as bandwidth and sidelobe levels. Although the conventional spectrogram uses minimal computational resources, its design requires a compromise between resolution and interference suppression. Adaptive spectrogram algorithms adjust the filter-bank based on incoming data, thereby allowing different bandwidth/sidelobe tr

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Gohil, Bhumikaba, and Khyati Chavda. "Design & Simulation of S Band Planar Microwave Filter for Wireless Application." IOP Conference Series: Materials Science and Engineering 1187, no. 1 (2021): 012016. http://dx.doi.org/10.1088/1757-899x/1187/1/012016.

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Abstract Reducing the size of today’s wireless communication systems has become an important criterion in filter design with minimal possible value of filter parameters. To achieve this goal in wireless communication system, filter design is the most important part of the signal transmission process. Conventional filters are very important for modern wireless communication systems as they do not provide the desired miniaturization and results. Recently, using metamaterials and dielectric resonators, the filter size has been drastically reduced to a very small size for practical applications. T

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Sorkin, A. А., A. V. Minakov, and Yu P. Salomatov. "Waveguide Quarter-Wave Transverse Ridge Resonators on Quasi-TEM Wave and Filters on Their Basis." Journal of the Russian Universities. Radioelectronics 28, no. 3 (2025): 95–105. https://doi.org/10.32603/1993-8985-2025-28-3-95-105.

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Introduction. In modern communication systems, the requirements imposed on the weight, size, and frequency characteristics of filters in the input and output paths of antenna-feeder devices (AFD) are becoming increasingly stringent. Taking this into account, we investigate a transverse waveguide ridge resonator of a quarter-wave structure. The use of a quarterwave resonator, rather than a half-wave structure, allows the width and length of the filter to be reduced. The influence of various resonator parameters on its resonant frequency is demonstrated. The dependence of the loaded Q-factor on

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Lubey, Daniel P., and Todd A. Ely. "Anomaly Detection in Autonomous Deep-Space Navigation via Filter Bank Gating Networks." Applied Sciences 12, no. 21 (2022): 11161. http://dx.doi.org/10.3390/app122111161.

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This study investigates methods for autonomous navigation of a deep-space spacecraft where one-way radiometric and on-board optical information are fused to create a fully informed state estimate. The specific focus is on using filter bank methods (i.e., Multiple Model Estimation [MME] and Mixture of Experts [MoE]) to detect when measurement and/or dynamical mis-modeling occurs. We develop a new χ2-based gating network for a filter bank that may be used to identify poorly performing filters (i.e., those with low weights), which may be used as a signal for mis-modeling in the system. In additio

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Barmashe, Pravin, and D. K. Srivastava. "Design and Optimization of Tri-Band Open Loop Resonator Filter for BT, WiMAX, WLAN and Wi-Fi Applications." International Journal of Emerging Technology and Advanced Engineering 12, no. 4 (2022): 181–89. http://dx.doi.org/10.46338/ijetae0422_22.

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The consumer wireless frequency spectrum is getting denser and overlapping so may signals can cause interference and less data speed. There is need to either switch to new channel or to use newer technologies available. As per FCC new 6GHz band is now open for WLAN & Wi-Fi networks and to filter out other signals a microwave filter could the best mate. This paper proposed a tri-band microstrip filter having rectangular resonator with open loop has been evaluated. Because of its tiny size, lighter weight, cheaper cost, and superior performance, microstrip filters are often chosen over lumpe

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7

Shieh, Chun-Ping, Shih-Hung Yang, Yu-Shun Liu, et al. "Simultaneously Spatiospectral Pattern Learning and Contaminated Trial Pruning for Electroencephalography-Based Brain Computer Interface." Symmetry 12, no. 9 (2020): 1387. http://dx.doi.org/10.3390/sym12091387.

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Electroencephalography (EEG)-based brain computer interfaces (BCIs) translate motor imagery commands into the movements of an external device (e.g., a robotic arm). The automatic design of spectral and spatial filters is a challenging task, as the frequency bands of the spectral filters must be predefined by previously published studies and given that they may be affected during trials by artifacts and improper motor imagery (MI). This study aimed to eliminate the contaminated trials automatically during classifier training, and to simultaneously learn the spectral and spatial patterns without

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Kumari, Poonam, Saif Ahamad, and Imran Ullah Khan. "FIR FILTER DESIGN WITH INERTIA WEIGHT AND COMPRESSION FACTOR APPROACH USING ADVANCED OPTIMIZATION TECHNIQUES." International Research Journal of Computer Science 8, no. 3 (2021): 62–67. http://dx.doi.org/10.26562/irjcs.2021.v0803.004.

