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Journal articles on the topic 'Velocity plan'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

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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2

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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4

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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6

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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9

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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10

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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11

Gopal, Atul, Sumitash Jana, and Aditya Murthy. "Contrasting speed-accuracy tradeoffs for eye and hand movements reveal the optimal nature of saccade kinematics." Journal of Neurophysiology 118, no. 3 (2017): 1664–76. http://dx.doi.org/10.1152/jn.00329.2017.

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In contrast to hand movements, the existence of a neural representation of saccade kinematics is unclear. Saccade kinematics is typically thought to be specified by motor error/desired displacement and generated by brain stem circuits that are not penetrable to voluntary control. We studied the influence of instructed hand movement velocity on the kinematics of saccades executed without explicit instructions. When the hand movement was slow the saccade velocity decreased, independent of saccade amplitude. We leveraged this modulation of saccade velocity to study the optimality of saccades (in

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12

Yang, Lu Jiang, De Wen Liu, Zhong Li Guo, Jing Li, and Bi Hui Dai. "Engineering Mechanics in High-Rise Building with Irregular Planner." Applied Mechanics and Materials 540 (April 2014): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amm.540.193.

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Plane functional layout and total controlling plan of the general plan in the building always are abnormal. Furthermore the floor size and horizontal stiffness in the same floor are different tremendously, otherwise there are many dislocation floor in the same floor, according to different function in the same floor. Irregular plane in the building may happen according to the situation above. It is harmful to the force,, displacement and deformation in irregular plane. In order to research the essence of the irregular plane and avoid it, firstly the irregular plane is introduced, also we have

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13

Diffee, G. M., V. J. Caiozzo, R. E. Herrick, and K. M. Baldwin. "Contractile and biochemical properties of rat soleus and plantaris after hindlimb suspension." American Journal of Physiology-Cell Physiology 260, no. 3 (1991): C528—C534. http://dx.doi.org/10.1152/ajpcell.1991.260.3.c528.

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This study examined the relationship between contractile and isomyosin changes occurring in rat soleus (SOL) and plantaris (PLAN) muscles after 28 days of hindlimb suspension. SOL muscles from suspended animals exhibited a 45% decline in muscle weight compared with controls (P less than 0.05) accompanied by a 49% decrease in peak twitch tension (Pt) and a 59% reduction in peak tetanic tension (Po). Smaller reductions were observed in muscle weight, Pt, and Po (12, 43, and 24%, respectively) for the suspended PLAN. Maximal shortening velocity (Vmax) of the suspended SOL and the velocity of unlo

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14

Eden, D. J., T. J. T. Moore, M. J. Currie, et al. "CHIMPS2: survey description and 12CO emission in the Galactic Centre." Monthly Notices of the Royal Astronomical Society 498, no. 4 (2020): 5936–51. http://dx.doi.org/10.1093/mnras/staa2734.

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ABSTRACT The latest generation of Galactic Plane surveys is enhancing our ability to study the effects of galactic environment upon the process of star formation. We present the first data from CO Heterodyne Inner Milky Way Plane Survey 2 (CHIMPS2). CHIMPS2 is a survey that will observe the Inner Galaxy, the Central Molecular Zone (CMZ), and a section of the Outer Galaxy in 12CO, 13CO, and C18O $(J = 3\rightarrow 2)$ emission with the Heterodyne Array Receiver Program on the James Clerk Maxwell Telescope (JCMT). The first CHIMPS2 data presented here are a first look towards the CMZ in 12CO J =

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15

Shaffick, Brendan. "A Theoretical Training Plan and Facility for Ontario-Based Olympic Weightlifters." American Journal of Recreation and Sports 2, no. 1 (2023): 1–28. http://dx.doi.org/10.47672/ajrs.1450.

