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Articoli di riviste sul tema "Virtual initial mass model"

Autore: Grafiati

Pubblicato: 25 gennaio 2025

Ultima modifica: 31 luglio 2025

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1

Khaimovich, A. I., M. A. Bolotov, and E. Yu Pechenina. "Model of virtual balancing of rigid rotors." VESTNIK of Samara University. Aerospace and Mechanical Engineering 21, no. 1 (2022): 99–109. http://dx.doi.org/10.18287/2541-7533-2022-21-1-99-109.

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Rotor imbalances have a significant impact on the level of their vibration and reliability. Reduction of rotor imbalances is achieved through static and dynamic balancing that we propose to accomplish by virtual balancing of rigid rotors in two stages. At the first stage mutual orientation of the rotor parts is calculated to compensate their imbalances and couple unbalance. At the second stage the values of the masses and angular coordinates of two correction weights that allow eliminating the residual imbalance of the rotor are determined. The correction weights are placed in two balancing pl

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2

Shin, Jihye, Sungsoo S. Kim, and Koji Takahashi. "Dynamical Evolution of the Mass Function of the Galactic Globular Cluster System." Proceedings of the International Astronomical Union 3, S246 (2007): 433–34. http://dx.doi.org/10.1017/s174392130801613x.

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AbstractUsing the most advanced anisotropic (2D) Fokker-Planck (FP) models, we calculate the evolution of the mass functions of the Galactic globular cluster system (GCMF). Our models include two-body relaxation, binary heating, tidal shocks, dynamical friction, stellar evolution, and realistic cluster orbits. We perform 2D-FP simulations for a large number of virtual globular clusters and synthesize these results to study the relation between the initial and present GCMFs. We found two probable IGCMFs that eventually evolve into the Milky Way GCMF : truncated power-law, and log-normal model w

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3

Chen, Wenxing, Chuxiang Zhou, Hao Zhang, et al. "Construction of Prediction Models of Mass Ablation Rate for Silicone Rubber-Based Flexible Ablative Composites Based on a Small Dataset." Applied Sciences 14, no. 17 (2024): 8007. http://dx.doi.org/10.3390/app14178007.

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The prediction of the ablation rate of silicone rubber-based composites is of great significance to accelerate the development of flexible thermal protection materials. Herein, a method which combines uniform design experimentation, active learning, and virtual sample generation was proposed to establish a prediction model of the mass ablation rate based on a small dataset. Briefly, a small number of sample points were collected using uniform design experimentation, which were marked to construct the initial dataset and primitive model. Then, data points were acquired from the sample pool and

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4

Zhang, Qingxia, Dengzheng Xu, Jilin Hou, Łukasz Jankowski, and Haiyan Wang. "Damage Identification Method Using Additional Virtual Mass Based on Damage Sparsity." Applied Sciences 11, no. 21 (2021): 10152. http://dx.doi.org/10.3390/app112110152.

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Damage identification methods based on structural modal parameters are influenced by the structure form, number of measuring sensors and noise, resulting in insufficient modal data and low damage identification accuracy. The additional virtual mass method introduced in this study is based on the virtual deformation method for deriving the frequency-domain response equation of the virtual structure and identify its mode to expand the modal information of the original structure. Based on the initial condition assumption that the structural damage was sparse, the damage identification method base

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5

Chen, Ke, Xue Feng Tong, and Xin Fang Wang. "Simulation and Analysis on Vehicle Frontal Crash Based on Virtual Proving Ground." Applied Mechanics and Materials 128-129 (October 2011): 1222–25. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.1222.

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Based on the vehicle crash finite element theory and the virtual proving ground (VPG), vehicle frontal crash is simulated. Under the VPG environment, the unit element meshes are determined for the entire vehicle CAD model, whereas the element types and material parameters, together with welding nodes, contacts and constraints are defined. According to the ECER94 safety regulations, a rigid wall model, along with initial crash conditions is established. By calling the LS-DYNA, the simulation model is calculated and the stress distribution, vehicle body aberration nephogram, energy and accelerat

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6

Verbeke, C., J. Pomoell, and S. Poedts. "The evolution of coronal mass ejections in the inner heliosphere: Implementing the spheromak model with EUHFORIA." Astronomy & Astrophysics 627 (July 2019): A111. http://dx.doi.org/10.1051/0004-6361/201834702.