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This paper includes the design of Finite impulse response filter with inertia weight and compression factor approach. The objective function of filter design involves accurate control of various parameters of frequency spectrum and is thus highly non-uniform, non-linear, non-differentiable and multimodal in nature. Classical optimization methods cannot converge to solutions. Because they have disadvantages such as highly sensitive to starting points, frequent convergence to local optimum solution or divergence or revisiting the same solution, requirement of continuous and differentiable object

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9

Mueller, Jaclyn A., Alexander I. Culley, and Grieg F. Steward. "Variables Influencing Extraction of Nucleic Acids from Microbial Plankton (Viruses, Bacteria, and Protists) Collected on Nanoporous Aluminum Oxide Filters." Applied and Environmental Microbiology 80, no. 13 (2014): 3930–42. http://dx.doi.org/10.1128/aem.00245-14.

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ABSTRACTAnodic aluminum oxide (AAO) filters have high porosity and can be manufactured with a pore size that is small enough to quantitatively capture viruses. These properties make the filters potentially useful for harvesting total microbial communities from water samples for molecular analyses, but their performance for nucleic acid extraction has not been systematically or quantitatively evaluated. In this study, we characterized the flux of water through commercially produced nanoporous (0.02 μm) AAO filters (Anotop; Whatman) and used isolates (a virus, a bacterium, and a protist) and nat

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10

Govorun, I. V., B. A. Belyaev, Ya B. Zav’yalov, et al. "10 GHz MONOLITHIC FILTER BASED ON STRIPLINE RESONATORS WITH SPLIT CONDUCTOR." Доклады Российской академии наук. Физика, технические науки 513, no. 1 (2023): 88–94. http://dx.doi.org/10.31857/s268674002306007x.

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The monolithic design of the compact bandpass filter X-band is made on technology of multilayered printed circuit boards. A quarter-wave stripline resonators of the filter have two conductors divided by the layer prepreg having low parameters which is bonding together a design. This eliminates influence of prepreg on the characteristics of the devices, ensuring good repeatability of filters in mass production. For increase the high-frequency stopband of filter, one of the conductors of each resonator is cut in half by a transverse slit. The constructive sizes of the device were obtained by par

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Wang, Zhiyu, Yujian Shu, Siyuan Ma, et al. "3D Heterogenous Integrated Wideband Switchable Bandpass Filter Bank for Millimeter Wave Applications." Electronics 12, no. 1 (2022): 194. http://dx.doi.org/10.3390/electronics12010194.

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This article proposes a three-dimensional heterogenous-integrated (3DHI) switchable bandpass filter bank with two independent wideband filter channels that cover 26–40 GHz and 32.5–40 GHz, respectively. An accurate wafer-level process with a high hollowed ratio of the applied 8-inch high-resistivity-silicon (HR-Si) interposer wafers is presented to form both compact filter channels. Above the interdigital filter patterns fabricated on the bottom interposer wafer, deep cavities are etched in the cap interposer wafer to improve the quality factor of the filter bank. Besides the cavities, the cap

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Dash, Dipak Kumar, and Pradip Kumar Sadhu. "A Review on the Use of Active Power Filter for Grid-Connected Renewable Energy Conversion Systems." Processes 11, no. 5 (2023): 1467. http://dx.doi.org/10.3390/pr11051467.

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Renewable energy sources such as photovoltaic (PV) and wind energies are integrated into the grid due to their low global emissions and higher power conversion efficiency techniques. Grid-connected inverters are the core components of distributed generation networks. However, several harmonic current and voltage variations affect the performance of circuits in grid-connected networks. These issues can be easily resolved using passive filters, static vector generators, and dynamic energy filters (APFs). In higher-level units, the cost, dimensions, and weight of passive filters increase proporti

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Djaelani, Muhammad Anwar, Kusuma Alya Fathurika, Kasiyati Kasiyati, and Sunarno Sunarno. "Carcass Weight and Skeletal Muscle Microscopic Structure of Red Nile Tilapia (Oreochromis niloticus) in The Different Aeration and Filtration." Al-Kauniyah: Jurnal Biologi 17, no. 2 (2024): 361–69. http://dx.doi.org/10.15408/kauniyah.v17i2.31948.

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AbstractRed tilapia (Oreochromis niloticus) is a freshwater fish that widely liked by Indonesian people. Keeping fish with good water quality will increase productivity. The aim of this research was to determine the effect of adding aeration and using filters on carcass weight, muscle fiber diameter and number of muscle fibers in red tilapia. This research used 24 red tilapia fish with an initial body weight of around 7 g. Divided into 4 groups, namely the maintenance group using one aerator without a filter (ANF), the maintenance group using two aerators without a filter (AANF), the maintenan

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Finster, P., J. Hollweg, and F. Seehofer. "Determination of Triacetin in Cigarette Filters by Pulsed Nuclear Magnetic Resonance Spectroscopy - Bestimmung von Triacetin in Zigarettenfiltern mit Hilfe der gepulsten Kernresonanzspektroskopie." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 13, no. 5 (1986): 255–64. http://dx.doi.org/10.2478/cttr-2013-0575.

