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Journal articles on the topic 'Contrôle de rigidité'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Noé, F., and T. Paillard. "Influence de la rigidité des chaussures de ski alpin sur le contrôle de l’équilibre dynamique." Neurophysiologie Clinique/Clinical Neurophysiology 44, no. 5 (November 2014): 511. http://dx.doi.org/10.1016/j.neucli.2014.09.056.

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2

Hudon, Christine, and Louise Bienvenue. "Des collégiens et leurs maîtres au tournant du XXe siècle." Globe 8, no. 2 (February 23, 2011): 41–71. http://dx.doi.org/10.7202/1000909ar.

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Par une approche inspirée de la micro-histoire, cette étude vise à analyser dans toute sa complexité la relation maître-élève dans un collège masculin du tournant du XXe siècle. L’analyse des lettres et des journaux intimes qu’ont laissés enseignants et enseignés met en lumière l’importance des dispositifs de contrôle de la jeunesse. Au collège, l’action éducative se déploie selon une conception hiérarchisée de l’école et de la société et s’appuie sur un rapport de pouvoir qui autorise l’usage d’une certaine violence. En dépit de la rigidité des règlements, le quotidien des collèges ménage une place aux liens affectifs entre maîtres et élèves. Les effets de telles amitiés sont cependant contradictoires : elles brisent la monotonie de l’univers collégien et lui donnent un peu de chaleur, mais elles engendrent aussi une pression accrue sur l’élève pour qu’il adhère aux valeurs du clergé enseignant et qu’il réponde à l’objectif de l’Église d’assurer le recrutement sacerdotal.

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3

Béland, François. "L'Anti-Congrès." Articles 13, no. 3 (April 12, 2005): 381–97. http://dx.doi.org/10.7202/055589ar.

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Souvenons-nous des étudiants de 1968. Dès janvier, ils ébranlent les fondements des organisations syndicales qui les représentent et des administrations scolaires ou universitaires qui gèrent leurs artivités académiques. Les nouvelles revendications s'expriment hors des cadres traditionnels : l'A.G.E.U.M. est exclue de la grève des étudiants de la Faculté des sciences sociales de l'Université de Montréal. Les revendications des « nouveaux » étudiants sont inconnues des « anciens » militants syndicaux : méthodes pédagogiques libertaires, refus de toute hiérarchie universitaire ou scolaire et responsabilité de l'étudiant envers le savoir qu'on lui enseigne. Pendant l'été, les associations étudiantes collégiales et universitaires engagent des animateurs syndicaux étudiants. L'U.G.E.Q. abandonne le rôle d'encadrement idéologique et organisationnel que lui avaient légué ses fondateurs. Elle refuse toute mission représentative, elle s'en remet au « milieu » étudiant, lieu de spontanéité et de créativité culturelle et politique, tandis que les plus militants de ses membres font un « tour du Québec », rencontrent les permanents syndicaux étudiants et les leaders locaux des institutions d'enseignement. Un cahier de revendications et un nouveau mode d'action revendicative émergent lors d'une session d'étude organisée par l'U.G.E.Q. : la semaine syndicale d'août. Militants, animateurs, leaders locaux sont présents à cette véritable préfiguration d'octobre, réunion d'un combat nouveau, comme le congrès de février 1969 allait en marquer la fin apocalyptique. Éclatent les événements d'octobre (1968). Logique, l'U.G.E.Q. informe, prête assistance technique, mais ne dirige pas. Les centres d'action sont les unités locales, plus ou moins militantes, qui se transforment en communautés libertaires révolutionnaires. L'unité du mouvement est donnée par quelques revendications, par l'intention libertaire commune et par les expressions idéologiques raffinées de leaders locaux dont l'audience s'élargit grâce aux média d'information. Après les événements d'octobre, les directions des cégeps prennent les mesures disciplinaires que l'on sait : exclusion de leaders, interdiction d'assemblées, renvoi d'étudiants, suspension de professeurs, saisies de journaux étudiants, contrôle des présences étrangères sur les campus, etc. L'U.G.E.Q. se révèle impuissante à organiser la résistance des étudiants et à empêcher l'application de ces mesures. En fait, ce n'est déjà plus son rôle : coordonner, informer n'est pas organiser. Donc, contestée de l'intérieur, incapable de réagir aux actions les plus vexatoires des administrations scolaires, asphyxiée par une grave crise financière, l'U.G.E.Q. disparaît en juin 1969 de l'horizon politique et syndical du Québec à la suite d'un congrès en parfaite continuité historique avec les événements qui l'avaient précédé depuis presque un an et demi. Il nous semble en effet que le congrès de février 1969 doit se comprendre comme la dernière manifestation d'un cycle commencé en janvier 1968. Le syndicalisme étudiant que le Québec avait connu pendant la révolution tranquille, disparaît avec la conjoncture politique qui avait favorisé ce mode d'organisation. Des revendications nouvelles, des actions nouvelles, le fractionnement des organisations syndicales en groupuscules politiques ne sont pas des événements indépendants les uns des autres, ils se présenteront en une même et courte période historique, contemporaine d'événements similaires en d'autres pays. Ce sera une période d'interrogation radicale de la pensée occidentale, du capitalisme qui la soutient, de la techno-structure qui en profite, du contenu de l'enseignement, de la hiérarchie des savoirs, des titres universitaires qui la cristallisent ; cette interrogation est pourtant inconditionnellement liée à chacune des formations sociales dont elle manifeste les contradictions. Le congrès de février reprend l'ensemble des débats, questions et affrontements caractéristiques de cette période troublée. Les groupuscules, survivants de la dislocation des organisations syndicales, le domineront. Tellement que ce qui demeure de syndicats étudiants verront leurs représentants s'organiser spontanément en groupuscules à l'intérieur du congrès même. Le congrès est le lieu de leur rencontre ultime. C'est d'eux qu'il sera question ici,) des thèmes de leur discours, homonymiques de par leur condition commune d'étudiant ; à la fois opposition à la « rigidité de l'intelligence contemporaine », exorcisme de la parole et copie fidèle de l'académisme.

