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Letteratura scientifica selezionata sul tema "Virtual initial mass model"

Autore: Grafiati

Pubblicato: 25 gennaio 2025

Ultima modifica: 31 luglio 2025

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Articoli di riviste sul tema "Virtual initial mass model"

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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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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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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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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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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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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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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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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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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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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Più fonti

Tesi sul tema "Virtual initial mass model"

Dinh, Duy Cuong. "Development of a Detailed Approach to Model the Solid Pyrolysis with the Coupling Between Solid and Gases Intra-Pores Phenomena." Electronic Thesis or Diss., Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2024. http://www.theses.fr/2024ESMA0029.

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La pyrolyse du bois est un processus crucial dans la science de la sécurité incendie car elle affecte la décomposition thermique et le comportement de combustion des matériaux. Le bois est un composite biopolymères (cellulose, hémicellulose et lignine) qui subit une pyrolyse complexe, produisant du charbon solide, du goudron et des gaz. Le processus de pyrolyse modifie également certaines caractéristiques importantes de l’échantillon (densité, conductivité thermique, capacité thermique, porosité, perméabilité, émissivité...) qui évoluent tout au long de la réaction de décomposition. La compréh

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Johnson, Chad A. "The integration of CAD/CAM with virtual machining simulation and cost estimation." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177434959.

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Mor, Crespo Roger. "The star formation history and the stellar initial mass function of the Milky Way disc. The population synthesis Besançon Galaxy Model in the Gaia era." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667482.

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AIMS: We develop a new theoretical framework to generate Besançon Galaxy Model Fast Approximate Simulations (BGM FASt) to address fundamental questions of the Galactic structure and evolution performing multi-parameter inference. The flexibility of BGM FASt allows the inference of fundamental parameters related to the stellar initial mass function (IMF), the star formation history (SFH), the density distribution, the kinematics and the chemo-dynamics, among others. BGM FASt allows the study of different Milky Way (MW) components. In this thesis we are focused in a first application of our

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Савушкіна, Карина Костянтинівна. "Теоретико-методичні засади впровадження змішаного навчання в освітній процес закладу вищої освіти". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/4691.

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Савушкіна К. К. Теоретико-методичні засади впровадження змішаного навчання в освітній процес закладу вищої освіти : кваліфікаційна робота магістра спеціальності 011 «Освітні, педагогічні науки» / наук. керівник О. І. Гура. Запоріжжя : ЗНУ, 2020. 94 с.<br>UA : Робота викладена на 94 сторінках друкованого тексту. Перелік посилань включає 82 джерела, з них на іноземній мові – 24. Об’єкт дослідження: організація освітнього процесу закладу вищої освіти. Предмет дослідження: теоретико-методичні аспекти впровадження змішаного навчання в освітній процес закладу вищої освіти на прикладі моделі «перевер

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Libri sul tema "Virtual initial mass model"

Zydroń, Tymoteusz. Wpływ systemów korzeniowych wybranych gatunków drzew na przyrost wytrzymałości gruntu na ścinanie. Publishing House of the University of Agriculture in Krakow, 2019. http://dx.doi.org/10.15576/978-83-66602-46-5.

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The aim of the paper was to determine the influence of root systems of chosen tree species found in the Polish Flysch Carpathians on the increase of soil shear strength (root cohesion) in terms of slope stability. The paper's goal was achieved through comprehensive tests on root systems of eight relatively common in the Polish Flysch Carpathians tree species. The tests that were carried out included field work, laboratory work and analytical calculations. As part of the field work, the root area ratio (A IA) of the roots was determined using the method of profiling the walls of the trench at a

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Johansen, Bruce, and Adebowale Akande, eds. Nationalism: Past as Prologue. Nova Science Publishers, Inc., 2021. http://dx.doi.org/10.52305/aief3847.