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AbstractOur investigations show that pulsed nuclear magnetic resonance spectroscopy (p-NMR) is a suitable method of determining the triacetin content of freshly produced filter rods. The table-top pulse spectrometer tested in filter rod production distinguishes itself by the fact that it enables exact and reproducible direct measurements of whole filter rods to be made in seconds. There is no need for the whole process of preparing samples; after measurement the filters can be fed back into the production process. With the measuring method we have developed triacetin can be determined complete

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Li, Lei, Margaret W. Frey, and Thomas B. Green. "Modification of Air Filter Media with Nylon-6 Nanofibers." Journal of Engineered Fibers and Fabrics 1, no. 1 (2006): 155892500600100. http://dx.doi.org/10.1177/155892500600100101.

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Nylon-6 fibers with average diameters below 500 nm were electrospun onto conventional air filter media at varying weight coverage levels using a multi-nozzle bank. The initial filtration efficiency of the air filter media was improved significantly with increasing coverage level and decreasing size of nylon-6 fibers. Nylon-6 fibers were very durable on the air filter media at the coverage level of 0.1 g/m2 due to the good adhesion with the air filter fibers. The production efficiency of the coated air filter media could be increased by using more nozzle banks for electrospinning without affect

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Barbu, Tudor. "Automatic Unsupervised Texture Recognition Framework Using Anisotropic Diffusion-Based Multi-Scale Analysis and Weight-Connected Graph Clustering." Symmetry 13, no. 6 (2021): 925. http://dx.doi.org/10.3390/sym13060925.

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A novel unsupervised texture classification technique is proposed in this research work. The proposed method clusters automatically the textures of an image collection in similarity classes whose number is not a priori known. A nonlinear diffusion-based multi-scale texture analysis approach is introduced first. It creates an effective scale-space by using a well-posed anisotropic diffusion filtering model that is proposed and approximated numerically here. A feature extraction process using a bank of circularly symmetric 2D filters is applied at each scale, then a rotation-invariant texture fe

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Robbiano, Valentina, Salvatore Surdo, Alessandro Minotto, et al. "C-Si hybrid photonic structures by full infiltration of conjugated polymers into porous silicon rugate filters." Nanomaterials and Nanotechnology 8 (January 1, 2018): 184798041878840. http://dx.doi.org/10.1177/1847980418788404.

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Loading of one-dimensional (1-D) porous silicon photonic crystals (PS-PhCs), known as rugate filters, with luminescent materials is generally limited by the potential for (undesired) “pore clogging,” in relation to the size of the nanoparticles (e.g. quantum dots) or molecular species, and so far mainly restricted to small molecular weight materials or small nanocrystals, or in situ polymerized dyes. Here we report the infiltration 1-D PS-PhCs with a green-emitting commercial luminescent polymer (F8BT, poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)]), with a mole

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18

Pedzisz, Maciej, and Danilo P. Mandic. "A Homomorphic Neural Network for Modeling and Prediction." Neural Computation 20, no. 4 (2008): 1042–64. http://dx.doi.org/10.1162/neco.2008.12-06-418.

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A homomorphic feedforward network (HFFN) for nonlinear adaptive filtering is introduced. This is achieved by a two-layer feedforward architecture with an exponential hidden layer and logarithmic preprocessing step. This way, the overall input-output relationship can be seen as a generalized Volterra model, or as a bank of homomorphic filters. Gradient-based learning for this architecture is introduced, together with some practical issues related to the choice of optimal learning parameters and weight initialization. The performance and convergence speed are verified by analysis and extensive s

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19

Zhao, Kunchen, and Dimitra Psychogiou. "Monolithically-integrated 3D printed coaxial bandpass filters and RF diplexers: single-band and dual-band." International Journal of Microwave and Wireless Technologies 14, no. 3 (2021): 293–304. http://dx.doi.org/10.1017/s1759078721001471.

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AbstractThe manuscript reports on additively-manufactured (AM) coaxial-resonator-based bandpass filters (BPFs) and RF diplexers. A monolithic integration concept using stereolithography apparatus (SLA) is proposed and discussed in detail. Coupled-resonator-based synthesis alongside full-electromagnetic-based design methods is used for the design of the monolithic filters and RF diplexers. In particular, the paper discusses a new external coupling mechanism for dual-band BPFs that allow to independently control the coupling in each of the BPF passbands. Furthermore, a novel coaxial transmission

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Chang, Cheng-Yuan, Ming-Han Ho, and Sen M. Kuo. "Improved Direct–Parallel Active Noise Control Systems for Narrowband Noise." Acoustics 7, no. 1 (2025): 4. https://doi.org/10.3390/acoustics7010004.

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Narrowband active noise control (NANC) systems are extensively used to cancel narrowband noise. Direct, parallel, and direct–parallel NANC systems use nonacoustic sensors to measure rotational speeds, and a bank of signal generators then produces synchronized sinusoidal waveforms as reference signals corresponding to the fundamental frequency of the undesired noise. The performance of direct NANC systems is based on the frequency difference between two adjacent reference input sinusoids. Parallel NANC systems apply several sinewave generators and two-weight adaptive filters in parallel to atte

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Zhilyakov, Evgeny G., Sergei P. Belov, Ivan I. Oleinik, Sergei L. Babarinov, and Diana I. Trubitsyna. "Generalized sub band analysis and signal synthesis." Bulletin of Electrical Engineering and Informatics 9, no. 3 (2020): 964–72. http://dx.doi.org/10.11591/eei.v9i3.1709.

