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Articles de revues sur le sujet « Moving planes method »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 14 mars 2023

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1

Dancer, E. N. « Some notes on the method of moving planes ». Bulletin of the Australian Mathematical Society 46, no 3 (décembre 1992) : 425–34. http://dx.doi.org/10.1017/s0004972700012089.

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In this paper, we obtain a version of the sliding plane method of Gidas, Ni and Nirenberg which applies to domains with no smoothness condition on the boundary. The method obtains results on the symmetry of positive solutions of boundary value problems for nonlinear elliptic equations. We also show how our techniques apply to some problems on half spaces.
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2

Li, Yan Yan. « Harnack Type Inequality : the Method of Moving Planes ». Communications in Mathematical Physics 200, no 2 (1 février 1999) : 421–44. http://dx.doi.org/10.1007/s002200050536.

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3

Berestycki, H., et L. Nirenberg. « On the method of moving planes and the sliding method ». Boletim da Sociedade Brasileira de Matem�tica 22, no 1 (mars 1991) : 1–37. http://dx.doi.org/10.1007/bf01244896.

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Chen, Wenxiong, Pengyan Wang, Yahui Niu et Yunyun Hu. « Asymptotic method of moving planes for fractional parabolic equations ». Advances in Mathematics 377 (janvier 2021) : 107463. http://dx.doi.org/10.1016/j.aim.2020.107463.

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5

Zhang, Lihong, et Xiaofeng Nie. « A direct method of moving planes for the Logarithmic Laplacian ». Applied Mathematics Letters 118 (août 2021) : 107141. http://dx.doi.org/10.1016/j.aml.2021.107141.

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Chen, Wenxiong, Congming Li et Yan Li. « A direct method of moving planes for the fractional Laplacian ». Advances in Mathematics 308 (février 2017) : 404–37. http://dx.doi.org/10.1016/j.aim.2016.11.038.

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7

Lin, Chang-Shou, et Juncheng Wei. « Uniqueness of Multiple-spike Solutions via the Method of Moving Planes ». Pure and Applied Mathematics Quarterly 3, no 3 (2007) : 689–735. http://dx.doi.org/10.4310/pamq.2007.v3.n3.a3.

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8

Guan, Pengfei, Chang-Shou Lin et Guofang Wang. « Application of the method of moving planes to conformally invariant equations ». Mathematische Zeitschrift 247, no 1 (1 mai 2004) : 1–19. http://dx.doi.org/10.1007/s00209-003-0608-x.

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9

Дудукало, Д., D. Dudukalo, М. Чепчуров, M. Chepchurov, М. Вагнер et M. Vagner. « METHOD FOR PRODUCING PLANES PARALLEL TO THE AXIS ROTATION AXIS ON LATHES ». Bulletin of Belgorod State Technological University named after. V. G. Shukhov 4, no 10 (7 novembre 2019) : 142–48. http://dx.doi.org/10.34031/article_5db43fa622b135.74427811.

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This article describes the method of obtaining surfaces by moving cutting tool edge in the transversal direction on automatic lathes. The application of this handling method allows person to take a fresh look at the usage and modernization for state of the art equipment and improve its technological capabilities, which allows increasing capacity and extending the range of products. In this article tool movements are calculated for revolution of the workpiece, a model for moving the tool path is produced and with the help of using software package a tool movement graph is constructed when a plane is formed parallel to the product axis. It is established that the obtained model of tool movement allows a person to analyze velocity variation in speed from zero to maximum value, since the method’s implementation of moving the tool in the opposite direction it require to solve the tool’s reverse problem. The method allows a person to analyze movements and trajectories for ensuring the implementation of obtaining planes and various complex products on automatic lathes.
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10

Wang, Pengyan, et Pengcheng Niu. « A direct method of moving planes for a fully nonlinear nonlocal system ». Communications on Pure & ; Applied Analysis 16, no 5 (2017) : 1707–18. http://dx.doi.org/10.3934/cpaa.2017082.

