Relevant bibliographies by topics / Velocity plan

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Velocity plan'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Velocity plan"

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Sciutti, Alessandra, Laurent Demougeot, Bastien Berret, et al. "Visual gravity influences arm movement planning." Journal of Neurophysiology 107, no. 12 (2012): 3433–45. http://dx.doi.org/10.1152/jn.00420.2011.

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When submitted to a visuomotor rotation, subjects show rapid adaptation of visually guided arm reaching movements, indicated by a progressive reduction in reaching errors. In this study, we wanted to make a step forward by investigating to what extent this adaptation also implies changes into the motor plan. Up to now, classical visuomotor rotation paradigms have been performed on the horizontal plane, where the reaching motor plan in general requires the same kinematics (i.e., straight path and symmetric velocity profile). To overcome this limitation, we considered vertical and horizontal mov
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Liu, Yan Bin, Qing Hua Ji, Xiao Chao Sun, and Jian Hai Han. "Kinematics and Trajectory Tracking Motion Plan of an Unmanned Bicycle." Advanced Materials Research 152-153 (October 2010): 341–45. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.341.

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Kinematics and ground plane trajectory tracking motion plan of an unmanned bicycle were researched in this paper. For the unmanned bicycle controlled by a steering torque, a pedaling toque and a tilting torque, rigorous kinematics model was set up and discussed, and when the ground plane trajectories and the bicycle tilting angular trajectory were given, by use of Back-stepping design means, the steering angular velocity, the rear wheel rotation angular velocity and the other motion parameters trajectories of the unmanned bicycle were planned and discussed, the simulation results showed that t
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Jiang, Zhanyuan, Jianquan Ge, Qiangqiang Xu, and Tao Yang. "Terminal Impact Time Control Cooperative Guidance Law for UAVs under Time-Varying Velocity." Drones 5, no. 3 (2021): 100. http://dx.doi.org/10.3390/drones5030100.

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Aiming at the problem that multiple Unmanned Aerial Vehicles (UAVs) attack the stationary target cooperatively under time-varying velocity, the cooperative guidance law with finite time convergence on two-dimensional plan and the three-dimensional cooperative guidance laws with impact time constraint are designed separately in this paper. Firstly, based on the relative motion equation between UAV and target on two-dimensional plane, the time cooperative guidance model of multiple UAVs is established. Then based on the consistency theory and graph theory, a distributed time cooperative guidance
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Asfour, Omar S. "EFFECT OF BUILDING PLAN FORM ON HUMAN THERMAL COMFORT IN NATURALLY VENTILATED OPEN-PLAN ENCLOSURES LOCATED IN HOT CLIMATES." Journal of Green Building 12, no. 2 (2017): 112–29. http://dx.doi.org/10.3992/1943-4618.12.2.112.

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This study aims to examine the effect of building plan form on internal thermal comfort conditions in naturally ventilated open-plan buildings located in hot climates. The study examined the square and the rectangular plan forms in relation to several values of wind direction, building plan depth, and climatic conditions. The study utilised CFD for ventilation prediction, DesignBuilder for thermal modelling, and the Tropical Summer Index (TSI) for thermal comfort assessment. These three tools were integrated in a quantitative approach to fulfil the study aim. The study concluded that the use o
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Socco, Laura Valentina, Cesare Comina, and Farbod Khosro Anjom. "Time-average velocity estimation through surface-wave analysis: Part 1 — S-wave velocity." GEOPHYSICS 82, no. 3 (2017): U49—U59. http://dx.doi.org/10.1190/geo2016-0367.1.

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In some areas, the estimation of static corrections for land seismic data is a critical step of the processing workflow. It often requires the execution of additional surveys and data analyses. Surface waves (SWs) in seismic records can be processed to extract local dispersion curves (DCs) that can be used to estimate near-surface S-wave velocity models. Here we focus on the direct estimation of time-average S-wave velocity models from SW DCs without the need to invert the data. Time-average velocity directly provides the value of one-way time, given a datum plan depth. The method requires the
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Cui, JiaXiang, and Ke Fang. "UAV Control With Terminal Velocity Vector Constraints." Journal of Physics: Conference Series 2832, no. 1 (2024): 012011. http://dx.doi.org/10.1088/1742-6596/2832/1/012011.

