Статті в журналах: "Two-component vector"

1

Adamashvili, G. T. "Two-Component Vector Breather." Technical Physics Letters 47, no. 7 (July 2021): 532–34. http://dx.doi.org/10.1134/s106378502106002x.

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2

Hong Li, Hong Li. "Propagation and interaction of two-component vector dark solitons in the defocusing nonlinear media." Chinese Optics Letters 11, s2 (2013): S21902–321905. http://dx.doi.org/10.3788/col201311.s21902.

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3

Lyuksyutov, I., and E. Bauer. "Uniaxial incommensurate overlayers with two-component displacement vector." Surface Science 223, no. 3 (December 1989): 424–40. http://dx.doi.org/10.1016/0039-6028(89)90671-7.

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4

Lyuksyutov, I., and E. Bauer. "Uniaxial incommensurate overlayers with two-component displacement vector." Surface Science Letters 223, no. 3 (December 1989): A590. http://dx.doi.org/10.1016/0167-2584(89)90894-3.

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5

Duan, Yishi, and Hong Zhang. "Line defects of a two-component vector order parameter." Physical Review E 60, no. 3 (September 1, 1999): 2568–76. http://dx.doi.org/10.1103/physreve.60.2568.

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6

Li, D. Y., and C. W. MacKinnon. "Indexing of incommensurate satellite reflections in X-ray powder diffraction pattern of (Bi, Pb)2Sr2Ca2Cu3Ox (2223) phase." Powder Diffraction 12, no. 3 (September 1997): 141–44. http://dx.doi.org/10.1017/s088571560000960x.

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X-ray powder diffraction data and refined unit cell parameters for the (Bi, Pb)2Sr2Ca2Cu3Ox (2223) superconducting phase, indexed using incommensurate modulation principles, are reported. Comparison of the results obtained with one- and two-component modulation wave vectors showed that the two-component modulation wave vector is superior for indexing the satellite reflections. A two-component wave vector indexing result seems likely when only the powder diffraction data are considered.

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7

Amarante Ribeiro, L. A., and P. R. Silva. "Solitary Waves in a Two-Component Classical Vector Field Model." physica status solidi (b) 175, no. 1 (January 1, 1993): K5—K8. http://dx.doi.org/10.1002/pssb.2221750128.

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8

Albanese, R., and G. Rubinacci. "Magnetostatic field computations in terms of two-component vector potentials." International Journal for Numerical Methods in Engineering 29, no. 3 (March 1990): 515–32. http://dx.doi.org/10.1002/nme.1620290305.

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9

Ji, Yi, and Hong-Bo Xie. "Myoelectric signal classification based on S transform and two-directional two-dimensional principal component analysis." Transactions of the Institute of Measurement and Control 40, no. 7 (May 8, 2017): 2387–95. http://dx.doi.org/10.1177/0142331217704035.

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Time-frequency representiation has been intensively employed for the analysis of biomedical signals. In order to extract discriminative information, time-frequency matrix is often transformed into a 1D vector followed by principal component analysis (PCA). This study contributes a two-directional two-dimensional principal component analysis (2D2PCA)-based technique for time-frequency feature extraction. The S transform, integrating the strengths of short time Fourier transform and wavelet transform, is applied to perform the time-frequency decomposition. Then, 2D2PCA is directly conducted on the time-frequency matrix rather than 1D vectors for feature extraction. The proposed method can significantly reduce the computational cost while capture the directions of maximal time-frequency matrix variance. The efficiency and effectiveness of the proposed method is demonstrated by classifying eight hand motions using 4-channel myoelectric signals recorded in health subjects and amputees.

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10

Kirwan, A. D., and Mehrdad Massoudi. "The Heat Flux Vector(s) in a Two Component Fluid Mixture." Fluids 5, no. 2 (May 20, 2020): 77. http://dx.doi.org/10.3390/fluids5020077.

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Bulk kinematic properties of mixtures such as velocity are known to be the density weighed averages of the constituent velocities. No such paradigm exists for the heat flux of mixtures when the constituents have different temperatures. Using standard principles such as frame indifference, we address this topic by developing linear constitutive equations for the constituent heat fluxes, the interaction force between constituents, and the stresses for a mixture of two fluids. Although these equations contain 18 phenomenological coefficients, we are able to use the Clausius-Duhem inequality to obtain inequalities involving the principal and cross flux coefficients. The theory is applied to some special cases and shown to reduce to standard results when the constituents have the same temperature.