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Olympic Weightlifting is a sport where athletes of different weight classes utilize either the Snatch or Clean and Jerk (CJ) technique to lift the heaviest load overhead. This case study describes the training program for a team of Senior (age; 18-35 years) Olympic weightlifters during a normal competitive season. The team of Olympic weightlifters will be participating in team training 3 to 4 times a week; however, variations will occur on the training schedule for each individual athlete based on the on-going testing results. Each athlete will also participate in an additional day of training

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16

Valentina Socco, Laura, and Cesare Comina. "Time-average velocity estimation through surface-wave analysis: Part 2 — P-wave velocity." GEOPHYSICS 82, no. 3 (2017): U61—U73. http://dx.doi.org/10.1190/geo2016-0368.1.

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Surface waves (SWs) in seismic records can be used to extract local dispersion curves (DCs) along a seismic line. These curves can be used to estimate near-surface S-wave velocity models. If the velocity models are used to compute S-wave static corrections, the required information consists of S-wave time-average velocities that define the one-way time for a given datum plan depth. However, given the wider use of P-wave reflection seismic with respect to S-wave surveys, the estimate of P-wave time-average velocity would be more useful. We therefore focus on the possibility of also extracting t

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17

Wu, Nengkai, Dongyao Jia, Ziqi Li, and Zihao He. "Trajectory Planning of Robotic Arm Based on Particle Swarm Optimization Algorithm." Applied Sciences 14, no. 18 (2024): 8234. http://dx.doi.org/10.3390/app14188234.

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Achieving vibration-free smooth motion of industrial robotic arms in a short period is an important research topic. Existing path planning algorithms often sacrifice smoothness in pursuit of efficient motion. A robotic trajectory planning particle swarm optimization algorithm (RTPPSO) is introduced for optimizing joint angles or paths of mechanical arm movements. The RTPPSO algorithm is enhanced through the introduction of adaptive weight strategies and random perturbation terms. Subsequently, the RTPPSO algorithm is utilized to plan selected parameters of an S-shaped velocity profile, iterati

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18

Chen, Shengtao, Yuhan Zhang, Tianyu Su, and Yongjun Gong. "PIV Experimental Research and Numerical Simulation of the Pigging Process." Journal of Marine Science and Engineering 12, no. 4 (2024): 549. http://dx.doi.org/10.3390/jmse12040549.

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The initial running speed of the pig during gas–liquid two-phase pipeline pigging can significantly influence the velocities of both gas and liquid phases within the pipeline. However, due to the complexity and limited understanding of these velocity variations, developing an effective operational plan for pigging becomes challenging. To enhance pigging efficiency and effectively seal the pig, it is crucial to monitor the velocity variations in the gas–liquid phase within the pipeline. In this study, an experimental platform was established to facilitate precise observation of these variations

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19

Burns, R. A., T. W. Fahringer, Jr., and P. M. Danehy. "Hybrid Pulse-Burst / Cross-Correlation DGV For High-Speed Flow Measurements At 100 KHz." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 20 (July 11, 2022): 1–20. http://dx.doi.org/10.55037/lxlaser.20th.26.

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Hybrid pulse-burst Doppler global velocimetry (PB-DGV)/pulse-burst, cross-correlation DGV (PB-CC-DGV) was demonstrated for the first time in the NASA Langley 4-foot Supersonic Unitary Plan Wind Tunnel, allowing simultaneous acquisition of mean and instantaneous high-repetition-rate velocity fields. The technique was used to make planar velocity measurements across an oblique shockwave generated by a large splitter plate set at a -2° angle of attack in a Mach 2.4 flow. Sequences of >100 consecutive instantaneous velocity images were obtained at a rate of 100 kHz. Velocity fields from both as

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20

Wang, Lan, Lingjie Lin, Ying Chang, and Da Song. "Velocity Planning for Astronaut Virtual Training Robot with High-Order Dynamic Constraints." Robotica 38, no. 12 (2020): 2121–37. http://dx.doi.org/10.1017/s0263574719001863.