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Aims. We introduce a new model for coronal mass ejections (CMEs) that has been implemented in the magnetohydrodynamics (MHD) inner heliosphere model EUHFORIA. Utilising a linear force-free spheromak (LFFS) solution, the model provides an intrinsic magnetic field structure for the CME. As a result, the new model has the potential to predict the magnetic components of CMEs at Earth. In this paper, we present the implementation of the new model and show the capability of the new model. Methods. We present initial validation runs for the new magnetised CME model by considering the same set of even

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7

Darman, D. R., A. Suhandi, I. Kaniawati, and A. Samsudin. "Designing of virtual laboratory on elasticity for Physics learning." Journal of Physics: Conference Series 2596, no. 1 (2023): 012061. http://dx.doi.org/10.1088/1742-6596/2596/1/012061.

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Abstract Elasticity is one of the materials that students learn through laboratory experiments. In general, real and virtual laboratory conditions are still limited to spring elasticity experiments where the elasticity properties can be observed directly to determine the material’s elastic modulus. While on other objects and materials, elasticity experiments are still problematic to do because of the limitations of measuring instruments and microscopic observation scales. This study aims to produce a virtual laboratory of the Elasticity of various materials using wire for physics learning in u

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8

Kattel, Parameshwari, Khim B. Khattri, Puskar R. Pokhrel, Jeevan Kafle, Bhadra Man Tuladhar, and Shiva P. Pudasaini. "Simulating glacial lake outburst floods with a two-phase mass flow model." Annals of Glaciology 57, no. 71 (2016): 349–58. http://dx.doi.org/10.3189/2016aog71a039.

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AbstractTo simulate a glacial lake outburst flood, we employ a comprehensive physically based general two-phase mass flow model (Pudasaini, 2012). This model accounts for a strong interaction between the solid and fluid phases and incorporates buoyancy and other dominant physical aspects of the mass flows such as enhanced non-Newtonian viscous stress, virtual mass force and generalized drag. Our real two-phase mass flow simulation describes explicit evolution of the solid and fluid phases and the debris bulk as a whole, akin to torrential debris flows or debris floods during glacial lake outbu

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9

Илюшкин, Дмитрий, Dmitriy Ilyushkin, Наталья Жижкина, Natalya Zhizhkina, Екатерина Зенцова, and Ekaterina Zentsova. "VIRTUAL SIMULATION OF ROLLER SPUN CASTING." Bulletin of Bryansk state technical university 2016, no. 1 (2016): 22–27. http://dx.doi.org/10.12737/18174.

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The work is devoted to the virtual simulation of a sheet roll working layer formation at a technological stage “casting-solidification”. To form a virtual model of a roller mould pouring and foundry solidification there was used a computer modeling system (CMS) which included initial and boundary conditions for a roller mould pouring process with highalloy cast iron in the field of centrifugal force action. The distribution of a metal working layer along an inner surface of a rotating mould at different technological parameters: mass of highalloy cast iron, its density, temperature and pouring

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10

Fishwick, Paul A. "Aesthetic Programming: Crafting Personalized Software." Leonardo 35, no. 4 (2002): 383–90. http://dx.doi.org/10.1162/002409402760181178.

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Marrying traditional methods of computer programming with an artistic temperament allows the birth of a new phenomenon: the aesthetic program. The work of the author and his students builds on visual ap-proaches in programming as well as in software modeling, leading toward a gradual evolution from program to model. The need for the aes-thetic model is increased with the importance of personalized, individually tailored media, as found with web-based style sheets and the economic movement termed “mass customization.” The author and his students have formulated the rube Project methodology arou

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11

Ragauskas, Alyse M. E., Anthony M. Scott, Dudley B. Christie, Danny M. Vaughn, Amy B. Christie, and Dennis W. Ashley. "Strategies for General Surgery Training Programs During the COVID-19 Pandemic." American Surgeon 86, no. 11 (2020): 1501–7. http://dx.doi.org/10.1177/0003134820966271.

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The COVID-19 pandemic presented a unique challenge for Medical systems worldwide. Initial response to the crisis situation for the pandemic closely mirrored plans for a mass casualty event. By leveraging resources including human and physical, and by dividing our surgeon workforce into micro teams we were able to create a flexible and responsive infrastructure to address the crisis as it unfolded. By adoption of virtual platforms and equal division of labor, surgical resident education was continued. Specific adjustments to the schedule and curriculum for medical students allowed them to conti

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Onundi, L.O, D.S Matawal, and A.U Elinwa. "THE INFLUENCE OF EULER CRITICAL LOAD ON THE METHOD OF INITIAL PARAMETERS FOR THE DYNAMIC ANALYSIS OF A MULTI-STOREY BUILDING SUBJECTED TO AERODYNAMIC FORCES." Continental J. Engineering Sciences 5, no. 1 (2010): 1–13. https://doi.org/10.5281/zenodo.833729.

