Results 71 to 80 of about 3,095,615 (291)

Practical Instantaneous Cable Tension Estimation for Monitoring of Cable-Stayed Bridges

Applied Sciences
This study proposes a practical framework for estimating instantaneous stay-cable tension in cable-stayed bridges based on the first-order frequency moment (FFM).
Jungwook Seo, Changsu Shim, Jongchil Park   +2 more
doaj   +1 more source

Pure frequency oscillations of semiconductor lasers with filtered optical feedback [PDF]

, 2005
A semiconductor laser subject to delayed filtered optical feedback can show pure frequency oscillations with a period of the order to the delay time, while the power remains practically constant.
B. Krauskopf, Lenstra, D.; id_orcid, Krauskopf, B., D. Lenstra, H. Erzgräber, Lenstra, D Daan, Lenstra, D, Erzgraber, H, Krauskopf, B, Erzgräber, H.   +9 more
core  

Fabrication Routes for Ionic Conducting Fiber Strain Sensors

Advanced Engineering Materials, EarlyView.
Ionic conducting fiber strain sensors (ICFSs) offer compliant, textile‐integrable sensing. Thus far, the commercialization of ICFSs has been constrained by fiber fabrication routes. This review provides a fabrication‐centric analysis of ICFSs correlating processing strategies with material properties and scalability.
Leo John Kershaw, Zhanhong Yang, Anne Ladegaard Skov, Magdalena Skowyra   +3 more
wiley   +1 more source

Problem of the instantaneous sound frequency measurement

Archives of Acoustics, 2015
This paper presents a method for the measurement of the so - called quasi-instantaneous frequency of acoustic signals, which is an approximation of the instantaneous frequency defined on the basis of theoretical considerations.
Edward OZIMEK, Lech JUGOWAR, Leon RUTKOWSKI   +2 more
doaj  

A combined kernel-based fuzzy C-means clustering and spectral centroid for instantaneous frequency estimation

Advances in Mechanical Engineering, 2020
An improved instantaneous frequency estimation algorithm for rotating machines based on a kernel-based fuzzy C-means clustering (KFCM) algorithm used in association with a spectral centroid algorithm is proposed in this study. The clustering algorithm is
Zhai Hua, Mao Hong-min, Wang Dong, Lu Xue-song, Ding Xu   +4 more
doaj   +1 more source

Matching Linear Chirplet Strategy-Based Synchroextracting Transform and Its Application to Rotating Machinery Fault Diagnosis

IEEE Access, 2020
Various time-frequency analysis methods have been employed for the vibration signal processing of rotating machinery under time-varying speeds. However, most methods suffer from time-frequency blurriness, particularly for signals experiencing fast ...
Zehui Hua, Juanjuan Shi, Zhongkui Zhu
doaj   +1 more source

Research of Instantaneous Frequency Measurement Receiver

2020 Dynamics of Systems, Mechanisms and Machines (Dynamics), 2020
В данной работе рассматривается двухканальный МИЧ-приемник с двумя линиями задержки. Проведя математическое моделирование МИЧ-приемника, были получены зависимости СКО оценки частоты от задержки при различных соотношениях С/Ш на входе. Также получена зависимость вероятности ошибочного определения зоны неоднозначности, приводящей к увеличению СКО оценки ...
M. A. Kvachev, P. I. Puzyrev, K. V. Semenov   +2 more
openaire   +1 more source

Influence of TiC and TiN Ceramic Reinforcements on the Microstructure, Thermal Expansion Behavior, and Tensile Properties of Invar 36 Manufactured by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This study examines Invar composites reinforced with titanium carbide (TiC) and titanium nitride (TiN) using laser powder bed fusion (LPBF). It presents the influence of reinforcements on microstructure, tensile properties, and thermal expansion. Results show that TiC effectively strengthens Invar while maintaining low thermal expansion, whereas TiN ...
Ayodeji Nathaniel Oyedeji, Natasha Sacks, Johannes Pötschke, Björn Matthey   +3 more
wiley   +1 more source

Rotary 3D Printing With Integrated Electroplating

Advanced Engineering Materials, EarlyView.
A rotary material extrusion platform integrates localized copper electroplating with printing and encapsulation to fabricate cylindrical polymer–metal structures containing fully embedded, low‐resistance conductive pathways that enable internal Joule heating and thermally activated shape‐memory responses.
Antonio Zagaria, Nicola Larovere, Moslem Mohammadi, Gianluca Percoco, Ali Zolfagharian, Gianni Stano   +5 more
wiley   +1 more source

Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids

Advanced Functional Materials, EarlyView.
This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow, Samya Sen, Joaquin Yus, Eliza E. Lovrich, Amanda G. Hoika, Kelly M. Chang, Arielle A. Pfeil, Nellie Haug, Amy J. Wagoner Johnson, Randy H. Ewoldt   +9 more
wiley   +1 more source