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11

Wang, Xiu-Bin, and Bo Han. "Vector Nonlinear Waves in a Two-Component Bose–Einstein Condensate System." Journal of the Physical Society of Japan 89, no. 12 (December 15, 2020): 124003. http://dx.doi.org/10.7566/jpsj.89.124003.

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12

Ramesh Kumar, V., R. Radha, and Miki Wadati. "Collision of bright vector solitons in two-component Bose–Einstein condensates." Physics Letters A 374, no. 35 (August 2010): 3685–94. http://dx.doi.org/10.1016/j.physleta.2010.07.016.

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13

Xu, Qingda, Guojun Zhang, Junwen Ding, Renxin Wang, Yu Pei, Ziming Ren, Zhenzhen Shang, Chenyang Xue, and Wendong Zhang. "Design and implementation of two-component cilia cylinder MEMS vector hydrophone." Sensors and Actuators A: Physical 277 (July 2018): 142–49. http://dx.doi.org/10.1016/j.sna.2018.05.005.

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14

Xu, Ling, Deng-Shan Wang, Xiao-Yong Wen, and Yao-Lin Jiang. "Exotic Localized Vector Waves in a Two-Component Nonlinear Wave System." Journal of Nonlinear Science 30, no. 2 (September 14, 2019): 537–64. http://dx.doi.org/10.1007/s00332-019-09581-0.

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15

Xun-Xu, Liu, Zhang Xiao-Fei, and Zhang Peng. "Vector Solitons and Soliton Collisions in Two-Component Bose–Einstein Condensates." Chinese Physics Letters 27, no. 7 (July 2010): 070306. http://dx.doi.org/10.1088/0256-307x/27/7/070306.

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16

Kevrekidis, P. G., and D. E. Pelinovsky. "Discrete vector on-site vortices." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462, no. 2073 (April 4, 2006): 2671–94. http://dx.doi.org/10.1098/rspa.2006.1693.

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We study discrete vortices in coupled discrete nonlinear Schrödinger equations. We focus on the vortex cross configuration that has been experimentally observed in photorefractive crystals. Stability of the single-component vortex cross in the anti-continuum limit of small coupling between lattice nodes is proved. In the vector case, we consider two coupled configurations of vortex crosses, namely the charge-one vortex in one component coupled in the other component to either the charge-one vortex (forming a double-charge vortex) or the charge-negative-one vortex (forming a, so-called, hidden-charge vortex). We show that both vortex configurations are stable in the anti-continuum limit, if the parameter for the inter-component coupling is small and both of them are unstable when the coupling parameter is large. In the marginal case of the discrete two-dimensional Manakov system, the double-charge vortex is stable while the hidden-charge vortex is linearly unstable. Analytical predictions are corroborated with numerical observations that show good agreement near the anti-continuum limit, but gradually deviate for larger couplings between the lattice nodes.

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17

Wang, Qiang, Lin Wen, and Zai-Dong Li. "Feshbach resonance management of vector solitons in two-component Bose—Einstein condensates." Chinese Physics B 21, no. 8 (August 2012): 080501. http://dx.doi.org/10.1088/1674-1056/21/8/080501.

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18

Li, Hong. "Effects of varying nonlocality on dynamics of two-component vector spatial solitons." Waves in Random and Complex Media 24, no. 2 (April 3, 2014): 191–202. http://dx.doi.org/10.1080/17455030.2014.901583.

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19

Albanese, R., and G. Rubinacci. "Treatment of multiply connected regions in two-component electric vector potentials formulations." IEEE Transactions on Magnetics 26, no. 2 (March 1990): 650–53. http://dx.doi.org/10.1109/20.106401.

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20

Li, Ning, Deyi Yuan, and Li-Jun Huang. "Development of a Gateway-compatible two-component expression vector system for plants." Transgenic Research 28, no. 5-6 (August 21, 2019): 561–72. http://dx.doi.org/10.1007/s11248-019-00167-w.

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21

Hedrih, Katica R. (Stevanović), and Ljiljana Veljović. "Vector Rotators of Rigid Body Dynamics with Coupled Rotations around Axes without Intersection." Mathematical Problems in Engineering 2011 (2011): 1–26. http://dx.doi.org/10.1155/2011/351269.