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Currently, one of the main approaches used in analyzing properties and synthesis of signals in various classes is the subband methodology, which is carried out from the position of Fourier transform of signal samples (frequency representations) into subbands of the transform definition domain (transformants). In this case, the main tool, which is widely used for subband analysis (including wavelet analysis), is usage of bandpass filters (mainly those with finite impulse response or FIR filters). The present paper introduces the basics of building a theory forsubband analysis / signal synthesis

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Evgeny, G. Zhilyakov, P. Belov Sergei, I. Oleinik Ivan, L. Babarinov Sergei, and I. Trubitsyna Diana. "Generalized sub band analysis and signal synthesis." Bulletin of Electrical Engineering and Informatics 9, no. 3 (2020): 964–72. https://doi.org/10.11591/eei.v9i3.1709.

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Currently, one of the main approaches used in analyzing properties and synthesis of signals in various classes is the subband methodology, which is carried out from the position of Fourier transform of signal samples (frequency representations) into subbands of the transform definition domain (transformants). In this case, the main tool, which is widely used for subband analysis (including wavelet analysis), is usage of bandpass filters (mainly those with finite impulse response or FIR filters). The present paper introduces the basics of building a theory forsubband analysis/signal synthesis f

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23

Beley, V. F., and K. V. Korotkikh. "Efficiency increasing of a shipyard power supply system." Vestnik MGTU 27, no. 4 (2024): 598–610. https://doi.org/10.21443/1560-9278-2024-27-4-598-610.

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The development of the shipbuilding industry involves increasing the competitiveness of manufactured products, replacing obsolete electrical equipment, and increasing the efficiency of power supply systems. The introduction of the latest technologies reduces the weight and size of equipment, expands their functionality, but these technologies are based on nonlinear and asymmetrical power consumers, which causes a negative impact on the power grid. The power supply system of the Baltic Shipyard "Yantar" is characterized by a significant share of nonlinear, asymmetrical loads, often single-phase

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Sotzen, Kristin S., Kevin B. Stevenson, Erin M. May, et al. "On the Utility of Transmission Color Analysis i: Differentiating Super-Earths and Sub-Neptunes." Astronomical Journal 162, no. 4 (2021): 168. http://dx.doi.org/10.3847/1538-3881/ac0e2c.

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Abstract The majority of exoplanets found to date have been discovered via the transit method, and transmission spectroscopy represents the primary method of studying these distant worlds. Currently, in-depth atmospheric characterization of transiting exoplanets entails the use of spectrographs on large telescopes, requiring significant observing time to study each planet. Previous studies have demonstrated trends for solar system worlds using color–color photometry of reflectance spectra, as well as trends within transmission spectra for hot Jupiters. Building on these concepts, we have inves

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Du, Zhengjun, and Jin Pan. "Half-Mode Dielectric-Filled Resonator and Its Application in Bandpass Filters." Electronics 14, no. 8 (2025): 1488. https://doi.org/10.3390/electronics14081488.

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This article presents a novel design for half-mode (HM) dielectric-filled resonators based on the concept of virtual magnetic walls (VMWs). The underlying principles of the HM resonator are explored, along with a design methodology for implementing the VMW through an open aperture (OA) with no restrictions on the aspect ratio of the dielectric-filled resonator. The VMW implementation is analyzed using transmission line theory. Compared to conventional full-mode (FM) dielectric-filled resonators, the proposed HM dielectric-filled resonator achieves a 37% reduction in both size and weight. The H

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Zhang, Qian, Kuo-Jui Wu, and Ming-Lang Tseng. "Exploring Carry Trade and Exchange Rate toward Sustainable Financial Resources: An application of the Artificial Intelligence UKF Method." Sustainability 11, no. 12 (2019): 3240. http://dx.doi.org/10.3390/su11123240.

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This paper constructs a heterogeneous agent model for the foreign exchange market that is based on the law of supply and demand and includes carry trade, central bank intervention, and macroeconomic fundamentals. With the artificial intelligence method of the unscented Kalman filter, this paper investigates carry traders’ expectation formation and risk aversion and the impact of their activities on the movement of the Chinese yuan exchange rate and on the efficiency of central bank intervention. The findings demonstrate that carry traders’ activities are partially responsible for fluctuations

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27

Tamami, Wimpi Rizal. "PENINGKATAN FAKTOR DAYA DAN EFFESIENSI KONSUMSI ENERGI LISTRIK PADA KAPAL BULK CARRIER 50.000 DWT (DEAD WEIGHT TON) MENGGUNAKAN FILTER PASIF." MEDIA ELEKTRIKA 14, no. 2 (2022): 62. http://dx.doi.org/10.26714/me.14.2.2021.62-75.

