Log in

Relevant bibliographies by topics / Fast particles / Journal articles

To see the other types of publications on this topic, follow the link: Fast particles.

Journal articles on the topic 'Fast particles'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Fast particles.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Almerol, Jenny Lynn Ongue, and Marissa Pastor Liponhay. "Clustering of fast gyrotactic particles in low-Reynolds-number flow." PLOS ONE 17, no. 4 (2022): e0266611. http://dx.doi.org/10.1371/journal.pone.0266611.

Full text

Abstract:

Systems of particles in turbulent flows exhibit clustering where particles form patches in certain regions of space. Previous studies have shown that motile particles accumulate inside the vortices and in downwelling regions, while light and heavy non-motile particles accumulate inside and outside the vortices, respectively. While strong clustering is generated in regions of high vorticity, clustering of motile particles is still observed in fluid flows where vortices are short-lived. In this study, we investigate the clustering of fast swimming particles in a low-Reynolds-number turbulent flo

APA, Harvard, Vancouver, ISO, and other styles

2

Liang, Yongshi, Cliff Y. Guo, Xianglong Zhao, Qiang Qin, Yi Cheng, and Lixin He. "CPFD simulation on particle behaviour in an entrained-flow gasifier." Clean Energy 4, no. 1 (2020): 75–84. http://dx.doi.org/10.1093/ce/zkz032.

Full text

Abstract:

Abstract A computational particle fluid dynamics simulation model for entrained-flow gasification was established in this study. The simulation results agree with the experimental data. The detailed particle information and residence-time distribution were obtained by injecting particle tracers in the simulation. The results show that the particles in the gasifier can be classified into three flowing zones, i.e. a fast-flowing zone, a recirculation zone and a spreading zone. The criterion for this classification was also provided. The rapid gas expansion caused by the fast reactions plays a si

APA, Harvard, Vancouver, ISO, and other styles

3

Tully, Christopher G. "Fast timing for collider detectors." International Journal of Modern Physics A 31, no. 33 (2016): 1644022. http://dx.doi.org/10.1142/s0217751x1644022x.

Full text

Abstract:

Advancements in fast timing particle detectors have opened up new possibilities to design [Formula: see text] collider detectors that fully reconstruct and separate event vertices and individual particles in the time domain. The applications of these techniques are considered for the physics at CEPC.

APA, Harvard, Vancouver, ISO, and other styles

4

Fiore, Andrew M., and James W. Swan. "Fast Stokesian dynamics." Journal of Fluid Mechanics 878 (September 17, 2019): 544–97. http://dx.doi.org/10.1017/jfm.2019.640.

Full text

Abstract:

We present a new method for large scale dynamic simulation of colloidal particles with hydrodynamic interactions and Brownian forces, which we call fast Stokesian dynamics (FSD). The approach for modelling the hydrodynamic interactions between particles is based on the Stokesian dynamics (SD) algorithm (J. Fluid Mech., vol. 448, 2001, pp. 115–146), which decomposes the interactions into near-field (short-ranged, pairwise additive and diverging) and far-field (long-ranged many-body) contributions. In FSD, the standard system of linear equations for SD is reformulated using a single saddle point

APA, Harvard, Vancouver, ISO, and other styles

5

Yu, X. Y., J. P. Cowin, M. J. Iedema, and H. Ali. "Fast time-resolved aerosol collector: proof of concept." Atmospheric Measurement Techniques Discussions 3, no. 3 (2010): 2515–34. http://dx.doi.org/10.5194/amtd-3-2515-2010.

Full text

Abstract:

Abstract. Atmospheric particles can be collected in the field on substrates for subsequent laboratory analysis via chemically sensitive single particle methods such as scanning electron microscopy with energy dispersive x-ray analysis. With moving substrates time resolution of seconds to minutes can be achieved. In this paper, we demonstrate how to increase the time resolution when collecting particles on a substrate to a few milliseconds to provide real-time information. Our fast time-resolved aerosol collector ("Fast-TRAC") microscopically observes the particle collection on a substrate and

APA, Harvard, Vancouver, ISO, and other styles

6

Yu, X. Y., J. P. Cowin, M. J. Iedema, and H. Ali. "Fast time-resolved aerosol collector: proof of concept." Atmospheric Measurement Techniques 3, no. 5 (2010): 1377–84. http://dx.doi.org/10.5194/amt-3-1377-2010.

Full text

Abstract:

Abstract. Atmospheric particles can be collected in the field on substrates for subsequent laboratory analysis via chemically sensitive single particle methods such as scanning electron microscopy with energy dispersive x-ray analysis. With moving substrates time resolution of seconds to minutes can be achieved. In this paper, we demonstrate how to increase the time resolution when collecting particles on a substrate to a few milliseconds to provide real-time information. Our fast time-resolved aerosol collector ("Fast-TRAC") microscopically observes the particle collection on a substrate and

APA, Harvard, Vancouver, ISO, and other styles

7

Liu, Jinxian, Ye Chen, Bingbing Ni, Wei Ren, Zhenbo Yu, and Xiaoyang Huang. "Fast Fluid Simulation via Dynamic Multi-Scale Gridding." Proceedings of the AAAI Conference on Artificial Intelligence 37, no. 2 (2023): 1675–82. http://dx.doi.org/10.1609/aaai.v37i2.25255.

