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Dynamics of a stochastic rumor propagation model incorporating media coverage and driven by Lévy noise

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Chinese Physics B 2021年第8期30卷 182-190页

作者： Liang-An Huo Ya-Fang Dong ting-ting lin Business School University of Shanghai for Science and TechnologyShanghai 200093China School of Electrical and Information Engineering Shanghai Jiao Tong UniversityShanghai 200240China

With the development of information technology,rumors propagate faster and more widely than in the *** this paper,a stochastic rumor propagation model incorporating media coverage and driven by Lévy noise is *** global positivity of the solution process is proved,and further the basic reproductive number R_(0) is *** R_(0)1,the rumor will keep spreading and the system will oscillate randomly near the rumor equilibrium point of the deterministic *** results show that the oscillation amplitude is related to the disturbance of the *** addition,increasing media coverage can effectively reduce the final spread of ***,the above results are verified by numerical simulation.

关键词： rumor propagation stochastic process Lévy jump media coverage

NaOH–ball-milled co-modified magnetic biochar and its oil adsorption properties

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Particuology 2023年第12期83卷 40-49页

作者： Zehua Wei Haihong Li Miaomiao Jia ting lin School of Environmental and Chemical Engineering Xi'an Polytechnic UniversityXi'an710048China

A magnetic biochar adsorbent(BM–OH–BC)was prepared through NaOH–ball milling co-modification with walnut shells as the raw material,and its oil adsorption characteristics were *** adsorption properties of oil pollutants were compared before and after the NaOH-ball-milling co-modification,and the mechanism of NaOH-ball-milling on oil pollutants was investigated by scanning electron microscope-energy dispersive X-ray spectroscopy,BET,X-ray photoelectron spectroscopy and Fourier transform infrared *** experimental results showed that the oil adsorption capacity of BM–OH–BC can reach 2.75 g/g,which is 129%higher than that of unmodified ***,after five adsorption and desorption cycles,the adsorption rate of BM–OH–BC only decreased by 5.9%,which was because the oil adsorption of BM–OH–BC is mainly chemical *** adsorption processes involving single layer,heterogeneous phase and multilayer made BM–OH–BC have excellent adsorption *** biochar co-modification,the specific surface area of BM–OH–BC increased to 466 m^(2)/g,the total pore volume increased to 0.245 cm^(3)/g,the average pore size decreased to1.90 nm,and the number of hydrophobic non-polar functional groups increased,leading to the enhancement of its oil absorption *** study provides a reference for the treatment of oil-contaminated water bodies.

关键词： Biochar Oil pollution Adsorptionproperties Modificationmechanism

Low-Brightness Object Recognition Based on Deep Learning

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Computers, Materials & Continua 2024年第5期79卷 1757-1773页

作者： Shu-Yin Chiang ting-Yu lin Department of Information and Telecommunications Engineering Ming Chuan UniversityTaoyuan City333Taiwan

This research focuses on addressing the challenges associated with image detection in low-light environments,particularly by applying artificial intelligence techniques to machine vision and object recognition *** primary goal is to tackle issues related to recognizing objects with low brightness *** this study,the Intel RealSense Lidar Camera L515 is used to simultaneously capture color information and 16-bit depth information *** detection scenarios are categorized into normal brightness and low brightness *** the system determines a normal brightness environment,normal brightness images are recognized using deep learning *** low-brightness situations,three methods are proposed for *** first method is the SegmentationwithDepth image(SD)methodwhich involves segmenting the depth image,creating amask from the segmented depth image,mapping the obtained mask onto the true color(RGB)image to obtain a backgroundreduced RGB image,and recognizing the segmented *** second method is theHDVmethod(hue,depth,value)which combines RGB images converted to HSV images(hue,saturation,value)with depth images D to form HDV images for *** third method is the HSD(hue,saturation,depth)method which similarly combines RGB images converted to HSV images with depth images D to form HSD images for *** experimental results,in normal brightness environments,the average recognition rate obtained using image recognition methods is 91%.For low-brightness environments,using the SD method with original images for training and segmented images for recognition achieves an average recognition rate of over 82%.TheHDVmethod achieves an average recognition rate of over 70%,while the HSD method achieves an average recognition rate of over 84%.The HSD method allows for a quick and convenient low-light object recognition *** research outcome can be applied to nighttime surveillance systems or nighttime road safety systems