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Sistem kelistrikkan kapal Bulk Carrier 50.000 dwt (dead weight ton) memiliki faktor daya yang menurun akibat besarnya beban-beban yang bersifat induktif, sehingga membutuhkan kapasitor bank untuk peningkatan faktor daya. Filter pasif selain untuk memperbaiki kecacatan gelombang dapat juga meningkatkan faktor daya. Pada Tugas Akhir ini dilakukan simulasi pemasangan manual step kapasitor dan filter pasif di setiap skema pembebanan. di hasil simulasi rata rata peningkatan faktor daya dari semua skema pembebanan adalah 10,15%. Pada tugas akhir ini perhitungan rata rata penghematan bahan bakar pada

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Tamami, Wimpi Rizal. "PENINGKATAN FAKTOR DAYA DAN EFFESIENSI KONSUMSI ENERGI LISTRIK PADA KAPAL BULK CARRIER 50.000 DWT (DEAD WEIGHT TON) MENGGUNAKAN FILTER PASIF." MEDIA ELEKTRIKA 14, no. 2 (2022): 62. http://dx.doi.org/10.26714/me.v14i2.6985.

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Sistem kelistrikkan kapal Bulk Carrier 50.000 dwt (dead weight ton) memiliki faktor daya yang menurun akibat besarnya beban-beban yang bersifat induktif, sehingga membutuhkan kapasitor bank untuk peningkatan faktor daya. Filter pasif selain untuk memperbaiki kecacatan gelombang dapat juga meningkatkan faktor daya. Pada Tugas Akhir ini dilakukan simulasi pemasangan manual step kapasitor dan filter pasif di setiap skema pembebanan. di hasil simulasi rata rata peningkatan faktor daya dari semua skema pembebanan adalah 10,15%. Pada tugas akhir ini perhitungan rata rata penghematan bahan bakar pada

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Vieira, M., M. A. Vieira, P. Louro, A. Fantoni, V. Silva, and M. Barata. "SiC multilayer photonic structures with self optical bias amplification." MRS Proceedings 1426 (2012): 229–35. http://dx.doi.org/10.1557/opl.2012.887.

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ABSTRACTStacked layered pin a-SiC/a-Si devices based on a filter design are approached from a reconfigurable point of view. This paper shows that a double SiC/Si pin photodiode can be de-composed into two photonic active filters changeable in function. Reconfiguration is provided by optical control signals to the optoelectronic front and back pin building blocks. Depending on the wavelength and irradiation side of the external optical bias the device acts either as a short- and a long- pass band filter or as a band-stop filter, amplifying or rejecting a specific wavelength range. Particular at

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Atamanskyi, D. V., V. P. Riabukha, V. M. Kartashov, A. V. Semeniaka, and L. V. Procopenco. "SPECTRAL ESTIMATION METHODS FOR A JOINT SYSTEM OF THE NON-NOISE-LIKE TARGETS DETECTION AND THE NOISE RADIATING SOURCES LOCALIZATION." Radio Electronics, Computer Science, Control, no. 1 (April 1, 2022): 7. http://dx.doi.org/10.15588/1607-3274-2022-1-1.

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Context. For many radars, the autonomous systems of the non-noise-like aerial targets (AT) detection and the noise radiating sources (NRS) localization (direction-of-arrival estimation) may be replaced with a single detection-localization system, which carries out the common operations of the AT-detection and the NRS-localization only once. For such a system, groups of noneigenvalue and eigenvalue decomposition based “super-resolving” spectral estimation (SE) methods are considered to substantiate efficient one for the NRS-localization. Objective. The comparative analysis efficiency of t

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Abdullah-Al-Mamun, K., F. Sarker, and G. Muhammad. "A High Resolution Pitch Detection Algorithm Based on AMDF and ACF." Journal of Scientific Research 1, no. 3 (2009): 508–15. http://dx.doi.org/10.3329/jsr.v1i3.2569.

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This paper proposes a noise robust high resolution pitch detection algorithm based on AMDF and ACF. The falling trend of AMDF is eliminated by an alignment technique, and AMDF and ACF are combined to take the advantage of their complementary nature. These two functions are combined by multiplication and addition over several band pass filters to enhance important candidates and suppress less important candidates. Then using a sophisticated weight assignment procedure, the candidate with the highest weight is selected as pitch. The proposed method is evaluated on different colored noisy speech

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Zhang, Dian, Bo Wang, and Qing Liang Qin. "A Portable Electroencephalogram Recording System for Rats." Applied Mechanics and Materials 577 (July 2014): 1236–40. http://dx.doi.org/10.4028/www.scientific.net/amm.577.1236.