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Vector method based on mass moment vectors and vector rotators coupled for pole and oriented axes is used for obtaining vector expressions for kinetic pressures on the shaft bearings of a rigid body dynamics with coupled rotations around axes without intersection. Mass inertia moment vectors and corresponding deviational vector components for pole and oriented axis are defined by K. Hedrih in 1991. These kinematical vectors rotators are defined for a system with two degrees of freedom as well as for rheonomic system with two degrees of mobility and one degree of freedom and coupled rotations around two coupled axes without intersection as well as their angular velocities and intensity. As an example of defined dynamics, we take into consideration a heavy gyrorotor disk with one degree of freedom and coupled rotations when one component of rotation is programmed by constant angular velocity. For this system with nonlinear dynamics, a series of tree parametric transformations of system nonlinear dynamics are presented. Some graphical visualization of vector rotators properties are presented too.

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22

Berrios Saavedra, Gerardine, Dominik Utz, Santiago Vargas Domínguez, José Iván Campos Rozo, Sergio Javier González Manrique, Peter Gömöry, Christoph Kuckein, Horst Balthasar, and Peter Zelina. "Observational evidence for two-component distributions describing solar magnetic bright points." Astronomy & Astrophysics 657 (January 2022): A79. http://dx.doi.org/10.1051/0004-6361/202141231.

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Context. High-resolution observations of the solar photosphere reveal the presence of fine structures, in particular the so-called Magnetic Bright Points (MBPs), which are small-scale features associated with strong magnetic field regions of the order of kilogauss (kG). It is especially relevant to study these magnetic elements, which are extensively detected in all moments during the solar cycle, in order to establish their contribution to the behavior of the solar atmosphere, and ultimately a plausible role within the coronal heating problem. Aims. Characterisation of size and velocity distributions of MBPs in the solar photosphere in two different datasets of quiet Sun images acquired with high-resolution solar instruments i.e. Solar Optical Telescope SOT/Hinode and the High-resolution Fast Imager HiFI/GREGOR, in the G-band (4308 Å). Methods. In order to detect the MBPs, an automatic segmentation and identification algorithm is used. Next, the identified features were tracked to measure their proper motions. Finally, a statistical analysis of hundreds of MBPs is carried out, generating histograms for areas, diameters and horizontal velocities. Results. This work establishes that areas and diameters of MBPs display log-normal distributions that are well-fitted by two different components, whereas the velocity vector components follow Gaussians and the vector magnitude a Rayleigh distribution revealing again for all vector elements a two component composition. Conclusions. The results can be interpreted as due to the presence of two different populations of MBPs in the solar photosphere one likely related to stronger network magnetic flux elements and the other one to weaker intranetwork flux elemens. In particular this work concludes on the effect of the different spatial resolution of GREGOR and Hinode telescopes, affecting detections and average values.

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23

Loth, J. L. "Aerodynamic Tower Shake Force Analysis for VAWT." Journal of Solar Energy Engineering 107, no. 1 (February 1, 1985): 45–49. http://dx.doi.org/10.1115/1.3267652.

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Vertical axis wind turbines (VAWT) are subjected to blade lift forces which vary continuously in both magnitude and direction. These blade lift forces are transmitted via the blade support arms to the tower. The resulting tower force vector is a composite of: a downwind and a crosswind average force component, rotating force vectors, and force vectors oscillating in the crosswind direction. The frequency of the rotating and oscillating forces are multiples of the product of Bω, where B is the number of blades used and ω is the rotor angular velocity. The magnitude of the largest tower shake force vector is of the same order as the average downwind force component, and may represent a serious design constraint in the calculation of the required tower stiffness. A closed-form solution for the tower force vectors has been derived, by introducing a suitable wind interference model. It shows that the magnitude of the largest tower shake force vector, using a three-bladed rotor, is four times smaller than with a two-bladed rotor. The Betz limit and the optimum tip speed ratio as a function of solidity has been derived by comparison with two semicylindrical actuators in series.

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24

Peiris, M. Shelton. "Some Aspects of Forecasting with Vector Moving Average Processes." Calcutta Statistical Association Bulletin 44, no. 3-4 (September 1994): 151–56. http://dx.doi.org/10.1177/0008068319940302.

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This paper considers forecasts of the sum of a particular component of two independent Gaussian vector moving average processes. The efficiency of forecasts are compared via ( a) the corresponding component models, ( b) the joint vector models and ( c) the combined joint vector model.

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25

Wang, Y. S., B. W. Jeng, and C. S. Chien. "A Two-Parameter Continuation Method for Rotating Two-Component Bose-Einstein Condensates in Optical Lattices." Communications in Computational Physics 13, no. 2 (February 2013): 442–60. http://dx.doi.org/10.4208/cicp.110711.170212a.