Full text

Abstract:

Recent works on learning-based frameworks for Lagrangian (i.e., particle-based) fluid simulation, though bypassing iterative pressure projection via efficient convolution operators, are still time-consuming due to excessive amount of particles. To address this challenge, we propose a dynamic multi-scale gridding method to reduce the magnitude of elements that have to be processed, by observing repeated particle motion patterns within certain consistent regions. Specifically, we hierarchically generate multi-scale micelles in Euclidean space by grouping particles that share similar motion patte

APA, Harvard, Vancouver, ISO, and other styles

8

Moenne-Loccoz, Nicolas, Ashkan Mirzaei, Or Perel, et al. "3D Gaussian Ray Tracing: Fast Tracing of Particle Scenes." ACM Transactions on Graphics 43, no. 6 (2024): 1–19. http://dx.doi.org/10.1145/3687934.

Full text

Abstract:

Particle-based representations of radiance fields such as 3D Gaussian Splatting have found great success for reconstructing and re-rendering of complex scenes. Most existing methods render particles via rasterization, projecting them to screen space tiles for processing in a sorted order. This work instead considers ray tracing the particles, building a bounding volume hierarchy and casting a ray for each pixel using high-performance GPU ray tracing hardware. To efficiently handle large numbers of semi-transparent particles, we describe a specialized rendering algorithm which encapsulates part

APA, Harvard, Vancouver, ISO, and other styles

9

Liu, De-Ling. "Evaluating Aerosol Aspiration Efficiency in Fast-moving Air." Journal of the IEST 56, no. 2 (2013): 20–28. http://dx.doi.org/10.17764/jiet.56.2.5600210764m14370.

Full text

Abstract:

Sampling representative aerosol particles in fast-moving air is a challenging task. Aerosols are significantly more massive than gas molecules, thus they might not follow air streamlines well and could be more easily subjected to sampling errors. This work examines the physical factors that govern the aspiration efficiency of an aerosol sampling probe in unidirectional moving air, and explores the plausible sampling deviations under various high air velocity scenarios. The particle sizes of 0.5 and 5 μm are of particular interest due to their use in defining air cleanliness levels in ISO 14644

APA, Harvard, Vancouver, ISO, and other styles

10

Dolgunin, Viktor, Andrey Kudi, Andrey Zhilo, Konstantin Kudi, and Vasiliy Pronin. "Quasidiffusion effects in fast gravitational flows of cohesionless particles of granular matter." Journal of Advanced Materials and Technologies 9, no. 4 (2024): 296–311. https://doi.org/10.17277/jamt.2024.04.pp.296-311.

Full text

Abstract:

The study analyzes the physical mechanisms behind the quasi-diffusive separation of cohesionless spherical particles in thin-layer fast gravity flows on a rough chute with substantial structural and kinematic parameter nonuniformity, with their complex size and density discrepancies. Studies have been conducted into alternative conditions of quasi-diffusive interaction of particles in a fast gravitational flow on a rough chute, which are defined by the dominance of the particles' relative velocities in the direction of gravitational shear or their chaotic fluctuations in the interaction. It ha

APA, Harvard, Vancouver, ISO, and other styles

11

Yang, Hengye, Gregory P. Bewley, and Silvia Ferrari. "A Fast-Tracking-Particle-Inspired Flow-Aided Control Approach for Air Vehicles in Turbulent Flow." Biomimetics 7, no. 4 (2022): 192. http://dx.doi.org/10.3390/biomimetics7040192.

Full text

Abstract:

Natural phenomena such as insect migration and the thermal soaring of birds in turbulent environments demonstrate animals’ abilities to exploit complex flow structures without knowledge of global velocity profiles. Similar energy-harvesting features can be observed in other natural phenomena such as particle transport in turbulent fluids. This paper presents a new feedback control approach inspired by experimental studies on particle transport that have recently illuminated particles’ ability to traverse homogeneous turbulence through the so-called fast-tracking effect. While in nature fast tr

APA, Harvard, Vancouver, ISO, and other styles

12

WU, JIAWEN, FENGQUAN ZHANG, and XUKUN SHEN. "GPU-BASED FLUID SIMULATION WITH FAST COLLISION DETECTION ON BOUNDARIES." International Journal of Modeling, Simulation, and Scientific Computing 03, no. 01 (2012): 1240003. http://dx.doi.org/10.1142/s179396231240003x.

Full text

Abstract:

In this paper, we present a method for fluid simulation based on smoothed particle hydrodynamic (SPH) with fast collision detection on boundaries on GPU. The major goal of our algorithm is to get a fast SPH simulation and rendering on GPU. Additionally, our algorithm has the following three features: At first, to make the SPH method GPU-friendly, we introduce a spatial hash method for neighbor search. After sorting the particles based on their grid index, neighbor search can be done quickly on GPU. Second, we propose a fast particle-boundary collision detection method. By precomputing the dist

APA, Harvard, Vancouver, ISO, and other styles

13

Zhu, Yuji, and Fang Shen. "Solar Energetic Particles Propagation under 3D Corotating Interaction Regions with Different Characteristic Parameters." Universe 10, no. 8 (2024): 315. http://dx.doi.org/10.3390/universe10080315.