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This research work used a combination of the method of virtual works and Euler’s critical load to determine modified stiffness, angular frequency and later the generalised flexural rigidity EI<sub>on</sub> by taking into consideration the influence of axial load and consequently the total modal mass (m ) on the model (multi-storey building). The study used these modified and assessed quantities, on the original equations governing the method of initial parameters to transform them from one hitherto recognised as suitable for the design of a beam on elastic foundation; to another one now propos

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13

Di Egidio, Angelo, and Alessandro Contento. "Seismic Benefits from Coupling Frame Structures with a Hysteretic Mass Damper Inerter." Applied Sciences 13, no. 8 (2023): 5017. http://dx.doi.org/10.3390/app13085017.

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The coupling of frame structures with external oscillating bodies, such as rigid walls, dynamic mass absorbers, elastoplastic dampers, or tuned mass dampers, can be effective in reducing the displacements of the structure and protecting it against seismic loads. This paper proposes connecting an external oscillating body to the first story of a frame structure and studying the effectiveness of the coupling by evaluating the reduction in the displacements of the frame structure. The inertial effects of the oscillating body are increased by introducing a virtual mass, provided by an inerter devi

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FRÉMOND, MICHEL, and ELISABETTA ROCCA. "WELL-POSEDNESS OF A PHASE TRANSITION MODEL WITH THE POSSIBILITY OF VOIDS." Mathematical Models and Methods in Applied Sciences 16, no. 04 (2006): 559–86. http://dx.doi.org/10.1142/s0218202506001261.

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The paper deals with a phase transition model applied to a two-phase system. There is a wide literature on the study of phase transition processes in case that no voids nor overlapping can occur between the two phases. The main novelty of our approach is the possibility of having voids during the phase change. This aspect is described in the model by the mass balance equation whose effects are included by means of the pressure of the system in the dynamical relations. The state variables are the absolute temperature (whose evolution is ruled by the entropy balance equation), the strain tensor

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15

Ferro, Rodrigo, João Victor P. de Oliveira, Gabrielly A. Cordeiro, and Robert E. C. Ordóñez. "Application of Modeling and Simulation in a Self-Reprogrammable Prototype of a Manufacturing System." Applied Sciences 15, no. 6 (2025): 3298. https://doi.org/10.3390/app15063298.

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Shorter product life cycles and the growing demand for mass customization have led to the development of complex production systems, which are crucial for maintaining competitiveness. In this context, digital technologies and simulation tools play a fundamental role in integrating virtual and physical systems to enhance operational performance. This study presents a prototype for self-programming manufacturing systems, achieved through the integration of computer simulation and production management tools, leveraging the Digital Twin (DT) concept. To validate this approach, a prototype capable

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16

Shaomin, Luo, Yan Zou, Xu Cheng, and Li Juan. "Dynamic behavior analysis of a reciprocating mechanism with clearance considering parameter uncertainty." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 6 (2019): 1182–95. http://dx.doi.org/10.1177/0954406219891196.

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In this study, a numerical investigation on the dynamic characteristics of a reciprocating mechanism with clearance considering parameter uncertainty is presented. For this purpose, complex space motion between parts is converted into simplified motion of basic component based on the proposed mass substitution model. The contact model in motion parts is established using the Lankarani–Nikravesh model, and the friction effect is considering using a modified Coulomb friction model in the proposed methodology. The comparisons between the numerical results, experimental ones, and virtual simulatio

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17

Hu, Xiaofei, Yang Zhou, and Qunshan Shi. "Method for 2D-3D Registration under Inverse Depth and Structural Semantic Constraints for Digital Twin City." Applied Sciences 12, no. 17 (2022): 8543. http://dx.doi.org/10.3390/app12178543.

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A digital twin city maps a virtual three-dimensional (3D) city model to the geographic information system, constructs a virtual world, and integrates real sensor data to achieve the purpose of virtual–real fusion. Focusing on the accuracy problem of vision sensor registration in the virtual digital twin city scene, this study proposes a 2D-3D registration method under inverse depth and structural semantic constraints. First, perspective and inverse depth images of the virtual scene were obtained by using perspective view and inverse-depth nascent technology, and then the structural semantic fe

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18

Carlotta, Bogena, Sirarpi Hovsepyan, and Paolo Mercorelli. "Conception and analysis of Cascaded Dual Kalman Filters as virtual sensors for mastication activity of stomatognathic craniomandibular system." Journal of Physics: Conference Series 2162, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1742-6596/2162/1/012017.

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Abstract The presented work shows a possible methodical approach for parameter estimation of a kinematic and dynamic element that characterizes a human mandibular system during the mastication process using position measurement only. The considered parameters are the velocity, friction coefficient, and the mass of the moving part of the mandibular during the mastication activity of a human. Internal or optical motion sensors can still allow imprecision in the measurements. To overcome these, in the present work a system identification algorithm is designed using a combination of three backward

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19

Feng, Xiao Qiang, Zhan Ke Li, Jian Hua Sang, and Bi Feng Song. "Optimization of Sonic Boom Suppression by Off-Body Energy Deposition." Applied Mechanics and Materials 477-478 (December 2013): 7–13. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.7.