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Abstract The paper focuses on the UAV(Unmanned Aerial Vehicle) control strategy with terminal velocity vector constraints. Given the constraints on the position, velocity magnitude and velocity vector of points A and B, it uses a polynomial trajectory to plan a smooth continuous way that satisfies the constraints. To resolve the problem that the traditional cascade PID cannot control the position and velocity at the same time, it improves the cascade PID structure. Finally, a case study is provided to prove the algorithmic strategy. The result shows that, it satisfies the constraints on the te
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Wang, Dong Qing, En Rong Mao, and Xiu Jie Yin. "Research on Deviation Correction Control Technique of the Paver’s Traveling System." Advanced Materials Research 490-495 (March 2012): 1777–82. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1777.

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In order to improve the performance of crawler paver’s traveling and reduce the paver’s straight traveling deviation, a new control plan of paver’s traveling system was proposed. In the control plan, the left wheel control method adopted velocity closed loop control in order to keep constant-speed moving of the paver. The right wheel control method adopted the series structure of fuzzy control and PID control in which the fuzzy controller slightly adjusted the right wheel set point of PID controller according to the distance difference variable and velocity difference variable of paver’s left
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Ferreira, Elise, Morgan Dal, Christophe Colin, et al. "Experimental and Numerical Analysis of Gas/Powder Flow for Different LMD Nozzles." Metals 10, no. 5 (2020): 667. http://dx.doi.org/10.3390/met10050667.

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The Laser Metal Deposition (LMD) process is an additive manufacturing method, which generates 3D structures through the interaction of a laser beam and a gas/powder stream. The stream diameter, surface density and focal plan position affect the size, efficiency and regularity of the deposit tracks. Therefore, a precise knowledge of the gas/powder streams characteristics is essential to control the process and improve its reliability and reproducibly for industrial applications. This paper proposes multiple experimental techniques, such as gas pressure measurement, optical and weighting methods
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Wang, Rui, Changchun Liang, Dong Pan, Xiaodong Zhang, Pengfei Xin, and Xiaodong Du. "Research on a Visual Servo Method of a Manipulator Based on Velocity Feedforward." Space: Science & Technology 2021 (September 10, 2021): 1–8. http://dx.doi.org/10.34133/2021/9763179.

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In this paper, a method of predicting the motion state of a moving target in the base coordinate system by hand-eye vision and the position and attitude of the end is proposed. The predicted value is used as the velocity feedforward, and the position-based visual servo method is used to plan the velocity of the end of the manipulator. It overcomes the influence of end coordinate system motion on target prediction in a discrete system and introduces an integral control method to compensate for the prediction velocity, eliminating the end tracking error caused by target velocity prediction error
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Miller, Matthew A., Sandra E. Yuter, Nicole P. Hoban, Laura M. Tomkins, and Brian A. Colle. "Detecting wave features in Doppler radial velocity radar observations." Atmospheric Measurement Techniques 15, no. 6 (2022): 1689–702. http://dx.doi.org/10.5194/amt-15-1689-2022.

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Abstract. Mesoscale, wave-like perturbations in horizontal air motions in the troposphere (velocity waves) are associated with vertical velocity, temperature, and pressure perturbations that can initiate or enhance precipitation within clouds. The ability to detect velocity waves from horizontal wind information is an important tool for atmospheric research and weather forecasting. This paper presents a method to routinely detect velocity waves using Doppler radial velocity data from a scanning weather radar. The method utilizes the difference field between consecutive position plan indicator
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Dissertations / Theses on the topic "Velocity plan"

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Fouari, Aziz. "Contribution à l'étude de la diffusion de la chaleur en aval d'une source linéaire placée dans un jet plan turbulent." Rouen, 1986. http://www.theses.fr/1986ROUES013.

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Etude expérimentale du champ de vitesse moyenne et des fluctuations de vitesse, des champs de température moyenne et de fluctuations de température. Comparaison avec d'autres écoulements turbulents (couche limite turbulente, turbulence de grille, écoulement de conduite). Modèle physique basé sur le comportement relatif du sillage instantané et du sillage moyen décrivant les deux zones du processus de diffusion dans le cas de la couche limite turbulente et le jet plan turbulent
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Ступак, Олександр Юрійович. "Кінематичний аналіз плоского важільного механізму програмними засобами(робота)". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/29553.