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4

Paoli, Gloria, Gianpaolo Piscitelli, and Leonardo Trani. "Sharp estimates for the first p-Laplacian eigenvalue and for the p-torsional rigidity on convex sets with holes." ESAIM: Control, Optimisation and Calculus of Variations 26 (2020): 111. http://dx.doi.org/10.1051/cocv/2020033.

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We study, in dimension n ≥ 2, the eigenvalue problem and the torsional rigidity for the p-Laplacian on convex sets with holes, with external Robin boundary conditions and internal Neumann boundary conditions. We prove that the annulus maximizes the first eigenvalue and minimizes the torsional rigidity when the measure and the external perimeter are fixed.

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5

Amenta, Nina, and Carlos Rojas. "Dihedral deformation and rigidity." Computational Geometry 90 (October 2020): 101657. http://dx.doi.org/10.1016/j.comgeo.2020.101657.

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6

Barreira, L., Ya Pesin, and J. Sehmeling. "Multifractal spectra and multifractal rigidity for horseshoes." Journal of Dynamical and Control Systems 3, no. 1 (January 1997): 33–49. http://dx.doi.org/10.1007/bf02471761.

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7

Demaine, Erik D., Martin L. Demaine, Jin-ichi Itoh, Anna Lubiw, Chie Nara, and Joseph OʼRourke. "Refold rigidity of convex polyhedra." Computational Geometry 46, no. 8 (October 2013): 979–89. http://dx.doi.org/10.1016/j.comgeo.2013.05.002.

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8

Aryankia, Kiarash, and Rastko R. Selmic. "Spectral Properties of the Normalized Rigidity Matrix for Triangular Formations." IEEE Control Systems Letters 6 (2022): 1154–59. http://dx.doi.org/10.1109/lcsys.2021.3089136.

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9

Bhattacharya, Soumya, H. Hatwal, and A. Ghosh. "On the optimum design of Stewart platform type parallel manipulators." Robotica 13, no. 2 (March 1995): 133–40. http://dx.doi.org/10.1017/s026357470001763x.