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SUMMARYIn order to improve the training efficiency and establish a multi-person cooperative training simulation system, including “virtual human,” in the process of virtual reality-based astronaut training, it is necessary to plan the velocity at which astronauts carry the target object. A velocity planning algorithm, combining a traditional six-stage acceleration/deceleration algorithm, based on a time-discrete model with high-order dynamic constraints, considering the elastic damping torque of the space suit, is proposed. The described algorithm is verified on MATLAB to prove its feasibility

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21

Ichkova, Mariana. "Influence of diamond burnishing governing factors on the surface microhardness of austenitic stainless steels." Journal of the Technical University of Gabrovo 70 (July 10, 2025): 35–40. https://doi.org/10.62853/wrdv8518.

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Diamond burnishing (DB) is an effective finishing that dramatically improves the performance of metal components due to the favorable combination of surface integrity characteristics. A comprehensive study of the effects of DB governing factors of AISI 304 steel specimens on the microhardness was conducted using an optimal second-order composition plan, ANOVA and regression analysis. Mathematical model of the surface microhardness depending on the burnishing force, feed rate and burnishing velocity was obtained. Based on the results obtained, it was found that the combination of high burnishin

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Li, Yuting, Zhiyao Song, Guoqiang Peng, et al. "Modeling Hydro-Dynamics in a Harbor Area in the Daishan Island, China." Water 11, no. 2 (2019): 192. http://dx.doi.org/10.3390/w11020192.

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This study presents an incorporation and application of a two-dimensional, unstructured-grid hydrodynamic model with a suspended sediment transport module in Daishan, China. The model is verified with field measurement data from 2017: water level, flow velocities and suspended sediment concentration (SSC). In the application on the Daishan, the performance of the hydrodynamic model has been satisfactorily validated against observed variations of available measurement stations. Coupled with the hydrodynamic model, a sediment transport model has been developed and tested. The simulations agreed

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Tan, Sirui, Gboyega Ayeni, Jaewoo Park, et al. "Integrated velocity and attenuation model building: Sakhalin case study." Leading Edge 41, no. 3 (2022): 197–203. http://dx.doi.org/10.1190/tle41030197.1.

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Shallow gas accumulations with varied spatial distribution and scales cause amplitude loss and phase distortion in seismic images in underlying reservoir intervals. We present an integrated velocity and attenuation (defined by the quality factor Q) model-building workflow to address the imaging challenges in a shallow-water data set acquired offshore Sakhalin Island, Russia. As part of the workflow, we use full-waveform inversion (FWI) to capture fine details of the velocity and Q models. We achieve a step change in image quality improvement and amplitude fidelity enhancement by leveraging the

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Sheng, Jian, Yu Meng Wang, Han Lv, and Qing Fu Yang. "Velocity Calculation of Lahar in Changbai Mountain Region." Advanced Materials Research 726-731 (August 2013): 829–32. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.829.

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Lahar as one of most serious volcanic hazards, threats peoples lives and property securities of volcanic region. Velocity is the most important parameter for lahar hazard assessment and prevention. The calculation result of lahar velocity can provide reference materials for making hazard prevention plan, and make the hazard relief measure of lahar transition from passive to active. Selected the area near the Tianchi as the research region, and divided the research region into forming region, circulation region and accumulation region. In order to establish the calculation model, divided the ci

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25

Rocha, Helena, Ugo Lafont, and João P. Nunes. "Optimisation of Through-Thickness Embedding Location of Fibre Bragg Grating Sensor in CFRP for Impact Damage Detection." Polymers 13, no. 18 (2021): 3078. http://dx.doi.org/10.3390/polym13183078.

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Aerospace composites are susceptible to barely visible impact damage (BVID) produced by low-velocity-impact (LVI) events. Fibre Bragg grating (FBG) sensors can detect BVID, but often FBG sensors are embedded in the mid-plan, where residual strains produced by impact damage are lower, leading to an undervaluation of the damage severity. This study compares the residual strains produced by LVI events measured by FBG embedded at the mid-plan and other through-thickness locations of carbon fibre reinforced polymer (CFRP) composites. The instrumented laminates were subjected to multiple low-velocit

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26

Marjiyono, Marjiyono, Hadi Suntoko, A. Soehaimi, Yuliastuti Yuliastuti, and H. Syaeful. "KELAS SOIL DAERAH SEKITAR RENCANA TAPAK REAKTOR DAYA EKSPERIMENTAL (RDE) SERPONG DARI DATA MIKROTREMOR." Jurnal Pengembangan Energi Nuklir 17, no. 1 (2015): 57. http://dx.doi.org/10.17146/jpen.2015.17.1.2591.