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Sonic boom suppression method is the key technology of next generation supersonic aircraft. Low boom mechanism of the off-body energy deposition is analyzed by using the thermal chocking model. The mass flux of energy deposition region is small than no energy deposition region, and off-body energy deposition will induce a bow shock wave. The mechanism of off body energy deposition is similar with quiet spike, so it can be regard as a virtual quiet spike. Off-body energy deposition analysis software is developed based on CFD, waveform parameter method and NSGA-II genetic algorithm. The location

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20

Liu, Aihua, Qiang Yang, Xin Zhang, and Weibo Deng. "Direction-of-Arrival Estimation for Coprime Array Using Compressive Sensing Based Array Interpolation." International Journal of Antennas and Propagation 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6425067.

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A method of direction-of-arrival (DOA) estimation using array interpolation is proposed in this paper to increase the number of resolvable sources and improve the DOA estimation performance for coprime array configuration with holes in its virtual array. The virtual symmetric nonuniform linear array (VSNLA) of coprime array signal model is introduced, with the conventional MUSIC with spatial smoothing algorithm (SS-MUSIC) applied on the continuous lags in the VSNLA; the degrees of freedom (DoFs) for DOA estimation are obviously not fully exploited. To effectively utilize the extent of DoFs off

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Drama, Özge, Johanna Vielemeyer, Alexander Badri-Spröwitz, and Roy Müller. "Postural stability in human running with step-down perturbations: an experimental and numerical study." Royal Society Open Science 7, no. 11 (2020): 200570. http://dx.doi.org/10.1098/rsos.200570.

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Postural stability is one of the most crucial elements in bipedal locomotion. Bipeds are dynamically unstable and need to maintain their trunk upright against the rotations induced by the ground reaction forces (GRFs), especially when running. Gait studies report that the GRF vectors focus around a virtual point above the centre of mass (VP A ), while the trunk moves forward in pitch axis during the stance phase of human running. However, a recent simulation study suggests that a virtual point below the centre of mass (VP B ) might be present in human running, because a VP A yields backward tr

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Li, Junqiu, Yihe Wang, and Yizheng Wang. "Optimal control for jitter suppression of clutch engagement in upshift process of electric vehicles." Advances in Mechanical Engineering 8, no. 12 (2016): 168781401667484. http://dx.doi.org/10.1177/1687814016674847.

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In the shift process of large-order automatic transmission, jitter phenomenon is common in clutch engagement process, which greatly affects the ride comfort of the vehicle. In this article, the jitter dynamic model of clutch engagement process was established with lumped mass method and virtual displacement principle. Specific to clutch engagement stage, the optimal control of the coordination between driving motor and wet clutch was studied. In accordance with the jitter dynamic model, the state–space equation with controlling variables of motor torque and clutch friction torque was establish

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Du, Chenxi, Xianzhi Ao, Bingxian Luo, et al. "Ensemble Numerical Simulations of Realistic SEP Events and the Inspiration for Space Weather Awareness." Research in Astronomy and Astrophysics 22, no. 2 (2022): 025003. http://dx.doi.org/10.1088/1674-4527/ac3adb.

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Abstract The solar energetic particle (SEP) event is a kind of hazardous space weather phenomena, so its quantitative forecast is of great importance from the aspect of space environmental situation awareness. We present here a set of SEP forecast tools, which consists of three components : (1) a simple polytropic solar wind model to estimate the background solar wind conditions at the inner boundary of 0.1 AU (about 20 R ⊙); (2) an ice-cream-cone model to estimate the erupted coronal mass ejection (CME) parameters; and (3) the improved Particle Acceleration and Transport in the Heliosphere (i

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Lailatussaadah, Lailatussaadah, Asyraf Isyraqi Bin Jamil, and Fakhrul Adabi Bin Abdul Kadir. "Forging New Educational Horizons: Unveiling Virtual Extracurricular Transformation in High School Amidst the COVID- 19." Idarah (Jurnal Pendidikan dan Kependidikan) 7, no. 1 (2023): 69–84. http://dx.doi.org/10.47766/idarah.v7i1.1484.

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Abstract: The educational landscape has undergone significant transformations in the wake of the COVID-19 pandemic, with one notable change being the adoption of virtual platforms for conducting extracurricular activities. This approach marks a departure from traditional practices, as these activities were previously never executed in such a manner. Therefore, this study aims to identify the various forms of virtual implementation of extracurricular activities during the COVID-19 pandemic. In this study, a mixed-methods approach is intended to analyze needs as an initial step in designing the

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Popov, A. M., S. M. Muzhichek, M. A. Korzun, et al. "Mathematical Model of Impact Projectile Flight Dynamics as an Element of its Digital Twin." Mekhatronika, Avtomatizatsiya, Upravlenie 25, no. 1 (2024): 31–42. http://dx.doi.org/10.17587/mau.25.31-42.

