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Artykuły w czasopismach na temat „BRANCHING PARTICLE FILTER”

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1

Crisan, Dan, and Salvador Ortiz-Latorre. "A Kusuoka–Lyons–Victoir particle filter." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 469, no. 2156 (2013): 20130076. http://dx.doi.org/10.1098/rspa.2013.0076.

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The aim of this paper is to introduce a new numerical algorithm for solving the continuous time nonlinear filtering problem. In particular, we present a particle filter that combines the Kusuoka–Lyons–Victoir (KLV) cubature method on Wiener space to approximate the law of the signal with a minimal variance ‘thinning’ method, called the tree-based branching algorithm (TBBA) to keep the size of the cubature tree constant in time. The novelty of our approach resides in the adaptation of the TBBA algorithm to simultaneously control the computational effort and incorporate the observation data into
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2

YEONG, HOONG CHIEH, JUN HYUN PARK, and N. SRI NAMACHCHIVAYA. "PARTICLE FILTERS IN A MULTISCALE ENVIRONMENT: WITH APPLICATION TO THE LORENZ-96 ATMOSPHERIC MODEL." Stochastics and Dynamics 11, no. 02n03 (2011): 569–91. http://dx.doi.org/10.1142/s0219493711003450.

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The study of random dynamical systems involves understanding the evolution of state variables that contain uncertainties and that are usually hidden, or not directly observable. Therefore, state variables have to be estimated and updated based on system models using information from observational data, which themselves are noisy, in the sense that they contain uncertainties and disturbances due to imperfections in observational devices and disturbances in the environment within which data are being collected. The development of efficient data assimilation methods for integrating observational
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3

Nakagawa, Hidetoshi, and Hideyuki Takada. "Numerical analysis of rating transition matrix depending on latent macro factor via nonlinear particle filter method." Journal of Financial Engineering 01, no. 03 (2014): 1450026. http://dx.doi.org/10.1142/s2345768614500263.

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We propose a new nonlinear filtering model for a better estimation of credit rating transition matrix consistent with the hypothesis that rating transition intensities as well as dynamics of financial asset prices depend on some unobservable macroeconomic factor. We attempt a branching particle filter method to numerically obtain the conditional distribution of the latent factor. For an illustration, we analyze a rating transition history of Japanese enterprises. As a result, we realize that our model can capture some contagion effect of credit events and an interpolative role of financial mar
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4

Jeon, Byunghwan. "Deep Recursive Bayesian Tracking for Fully Automatic Centerline Extraction of Coronary Arteries in CT Images." Sensors 21, no. 18 (2021): 6087. http://dx.doi.org/10.3390/s21186087.

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Extraction of coronary arteries in coronary computed tomography (CT) angiography is a prerequisite for the quantification of coronary lesions. In this study, we propose a tracking method combining a deep convolutional neural network (DNN) and particle filtering method to identify the trajectories from the coronary ostium to each distal end from 3D CT images. The particle filter, as a non-linear approximator, is an appropriate tracking framework for such thin and elongated structures; however, the robust ‘vesselness’ measurement is essential for extracting coronary centerlines. Importantly, we
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Saraiev, Olexii, and Alexander Khrulev. "Devising a model of the airflow with dust particles in the intake system of a vehicle’s internal combustion engine." Eastern-European Journal of Enterprise Technologies 2, no. 1 (110) (2021): 61–69. http://dx.doi.org/10.15587/1729-4061.2021.230113.

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This paper considers the mechanism of malfunction of internal combustion engines that implies the accelerated local wear of parts in individual cylinders as a result of uneven distribution of dust particles that pass through the air filter in the intake system. In order to acquire quantitative data on the effect of the structure of the intake system on the redistribution of dust in engine cylinders, the two-phase flow of air with dust particles in the standard elements of the intake system was mathematically modeled. ANSYS software package was used to solve the problem. A simulation technique
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6

Meusinger, Carl, Ulrike Dusek, Stephanie M. King та ін. "Chemical and isotopic composition of secondary organic aerosol generated by <i>α</i>-pinene ozonolysis". Atmospheric Chemistry and Physics 17, № 10 (2017): 6373–91. http://dx.doi.org/10.5194/acp-17-6373-2017.