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SummaryThis paper studies the static rigidity behaviour of a parallel manipulator with legs modelled as elastic members under axial loading. Structurally, a parallel module is more rigid compared to a serial module and is expected to take heavier payloads. Therefore, a guidance for design of such parallel manipulators is needed which leads to maximum rigidity over the workspace. In the present work, the authors propose the concept of the flexibility ellipsoid for a parallel system. Various scalar measures of rigidity are formulated on the basis of the proposed ellipsoid. An algorithm, involving multiple objective nonlinear programming technique, is implemented to decide upon some important design parameters of a generalised six degrees of freedom Stewart platform type parallel manipulator. It is observed that irrespective of the other parameters, parallel manipulators with the legs pairwise joined at the top platform possess the highest rigidity. Moreover, there exists certain kinematic dimensions for which the designed parallel system is completely free from all sorts of singularity.

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10

Zhao, Shiyu, and Daniel Zelazo. "Bearing Rigidity Theory and Its Applications for Control and Estimation of Network Systems: Life Beyond Distance Rigidity." IEEE Control Systems 39, no. 2 (April 2019): 66–83. http://dx.doi.org/10.1109/mcs.2018.2888681.

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11

Jing, Gangshan, Guofeng Zhang, Heung Wing Joseph Lee, and Long Wang. "Weak Rigidity Theory and Its Application to Formation Stabilization." SIAM Journal on Control and Optimization 56, no. 3 (January 2018): 2248–73. http://dx.doi.org/10.1137/17m1122049.

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12

Furlanetto, Francesco. "Fiscal stimulus and the role of wage rigidity." Journal of Economic Dynamics and Control 35, no. 4 (April 2011): 512–27. http://dx.doi.org/10.1016/j.jedc.2010.11.004.

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13

Ramazani, Saba, Rastko Selmic, and Marcio de Queiroz. "Rigidity-Based Multiagent Layered Formation Control." IEEE Transactions on Cybernetics 47, no. 8 (August 2017): 1902–13. http://dx.doi.org/10.1109/tcyb.2016.2568164.

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14

Gao, Qian, and Zhenglong Sun. "A Novel Design of Water-Activated Variable Stiffness Endoscopic Manipulator with Safe Thermal Insulation." Actuators 10, no. 6 (June 13, 2021): 130. http://dx.doi.org/10.3390/act10060130.

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In natural orifice transluminal endoscopic surgery (NOTES), an ideal endoscope platform should be flexible and dexterous enough to go through the natural orifices to access the lesion site inside the human body, and meanwhile provide sufficient rigidity to serve as a base for the end-effectors to operate during the surgical tasks. However, the conventional endoscope has limited ability for maintaining high rigidity over the length of the body. This paper presents a novel design of a variable stiffness endoscopic manipulator. By using a new bioplastic named FORMcard, whose stiffness can be thermally adjusted, water at different temperatures is employed to switch the manipulator between rigid mode and flexible mode. A biocompatible microencapsulated phase change material (MEPCM) with latent heat storage properties is adopted as the thermal insulation for better safety. Experiments are conducted to test the concept design, and the validated advantages of our proposed variable stiffness endoscopic manipulator include: shorter mode activation time (25 s), significantly improved stiffness in rigid mode (547.9–926.3 N·cm2) and larger stiffness-adjusting ratio (23.9–25.1 times).

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15

Poliševski, Dan. "Quasi-periodic structure optimization of the torsional rigidity." Numerical Functional Analysis and Optimization 15, no. 1-2 (January 1994): 121–29. http://dx.doi.org/10.1080/01630569408816554.

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16

Amani, Ali Moradi, Guanrong Chen, Mahdi Jalili, Xinghuo Yu, and Lewi Stone. "Distributed Rigidity Recovery in Distance-Based Formations Using Configuration Lattice." IEEE Transactions on Control of Network Systems 7, no. 3 (September 2020): 1547–58. http://dx.doi.org/10.1109/tcns.2020.2984683.

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17

Demaine, Erik D., Martin L. Demaine, Jin-ichi Itoh, Anna Lubiw, Chie Nara, and Joseph OʼRourke. "Reprint of: Refold rigidity of convex polyhedra." Computational Geometry 47, no. 3 (April 2014): 507–17. http://dx.doi.org/10.1016/j.comgeo.2013.11.001.