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11

Ying, Wang. « The Method of Moving Planes for Integral Equation in an Extremal Case ». Journal of Partial Differential Equations 29, no 3 (juin 2016) : 246–54. http://dx.doi.org/10.4208/jpde.v29.n3.6.

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12

Liu, Baiyu. « Direct method of moving planes for logarithmic Laplacian system in bounded domains ». Discrete & ; Continuous Dynamical Systems - A 38, no 10 (2018) : 5339–49. http://dx.doi.org/10.3934/dcds.2018235.

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13

Shi, Wei. « Liouville-Type Theorem for Nonlinear Elliptic Equations Involving Generalized Greiner Operator ». Mathematics 11, no 1 (24 décembre 2022) : 61. http://dx.doi.org/10.3390/math11010061.

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14

Ciraolo, Giulio, et Luigi Vezzoni. « A sharp quantitative version of Alexandrov's theorem via the method of moving planes ». Journal of the European Mathematical Society 20, no 2 (31 janvier 2018) : 261–99. http://dx.doi.org/10.4171/jems/766.

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15

Fang, Zhongbo, et Anna Wang. « Some Symmetry Results for the A-Laplacian Equation via the Moving Planes Method ». Advances in Pure Mathematics 02, no 06 (2012) : 363–66. http://dx.doi.org/10.4236/apm.2012.26053.

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16

Pucci, C., et Colesanti Andrea. « A symmetry result for the p-laplacian equation via the moving planes method ». Applicable Analysis 55, no 3-4 (décembre 1994) : 207–13. http://dx.doi.org/10.1080/00036819408840300.

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17

Cheng, Chunxia, Zhongxue Lü et Yingshu Lü. « A direct method of moving planes for the system of the fractional Laplacian ». Pacific Journal of Mathematics 290, no 2 (25 juillet 2017) : 301–20. http://dx.doi.org/10.2140/pjm.2017.290.301.

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18

Chen, Chiun-Chuan, et Chang-Shou Lin. « Estimates of the conformal scalar curvature equation via the method of moving planes ». Communications on Pure and Applied Mathematics 50, no 10 (octobre 1997) : 971–1017. http://dx.doi.org/10.1002/(sici)1097-0312(199710)50:10<971 ::aid-cpa2>3.0.co;2-d.

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19

Lin, Chang-Shou. « Estimates of the scalar curvature equation via the method of moving planes III ». Communications on Pure and Applied Mathematics 53, no 5 (mai 2000) : 611–46. http://dx.doi.org/10.1002/(sici)1097-0312(200005)53:5<611 ::aid-cpa4>3.0.co;2-n.

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20

Liu, Chi-Min. « Extended Stokes' Problems for Relatively Moving Porous Half-Planes ». Mathematical Problems in Engineering 2009 (2009) : 1–10. http://dx.doi.org/10.1155/2009/185965.

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A shear flow motivated by relatively moving half-planes is theoretically studied in this paper. Either the mass influx or the mass efflux is allowed on the boundary. This flow is called the extended Stokes' problems. Traditionally, exact solutions to the Stokes' problems can be readily obtained by directly applying the integral transforms to the momentum equation and the associated boundary and initial conditions. However, it fails to solve the extended Stokes' problems by using the integral-transform method only. The reason for this difficulty is that the inverse transform cannot be reduced to a simpler form. To this end, several crucial mathematical techniques have to be involved together with the integral transforms to acquire the exact solutions. Moreover, new dimensionless parameters are defined to describe the flow phenomena more clearly. On the basis of the exact solutions derived in this paper, it is found that the mass influx on the boundary hastens the development of the flow, and the mass efflux retards the energy transferred from the plate to the far-field fluid.
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21

Ma, Shih-Hsin, Jun-Yi Wu et Chun-Ming Chiang. « Drawing the Light Paths at a Lens to Find Its Effective Focal Length and Principal Planes ». Physics Teacher 60, no 7 (octobre 2022) : 591–93. http://dx.doi.org/10.1119/5.0020125.