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Abstract. Secondary organic aerosol (SOA) plays a central role in air pollution and climate. However, the description of the sources and mechanisms leading to SOA is elusive despite decades of research. While stable isotope analysis is increasingly used to constrain sources of ambient aerosol, in many cases it is difficult to apply because neither the isotopic composition of aerosol precursors nor the fractionation of aerosol forming processes is well characterised. In this paper, SOA formation from ozonolysis of α-pinene – an important precursor and perhaps the best-known model system used in
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7

Kouritzin, Michael A. "Residual and stratified branching particle filters." Computational Statistics & Data Analysis 111 (July 2017): 145–65. http://dx.doi.org/10.1016/j.csda.2017.02.003.

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8

Kouritzin, Michael A. "Convergence rates for residual branching particle filters." Journal of Mathematical Analysis and Applications 449, no. 2 (2017): 1053–93. http://dx.doi.org/10.1016/j.jmaa.2016.12.046.

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9

Hoogenboezem, Wim, Jos G. M. van den Boogaart, Ferdinand A. Sibbing, Eddy H. R. R. Lammens, Arie Terlouw, and Jan W. M. Osse. "A New Model of Particle Retention and Branchial Sieve Adjustment in Filter-Feeding Bream (Abramis brama, Cyprinidae)." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 1 (1991): 7–18. http://dx.doi.org/10.1139/f91-002.

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A new model for filter feeding in bream (Abramis brama, Cyprinidae) is presented based on the three dimensional architecture of the branchial sieve. Transverse ridges on the upper surface of the gill arches form a system of channels in which food particles appear to be retained. These ridges are formed by a fleshy interconnection between the middle part of the gill arch and the bony parts of its gill rakers. Muscles attached to the rakers, present only on the lateral edge of the gill arch, indicate movability of the lateral bony raker element. If the fish is foraging on particles smaller than
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10

Kouritzin, Michael A., and Wei Sun. "Rates for branching particle approximations of continuous-discrete filters." Annals of Applied Probability 15, no. 4 (2005): 2739–72. http://dx.doi.org/10.1214/105051605000000539.

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11

Robertson, Christopher G., Sankar Raman Vaikuntam, and Gert Heinrich. "A Nonequilibrium Model for Particle Networking/Jamming and Time-Dependent Dynamic Rheology of Filled Polymers." Polymers 12, no. 1 (2020): 190. http://dx.doi.org/10.3390/polym12010190.

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We describe an approach for modeling the filler network formation kinetics of particle-reinforced rubbery polymers—commonly called filler flocculation—that was developed by employing parallels between deformation effects in jammed particle systems and the influence of temperature on glass-forming materials. Experimental dynamic viscosity results were obtained concerning the strain-induced particle network breakdown and subsequent time-dependent reformation behavior for uncross-linked elastomers reinforced with carbon black and silica nanoparticles. Using a relaxation time function that depends
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12

Hoogenboezem, Wim, and Jos G. M. van den Boogaart. "Importance of Mucus in Filter-Feeding of Bream (Abramis brama)." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 3 (1993): 472–79. http://dx.doi.org/10.1139/f93-055.

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Mucus boluses, found in the oropharyngeal cavity of a large number of freshly caught bream (Abramis brama), appear to play an important role in the aggregation and transport of food particles from the branchial sieve to the esophagus. Mucus boluses, some containing up to 900 zooplankters, were isolated from the oropharyngeal cavity of bream, and from these the filtering rate and retention ability of the filtering system were calculated. Using light microscopy and special staining methods, we identified different types of mucus cells in the oropharyngeal wall of bream that increase in number fr
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13

Warasitthinon, Nadhatai, Anne-Caroline Genix, Michael Sztucki, Julian Oberdisse, and Christopher G. Robertson. "THE PAYNE EFFECT: PRIMARILY POLYMER-RELATED OR FILLER-RELATED PHENOMENON?" Rubber Chemistry and Technology 92, no. 4 (2019): 599–611. http://dx.doi.org/10.5254/rct.19.80441.