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A wireless portable electroencephalogram (EEG) recording system for animals was designed, manufactured and then tested in rats. The system basically consisted of four modules: 1) EEG collecting module with the wireless transmitter and receiver (designed by NRF24LE1), 2) filter bank consisting of pre-amplifier, band pass filter and 50Hz trapper, 3) power management module and 4) display interface for showing EEG signals. The EEG data were modulated firstly and emitted by the wireless transmitter after being amplified and filtered. The receiver demodulated and displayed the signals in voltage th

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SAHU, O. P., M. K. SONI, and I. M. TALWAR. "DESIGNING QUADRATURE MIRROR FILTER BANKS USING STEEPEST DESCENT METHOD." Journal of Circuits, Systems and Computers 15, no. 01 (2006): 29–41. http://dx.doi.org/10.1142/s0218126606002903.

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This paper proposes a new technique for the design of quadrature mirror filter (QMF) banks by exploiting steepest descent method. The design problem is formulated to minimize an objective function, which is a weighted sum of the pass band error and stop band residual energy of the low pass analysis filter of the QMF bank. The minimization has been carried out gradually by respective optimum step lengths in the corresponding steepest descent directions of a linear combination of the objective function and square of the reconstruction error of the QMF bank at the quadrature frequency by optimizi

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Xu, Xiao Wen. "A New Local and Global Model to Iris Recognition." Advanced Materials Research 658 (January 2013): 592–96. http://dx.doi.org/10.4028/www.scientific.net/amr.658.592.

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Traditional iris recognition systems transfer iris images to polar coordinates, normalize the images and achieve rotation invariance by rotating the feature vector. In order to decrease the complexity of the typical iris recognition method, we propose a new method of iris recognition based on global and local model that are extracted from preprocessed iris image without normalizing. Firstly, we applied a bank of no-tensor product wavelet filters to extract the global features of the iris. Secondly, we used a SIFT method to extract the local features points of the selected regions. Finally, we

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Bicer, Sinan, Abdulrahman Nasser Abass Abdo, Habib Dogan, and Abdullah Genc. "Experimental Assessment of the Performance of Meta-resonator Based Band-stop Waveguide Filters Fabricated with CNC Milling and Stereolithography Methods." WSEAS TRANSACTIONS ON COMMUNICATIONS 23 (December 27, 2024): 121–27. https://doi.org/10.37394/23204.2024.23.16.

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In this work, using SRR meta-resonators, a band-stopping waveguide filter (WGF) in C band (4-7.5 GHz) is designed and fabricated by using both CNC milling and SLA methods, and the effect of the fabrication methods on the filter performance is experimentally evaluated. The filter order for each case is increased from 1 to 7 and meta-resonators are used as many as the number of filter degrees. To determine the performance of the WGFs, some results such as frequency response, center frequency, fractional bandwidth (FBW), and quality factor (Q) values are given comparatively for each filter order.

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Falkovich, A. H., E. R. Graber, G. Schkolnik, Y. Rudich, W. Maenhaut, and P. Artaxo. "Low molecular weight organic acids in aerosol particles from Rondônia, Brazil, during the biomass-burning, transition and wet periods." Atmospheric Chemistry and Physics 5, no. 3 (2005): 781–97. http://dx.doi.org/10.5194/acp-5-781-2005.

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Abstract. Particles from biomass burning and regional haze were sampled in Rondônia, Brazil, during dry, transition and wet periods from September to November 2002, as part of the LBA-SMOCC (Large-Scale Biosphere-Atmosphere Experiment in Amazonia – Smoke, Aerosols, Clouds, Rainfall, and Climate) field campaign. Water soluble organic and inorganic compounds in bulk (High Volume and Stacked Filter Unit sampler) and size-resolved (Micro Orifice Uniform Deposit Impactor – MOUDI) smoke samples were determined by ion chromatography. It was found that low molecular weight polar organic acids account

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Takakura, Tadashi, Masako Akutsu, Haruki Sunagawa, et al. "NON-DESTRUCTIVE, REAL-TIME, AND AUTOMATIC MEASUREMENT OF TRANSPIRATION FROM A PLANT CANOPY STAND." JOURNAL OF ADVANCES IN AGRICULTURE 5, no. 2 (2016): 677–83. http://dx.doi.org/10.24297/jaa.v5i2.5083.

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This study to measure plant canopy stand transpiration was conducted using newly developed sensor units. Transpiration from the tomato stand and by artificial leaves made of towel and paper filters showed good agreement with data measured by weight loss using a weighing device. The problem of sun flecks directly on the back side of the sensor causes malfunction of the energy balance equation, which is the basis of this method when LAI is not dense. During the period when a sun fleck was on the sensor, the data were eliminated. Overall measurements of this kind are far superior to measurements

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Oliveira, Cláuber Muniz de, Alexandre Henrique de Sousa Lima, and Marcela Álvares Oliveira. "Characterization of solid waste in the permanent preservation area of the Bate Estacas stream, Porto Velho, Rondônia." Nature and Conservation 14, no. 2 (2021): 22–32. http://dx.doi.org/10.6008/cbpc2318-2881.2021.002.0003.