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This paper gives the analysis of the structure and characteristics of the mathematical model of the impact projectile’s flight dynamics. The model is designed for being used as an element of the projectile’s digital twin. The model is based on differential motion equations of a gyro-stabilized solid with an axisymmetric mass distribution. Different types of angle variables were chosen for describing aerodynamics and formulating equations of motion. Non-linear (considering the nutation angle) dependences for aerodynamic coefficients are proposed. They are created by applying proven scientific c

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Vaddi, Kiran, and Olga Wodo. "Active Knowledge Extraction from Cyclic Voltammetry." Energies 15, no. 13 (2022): 4575. http://dx.doi.org/10.3390/en15134575.

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Cyclic Voltammetry (CV) is an electro-chemical characterization technique used in an initial material screening for desired properties and to extract information about electro-chemical reactions. In some applications, to extract kinetic information of the associated reactions (e.g., rate constants and turn over frequencies), CV curve should have a specific shape (for example an S-shape). However, often the characterization settings to obtain such curve are not known a priori. In this paper, an active search framework is defined to accelerate identification of characterization settings that ena

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Kazakova, M., and G. L. Richard. "A new model of shoaling and breaking waves: one-dimensional solitary wave on a mild sloping beach." Journal of Fluid Mechanics 862 (January 15, 2019): 552–91. http://dx.doi.org/10.1017/jfm.2018.947.

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We present a new approach to model coastal waves in the shoaling and surf zones. The model can be described as a depth-averaged large-eddy simulation model with a cutoff in the inertial subrange. The large-scale turbulence is explicitly resolved through an extra variable called enstrophy while the small-scale turbulence is modelled with a turbulent-viscosity hypothesis. The equations are derived by averaging the mass, momentum and kinetic energy equations assuming a shallow-water flow, a negligible bottom shear stress and a weakly turbulent flow assumption which is not restrictive in practice.

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Kurniawan, Bayu, Wahyu Djoko Sulistyo, and Listyo Yudha Irawan. "UI/UX Design Development for The SiCamar Application: A VR-Based Interactive Learning Media." Indonesian Journal of Social Science Education (IJSSE) 7, no. 1 (2025): 34. https://doi.org/10.29300/ijsse.v7i1.6902.

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The rapid advancement of technology significantly affects various life aspects, notably education. Virtual reality (VR) is a key technology that enables the creation of educational media for historical sites. However, previous research indicates limitations in features and accessibility. This study aims to develop a prototype application called SiCamar (Malang Raya Temple Site) based on VR. Using a research and development (R&D) approach, we applied the ADDIE model, focusing only on the Analysis, Design, and Development stages since the goal was to create a prototype and test its initial f

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Shastry, K. Aditya, B. A. Manjunatha, T. G. Mohan Kumar, and D. U. Karthik. "Generative Adversarial Networks Based Scene Generation on Indian Driving Dataset." Journal of ICT Research and Applications 17, no. 2 (2023): 181–200. http://dx.doi.org/10.5614/itbj.ict.res.appl.2023.17.2.4.

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The rate of advancement in the field of artificial intelligence (AI) has drastically increased over the past twenty years or so. From AI models that can classify every object in an image to realistic chatbots, the signs of progress can be found in all fields. This work focused on tackling a relatively new problem in the current scenario-generative capabilities of AI. While the classification and prediction models have matured and entered the mass market across the globe, generation through AI is still in its initial stages. Generative tasks consist of an AI model learning the features of a giv

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Kotova, Ekaterina O. "Linguoecological Assessment of the Readability of Russian Longreads (Statistical Approach)." Proceedings of Southern Federal University. Philology 2021, no. 2 (2021): 67–76. http://dx.doi.org/10.18522/1995-0640-2021-2-67-76.

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The study is devoted to the use of a mathematical model for calculating the readability index of a text as one of the tools for linguoecological assessment of a journalistic text. The research material was 20 longreads published in Russian electronic editions. The specificity of the research object lies in the fact that it is both a kind of journalistic discourse and an element of the digital space. In the study formal mathematical and statistical research methods were used, based on the determination of readability values, i.e. ease of human perception of texts. A linguoecological assessment

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Mousaviraad, Mohammad, Mehari Z. Tekeste, and Kurt A. Rosentrater. "Calibration and Validation of a Discrete Element Model of Corn Using Grain Flow Simulation in a Commercial Screw Grain Auger." Transactions of the ASABE 60, no. 4 (2017): 1403–15. http://dx.doi.org/10.13031/trans.12200.