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Nationalism: Past as Prologue began as a single volume being compiled by Ad Akande, a scholar from South Africa, who proposed it to me as co-author about two years ago. The original idea was to examine how the damaging roots of nationalism have been corroding political systems around the world, and creating dangerous obstacles for necessary international cooperation. Since I (Bruce E. Johansen) has written profusely about climate change (global warming, a.k.a. infrared forcing), I suggested a concerted effort in that direction. This is a worldwide existential threat that affects every living t

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Capitoli di libri sul tema "Virtual initial mass model"

Hilt, Simon, Charles Pontonnier, and Georges Dumont. "Model Based Compensation for Low Mass Objects Haptic Manipulation in Virtual Environments." In Virtual Reality and Augmented Reality. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-72323-5_6.

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Brötz, Nicolas, Manuel Rexer, and Peter F. Pelz. "Mastering Model Uncertainty by Transfer from Virtual to Real System." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77256-7_4.

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AbstractTwo chassis components were developed at the Technische Universität Darmstadt that are used to isolate the body and to reduce wheel load fluctuation.The frequency responses of the components were identified with a stochastic foot point excitation in a hardware-in-the-loop (HiL) simulation environment at the hydropulser. The modelling of the transmission behaviour influence of the testing machine on the frequency response was approximately represented with a time delay of $$10\,\mathrm {ms}$$ 10 ms in the frequency range up to $$25\,\mathrm {Hz}$$ 25 Hz . This is considered by a Padé ap

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Lin, Shenwen, Hongliang Mao, Zhen Wu, and Jinglin Yang. "Research on Bitcoin Anti-anonymity Technology Based on Behavior Vectors Mapping and Aligning Model." In Communications in Computer and Information Science. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-8285-9_10.

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AbstractTraditional anti-anonymity technologies for Bitcoin transactions include two types. One is network-layer anti-anonymity technology, which achieves the purpose of locating the initial IP of specific transaction information by speculating on the IP propagation path of transaction; the other is the anti-anonymity technology of the transaction layer. By analyzing the data of the Bitcoin ledger, it realizes the on-chain behavior portrait of a specific wallet address attributable to the user. In this work, we propose a new anti-anonymity technology, by constructing transaction behavior vecto

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Park, Minsoo, Seungsoo Lee, Woonggyu Choi, Yuntae Jeon, Dai Quoc Tran, and Seunghee Park. "Deep Learning-Based Pose Estimation for Identifying Potential Fall Hazards of Construction Worker." In CONVR 2023 - Proceedings of the 23rd International Conference on Construction Applications of Virtual Reality. Firenze University Press, 2023. http://dx.doi.org/10.36253/979-12-215-0289-3.62.

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Fall from height (FFH) is one of the major causes of injury and fatalities in construction industry. Deep learning-based computer vision for safety monitoring has gained attention due to its relatively lower initial cost compared to traditional sensing technologies. However, a single detection model that has been used in many related studies cannot consider various contexts at the construction site. In this paper, we propose a deep learning-based pose estimation approach for identifying potential fall hazards of construction workers. This approach can relatively increase the accuracy of estima

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Idrees, Sadia, Gianpaolo Vignali, and Simeon Gill. "Sustainable Mass-Customisation Business Model by Incorporating Virtual Fitting Room Marketing Tools in Fashion E-Commerce: A Study of the Luxury Unstitched Market." In Springer Texts in Business and Economics. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-33302-6_14.

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Dmytruk, Veronika, Bogdana Gayvas, Bogdan Markovych, Anatolii Dmytruk, and Yevhen Chaplya. "Drying of a porous layer in an external constant electric field (electroosmotic drying)." In DRYING PROCESSES: APPROACHES TO IMPROVE EFFICIENCY. TECHNOLOGY CENTER PC, 2025. https://doi.org/10.15587/978-617-8360-09-2.ch4.