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This paper proposes a simple method to design experiments for drawing the light paths at a lens to find its effective focal length and principal planes. In the designed experiments, long-exposure photography was used to record the light scattered using a moving sheet of paper, thus revealing the light path. According to the proposed experimental method, (1) the effective focal length of a lens and (2) the principal planes of a lens can be measured. Moreover, the system is easy to build, inexpensive, and can promote students’ understanding of geometric optics by providing an intuitive physical phenomenon. The work is also of pedagogic interest as it reveals a new simple experimental method to find the principal planes of a thick lens and its effective focal length.
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22

Bendjilali, K., et F. Belkhouche. « Collision course by transformation of coordinates and plane decomposition ». Robotica 27, no 4 (juillet 2009) : 499–509. http://dx.doi.org/10.1017/s0263574708004888.

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SUMMARYThis paper deals with the problem of collision course checking in a dynamic environment for mobile robotics applications. Our method is based on the relative kinematic equations between moving objects. These kinematic equations are written under polar form. A transformation of coordinates is derived. Under this transformation, collision between two moving objects is reduced to collision between a stationary object and a virtual moving object. In addition to the direct collision course, we define the indirect collision course, which is more critical and difficult to detect. Under this formulation, the collision course problem is simplified, and complex scenarios are reduced to simple scenarios. In three-dimensional (3D) settings, the working space is decomposed into two planes: the horizontal plane and the vertical plane. The collision course detection in 3D is studied in the vertical and horizontal planes using 2D techniques. This formulation brings important simplifications to the collision course detection problem even in the most critical and difficult scenarios. An extensive simulation is used to illustrate the method in 2D and 3D working spaces.
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23

Deng, Yan, Junfang Zhao et Baozeng Chu. « Symmetry of positive solutions for systems of fractional Hartree equations ». Discrete & ; Continuous Dynamical Systems - S 14, no 9 (2021) : 3085. http://dx.doi.org/10.3934/dcdss.2021079.

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<p style='text-indent:20px;'>In this paper, we deal with a system of fractional Hartree equations. By means of a direct method of moving planes, the radial symmetry and monotonicity of positive solutions are presented.</p>
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24

Mikyoung Hur, Vera. « Symmetry of steady periodic water waves with vorticity ». Philosophical Transactions of the Royal Society A : Mathematical, Physical and Engineering Sciences 365, no 1858 (13 mars 2007) : 2203–14. http://dx.doi.org/10.1098/rsta.2007.2002.

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The symmetry and monotonicity properties of steady periodic gravity water waves are established for arbitrary vorticities if the wave profile is monotone near the trough and every streamline attains a minimum below the trough. The proof uses the method of moving planes.
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25

Dou, Meixia. « A direct method of moving planes for fractional Laplacian equations in the unit ball ». Communications on Pure and Applied Analysis 15, no 5 (juillet 2016) : 1797–807. http://dx.doi.org/10.3934/cpaa.2016015.

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26

Chen, Chiun-Chuan, et Chang-Shou Lin. « Estimate of the conformal scalar curvature equation via the method of moving planes. II ». Journal of Differential Geometry 49, no 1 (1998) : 115–78. http://dx.doi.org/10.4310/jdg/1214460938.

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27

Chen, Chiun-Chuan, et Ming Di Lee. « On the method of moving planes and symmetry of solutions of semilinear elliptic equations ». Nonlinear Analysis : Theory, Methods & ; Applications 28, no 10 (mai 1997) : 1697–707. http://dx.doi.org/10.1016/0362-546x(95)00240-v.

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28

Wang, Xin-jing, et Peng-cheng Niu. « A Direct Method of Moving Planes to Fractional Power SubLaplace Equations on the Heisenberg Group ». Acta Mathematicae Applicatae Sinica, English Series 37, no 2 (avril 2021) : 364–79. http://dx.doi.org/10.1007/s10255-021-1016-x.

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29

Salehi, Nahid, et Mankyu Sung. « Realistic Multi-Agent Formation Using Discretionary Group Behavior (DGB) ». Applied Sciences 10, no 10 (19 mai 2020) : 3518. http://dx.doi.org/10.3390/app10103518.