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Abstract. Screw augers are primary grain conveying equipment in the agriculture industry. Quantitative prediction of grain conveyance using screw augers requires better understanding and measurement of bulk particle-particle and particle-rigid-body interactions. Discrete element modeling (DEM) has potential to simulate particle dynamics and flow within a screw auger and thus provide simulation-based guidance for auger design and operating parameters. The objective of this study was to develop a DEM corn model calibration methodology and validation for combine-harvested corn flow in a commercia

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Frith, H., and R. Blake. "The mechanical power output and hydromechanical efficiency of northern pike (Esox lucius) fast-starts." Journal of Experimental Biology 198, no. 9 (1995): 1863–73. http://dx.doi.org/10.1242/jeb.198.9.1863.

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The mechanical power output and hydrodynamic efficiency of northern pike, Esox lucius, during acceleration from rest (fast-start) are calculated from hydrodynamic theory for two kinematic patterns, C-starts (used in escape) and S-starts (used in prey capture). The Weihs model is employed and modified to calculate the mechanical power produced by a fish during a fast-start. A term is included for the power required to accelerate body sections laterally. Lateral deceleration of fish body sections and their associated added mass are expressed as an active process requiring energy expenditure or a

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Ding, Xiaoyu, Wei Wang, and Xinbo Chen. "Vibration Principles Research of Novel Power Electronic Module as Dynamic Vibration Absorber for Chassis-By-Wire." Machines 12, no. 12 (2024): 932. https://doi.org/10.3390/machines12120932.

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This paper presents a novel power electronic module (PEM) for chassis-by-wire in passenger cars. The PEM is supposed to be installed in a close-to-wheel position, which provides electrical interfaces with a power harness and signal harness. When the vehicle is driving, the PEM works as a dynamic vibration absorber (DVA) to diminish the negative effects of un-sprung mass. Based on the vibration system model, the mechanical principles are analyzed and the design parameters are mathematically optimized. For a comparison of different configuration schemes with an in-wheel motor (IWM), we take the

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Amoskov, Victor M., Vyacheslav N. Vasiliev, Elena I. Gapionok, et al. "Modelling and design of permanent magnet multipoles for beam transport and focusing. I. Selection of optimal design and parameters." Vestnik of Saint Petersburg University. Applied Mathematics. Computer Science. Control Processes 17, no. 4 (2021): 313–29. http://dx.doi.org/10.21638/11701/spbu10.2021.401.

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The design and specification choices are described for a PM quadrupole used to enable beam transport in a cyclotron. First an analytic study with a simplified 2D model is performed to give initial values for magnet configuration and performance. Characteristics of PM blocks and cylinders are analysed. Then a 3D parametrized model is used to solve the direct magnetostatic problem and accurately define quad specifications. Simulations are carried out with KOMPOT electromagnetic code utilizing the differential formulation. The regulariza- tion method is applied to solve the inverse problem. Magne

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Cheuk, Bonnie. "Applying Sense-Making and Narrative Techniques to Capture Lessons Learnt." Journal of Information & Knowledge Management 06, no. 03 (2007): 165–71. http://dx.doi.org/10.1142/s0219649207001780.

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This case study demonstrates how we have designed a knowledge management project around story-telling ("narrative" feedback). The aim is to create a global virtual space for sharing of good and bad experiences from the commissioning pilot. This project is also designed to help senior managers understand the experiences of the pilot phase of a major change programme within the British Council. The change programme (referred to as commissioning change programme) is about introducing a new internal model/process to release funding to support new products and services' development and implementati

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Ngo, Ba-Viet, and Thanh-Hai Nguyen. "A Semi-Automatic Wheelchair with Navigation Based on Virtual-Real 2D Grid Maps and EEG Signals." Applied Sciences 12, no. 17 (2022): 8880. http://dx.doi.org/10.3390/app12178880.

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A semi-automatic wheelchair allows disabled people to possibly control in an indoor environment with obstacles and targets. The paper proposes an EEG-based control system for the wheelchair based on a grid map designed to allow disabled people to reach any preset destination. In particular, the grid map is constructed by dividing it into grid cells that may contain free spaces or obstacles. The map with the grid cells is simulated to find the optimal paths to the target positions using a Deep Q-Networks (DQNs) model with the Parametric Rectified Linear Unit (PReLU) activation function, in whic

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Yan, Lingyun, Guowu Wei, Zheqi Hu, Haohua Xiu, Yuyang Wei, and Lei Ren. "Low-Cost Multisensor Integrated System for Online Walking Gait Detection." Journal of Sensors 2021 (August 14, 2021): 1–15. http://dx.doi.org/10.1155/2021/6378514.