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In this Chapter, mathematical modeling of the drying process of a porous layer under the influence of an external constant electric field is presented, taking into account the electroosmotic effects on mass and heat transfer. A mathematical model of electroosmotic drying is formulated based on the coupled equations of moisture transport, electrokinetic flow, and thermal effects. The analysis considers both natural and convective drying conditions, incorporating the impact of electroosmotic forces on moisture migration within the porous medium. In the study, the fundamental mechanisms governing

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He, Ben, Na Lv, and Ruilong Shi. "Design Optimization of Jacket Substructure of Offshore Wind Turbine." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_69.

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AbstractThe design optimization of the jacket substructure could reduce the cost of energy and the correlated carbon cost. The mass of jacket is optimized with respect to maximum stress and displacement responses. Wind and dead loads were applied at the top of the jacket referenced point. Wave load and foundation boundary were applied using Dload and UEL function in the Abaqus subroutine. Six different parameters were evaluated, including the pile height above mudline, the base width, brace thickness and diameter, and the main leg thickness and diameter. The parametrically optimized model has

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Xie, Hongping, Chao Han, Changqing Du, Bo Wang, Yuchi Zhang, and Pinqiang Mo. "Analysis of Pile-Soil Interaction of Precast Pile Driven in Coastal Strata." In Lecture Notes in Civil Engineering. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_43.

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AbstractIn order to further reveal the pile-soil interaction mechanism during precast pile driving in saturated soft soil in coastal areas, the compaction effect and excess pore pressure response of a single pile and adjacent pile penetration under hammer driven pile construction are analyzed by using the cavity expansion and model test method. The results show that pile driving in saturated soil layer will cause large soil compaction and accumulation of excess pore water pressure. Under the model test conditions, the variation range of soil pressure and excess pore pressure is about 0.7–3.0 t

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Zhang, Xueyan, Yixuan Zhang, Ye Yang, Chengcheng Deng, and Jun Yang. "Uncertainty Analysis and Sensitivity Evaluation of a Main Steam Line Break Accident on an Advanced PWR." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_30.

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AbstractA RELAP5 input model was established for a scaled-up facility simulating China's Advanced Passive Water Reactor with passive safety features. The simulation was performed to reproduce a Main Steam Line Break (MSLB) scenario at steam line connected to one Steam Generator. The figure of merit selected in this accident scenario includes the maximum containment pressure, mass and energy release to containment. Driving factors of this response function include Passive Residue Heat Removal material thermal conductivity, Pressurizer temperature, and broken steam line temperature.To achieve an

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Atti di convegni sul tema "Virtual initial mass model"

Li, Haoyang, Nanyan Shen, Jing Li, and Huanyu Yao. "Virtual Force Calculation Model Based on an Improved Mass-Spring-Damper Systems." In 2024 6th International Symposium on Robotics & Intelligent Manufacturing Technology (ISRIMT). IEEE, 2024. https://doi.org/10.1109/isrimt63979.2024.10875110.

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Chao, Fei, Wen Yang, Longze Li, Jinrong Qiu, and Jianqiang Shan. "Eigenvalue Analysis of Well-Posedness of Two-Fluid Single Pressure Model With Virtual Mass Force and Interfacial Pressure." In 2021 28th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/icone28-64434.

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Abstract It is well know that the two-fluid single pressure model is currently widely used to analyze reactor transient accidents such as LOCA. Current mainstream reactor safety analysis codes such as RALAP5 and CATHARE are based on this single pressure model. However this model has been proved to be ill posed in the sense that the equation system is non-hyperbolic which will lead to numerical unphysical oscillation. Currently reactor safety analysis codes use the interfacial pressure and virtual mass force to solve the ill-posed non-hyperbolicity issue. The development of China’s self-owned r

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Kiertkul, Suphawat, and Syed Mohd Halim Syed Nasir. "Virtual Sensor Development to Prevent Hydrate in Deepwater Gas Field." In International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-24621-ea.