Full text

Abstract:

Solar energetic particles (SEPs) are bursts of high-energy particles that originate from the Sun and can last for hours or even days. The aim of this study is to understand how the characteristics of energetic particles ware affected by the characteristic parameters of corotating interaction regions (CIRs). In particular, the particle intensity distribution with time and space in CIRs with different characteristics were studied. The propagation and acceleration of particles were described by the focused transport equation (FTE). We used a three-dimensional magnetohydrodynamic (MHD) model to si

APA, Harvard, Vancouver, ISO, and other styles

14

Zhang, Hao, Lorenzo Sironi, and Dimitrios Giannios. "Fast Particle Acceleration in Three-dimensional Relativistic Reconnection." Astrophysical Journal 922, no. 2 (2021): 261. http://dx.doi.org/10.3847/1538-4357/ac2e08.

Full text

Abstract:

Abstract Magnetic reconnection is invoked as one of the primary mechanisms to produce energetic particles. We employ large-scale 3D particle-in-cell simulations of reconnection in magnetically dominated (σ = 10) pair plasmas to study the energization physics of high-energy particles. We identify an acceleration mechanism that only operates in 3D. For weak guide fields, 3D plasmoids/flux ropes extend along the z-direction of the electric current for a length comparable to their cross-sectional radius. Unlike in 2D simulations, where particles are buried in plasmoids, in 3D we find that a fracti

APA, Harvard, Vancouver, ISO, and other styles

15

Lazarian, A., G. Kowal, E. de Gouveia Dal Pino, and E. Vishniac. "Particle acceleration in fast magnetic reconnection." Proceedings of the International Astronomical Union 6, S274 (2010): 62–71. http://dx.doi.org/10.1017/s1743921311006582.

Full text

Abstract:

AbstractOur numerical simulations show that the reconnection of magnetic field becomes fast in the presence of weak turbulence in the way consistent with the Lazarian & Vishniac (1999) model of fast reconnection. This process in not only important for understanding of the origin and evolution of the large-scale magnetic field, but is seen as a possibly efficient particle accelerator producing cosmic rays through the first order Fermi process. In this work we study the properties of particle acceleration in the reconnection zones in our numerical simulations and show that the particles can

APA, Harvard, Vancouver, ISO, and other styles

16

Yin, Zhao Qin, Jian Zhong Lin, and Li Juan Qian. "An Experimental Study on the Characteristics of Nanoparticles Emission from a Vehicle." Advanced Materials Research 508 (April 2012): 180–83. http://dx.doi.org/10.4028/www.scientific.net/amr.508.180.

Full text

Abstract:

The Fast Mobility Particle Sizer (FMPS) has been used to measure the particles number concentration and size distribution (6-560nm) of vehicle exhaust plume. The results reveal that vehicle exhaust contribute dominantly to the number concentration in the atmosphere particle. The particles total concentration decreases in the dispersion process. Furthermore, the transformation processes such as nucleation ,coagulation and condensation happen with dispersion process. Because of large number of nucleation mode particles, the coagulation process is in the advantage, which make the particles diamet

APA, Harvard, Vancouver, ISO, and other styles

17

Stansby, D., D. Perrone, L. Matteini, T. S. Horbury, and C. S. Salem. "Alpha particle thermodynamics in the inner heliosphere fast solar wind." Astronomy & Astrophysics 623 (February 28, 2019): L2. http://dx.doi.org/10.1051/0004-6361/201834900.

Full text

Abstract:

Context. Plasma processes occurring in the corona and solar wind can be probed by studying the thermodynamic properties of different ion species. However, most in situ observations of positive ions in the solar wind are taken at 1 AU, where information on their solar source properties may have been irreversibly erased. Aims. In this study we aim to use the properties of alpha particles at heliocentric distances between 0.3 AU and 1 AU to study plasma processes occurring at the points of observation, and to infer processes occurring inside 0.3 AU by comparing our results to previous remote sens

APA, Harvard, Vancouver, ISO, and other styles

18

Wu, Guorong, Zhanfei Zuo, and Yanggui Li. "Selection of Relative DEM Time Step for Modelling Fast Fluidized Bed of A-Type FCC Particles." Symmetry 15, no. 2 (2023): 488. http://dx.doi.org/10.3390/sym15020488.

Full text

Abstract:

In chemical production processes, the most suitable operation regime for A-Type powders such as typical FCC particles is high-speed fast fluidization owing to their uniquely advantageous properties. Discrete element method (DEM) for modelling fast fluidization with A-Type powders has rarely been reported. How to appropriately select the DEM time step and the stiffness coefficient is one of the most critical problems for stable and accurate calculation. This article mainly discusses the effect of the stiffness coefficient and DEM time step on simulations of A-type FCC particles. In order to des

APA, Harvard, Vancouver, ISO, and other styles

19

Zhang, Wanxin, Bingrui Huang, Sijie Meng, and Jihong Zhu. "Infrared Fast-Maneuvering Target Tracking Based on Robust Exact Differentiator with Improved Particle Filter." Journal of Robotics 2022 (October 21, 2022): 1–9. http://dx.doi.org/10.1155/2022/6406672.