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ABSTRACT The hysteretic softening at small dynamic strains (Payne effect)—related to the rolling resistance and viscoelastic losses of tires—was studied as a function of particle size, filler volume fraction, and temperature for carbon black (CB) reinforced uncrosslinked styrene–butadiene rubber (SBR) and a paste-like material composed of CB-filled paraffin oil. The low-strain limit for dynamic storage modulus was found to be remarkably similar for CB-filled oil and the CB-filled SBR. Small-angle X-ray scattering (SAXS) measurements on the simple composites and detailed data analysis confirmed
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14

Fan, Ming, Wenhao He, Qiangzhi Li, et al. "PTFE Crystal Growth in Composites: A Phase-Field Model Simulation Study." Materials 15, no. 18 (2022): 6286. http://dx.doi.org/10.3390/ma15186286.

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We investigated, via a phase-field model simulation, the effects of a matrix’s properties and a filler’s characters on the polytetrafluoroethylene (PTFE) crystal growth process in composites under various supercooling degrees. The results show that the supercooling degree has a deciding influence on the crystal growth process. The intrinsic properties of PTFE polymer, such as anisotropic strength and phase transition latent heat, affect the growth rate, orientation, and interfacial integrity of the crystal trunk and the branching of the PTFE crystal growth process. The factors of the PTFE crys
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15

CANDIOTI, M. FLORENCIA VERA. "Anatomy of anuran tadpoles from lentic water bodies: systematic relevance and correlation with feeding habits." Zootaxa 1600, no. 1 (2007): 1–175. http://dx.doi.org/10.11646/zootaxa.1600.1.1.

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I studied anatomy, gut content, and the relationship among these traits in a set of anuran tadpoles. Larval stages (mainly Gosner stages 31–36) of nineteen species from various lentic environments were selected. Morphological characters from the skeleton, musculature, oral apparatus and buccopharyngeal cavity were recorded, and a gut content analysis was performed, with emphasis on food size distribution. Ordination techniques were applied in order to find patterns of similarity in morphology and gut content. Canonical ordination methods were used to investigate the relationship among gut cont
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16

Berg, Coen van den, Jos G. M. van den Boogaart, Ferdinand A. Sibbing, Eddy H. R. R. Lammens, and Jan W. M. Osse. "Shape of Zooplankton and Retention in Filter-Feeding: A Quantitative Comparison between Industrial Sieves and the Branchial Sieves of Common Bream (Abramis brama) and White Bream (Blicca bjoerkna)." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 4 (1993): 716–24. http://dx.doi.org/10.1139/f93-082.

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Industrial sieves retained all cycloid copepods with a width larger than their mesh size, but Daphnia, with a width up to 1.4 times the mesh size, still passed through them. Daphnia have a lower depth/width ratio than copepods (0.599 and 0.882, respectively). Therefore, Daphnia could pass through the square meshes diagonally. In filter-feeding experiments with common bream (Abramis brama), the smallest retained copepods correspondingly were about 35% less wide than the smallest retained Daphnia. White bream (Blicca bjoerkna) did not retain copepods smaller than Daphnia. In the reducible-channe
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17

Veeramalla, Santhosh Kumar, and V. Hindumathi. "A Framework for Solving the Source Localization of the EEG Measurements with the Application of Particle Filtering with Branching Resampling." Journal of Circuits, Systems and Computers, March 24, 2022. http://dx.doi.org/10.1142/s021812662250181x.

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Inverse algorithms are used to assess EEG source parameters. This involves identifying unknown voxels in hundreds of different regions, giving an incomplete picture of the brain. There are no uniform solutions since the same sensor output may come from many source configurations. To overcome the lack of uniqueness, one must consider previous information and parameters inherent in the source. Our goal is to predict the location of brain sources from the recorded EEG signal without any prior knowledge of sources. We applied a particle filter to locate the brain sources in this article. The degen
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18

Soeid, Marini, Abdul Haris, and Syafiuddin Syafiuddin. "The Ability of biofilter sponge demospongiae class with various forms of growth towards the turbidity and total suspended solid." TORANI: Journal of Fisheries and Marine Science 2, no. 2 (2019). http://dx.doi.org/10.35911/torani.v2i2.7058.

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The sponge is an invertebrate animal from phylum porifera that lives permanently and filters out what is in the water column. The sponge has various forms of growth, including massive, branching, and submissive. Each form of growth is indicated to have different filtering abilities, so this research needs to be done. This study aims to determine whether the ability to filter (biofilter) Turbidity and Total Suspended Solid sponge depends on the form of growth (Massive, Submassive, and Branching). This research was conducted from September to October 2016. Taking sponges in the waters of Barrang
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