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ABSTRAK KELAS SOIL DAERAH SEKITAR RENCANA TAPAK REAKTOR DAYA EKSPERIMENTAL (RDE) SERPONG DARI DATA MIKROTREMOR. Karakteristik geologi permukaan memegang peranan penting dalam analisis respon gelombang di suatu wilayah. Sehubungan dengan rencana pembangunan Reaktor Daya Eksperimental (RDE) di Serpong, telah dilakukan pemodelan kondisi bawah permukaan dari kombinasi data mikrotremor array dan single station. Pengukuran mikrotremor array dilakukan di 9 lokasi, sedangkan single station di 90 lokasi yang tersebar pada radius ± 1 km di sekitar tapak RDE. Model bawah permukaan yang berupa struktur ke

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27

Reno Arief Rachman, Haryo Dwito Armono, Dinar Catur istiyanto, Khusnul Setia Wardani, Hanah Khoirunnisa, and Reni Wijayanti. "Study of Hydrodynamic Patterns of Tanjung Pasir Banten Waters to Support the NCICD Sea Wall Development Plan." Journal of Geoscience, Engineering, Environment, and Technology 8, no. 1 (2023): 1–9. http://dx.doi.org/10.25299/jgeet.2023.8.1.10801.

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Numerical modeling of hydrodynamics (HD) around the Tanjung Pasir Waters was carried out using MIKE 21 HD Flexible Mesh software to get the current velocity pattern conditions during the west and east monsoons. This activity is to support the NCICD sea wall construction plan. In addition, the results that will be obtained in this modeling are the conditions of the speed and direction of the current in various tidal conditions during spring and neap. The data used in this modeling include wind speed and direction, wave height, wave period, and wave direction. Based on the research that has been

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28

Choi, A.-Young, Sin-Woong Choi, Chang Gyu Woo, and Dong-Hun Han. "Risk Analysis of Waterway Pipes in Rapid Flow Areas using CFD Simulations." Fire Science and Engineering 35, no. 3 (2021): 48–52. http://dx.doi.org/10.7731/kifse.70cf0feb.

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In this study, the validity of the theoretical model was examined by applying a CFD model and comparing the results of the existing theoretical equations for predicting the flow velocity inside and outside water pipes, and the dangers around the water pipes in the torrent area in relation to the recent fatal accidents of firefighters was analyzed. The CFD simulation was performed using the commercial analysis program ANSYS R1; the actual accident site was measured and simplified. The flow velocity was measured four times faster inside the canal pipe than the outside, and the results were used

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29

Hong, Wen Peng, and Song Chen Jian. "Numerical Simulation of Flue Gas Flow and NH₃ Diffusion Properties in SCR System." Advanced Materials Research 881-883 (January 2014): 1819–22. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1819.

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The numerical model of SCR denitrification system is established. Simulate the SCR system where installs mixer by the way of installing rectifier grille and three types of guide plates to analyze the changes of velocity, pressure and ammonia concentration before catalyst layer. The results indicate that setting rectifier grille and changing the guide plate size can make velocity and pressure of the whole flow are more stable. In plan 4, the deviation of ammonia concentration at the catalyst inlet section is 3.58%, avoid the phenomenon of ammonia escape and its satisfies the design requirements

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Wendt, Anke S., Monzurul Alam, and Joao Paulo Castagnoli. "Sand injectite mapping using a resistivity-velocity transform function." Leading Edge 40, no. 3 (2021): 202–7. http://dx.doi.org/10.1190/tle40030202.1.