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18

Su, Wenshan, Yunpeng Hu, Kebo Li, and Lei Chen. "Rigidity of similarity-based formation and formation shape stabilization." Automatica 121 (November 2020): 109183. http://dx.doi.org/10.1016/j.automatica.2020.109183.

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19

Trinh, Minh Hoang, Quoc Van Tran, and Hyo-Sung Ahn. "Minimal and Redundant Bearing Rigidity: Conditions and Applications." IEEE Transactions on Automatic Control 65, no. 10 (October 2020): 4186–200. http://dx.doi.org/10.1109/tac.2019.2958563.

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20

Ruan, Yanhua, and Lang Hong. "Feature Extraction by Gaussian Mixture With Rigidity Constraint." IEEE Transactions on Automatic Control 52, no. 10 (October 2007): 1899–907. http://dx.doi.org/10.1109/tac.2007.906211.

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21

Farina, Alberto, and Enrico Valdinoci. "Pointwise estimates and rigidity results for entire solutions of nonlinear elliptic pde’s." ESAIM: Control, Optimisation and Calculus of Variations 19, no. 2 (March 14, 2013): 616–27. http://dx.doi.org/10.1051/cocv/2012024.

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22

Lei, Ao, Chuan-Xue Song, Yu-Long Lei, and Yao Fu. "Design optimization of vehicle asynchronous motors based on fractional harmonic response analysis." Mechanical Sciences 12, no. 1 (July 1, 2021): 689–700. http://dx.doi.org/10.5194/ms-12-689-2021.

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Abstract. To make vehicles more reliable and efficient, many researchers have tried to improve the rotor performance. Although certain achievements have been made, the previous finite element model did not reflect the historical process of the motor rotor well, and the rigidity and mass in rotor optimization are less discussed together. This paper firstly introduces fractional order into a finite element model to conduct the harmonic response analysis. Then, we propose an optimal design framework of a rotor. In the framework, objective functions of rigidity and mass are defined, and the relationship between high rigidity and the first-order frequency is discussed. In order to find the optimal values, an accelerated optimization method based on response surface (ARSO) is proposed to find the suitable design parameters of rigidity and mass. Because the higher rigidity can be transformed into the first-order natural frequency by objective function, this paper analyzes the first-order frequency and mass of a motor rotor in the experiment. The results proved that not only is the fractional model effective, but also the ARSO can optimize the rotor structure. The first-order natural frequency of asynchronous motor rotor is increased by 11.2 %, and the mass is reduced by 13.8 %, which can realize high stiffness and light mass of asynchronous motor rotors.

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23

Hendrickx, Julien M., Changbin Yu, Barış Fidan, and Brian D. O. Anderson. "Rigidity and persistence for ensuring shape maintenance of multi-agent meta-formations." Asian Journal of Control 10, no. 2 (2008): 131–43. http://dx.doi.org/10.1002/asjc.14.

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24

Rao, A. C. "Platform type planar robots: Topology-based selection for rigidity and work space." Journal of Robotic Systems 14, no. 5 (May 1997): 355–64. http://dx.doi.org/10.1002/(sici)1097-4563(199705)14:5<355::aid-rob2>3.0.co;2-o.

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25

De Paz, J. P. Zavala, E. Castillo Castañeda, J. Soto Herrera, and C. Turchiuli. "Measurement of Agglomerates Shape Parameters with Threedimensional Reconstruction Based on a Laser Displacement Sensor." Metrology and Measurement Systems 20, no. 3 (September 1, 2013): 407–18. http://dx.doi.org/10.2478/mms-2013-0035.

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Abstract The agglomeration of particles is a process that modifies the physical properties of a product originally manufactured as a powder. During milk powder agglomeration of fluidized bed, resulting agglomerates are sufficiently porous to improve the solubility of the final product but, at the same time, their rigidity decreases and agglomerates can be destroyed during packing. The porosity and rigidity properties depend on both the volume and shape characteristics of the agglomerates. This paper presents a three-dimensional reconstruction technique based on a laser displacement sensor (LDS) applied to characterize milk agglomerates. This technique allows three-dimensional scanning to estimate particle volume and extract shape parameters such as: sphericity, elongation and flatness ratio, shape factor and aspect ratio. This technique was implemented using a mechatronic device with two degrees of freedom. The device is composed of an angular positioning system to rotate the agglomerate and a linear positioning system to displace the LDS. Experimental result allows agglomerates classification according to shape parameters

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Dobrzynski, Michal, and Karolina Mietka. "Surface Texture after Turning for Various Workpiece Rigidities." Machines 9, no. 1 (January 12, 2021): 9. http://dx.doi.org/10.3390/machines9010009.