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Permanent Preservation Areas serve as filters to prevent impurities from reaching water bodies, protecting the banks from erosion, avoiding the obstruction of rivers caused by waste dumped in inappropriate places. The present study aimed to inventory, quantify, and analyze the types of solid waste irregularly deposited on the banks and in the Bate Estacas stream in Porto Velho, Rondônia. The Bate Estaca stream is approximately 6.5 km² long, covering the Cohab, Castanheira, Caladinho, and Aeroclube neighborhoods. The data collection was conducted in plots located in isolated tree stretches, app

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Li, Mingai, Ruotu Wang, and Dongqin Xu. "An Improved Composite Multiscale Fuzzy Entropy for Feature Extraction of MI-EEG." Entropy 22, no. 12 (2020): 1356. http://dx.doi.org/10.3390/e22121356.

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Motor Imagery Electroencephalography (MI-EEG) has shown good prospects in neurorehabilitation, and the entropy-based nonlinear dynamic methods have been successfully applied to feature extraction of MI-EEG. Especially based on Multiscale Fuzzy Entropy (MFE), the fuzzy entropies of the τ coarse-grained sequences in τ scale are calculated and averaged to develop the Composite MFE (CMFE) with more feature information. However, the coarse-grained process fails to match the nonstationary characteristic of MI-EEG by a mean filtering algorithm. In this paper, CMFE is improved by assigning the differe

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Lorato, Ilde, Sander Stuijk, Mohammed Meftah, et al. "Automatic Separation of Respiratory Flow from Motion in Thermal Videos for Infant Apnea Detection." Sensors 21, no. 18 (2021): 6306. http://dx.doi.org/10.3390/s21186306.

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Both Respiratory Flow (RF) and Respiratory Motion (RM) are visible in thermal recordings of infants. Monitoring these two signals usually requires landmark detection for the selection of a region of interest. Other approaches combine respiratory signals coming from both RF and RM, obtaining a Mixed Respiratory (MR) signal. The detection and classification of apneas, particularly common in preterm infants with low birth weight, would benefit from monitoring both RF and RM, or MR, signals. Therefore, we propose in this work an automatic RF pixel detector not based on facial/body landmarks. The m

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Cho, Junghyun, Yejune Seo, Jihaeng Cho, et al. "Effective Size Reduction of the Metallic Waveguide Bandpass Filter with Metamaterial Resonators and Its 3D-Printed Version." Sensors 23, no. 3 (2023): 1173. http://dx.doi.org/10.3390/s23031173.

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In this paper, a novel method is proposed to effectively reduce the size of a waveguide bandpass filter (BPF). Because the metallic cavities make the conventional waveguide end up with a large geometry, especially for high-order BPFs, very compact waveguide-type resonators having metamaterial zeroth-order resonance (WG ZOR) are designed on the cross section of the waveguide and substituted for the cavities. While the cavities are half-wavelength resonators, the WG ZOR is shorter than one-eighth of a wavelength. A substantial reduction in the size and weight of the waveguide filter is observed

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Paramanik, Rajendra, and Bandi Kamaiah. "An empirical analysis of Indian business cycle dynamics." Ekonomski anali 62, no. 213 (2017): 7–25. http://dx.doi.org/10.2298/eka1713007p.

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This paper attempts to construct a monthly Composite Index of Leading Indicators (CILI) for the Indian business cycle between April 1994 and December 2015. The cyclical component of the Index of Industrial Production (IIP), generated by Baxter-King band pass filters, is considered as a reference series for Indian business cycle analysis. A set of indicator variables pertaining to different sectors of the economy are chosen on the basis of their strong leading correlation with the reference series. Further, Principal Component Analysis (PCA) technique is applied to assign an appropriate weight

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Bianchi, Maria, Patrizia Papacci, Serena Spartano, et al. "Transfusion Of Very Low Birth Weight Neonates Using Allogeneic Cord Blood Derived RBC Units." Blood 122, no. 21 (2013): 2398. http://dx.doi.org/10.1182/blood.v122.21.2398.2398.

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Abstract Infants with very low birth weight (VLBW) frequently need transfusions of red blood cells (RBCs) during the first weeks of life. However, adult blood transfusions are acknowledged risk factors for several complications, including Retinopathy of Prematurity (ROP), cytomegalovirus infection and necrotizing enterocolitis. For ROP, for example, it is thought that adult hemoglobin (HbA), with lower affinity for oxygen than foetal HbF, may induce an oxidative damage (Romagnoli C. Early Hum Dev 2009; 85, 10 Suppl:S79-S82). Previous studies showed that autologous cord blood (CB) could serve a

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Priyanka, Singh, Pandey G.P., and Guruprasad K.N. "Enhancement in Biomass and Yield of Soybean Var: JS-71-05 After Exclusion of Solar UV Components." International Journal of Contemporary Research in Multidisciplinary 4, no. 3 (2025): 76–83. https://doi.org/10.5281/zenodo.15465381.