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AbstractWe study efficient spectral-collocation and continuation methods (SCCM) for rotating two-component Bose-Einstein condensates (BECs) and rotating two-component BECs in optical lattices, where the second kind Chebyshev polynomials are used as the basis functions for the trial function space. A novel two-parameter continuation algorithm is proposed for computing the ground state and first excited state solutions of the governing Gross-Pitaevskii equations (GPEs), where the classical tangent vector is split into two constraint conditions for the bordered linear systems. Numerical results on rotating two-component BECs and rotating two-component BECs in optical lattices are reported. The results on the former are consistent with the published numerical results.

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26

Devyatisil’nyi, A. S. "Model of vector gravimetry based on a correctable two-component inertial navigation system." Technical Physics 57, no. 12 (December 2012): 1730–32. http://dx.doi.org/10.1134/s1063784212120092.

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27

Xu, Si-Liu, Jun-Rong He, Li Xue, and Milivoj R. Belić. "Vector matter waves in two-component Bose-Einstein condensates with spatially modulated nonlinearities." EPL (Europhysics Letters) 121, no. 3 (February 1, 2018): 34004. http://dx.doi.org/10.1209/0295-5075/121/34004.

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28

Biro, O. "Use of a two-component vector potential for 3-D eddy current calculations." IEEE Transactions on Magnetics 24, no. 1 (1988): 102–5. http://dx.doi.org/10.1109/20.43866.

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29

Zhong, Wei-Ping, and Milivoj Belić. "Two-component vector solitons in defocusing Kerr-type media with spatially modulated nonlinearity." Annals of Physics 351 (December 2014): 787–96. http://dx.doi.org/10.1016/j.aop.2014.10.003.

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30

Li, Hong, D. N. Wang, and Yongshan Cheng. "Dynamics of dark–bright vector solitons in a two-component Bose–Einstein condensate." Chaos, Solitons & Fractals 39, no. 4 (February 2009): 1988–93. http://dx.doi.org/10.1016/j.chaos.2007.06.063.

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31

Chen, Weishi, Tiejun Liu, and Baofa Wang. "Ultrasonic image classification based on support vector machine with two independent component features." Computers & Mathematics with Applications 62, no. 7 (October 2011): 2696–703. http://dx.doi.org/10.1016/j.camwa.2011.06.051.

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32

Wang, Hongwei. "Noise elimination by the use of vector resolution." GEOPHYSICS 55, no. 9 (September 1990): 1191–201. http://dx.doi.org/10.1190/1.1442935.

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This paper introduces the concept of the Unit Similarity Vector (USV) which is based on the hypothesis that signals on adjacent channels are similar, and then discusses how the amplitude vector formed in a multichannel environment, is resolved into two components—the similarity component and the dissimilarity component. The signal‐to‐noise ratio can be enhanced by compressing the dissimilarity component. Excellent results are obtained using the method with surface seismic data, and satisfactory results are also obtained with three‐component VSP data sets.

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33

Harikiran, Jonnadula Dr J. Harikiran. "Hyperspectral image classification using support vector machines." IAES International Journal of Artificial Intelligence (IJ-AI) 9, no. 4 (December 1, 2020): 684. http://dx.doi.org/10.11591/ijai.v9.i4.pp684-690.

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In this paper, a novel approach for hyperspectral image classification technique is presented using principal component analysis (PCA), bidimensional empirical mode decomposition (BEMD) and support vector machines (SVM). In this process, using PCA feature extraction technique on Hyperspectral Dataset, the first principal component is extracted. This component is supplied as input to BEMD algorithm, which divides the component into four parts, the first three parts represents intrensic mode functions (IMF) and last part shows the residue. These BIMFs and residue image is further taken as input to the SVM for classification. The results of experiments on two popular datasets of hyperspectral remote sensing scenes represent that the proposed-model offers a competitive analyticalperformance in comparison to some established methods.

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34

Malecka-Massalska, Teresa, Agata Smolen, Elzbieta Madro, and Wojciech Surtel. "Bioimpedance Vector Pattern in Taiwanese and Polish College Students Detected by Bioelectric Impedance Vector Analysis: Preliminary Observations." Scientific World Journal 2012 (2012): 1–5. http://dx.doi.org/10.1100/2012/684865.