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Lack of resolution in the distribution of sand injectites in hydrocarbon fields is common and makes it difficult to predict drilling challenges and plan for optimum production. A practical workflow was developed that enables the distinction of shale and sand bodies by using a combination of low-resolution seismic data and high-resolution resistivity log data. Measured resistivity logs were used to predict synthetic velocity logs, which accurately match shale velocities and over- or underestimate velocities of other rock types. The synthetic velocity logs were spatially distributed in a 3D cube

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Chen, Yan, Ken Chen, Hua Yan, Li Qiang Wang, and Lin Bin Zheng. "Simulation Analysis of Coating at Uniform Velocity of Robotic Spray Gun." Applied Mechanics and Materials 246-247 (December 2012): 1175–80. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.1175.

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Coating uniformity model was developed to optimize spray painting robot trajectories, assuming uniform robot motion and a parabolic spray distribution with uniformity evaluated based on the thickness variation. Dimensionless calculation results show that overlapping distance is a major influencing factor of mean coating thickness, and that seed path position and work piece width are secondary ones. Overlapping distance is a critical influencing factor of coating uniformity, but seed path position and work piece width exert little influence on coating uniformity. Minimum thickness variance is a

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Galyaev, A. A., V. P. Yakhno, P. V. Lysenko, L. M. Berlin, and M. E. Buzikov. "Optimization of Interception Plan for Rectilinearly Moving Targets." Avtomatika i telemehanika, no. 10 (December 15, 2023): 18–36. http://dx.doi.org/10.31857/s0005231023100033.

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The article considers the problem of combinatorial optimization of interception of rectilinearly moving targets as a modification of the traveling salesman problem. New macro characteristics and definitions for this problem are introduced and used to classify the obtained solutions. Vector criteria composed of several important for applications functionals are described. The principles of nowaitingand maximum velocity are proved for two types of criteria. An intelligent brute-force algorithm with dynamic programming elements for finding optimal plans according to the introduced intercept crite

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Yang, Fan, Yiqi Zhang, Chao Liu, Tieli Wang, Dongjin Jiang, and Yan Jin. "Numerical and Experimental Investigations of Flow Pattern and Anti-Vortex Measures of Forebay in a Multi-Unit Pumping Station." Water 13, no. 7 (2021): 935. http://dx.doi.org/10.3390/w13070935.

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The forebay of a pumping station is an important building connecting the diversion channel and the intake pool. Based on the physical model test and research method of computational fluid dynamics (CFD) based on the improved fluid volume model, the flow field in a forebay of a multi-unit pumping station is analyzed in combination with the engineering practice of the Exi River flood discharge station in the Anhui Province, China. Aiming at the technical problems of a large-scale swing water area in the forebay internal flow field of a lateral intake pumping station, the technical problems are d

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Nusantara, Danayanti Azmi Dewi, Feriza Nadiar, and Nastasia Festy Margini. "Drainage Analysis of the West Outer Ring Road Surabaya." Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan 8, no. 1 (2023): 73–86. http://dx.doi.org/10.30736/cvl.v8i1.1050.

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The development of West Outer Ring Road, abbreviated as JLLB, to improve the quality of infrastructure in the City of Surabaya. A breakthrough is needed by opening a new existing road section to break down traffic jams that lead to the main corridor section of the central city. The JLLB area, originally a green open area, was converted into a road area. This condition will cause changes in the sum of rainwater runoff that occur. The JLLB also intersects with the railroad tracks. A drainage system plan to ensure no puddles on the road, even through the railroad tracks. The method of this study

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Guo, Songling, Lijun Song, Shicheng Wang, Jinfu Li, and Yuanyuan Tian. "Thin reservoir prediction technology with sensitive parameters of tight gas in southwest Ordos Basin." Advances in Computer and Engineering Technology Research 1, no. 2 (2024): 12. http://dx.doi.org/10.61935/acetr.2.1.2024.p12.

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In the southwest of Ordos Basin, the loess layer is very thick, the surface elevation changes rapidly, and the near-surface low-velocity zone velocity changes greatly in vertical and horizontal directions, resulting in prominent static correction problems. Affected by the strong absorption of the loess layer, the effective frequency band of the original data is narrow, the apparent main frequency is low, and the "double high" processing is difficult. The reservoirs of He-8 and Shan-1 are deep-buried, thin and dense, and their lateral changes are fast. In this paper, the sensitive data of "two

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Kim, Juhyun, Maolin Jin, Sang Hyun Park, Seong Youb Chung, and Myun Joong Hwang. "Task Space Trajectory Planning for Robot Manipulators to Follow 3-D Curved Contours." Electronics 9, no. 9 (2020): 1424. http://dx.doi.org/10.3390/electronics9091424.

