Results 81 to 90 of about 13,842 (293)

Generalized variational inequalities and generalized quasi-variational inequalities

open access: yesJournal of Mathematical Analysis and Applications, 1990
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ding, Xie Ping, Tan, Kok-Keong
openaire   +2 more sources

A Novel Contact‐Implicit Trajectory Optimization Framework for Quadruped Locomotion without Fixed Contact Sequences

open access: yesAdvanced Intelligent Systems, EarlyView.
Legged robots have advanced in environmental interaction through contact, but most works rely on fixed contact sequences. This work presents a new method based on an indirect optimization method for legged robots to automatically generate contact sequences for complex movements.
Yaowei Chen, Jie Zhang, Ming Lyu
wiley   +1 more source

Planning and Control Framework for a Quadruped Robot With Changeable Configuration

open access: yesAdvanced Intelligent Systems, EarlyView.
Multiconfiguration quadruped robots enhance adaptability by switching between mammal‐like and reptile‐like morphologies. This study presents a nonlinear constraint‐based motion planner integrated with a hierarchical whole‐body controller, enabling robust configuration switching and locomotion on complex terrains. Experiments on slopes, irregular bricks,
Guanglin Lu   +5 more
wiley   +1 more source

On New Proximal Point Methods for Solving the Variational Inequalities [PDF]

open access: gold, 2011
Muhammad Aslam Noor   +2 more
openalex   +1 more source

Multi-Valued Parabolic Variational Inequalities and Related Variational-Hemivariational Inequalities

open access: yesAdvanced Nonlinear Studies, 2014
Abstract In this paper we study multi-valued parabolic variational inequalities involving quasilinear parabolic operators, and multi-valued integral terms over the underlying parabolic cylinder as well as over parts of the lateral parabolic boundary, where the multi-valued functions involved are assumed to be upper semicontinuous only ...
Carl, Siegfried, Le, Vy Khoi
openaire   +2 more sources

A Soft Wearable Robot for Vertical Jump Enhancement via a Pneumatic Energy‐Storing Propulsion Actuator and Triarticular Kinetic‐Chained Structure

open access: yesAdvanced Intelligent Systems, EarlyView.
The Jump‐Enhancing Textile Suit integrates the Pneumatic Energy‐Storing Propulsion Actuator (PESPA) and the Triarticular Kinetic‐Chained Structure (TKiCS). PESPA stores elastic energy under pneumatic pressure and releases it during the propulsive phase to augment movement.
Sunghun Kim   +5 more
wiley   +1 more source

Data from Changes in Geographic Variation and Socioeconomic Inequalities in Esophageal Cancer Mortality in China, 1973–2017

open access: gold, 2023
Xianhui Ran   +10 more
openalex   +1 more source

On the Generalized Nonlinear Variational Inequalities and Quasi-Variational Inequalities

open access: yesJournal of Mathematical Analysis and Applications, 1996
The paper deals with two kinds of variational inequality problems: 1. (Generalized nonlinear variational inequality problem -- GNVI\((T,g,b,X)\)) Find \(\widehat x\in X\) and \(\widehat w\in T\widehat x\) such that \[ \text{Re}\langle\widehat w,g(\widehat x) -g(y)\rangle+ b(\widehat x,\widehat x)- b(\widehat x,y)\geq 0\;\forall y\in X; \] 2 ...
Yu, Su-Jane, Yao, Jen-Chih
openaire   +1 more source

A Multi‐instrument Recognition and Autonomous Tracking Control Method for Robot‐Assisted Endoscopic Adjustment

open access: yesAdvanced Intelligent Systems, EarlyView.
During lengthy minimally invasive surgeries, fatigue can cause surgeon tremor and poor endoscopic coordination. This study proposes a robot‐assisted endoscopic adjustment system. It employs a lightweight instrument detection model and a hierarchical multiconstraint controller for visual servoing.
Zijie Yang   +5 more
wiley   +1 more source

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