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Background and Objectives. The study was conducted to evaluate soft tissue hydration and mass through pattern analysis of vector plots as height, normalized resistance, and reactance measurements by bioelectric impedance vector analysis in Taiwanese and Polish college students.Methods. Whole-body measurements were made with ImpediMed bioimpedance analysis SFB7 BioImp v1.55 (Pinkenba Qld 4008, Australia) in 16 Taiwanese and Polish men and 16 Taiwanese and Polish women.Results. Mean vectors of Taiwanese men and women groups versus the Polish men and women groups were characterized by almost the same normalized resistance component with reactance component (separate 95% confidence limits, ) indicating that there were no differences of soft tissue hydration and mass.Interpretation and Conclusion. The evaluation of soft tissue hydration and mass through pattern analysis of vector plots as height, normalized resistance, and reactance measurements by bioelectric impedance vector analysis in Taiwanese and Polish college students did not differ between these two diverse ethnic groups. Further observational research investigating these properties in larger groups would be welcomed to elucidate and/or confirm these findings.

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35

Zandzadeh, Mohammad Jafar, Mohsen Saniei, and Reza Kianinezhad. "Space vector modulation with reduced common mode voltage for six-phase drives." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 2 (April 13, 2020): 395–411. http://dx.doi.org/10.1108/compel-09-2019-0347.

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Purpose This paper aims to present a modified space vector pulse width modulation (SVPWM) technique for six-phase induction motor drive based on common-mode voltage (CMV) and current losses which are two important issues affecting drive system behavior and quality. Design/methodology/approach It is shown that the presence of z-component currents and the presence of CMV in six-phase drive system are two major limiting factors in space vector selection. The behavior of several space vector selections in a two-level inverter considering minimum CMV and z-components is investigated. Then, the space vectors in a three-level inverter is analyzed and tried to explore an SVM technique with better behavior. Findings The analyses show that all the problems cannot be solved in a six-phase drive system with two-level inverter despite having 64 space vectors; this study tried to overcome the limitations by exploring space vectors in a three-level inverter. Originality/value The proposed pulse width modulation (PWM) strategy leads to minimum current distortion and undesired current components with zero CMV and modest torque ripple.

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36

Wu, Fang Zhen, Huan Huan Wang, Sha Yan Byrapa, Balaji Raghothamachar, Michael Dudley, Edward K. Sanchez, Darren M. Hansen, Roman Drachev, Stephan G. Mueller, and Mark J. Loboda. "Synchrotron X-Ray Topography Studies of the Propagation and Post-Growth Mutual Interaction of Threading Growth Dislocations with C-Component of Burgers Vector in PVT-Grown 4H-SiC." Materials Science Forum 717-720 (May 2012): 343–46. http://dx.doi.org/10.4028/www.scientific.net/msf.717-720.343.

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Synchrotron White Beam X-ray Topography (SWBXT) imaging of wafers cut parallel to the growth axis from 4H-SiC boules grown using Physical Vapor Transport has enabled visualization of the evolution of the defect microstructure. Here we present observations of the propagation and post-growth mutual interaction of threading growth dislocations with c-component of Burgers vector. Detailed contrast extinction studies reveal the presence of two types of such dislocations: pure c-axis screw dislocations and those with Burgers Vector n1c+n2a, where n1is equal to 1 and n2is equal to 1 or 2. In addition, observations of dislocation propagation show that some of the threading dislocations with c-component of Burgers adopt a curved, slightly helical morphology which can drive the dislocations from adjacent nucleation sites together enabling them to respond to the inter-dislocation forces and react. Since all of the dislocations exhibiting such helical configurations have significant screw component, and in view of the fact that such dislocations are typically not observed to glide, it is believed that such morphologies result in large part from the interaction of a non-equilibrium concentration of vacancies with the originally approximately straight dislocation cores during post-growth cooling. Such interactions can lead to complete or partial Burgers vector annihilation. Among the reactions observed are: (a) the reaction between opposite-sign threading screw dislocations with Burgers vectors c and –c wherein some segments annihilate leaving others in the form of trails of stranded loops comprising closed dislocation dipoles; (b) the reaction between threading dislocations with Burgers vectors of -c+a and c+a wherein the opposite c-components annihilate leaving behind the two a-components; (c) the similar reaction between threading dislocations with Burgers vectors of -c and c+a leaving behind the a-component.

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37

Froissart, Rémy, Yannis Michalakis, and Stéphane Blanc. "Helper Component-Transcomplementation in the Vector Transmission of Plant Viruse." Phytopathology® 92, no. 6 (June 2002): 576–79. http://dx.doi.org/10.1094/phyto.2002.92.6.576.