Full text

Abstract:

This paper deals with the problem of nonlinear uncertainties when tracking an infrared dim small target with fast maneuvers. The particle filter (PF)-based methods are mostly considered. The existing improvement methods for the PF can handle the infrared dim small target with the conventional maneuver, the motion state of which changes slowly and in most cases is assumed to be linear. However, when fast maneuvers appear on the target, the PF-based method will soon suffer from particle degeneracy, or even loss of the target. In this paper, a robust exact differentiator (RED)-based particle gene

APA, Harvard, Vancouver, ISO, and other styles

20

Fu, Lin, Zhe Ji, Xiangyu Y. Hu, and Nikolaus A. Adams. "Parallel fast-neighbor-searching and communication strategy for particle-based methods." Engineering Computations 36, no. 3 (2019): 899–929. http://dx.doi.org/10.1108/ec-05-2018-0226.

Full text

Abstract:

Purpose This paper aims to develop a parallel fast neighbor search method and communication strategy for particle-based methods with adaptive smoothing-length on distributed-memory computing systems. Design/methodology/approach With a multi-resolution-based hierarchical data structure, the parallel neighbor search method is developed to detect and construct ghost buffer particles, i.e. neighboring particles on remote processor nodes. To migrate ghost buffer particles among processor nodes, an undirected graph is established to characterize the sparse data communication relation and is dynamica

APA, Harvard, Vancouver, ISO, and other styles

21

Kim, Kyou Hyun, Hoon Park, Jae Pyong Ahn, Jael Chul Lee, and Jong Ku Park. "HRTEM Study of Phase Transformation from Anatase to Rutile in Nanocrystalline TiO₂ Particles." Materials Science Forum 534-536 (January 2007): 65–68. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.65.

Full text

Abstract:

The spherical anatase TiO2 nanoparticle of 50 nm in diameter was manufactured by flame method and was subsequently heat-treated to investigate the transformation behavior from anatase to rutile using TEM observation. The anatase particle was facetted at the free surface and a neck formed between the anatase particles prior to the phase transformation. This resulted in the severe lattice distortion at the region of the interface. Unfortunately, we could not find the rutile grain nucleated in the anatase particle due to very fast grain growth. All the phase boundaries observed in HRTEM images ex

APA, Harvard, Vancouver, ISO, and other styles

22

Luo, Mei, Guanyi Wang, Aleksandar S. Mijailovic, et al. "How Graphite Particle Sizes Affect Fast Charging Performance of Ultra-Thin Layer Electrodes for Li- Ion Batteries." ECS Meeting Abstracts MA2023-01, no. 2 (2023): 504. http://dx.doi.org/10.1149/ma2023-012504mtgabs.

Full text

Abstract:

Extreme fast charging (XFC, ≤15 min) of lithium-ion batteries is highly desirable to accelerate mass market adoption of electric vehicles.[1] However, great capacity fading, as well as safety issues due to the lithium plating, limit its implementation. In this study, we investigated the fast-charging capability of graphite materials with various particle sizes under different charging currents up to 6C. To eliminate Li+ ion gradients effects across the thickness of electrode[2], ultra-thin layer graphite electrodes were developed to investigate the “real" fast-charging capability of graphite a

APA, Harvard, Vancouver, ISO, and other styles

23

Buncher, Brandon, and Matias Carrasco Kind. "Probabilistic cosmic web classification using fast-generated training data." Monthly Notices of the Royal Astronomical Society 497, no. 4 (2020): 5041–60. http://dx.doi.org/10.1093/mnras/staa2008.

Full text

Abstract:

ABSTRACT We present a novel method of robust probabilistic cosmic web particle classification in three dimensions using a supervised machine learning algorithm. Training data were generated using a simplified ΛCDM toy model with pre-determined algorithms for generating haloes, filaments, and voids. While this framework is not constrained by physical modelling, it can be generated substantially more quickly than an N-body simulation without loss in classification accuracy. For each particle in this data set, measurements were taken of the local density field magnitude and directionality. These

APA, Harvard, Vancouver, ISO, and other styles

24

Zhang, Jiaoshi, Steven Spielman, Yang Wang, et al. "Rapid measurement of RH-dependent aerosol hygroscopic growth using a humidity-controlled fast integrated mobility spectrometer (HFIMS)." Atmospheric Measurement Techniques 14, no. 8 (2021): 5625–35. http://dx.doi.org/10.5194/amt-14-5625-2021.