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Abstract Sabah block H, located in 1,300 meters of water depth at offshore Sabah, comprises Buluh and Rotan fields. The subsea production system, i.e., trees, jumpers, manifold, umbilicals, risers and flowlines were installed and tied back to an FLNG facility. After Block H achieved 1st gas in Feb-2021, one temperature sensor at downstream of Rotan P3 Subsea XMT failed post 6 days of operation. Replacing the physical transmitter is not practical as it is integrated at an unretrievable part of XMT. A drilling rig is required to pull the upper completion assembly of the well before retrieving th

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Shieh, Meng-Dar, and Chih-Chieh Yang. "Designing Product Forms Using a Virtual Hand and Deformable Models." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99171.

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This paper presents a computer-aided conceptual design system for developing product forms. The system integrates a virtual hand, which is manipulated by the designer, with deformable models representing the product forms. Designers can use gestural input and full hand pointing in the system to discover potential new ways for product form design. In the field of industrial design, styling and ergonomics are two important factors that determine a successful product design. Traditionally, designers explore possible concepts by sketching their ideas and then using clay or foam mock-ups to test th

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Kim, Byung-joo, and Huei Peng. "Optimal Vehicle Motion Control to Mitigate Secondary Crashes After an Initial Impact." In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-6080.

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Typical drivers are not ready to react to unexpected collisions from other vehicles. The initial impact can startle the driver who then fails to maintain control. Since a loss of control leads to intense skidding and undesirable lateral motions, more severe subsequent events are likely to occur. To reduce the severity of possible subsequent (secondary) crashes, this paper considers both vehicle heading angle and lateral deviation from the original driving path. The research concept here is different from today’s electronic stability control systems in that it activates the differential braking

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Rubio, Erismar, and Nagaraju Reddicharla. "Enhanced Back Allocation Process Assisted by Real Time AI-Based Virtual Metering. Field Case Study in a Giant Field Project." In ADIPEC. SPE, 2023. http://dx.doi.org/10.2118/216936-ms.

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Abstract Artificial Intelligence (AI) is relatively new neurocomputational science employed in oil industry to solve wide spectrum of non-linear problems with high parallelism, fault and noise tolerance. AI seems very attractive for its remarkable capabilities of processing-correlating data and learning attributes. This paper briefs a successful implementation of an ecosystem between AI and physics-based models in a smart field, that support accurate well allocation process during the project start-up when testing facilities were not available. This case study is presented in a smart field dur

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Kumar, Dinesh, Hayuru Inoue, Masayuki Yamamoto, Prashant Khare, Teruyasu Kasahara, and Keita Hasegawa. "Application of Topology Optimization and Artificial Intelligence based Evolutionary Algorithm to Minimize the Contribution of the Caliper in Brake Squeal Noise." In Brake Colloquium & Exhibition - 42nd Annual. SAE International, 2024. http://dx.doi.org/10.4271/2024-01-3039.

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<div class="section abstract"><div class="htmlview paragraph">The squeal noise is one of the critical factors to qualify a disc brake design from the Noise Vibration and Harshness (NVH) perspective. It is imperative to be watchful of the unstable natural modes of the brake assembly which trigger squeal. Any design modification for reducing a part’s contribution to targeted squeal mode can adversely affect and give rise to new squeal modes. Also, controlling conflicting requirements like mass, strength, and casting manufacturability, further adds up complexity, which increases desig

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Hoyt, John G., Steven R. Turner, Herman J. Moeller, Scott A. Carpenter, and Miguel R. Quintero. "Operational Experience With The New Harold E. Saunders Maneuvering And Seakeeping (MASK) Basin Directional Wavemaker." In SNAME 30th American Towing Tank Conference. SNAME, 2017. http://dx.doi.org/10.5957/attc-2017-0033.

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The Naval Surface Warfare Center, Carderock Division replaced their 21 pneumatic type wavemaker domes with a 216-paddle directional wavemaker in the fall of 2013. This wavemaker is capable of producing regular waves at oblique angles to the wave banks as well as long crested and short crested irregular model seas. Another powerful capability of the new system is the ability to preview the commanded waves in 3D virtual space on the computer screen. The new directional wavemaker facility has been in operation for four years. Mixtures of capabilities exceeding the original requirements as well as

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Tanackov, I., J. Tepić, M. Kostelac, G. Stojić, and Z. Masal. "A virtual mass model in train aerodynamics." In COMPRAIL 2012. WIT Press, 2012. http://dx.doi.org/10.2495/cr120621.

