Three-Dimensional Vortical Structure and Diffusion Mechanism of an Excited Rectangular Jet

1999 ◽  
pp. 319-328
Author(s):  
K. Toyoda ◽  
R. Hiramoto
Keyword(s):  
Vortical Structure ◽  
Diffusion Mechanism ◽  
Three Dimensional ◽  
Rectangular Jet ◽  
And Diffusion

314 Study on Three-Dimensional Vortical Structure in a Rectangular Jet by Large Eddy Simulation(2)

2007 ◽  
Vol 2007 (0) ◽  
pp. _314-1_-_314-4_
Author(s):  
Hiroyuki TATEYAMA ◽  
Kuniaki TOYODA ◽  
Nobuyuki OSHIMA ◽  
Shota CHATANI ◽  
Riho HIRAMOTO
Keyword(s):  
Large Eddy Simulation ◽  
Vortical Structure ◽  
Three Dimensional ◽  
Eddy Simulation ◽  
Rectangular Jet ◽  
Large Eddy

314 Study on Three-Dimensional Vortical Structure in a Rectangular Jet by Large Eddy Simulation(1)

2007 ◽  
Vol 2007 (0) ◽  
pp. _314-a_
Author(s):  
Hiroyuki TATEYAMA ◽  
Kuniaki TOYODA ◽  
Nobuyuki OSHIMA ◽  
Shota CHATANI ◽  
Riho HIRAMOTO
Keyword(s):  
Large Eddy Simulation ◽  
Vortical Structure ◽  
Three Dimensional ◽  
Eddy Simulation ◽  
Rectangular Jet ◽  
Large Eddy

scholarly journals Visualization of Three-Dimensional Vortical Structure in a Rectangular Jet by Large Eddy Simulation

2007 ◽  
Vol 27 (Supplement2) ◽  
pp. 53-54
Author(s):  
Hiroyuki TATEYAMA ◽  
Kuniaki TOYODA ◽  
Nobuyuki OSHIMA ◽  
Shota CHATANI ◽  
Riho HIRAMOTO
Keyword(s):  
Large Eddy Simulation ◽  
Vortical Structure ◽  
Three Dimensional ◽  
Eddy Simulation ◽  
Rectangular Jet ◽  
Large Eddy

scholarly journals Adaptive Chaotic Image Encryption Algorithm Based on RNA and Pixel Depth

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1770
Author(s):  
Xiaoqiang Zhang ◽  
Xuangang Yan
Keyword(s):  
Image Encryption ◽  
Three Dimensional ◽  
Encryption Algorithm ◽  
Current Time ◽  
Plain Image ◽  
Scope Of Application ◽  
Selective Diffusion ◽  
Chaotic Image Encryption ◽  
And Diffusion ◽  
Image Encryption Algorithm

To prevent the leakage of image content, image encryption technology has received increasing attention. Most current algorithms are only suitable for the images of certain types and cannot update keys in a timely manner. To tackle such problems, we propose an adaptive chaotic image encryption algorithm based on RNA and pixel depth. Firstly, a novel chaotic system, two-dimensional improved Logistic-adjusted-Sine map is designed. Then, we propose a three-dimensional adaptive Arnold transform for scrambling. Secondly, keys are generated by the hash values of the plain image and current time to achieve one-image, one-key, and one-time pad simultaneously. Thirdly, we build a pre-permuted RNA cube for 3D adaptive scrambling by pixel depth, chaotic sequences, and adaptive RNA coding. Finally, selective diffusion combined with pixel depth and RNA operations is performed, in which the RNA operators are determined by the chemical structure and properties of amino acids. Pixel depth is integrated into the whole procedure of parameter generation, scrambling, and diffusion. Experiments and algorithm analyses show that our algorithm has strong security, desirable performance, and a broader scope of application.