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A three-dimensional motion capture system is a useful tool for analysing gait patterns during walking or exercising, and it is frequently applied in biomechanical studies. However, most of them are expensive. This study designs a low-cost gait detection system with high accuracy and reliability that is an alternative method/equipment in the gait detection field to the most widely used commercial system, the virtual user concept (Vicon) system. The proposed system integrates mass-produced low-cost sensors/chips in a compact size to collect kinematic data. Furthermore, an x86 mini personal compu

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Kulkarni, Siddharth, David John Edwards, Craig Chapman, M. Reza Hosseini, and De-Graft Owusu-Manu. "A preliminary mechanical design evaluation of the Wikispeed car: for light-weighting implications." Journal of Engineering, Design and Technology 17, no. 1 (2019): 230–49. http://dx.doi.org/10.1108/jedt-09-2018-0154.

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Purpose Road passenger transportation faces a global challenge of reducing environmental pollution and greenhouse gas emissions because of the vehicle weight increases needed to enhance passenger safety and comfort. This paper aims to present a preliminary mechanical design evaluation of the Wikispeed Car (with a focus on body bending, body torsion and body crash) to assess light-weighting implications and improve the vehicle’s environmental performance without compromising safety. Design/methodology/approach For this research, finite element analysis (FEA) was performed to examine the Wikispe

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Neupärtl, Nils, Fabian Tatai, and Constantin A. Rothkopf. "Intuitive physical reasoning about objects’ masses transfers to a visuomotor decision task consistent with Newtonian physics." PLOS Computational Biology 16, no. 10 (2020): e1007730. http://dx.doi.org/10.1371/journal.pcbi.1007730.

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While interacting with objects during every-day activities, e.g. when sliding a glass on a counter top, people obtain constant feedback whether they are acting in accordance with physical laws. However, classical research on intuitive physics has revealed that people’s judgements systematically deviate from predictions of Newtonian physics. Recent research has explained at least some of these deviations not as consequence of misconceptions about physics but instead as the consequence of the probabilistic interaction between inevitable perceptual uncertainties and prior beliefs. How intuitive p

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Pfau, A., J. Schlienger, D. Rusch, A. I. Kalfas, and R. S. Abhari. "Unsteady Flow Interactions Within the Inlet Cavity of a Turbine Rotor Tip Labyrinth Seal." Journal of Turbomachinery 127, no. 4 (2003): 679–88. http://dx.doi.org/10.1115/1.2008973.

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This paper focuses on the flow within the inlet cavity of a turbine rotor tip labyrinth seal of a two stage axial research turbine. Highly resolved, steady and unsteady three-dimensional flow data are presented. The probes used here are a miniature five-hole probe of 0.9 mm head diameter and the novel virtual four sensor fast response aerodynamic probe (FRAP) with a head diameter of 0.84mm. The cavity flow itself is not only a loss producing area due to mixing and vortex stretching, it also adversely affects the following rotor passage through the fluid that is spilled into the main flow. The

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Hamdy, Omar, Mohamed Hssan Hassan Abdelhafez, Mabrouk Touahmia, et al. "Simulation of Urban Areas Exposed to Hazardous Flash Flooding Scenarios in Hail City." Land 12, no. 2 (2023): 353. http://dx.doi.org/10.3390/land12020353.

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According to the United Nations (UN), an additional 1.35 billion people will live in cities by 2030. Well-planned measures are essential for reducing the risk of flash floods. Flash floods typically inflict more damage in densely populated areas. The province of Hail encompasses 120,000 square kilometers, or approximately 6% of the total land area of the Kingdom of Saudi Arabia. Due to its innate physiographic and geologic character, Hail city is susceptible to a wide variety of geo-environmental risks such as sand drifts, flash floods, and rock falls. The aim of this work is to evaluate the r

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Sissons, Helen, and Thomas Cochrane. "Introducing Immersive Reality into the Journalism Curriculum." Pacific Journal of Technology Enhanced Learning 2, no. 1 (2019): 7. http://dx.doi.org/10.24135/pjtel.v2i1.27.

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Abstract (sommario):

Following the introduction of the Google Cardboard virtual reality (VR) head mounted display (HMD) in 2014, mainstream journalism began exploring the potential of VR to transform news storytelling as an immersive experience (Lalwani, 2015; Somaiya, 2015). However, unlike the transformative impact of social media on journalism and journalism education (Mulrennan, 2017), VR has taken several years for this to filter into the curriculum of journalism higher education. AUT’s journalism programme includes a final semester, capstone, assessment in which students produce a piece of long-form immersiv

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Chardey, Elia Kodjo, Rosamaria Fastuca, Matteo Beretta, et al. "Digital Dynamic 3D Monitoring of Lower Incisors Intrusion in Lingual Orthodontics." Open Dentistry Journal 12, no. 1 (2018): 104–17. http://dx.doi.org/10.2174/1874210601812010104.