Full text

Abstract:

Abstract. The ability of aerosol particles to uptake water (hygroscopic growth) is an important determinant of aerosol optical properties and radiative effects. Aerosol hygroscopic growth is traditionally measured by humidified tandem differential mobility analyzers (HTDMA), in which size-selected dry particles are exposed to elevated relative humidity (RH), and the size distribution of humidified particles is subsequently measured using a scanning mobility particle sizer. As a scanning mobility particle sizer can measure only one particle size at a time, HTDMA measurements are time consuming,

APA, Harvard, Vancouver, ISO, and other styles

25

Trofymenko, Sergii, Igor Kyryllin, and Oleksandr Shchus. "On the Impact Parameter Dependence of the Ionization Energy Loss of Fast Negatively Charged Particles in an Oriented Crystal." 4, no. 4 (December 10, 2021): 68–75. http://dx.doi.org/10.26565/2312-4334-2021-4-07.

Full text

Abstract:

When a fast charged particle passes through matter, it loses some of its energy to the excitation and ionization of atoms. This energy loss is called ionization energy loss. In rather thin layers of matter, the value of such energy loss is stochastic. It is distributed in accordance with the law, which was first received by L.D. Landau. In amorphous substances, such a distribution (or spectrum), known as the Landau distribution, has a single maximum that corresponds to the most probable value of particle energy loss. When a particle moves in crystal in a planar channeling mode, the probability

APA, Harvard, Vancouver, ISO, and other styles

26

Syshchenko, V. V., A. I. Tarnovsky, and V. I. Dronik. "On anomalous diffusion of fast electrons through the silicon crystal." Poverhnostʹ. Rentgenovskie, sinhrotronnye i nejtronnye issledovaniâ, no. 9 (December 25, 2024): 95–100. https://doi.org/10.31857/s1028096024090125.

Full text

Abstract:

Anomalous diffusion is a random process in which the root-mean-square displacement of a particle from the starting point depends nonlinearly on time. The possibility of such behavior for high energy particles moving through the crystal under conditions close to axial channeling was found earlier. In this case, the rapid displacement of particles in a plane transverse to atomic strings (Lévi flights) is due to the temporary capture of the particles in planar channels. In this work, by means of numerical simulation, the anomalous diffusion exponent was found for different values of the energy of

APA, Harvard, Vancouver, ISO, and other styles

27

Tian, Xiao Feng, and Wei Ke Zhang. "Facile Synthesis of Flake Copper Powder Loaded With Silver Particles." Applied Mechanics and Materials 109 (October 2011): 91–95. http://dx.doi.org/10.4028/www.scientific.net/amm.109.91.

Full text

Abstract:

A fast and facile wet chemistry method has been developed for preparing monodispersed silver coated copper composite particles. Copper powder is coated using a solution containing [Ag (NH3)] +. The effect of the copper particle size distribution, the concentrations of [Ag (NH3)] + on composite particles conductivity were investigated. The composite particle with electric conductivity of 0.8×10-3 Ω•cm is obtained at 0.8 mol/L of Ag+ and1.0 g/L of dispersing agent. Copper powder loaded with silver particles morphologies range from individual particles to small islands, to the continuous multi-la

APA, Harvard, Vancouver, ISO, and other styles

28

Li, XiaoMing, ZiYi Wang, Yi Ying, and FangXiong Xiao. "Multipopulation Particle Swarm Optimization Algorithm with Neighborhood Learning." Scientific Programming 2022 (January 25, 2022): 1–20. http://dx.doi.org/10.1155/2022/8312450.

Full text

Abstract:

Particle swarm optimization (PSO) algorithm is widely used due to its fewer control parameters and fast convergence speed. However, as its learning strategy is only learning from the global optimal particle, the algorithm has the problem of low accuracy and easily falling into local optimization. In order to overcome this defect, a multipopulation particle swarm optimization algorithm with neighborhood learning (MPNLPSO) is proposed in this article. In MPNLPSO, a small-world network neighborhood learning strategy is proposed to make particles learn from the neighborhood optimal particles inste

APA, Harvard, Vancouver, ISO, and other styles

29

IWAI, T., C. W. HONG, and P. GREIL. "FAST PARTICLE PAIR DETECTION ALGORITHMS FOR PARTICLE SIMULATIONS." International Journal of Modern Physics C 10, no. 05 (1999): 823–37. http://dx.doi.org/10.1142/s0129183199000644.

Full text

Abstract:

New algorithms with O(N) complexity have been developed for fast particle-pair detections in particle simulations like the discrete element method (DEM) and molecular dynamic (MD). They exhibit robustness against broad particle size distributions when compared with conventional boxing methods. Almost similar calculation speeds are achieved at particle size distributions from is mono-size to 1:10 while the linked-cell method results in calculations more than 20 times. The basic algorithm, level-boxing, uses the variable search range according to each particle. The advanced method, multi-level b

APA, Harvard, Vancouver, ISO, and other styles

30

Hofer, M. Y., R. G. Marsden, T. R. Sanderson, and C. Tranquille. "From the Sun’s south to the north pole – Ulysses COSPIN/LET composition measurements at solar maximum." Annales Geophysicae 21, no. 6 (2003): 1383–91. http://dx.doi.org/10.5194/angeo-21-1383-2003.

