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Uncertain Opinion Evolution with Bounded Confidence Effects in Social Networks

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Journal of Systems Science and Systems Engineering 2019年第4期28卷 494-509页

作者： Min Zhan Haiming Liang Zhaogang ding Yucheng dong Business School Sichuan UniversityChengdu 610065 China School of Public Management Northwest University Xi'an 710069 China

When people express their opinions for an issue, they can express both exact opinions and uncertain opinions, such as numerical interval opinions. Moreover, social network is a crucial medium of opinion interaction and evolution. In this paper, uncertain opinion evolution with bounded confidence effects in social networks is investigated by theoretical demonstration and numerical examples analyses, and experiments simulations analyses. Theoretical results show when all the agents are with uncertainty tolerances, then the ratios of agents expressing uncertain opinions are impossible to decrease, even increase, as time increases;while when all the agents are without uncertainty tolerances, then the ratios of agents expressing uncertain opinions are impossible to increase, even decrease, as time increases. Moreover, the average widths of uncertain opinions are always smaller than the maximum opinion width of all the initial opinions among agents. Experiments simulations results show different ratios of agents with uncertainty tolerances and different ratios of agents expressing uncertain opinions have strong impact on the ratios of the agents expressing the uncertain opinions in the stable state, and the average widths of uncertain opinions in the stable state.

关键词： Opinion evolution uncertainty bounded confidence social network

THE APPLICATION OF COBB-DOUGLAS FUNCTION IN FORECASTING THE DURATION OF INTERNET PUBLIC OPINIONS CAUSED BY THE FAILURE OF PUBLIC POLICIES

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Journal of Systems Science and Systems Engineering 2018年第5期27卷 632-655页

作者： Xuefan dong Ying Lian ding Li Yijun Liu Institutes of Science and Development Chinese Academy of Sciences Beijing 100090 China University of Chinese Academy of Sciences Beijing 100190 China Institute of Development Southwest University of Finance and Economics Chengdu 610074 China

Gushes of Internet public opinions may trigger unexpected incidents that significantly affectsocial security and stability, especially for ones caused by the failure of public policies. Therefore,forecasting this kind of Interact public opinions is of great significance. The duration could be citedas one of the most direct indicators that can reflect the severity of a specific Internet public opinioncase. Based on this background, this paper aims to find the factors that may affect the duration of Internet public opinions, and accordingly proposes a model that can accurately predict the durationbefore the release of public policies. Specifically, an index system including 8 factors by consideringfour dimensions, namely, object, environment, reality （offline）, and the network （online）, isestablished. In addition, based on the dataset containing 23 typical Internet public opinion casescaused by the failure of public policies, 9 prediction models are gained by applying the multivariatelinear regression model, multivariate nonlinear regression model, and the Cobb-Douglas function.

关键词： Public policy internet public opinion multivariate linear regression model multivariatenonlinear regression model Cobb-Douglas production function

Pharmacological kinetics of BmK AS, a sodium channel site 4-specific modulator on Na_v1.3

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Neuroscience Bulletin 2012年第3期28卷 209-221页

作者： Zhi-Rui Liu Jie Tao Bang-qian dong Gang ding Zhi-Jun Cheng Hui-Qiong He Yong-Hua Ji Laboratory of Neuropharmacology and Neurotoxicology Shanghai University Shanghai 200444 China Xinhua Translational Institute for Cancer Pain Chongming Shanghai 202151 China

Objective In this study, the pharmacological kinetics of Buthus martensi Karsch （BmK） AS, a specific modulator of voltage-gated sodium channel site 4, was investigated on Nav1.3 expressed in Xenopus oocytes. Methods Two-electrode voltage clamp was used to record the whole-cell sodium current. Results The peak currents of Nav1.3 were depressed by BmK AS over a wide range of concentrations （10, 100, and 500 nmol/L）. Most remarkably, BmK AS at 100 nmol/L hyperpolarized the voltage-dependence and increased the voltage-sensitivity of steady-state activation/inactivation. In addition, BmK AS was capable of hyperpolarizing not only the fast inactivation but also the slow inactivation, with a greater preference for the latter. Moreover, BmK AS accelerated the time constant and increased the ratio of recovery in Nav1.3 at all concentrations. Conclusion This study provides direct evidence that BmK AS facilitates steady-state activation and inhibits slow inactivation by stabilizing both the closed and open states of the Nav1.3 channel, which might result from an integrative binding to two receptor sites on the voltage-gated sodium channels. These results may shed light on therapeutics against Nav1.3-targeted pathology.