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У наш час завдання кінематичного аналізу механізмів найчастіше вирішуються графічними або аналітичними методами. З розвитком мов програмування та можливостей відповідних середовищ розробки стає можливою реалізація кінематичного аналізу плоских важільних механізмів програмними методами. Запропонована реалізація являється комбінованим графоаналітичним методом, оскільки аналітичне рішення засноване на графічних побудовах та рішенні відповідних геометричних задач. За допомогою мови програмування Processing реалізовано програмне забезпечення для кінематичного аналізу простих важільних механізмів. К
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Cabrera, Gomez Jose Julian. "Velocity-dip analysis in the plane-wave domain." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30604.

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Plane-wave decomposition and slant stack transformation have recently gained much interest as viable routes to perform a variety of prestack processing tasks, such as velocity estimation, migration, filtering, deconvolution, and velocity inversion. To further complement the current advances, the problem of earth model parameter estimation and prestack structural imaging are addressed in this work. Unlike existing methods, the algorithms presented here make a novel and systematic use of the plane-wave domain to determine migration and interval velocities, interface dip angles and common-shot ga
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Collins, Justin Andrew. "Velocity and free surface measurements of free plane jets." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17888.

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Windholtz, Timothy Nolan. "Plane-Strain Formability of Sheet Metal at High Velocity." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1332509672.

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Buono, Jared. "Assessing the Ecohydrologic Consequences of Woody Plant Encroachment." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195347.

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This three part study attempted to enhance our understanding of vegetation change and its potential effects on ecohydrology in drylands. The first study developed a method to measure the velocity of shallow overland flow. Under rainfall simulation, dye tracers were applied to runoff and photographed to calculate mean surface velocity. Results showed this approach was a significant improvement explaining 13% more of the variation in mean velocity compared to traditional methods. Results from the first study were used to compare hydraulic parameters on shrub- and grass-dominated plots in the se
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Jiao, Junru. "Residual migration velocity analysis in the plane wave domain : theory and applications /." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3023551.

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Styles, Julie M. "A wind tunnel study of the velocity field above a model plant canopy." [Canberra] : CSIRO Land and Water, 1997. http://nla.gov.au/nla.arc-13482.

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Thesis (B.Sc. (Honours)) - Australian National University, 1997.<br>Title from title screen (viewed on May 20, 2002). "A thesis submitted in partial fulfilment of the requirements for the Degree of Bachelor of Science (Honours)"--Title screen. Bibliography: p. 64-66. Available full text via the internet.
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Salamanca, Gabriel Enrique Dicelis. "Estudo integrado da camada de basalto em Bebedouro - SP, Bacia do Paraná: relocalização dos sismos induzidos por poços tubulares." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-10082011-215956/.

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Dicelis, G. E., Estudo Integrado da Camada de Basalto em Bebedouro SP, Bacia do Paraná: Relocalização dos sismos induzidos por poços tubulares, 2011. Dissertação de Mestrado Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, SP. A partir de 2004, a população do distrito de Andes, Bebedouro (SP), passou a sentir pequenos tremores de terra. Uma rede sismográfica instalada em 2005 mostrou que os sismos locais são induzidos por poços tubulares profundos usados para irrigação de lavouras (Assumpção et al., 2007). Neste projeto de pesquisa foi melhorada a locali
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Harsha, Senusi Mohamed. "Interpretation of Southern Georgia coastal plain velocity structure using refraction and wide-angle reflection methods." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/25886.

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Books on the topic "Velocity plan"

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Bosch, Frank van den. The velocity of spatial population expansion. F. van den Bosch, 1990.

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Hollinrake, P. G. Flood discharge assessment: Peak velocity meter - evaluation of a device for measuring flood plain flow velocity : progress to March 1991 . Hydraulics Research, 1991.

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Institute for Computer Applications in Science and Engineering., ed. On absorbing boundary conditions for linearized Euler equations by a perfectly matched layer. Institute for Computer Applications in Science and Engineering, NASA Langley Research Center, 1995.

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Husain, Zoeb. Basic fluid mechanics and hydraulic machines. BS Publications, 2008.