Full text

Abstract:

Abstract. Based on elemental abundance ratios derived from the Ulysses COSPIN/LET measurements, we classified the energetic particle populations during and after the socalled Fast Latitude Scan – the time period during which the Ulysses spacecraft traveled from the highest heliolatitude south to maximum northern latitude, i.e. 27 November 2000 to 13 October 2001 – as being mixed between solar energetic particles (major component) and particles accelerated at stream interaction regions. During the fast latitude scan, the Ulysses spacecraft made the first transit in heliolatitude from pole to po

APA, Harvard, Vancouver, ISO, and other styles

31

John, J., P. Wollmer, M. Dahlback, A. Luts, and B. Jonson. "Tidal volume and alveolar clearance of insoluble particles." Journal of Applied Physiology 76, no. 2 (1994): 584–88. http://dx.doi.org/10.1152/jappl.1994.76.2.584.

Full text

Abstract:

We studied the effect of 3 h of large tidal volume ventilation on alveolar clearance of 0.63-micron fluorescent latex particles in rabbits during pentobarbital anesthesia. After particle deposition, six animals were killed as controls, six were subjected to large tidal volume ventilation with a peak pressure of 27 cmH2O, and six were subjected to conventional ventilation with a peak pressure of 11 cmH2O. Mean tidal volumes were 30.2 +/- 6.1 and 8.4 +/- 1.6 ml/kg in the large tidal volume and conventional groups, respectively. End-expiratory pressure was 2 cmH2O in all groups. Compliance decrea

APA, Harvard, Vancouver, ISO, and other styles

32

Zhevago, N. K., and V. I. Glebov. "Channeling of fast particles in fullerites." Journal of Experimental and Theoretical Physics 94, no. 6 (2002): 1121–33. http://dx.doi.org/10.1134/1.1493164.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Badziak, J. "Laser-driven generation of fast particles." Opto-Electronics Review 15, no. 1 (2007): 1–12. http://dx.doi.org/10.2478/s11772-006-0048-3.

Full text

Abstract:

AbstractThe great progress in high-peak-power laser technology has resulted recently in the production of ps and subps laser pulses of PW powers and relativistic intensities (up to 1021 W/cm2) and has laid the basis for the construction of multi-PW lasers generating ultrarelativistic laser intensities (above 1023 W/cm2). The laser pulses of such extreme parameters make it possible to produce highly collimated beams of electrons or ions of MeV to GeV energies, of short time durations (down to subps) and of enormous currents and current densities, unattainable with conventional accelerators. Suc

APA, Harvard, Vancouver, ISO, and other styles

34

Arias, Rodrigo, and H. Neal Bertram. "Fast thermal reversal of magnetic particles." Journal of Magnetism and Magnetic Materials 171, no. 1-2 (1997): 209–17. http://dx.doi.org/10.1016/s0304-8853(97)00053-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Suess, D., T. Schrefl, W. Scholz, and J. Fidler. "Fast switching of small magnetic particles." Journal of Magnetism and Magnetic Materials 242-245 (April 2002): 426–29. http://dx.doi.org/10.1016/s0304-8853(01)01140-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Wurz, Peter, and Lukas Gubler. "Fast microchannel plate detector for particles." Review of Scientific Instruments 67, no. 5 (1996): 1790–93. http://dx.doi.org/10.1063/1.1146975.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Scham, Moritz A. W., Dirk Krücker, Benno Käch, and Kerstin Borras. "DeepTreeGAN: Fast Generation of High Dimensional Point Clouds." EPJ Web of Conferences 295 (2024): 09010. http://dx.doi.org/10.1051/epjconf/202429509010.

Full text

Abstract:

In High Energy Physics, detailed and time-consuming simulations are used for particle interactions with detectors. To bypass these simulations with a generative model, the generation of large point clouds in a short time is required, while the complex dependencies between the particles must be correctly modelled. Particle showers are inherently tree-based processes, as each particle is produced by the decay or detector interaction of a particle of the previous generation. In this work, we present a novel Graph Neural Network model (DeepTreeGAN) that is able to generate such point clouds in a t

APA, Harvard, Vancouver, ISO, and other styles

38

Wu, Guorong, Qiang Li, and Zhanfei Zuo. "CFD-DEM Simulation of Fast Fluidization of Fine Particles in a Micro Riser." Processes 11, no. 8 (2023): 2417. http://dx.doi.org/10.3390/pr11082417.

Full text

Abstract:

In recent years, the discrete element method (DEM) has gradually been applied to the traditional fluidization simulation of fine particles in a micro fluidized bed (MFB). The application of DEM in the simulating fast fluidization of fine particles in MFB has not yet received attention. This article presents a drag model that relies on the surrounding environment of particles, namely the particle circumstance-dependent drag model or PCDD model. Fast fluidization in an MFB of fine particles is simulated using DEM based on the PCDD model. Simulations indicate that the local structure in an MFB ex

APA, Harvard, Vancouver, ISO, and other styles

39

Sánchez, Mario A., Juan C. Maya, Farid Chejne, Brennan Pecha, and Adriana M. Quinchía-Figueroa. "Mathematical Modeling of Multi-Phenomena Anisotropic Systems: Ejection of Primary Aerosols during the Fast Pyrolysis of Biomass." Mathematics 12, no. 6 (2024): 925. http://dx.doi.org/10.3390/math12060925.