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In the paper, we present an analysis of the surface texture of turned parts with L/D (length/diameter) ratios of 6 and 12 and various rigidity values. The studies were carried out on samples made of S355JR steel and AISI 304 stainless steel. A detailed analysis of 2D surface profiles was carried out by using a large number of parameters that allowed us to distinguish significant differences in the surface microgeometry, which confirmed that determining surface characteristics from one height parameter (Ra—arithmetical mean height) is far from sufficient. The obtained results indicate significantly better roughness and waviness values of the AISI 304 steel surfaces in terms of its size, periodicity, and regularity. Therefore, the turning process of AISI 304 shafts with low rigidity allows one to be able to achieve better quality texture and have a positive effect on the general properties of a workpiece. In all tested samples, surface irregularities decreased along with the distance from the tailstock. The shafts with an L/D ratio of 12 had worse surfaces in the first two sections due to lower rigidity. The results received close to the three-jaw chuck, regardless of the L/D ratio and material type, demonstrated similar waviness and roughness parameters and profiles.

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27

Cai, Xiaoyu, and Marcio de Queiroz. "Adaptive Rigidity-Based Formation Control for Multirobotic Vehicles With Dynamics." IEEE Transactions on Control Systems Technology 23, no. 1 (January 2015): 389–96. http://dx.doi.org/10.1109/tcst.2014.2321664.

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28

STOICA, Nicolae-Alexandru, Alina-Maria STOICA, Andrei TUDOR, Victor MANOLIU, Mihail BOTAN, and George Catalin CRISTEA. "Correlation between the anisotropy of an AA2021-T351 aluminium rolled thick plate and the occurrence of the stick-slip phenomenon." INCAS BULLETIN 13, no. 1 (March 5, 2021): 193–201. http://dx.doi.org/10.13111/2066-8201.2021.13.1.20.

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The stick-slip phenomenon is a dynamic instability that appears at the contact interface of two sliding surfaces. Its occurrence is influenced by the relative sliding speed, the contact pressure, and the system rigidity, but also by the state of contact between the two sliding surfaces. The present paper aims to study the influence of the anisotropy of an aluminium AA2021-T351 plate on the stick-slip phenomenon. For this, using the CETR UMT II tribometer, linear sliding tests have been performed on the aluminium alloy thick plate surface using a cylindrical pin made of ultra-high-molecular-weight polyethylene (UHMWPE) along three directions: a longitudinal one, corresponding to the rolling direction of the sample (0°), a transverse one, perpendicular to the rolling direction (90°), and a median direction (45°). Varying the sliding speed, the contact pressure, and the system rigidity, it was possible to observe the influence of the material anisotropy on the specific parameters of the stick-slip phenomenon.

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29

Brasco, Lorenzo. "On torsional rigidity and principal frequencies: an invitation to the Kohler−Jobin rearrangement technique." ESAIM: Control, Optimisation and Calculus of Variations 20, no. 2 (February 6, 2014): 315–38. http://dx.doi.org/10.1051/cocv/2013065.

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30

Yu, Changbin, Julien M. Hendrickx, Barış Fidan, Brian D. O. Anderson, and Vincent D. Blondel. "Three and higher dimensional autonomous formations: Rigidity, persistence and structural persistence." Automatica 43, no. 3 (March 2007): 387–402. http://dx.doi.org/10.1016/j.automatica.2006.08.025.

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31

Avetisyan, Zh, D. Harutyunyan, and N. Hovsepyan. "Rigidity of a Thin Domain Depends on the Curvature, Width, and Boundary Conditions." Applied Mathematics & Optimization 84, no. 3 (February 16, 2021): 3229–54. http://dx.doi.org/10.1007/s00245-021-09746-y.

