Results 1 to 10 of about 505,512 (306)

Effect of the frequency spacing on modal damping estimation of a double-layer grid [PDF]

open access: yesمهندسی عمران شریف, 2021
Although natural frequencies and mode shapes can be accurately measured by dynamic tests, error bounds in values of damping estimation can be large. Since damping strongly influences the design and control of structures, efforts are made to find the ...
S. Salehi   +2 more
doaj   +1 more source

A corpus-based study of modal verbs in Chinese–English governmental press conference interpreting

open access: yesFrontiers in Psychology, 2022
This study investigates the use of modal verbs in Chinese–English government press conference (GPC) interpretation. Modal verbs mark the speaker’s opinion of or attitude toward the event described in a sentence.
Yifan Zhang, Andrew K. F. Cheung
doaj   +1 more source

Damage Identification in Steel Beam Structures Based on the Comparison of Analytical Results of Wavelet Analysis [PDF]

open access: yesپژوهش‌های زیرساخت‌های عمرانی, 2023
Numerous researchers focus on monitoring the health of structures to ensure safety and reduce maintenance costs. Beams and columns are the primary elements of structures in civil engineering, and designers expect beams and columns to be the last elements
Mohtasham Khanahmadi   +3 more
doaj   +1 more source

Deep Adversarial Learning Triplet Similarity Preserving Cross-Modal Retrieval Algorithm

open access: yesMathematics, 2022
The cross-modal retrieval task can return different modal nearest neighbors, such as image or text. However, inconsistent distribution and diverse representation make it hard to directly measure the similarity relationship between different modal samples,
Guokun Li   +6 more
doaj   +1 more source

Estimation of Damping for a Double-Layer Grid Using Input-Output and Output-Only Modal Identification Techniques [PDF]

open access: yesCivil Engineering Infrastructures Journal, 2020
In large civil engineering structures, the output-only modal identification is the most applicable technique for estimating the modal parameters such as damping.
Sajjad Salehi   +2 more
doaj   +1 more source

Study on Physical-mechanical Parameters of Ring-, Rotor- and Air-jet-spun Modal and Micro Modal Yarns [PDF]

open access: yesTekstilec, 2019
The main physical-mechanical parameters of modal yarns (unevenness, faults, hairiness and spectrograms) were compared with the parameters of micro modal yarns of the same fineness and end-use.
Zenun Skenderi   +3 more
doaj   +1 more source

Long-Term Prediction of Particulate Matter2.5 Concentration with Modal Autoformer Based on Fusion Modal Decomposition Algorithm

open access: yesAtmosphere, 2023
To overcome the limitations of long-term prediction of PM2.5 concentration, a multi-factor information flow causality analysis method is used to screen suitable meteorological and air pollutant-related factors and concatenate them with a PM2.5 sequence ...
Shiyu Zhou   +6 more
doaj   +1 more source

Generalized modal reduction method for the dynamic analysis of rotating mechanical systems

open access: yesApplied and Computational Mechanics, 2020
The paper proposes modal reduction method of the dynamic systems composed of linear nonconservative subsystems coupled by nonlinear discrete couplings.
Zeman V., Hlaváč Z.
doaj   +1 more source

Identification and comparative analysis of vibration modal parameters of rice planter frame

open access: yesAIP Advances, 2023
Modal parameter analysis is a common method for structural characteristic analysis. To accurately identify the modal parameters that describe the vibration characteristics of the structure, the chassis frame of the rice transplanter is taken as the ...
Kaikang Chen   +7 more
doaj   +1 more source

Comparison of the continuous model and the finite element model of the gantry crane carrying structure for modal analysis

open access: yesVojnotehnički Glasnik, 2022
Introduction/purpose: To study the adequacy of applying numerical methods in the modal analysis of complex carrying structures of cranes. Methods: Comparative application of the analytical method and the numerical method - FEM.
Rade R. Vasiljević
doaj   +1 more source

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