关键词： VGSC subtype Nav1.3 VGSC site 4-specific modulator BmKAS

H_∞ fault estimation for a class of linear time-delay systems in finite frequency domain

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Journal of Systems Engineering and Electronics 2010年第5期21卷 835-841页

作者： Quanchao dong Maiying Zhong Steven X. ding School of Control Science and Engineering Shandong University Jinan 250061 E R. China School of Instrumentation Science and Opto-electronics Engineering Beihang University Beijing 100191 P. R. China Institute for Automatic Control and Complex Systems University of Duisburg-Essen Duisburg 47057 Germany

This paper deals with the problem of H∞ fault estimation for linear time-delay systems in finite frequency *** a generalized coordinate change is applied to the original system such that in the new coordinates all the time-delay terms are injected by the system＇s input and *** an observer-based H∞ fault estimator with input and output injections is proposed for fault estimation with known frequency *** the aid of Generalized Kalman-Yakubovich-Popov lemma,sufficient conditions on the existence of the H∞ fault estimator are derived and a solution to the observer gain matrices is obtained by solving a set of linear matrix ***,a numerical example is given to illustrate the effectiveness of the proposed method.

关键词： fault estimation time-delay generalized coordinate change generalized Kalman-Yakubovich-Popov lemma finite frequency domain.

Effect of Prior Cold Deformation on the Stability of Retained Austenite in GCr15 Bearing Steel

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Acta Metallurgica Sinica(English Letters) 2019年第1期32卷 107-115页

作者： Feng Wang dong-Sheng qian Xiao-Hui Lu School of Materials Science and Engineering Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive Engineering Wuhan University of Technology

In this work, the effect of prior cold deformation on the stability of retained austenite in GCr15 bearing steel was investigated after quenching and tempering treatment. The thermal stability was evaluated by calculating thermal activation energy for decomposition of retained austenite using differential scanning calorimeter. The mechanical stability was investigated according to the strain-induced martensitic transformation behavior of retained austenite under the standard compression testing. It is found that the prior cold deformation not only accelerates the carbide dissolution during the austenitization process but also contributes to the carbon partitioning in the tempering stage due to the higher density of phase boundaries, which results in the improvement of the thermal stability of retained austenite. Due to the enhanced carbide dissolution, the higher carbon content in the prior austenite will intensify the isotropic strain of martensitic transformation. As a consequence, the film-like retained austenite is likely to form under a higher hydrostatic pressure and thus shows a higher mechanical stability. Additionally, it is noteworthy that the benefits of the prior cold deformation to the stability of retained austenite would be saturated when the cold deformation degree is larger than 40%.

关键词： GCr15 bearing steel Prior cold deformation Retained austenite stability

The Extreme Mei-yu Season in 2020:Role of the Madden-Julian Oscillation and the Cooperative Influence of the Pacific and Indian Oceans

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Advances in Atmospheric Sciences 2021年第12期38卷 2040-2054页

作者： Ping LIANG Zeng-Zhen HU Yihui ding Qiwen qian Mitigation and Adaptation to Climate Change in Shanghai Shanghai Regional Climate CenterChina Meteorological AdministrationShanghai200030China Climate Prediction Center NCEP/NWS/NOAA5830 University Research CourtCollege ParkMD 20740USA National Climate Center China Meteorological AdministrationBeijing 100081China School of Atmospheric Sciences Nanjing University of Information Science&TechnologyNanjing 210044China

The middle and lower reaches of the Yangtze River in eastern China during summer 2020 suffered the strongest mei-yu since *** this work,we comprehensively analyzed the mechanism of the extreme mei-yu season in 2020,with focuses on the combined effects of the Madden-Julian Oscillation(MJO)and the cooperative influence of the Pacific and Indian Oceans in 2020 and from a historical *** prediction and predictability of the extreme mei-yu are further investigated by assessing the performances of the climate model operational predictions and *** is noted that persistent MJO phases 1−2 during June−July 2020 played a crucial role for the extreme mei-yu by strengthening the western Pacific subtropical *** the development of La Niña conditions and sea surface temperature(SST)warming in the tropical Indian Ocean exerted important influences on the long-lived MJO phases 1−2 by slowing down the eastward propagation of the MJO and activating convection related to the MJO over the tropical Indian *** spatial distribution of the 2020 mei-yu can be qualitatively captured in model real-time forecasts with a one-month *** can be attributed to the contributions of both the tropical Indian Ocean warming and La Niña ***,the mei-yu rainfall amounts are seriously *** simulations forced with observed SST suggest that internal processes of the atmosphere play a more important role than boundary forcing(e.g.,SST)in the variability of mei-yu anomaly,implying a challenge in quantitatively predicting an extreme mei-yu season,like the one in 2020.