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Tavakoli, Sasan, Abbas Dashtimanesh, and Prasanta Sahoo. "An Oblique 2D+T Approach for Hydrodynamic Modeling of Yawed Planing Boats in Calm Water." In SNAME Chesapeake Power Boat Symposium. SNAME, 2016. http://dx.doi.org/10.5957/cpbs-2016-015.

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Determination of forces acting on planing hulls in maneuvering has been turned into an interesting problem during the last decade. Different methods, based on mathematical or empirical approaches, are elicited in order to compute hydrodynamic forces and moments acting on the boat in different simplified conditions such as steady yawed or heeled conditions. Modeling of different conditions and combining them with each other may lead to initiate a final simulation model for 6DOF motion of planing boats in calm water. These simple modeling approaches, in the other word, can be considered as basic

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Rapporti di organizzazioni sul tema "Virtual initial mass model"

Davis, W. E., A. R. Olsen, B. T. Didier, P. E. Tucker, and D. W. Damschen. Surface footprint from initial Chernobyl release as indicated by the meso-alpha MLAM (Multi-Layer Air Mass) model. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/5129048.

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Ervin, Kelly, Karl Smink, Bryan Vu, and Jonathan Boone. Ship Simulator of the Future in virtual reality. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45502.

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The Army’s modernization priorities include the development of augmented reality and virtual reality (AR/VR) simulations for enabling the regiment and increasing soldier readiness. The use of AR/VR technology at the U.S. Army Engineer Research and Development Center (ERDC) is also growing in the realm of military and civil works program missions. The ERDC Coastal and Hydraulics Laboratory (CHL) has developed a ship simulator to evaluate bay channels across the world; however, the current simulator has little to no physical realism in nearshore coastal regions (Figure 1). Thus, the ERDC team is

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Madhavan, R., M. K. Yeh, S. Kyriakides, and C. D. Babcock. L41041 Pipe Collapse Under External Pressure and Axial Tension (PUPA) Computer Program Manual. Pipeline Research Council International, Inc. (PRCI), 1987. http://dx.doi.org/10.55274/r0011342.

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PUPA is a computer program which predicts the critical loads of a long tube under external pressure and axial tension. The program takes into account the effect of inelastic material behaviour on collapse and could be used for tubes with diameter to thickness ratio as low as 10. The analysis is based on a principle of virtual work type of formulation and the resulting nonlinear equilibrium equations are solved using Newton-Raphson method. The model implemented considers a long tube under generalized plane strain conditions and uniform ovalization. Effect of initial ovality, residual stresses a

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Jacobs, Timothy, and Jacob Hedrick. PR-457-14201-R03 Variable NG Composition Effects in LB 2S Compressor Engines - Prediction Enhancement. Pipeline Research Council International, Inc. (PRCI), 2017. http://dx.doi.org/10.55274/r0011406.

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Phase II of the project has focused on improving the initial analysis performed in the first phase by enhancing the various aspects of predictive combustion for lean burn spark ignition natural gas engines under variable composition fueling. These enhancements have incorporated validation data from a Cooper-Bessemer GMVH-10C3 engine located in New Jersey, which improves upon the lack of field data to bound the scope of composition variation. In simulation related endeavors, effort was made to improve the fundamental combustion physics related parameters, namely laminar flame speed, by developi

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Han, Yoonjung, Jeffrey Bullard, Jedadiah Burroughs, Mine Ucak-Astarlioglu, and Jameson Shannon. Extending CEMHYD3D to simulate hydration of portland cement pastes with high volumes of silica fume. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/49196.