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Plant viruses are most frequently transmitted from one host plant to another by vectors. In noncirculative vector transmission, the virus does not process through a cycle within the vector body. Instead, upon acquisition by the vector, viruses are retained in the mouth parts or the anterior gut; from there, they will be subsequently released in a new host plant. Two molecular strategies have been described for the virus—vector interaction. In the capsid strategy, the virus coat interacts directly with binding sites in the vector mouth parts, whereas an additional nonstructural protein, designated helper component (HC), is required in the helper strategy. The HC and virus particles can be acquired sequentially, and this property introduces the possibility that an HC acquired first by the vector assists the transmission of virus particles located in the same cell, in other cells, or even in other host plants probed by the vector. Such a phenomenon is here called HC-transcomplementation. Surprisingly, the existing definition of HC does not explicitly include the concept of HC-transcomplementation, and it is generally omitted in the literature in any consideration of the virus biology other than the molecular interaction with the vector. Here we propose an extended definition of HC and emphasize the concept of HC-transcomplementation that distinguishes the helper strategy from any other type of vector transmission and may have consequences at the level of the virus population genetics and evolution.

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38

Mayor, Shane D., Jennifer P. Lowe, and Christopher F. Mauzey. "Two-Component Horizontal Aerosol Motion Vectors in the Atmospheric Surface Layer from a Cross-Correlation Algorithm Applied to Scanning Elastic Backscatter Lidar Data*." Journal of Atmospheric and Oceanic Technology 29, no. 11 (November 1, 2012): 1585–602. http://dx.doi.org/10.1175/jtech-d-11-00225.1.

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Abstract Two-component horizontal motion vectors of aerosol features were calculated by applying a cross-correlation algorithm to square image blocks extracted from consecutive pairs of elastic backscatter lidar scans. The resulting vector components were compared with corresponding horizontal wind components from tower-mounted sonic anemometers located at the center of the image blocks. In the analysis 180 245 pairs of vectors derived from 75 days of field data collected between 19 March and 11 June 2007 were used. Examples of time series comparisons from 4-h periods during light, strong, and changing wind conditions are presented. Mean signal-to-noise ratios (SNRs) of the block backscatter data, maxima of the cross-correlation functions (CCFs), observed wind speed, and turbulent kinetic energy (TKE) were also calculated for each velocity component comparison. The correlation between the lidar-derived motion components and sonic anemometer wind components tends to be highest during light wind conditions with low TKE. An empirical relationship is presented that enables the elimination of vectors that are likely to be significantly different than the anemometer measurement. When applied to the entire set of scans available, this quality control (QC) method increases the correlation between the two forms of measurements. Finally, the cross-correlation algorithm and QC method are applied to a mesh of locations over pairs of scans. Two examples of two-dimensional and two-component vector flow fields are shown. In one case, the flow field reveals a rotational circulation associated with a vortex and, in the other case, convergence and transport near the leading edge of a density current front.

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39

Agranovsky, Alexey. "Enhancing Capsid Proteins Capacity in Plant Virus-Vector Interactions and Virus Transmission." Cells 10, no. 1 (January 7, 2021): 90. http://dx.doi.org/10.3390/cells10010090.

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Vector transmission of plant viruses is basically of two types that depend on the virus helper component proteins or the capsid proteins. A number of plant viruses belonging to disparate groups have developed unusual capsid proteins providing for interactions with the vector. Thus, cauliflower mosaic virus, a plant pararetrovirus, employs a virion associated p3 protein, the major capsid protein, and a helper component for the semi-persistent transmission by aphids. Benyviruses encode a capsid protein readthrough domain (CP-RTD) located at one end of the rod-like helical particle, which serves for the virus transmission by soil fungal zoospores. Likewise, the CP-RTD, being a minor component of the luteovirus icosahedral virions, provides for persistent, circulative aphid transmission. Closteroviruses encode several CPs and virion-associated proteins that form the filamentous helical particles and mediate transmission by aphid, whitefly, or mealybug vectors. The variable strategies of transmission and evolutionary ‘inventions’ of the unusual capsid proteins of plant RNA viruses are discussed.

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40

Agranovsky, Alexey. "Enhancing Capsid Proteins Capacity in Plant Virus-Vector Interactions and Virus Transmission." Cells 10, no. 1 (January 7, 2021): 90. http://dx.doi.org/10.3390/cells10010090.

