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317 results on '"Liu, Yi-Xin"'

17. Effect of Ultrasonic Deep Rolling on High-Frequency and Ultrasonic Fatigue Behavior of TC4

Author

Liu, Yi-Xin, Jia, Yun-Fei, Zhang, Xian-Cheng, Li, H., Wang, Run-Zi, Tu, Shan-Tung, Correia, José A.F.O., Series Editor, De Jesus, Abílio M.P., Series Editor, Ayatollahi, Majid Reza, Advisory Editor, Berto, Filippo, Advisory Editor, Fernández-Canteli, Alfonso, Advisory Editor, Hebdon, Matthew, Advisory Editor, Kotousov, Andrei, Advisory Editor, Lesiuk, Grzegorz, Advisory Editor, Murakami, Yukitaka, Advisory Editor, Carvalho, Hermes, Advisory Editor, Zhu, Shun-Peng, Advisory Editor, Fernandes, António Augusto, editor, and Calçada, Rui, editor

Published
2019
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26. A fast correction method of the scattering contributions in the area gamma dosemeter calibration field.

Author

Qian, Yi-kun, Zhang, Song, Mao, Ben-jiang, and Liu, Yi-xin

Subjects
MONTE Carlo method, CALIBRATION, SUPPORT vector machines, LEAST squares
Abstract

In the calibration procedure of area gamma dosemeters, how to accurately evaluate and correct the scattering contribution from the complex environmental factors to the point of test is the key problem to ensure the calibration accuracy. This paper proposed a fast correction method of the scattering contributions in the area gamma dosemeter calibration field. First, Monte Carlo method is employed to simulate the influence of scattering caused by different environmental factors in the calibration field, which is named as semi-panoramic reference radiation field. Then, a prediction model of the relationship between environmental factors and environmental scattering contribution is constructed based on the simulation data through the least squares support vector machine. With the model, the scattering contribution from the environmental factors can be fast estimated to correct the calibration results of the area gamma dosemeters, which will improve the accuracy of the calibration. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Composition Waves in Solution‐Processed Organic Films and Its Propagations from Kinetically Frozen Surface Mesophases.

Author

Yu, Jinde, Shen, Zichao, Lu, Wanlong, Zhu, Yuanwei, Liu, Yi-Xin, Neher, Dieter, Koch, Norbert, and Lu, Guanghao

Subjects
ORGANIC thin films, PHASE transitions, LIQUID films, EVAPORATION (Chemistry), PHOTOVOLTAIC cells, FIELD-effect transistors, THAWING
Abstract

Organic thin films deposited from solution attract wide interest for next‐generation (opto‐)electronic and energy applications. During solvent evaporation, the phase evolution dynamics for different components at different locations are not synchronic within the incrementally concentrated liquid films, determining the final anisotropic morphology and performance. Herein, by examining tens of widely investigated optoelectronic organic films, the general existence of composition wave propagating along the surface‐normal direction upon solidification is identified. The composition wave is initiated by a few nanometers thick surface mesophase kinetically forming at the foremost stage of phase transition, and afterward propagates toward the substrate during solvent evaporation. The composition waves exhibit well‐defined wave properties, including spatial wavelength, period, amplitude, and propagation velocity. These wave properties are closely correlated with the evaporation rate and the diffusion rate of organic molecules, which determines the dynamically varied local composition gradient along the surface‐normal direction. Such composition waves are commonly found for more than 80% of randomly examined solution‐processed thin films for high‐performance organic electronic devices including photovoltaic cells and field‐effect transistors. [ABSTRACT FROM AUTHOR]

Published
2023
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