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Objective: The aim of the present study is to propose a 3-dimensional evaluation of lower intrusion obtained with lingual orthodontics considering not only the crowns but also dental roots. Methods: 9 adult patients underwent fixed lingual orthodontic treatment with i-TTя lingual brackets system for the correction of crowding in the lower arch associated with a deep overbite. Initial records, consisting of photos, CBCTs and intraoral scans were collected. Threshold segmentation of the CBCT was performed to generate a three-dimensional virtual model of each the teeth of the lower arch, superimp

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Rae Nelson, Cassidy, Joseph Conwell, Samuel Lally, et al. "Exploring Augmented Reality Triage Tools to Support Mass Casualty Incidents." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 66, no. 1 (2022): 1664–66. http://dx.doi.org/10.1177/1071181322661337.

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Abstract (sommario):

ARTTS is a head-worn Augmented Reality (AR) Triage Tool Suite containing an initial sorting tool, virtual assessment tool, and virtual triage tag to assist first responders in mass casualty incidents. The initial sorting tool prompts stunned responders through first-wave tasks to aid recalibration from shock to triage. The virtual assessment tool provides novice responders, potentially confused by the chaos, with a walkthrough of the SALT triage flowchart. Finally, current emergency medical triage processes leverage static paper tags susceptible to loss or illegible damage. ARTTS’ virtual tria

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Kattel, Parameshwari, Khim B. Khattri, and Shiva P. Pudasaini. "A multiphase virtual mass model for debris flow." International Journal of Non-Linear Mechanics 129 (March 2021): 103638. http://dx.doi.org/10.1016/j.ijnonlinmec.2020.103638.

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46

Esat, Ibrahim I., and Neviman Ozada. "Articular human joint modelling." Robotica 28, no. 2 (2009): 321–39. http://dx.doi.org/10.1017/s0263574709990592.

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Abstract (sommario):

SUMMARYThe work reported in this paper encapsulates the theories and algorithms developed to drive the core analysis modules of the software which has been developed to model a musculoskeletal structure of anatomic joints. Due to local bone surface and contact geometry based joint kinematics, newly developed algorithms make the proposed modeller different from currently available modellers. There are many modellers that are capable of modelling gross human body motion. Nevertheless, none of the available modellers offer complete elements of joint modelling. It appears that joint modelling is a

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47

González-Rojí, Santos J., Sheila Carreno-Madinabeitia, Jon Sáenz, and Gabriel Ibarra-Berastegi. "Changes in the simulation of atmospheric instability over the Iberian Peninsula due to the use of 3DVAR data assimilation." Hydrology and Earth System Sciences 25, no. 6 (2021): 3471–92. http://dx.doi.org/10.5194/hess-25-3471-2021.

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Abstract. The ability of two downscaling experiments to correctly simulate thermodynamic conditions over the Iberian Peninsula (IP) is compared in this paper. To do so, three parameters used to evaluate the unstable conditions in the atmosphere are evaluated: the total totals index (TT), convective available potential energy (CAPE), and convective inhibition (CIN). The Weather and Research Forecasting (WRF) model is used for the simulations. The N experiment is driven by ERA-Interim's initial and boundary conditions. The D experiment has the same configuration as N, but the 3DVAR data assimila

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48

Bernard, A. "Virtual engineering: Methods and tools." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 219, no. 5 (2005): 413–21. http://dx.doi.org/10.1243/095440505x32238.

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Abstract (sommario):

This paper presents an overview of actual approaches in virtual engineering, mainly from the design point of view. The evolution of the market has necessitated the reduction of time-to-market, essentially because the product life cycle is shorter, but also because it is very important to proceed more rapidly from an initial conception to a mass production object. As a result of newly evolved software DOI: environments, knowledge-based systems, and product data management, processes for integrated design and manufacturing for new products have emerged. Owing to this evolution of virtual enginee

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Xu, Wen, Yong Wang, Weimin Huang, and Yuping Duan. "An Efficient Nonlinear Mass-Spring Model for Anatomical Virtual Reality." IEEE Transactions on Instrumentation and Measurement 71 (2022): 1–10. http://dx.doi.org/10.1109/tim.2022.3164132.

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Wang, Yu, Shuxiang Guo, and Baofeng Gao. "Vascular elasticity determined mass-spring model for virtual reality simulators." International Journal of Mechatronics and Automation 5, no. 1 (2015): 1. http://dx.doi.org/10.1504/ijma.2015.068446.

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