Review
Optics
Luiz Felipe Votto, Abdelghani Chafiq, Gerard Gouesbet, Leonardo Andre Ambrosio, Abdelmajid Belafhal
Summary: The Ince-Gaussian beams are included in the framework of the generalized Lorenz-Mie theory through their expansions in terms of Laguerre-Gaussian beams. The beam shape coefficients are derived based on the expressions of Laguerre-Gaussian beam shape coefficients. This allows for a more straightforward computation of the coefficients and an analysis of the implications of the finite series method in the context of the GLMT framework.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2023)
Article
Optics
Leonardo A. Ambrosio, Jhonas O. de Sarro, Gerard Gouesbet
Summary: This study derives a polychromatic version of the generalized Lorenz-Mie theory stricto sensu (GLMT) by expanding arbitrary time-dependent fields into partial waves using Bromwich scalar potentials. The new formalism introduces field shape spectra (FSSs) which are intrinsically frequency-dependent, modifying and redefining the physical quantities expressed in the monochromatic GLMT.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Optics
Luiz Felipe Machado Votto, Gerard Gouesbet, Leonardo Andre Ambrosio
Summary: Due to recent developments in generalized Lorenz-Mie theories (GLMTs), there is a renewed interest in the finite series (FS) method. However, the lack of flexibility in its earlier statements has led to its neglect since the 1990s. By dissecting the later works and exploring possibilities for generalization, simplification, and organization, a more accessible formulation of the FS method has been proposed.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2023)
Article
Optics
Leonardo Andre Ambrosio, Jiajie Wang, Gerard Gouesbet
Summary: Based on the adjoint boundary value problem proposed by Zulehner and Rohatschek [1] decades ago, analytic and closed-form expressions for the photophoretic forces exerted by arbitrary-shaped beams on homogeneous and low-loss spherical particles are derived in both the free molecular and slip flow regimes. The asymmetry vector for arbitrary refractive index particles is explicitly calculated by expanding the internal electromagnetic fields using the generalized Lorenz-Mie theory (GLMT). The proposed approach is the first systematic attempt to incorporate GLMT into the field of photophoresis and may be extended to spheroids and find important applications in optical trapping and manipulation of microparticles, geoengineering, particle levitation, optical trap displays, and other areas.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2022)
Article
Engineering, Electrical & Electronic
M. Arfan, N. Khaleel, A. Ghaffar, Y. Khan, I. Shakir
Summary: This paper presents an analysis of electromagnetic scattering by a perfect electromagnetic conductor (PEMC) sphere using Bessel beam incidence, based on the generalized Lorenz-Mie theory (GLMT). The PEMC is a generalization of the concept of perfect electric and perfect magnetic conductor (PEC and PMC). The scattering problem is solved by representing the Bessel beam fields as vector spherical wave functions (VSWFs) and solving linear equations obtained from the boundary conditions (BCs) of the PEMC sphere. The computed scattering cross-section (C-sca) and extinction cross-section (C-ext) are used to analyze the impact of the admittance parameter, conical angle, and sphere size parameter. Moreover, it is found that for a special case of a conical angle of 0 degrees, the numerical results of the scattering cross-section for Bessel beam and plane wave are the same.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Jianqi Shen, Haitao Yu
Summary: In this paper, a new quadrature method for determining the beam shape coefficients (BSCs) of shaped beams using azimuthal and radial integrals is presented. The method is outlined and validated using the tilted plane wave and Gaussian beam as examples. Numerical results show that the proposed method can be a powerful alternative tool for fast and rigorous calculations of BSCs in spherical particle scattering scenarios where analytical solutions are not feasible and numerical evaluations are necessary.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2023)
Article
Optics
Qingwei Duan, Jiajie Wang, Qiwei Li, Xiang'e Han, Kuan Fang Ren
Summary: This paper introduces the applications of the generalized Lorenz-Mie theory (GLMT) and the vectorial complex ray model (VCRM) in the interaction between beams and particles. By comparing the experimental results, it is found that VCRM performs well in Gaussian beam scattering problems, providing a new method for studying the scattering of shaped beams by large particles/objects of any shape.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2024)
Article
Physics, Applied
Aidan Rafferty, Thomas C. Preston
Summary: This study investigates trapping positions of weakly absorbing, spherical particles in a dual-beam optical trap, identifying four distinct trapping behavior regimes. The impact of beam offsetting and power imbalance between the two beams is evaluated, providing key insights into the workings of dual-beam optical traps. Experimental results demonstrate the possibility of fitting the evolution of particle trapping position to determine the particle's relative position to the focal point of each beam.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Optics
Shulamit Edelstein, Antonio Garcia-Martin, Pedro A. Serena, Manuel Marques
Summary: In this article, we use an exact method to study the fields scattered by a spherical magneto-optical particle and calculate the optical forces exerted on it. The resulting force and its components, namely the magneto-optical gradient force and magneto-optical extinction force, are presented analytically. We also derive analytical expressions for the scattering and extinction cross sections of the particle, which intuitively demonstrate the effect of circular dichroism in magneto-optical scattering and forces. Furthermore, we show that the magneto-optical extinction force is a result of circular dichroism in magneto-optical scattering, and the directional scattering is related to the force exerted on the particle.