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Анотація:

Vector transmission of plant viruses is basically of two types that depend on the virus helper component proteins or the capsid proteins. A number of plant viruses belonging to disparate groups have developed unusual capsid proteins providing for interactions with the vector. Thus, cauliflower mosaic virus, a plant pararetrovirus, employs a virion associated p3 protein, the major capsid protein, and a helper component for the semi-persistent transmission by aphids. Benyviruses encode a capsid protein readthrough domain (CP-RTD) located at one end of the rod-like helical particle, which serves for the virus transmission by soil fungal zoospores. Likewise, the CP-RTD, being a minor component of the luteovirus icosahedral virions, provides for persistent, circulative aphid transmission. Closteroviruses encode several CPs and virion-associated proteins that form the filamentous helical particles and mediate transmission by aphid, whitefly, or mealybug vectors. The variable strategies of transmission and evolutionary ‘inventions’ of the unusual capsid proteins of plant RNA viruses are discussed.

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41

Zhang, Xiao-Fei, Pei Zhang, Wan-Quan He, and Xun-Xu Liu. "Stability properties of vector solitons in two-component Bose—Einstein condensates with tunable interactions." Chinese Physics B 20, no. 2 (February 2011): 020307. http://dx.doi.org/10.1088/1674-1056/20/2/020307.

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42

K Timotius, Ivanna, Iwan Setyawan, and Andreas A Febrianto. "Face Recognition between Two Person using Kernel Principal Component Analysis and Support Vector Machines." International Journal on Electrical Engineering and Informatics 2, no. 1 (March 30, 2010): 53–61. http://dx.doi.org/10.15676/ijeei.2010.2.1.5.

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43

Devyatisilny, A. S., and A. V. Shurygin. "Mathematical model of sequential information integration in a satellite-inertial system for determining the movement of a geodesic platform." Geodesy and Cartography 959, no. 5 (June 20, 2020): 35–40. http://dx.doi.org/10.22389/0016-7126-2020-959-5-35-40.

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The article is devoted to the matter of on-board integrating positional information delivered by the navigation satellite system (NSS) at a two-position reception and inertial information on the vector of apparent acceleration, measured by a three-component unit of newtonometers. The problem of determining the angular parameters (spatial orientation) of the geodesic platform (GP) movement, which is solved against the background of the trajectory linear kinematic parameters e stimation and the specific force vector causing the trajectory causality. The task of determining the spatial orientation of the SE is formulated; it is shown that to specify two vectors known in different coordinate trihedrons is enough for its solution, and considering the force vector and the relative position vector of two NSS receivers as such is proposed. A numerical study was performed and some of its results including elements of the trajectory of motion, forces and Euler – Krylov angles with derivatives estimates were presented verifying the initial model representations.

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Ou, Shikun, Yanqi Fan, and Qunfang Li. "Automorphism Group and Other Properties of Zero Component Graph over a Vector Space." Journal of Mathematics 2021 (April 10, 2021): 1–8. http://dx.doi.org/10.1155/2021/5595620.

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In this paper, we introduce an undirected simple graph, called the zero component graph on finite-dimensional vector spaces. It is shown that two finite-dimensional vector spaces are isomorphic if and only if their zero component graphs are isomorphic, and any automorphism of a zero component graph can be uniquely decomposed into the product of a permutation automorphism and a regular automorphism. Moreover, we find the dominating number, as well as the independent number, and characterize the minimum independent dominating sets, maximum independent sets, and planarity of the graph. In the case that base fields are finite, we calculate the fixing number and metric dimension of the zero component graphs and determine vector spaces whose zero component graphs are Hamiltonian.

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Адамашвили, Г. Т. "Двухкомпонентный векторный бризер". Письма в журнал технической физики 47, № 11 (2021): 14. http://dx.doi.org/10.21883/pjtf.2021.11.51000.18511.

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The two-component vector breather solution of the modified Benjamin–Bona–Mahony equation is considered. By means of the generalized perturbation reduction method, the equation is reduced to the coupled nonlinear Schrodinger equations for auxiliary functions. Explicit analytical expressions for the profile and parameters of the two-component vector breather, the components of which oscillating with the sum and difference of the frequencies and wave numbers are obtained.

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Li, Yan Ling, and Ye Hang Zhu. "A Component Query Method Based on Facet Description." Applied Mechanics and Materials 241-244 (December 2012): 2986–89. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.2986.