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Moore, Geoffrey A. Escape Velocity: Free Your Company's Future from the Tyranny of Last Year's Operating Plan. HarperCollins Publishers, 2011.

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Huffaker, Ray, Marco Bittelli, and Rodolfo Rosa. Phase Space Reconstruction. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198782933.003.0003.

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In this chapter we introduce an important concept concerning the study of both discrete and continuous dynamical systems, the concept of phase space or “state space”. It is an abstract mathematical construction with important applications in statistical mechanics, to represent the time evolution of a dynamical system in geometric shape. This space has as many dimensions as the number of variables needed to define the instantaneous state of the system. For instance, the state of a material point moving on a straight line is defined by its position and velocity at each instant, so that the phase
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Lulgjuraj, K. M. Equation for Trajectory, Force of Impact, Breaking the Plane Limit, and Velocity. Independently Published, 2019.

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Cameli, Matteo, Partho Sengupta, and Thor Edvardsen. Deformation echocardiography. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198726012.003.0004.

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Echocardiographic strain imaging, also known as deformation imaging, has been developed as a means to objectively quantify regional and global myocardial function. First introduced as a post-processing feature of tissue Doppler imaging velocity converted to strain and strain rate, strain imaging has more recently also been derived from speckle tracking analysis. Tissue Doppler imaging yields velocity information from which strain and strain rate are mathematically derived whereas two-dimensional speckle tracking yields strain information from which strain rate and velocity data are derived. Da
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Velocity and stage data collected in a laboratory flume for water-surface slope determination using a pipe manometer. U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Yaghi, Obada. Flow and Mixing Optimization of an Existing Biogas Plant Through CFD Simulation and Velocity Measurements Prepared. GRIN Verlag GmbH, 2019.

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Book chapters on the topic "Velocity plan"

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Spellman, Frank R. "Force, Pressure, Head, Velocity Calculations." In Mathematics Manual for Water and Wastewater Treatment Plant Operators, 3rd ed. CRC Press, 2023. http://dx.doi.org/10.1201/9781003354291-12.

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Spellman, Frank R. "Flow, Velocity, and Pumping Calculations." In Mathematics Manual for Water and Wastewater Treatment Plant Operators: Wastewater Treatment Operations, 3rd ed. CRC Press, 2023. http://dx.doi.org/10.1201/9781003354314-1.

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Dong, Xing, Chenhao Guo, Jifeng Chen, and Haorong Song. "Research of the Flow Field Characteristics of Flake Graphite in the Fan Shaped Nozzle of Premixed Water Jet." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1876-4_76.

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AbstractGraphite is an important strategic resource, in order to explore the flow performance of flake graphite in the flow field of the premixed water jet fan nozzle, numerical simulation of nozzle flow field was carried out by FLUENT software. According to the jet characteristics, the Euler model is selected to simulate the two-phase flow law of water and flake graphite, and standard k-ε turbulence model is selected as the turbulence model, the influence of different inlet pressure on the flow field distribution of flake graphite was analyzed. The results show that the axial velocity distrib
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Deville, Michel O. "Plane Irrotational Flows of Perfect Fluid." In An Introduction to the Mechanics of Incompressible Fluids. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04683-4_6.

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AbstractThis chapter treats the theory of irrotational flows of perfect fluids by the use of complex variables. The theory is based on a complex velocity and the related concepts like circulation, flow rate, complex potential. Several simple examples are given. More elaborated is the flow around a circular cylinder with and without circulation . Using conformal mapping and especially the Joukowski transformation, it is possible to consider an aerodynamics application, namely the flow around an airfoil. Blasius theorem allows for the computation of the forces and moment generated by the flow ar
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Tygel, M., and P. Hubral. "Constant Velocity Migration in the Various Guises of Plane-Wave Theory." In Aspects of Seismic Reflection Data Processing. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2087-3_6.

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Bousmar, Didier, Catherine Swartenbroekx, Geoffrey Pierard, and Emmanuel Van Hees. "Optimizing Upstream Approach Wall to Navigation Lock in Narrow Rivers." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_47.