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32

Chen, M. X., Q. P. Sun, Z. Wu, and M. M. F. Yuen. "A Wrinkled Membrane Model for Cloth Draping with Multigrid Acceleration." Journal of Manufacturing Science and Engineering 121, no. 4 (November 1, 1999): 695–700. http://dx.doi.org/10.1115/1.2833109.

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Fabric is modeled as a particular type of membrane formed from two orthogonal families of yarns. In contrast to usual membrane theory, the fabric is regarded to possess a certain compressive rigidity which is much weaker than its tensile rigidity. An energy density function is defined corresponding to the material model. The finite element formulation is based on the total Lagrangian approach. Four node quadrilateral elements are adopted. An accelerated multigrid technique using the conjugate gradient method as basic iterative method is employed to minimize energy to reach the final equilibrium position. Two examples of fabric draping are analyzed using the proposed model. The influence of the material parameters on the draping behavior is discussed.

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33

Williams, Ryan K., Andrea Gasparri, Attilio Priolo, and Gaurav S. Sukhatme. "Evaluating Network Rigidity in Realistic Systems: Decentralization, Asynchronicity, and Parallelization." IEEE Transactions on Robotics 30, no. 4 (August 2014): 950–65. http://dx.doi.org/10.1109/tro.2014.2315713.

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34

Yu, Changbin, and Brian D. O. Anderson. "Development of redundant rigidity theory for formation control." International Journal of Robust and Nonlinear Control 19, no. 13 (September 10, 2009): 1427–46. http://dx.doi.org/10.1002/rnc.1386.

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35

Hou, Yun, and Changbin Yu. "Elementary operations for rigidity restoration and persistence analysis of multi-agent system." IET Control Theory & Applications 10, no. 2 (January 19, 2016): 119–25. http://dx.doi.org/10.1049/iet-cta.2015.0197.

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36

Świć, Antoni, Łukasz Sobaszek, Arkadiusz Gola, and Olga Orynycz. "Clasiffication and Analysis of Typical Structures of Dynamic Systems of Machining of Low-Rigidity Shafts." IFAC-PapersOnLine 52, no. 10 (2019): 142–47. http://dx.doi.org/10.1016/j.ifacol.2019.10.036.

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37

Liu, Qirui, Rongke Liu, Zijie Wang, and John S. Thompson. "UAV Swarm-Enabled Localization in Isolated Region: A Rigidity-Constrained Deployment Perspective." IEEE Wireless Communications Letters 10, no. 9 (September 2021): 2032–36. http://dx.doi.org/10.1109/lwc.2021.3091215.

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38

Cao, Kun, Zhimin Han, Xiuxian Li, and Lihua Xie. "Ratio-of-Distance Rigidity Theory With Application to Similar Formation Control." IEEE Transactions on Automatic Control 65, no. 6 (June 2020): 2598–611. http://dx.doi.org/10.1109/tac.2019.2938318.

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39

Golubeva, V. A., and V. P. Leksin. "Rigidity Theorems for Multiparametric Deformations of Algebraic Structures, Associated with the Knizhnik–Zamolodchikov Equations." Journal of Dynamical and Control Systems 13, no. 2 (April 3, 2007): 161–71. http://dx.doi.org/10.1007/s10883-007-9016-6.

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40

Cao, Kun, Dongyu Li, and Lihua Xie. "Bearing-ratio-of-distance rigidity theory with application to directly similar formation control." Automatica 109 (November 2019): 108540. http://dx.doi.org/10.1016/j.automatica.2019.108540.

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41

Kwon, Seong-Ho, and Hyo-Sung Ahn. "Generalized weak rigidity: Theory, and local and global convergence of formations." Systems & Control Letters 146 (December 2020): 104800. http://dx.doi.org/10.1016/j.sysconle.2020.104800.

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42

Buttazzo, Giuseppe, and Aldo Pratelli. "An application of the continuous Steiner symmetrization to Blaschke-Santaló diagrams." ESAIM: Control, Optimisation and Calculus of Variations 27 (2021): 36. http://dx.doi.org/10.1051/cocv/2021038.