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Simulating groups and their behaviors have been one of the important topics recently. This paper proposes a novel velocity-based method to simulate the realistic behavior of groups moving in a specific formation in a virtual environment including other groups and obstacles. The proposed algorithm, we called “DGB—Discretionary Group Behavior”, takes advantage of ORCA (Optimal Reciprocal Collision Avoidance) half-planes for both grouping and collision avoidance strategy. By considering new half-planes for each agent, we can have more reasonable and intelligent behavior in front of challenging obstacles and other agents. Unlike recent similar works, independent members in a group do not have predefined connections to each other even though they can keep the group’s formation while moving and trying to follow their best neighbors discretionarily in critical situations. Through experiments, we found that the proposed algorithm can yield more human-like group behavior in a crowd of agents.
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30

Parrot, J. F., et C. Ramírez-Núñez. « POSITIVE AND NEGATIVE ROUGHNESS ACCORDING TO LOCAL DIFFERENCES BETWEEN DEM SURFACE AND 3D REFERENCE PLANES ». ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2021 (17 juin 2021) : 159–65. http://dx.doi.org/10.5194/isprs-annals-v-3-2021-159-2021.

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Abstract. The irregularities of the earth’s surface are quantified by means of roughness measurements using Digital Elevation Models (DEM’s). This article presents a roughness measurement method that is based on the calculation of the difference of altitude existing between a plane passing through the centre of a moving window and the altitude of the DEM surface inside this window. This method differs from the measure of the standard deviation and best fit plane, in the sense that it considers all difference values, positives or negatives. The measurement is done in a 3 × 3 or a 5 × 5 moving window and contemplates inside this window the plane which passes through the centre of the window and the highest pixel located in the border or perimeter of this window. According to the 3D configuration of the DEM surface inside the moving window, the sum of all the differences is positive or negative, allowing to discriminate the local morphology independently of the global roughness. The roughness variable which distinguishes negative and positive values allows to classify accurately landscape units such as watersheds, riverbeds, volcanic assemblages as well as landforms associated with tectonic structures.
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31

Zhang, Tao. « Liouville Type Theorems Involving the Fractional Laplacian on the Upper Half Euclidean Space ». Fractal and Fractional 6, no 12 (13 décembre 2022) : 738. http://dx.doi.org/10.3390/fractalfract6120738.

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In this paper, we mainly establish Liouville-type theorems for the elliptic semi-linear equations involving the fractional Laplacian on the upper half of Euclidean space. We employ a direct approach by studying an equivalent integral equation instead of using the conventional extension method. Applying the method of moving planes in integral forms, we prove the non-existence of positive solutions under very weak conditions. We also extend the results to a more general equation.
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Sun, Tao, et Hua Su. « Monotonicity and Symmetry of Solutions to Fractional Laplacian in Strips ». Journal of Function Spaces 2021 (10 novembre 2021) : 1–5. http://dx.doi.org/10.1155/2021/5354775.

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In this paper, using the method of moving planes, we study the monotonicity in some directions and symmetry of the Dirichlet problem involving the fractional Laplacian − Δ α / 2 u x = f u x , x ∈ Ω , u x > 0 , x ∈ Ω , u x = 0 , x ∈ ℝ n \ Ω , in a slab-like domain Ω = ℝ n − 1 × 0 , h ⊂ ℝ n .
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33

Dai, Wei, Yanqin Fang et Guolin Qin. « Classification of positive solutions to fractional order Hartree equations via a direct method of moving planes ». Journal of Differential Equations 265, no 5 (septembre 2018) : 2044–63. http://dx.doi.org/10.1016/j.jde.2018.04.026.

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34

Yang, Jonghyun, Jeongjun Park et Changwan Yu. « Accuracy Verification of 3D Motion Analysis System Using Smart-phone Monocular Camera ». Korean Journal of Sport Science 32, no 4 (31 décembre 2021) : 464–71. http://dx.doi.org/10.24985/kjss.2021.32.4.464.