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The demand for robots has increased in the industrial field, where robots are utilized in tasks that require them to move through complex paths. In the motion planning of a manipulator, path planning is carried out to determine a series of the positions of robot end effectors without collision. Therefore, it is necessary to carry out trajectory planning to determine position, velocity, and acceleration over time and to control an actual industrial manipulator. Although several methods have already been introduced for point-to-point trajectory planning, a trajectory plan which moves through mul

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Acakpovi, Amevi, Majeed B. Issah, Francois X. Fifatin, and Mathias B. Michael. "Wind velocity extrapolation in Ghana by Weibull probability density function." Wind Engineering 42, no. 1 (2017): 38–50. http://dx.doi.org/10.1177/0309524x17723205.

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This article proposes a database of reliable wind velocities across the whole Ghana divided into 24 locations, based on data collected for the year 2013, although the bigger plan is to cover the period 2013–2018. For the year 2013 specifically, the proposed data were obtained through extrapolation of RETScreen data on wind velocity in Ghana, originally taken at a height of 10 m to a height of 60 m, adequate for generation using Weibull distribution function. The model led to the determination of the shape factor k and the scale factor c for all the 24 locations which subsequently led to the ex

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Poletto, Flavio, José M. Carcione, Massimo Lovo, and Francesco Miranda. "Acoustic velocity of seismic‐while‐drilling (SWD) borehole guided waves." GEOPHYSICS 67, no. 3 (2002): 921–27. http://dx.doi.org/10.1190/1.1484534.

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Borehole guided waves, other than the extensional waves traveling through the drillstring, can be used as pilot signals to obtain seismic‐while‐drilling (SWD) seismograms and information about the drilling conditions. This occurs when there is no rotation of the drillstring while drilling and when the contacts between the drillpipe and the borehole wall preclude the propagation of the extensional wave. To obtain the velocity of the guided waves, we model the compressional‐wave velocity of drilling mud with different compositions of low‐ and high‐gravity solids, corresponding to a given drillin

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Birzhandi, Mohammad S., and Amir M. Halabian. "Probabilistic assessment of plan-asymmetric structures under the near-fault pulse-like events considering soil–structure interaction." Advances in Structural Engineering 22, no. 3 (2018): 702–21. http://dx.doi.org/10.1177/1369433218798305.

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This study aims to evaluate the torsional effects and soil–structure interaction simultaneously under near-fault pulse-like earthquakes in a probabilistic framework. Incremental dynamic analysis and fragility curves are employed for this goal. An eight-story R/C dual lateral load-resistant building consisting of shear walls and moment resisting frames is used. The median incremental dynamic analysis curves reported the maximum capacity for the symmetric structure in each foundation conditions. In addition, the capacity of structure will be increased when more shear wave velocity is assumed. Th

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Omiya, Masashi, Bun'ei Sato, Hiroki Harakawa, Masayuki Kuzuhara, Teruyuki Hirano, and Norio Narita. "Search for Low-Mass Planets Around Late-M Dwarfs Using IRD." Proceedings of the International Astronomical Union 8, S293 (2012): 201–3. http://dx.doi.org/10.1017/s1743921313012830.

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AbstractWe have a plan to conduct a Doppler planet search for low-mass planets around nearby middle-to-late M dwarfs using IRD. IRD is the near-infrared high-precision radial velocity instrument for the Subaru 8.2-m telescope. We expect to achieve the accuracy of the radial velocity measurements of 1 m/s using IRD with a frequency comb as a wavelengh calibrator. Thus, we would detect super-Earths in habitable zone and low-mass rocky planets in close-in orbits around late-M dwarfs. In this survey, we aim to understand and discuss statistical properties of low-mass planets around low-mass M dwar

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Zaki, Sheikh Ahmad, Saidatul Sharin Shuhaimi, Ahmad Faiz Mohammad, Mohamed Sukri Mat Ali, Khairur Rijal Jamaludin, and Mardiana Idayu Ahmad. "Development of a Prediction Model of the Pedestrian Mean Velocity Based on LES of Random Building Arrays." Buildings 12, no. 9 (2022): 1362. http://dx.doi.org/10.3390/buildings12091362.