Article
Engineering, Electrical & Electronic
M. Arfan, A. Ghaffar, Majeed. A. S. Alkanhal, Y. Khan, A. H. Alqahtani, I. Shakir
Summary: Generalized Lorenz-Mie theory (GLMT) is widely used to study the interaction between optical waves and environmental aerosols. In this study, the scattering of a Laguerre-Gaussian (LG) beam from a spherical marine aerosol particle is analyzed using the GLMT and complex source point method. Compared to plane waves or Gaussian beams, LG beams have more complex optical fields, resulting in different interactions with the target. By adjusting suitable parameters, the differential scattering cross-section caused by the marine aerosol particle can be tuned.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Leonardo A. Ambrosio, Gerard Gouesbet
Summary: This work analytically demonstrates that the dipole theory for longitudinal forces is in complete agreement with the Rayleigh limit of the generalized Lorenz-Mie theory. It is observed that only a few poles actually contribute to the force exerted on the scatterer.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Physics, Applied
Mohammad Mojtaba Sadafi, Achiles Fontana da Mota, Hossein Mosallaei
Summary: The study presents an analytical solution for the scattering from a particle made of a material with time-varying permittivity. Through the manipulation of the active medium's eigenvalues, precise control over the scattering characteristics of the particle is achieved. The results demonstrate the possibility of achieving unidirectional scattering by skillfully manipulating the eigenvalues of the dynamic material.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Fuping Wu, Jiajie Wang, Zecheng Cui, Samuel Aihoon, Paul Briard, Yiping Han
Summary: This paper presents a systematic theoretical investigation on the properties of photonic jets (PJs) generated by a micro-sized particle excited by a Bessel beam. The effects of illumination conditions on PJs are analyzed, revealing fascinating properties and potential applications in particle manipulation and super-resolution imaging.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2022)
Article
Optics
Jing Bai, Xuan Liu, Cheng-xian Ge, Zhen-sen Wu, Xiao-xiao Zhang
Summary: We studied the optical trapping force exerted on non-uniform chiral stratified spheres using a high-order Bessel beam. By comparing with existing reference, we validated the present theories. Numerical simulations considering various parameters showed that different chirality distributions significantly affect the trapping characteristics, and a stable three-dimensional capture can be achieved by selecting appropriate incident beam and particle parameters. These theoretical investigations offer an analytical method for understanding the interaction between light and more complex stratified chiral cells, thus providing an encouraging approach for designing better optical manipulation systems.
Article
Optics
Huan Tang, Han Sun, Renxian Li, Liu Yang, Ningning Song, Shu Zhang, Bojian Wei, Zitong Zhu, Bing Wei, Shuhong Gong, F. G. Mitri
Summary: This study analyzes the optical radiation force exerted on a homogeneous and lossless dielectric spherical particle by a polarized Airy beam using the generalized Lorenz-Mie theory. The transverse and longitudinal radiation force components are evaluated and simulated, showing that a polarized Airy beam can trap and guide the dielectric sphere. The parameters of the Airy beam and the size of the sphere affect the amplitude and distribution of the optical force components.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2022)
Article
Optics
Haihua Wang, Xianming Sun
OPTICS COMMUNICATIONS
(2020)
Article
Engineering, Chemical
Lei Wei, Song Chen, Xianming Sun, Yongliang Jin, Dan Jia, Jian Li, Haitao Duan
Summary: The study found that special oils and nonspecific oils had good similarity in oxidation onset temperature, but nonspecific oils showed the highest change rate in sulfation value. The change rate of Euclidean distance of two special oils was less than 8.48%, indicating greater stability compared to nonspecific oils. This research can be a valuable reference for end users in selecting motor oils and for oil developers in improving oil stability.
LUBRICATION SCIENCE
(2021)
Article
Engineering, Multidisciplinary
Tongtong Mu, Jin Shen, Mengjie Wang, John C. Thomas, Xinjun Zhu, Xi Yuan, Wei Liu, Xianming Sun, Yajing Wang, Jinzhuang Han, Zhenming Liu
Summary: The study shows that increasing flow velocity affects the recovery of particle size distribution via dynamic light scattering, particularly for unimodal and bimodal PSDs. Increasing velocity can lead to errors in peak position and broadening of PSD for unimodal PSD, and can result in a single-peak PSD for bimodal PSD. There is a correlation between velocity and signal noise in measurements, with larger particles having lower signal-to-noise ratio.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Ouyang Li, Guirong Yang, Wenming Song, Dawen Gao, Xianming Sun
Summary: Ni/WC/graphene oxide (GO) composite cladding fusion coatings were fabricated on medium carbon structure steel substrate through vacuum cladding technique, showing compact microstructure without cracks or inclusions. The main phases of the composite coatings include gamma-Ni solid solution, WC, Cr7C3, with improved corrosion resistance compared to the substrate.