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AbstractIn canalized rivers, navigation locks are often located aside a weir. River currents are concentrated towards the weir. As a result, vessels face transverse currents and significant outdraft forces when approaching the lock. An approach wall can be designed to isolate the final lock approach from the weir flow. This wall can be a plain wall, or a perforated wall. Depending on the design of the wall openings, the flow velocity gradient and the outdraft forces are translated upstream at the entrance of the port. At this location, the vessel keeps a larger velocity and can manoeuvre more
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Tan, Chuheng, and Ximing Zhong. "A Rapid Wind Velocity Prediction Method in Built Environment Based on CycleGAN Model." In Computational Design and Robotic Fabrication. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8637-6_22.

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AbstractAlthough the wind microclimate and wind environment play important roles in urban prediction, the time-consuming and complicated setup and process of wind simulation are widely regarded as challenges. There are several methods to use deep learning (DL) models for wind speed prediction by labeling pairs of wind simulation dataset samples. However, many wind simulation experiments are needed to obtain paired datasets, which is still time-consuming and cumbersome. Compared with previous studies, we propose a method to train a DL model without labelling paired data, which is based on Cycle
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Niroshinie, M. A. C., Nobuyuki Ono, Yasuyuki Shimizu, and Kazuya Egami. "Flow Analysis for Navigation Safety by Using iRIC Model Nays2DH." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_76.

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AbstractFor safer navigation, it is important to reduce the shallow water effects and reduce the possibility of sedimentation. The shallow water effect is a vital factor in confluence areas where the depth of the navigation routes is subject to frequent changes during high flow and low flow times. This study summarizes the flow analysis during the process of improving the navigation channel around a confluence area by excavating shallow areas up to two possible bed elevation levels (3.3 OPm and 2.8 OPm). The analysis results, demonstrated that the depth has increased and the velocity has decre
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Wang, Fei, Yong Li, Zhibing Zhu, and Haolin Jing. "Numerical Analysis of Oil Flow Characteristics in Curved Pipes of Aero-Engine Lubrication System." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-7887-4_66.

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Abstract As an essential component connecting various parts of the lubrication system in areo-engine, the internal flow characteristics of the curved pipe play a vital role in the normal operation of areo-engine. In this paper, a geometric and mesh model of oil flow in the curved pipe are established, and the flow characteristics of oil in the curved pipe are numerically calculated using the Detached Eddy Simulation (DES) model. The influence of curved pipe angle and inlet oil velocity on the oil flow in the curved pipe is discussed separately. The results show as follows: (1) The curved pipe
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Hudson, Michael J. "Density and Peculiar Velocity Fields in the Region of Dressler’s Supergalactic Plane Survey." In Observational Tests of Cosmological Inflation. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3510-8_54.

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Conference papers on the topic "Velocity plan"

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Domogala, David J., John A. Buffa, and David P. Nesbitt. "A Case History for the Mitigation of Salt Water Intrusion into a Boiler Steam Cycle." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00435.

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Abstract On May 22, 1998, Bridgeport Harbor Station Unit No. 3 operated for nearly four (4) hours with saltwater intrusion into the boiler water and steam systems via a condenser tube leak. After deliberate and detailed study with world-renown corrosion inspection and mitigation experts and EPRI, a plan of action was developed to mitigate the salt water intrusion from the boiler waterwall and steam system, in order to place these portions of the unit in a “before incident” condition. The boiler waterwall system was thoroughly recirculated and flushed with condensate, and then chemically cleane
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Kulemann, Dennis, and Steffen Schön. "Contributions to Velocity Integrity for Autonomous Navigation in Urban Environments." In 2025 IEEE/ION Position, Location and Navigation Symposium (PLANS). IEEE, 2025. https://doi.org/10.1109/plans61210.2025.11028388.

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Al-Abbas, Faisal M., Qasim Saleem, Bander Al-Otaibi, Balasubramani Bakthavatchalu, and Ebadul Haque. "Extending the Life of an Ageing 42 Year Old Offshore Wet Crude Oil Pipeline." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17532.

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ABSTRACT This paper presents the approach used for performing life extension of an aging forty two years offshore pipeline thereby providing necessary assurance for safe and continued operation. Offshore pipeline systems are susceptible to a number of damage mechanisms including but not limited to internal corrosion, external corrosion, concrete weight coat damage, excessive free spans, loss of supports and structural (third party) damage. The life extension approach identified the relevant damage mechanisms, internal corrosion modeling and evaluated the current integrity status of the offshor
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Ramasamy, Manikandan, James Heineck, Cloria Yamauchi, Edward Schairer, and Thomas Norman. "Comprehensive Aerodynamic Analysis of PIV Measurements in the NFAC 80- by 120-ft Test Section Towards Understanding HVAB Hovering Rotor Characteristics." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1351.