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PURPOSE This study aimed to verify the accuracy of three-dimensional (3D) motion data produced through artificial intelligence-based user motion recognition technology with images obtained using a smartphone monocular camera. This was done to explore the possibility of developing an application that can improve the reliability of the measurement of physical activity performing motions and feedback provision.METHODS To check the accuracy of the artificial intelligence-based 3D motion analysis system that utilized a semi-supervised learning method, a commercialized 3D infrared motion analysis system measured and compared motions on three movement planes, motions with limited joint movement, and fast motions in a wide moving range.RESULTS The motions on the coronal and sagittal planes produced through the 3D motion analysis application showed very high measurement accuracy; however, the accuracy of the measurement of motions on the horizontal plane, which could not be measured directly with a camera, was relatively lower than that of the coronal and sagittal planes. Accuracy in measuring 3D motion was moderate in moving motions and low in motions with limited joint movement.CONCLUSIONS For the developed 3D motion analysis system to be used in online physical education, the types of physical activities included in the program should be comprehensively composed through the analysis of the content system of the physical education curriculum and the resultant physical activities.
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Hou, Wenwen, Lihong Zhang, Ravi P. Agarwal et Guotao Wang. « Radial symmetry for a generalized nonlinear fractional p-Laplacian problem ». Nonlinear Analysis : Modelling and Control 26, no 2 (1 mars 2021) : 349–62. http://dx.doi.org/10.15388/namc.2021.26.22358.

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This paper first introduces a generalized fractional p-Laplacian operator (–Δ)sF;p. By using the direct method of moving planes, with the help of two lemmas, namely decay at infinity and narrow region principle involving the generalized fractional p-Laplacian, we study the monotonicity and radial symmetry of positive solutions of a generalized fractional p-Laplacian equation with negative power. In addition, a similar conclusion is also given for a generalized Hénon-type nonlinear fractional p-Laplacian equation.
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Akmatov, A. « The Regularization Method of Solutions a Bisingularly Perturbed Problem in the Generalized Functions Space ». Bulletin of Science and Practice 8, no 2 (15 février 2022) : 10–17. http://dx.doi.org/10.33619/2414-2948/75/01.

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When singularly perturbed problems are investigated, in the case of a change in stability, all work was performed in the space of analytical functions. Naturally, questions will arise whether it is possible to obtain an estimate of solutions to a singularly perturbed problem without moving to the complex plane. In the work, the first results obtained are the solutions of the singularly motivated task, not moving into the complex plane. For this purpose, a method of regularization in the space of generalized functions has been developed and corresponding estimates have been obtained. If we choose the starting point in a stable interval, then up to the transition point, the asymptotic proximity of solutions to the perturbed and undisturbed problem is in the order of a small parameter ε. The problem will appear when the point belongs to an unstable interval. Therefore, prior to this, the works moved to the complex plane. In such problems, there is a concept of the delay time of solutions to the perturbed and undisturbed problem. Level lines will appear in complex planes. In such problems, there is a concept of the delay time of solutions to the perturbed and undisturbed problem. Level lines will appear in complex planes. At special points, these lines have critical level lines. Therefore, it is impossible to choose the starting point so as to get the maximum delay time. But the asymptotic proximity of solutions of perturbed and undisturbed problems is possible with limited time delays. If we study the solution in the space of generalized functions, then we can choose the starting point with the maximum time delay. And also, without passing to the complex plane, it is possible to establish the asymptotic proximity of solutions to the perturbed and undisturbed problem. For this purpose, a method of regularization of solutions of a singularly perturbed problem has been developed for the first time.
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Tang, Sufang, et Jingbo Dou. « Nonexistence results for a fractional Hénon–Lane–Emden equation on a half-space ». International Journal of Mathematics 26, no 13 (décembre 2015) : 1550110. http://dx.doi.org/10.1142/s0129167x15501104.