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Wind speed in urban areas is influenced by the interaction between wind flow and building geometry; at the pedestrian level, the interaction is more complex, particularly with high building density. This study investigated the wind velocity distribution and the mean velocity ratio at the pedestrian level using the large-eddy simulation (LES) database based on random building arrays of several plan area densities, λp. The heights of random buildings are between 0.36 h and 3.76 h where h = 0.025 m. Mean streamwise velocity profiles were obtained at the pedestrian level for all arrays and were fo

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Rousseau, Célia, Charalambos Papaxanthis, Jérémie Gaveau, Thierry Pozzo, and Olivier White. "Initial information prior to movement onset influences kinematics of upward arm pointing movements." Journal of Neurophysiology 116, no. 4 (2016): 1673–83. http://dx.doi.org/10.1152/jn.00616.2015.

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To elaborate a motor plan and perform online control in the gravity field, the brain relies on priors and multisensory integration of information. In particular, afferent and efferent inputs related to the initial state are thought to convey sensorimotor information to plan the upcoming action. Yet it is still unclear to what extent these cues impact motor planning. Here we examined the role of initial information on the planning and execution of arm movements. Participants performed upward arm movements around the shoulder at three speeds and in two arm conditions. In the first condition, the

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Lazaridis, Georgios Theodoros, Kyriaki Fellachidou, and Maria-Nefeli Georgaki. "Paleohydrology of the Stefanina Cave (Greece)." Bulletin of the Geological Society of Greece 57, no. 1 (2021): 52. http://dx.doi.org/10.12681/bgsg.26168.

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The development of hypergene Stefanina Cave, the hydrological conditions, and the maximum discharge of the paleo-flow are studied, based on its pattern in ground-plan, the geometry of the passage, and the peak flow velocity from the dimensions of the scallops. The village of Stefanina is located East of Thessaloniki and the cave NE of the village. A study was conducted measuring the orientation of the discontinuities of the rocks inside and outside the cave, the scallops in various sites to estimate the flow velocities, and in addition, were taken photographs for the full analysis of its cross

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Gao, Wei, Mengxue Han, Zhao Wang, Lihui Deng, Hongjian Wang, and Jingfei Ren. "Research on Method of Collision Avoidance Planning for UUV Based on Deep Reinforcement Learning." Journal of Marine Science and Engineering 11, no. 12 (2023): 2245. http://dx.doi.org/10.3390/jmse11122245.

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A UUV can perform tasks such as underwater surveillance, reconnaissance, surveillance, and tracking by being equipped with sensors and different task modules. Due to the complex underwater environment, the UUV must have good collision avoidance planning algorithms to avoid various underwater obstacles when performing tasks. The existing path planning algorithms take a long time to plan and have poor adaptability to the environment. Some collision-avoidance planning algorithms do not take into account the kinematic limitations of the UUV, thus placing high demands on the performance and control

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Lanzarone, Peter, Xukai Shen, Andrew Brenders, et al. "Innovative application of full-waveform inversion applied to extended wide-azimuth marine streamer seismic data in a complex salt environment." GEOPHYSICS 87, no. 3 (2022): B193—B205. http://dx.doi.org/10.1190/geo2021-0374.1.

