Výsledky vyhledávání - "Ngoc Thach, Le"

A new method for locating and quantifying damage in beams from static deflection changes

Autor: Andy Nguyen, David Thambiratnam, Tommy H.T. Chan, Ngoc Thach Le

Publikováno v: Engineering Structures. 180:779-792

This paper presents a new method that can locate and quantify damage in Euler-Bernoulli beams from changes in static deflection. Using the principle of Virtual Work, for the first time, the deflection change (DC) parameter is formulated as a function

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::963d5c487088efc5dde8e051c76d72ac
https://doi.org/10.1016/j.engstruct.2018.11.071

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Fast and Efficient Hantzsch Synthesis Using Acid-Activated and Cation-Exchanged Montmorillonite Catalysts under Solvent-Free Microwave Irradiation Conditions

Autor: Giang Vo-Thanh, Duc Dung Pham, Ngoc Thach Le

Publikováno v: ChemistrySelect. 2:12041-12045

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56ee82d12c29f3789d468aad095dec8b
https://doi.org/10.1002/slct.201702681

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Locating and Quantifying Damage in Beam-like Structures Using Modal Flexibility-based Deflection Changes

Autor: David Thambiratnam, Tung Khuc, Ngoc Thach Le, Tommy H.T. Chan, Andy Nguyen

Publikováno v: International Journal of Structural Stability and Dynamics. 20:2042008

This paper presents an enhanced method to locate and quantify damage in beam-like structures using changes in deflections estimated from modal flexibility (MF) matrices. The method is developed from explicit relationship between a series of MF-based

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::174d04e0c4ec832bd43e52f34cb57f80
https://doi.org/10.1142/s0219455420420080

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Selective Dealkylations of Alkyl Aryl Ethers in Heterogeneous Basic Media under Microwave Irradiation

Autor: André Loupy, Le Ngoc Thach Le Ngoc Thach, A. Oussaid

Publikováno v: Tetrahedron Letters. 38:2451-2454

Ethyl isoeugenol and 2-ethoxyanisole could be selectively deethylated using potassium t-butoxide in the presence of crown ether under solvent-free conditions. By addition of ethylene glycol, selectivity was reversed to demethylation. In both cases, s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71634533818d76b4da80e2007038b6fa
https://doi.org/10.1016/s0040-4039(97)00366-3

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Further Improvements in Isomerization of Olefins in Solvent-Free Conditions

Autor: Le Ngoc Thach Le Ngoc Thach, B. B. Singh, Duong Lieu Hanh, André Loupy, Nguyen Ba Hiep, A. S. Radhakrishna

Publikováno v: Synthetic Communications. 23:1379-1384

Isomerization of safrole and ethyleugenol are performed quasi-quantitatively within 5 minutes at 80°C using KOH or KOtBu and catalytic amount of transfer agent in the absence of solvent. Transfer agent can be avoided in the case of KOtBu with eventu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe0f18889a8e14936410e2ba8d8eb3e2
https://doi.org/10.1080/00397919308011226

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