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Consider the following Dirichlet problem involving the fractional Hénon–Lane–Emden Laplacian: [Formula: see text] where [Formula: see text] and [Formula: see text] is the upper half-Euclidean space. We first show that the above equation is equivalent to the following integral equation: [Formula: see text] where [Formula: see text] is the Green function in [Formula: see text] with the same Dirichlet condition. Then we prove the nonexistence of positive solutions by using the method of moving planes in integral forms.
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Hou, Wenwen, et Lihong Zhang. « Radial symmetry of a relativistic Schrödinger tempered fractional p-Laplacian model with logarithmic nonlinearity ». Nonlinear Analysis : Modelling and Control 28 (23 décembre 2022) : 1–14. http://dx.doi.org/10.15388/namc.2023.28.29621.

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In this paper, by introducing a relativistic Schrödinger tempered fractional p-Laplacian operator (–Δ)p,λs,m, based on the relativistic Schrödinger operator (–Δ + m2)s and the tempered fractional Laplacian (Δ + λ)β/2, we consider a relativistic Schrödinger tempered fractional p-Laplacian model involving logarithmic nonlinearity. We first establish maximum principle and boundary estimate, which play a very crucial role in the later process. Then we obtain radial symmetry and monotonicity results by using the direct method of moving planes.
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39

Zhang, Tao, et Tingzhi Cheng. « A priori estimates of solutions to nonlinear fractional Laplacian equation ». Electronic Research Archive 31, no 2 (2022) : 1119–33. http://dx.doi.org/10.3934/era.2023056.

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<abstract><p>In this paper, we focus on the research of a priori estimates of several types of semi-linear fractional Laplacian equations with a critical Sobolev exponent. Employing the method of moving planes, we can achieve a priori estimates which are closely connected to the existence of solutions to nonlinear fractional Laplacian equations. Our result can extend a priori estimates of the second order elliptic equation to the fractional Laplacian equation and we believe that the method used here will be applicable to more general nonlocal problems.</p></abstract>
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40

FELMER, PATRICIO, et YING WANG. « RADIAL SYMMETRY OF POSITIVE SOLUTIONS TO EQUATIONS INVOLVING THE FRACTIONAL LAPLACIAN ». Communications in Contemporary Mathematics 16, no 01 (21 janvier 2014) : 1350023. http://dx.doi.org/10.1142/s0219199713500235.

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The aim of this paper is to study radial symmetry and monotonicity properties for positive solution of elliptic equations involving the fractional Laplacian. We first consider the semi-linear Dirichlet problem [Formula: see text] where (-Δ)αdenotes the fractional Laplacian, α ∈ (0, 1), and B1denotes the open unit ball centered at the origin in ℝNwith N ≥ 2. The function f : [0, ∞) → ℝ is assumed to be locally Lipschitz continuous and g : B1→ ℝ is radially symmetric and decreasing in |x|. In the second place we consider radial symmetry of positive solutions for the equation [Formula: see text] with u decaying at infinity and f satisfying some extra hypothesis, but possibly being non-increasing.Our third goal is to consider radial symmetry of positive solutions for system of the form [Formula: see text] where α1, α2∈(0, 1), the functions f1and f2are locally Lipschitz continuous and increasing in [0, ∞), and the functions g1and g2are radially symmetric and decreasing. We prove our results through the method of moving planes, using the recently proved ABP estimates for the fractional Laplacian. We use a truncation technique to overcome the difficulty introduced by the non-local character of the differential operator in the application of the moving planes.
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41

Shiller, Zvi, et William Serate. « Trajectory Planning of Tracked Vehicles ». Journal of Dynamic Systems, Measurement, and Control 117, no 4 (1 décembre 1995) : 619–24. http://dx.doi.org/10.1115/1.2801122.