关键词： Low-brightness depth image image segmentation image recognition HDV HSD

Supply Chain Network Equilibrium with Revenue Sharing Contract under Demand Disruptions

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International Journal of Automation and computing 2011年第2期8卷 177-184页

作者： A-ting Yang lin-Du Zhao Institute of Systems Engineering Southeast University Nanjing 210096 PRC

Contract is a common and effective mechanism for supply chain coordination,which has been studied extensively in recent *** a supply chain network model,contracts can be used to coordinate it because it is too ideal to obtain the network equilibrium state in practical market *** order to achieve equilibrium,we introduce revenue sharing contract into a supply chain network equilibrium model with random demand in this ***,we investigate the influence on this network equilibrium state from demand disruptions caused by unexpected *** demand disruptions happen,the supply chain network equilibrium state will be broken and change to a new one,so the decision makers need to adjust the contract parameters to achieve the new coordinated state through ***,a numerical example with a sudden demand increase as a result of emergent event is provided for illustrative purposes.

关键词： Supply chain network equilibrium revenue sharing contract demand disruptions coordination.

NUMERICAL SIMULATION OF SOLITARY WAVE RUN-UP AND OVER-TOPPING USING BOUSSINESQ-TYPE MODEL

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Journal of Hydrodynamics 2012年第6期24卷 899-913页

作者： TSUNG Wen-Shuo HSIAO Shih-Chun lin ting-Chieh Department of Hydraulic and Ocean Engineering National Cheng Kung University Tainan Hydraulics Laboratory National Cheng Kung University

In this article, the use of a high-order Boussinesq-type model and sets of laboratory experiments in a large scale flume of breaking solitary waves climbing up slopes with two inclinations are presented to study the shoreline behavior of breaking and non-breaking solitary waves on plane slopes. The scale effect on run-up height is briefly discussed. The model simulation capability is well validated against the available laboratory data and present experiments. Then, serial numerical tests are conducted to study the shoreline motion correlated with the effects of beach slope and wave nonlinearity for breaking and non-breaking waves. The empirical formula proposed by Hsiao et al. for predicting the maximum run-up height of a breaking solitary wave on plane slopes with a wide range of slope inclinations is confirmed to be cautious. Furthermore, solitary waves impacting and overtopping an impermeable sloping seawall at various water depths are investigated. Laboratory data of run-up height, shoreline motion, free surface elevation and overtopping discharge are presented. Comparisons of run-up, run-down, shoreline trajectory and wave overtopping discharge are made. A fairly good agreement is seen between numerical results and experimental data. It elucidates that the present depth-integrated model can be used as an efficient tool for predicting a wide spectrum of coastal problems.

关键词： Boussinesq equations solitary wave run-up shoreline scale effect overtopping

Distributed Resource Allocation via Accelerated Saddle Point Dynamics

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IEEE/CAA Journal of Automatica Sinica 2021年第9期8卷 1588-1599页

作者： Wen-ting lin Yan-Wu Wang Chaojie Li Xinghuo Yu School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074 Key Laboratory of Image Processing and Intelligent Control Ministry of EducationHuazhong University of Science and TechnologyWuhan 430074China School of Electrical Engineering and Telecommunications University of New South WalesSydney NSW 2052Australia School of Engineering Royal Melbourne Institute of Technology(RMIT University)Melbourne VIC 3000Australia

In this paper,accelerated saddle point dynamics is proposed for distributed resource allocation over a multi-agent network,which enables a hyper-exponential convergence ***,an inertial fast-slow dynamical system with vanishing damping is introduced,based on which the distributed saddle point algorithm is *** dual variables are updated in two time scales,i.e.,the fast manifold and the slow *** the fast manifold,the consensus of the Lagrangian multipliers and the tracking of the constraints are pursued by the consensus *** the slow manifold,the updating of the Lagrangian multipliers is accelerated by inertial ***-exponential stability is defined to characterize a faster convergence of our proposed algorithm in comparison with conventional primal-dual algorithms for distributed resource *** simulation of the application in the energy dispatch problem verifies the result,which demonstrates the fast convergence of the proposed saddle point dynamics.