Full text

Abstract:

This study introduces a novel particle model for biomass fast pyrolysis, incorporating an anisotropic cylindrical particle to address mass and energy transport coupled with aerosol ejection, which previous models have overlooked. The main contribution lies in developing a model that considers aerosol generation in anisotropic cylindrical particles for the first time, addressing bubbling dynamics and bursting within the liquid phase. The population balance equation describes bubble dynamics and aerosol formation, capturing phenomena like nucleation, growth, coalescence, and bursting. The model

APA, Harvard, Vancouver, ISO, and other styles

40

Lebensztayn, Elcio, Fábio Prates Machado та Mauricio Zuluaga Martinez. "Nonhomogeneous random walks systems on ℤ". Journal of Applied Probability 47, № 2 (2010): 562–71. http://dx.doi.org/10.1239/jap/1276784909.

Full text

Abstract:

We consider a random walks system on ℤ in which each active particle performs a nearest-neighbor random walk and activates all inactive particles it encounters. The movement of an active particle stops when it reaches a certain number of jumps without activating any particle. We prove that if the process relies on efficient particles (i.e. those particles with a small probability of jumping to the left) being placed strategically on ℤ, then it might survive, having active particles at any time with positive probability. On the other hand, we may construct a process that dies out eventually alm

APA, Harvard, Vancouver, ISO, and other styles

41

Lebensztayn, Elcio, Fábio Prates Machado та Mauricio Zuluaga Martinez. "Nonhomogeneous random walks systems on ℤ". Journal of Applied Probability 47, № 02 (2010): 562–71. http://dx.doi.org/10.1017/s0021900200006811.

Full text

Abstract:

We consider a random walks system on ℤ in which each active particle performs a nearest-neighbor random walk and activates all inactive particles it encounters. The movement of an active particle stops when it reaches a certain number of jumps without activating any particle. We prove that if the process relies on efficient particles (i.e. those particles with a small probability of jumping to the left) being placed strategically on ℤ, then it might survive, having active particles at any time with positive probability. On the other hand, we may construct a process that dies out eventually alm

APA, Harvard, Vancouver, ISO, and other styles

42

Qi, Bin, Jin Tian, Jinjin Wang, and Guolong Liang. "Fast Track Smoothing Algorithm for Underwater Target Tracking Based on KD Tree." Journal of Physics: Conference Series 2486, no. 1 (2023): 012086. http://dx.doi.org/10.1088/1742-6596/2486/1/012086.

Full text

Abstract:

Abstract A fast-track smoothing algorithm based on the KD Tree is proposed to address the problem of state estimation in underwater multi-target tracking. For multi-target tracking, the multi-Bernoulli filter becomes intractable due to the high-dimensional nature of the posterior. This problem can be overcome by the particle filter (PF), which approximates the posterior by a set of weighted samples (“particles”). The probability distribution of the multi-Bernoulli algorithm based on this algorithm contains a series of particles with weights. Therefore, while smoothing it, the state transfer pr

APA, Harvard, Vancouver, ISO, and other styles

43

Mileva, Daniela, Jingbo Wang, Markus Gahleitner, Katalee Jariyavidyanont, and René Androsch. "New Insights into Crystallization of Heterophasic Isotactic Polypropylene by Fast Scanning Chip Calorimetry." Polymers 12, no. 8 (2020): 1683. http://dx.doi.org/10.3390/polym12081683.

Full text

Abstract:

The crystallization kinetics of metallocene-catalyzed heterophasic isotactic polypropylene composed of a matrix of isotactic polypropylene (iPP) and rubbery particles made of random ethylene–propylene copolymers (EPC), often denoted as heterophasic iPP copolymers, was analyzed as a function of the cooling rate and supercooling in nonisothermal and isothermal crystallization experiments, respectively. Fast scanning chip calorimetry (FSC) allowed assessing crystallization at processing-relevant conditions, and variation of the content (0–39 wt %) and composition (0–35 wt % propylene counits) of

APA, Harvard, Vancouver, ISO, and other styles

44

Wijsen, N., A. Aran, J. Pomoell, and S. Poedts. "Modelling three-dimensional transport of solar energetic protons in a corotating interaction region generated with EUHFORIA." Astronomy & Astrophysics 622 (January 28, 2019): A28. http://dx.doi.org/10.1051/0004-6361/201833958.

Full text

Abstract:

Aims. We introduce a new solar energetic particle (SEP) transport code that aims at studying the effects of different background solar wind configurations on SEP events. In this work, we focus on the influence of varying solar wind velocities on the adiabatic energy changes of SEPs and study how a non-Parker background solar wind can trap particles temporarily at small heliocentric radial distances (≲1.5 AU) thereby influencing the cross-field diffusion of SEPs in the interplanetary space. Methods. Our particle transport code computes particle distributions in the heliosphere by solving the fo

APA, Harvard, Vancouver, ISO, and other styles

45

Zhang, Hu, Zichuan Yi, Liming Liu, et al. "A Fast-Response Driving Waveform Design Based on High-Frequency Voltage for Three-Color Electrophoretic Displays." Micromachines 13, no. 1 (2021): 59. http://dx.doi.org/10.3390/mi13010059.