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This paper presents a method for computing the track forces and track speeds of planar tracked vehicles, required to follow a given path at specified speeds on horizontal and inclined planes. It is shown that the motions of a planar tracked vehicle are constrained by a velocity dependent nonholonomic constraint, derived from the force equation perpendicular to the tracks. This reduces the trajectory planning problem to determining the slip angle between the vehicle and the path tangent that satisfies the nonholonomic constraint along the entire path. Once the slip angle has been determined, the track forces are computed from the remaining equations of motion. Computing the slip angle is shown to be an initial boundary-value problem, formulated as a parameter optimization. This computational scheme is demonstrated numerically for a planar vehicle moving along circular paths on horizontal and inclined planes.
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42

Wu, Leyun, Mei Yu et Binlin Zhang. « Monotonicity results for the fractional p-Laplacian in unbounded domains ». Bulletin of Mathematical Sciences 11, no 02 (24 février 2021) : 2150003. http://dx.doi.org/10.1142/s166436072150003x.

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In this paper, we develop a direct method of moving planes in unbounded domains for the fractional p-Laplacians, and illustrate how this new method to work for the fractional p-Laplacians. We first proved a monotonicity result for nonlinear equations involving the fractional p-Laplacian in [Formula: see text] without any decay conditions at infinity. Second, we prove De Giorgi conjecture corresponding to the fractional p-Laplacian under some conditions. During these processes, we introduce some new ideas: (i) estimating the singular integrals defining the fractional p-Laplacian along a sequence of approximate maxima; (ii) estimating the lower bound of the solutions by constructing sub-solutions.
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43

Le, Phuong, et Hoang-Hung Vo. « Monotonicity and symmetry of positive solutions to degenerate quasilinear elliptic systems in half-spaces and strips ». Communications on Pure & ; Applied Analysis 21, no 3 (2022) : 1027. http://dx.doi.org/10.3934/cpaa.2022008.

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<p style='text-indent:20px;'>By means of the method of moving planes, we study the monotonicity of positive solutions to degenerate quasilinear elliptic systems in half-spaces. We also prove the symmetry of positive solutions to the systems in strips by using similar arguments. Our work extends the main results obtained in [<xref ref-type="bibr" rid="b16">16</xref>,<xref ref-type="bibr" rid="b20">20</xref>] to the system, in which substantial differences with the single cases are presented.</p>
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44

Kang, Hyeonbae, et Shigeru Sakaguchi. « A symmetry theorem in two-phase heat conductors ». Mathematics in Engineering 5, no 3 (2022) : 1–7. http://dx.doi.org/10.3934/mine.2023061.

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<abstract><p>We consider the Cauchy problem for the heat diffusion equation in the whole Euclidean space consisting of two media with different constant conductivities, where initially one medium has temperature 0 and the other has temperature 1. Under the assumptions that one medium is bounded and the interface is of class $ C^{2, \alpha} $, we show that if the interface is stationary isothermic, then it must be a sphere. The method of moving planes due to Serrin is directly utilized to prove the result.</p></abstract>
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45

Fan, Wenzheng, Wenzhong Shi, Haodong Xiang et Ke Ding. « A Novel Method for Plane Extraction from Low-Resolution Inhomogeneous Point Clouds and its Application to a Customized Low-Cost Mobile Mapping System ». Remote Sensing 11, no 23 (26 novembre 2019) : 2789. http://dx.doi.org/10.3390/rs11232789.

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Over the last decade, increasing demands for building interior mapping have brought the challenge of effectively and efficiently acquiring geometric information. Most mobile mapping methods rely on the integration of Simultaneous Localization And Mapping (SLAM) and costly Inertial Measurement Units (IMUs). Meanwhile, the methods also suffer misalignment errors caused by the low-resolution inhomogeneous point clouds captured using multi-line Mobile Laser Scanners (MLSs). While point-based alignments between such point clouds are affected by the highly dynamic moving patterns of the platform, plane-based methods are limited by the poor quality of the planes extracted, which reduce the methods’ robustness, reliability, and applicability. To alleviate these issues, we proposed and developed a method for plane extraction from low-resolution inhomogeneous point clouds. Based on the definition of virtual scanlines and the Enhanced Line Simplification (ELS) algorithm, the method extracts feature points, generates line segments, forms patches, and merges multi-direction fractions to form planes. The proposed method reduces the over-segmentation fractions caused by measurement noise and scanline curvature. A dedicated plane-to-plane point cloud alignment workflow based on the proposed plane extraction method was created to demonstrate the method’s application. The implementation of the coarse-to-fine procedure and the shortest-path initialization strategy eliminates the necessity of IMUs in mobile mapping. A mobile mapping prototype was designed to test the performance of the proposed methods. The results show that the proposed workflow and hardware system achieves centimeter-level accuracy, which suggests that it can be applied to mobile mapping and sensor fusion.
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46

