Results 21 to 30 of about 194,334 (231)

Human–robot interface based on sEMG envelope signal for the collaborative wearable robot

open access: yesBiomimetic Intelligence and Robotics, 2023
Surface electromyography (sEMG) control interface is a common method for human-centered robotics. Researchers have frequently improved the recognition accuracy of sEMG through multichannel or high-precision signal acquisition devices.
Ziyu Liao   +6 more
doaj   +1 more source

Compact MIMO antenna for portable devices in UWB applications [PDF]

open access: yes, 2013
A compact multiple-input-multiple-output (MIMO) antenna with a small size of 26× 40mm2 is proposed for portable ultrawideband (UWB) applications. The antenna consists of two planar-monopole (PM) antenna elements with microstrip-fed printed on one side of
Cheung, SW, Liu, L, Yuk, TTI
core   +1 more source

A Novel Method for Bearing Fault Diagnosis under Variable Speed Based on Envelope Spectrum Fault Characteristic Frequency Band Identification

open access: yesSensors, 2023
Rolling element bearing (REB) vibration signals under variable speed (VS) have non-stationary characteristics. Order tracking (OT) and time-frequency analysis (TFA) are two widely used methods for REB fault diagnosis under VS.
Di Pei, Jianhai Yue, Jing Jiao
doaj   +1 more source

Chemical survey toward young stellar objects in the Perseus molecular cloud complex [PDF]

open access: yes, 2018
Chemical diversity of the gas in low-mass protostellar cores is widely recognized. In order to explore its origin, a survey of chemical composition toward 36 Class 0/I protostars in the Perseus molecular cloud complex, which are selected in an unbiased ...
Bachiller, Rafael   +14 more
core   +4 more sources

Early Fault Detection of Rolling Bearings Based on Time-Varying Filtering Empirical Mode Decomposition and Adaptive Multipoint Optimal Minimum Entropy Deconvolution Adjusted

open access: yesEntropy, 2023
Due to the early formation of rolling bearing fault characteristics in an environment with strong background noise, the single use of the time-varying filtering empirical mode decomposition (TVFEMD) method is not effective for the extraction of fault ...
Shuo Song, Wenbo Wang
doaj   +1 more source

Second order statistics of NLOS indoor MIMO channels based on 5.2 GHz measurements [PDF]

open access: yes, 2001
This document is made available in accordance with publisher policies. Please cite only the published version using the reference above.
Beach, MA   +5 more
core   +3 more sources

Vacuum Insulation Panels (VIPs) for building construction industry - A review of the contemporary developments and future directions [PDF]

open access: yes, 2011
This is the post-print version of the final paper published in Applied Energy. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and ...
Alam, M, Limbachiya, MC, Singh, H
core   +2 more sources

Effect of Pulse Shaping on Subharmonic Aided Pressure Estimation In Vitro and In Vivo. [PDF]

open access: yes, 2016
OBJECTIVES: Subharmonic imaging (SHI) is a technique that uses the nonlinear oscillations of microbubbles when exposed to ultrasound at high pressures transmitting at the fundamental frequency ie, f METHODS: Eight waveforms with different envelopes were ...
Dave, Jaydev K.   +11 more
core   +2 more sources

Mutual Coupling Reduction Using Ground Stub and EBG in a Compact Wideband MIMO-Antenna

open access: yesIEEE Access, 2021
This paper presents a compact, uni-planer wide band Multiple-Input-Multiple-Output (MIMO) antenna. The designed antenna array has a compact size of (26mm x 31mm) covering a wide frequency band from 3.1GHz - 11GHz.
Awais Khan   +3 more
doaj   +1 more source

Mutual Coupling Reduction in Closely Spaced MIMO Dielectric Resonator Antenna in H-Plane Using Closed Metallic Loop

open access: yesIEEE Access, 2022
In this study, the mutual coupling in multiple-input-multiple-output (MIMO) dielectric resonator antenna (DRA) is reduced by employing closed metallic loops. The loops are wrapped around the adjacent edges of the dielectric resonators (DR) where magnetic
Manzoor Elahi   +3 more
doaj   +1 more source

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