关键词： 2020 extreme mei-yu MJO Indian Ocean La Niña prediction and predictability

Optimal risk allocation in alliance infrastructure projects: A social preference perspective

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Frontiers of Engineering Management 2022年第2期9卷 326-336页

作者： Xiang ding qian LI School of Government Nanjing UniversityNanjing 210023China School of Engineering Management Nanjing UniversityNanjing 210023China

The mechanism of risk allocation is designed to protect all stakeholders,and it is vital to project *** and quantitative ways of optimizing risk allocation have been well documented in extant literature(e.g.,allocation principles,models,and solutions),and the foci of existing research are usually the maximization of rational *** research has focused on partners’social preferences affecting the output of risk *** study presents a quantitative approach based on modeling alliance member(AM)’s inequity aversion(IA)to analyze risk-sharing arrangements in an alliance *** and Schmidfs inequity-aversion model is integrated into modeling partner’s *** paper derives results for an alliance leader(AL)’s optimal risk-sharing ratio and AM's optimal risk-management effort *** derivation is based on solving a restrained optimization problem using the conception and methods from Stackel-berg game *** show that an AM’s IA significantly affects risk allocation between AL and ***,envious preference is positively related to AL5s optimal risk-sharing ratio,whereas guilty preference negatively affects AL5s optimal risk-sharing *** findings will be of interest to academics and practitioners involved in designing alliance negotiations.

关键词： public project contract design risk sharing inequity aversion governance

A systematic framework of constructing surrogate model for slider track peeling strength prediction

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Science China(Technological Sciences) 2024年第10期67卷 3261-3274页

作者： dong XingJian CHEN qian LIU WenBo WANG dong PENG ZhiKe MENG Guang State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China KEIPER Seating Mechanisms Co. Ltd.Soochow 215500China Department of Industrial Engineering and Management Shanghai Jiao Tong UniversityShanghai 200240China

Peeling strength can comprehensively reflect slider track safety and is crucial in car seat safety *** methods for determining slider peeling strength are primarily physical testing and numerical ***,these methods encounter the potential challenges of high costs and overlong time consumption which have not been adequately ***,the efficient and low-cost surrogate model emerges as a promising ***,currently used surrogate models suffer from inefficiencies and complexity in data sampling,lack of robustness in local model predictions,and isolation between data sampling and model *** overcome these challenges,this paper aims to set up a systematic framework for slider track peeling strength prediction,including sensitivity analysis,dataset sampling,and model ***,the interpretable linear regression is performed to identify the sensitivity of various geometric variables to peeling *** on the variable sensitivity,a distance metric is constructed to measure the disparity of different variable ***,the sparsity-targeted sampling(STS)is proposed to formulate a representative ***,the sequentially selected local weighted linear regression(SLWLR)is designed to achieve accurate track peeling strength ***,a quantitative cost assessment of the supplementary dataset is proposed by utilizing the minimum adjacent sample distance as a *** results validate the efficacy of sequential selection and the weighting mechanism in enhancing localization ***,the proposed SLWLR method surpasses similar approaches and other common surrogate methods in terms of prediction performance and data quantity requirements,achieving an average absolute error of 3.3 kN in the simulated test dataset.

关键词： slider track peeling strength surrogate model sensitivity analysis data sampling local weighted linear regression

The role of hydrated anions in hydration lubrication

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Nano Research 2023年第1期16卷 1096-1100页

作者： Zibo Li qian Liu qiang Li Mingdong dong Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus C DK-8000Denmark

Hydration lubrication has long been invoked to account for the ultralow sliding friction between charged surfaces in aqueous environments,but still not well understood at ***,we explored the lubrication effect of hydrated halogen anions on positively charged surface at the atomic scale by using three-dimensional atomic force microscopy and friction force *** resolved three-dimensional imaging revealed that the anion layer was topped by a few hydration *** mechanical properties of the hydration layers were found mainly dependent on the concentration of electrolyte solutions and independent of the species of hydrated ***-scale friction experiments showed that the hydration friction coefficient and friction dissipation at low concentrations were orders of magnitude lower than that at high concentrations and in pure *** can be achieved in low concentration electrolyte *** results indicated that the changes of electrolyte solution concentrations led to different adsorption state of anions on the positively charged surface which gave rise to the difference of the friction *** findings in this study reveal the role of hydrated anions in hydration lubrication and provide deep insights into the origins of hydration lubrication.

关键词： hydration lubrication hydration structures anions friction three-dimensional atomic force microscopy(3D-AFM)