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Stereoscopic particle image velocimtery (PIV) was used to characterize a hovering rotor wake at four collective pitch settings in the world's largest wind tunnel test section. The PIV measurements are a subset of a comprehensive dataset acquired during the hover test of the HVAB rotor. Substantial effort was made to cross-validate PIV results with other test measurements and fluid mechanic theories to ensure accuracy in the reported HVAB dataset. Blade coning and flap bending were validated against early tip vortex locations. Tip vortex trajectory was compared against shadowgraphy results and
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Percival, Jeffrey W., Jayadev Rajagopal, Samuel Halverson, et al. "The NEID precision radial velocity spectrometer: port adapter overview, requirements, and test plan." In Ground-based and Airborne Instrumentation for Astronomy VII, edited by Hideki Takami, Christopher J. Evans, and Luc Simard. SPIE, 2018. http://dx.doi.org/10.1117/12.2312209.

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Daramouskas, Ioannis, Niki Patrinopoulou, Dimitrios Meimetis, Vaios Lappas, and Vassilios Kostopoulos. "A Decentralized Collision Avoidance System using Velocity Obstacle Principles." In Emerging Tech Conference Edge Intelligence 2022. Hellenic Emerging Technology Industry Association, 2025. https://doi.org/10.63438/jbpw7850.

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Drones and unmanned aerial vehicles (UAVs) have piqued the interest of researchers during the last decade, owing to their capabilities and potential for usage in a wide range of applications and areas. One of the most critical functions that drones must execute efficiently is navigation in real-world surroundings. This often involves the capacity to plan their path and avoid collisions. It is critical that drones can conduct processes related to collision avoidance while navigating around independently and effectively. In this work, we present a decentralized system for drones aiming to naviga
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Yang, Hui, Li Jia, and Lixin Yang. "Effect of Initial Velocity Field on Smoke Diffusion Characteristic in Subway Tunnel." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88439.

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In this paper, piston wind effect on smoke diffusion characteristic in subway tunnel is studied by using three-dimensional transient computational fluid dynamics (CFD) method. In the first simulation case, fire disaster is simulated with homogeneous resting initial field condition. In the second simulation case, the train’s decelerating process till stopping in the tunnel is simulated for getting three-dimensional tunnel air velocity field distribution. Then the final heterogeneous air velocity field when the train stops in the tunnel is taken as initial field condition and the same fire scena
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Grant, Howard, Walter Stubner, Walter Alwang, Charles Henry, John Baird, and Paul Spens. "Schooner Brilliant Sail Coefficients and Speed Polars." In SNAME 15th Chesapeake Sailing Yacht Symposium. SNAME, 2001. http://dx.doi.org/10.5957/csys-2001-011.

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The sail coefficients for a schooner rig, as a function of wind angle and heel angle, are presented, based on an experimental program, for historic vessel research, at Mystic Seaport, using the 61'6" schooner Brilliant. The coefficients were determined by full-scale sailing tests and 9- scale model tow-tank tests. Sail coefficients CR and Cttare defined as the drive force and horizontal side force , due to the sails, rigging, and hull above the waterline, per unit of sail area, per unit of wind pressure. These coefficients can be used to study performance of historic schooner­rigged vessels, p
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Romanchenko, M. I. "DRAWING UP THE POWER BALANCE FOR THE DRIVING WHEEL OF THE CAR USING THE SPEED PLAN." In Innovative technologies in road transport. Voronezh State University of Forestry and Technologies named after G.F. Morozov, Voronezh, Russia, 2021. http://dx.doi.org/10.34220/itrt2021_38-44.