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A field experiment was conducted to assess the effects of excluding solar UV-B (280–315 nm) and UV-A (315–400 nm) radiation on the growth, physiology, and yield of soybean (Glycine max L. Merrill var. JS-7105). Plants were cultivated under open-field conditions using a specially designed UV-exclusion setup with selective filters that blocked either UV-B (<315 nm) or both UV-A and UV-B (<400 nm) components of the solar spectrum. Control plants were grown under filters that transmitted ambient solar UV radiation. Exclusion of UV-B and UV-A/B led to significant improvements in v

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Rajapakse, Nihal C., Robert K. Pollock, Margaret J. McMahon, John W. Kelly, and Roy E. Young. "Interpretation of Light Quality Measurements and Plant Response in Spectral Filter Research." HortScience 27, no. 11 (1992): 1208–11. http://dx.doi.org/10.21273/hortsci.27.11.1208.

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Experiments were conducted to correlate the response of chrysanthemum [Dendrathema ×grandiflorum (Ramat.) Kitamura] plants to light environment based on various quantitative light quality parameters by growing plants under 6% or 40% CuSO4 and water spectral filters. Using a narrow band width (R = 655-665 and FR = 725-735 nm) or a broad band width (R = 600-700 and FR = 700-800 nm) for R: FR ratio calculation, 6% CuSO4 filter transmitted light with a higher R: FR ratio than 40% CuSO4 or water filters. Light transmitted through 40% CuSO4 and water filters had similar narrow band R: FR ratios (≈1.

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Omar, Abdulkareem Mahmood, and I. Hammad Yousif. "Enhanced 5G contender based flat top weighted window communication systems." Bulletin of Electrical Engineering and Informatics 11, no. 1 (2022): 364–71. https://doi.org/10.11591/eei.v11i1.3599.

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To create a new transmission phenomenon, the availability of good data rates, the development of the internet of things (IoT), and different machine type communications (MTC) developed the ability to converse without synchronization, or the need for routing overhead in the form of synchronization overhead, while using mixed legacy fourth generation (4G) systems, based on orthogonal frequency division multiplexing, cannot meet these requirements (OFDM). Many waveform alternatives for OFDM have been proposed, including FBMC, GFDM, UFMC, and filtering-OFDM, in order to meet the criteria of the ne

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Spector, Steven, and Cheryl Sorace-Agaskar. "Silicon photonics devices for integrated analog signal processing and sampling." Nanophotonics 3, no. 4-5 (2014): 313–27. http://dx.doi.org/10.1515/nanoph-2013-0036.

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AbstractSilicon photonics offers the possibility of a reduction in size weight and power for many optical systems, and could open up the ability to build optical systems with complexities that would otherwise be impossible to achieve. Silicon photonics is an emerging technology that has already been inserted into commercial communication products. This technology has also been applied to analog signal processing applications. MIT Lincoln Laboratory in collaboration with groups at MIT has developed a toolkit of silicon photonic devices with a focus on the needs of analog systems. This toolkit i

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Sharma, Arvind Kumar, and Amrita Puri. "Rational b-spline adaptive filter for active noise control of machinary noises." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 6 (2023): 2084–95. http://dx.doi.org/10.3397/in_2023_0307.

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Spline adaptive filter has a different architecture than linear-in-parameter nonlinear filters like Volterra filter. There are various kinds of splines like Bezier spline, B-spline and rational B-spline. Rational B spline has weights associated with control points and hence, provides more flexibility than B-spline to create a curve. This paper presents development of rational b-spline adaptive filter for active noise control. Updating equations to update control points and weights of control points are derived. A simulation study is presented to study performance of proposed rational B-spline

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Zhang, Xu, Hao Li, and Mang Ye. "Negative Pre-aware for Noisy Cross-Modal Matching." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 7 (2024): 7341–49. http://dx.doi.org/10.1609/aaai.v38i7.28564.

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Cross-modal noise-robust learning is a challenging task since noisy correspondence is hard to recognize and rectify. Due to the cumulative and unavoidable negative impact of unresolved noise, existing methods cannot maintain a stable performance when the noise increases. In this paper, we present a novel Negative Pre-aware Cross-modal (NPC) matching solution for large visual-language model fine-tuning on noisy downstream tasks. It is featured in two aspects: (1) For noise recognition and resistance, previous methods usually directly filter out a noise subset, we propose to estimate the negativ

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Jia, Weibin, Zhihuan Song, and Zhengguo Li. "Multi-scale Fusion of Stretched Infrared and Visible Images." Sensors 22, no. 17 (2022): 6660. http://dx.doi.org/10.3390/s22176660.

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Infrared (IR) band sensors can capture digital images under challenging conditions, such as haze, smoke, and fog, while visible (VIS) band sensors seize abundant texture information. It is desired to fuse IR and VIS images to generate a more informative image. In this paper, a novel multi-scale IR and VIS images fusion algorithm is proposed to integrate information from both the images into the fused image and preserve the color of the VIS image. A content-adaptive gamma correction is first introduced to stretch the IR images by using one of the simplest edge-preserving filters, which alleviat

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