Results 51 to 60 of about 31,283 (265)

Application of Ultrasonic Lamb Wave Logging Technology in Bohai Oilfield

open access: yesShiyou jixie, 2020
It is restricted and difficult for present sonic logging and sector cement logging technologies used in cementing quality evaluation of low-density cement slurry, casing eccentricity evaluation and casing damage detection. An ultrasonic Lamb wave logging
Han Yaotu   +4 more
doaj  

Wiener Complexity versus the Eccentric Complexity

open access: yesMathematics, 2020
Let wG(u) be the sum of distances from u to all the other vertices of G. The Wiener complexity, CW(G), is the number of different values of wG(u) in G, and the eccentric complexity, Cec(G), is the number of different eccentricities in G.
Martin Knor, Riste Škrekovski
doaj   +1 more source

TacScope: A Miniaturized Vision‐Based Tactile Sensor for Surgical Applications

open access: yesAdvanced Robotics Research, EarlyView.
TacScope is a compact, vision‐based tactile sensor designed for robot‐assisted surgery. By leveraging a curved elastomer surface with pressure‐sensitive particle redistribution, it captures high‐resolution 3D tactile feedback. TacScope enables accurate tumor detection and shape classification beneath soft tissue phantoms, offering a scalable, low‐cost ...
Md Rakibul Islam Prince   +3 more
wiley   +1 more source

Impact of Static Rotor Eccentricity on the NVH Behavior of Electric Permanent Magnet Synchronous Machines

open access: yesMachines
In comparison to internal combustion engines, which usually have low frequency, broadband excitations, in electric vehicles, tonal excitations from the electric drivetrain are noticeable and disturbing.
Julius Müller   +3 more
doaj   +1 more source

THE STUDY OF ECCENTRICITY SPECTRUM AND ENERGY IN PATH AND CYCLE GRAPHS

open access: yesBarekeng, 2023
The eccentricity matrix is one of matrices to represent graphs. The eccentricity matrix is used as a basis for calculating the eccentricity spectrum and energy. This article aims to study the concepts of eccentricity spectrum and energy in simple graphs.
Ni Kadek Emik Sapitri   +1 more
doaj   +1 more source

Hybrid Continuum Robot Designs and Architectures for Healthcare Applications

open access: yesAdvanced Robotics Research, EarlyView.
Hybrid continuum robots represent an emerging class of flexible manipulators that blend materials, structures, and actuation concepts from the established fields of soft and continuum robotics. This review introduces an accessible framework to distinguish key hybridization approaches, surveys current designs aimed at complex clinical applications, and ...
Burak Ozdemir   +4 more
wiley   +1 more source

Design and Modeling of a High‐Displacement, Skin‐Integrated Flexible Electromagnetic Actuator for Haptic Interfaces in Virtual Reality

open access: yesAdvanced Robotics Research, EarlyView.
A flexible, skin‐integrated electromagnetic actuator is developed for wearable virtual/augmented reality (VR/AR) haptic systems. A tunable design model enables control over displacement and resonance frequency. The system is validated through a custom VR application with a 6 × 4 actuator array, demonstrating real‐time, spatially targeted tactile ...
Naji Tarabay   +9 more
wiley   +1 more source

Mechanistic Study on Critical Heat Flux in Vertical Eccentric and Rod Bowing Internally Heated Annuli

open access: yesYuanzineng kexue jishu, 2022
Critical heat flux (CHF) prediction methods used in subchannel codes are primarily based on tube CHF values. These methods do not take bundle-specific effects into account, such as element gap size, curvature and the presence of an adjacent unheated ...
GUO Junliang;KONG Huanjun;GUI Miao;PENG Yujiao;SHAN Jianqiang
doaj  

Properties of Entropy-Based Topological Measures of Fullerenes

open access: yesMathematics, 2020
A fullerene is a cubic three-connected graph whose faces are entirely composed of pentagons and hexagons. Entropy applied to graphs is one of the significant approaches to measuring the complexity of relational structures.
Modjtaba Ghorbani   +2 more
doaj   +1 more source

Role of eccentricity in early Holocene African and Asian summer monsoons

open access: yesScientific Reports, 2021
The effect of precession on paleoclimate changes depends on eccentricity. However, whether and to what degree eccentricity relates to millennial-scale monsoonal changes remain unclear.
Chi-Hua Wu, Shih-Yu Lee, Pei-Chia Tsai
doaj   +1 more source

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