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The method of drawing up the power balance for the driving wheel of a car using the speed plan of individual points of the wheel is presented. The linear velocities of the characteristic points are determined by their components, taking into account three wheel radii – dynamic and two kinematic. The kinematic radii are represented by the rolling radius of the wheel in the free mode and the rolling radius of the wheel in the driving mode. As a result, the linear velocities are reduced to two components, depending on the kinematic radii and the angular velocity of the wheel. They allow you to de
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Lowe, Kevin T., Gwibo Byun, Sean Shea, Matthew T. Boyda, and Courtney S. Winski. "Three-Velocity-Component Cross-Correlation Doppler Global Velocimetry for the Space Launch System Booster Separation Test in the NASA Langley Unitary Plan Wind Tunnel." In AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-2312.

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Reports on the topic "Velocity plan"

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Aagaard, B. T., R. W. Graymer, C. H. Thurber, et al. Science Plan for Improving 3-D Seismic Velocity Models in the San Francisco Bay Region, 2019-24. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1569674.

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Hart, Carl, and Gregory Lyons. A tutorial on the rapid distortion theory model for unidirectional, plane shearing of homogeneous turbulence. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/44766.

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The theory of near-surface atmospheric wind noise is largely predicated on assuming turbulence is homogeneous and isotropic. For high turbulent wavenumbers, this is a fairly reasonable approximation, though it can introduce non-negligible errors in shear flows. Recent near-surface measurements of atmospheric turbulence suggest that anisotropic turbulence can be adequately modeled by rapid-distortion theory (RDT), which can serve as a natural extension of wind noise theory. Here, a solution for the RDT equations of unidirectional plane shearing of homogeneous turbulence is reproduced. It is ass
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Ziegler, Nancy, Nicholas Webb, John Gillies, et al. Plant phenology drives seasonal changes in shear stress partitioning in a semi-arid rangeland. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47680.

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Accurate representation of surface roughness in predictive models of aeolian sediment transport and dust emission is required for model accuracy. While past studies have examined roughness effects on drag partitioning, the spatial and temporal variability of surface shear velocity and the shear stress ratio remain poorly described. Here, we use a four-month dataset of total shear velocity (u*) and soil surface shear velocity (us*) measurements to examine the spatiotemporal variability of the shear stress ratio (R) before, during, and after vegetation green-up at a honey mesquite (Prosopis glan
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Liu, D. D. S. Estimation of superficial gas velocity in a pilot plant operation. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/302658.

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Weeks, Timothy "Dash." DTPH56-13-X-000013 Modern High-Toughness Steels for Fracture Propagation and Arrest Assessment-Phase II. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0012037.

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NIST work developed processes to identify the stress/strain/crack velocity conditions for unstable high-rate ductile crack propagation found in a full-scale pipeline burst test and duplicate those conditions in a medium-scale test. With modeling to validate conditions and assumptions used in reducing the scale of the tests. A medium-scale test to elucidate material property data necessary to qualify high-strength high-toughness steels based on the correlation to large-scale tests. Parametric determination of the material properties governing fracture propagation or arrest-ability was developed
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Rohay, Alan C., and Thomas M. Brouns. Site-Specific Velocity and Density Model for the Waste Treatment Plant, Hanford, Washington. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/912736.

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Loucks, Richard B. An Experimental Examination of the Streamwise Velocity in a Plane Mixing Layer using a Single Hot-Wire Sensor. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada332948.

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Liu, D. D. S. Analysis of data obtained from the CANMET hydrocracking demonstration plant test - April 29 to May 12, 1986: void fraction versus superficial gas velocity. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/302629.

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Brodsky, N. S. Crack closure and healing studies in WIPP (Waste Isolation Pilot Plant) salt using compressional wave velocity and attenuation measurements: Test methods and results. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6197248.

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Hart, Carl. Vibration survey of Room 47 with a laser doppler vibrometer : Main Laboratory Basement, U.S. Army ERDC-CRREL. Engineer Research and Development Center (U.S.), 2020. http://dx.doi.org/10.21079/11681/38919.

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Plans are underway to create an acousto-optic laboratory on the campus of the Cold Regions Research and Engineering Laboratory. For this purpose, existing space in the basement of the Main Laboratory will be renovated. Demanding measurement techniques, such as interferometry, require a sufficiently quiet vibration environment (i.e., low vibration levels). As such, characterization of existing vibration conditions is necessary to determine vibration isolation requirements so that highly sensitive measurement activities are feasible. To this end, existing vibro-acoustic conditions were briefly s
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