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Silica fume (SF) influences the hydration rate of Portland cement in different ways depending on the physical and chemical properties of the SF. This study reports the impact of SiO2 content (%), loss on ignition (%), and Brunauer–Emmett–Teller (BET) specific surface area on the hydration reaction of SF-cement paste mixtures. This study used five types of SFs with varying SiO2 content, loss on ignition (%), and particle morphology. Five SFs were mixed with Class H oil well cement at each of two different replacement levels (20% or 30% by mass), and the released heat of hydration was measured u

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Pavlyuk, Ihor. MEDIACULTURE AS A NECESSARY FACTOR OF THE CONSERVATION, DEVELOPMENT AND TRANSFORMATION OF ETHNIC AND NATIONAL IDENTITY. Ivan Franko National University of Lviv, 2021. http://dx.doi.org/10.30970/vjo.2021.49.11071.

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The article deals with the mental-existential relationship between ethnoculture, national identity and media culture as a necessary factor for their preservation, transformation, on the example of national original algorithms, matrix models, taking into account global tendencies and Ukrainian archetypal-specific features in Ukraine. the media actively serve the domestic oligarchs in their information-virtual and real wars among themselves and the same expansive alien humanitarian acts by curtailing ethno-cultural programs-projects on national radio, on television, in the press, or offering the

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He, Rui, Na (Luna) Lu, and Jan Olek. Development of In-Situ Sensing Method for the Monitoring of Water-Cement (w/c) Values and the Effectiveness of Curing Concrete. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317377.

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As the most widely used construction material, concrete is very durable and can provide long service life without extensive maintenance. The strength and durability of concrete are primarily influenced by the initial water-cement ratio value (w/c), and the curing condition during the hardening process also influences its performance. The w/c value is defined as the total mass of free water that can be consumed by hydration divided by the total mass of cement and any additional pozzolanic material such as fly ash, slag, silica fume. Once placed, field concrete pavements are routinely cured with

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Bajwa, Abdullah, and Timothy Jacobs. PR-457-17201-R03 Residual Gas Fraction Estimation Based on Measured In-Cylinder Pressure - Phase III. Pipeline Research Council International, Inc. (PRCI), 2021. http://dx.doi.org/10.55274/r0011996.

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An experimental study was carried out to characterize the scavenging behavior of a cross-scavenged, piston-aspirated, two-stroke, natural gas engine to aid in the development of computationally inexpensive simple scavenging models for onboard engine control by (1) studying the effects of changing operational parameters on the engine's scavenging performance, and (2) identifying the underlying phenomena driving the observed effects. Tracer based methods were used to quantify the scavenging and trapping performance of the engine - CO2 was used as a tracer for combustion products and pre-mixed fu

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Eamer, J. B. R., C. Greaves, and E. L. King. The science questions underpinning the potential for offshore wind turbines on Atlantic Canada's continental shelves. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331697.

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Offshore wind farms typically host tens to hundreds of turbines that are individually sited on foundations or anchored if floating. These are connected by inter-farm cables which feed into one or more marine-based substations, further feeding one or more shore-connected high-voltage cables - all infrastructure that requires knowledge of water depth, metocean conditions, and seabed/subsurface geology. With this industry set to establish itself on the continental shelf of Atlantic Canada, knowledge of the geological conditions from the seabed to tens of metres below will be essential for farm la

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Drury, J., S. Arias, T. Au-Yeung, et al. Public behaviour in response to perceived hostile threats: an evidence base and guide for practitioners and policymakers. University of Sussex, 2023. http://dx.doi.org/10.20919/vjvt7448.

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Background: Public behaviour and the new hostile threats • Civil contingencies planning and preparedness for hostile threats requires accurate and up to date knowledge about how the public might behave in relation to such incidents. Inaccurate understandings of public behaviour can lead to dangerous and counterproductive practices and policies. • There is consistent evidence across both hostile threats and other kinds of emergencies and disasters that significant numbers of those affected give each other support, cooperate, and otherwise interact socially within the incident itself. • In emerg

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