Belova, Е., et O. Belova. « About an analogue of Neifeld’s connection on the space of centred planes with one-index basic-fibre forms ». Differential Geometry of Manifolds of Figures, no 50 (2019) : 41–47. http://dx.doi.org/10.5922/0321-4796-2019-50-6.

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This research is realized by Cartan — Laptev method (with prolongations and scopes, moving frame and exterior forms). In this paper we consider a space П of centered m-planes (a space of all centered planes of the dimension m). This space is considered in the projective space n P . For the space П we have: dim П=n + (n – m)m. Principal fiber bundle is arised above it. The Lie group is a typical fiber of the principal fiber. This group acts in the tangent space to the П. Analogue of Neifeld’s connection with multivariate glueing is given in this fibering by Laptev — Lumiste way. The case when one-index forms are basic-fibre forms is considered. We realize an analogue of the Norden strong normalization of the space П by fields of the geometrical images: (n – m – 1)-plane which is not having the common points with a centered m-plane and (m – 1)-plane which is belonging to the m-plane and not passing through its centre. It is proved that the analog of the Norden strong normalization of the space of centered planes induces this connection.
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47

Gabriele, Bianchi. « Non—existence of positive solutions to semilinear elliptic equations on r” or r” through the method of moving planes ». Communications in Partial Differential Equations 22, no 9-10 (janvier 1997) : 1671–90. http://dx.doi.org/10.1080/03605309708821315.

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48

Lin, Chang-Shou, et Juncheng Wei. « Locating the peaks of solutions via the maximum principle II : A local version of the method of moving planes ». Communications on Pure and Applied Mathematics 56, no 6 (21 mars 2003) : 784–809. http://dx.doi.org/10.1002/cpa.10073.

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49

Du, Guo Jun, Xiao Man Liu, Yu Da Hu et Chao Yu. « Nonlinear Superharmonic Resonance of Damped Circular Sandwich Plates with Initial Deflection ». Advanced Materials Research 199-200 (février 2011) : 1080–83. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1080.

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The nonlinear superharmonic resonance phenomenon of damped circular sandwich plates under uniform load is investigated. From the movement equation of circular sandwich plate showed in displacement components, got the relevant nonlinear vibration equation by Galerkin method. Under the clamped BC. Using multi-scale method, the periodical solutions were obtained which was of nonlinear the third-order superharmonic resonance. The FRF equation of the superharmonic resonance is obtained, and the necessary and sufficient condition on stability of the vibration are obtained synchronously.The infection to the amplitude while the correlative physical and geometric parameters changing were discussed, Drew the trajectories in moving phase planes during the stabilization process, and the stabilities and singularities of the solutions are analyzed.
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50

Du, Guo Jun, Xiao Man Liu et Yu Da Hu. « Research of Nonlinear Primary Resonance of Damped Circular Sandwich Plates with Initial Deflection ». Advanced Materials Research 199-200 (février 2011) : 1084–87. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.1084.

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The nonlinear forced vibration of damped circular sandwich plates is studied. From the movement equations of circular sandwich plate expressed in displacement components, got the relevant nonlinear vibration equation by Galerkin method. The standard Duffing equation with square and cubic minor items was obtained by dimensionless processed. The quadratic analytical solution of the principal resonance was deduced by multi-scale method. The FRF of primary resonance periodical solutions were obtained, synchronously the necessary and sufficient condition on stability of the vibration are obtained. The infection to the amplitude when the correlative physical and geometric parameters changing was discussed. The trajectories in moving phase planes during the stabilization process, the stabilities and singularities of the solutions are analyzed.
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