Výsledky vyhledávání

The structural transition under densification and the relationship between structure and density of silica glass

Autor: Nguyen Van Hong, N. V. Yen, Pham Khac Hung, L.T. Vinh, M. V. Dung

Publikováno v: The European Physical Journal B. 92

The structure of silica glass (SiO2) at different densities and at temperatures of 500 K is investigated by molecular dynamics simulation. Results reveal that at density of 3.317 g/cm3, the structure of silica glass mainly comprises two phases: SiO4-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5cdf396435c788b357e4ef15cd504bb6
https://doi.org/10.1140/epjb/e2019-100137-7

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Linear quadratic optimal control system design by Chebyshev-based state parameterization

Autor: Nagurka, Mark L., Ssu-Kei Wang, V Yen, Carnegie Mellon University.Engineering Design Research Center.

"A Chebyshev-based representation of the state vector is proposed for designing optimal control trajectories of unconstrained, linear, dynamic systems with quadratic performance indices. By approximating each state variable by a finite-term, shifted

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce85b2bfb3ca869bb2a210598b62a662

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Coordination and polyamorphism of aluminium silicate under high pressure: insight from analysis and visualization of molecular dynamics data

Autor: Pham Khac Hung, Nguyen Van Hong, Mai Thi Lan, N. V. Yen

Publikováno v: Canadian Journal of Physics. 92:1573-1580

The amorphous aluminium silicate (Al2O3)·2(SiO2) (abbreviated as AS2) is investigated using a molecular dynamics simulation with the Born–Mayer potential. The models of amorphous AS2 are constructed in a wide pressure range. The results show that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f61e22ebfcb64a55475bafc3376b0a46
https://doi.org/10.1139/cjp-2014-0042

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Akademický článek

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Prediction of concrete compression strength using ultrasonic pulse velocity

Autor: V. Yen Lei, I. M. Pauzi, M. N. Azreen, I. Nasharuddin, M. M. Haniza, A. D. Karsono, J. Akasyah

Publikováno v: AIP Conference Proceedings.

The relationship of ultrasonic stress waves transmitted along direct and indirect paths in concrete samples was investigated. Tests were conducted on plain concrete slabs from different grades of 15, 25, 30, 40 and Ultrahigh Performance Concrete that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cdc3629a36507f629bc9361ff4ecc7fc
https://doi.org/10.1063/1.4940092

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Relationships between Beta-Amyloid and Functional Connectivity in Different Components of the Default Mode Network in Aging

Autor: Michael D. Greicius, Irene V. Yen, Susan H. Onami, Andre Smiljic, Gil D. Rabinovici, Amynta O. Hayenga, Elizabeth C. Mormino, Mustafa Janabi, Bruce L. Miller, Cindee Madison, William J. Jagust, Suzanne L. Baker

Publikováno v: Cerebral Cortex. 21:2399-2407

Although beta-amyloid (Aβ) deposition is a characteristic feature of Alzheimer's disease (AD), this pathology is commonly found in elderly normal controls (NC). The pattern of Aβ deposition as detected with Pittsburgh compound-B positron emission t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::632704330a42ee72d23c029970889064
https://doi.org/10.1093/cercor/bhr025

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Structural properties of liquid aluminosilicate with varying Al2O3/SiO2 ratios: Insight from analysis and visualization of molecular dynamics data

Autor: Mai Thi Lan, L.T. Vinh, Nguyen Van Hong, N. V. Yen

Publikováno v: Modern Physics Letters B. 31:1750036

Molecular dynamics (MD) simulations and visualizations were explored to investigate the changes in structure of liquid aluminosilicates. The models were constructed for four compositions with varying Al2O3/SiO2 ratio. The local structure and network

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8f332bfafdc250587c3c4fefe6684004
https://doi.org/10.1142/s0217984917500361

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An inverse dynamics-based dynamic programming method for optimal control problems of linear systems

Autor: Tsong-Zen Liu, Chen-Wen V. Yen

Publikováno v: Optimal Control Applications and Methods. 19:363-370

In solving optimal control problems, the conventional dynamic programming method often requires interpolations to determine the optimal control law. As a consequence, interpolation errors often degenerate the accuracy of the conventional dynamic prog

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f219449d5ad227bd93588d7349909623
https://doi.org/10.1002/(sici)1099-1514(199809/10)19:5<363::aid-oca635>3.0.co

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