关键词： Accelerated saddle point dynamic distributed resource allocation hyper-exponential stability power dispatch

Domain Wall Evolution in Hf_(0.5)Zr_(0.5)O_(2)Ferroelectrics under Field-Cycling Behavior

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Research 2023年第4期6卷 415-423页

作者： Sirui Zhang Qinghua Zhang Fanqi Meng ting lin Binjian Zeng lin Gu Min Liao Yichun Zhou School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710071China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

HfO_(2)-based ferroelectrics have evoked considerable interest owing to the complementary metal-oxide semiconductor compatibility and robust ferroelectricity down to a few unit ***,the unique wake-up effect of HfO_(2)-based ferroelectric films severely restricts the improvement of their *** particular,the domain structure is an important characteristic of ferroelectric materials,which still has not been well understood in HfO_(2)-based *** this work,a Hf_(0.5)Zr_(0.5)O_(2) ferroelectric thin film is grown on a typical Si substrate buffered with TiN *** 90°domains of the Pca21 ferroelectric phase with head-to-tail and tail-to-tail structures can be observed by Cs-corrected scanning transmission electron microscope under their pristine *** waking up,the 180°domain is displayed in the ferroelectric *** remarkable differences in domain walls for 90°and 180°domains are characterized by qualitatively mapping the polarization distributions at the atomic *** domain wall changes from the[101]of the Hf_(0.5)Zr_(0.5)O_(2) film to the[001]of the Hf_(0.5)Zr_(0.5)O_(2) *** result provides fundamental information for understanding the domain structure of HfO_(2)-based ferroelectrics.

关键词： ferroelectric film walls

Selectivity regulation of CO_(2)electroreduction on asymmetric AuAgCu tandem heterostructures

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Nano Research 2022年第9期15卷 7861-7867页

作者： Yating Zhu Zengqiang Gao Zhicheng Zhang ting lin Qinghua Zhang Huiling Liu lin Gu Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Quantum Matter Beijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin Key Laboratory of Advanced Functional Porous MaterialsTianjin University of TechnologyTianjin 300384China

Rational design and synthesis of multimetallic nanostructures(NSs)are fundamentally important for electrochemical CO_(2)reduction reaction(CO_(2)RR).Herein,a multi-step seed-mediated growth method is applied to synthesize asymmetric AuAgCu heterostructures using Au nanobipyramids as nucleation seeds,in which their composition and structures are well *** find that the selectivity of C_(2)products for CO_(2)RR could be effectively regulated by tandem catalysis and electronic effect over trimetallic AuAgCu ***,the Faraday efficiency toward ethanol could reach up to 37.5%at a potential of−0.8 V versus reversible hydrogen electrode over asymmetric Au1Ag1Cu5 heterostructures with segregated domains of three constituent *** work provides an efficient strategy for the synthesis of multicomponent architectures to boost their promising application in CO_(2)RR.

关键词： CO_(2)reduction electrocatalysis tandem catalysis multimetallic nanostructure asymmetric heterostructure

Spectral Features of Soil Organic Matter

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Geo-Spatial Information Science 2009年第1期12卷 33-40页

作者： HE ting WANG Jing lin Zongjian CHENG Ye Key Laboratory of Land Use Ministry of Land and Resources 37 Guanyin~uanxiqu Xicheng District Beijing lO0035China.

The study on soil spectral reflectance features is the physical basis for soil remote sensing. Soil organic matter content influences the soil spectral reflectance dramatically. This paper studied the spectral curves between 400 nm-2500 nm of 174 soil samples which were collected in Hengshan county and Yixing county. Fourteen types of transformations were applied to the soil reflectance R to remove the noise and to linearize the correlation between reflectance （independent vari- able） and soil organic matter （SOM） content （dependent variable）. Then, the methods such as derivative spectrum technology and stepwise regression analysis, were applied to study the relationship between these soil spectral features and soil organic matter content. It shows that order 1 derivative of the logarithm of reflectance （01DLA） is the most sensitive to SOM among the various transform types of reflectance in consideration. The regression model whose coefficient of determination reaches 0.885 is built. It predicted the soil organic matter content with higher effect.

关键词： soil organic matter (SOM) spectral features stepwise regression analysis