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We demonstrate the application of full-waveform inversion (FWI) guided velocity model building to an extended wide-azimuth towed streamer (EWATS) seismic data set in the Gulf of Mexico. Field data are collected over a historically challenging imaging area, colloquially called the “grunge zone” due to the formation of a compressional allosuture emplaced between two colliding salt sheets. These data have a poor subsalt image below the suture with conventional narrow-azimuth data. Additional geologic complexities are observed including high-velocity carbonate carapace near the top of salt and mul

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Ferri-Caruana, Ana, Elena Muñoz-Gómez, Sara Mollà-Casanova, Pablo Camarón-Mallén, and Pilar Serra-Añó. "impact of velocity-based movement on electromyography activity in standard lower-limb strength exercises." Scientific Journal of Sport and Performance 2, no. 3 (2023): 314–25. http://dx.doi.org/10.55860/mxqo3997.

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Previous research has shown that the velocity of movement can influence muscle activation. However, no studies have investigated the impact of movement velocity under the same load conditions on electromyography (EMG) activity in knee and hip extensors. This study aims to compare the mean muscle activation of gluteus maximus [GM], biceps femoris [BF], semitendinosus [ST] and rectus femoris [RF] in three hip extension exercises (i.e., squat [SQ], hip thrust [HT] and Bulgarian squat [BS]) with two different movement velocities (i.e., maximum velocity [MV] and controlled velocity [CV]). Fifteen p

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Hoenig, Wolfgang, T. K. Kumar, Liron Cohen, et al. "Multi-Agent Path Finding with Kinematic Constraints." Proceedings of the International Conference on Automated Planning and Scheduling 26 (March 30, 2016): 477–85. http://dx.doi.org/10.1609/icaps.v26i1.13796.

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Multi-Agent Path Finding (MAPF) is well studied in both AI and robotics. Given a discretized environment and agents with assigned start and goal locations, MAPF solvers from AI find collision-free paths for hundreds of agents with user-provided sub-optimality guarantees. However, they ignore that actual robots are subject to kinematic constraints (such as finite maximum velocity limits) and suffer from imperfect plan-execution capabilities. We therefore introduce MAPF-POST, a novel approach that makes use of a simple temporal network to postprocess the output of a MAPF solver in polynomial tim

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Rai, Ajay Kumar, and Ritu Tiwari. "Collision Avoidance in Dynamic Environment by Estimation of Velocity and Location of Object by Robot using Parallax." International Journal of Robotics Applications and Technologies 3, no. 2 (2015): 63–75. http://dx.doi.org/10.4018/ijrat.2015070104.

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Collision avoidance is a challenging problem in robot navigation. There are two type of collision avoidance approach i.e. path planning algorithm and control algorithm. Control algorithm proven very useful for dynamic environment. In control method robot use sensing to close a feedback path and interact with the environment. This sensing feedback loop can be completed by using Camera in robot.Visual parallax is very useful for generation of 3D information of environment for robotic system. Here the authors describe the use of visual parallax in humanoid robotic system for estimation of velocit

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Hindmarsh, Richard C. A. "An observationally validated theory of viscous flow dynamics at the ice-shelf calving front." Journal of Glaciology 58, no. 208 (2012): 375–87. http://dx.doi.org/10.3189/2012jog11j206.

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AbstractAn analytical theory is developed for ice flow velocity in a boundary layer couplet at the calving front. The theory has simple quantitative characteristics that relate ice front velocity to thickness, strain rate and shelf width, matching one set of empirically derived relationships (Alley and others, 2008) and implying that these relationships predict ice velocity rather than calving rate. The two boundary layers are where longitudinal and transverse flow fields change from the interior flow to patterns consistent with the calving-front stress condition. Numerical simulations confirm

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Fan, Cheng, Lei Zhang, Qizhi Zhao, Jun Zhao, Ji Zhao, and Lining Sun. "Modeling and optimization of material removal influenced by sliding velocity in polishing." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 4 (2018): 1127–35. http://dx.doi.org/10.1177/0954405418774589.

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The high-precision part surfaces are usually finished by the corrective polishing to improve the surface form accuracy. This article proposes a new method to model and optimize the material removal in the polishing process. This method assumes that the material removal rate in polishing follows the Preston’s equation, and the material removal profile is obtained by integrating the material removal index along the tool path at each unit area of the tool/workpiece contact. The focus is on the effect of the sliding velocity on the material removal profile. Results indicate that the shape of the r

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