Results 231 to 240 of about 653,533 (289)

Surface Locomotion of Cell‐Sized Microrobots Subject to Adhesive Heterogeneity

Small, EarlyView.
Chemically powered, cell‐sized microrobots exhibit translational, circular, or spiral motion through a balance among self‐phoretic propulsion, drag, gravity, and heterogeneous surface interactions. Experiments show that microrobot design and substrate conditions regulate both mobility and trajectory type.
Byung Ha Kang, Sungyun Yang, Hyeongho Min, Michael S. Strano   +3 more
wiley   +1 more source

A 4D‐STEM Tomographic Framework Assisted by Object Tracking for Nanoparticle Structure Determination

Small Methods, EarlyView.
4D‐STEM tomography is used as a new methodology for 3D ED data acquisition to solve structures. Object tracking and segmentation methods are applied for the extraction of 3D ED datasets from regions of interest in a 4D‐STEM tomogram. Owing to its nanometric resolution, 4D‐STEM tomography can tackle challenging samples being too small for 3D ED, have ...
Saleh Gholam, Arno Annys, Irina Skvortsova, Erica Cordero Oyonarte, Amirhossein Hajizadeh, Philippe Boullay, Johan Hofkens, Johan Verbeeck, Joke Hadermann   +8 more
wiley   +1 more source

Numerical Study of Argon Bubble Transport and Entrapment in Continuous Casting Using a Multiphase Approach

steel research international, EarlyView.
Bubble transport in continuous casting is controlled by the interaction of bubble size, flow dynamics, and operating conditions. Critical regions governing bubble escape and entrapment are identified, revealing the mechanisms responsible for defect formation and providing practical guidance for process optimization. Argon injection is often used in the
Dianzhi Meng, Mingqian Wang, Armin K. Silaen, Bikram Konar, Shaojie Chen, Chenn Zhou   +5 more
wiley   +1 more source

A probabilistic framework for modeling chloride‐induced corrosion and related load‐deformation behaviour of reinforced concrete

Structural Concrete, EarlyView.
Abstract Chloride‐exposed reinforced‐concrete structures often suffer localized corrosion, so corrosion initiation time and average steel loss are poor indicators of structural performance. This paper presents a spatially resolved, proof‐of‐concept framework that couples diffusion‐based chloride ingress and initiation with a localized morphology model ...
Deniz Yilmaz, Karel Thoma, Ueli Angst
wiley   +1 more source

Strong ground motion and structural damage in the 2023 Kahramanmaraş earthquakes: A comparative case study of numerical predictions and field observations

Structural Concrete, EarlyView.
Abstract On February 6, 2023, southeastern Türkiye was struck by two catastrophic earthquakes (Mw: 7.7 and Mw: 7.6) along the East Anatolian Fault Zone, causing extensive structural failures and significant loss of life. This study evaluates the seismotectonic characteristics of the sequence, analyzes strong ground motion data against the Turkish ...
Saruhan Kartal, Yetis Bulent Sonmezer, Selcuk Bas   +2 more
wiley   +1 more source

Robotic Hand‐Arm Coordinated Skill Learning for Tool Manipulation Tasks

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT This paper focuses on the specific scenario of tool manipulation and presents a novel framework enabling robots to acquire tool manipulation skills through learning from human demonstrations. While there have been numerous studies on robotic manipulation skill learning, most of them fail to fully leverage the combined advantages of coordinated
Jingxiang Chen, Lingzi Xie, Bidan Huang, Shuai Wang, Sicheng Yang, Wang Wei Lee, Chao Zeng, Jialong Yang, Tianliang Liu, Chenguang Yang   +9 more
wiley   +1 more source

Study on the Power‐Frequency Arc Extinction Characteristics of Semi‐Closed Short‐Gap Device

High Voltage, EarlyView.
ABSTRACT Multi‐chamber arc‐extinguishing devices have a simple structure and excellent arc‐extinguishing performance; thus, they have attracted considerable attention as lightning protection devices. However, the structural parameters of different models of the aforementioned devices vary, leading to inconsistent protection levels; therefore, the arc ...
Yeqiang Deng, Caiwei Pan, Jintian Chen, Yu Wang, Lei Lan   +4 more
wiley   +1 more source

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Learning inverse kinematics

Proceedings 2001 IEEE/RSJ International Conference on Intelligent Robots and Systems. Expanding the Societal Role of Robotics in the the Next Millennium (Cat. No.01CH37180), 2002
Real-time control of the end-effector of a humanoid robot in external coordinates requires computationally efficient solutions of the inverse kinematics problem. In this context, this paper investigates inverse kinematics learning for resolved motion rate control (RMRC) employing an optimization criterion to resolve kinematic redundancies. Our learning
Aaron D'Souza, Sethu Vijayakumar, Stefan Schaal   +2 more
openaire   +2 more sources

The Inverse Kinematic Problems

2017
The problem of recovering the sound speed (or index of refraction) from travel time measurements is an important issue in determining the substructure of the Earth.
Alemdar Hasanov Hasanoğlu, Vladimir G. Romanov   +1 more
openaire   +1 more source

Inverse kinematics of a mobile robot

Neural Computing and Applications, 2012
The problem of kinematics is to describe the motion of the robotic system without consideration of the forces and torques causing the motion. This paper presents two methods to obtain the inverse kinematics of a mobile robot. In the first method, two rows of the forward kinematics are selected, the inverse of these two rows is obtained, and later the ...
José de Jesús Rubio, Víctor Aquino, Maricela Figueroa   +2 more
openaire   +2 more sources