Fast (non-)diffusive Quasi-Geostrophic Magneto-Coriolis Modes in the Earth's core

2021 ◽  
Author(s):  
Felix Gerick ◽  
Dominique Jault ◽  
Jerome Noir
Keyword(s):  
Magnetic Field ◽  
Magnetic Energy ◽  
Three Dimensional ◽  
Outer Core ◽  
Equatorial Region ◽  
Earth’S Core ◽  
Earth's Core ◽  
Strong Focusing ◽  
Geomagnetic Observations ◽  
And Diffusion

<p> Fast changes of Earth's magnetic field could be explained by inviscid and diffusion-less quasi-geostrophic (QG) Magneto-Coriolis modes. We present a hybrid QG model with columnar flows and three-dimensional magnetic fields and find modes with periods of a few years at parameters relevant to Earth's core. These fast Magneto-Coriolis modes show strong focusing of their kinetic and magnetic energy in the equatorial region, while maintaining a relatively large spatial structure along the azimuthal direction. Their properties agree with some of the observations and inferred core flows. We find additionally, in contrast to what has been assumed previously, that these modes are not affected significantly by magnetic diffusion. The model opens a new way of inverting geomagnetic observations to the flow and magnetic field deep within the Earth's outer core.</p>

Three-dimensional Vortex structure of Rectangular Jet with Tapered Triangular Tubes at Nozzle Four Corners

2021 ◽  
Vol 2021.58 (0) ◽  
pp. F023
Author(s):  
Naoki KAJITANI ◽  
Takahiro KIWATA ◽  
Takaaki KONO ◽  
Nobuyoshi KOMATSU ◽  
Riku OUCHI
Keyword(s):  
Vortex Structure ◽  
Three Dimensional ◽  
Rectangular Jet ◽  
Four Corners

scholarly journals Small Oligonucleotides Detection in Three-Dimensional Polymer Network of DNA-PEG Hydrogels

2021 ◽  
Author(s):  
Alessia Mazzarotta ◽  
Tania Maristella Caputo ◽  
Luca Raiola ◽  
Edmondo Battista ◽  
Paolo Antonio Netti ◽  
...  
Keyword(s):  
Polymer Network ◽  
Three Dimensional ◽  
Mesh Size ◽  
Short Oligonucleotide ◽  
Dna Oligonucleotides ◽  
Hydrogel Network ◽  
Displacement Assay ◽  
Oligonucleotide Detection ◽  
Biomolecules Detection ◽  
And Diffusion

The control of the three-dimensional (3D) polymer network structure is important for permselective materials when specific biomolecules detection is needed. Here we investigate conditions to obtain a tailored hydrogel network that combine both molecular filtering and molecular capture capabilities for biosensing applications. Along this line short oligonucleotide detection in a displacement assay is set within PEGDA hydrogels synthetized by UV radical photopolymerization. To provide insights on the molecular filter capability, diffusion studies of several probes (sulforhodamine G and dextrans) with different hydrodynamic radii were carried out using NMR technique. Moreover, fluorometric analyses of hybridization of DNA oligonucleotides inside PEGDA-hydrogels shed light on the mechanisms of recognition in 3D, highlighting that mesh size and crowding effect greatly impact of hybridization mechanism onto polymer network. Finally, we found the best probe density and diffusion transport conditions to allow the specific oligonucleotide capture and detection inside PEGDA-hydrogels for oligonucleotide detection and the filtering out of higher molecular weight molecules.

scholarly journals Pollution Monitoring Based on Vehicle-borne Particulate Quantum Lidar

2020 ◽  
Vol 237 ◽  
pp. 03023
Author(s):  
Xu Wang ◽  
Jing Gao ◽  
Yuefeng Zhao
Keyword(s):  
Environmental Protection ◽  
Dimensional Space ◽  
Three Dimensional ◽  
High Energy ◽  
Pollution Monitoring ◽  
Observation Area ◽  
Surrounding Areas ◽  
Environmental Network ◽  
And Diffusion ◽  
Three Dimensional Space

From February 7 to 10, 2018, due to unfavorable meteorological conditions, a process of air pollution occurred in Hefei and its surrounding areas, and moderate to severe pollution occurred in the municipal districts. Aiming at the pollution process in Hefei City, under the leadership of Hefei Environmental Protection Bureau and with the support of Hefei Environmental Protection Sub-bureau, four fixed observation points were selected to carry out all-weather environmental network monitoring pilot projects in Hefei municipal jurisdiction area. At the same time, a "mobile monitoring vehicle of atmospheric environmental pollution" was arranged to conduct all-weather walking observation to real-time monitor the spatial distribution and three-dimensional space of pollutants in Hefei urban area、inter-transport and space subsidence and diffusion. The RaySound Series Portable high-energy high-frequency lidar was used in the environmental networking monitoring in Hefei. The air quality in the observation area was evaluated comprehensively by using the mode of fixed vertical monitoring, plane scanning monitoring and mobile walking monitoring.

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