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In this paper we consider the so-called procedure of Continuous Steiner Symmetrization, introduced by Brock in [F. Brock, Math. Nachr. 172 (1995) 25–48 and F. Brock, Proc. Indian Acad. Sci. 110 (2000) 157–204]. It transforms every open set Ω ⊂⊂ ℝd into the ball keeping the volume fixed and letting the first eigenvalue and the torsional rigidity respectively decrease and increase. While this does not provide, in general, a γ-continuous map t ↦ Ωt, it can be slightly modified so to obtain the γ-continuity for a γ-dense class of domains Ω, namely, the class of polyhedral sets in ℝd. This allows to obtain a sharp characterization of the Blaschke-Santaló diagram of torsion and eigenvalue.

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43

Arnaud, Lionel, Oscar Gonzalo, Sébastien Seguy, Haritz Jauregi, and Grégoire Peigné. "Simulation of low rigidity part machining applied to thin-walled structures." International Journal of Advanced Manufacturing Technology 54, no. 5-8 (October 19, 2010): 479–88. http://dx.doi.org/10.1007/s00170-010-2976-9.

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44

Zhou, Hanming. "Lens rigidity with partial data in the presence of a magnetic field." Inverse Problems & Imaging 12, no. 6 (2018): 1365–87. http://dx.doi.org/10.3934/ipi.2018057.

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IVANNIKOV, Sergei I., Yana A. VAHTEROVA, Yuri A. UTKIN, and Ying SUN. "Calculation of strength, rigidity, and stability of the aircraft fuselage frame made of composite materials." INCAS BULLETIN 13, S (August 3, 2021): 77–86. http://dx.doi.org/10.13111/2066-8201.2021.13.s.8.

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Carbon-carbon composite materials (CCCM) are characterized by high heat resistance and thermostability for which they, in most of their physical and mechanical characteristics, can be attributed to the most promising materials. Approximately 81% of all carbon-carbon composite materials are used for the manufacture of brake rotors for aircraft, 18% – in space rocket technology, and only 1% – for all other areas of application. This study discusses calculations of the strength, rigidity, and stability of a frame made of carbon-carbon composite materials. It is known that the strength of CCCM based on high-strength carbon fibers is higher than the strength of a composite material based on high-modulus carbon fibers obtained at various processing temperatures. The stress-strain behaviour (SSB) of the material is carried out. Among the special properties of CCCM are low porosity, low coefficient of thermal expansion, maintaining a stable structure and properties, as well as product dimensions.

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Bereg, Sergey. "Efficient algorithms for the d-dimensional rigidity matroid of sparse graphs." Computational Geometry 40, no. 1 (May 2008): 37–44. http://dx.doi.org/10.1016/j.comgeo.2006.11.005.

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PARBERY, R. D. "ON MINIMUM-AREA CONVEX SHAPES OF GIVEN TORSIONAL AND FLEXURAL RIGIDITY." Engineering Optimization 13, no. 3 (June 1988): 189–96. http://dx.doi.org/10.1080/03052158808940954.

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Vuckovac, Rade. "Cryptographic Puzzles and Complex Systems." Complex Systems 30, no. 3 (September 15, 2021): 375–90. http://dx.doi.org/10.25088/complexsystems.30.3.375.

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A puzzle lies behind password authentication (PA) and blockchain proof of work (PoW). A cryptographic hash function is commonly used to implement them. The potential problem with secure hash functions is their complexity and rigidity. We explore the use of complex systems constructs such as a cellular automaton (CA) to provide puzzle functionality. The analysis shows that computational irreducibility and sensitivity to initial state phenomena are enough to create simple puzzle systems that can be used for PA and PoW. Moreover, we present puzzle schemata using CA and n-body problems.

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Gao, Shoufeng, Li Jiao, Pei Yan, Siqin Pang, Zhenxin Peng, Xuechun Shi, Zhao Wang, and Xibin Wang. "Research on machining quality control in micro milling of low-rigidity characteristics." International Journal of Advanced Manufacturing Technology 93, no. 5-8 (June 26, 2017): 2045–59. http://dx.doi.org/10.1007/s00170-017-0648-8.

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Jordán, Tibor, and Zoltán Szabadka. "Operations preserving the global rigidity of graphs and frameworks in the plane." Computational Geometry 42, no. 6-7 (August 2009): 511–21. http://dx.doi.org/10.1016/j.comgeo.2008.09.007.

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