Full text

Abstract:

Three-color electrophoretic displays (EPDs) have the characteristics of colorful display, reflection display, low power consumption, and flexible display. However, due to the addition of red particles, response time of three-color EPDs is increased. In this paper, we proposed a new driving waveform based on high-frequency voltage optimization and electrophoresis theory, which was used to shorten the response time. The proposed driving waveform was composed of an activation stage, a new red driving stage, and a black or white driving stage. The response time of particles was effectively reduced

APA, Harvard, Vancouver, ISO, and other styles

46

Rantala, Antti, Pauli Pihajoki, Matias Mannerkoski, Peter H. Johansson, and Thorsten Naab. "mstar – a fast parallelized algorithmically regularized integrator with minimum spanning tree coordinates." Monthly Notices of the Royal Astronomical Society 492, no. 3 (2020): 4131–48. http://dx.doi.org/10.1093/mnras/staa084.

Full text

Abstract:

ABSTRACT We present the novel algorithmically regularized integration method mstar for high-accuracy (|ΔE/E| ≳ 10−14) integrations of N-body systems using minimum spanning tree coordinates. The twofold parallelization of the $\mathcal {O}(N_\mathrm{part}^2)$ force loops and the substep divisions of the extrapolation method allow for a parallel scaling up to NCPU = 0.2 × Npart. The efficient parallel scaling of mstar makes the accurate integration of much larger particle numbers possible compared to the traditional algorithmic regularization chain (ar-chain) methods, e.g. Npart = 5000 particles

APA, Harvard, Vancouver, ISO, and other styles

47

Zhang, Z., and A. Prosperetti. "A Method for Particle Simulation." Journal of Applied Mechanics 70, no. 1 (2003): 64–74. http://dx.doi.org/10.1115/1.1530636.

Full text

Abstract:

This paper extends a recent approach to the direct numerical simulation of particle flows to the case in which the particles are not fixed. The basic idea is to use a local analytic representation valid near the particle to “transfer” the no-slip condition from the particle surface to the adjacent grid nodes. In this way the geometric complexity arising from the irregular relation between the particle boundary and the underlying mesh is avoided and fast solvers can be used. The results suggest that the computational effort increases only slowly with the number of particles so that the method i

APA, Harvard, Vancouver, ISO, and other styles

48

Zuo, Tao, Huasong Min, Quan Tang, and Qiang Tao. "A Robot SLAM Improved by Quantum-Behaved Particles Swarm Optimization." Mathematical Problems in Engineering 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/1596080.

Full text

Abstract:

We propose a new SLAM method based on fast simultaneous localization and mapping (FastSLAM). The technique presented uses an improved quantum-behaved particles swarm optimization (QPSO) to improve the proposal distribution of particles and optimize the estimated particles. This method makes the sampled particles closer to the true pose of the robot and improves the estimation accuracy of robot poses and landmarks. In the QPSO algorithm, the Gaussian disturbance is added to increase the diversity of the particles. By using this technique the premature convergence of particles swarm is overcome.

APA, Harvard, Vancouver, ISO, and other styles

49

Agus, Joanne, Carlito Lebrilla, Christopher Rhodes, et al. "Prolonged Fasting Alters the Size, Function, and Glycoproteomic Profile of HDL Particles." Current Developments in Nutrition 6, Supplement_1 (2022): 435. http://dx.doi.org/10.1093/cdn/nzac057.001.

Full text

Abstract:

Abstract Objectives To investigate the effects of a single 36-hour fast on HDL glycoproteomic composition on isolated HDL particles. Methods We obtained plasma from a previous study where 20 healthy subjects, age 20–40, fasted for 36 hours. HDL was isolated using density-based ultracentrifugation steps, followed by size-exclusion chromatography. Glycoproteomic was analyzed using a targeted LC-MS/MS method, and lipoprotein particle size distribution analysis using nuclear magnetic resonance (NMR) spectroscopy. Results HDL-associated apolipoprotein A-IV (ApoA-IV) content was significantly reduce

APA, Harvard, Vancouver, ISO, and other styles

50

Wang, H. D., C. N. Zhang, H. Zhang, Y. C. Wei, and X. L. Guan. "A Quantum Particle Swarm Optimization Algorithm Based on Aggregation Perturbation." Applied Science and Innovative Research 7, no. 4 (2023): p21. http://dx.doi.org/10.22158/asir.v7n4p21.

Full text

Abstract:

A quantum particle swarm hybrid optimization algorithm based on aggregation disturbance is proposed for inventory cost control. This algorithm integrates the K-means algorithm on the basis of traditional particle swarm optimization, recalculates the clustering center, initializes stagnant particles, and solves the problem of particle aggregation. Introducing chaos mechanism into the algorithm, changing the position of particles, enhancing their activity, and improving the algorithm's global optimization ability. At the same time, define the aggregation disturbance factor, determine the current

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!