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The representation and retrieval technology of components are two core technology of the reusable component library. Related research think that the component query method based on facet description is much better than other methods, but when the user is not familiar with the term hierarchical tree of facet, they can not accurately represent the needs of their inquiry, so lead to lower query precision.To address this problem, this paper proposes a component query method based on facet description .In this method, the component will be expressed as vector form. Through the iterative process, using the user feedback information on the query results to adjust the user query vector constantly, and making it approximate the ideal query vector. Through the related experiments, this method is proven to improve the effectiveness of the component query precision.

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Sidorov, S. M. "Hidden Markov Model of Two-Component System with Group Instantly Replenished Time Reserve." INFORMACIONNYE TEHNOLOGII 27, no. 2 (February 12, 2021): 64–71. http://dx.doi.org/10.17587/it.27.64-71.

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Most systems allow the construction of a semi-Markov model. However, during the operation of the system, full information contained in the state encoding is not always available, but it is possible to obtain some signal (information). Tasks arise to assess the consistency of the model with the received data (signals), to refine the model and its parameters. Such parameters can be characteristics of random values characterizing system operation, time reserve value, etc. The theory of hidden Markov models allows solving these problems. In order to move from a semi-Markov model of the system to its hidden Markov model, it is proposed to first the semi-Markov model merge using a stationary phase merging algorithm. In this paper, on the basis of the semi-Markov model with a common phase state space of a two-component system with a group instantly replenished timereserve, we construct a hidden Markov model of a two-component system with a group instantly replenished time reserve. It is used to evaluate the characteristics and predict the states of the system in question based on the received vector of signals. The influence of the time reserve value on the probability of occurrence of the obtained vector of signals is shown.

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ZHANG, YAN, BIN YU, and HAI-MING GU. "FACE RECOGNITION USING CURVELET-BASED TWO-DIMENSIONAL PRINCIPLE COMPONENT ANALYSIS." International Journal of Pattern Recognition and Artificial Intelligence 26, no. 03 (May 2012): 1256009. http://dx.doi.org/10.1142/s0218001412560095.

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The task of face recognition has been actively researched in recent years because of its many applications in various domains. This paper presents a robust face recognition system using curvelet-based two-dimensional principle component analysis (2D PCA) to address the problem of human face recognition from still images. 2D PCA has advantages over PCA in evaluating the covariance matrix accurately and time complexity. Inspired by the attractive attributes of curvelets in catching the edge singularities with very few coefficients in a non-adaptive manner, we introduce the scheme of decomposing images into curvelet subbands and applying 2D PCA to create a representative feature set. Experiments were designed with different implementations of each module using standard testing database. We experimented with changing the illumination normalization procedure; comparing the baseline PCA-based method with the proposed scheme; studying effects on algorithm performance of k-nearest neighbor (kNN) classifier and Support Vector Machine (SVM) classifier in the classification process; also we experimented with different databases such as FERET, etc. High accuracy rate were achieved by the proposed scheme through a comparative study.

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Yu, Pengfei, and Jianhua Geng. "Analytic Acoustic–Elastic Coupled Equations and Their Application in Vector-Wave-Based Imaging of Ocean Bottom 4C Data." Pure and Applied Geophysics 177, no. 2 (September 23, 2019): 961–75. http://dx.doi.org/10.1007/s00024-019-02326-w.

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Abstract In conventional vector-wave-based elastic reverse-time migration, there are two types of artifacts: low-frequency artifacts and nonphysical artifacts. Vector-decomposition-based acoustic–elastic coupled equations are effective in suppressing nonphysical artifacts by using ocean bottom four component (4C) seismic data for receiver-side tensorial extrapolation. We introduce up/down-going wave separation into the vector-decomposition-based acoustic–elastic coupled equations, and deduce novel analytic acoustic–elastic coupled equations. With these novel equations, we can obtain the source-side and receiver-side up-going and down-going P/S-wave vectors in wavefield propagation, and effectively suppress both of the artifacts in vector-wave-based elastic reverse-time migration by combining receiver-side tensorial extrapolation and the decomposed vector-wave-based imaging conditions. Examples using synthetic data and field data are presented to illustrate the validity and effectiveness of our method.

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He, Jun-Rong, Hua-Mei Li, and Lu Li. "Localized nonlinear vector matter waves in two-component Bose–Einstein condensates with spatially modulated nonlinearities." Physics Letters A 376, no. 45 (October 2012): 3108–12. http://dx.doi.org/10.1016/j.physleta.2012.09.035.

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