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Your search keyword '"Xu, Dongling"' showing total 47 results
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47 results on '"Xu, Dongling"'

1. Unified Statistical Channel Modeling and performance analysis of Vertical Underwater Wireless Optical Communication Links considering Turbulence-Induced Fading

Author

Xu, Dongling, Yi, Xiang, Ata, Yalçn, Tao, Xinyue, Li, Yuxuan, and Yue, Peng

Subjects
Electrical Engineering and Systems Science - Signal Processing, Physics - Optics
Abstract

The reliability of a vertical underwater wireless optical communication (UWOC) network is seriously impacted by turbulence-induced fading due to fluctuations in the water temperature and salinity, which vary with depth. To better assess the vertical UWOC system performances, an accurate probability distribution function (PDF) model that can describe this fading is indispensable. In view of the limitations of theoretical and experimental studies, this paper is the first to establish a more accurate modeling scheme for wave optics simulation (WOS) by fully considering the constraints of sampling conditions on multi-phase screen parameters. On this basis, we complete the modeling of light propagation in a vertical oceanic turbulence channel and subsequently propose a unified statistical model named mixture Weibull-generalized Gamma (WGG) distribution model to characterize turbulence-induced fading in vertical links. Interestingly, the WGG model is shown to provide a perfect fit with the acquired data under all considered channel conditions. We further show that the application of the WGG model leads to closed-form and analytically tractable expressions for key UWOC system performance metrics such as the average bit-error rate (BER). The presented results give valuable insight into the practical aspects of development of UWOC networks.

Published
2023

22. Studies on the Binding of DNA with the Inclusion of Brilliant Green inside the Cavity of γ-Cyclodextrin

Author

Wang Xinming and Xu Dongling

Subjects
brilliant green, γ-cyclodextrin, spectrometric, interaction, Chemical engineering, TP155-156, Chemistry, QD1-999
Abstract

The interaction of brilliant green with herring sperm DNA was investigated in detail by spectrometric methods in γ-cyclodextrin systems. On the condition of physiological pH, brilliant green prefers to form the 1:1 inclusion complex with γ-cyclodextrin.All the evidences indicated that the binding modes between γ-cyclodextrin-brilliant green and DNA were grooving binding and partial non-classical intercalative binding. The binding ratio of the inclusion complex with DNA is 6:1. The calculated thermodynamic parameters suggested that the binding of the inclusion complex to DNA was driven mainly by entropy.

Published
2013

36. A Quantitative Approach for Reliability Evaluation of Safety I&C Systems in Nuclear Power Plants

Author

Hu Xiaoying, Xu Dongling, Zhang Shuhui, and Liu Dongxu

Subjects
business.industry, Computer science, Algebra over a field, Nuclear power, Risk based design, business, Reliability (statistics), Reliability engineering
Abstract

The probability that the safety I&C system fails to actuate or advertently actuates RT or ESF functions, in part, essentially determines whether a nuclear power plant could operate safely and efficiently. Since more conservative assumptions and simplifications are introduced during the analysis, this paper achieves solid results by performing the modeling and calculation based on a relatively simple approach, the reliability block diagram (RBD) method. A typical safety I&C platform structure is involved in the model presented in this paper. From the perspective of conservation and simplicity, some assumptions are adopted in this paper. A group of formulas is derived in this paper based on Boolean algebra, probability theory, basic reliability concepts and equations, to facilitate the calculations of probabilities that the safety I&C system fails to actuate or advertently actuates RT or ESF functions. All the inputs of the analysis and calculation in this paper, which includes the I&C platform structure, the constitution of the hardware modules, and reliability data, are referenced to the nuclear power plant universal database where applicable. Although the conclusion drawn in the paper doesn’t apply to the I&C platform assessment for a specific plant, the method of modeling and process of analysis provides an illustration of an alternative quantitative reliability assessment approach for a typical safety I&C system installed in the nuclear power plant.

Published
2017

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