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1921
Bar Instability and Formation Timescale across Toomre’s Q Parameter and Central Mass Concentration: Slow Bar Formation or True Stability
Published 2025-01-01“…Of importance is that, as suggested by cosmological simulations, disk galaxies have a limited time of ~8 Gyr in the Universe’s timeline to evolve secularly, starting when they became physically and kinematically steady to prompt the bar instability. By incorporating this time limit, bar-unstable disks are further subdivided into those that establish a bar before and after that time, namely, the normal and the slowly bar-forming disks. …”
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1922
Experimental stand for physical modelling of flows in the flow path of hydraulic turbines
Published 2023-09-01“…This installation allows to carry out physical modelling of complex flows to obtain kinematic and dynamic characteristics of the flow.Materials and methods. …”
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1923
Local Path Planning for Unmanned Surface Vehicle Collision Avoidance Based on Modified Quantum Particle Swarm Optimization
Published 2020-01-01“…According to the collision avoidance model, the USV needs to adjust its velocity and course simultaneously to avoid collision. Due to the kinematic constraints of the USV, the velocity window and course window of the USV are determined by the dynamic window approach (DWA). …”
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1924
Doppler Effect Estimation and Compensation for Satellite Systems in Geolocation Problems
Published 2025-01-01“…The main goal of the paper is to give real-time estimation and compensation strategy for the Doppler factor considering only the current instantaneous kinematic information, without the information on the history of the signal over time. …”
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1925
Establishing thresholds for swing transparency at the knee during gait to inform exoskeleton design.
Published 2025-01-01“…Kinematics, muscle activity, and perceived impedance all changed in response to added stiffness and damping. …”
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1926
The Impact of Exercise Play on the Biomechanical Characteristics of Single-Leg Jumping in 5- to 6-Year-Old Preschool Children
Published 2025-01-01“…Objective: This study aimed to investigate the effects of a 12-week self-designed exercise game intervention on the kinematic and kinetic data of the supporting leg in preschool children during the single-leg jump. …”
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1927
Terrain Adaptive Estimation of Instantaneous Centres of Rotation for Tracked Robots
Published 2018-01-01“…As a type of skid-steering mobile robot, the tracked robot suffers from inevitable slippage, which results in an imprecise kinematics model and a degradation of performance during navigation. …”
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1928
Research and Application of the Solving Method for Robotic Workspace
Published 2015-01-01“…Based on Staubli TX60 L six axis serial robot,the workspace is respectively generated by using numerical method,the geometric mapping method and the proposed method,and comparison analysis is carried out,the results prove that this method need not to consider complex kinematics equation,and the accuracy high and computing speed fast.…”
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1929
The Sivers asymmetry in deep inelastic charged lepton scattering on a transverse polarized proton target
Published 2024-12-01“…The calculation was performed in the kinematics of the COMPASS experiment: a muon with an energy of 160 GeV scatters on a stationary proton target. …”
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1930
The scheme of shaping back surface of five-sided carbide inserts on CNC machines
Published 2023-02-01“…An algorithm for the implementation of the kinematic scheme for shaping the rear surface of pentahedral carbide plates using CAD tools has been developed. …”
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1931
Some Investigations on the Anisotropy of the Chemical Etching of (h k 0) and (h h l) Silicon Plates in a NaOH 35% Solution. Part II: 3D Etching Shapes, Analysis and Comparison with...
Published 2001-01-01“…Etching shapes are analysed in terms of the kinematic and tensorial model for the anisotropic dissolution of crystals. …”
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1932
A multi-level analysis of motor and behavioural dynamics in 9-month-old preterm and term-born infants during changing emotional and interactive contexts
Published 2025-01-01“…We report two studies employing dynamic analyses of motor kinematics and motor behaviours, which characterise movement at two levels, in 9-month-old infants. …”
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1933
Study on the Workspace and Structural Parameter of 3-RPS Parallel Robot
Published 2015-01-01“…The three-dimensional model is built based on the structure characters of 3-RPS parallel robot through using Pro/E software.The inverse kinematics of the mechanism is obtained by using a new numerical algorithm,and the limit searching method is used to simulate the workspace through using MATLAB software.The simulation results are compared with the Euler angle algorithm.The influence of mechanism parameters on the workspace is analyzed,and the maximum volume of workspace in the parameter range is derived.A foundation for parallel robot parameter optimization and path planning is Laid.…”
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1934
La construction des appellations viticoles et la géographie juridique
Published 2015-03-01“…Guaranteed vintage constitute an example of choice by the implications socioeconomic, which the law can have by structuring a guaranteed vintage and a winemaking territory. We were interested in the case of the area guaranteed vintage of Cahors to show in a very large-scale approach, which is necessary to base the law on the least questionable possible criteria.…”
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1935
An Accurate Upper Bound Solution for Plane Strain Extrusion through a Wedge-Shaped Die
Published 2014-01-01“…A technique for constructing a kinematically admissible velocity field satisfying the exact asymptotic singular behavior of real velocity fields in the vicinity of maximum friction surfaces (the friction stress at sliding is equal to the shear yield stress on such surfaces) is described. …”
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1936
Research Progress of Unpowered Exoskeleton Assist Robot
Published 2020-02-01“…The definition and classification are expounded systematically and the principles are introduced. The kinematic diagram of typical domestic and foreign unpowered exoskeleton assist robot is drawn and the corresponding structure principle is briefly described. …”
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1937
Structural Design of the High Voltage Transmission Line Tower Climbing Robots
Published 2015-01-01“…Focusing on the fault and the maintain of the tower structure in the high voltage transmission lines,the high voltage tower climbing robot is designed,the robot carries many sensors and two cameras in the front and the end,thus,the robot could achieve to grab different types of angle iron in multi-angle.The model is established by using Solidworks,and the kinematics analysis and simulation of the tower climbing robot is established in the Solidworks.Because of the climbing and grab structure of the robot is important,the statics analysis of the key position are carried out in the ANSYS Workbench.…”
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1938
Dynamic Modeling and Simulation Control of 3-DOF Bionic Shoulder Joint
Published 2017-01-01“…Based on screw theory,the freedoms of 3-DOF parallel mechanism are analyzed. The kinematics model of parallel mechanism is established because of its simple reverse solution. …”
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1939
THERMAL ANALYSIS OF EXOSKELETON HYDRAULIC POWER UNIT BASED ON ANSYS
Published 2017-01-01“…Taking exoskeleton principle prototype hydraulic power unit as research object,using the method of Fourier series to establish the exoskeleton kinematics model,analyzing the characteristics of exoskeleton hydraulic system to get hydraulic power unit required heat dissipated power. …”
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1940
Preliminary Exploration of the Topological Structure of the Crank- Group Driving Mechanism
Published 2015-01-01“…Based on the topological theory,taking the typical structures of the crank- group driving mechanism( the single driven crank driving mechanism and the double driven crank driving mechanism) as examples,a preliminary study and exploration of its topological structure is conducted by using kinematic chain and the matrix. To solve the mechanism problems through the topological structure theory,the organic integration of topology and mechanism is achieved. …”
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