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Computer Science, Cybernetics
Kung-Cheng Ho, Qian Wang, Xianming Sun, Leonard F. S. Wang
Summary: The study analyzes the relationship between CSR and corporate capital structure using CSR score data published by China's Hexun from 2010 to 2018. It finds that CSR can effectively reduce firm leverage and identifies investor attention and liquidity as the main channels through which CSR achieves this reduction. The research results also suggest that other influence channels in this relationship warrant further exploration.
Article
Economics
Qian Lin, Yulei Luo, Xianming Sun
Summary: This paper proposes a robust investment rule for selecting relatively safe assets and hedging with relatively risky assets. The study finds that when investors cannot differentiate the riskiness of two assets, they will equally invest in both assets. Moreover, investors will take long or short positions on the relatively risky asset if it can be used as a cross-hedging instrument, while it will not be traded if it cannot serve that purpose. These findings provide a unified explanation for under-diversification, home bias, and portfolio inertia in financial markets from a cross-hedging perspective.
JOURNAL OF ECONOMIC DYNAMICS & CONTROL
(2022)
Article
Engineering, Mechanical
Huaitao Shi, Yangyang Li, Xiaotian Bai, Ke Zhang, Xianming Sun
Summary: In this paper, a two-stage sound-vibration signal fusion algorithm is proposed to enhance fault diagnosis of rolling bearings. The algorithm combines fault features from multiple measuring points and reduces background noise interference.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Computer Science, Information Systems
Junqi Geng, Xinghua Liu, Xianming Sun, Peng Sun, Yan Liu, Xinye Gao
Summary: The study proposed the TL-SALSA algorithm combining Internet thinking and complex network theory to screen important transmission lines in electrical power systems, significantly improving screening efficiency and providing an effective method for preventing cascading failures in power systems.
MOBILE INFORMATION SYSTEMS
(2022)
Article
Materials Science, Coatings & Films
Lipeng Wang, Dacheng Zhang, Changzheng Chen, Hao Fu, Xianming Sun
Summary: In this study, a numerical model of laser cladding for the crankshaft journal was established using the finite element method. The results showed that laser cladding can improve the wear resistance of the crankshaft journal by analyzing the microstructure evolution and conducting a friction-wear test.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Economics
Xiaohang Ren, Ziwei Tong, Xianming Sun, Cheng Yan
Summary: By using a non-parametric method, the relationship between economic growth and energy consumption is empirically examined from both time and space perspectives. The study finds that the promotion effect of energy consumption on economic growth changes over time, and the non-parametric model captures this effect better. Additionally, classification based on carbon intensity suggests that energy efficiency should be improved in high-carbon development areas, while investment and innovation should be emphasized in low-carbon development areas.
Article
Engineering, Electrical & Electronic
Junqi Geng, Xianming Sun, Fei Li, Xu Wu
Summary: This paper proposes a method for predicting important nodes and transmission lines in an electrical power system based on K-means and Markov chain. The method uses historical data mining and prediction to forecast important nodes and transmission lines in the power system. Simulation results prove the effectiveness and rationality of this method.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Junqi Geng, Xianming Sun, Haihua Wang, Peng Sun, Xiaodong Jiang, Guang Yang, Wenxi Lv
Summary: In this paper, a method called Electrical Transmission Line-Stochastic Approach for Link Structure Analysis (ETL-SALSA) is proposed, which combines Internet thinking with the physical characteristics of the power system. The method can accurately screen important transmission lines and significantly improve the screening speed.
INTERNATIONAL JOURNAL OF EMERGING ELECTRIC POWER SYSTEMS
(2023)
Article
Economics
Xianming Sun, Shiyi Xiao, Xiaohang Ren, Bing Xu
Summary: Using a panel data of 63 countries from 1995 to 2017, we employ the local linear dummy variable estimation (LLDVE) method to investigate the time-varying net environmental impact of Information and Communication Technology (ICT). Our analysis reveals that, regardless of national income level, ICT increases CO2 emissions until 2004 but reduces them after 2008. We further show that the positive environmental impact of ICT on high-income countries is approximately 10 times greater than that on middle-income countries over time. These findings suggest that the development of ICT should be encouraged globally to mitigate carbon emissions, particularly in middle-income countries, considering the benefits of improved technology absorption rate in high-income countries.
Article
Engineering, Mechanical
Miao Tian, Xiaoming Su, Changzheng Chen, Yuanqing Luo, Xianming Sun
Summary: Due to the lack of labeled data on wind turbine bearings, a new wind turbine bearing fault diagnosis method based on a dynamic multi-adversarial adaptive network (DMAAN) was proposed. The method utilized laboratory data to obtain fault diagnosis models and involved evaluating distribution differences and reducing them through adversarial training. The validity of DMAAN was verified through transfer experiments, showing higher diagnostic accuracy and better transmission capability compared to existing methods.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaowei Song, Xianming Sun
FRESENIUS ENVIRONMENTAL BULLETIN
(2020)
