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Chinese Physics B 2022年第3期31卷 146-159页

作者： Liang'an huo Yafang Dong Business School University of Shanghai for Science and TechnologyShanghai 200093China

The appearance of rumors intensifies people’s panic and affects social stability. How to control the spread of rumors has become an important issue which is worth studying. In order to more accurately reflect the actual situation in the real world, a stochastic model incorporating media coverage and Lévy noise is proposed to describe the dynamic process of rumor propagation. By introducing two control strategies of popular science education and media coverage in an emergency event, an near-optimal control problem that minimizes the influence and control cost of rumor propagation is *** conditions for near-optimal control of the model are established by using a Hamiltonian function. Then the necessary conditions for near-optimal control are obtained by using the Pontryagin maximum principle. Finally, the effect of popular science education, media coverage and Lévy noise on rumor propagation process control is verified by numerical simulation.

关键词： rumor propagation near-optimal control popular science education media coverage Lévy noise

Secure output synchronization of heterogeneous multi-agent systems against false data injection attacks

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Science China(Information Sciences) 2022年第6期65卷 142-154页

作者： Shicheng huo Dalin HUANG Ya ZHANG School of Automation Southeast University School of Cyber Science and Engineering Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education

This paper studies secure output synchronization for heterogeneous multi-agent systems against false data injection(FDI) attacks. Both the sensors and actuators of agents may be injected into FDI *** mitigate the malicious impact of these attacks on synchronization performance, a desired reference model,which is combined with an auxiliary system, is first designed for each agent to simulate its normal system dynamics. Then, based on this reference model, a state feedback cooperative controller and a static output feedback cooperative controller, which consist of adaptive compensators, are proposed, respectively. The integrated control protocols can ensure that the output synchronization error is small by adjusting some designed parameters even in the presence of FDI attacks. An illustrative example is employed to demonstrate the effectiveness of the proposed method.

关键词： False data injection attacks output synchronization false data injection attacks adaptive compensators heterogeneousmulti-agent systems secure control

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Current status and development of percutaneous coronary intervention in China

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第8期11卷 631-633页

作者： Yong huo Department of Cardiology and Heart Center Peking University FirstHospital Beijing 100034 China

Dr. Gruntzig et al. （1979） successfully completed the world＇s first percutaneous coronary intervention （PCI）, a percutaneous transluminal coronary angioplasty （PTCA）, in 1977. The first reported PTCA in China was in 1984. With the development of PCI techniques, while more and more patients have benefited, there are ongoing challenges as well.

关键词： PCI Current status and development of percutaneous coronary intervention in China

Numerical study on solid–liquid phase change in paraffin as phase change material for battery thermal management

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Science Bulletin 2016年第5期61卷 391-400页

作者： Qiannan Zhang Yutao huo Zhonghao Rao School of Electric Power Engineering China University of Mining and Technology Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast University

With the large latent heat and low cost, the paraffin has been widely used in battery thermal management(BTM) system to improve the efficiency and cycling life of power battery. The numerical model of paraffin melting in a cavity has been established, and the effects on the solid–liquid phase change process have been investigated for the purpose of enhancing the heat transfer performance of paraffin-based BTM system. The results showed that the location of the heating wall had great effects on the melting process. The paraffin in the cavity melted most quickly when the heating wall located at the bottom. Furthermore, the effects of thermal conductivity and the velocity of the slip wall have been considered. The gradient of liquid fraction increased with the increase in thermal conductivity, and the melting process could be accelerated or delayed by the slip wall with different velocity.

关键词： Phase change material Battery thermal management Solid–liquid phase change Heat flux Thermal conductivity

Friction of graphene on a substrate with a cavity defect

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Science China(Technological Sciences) 2024年第9期67卷 2834-2841页

作者： ZHOU Peng huo ZhanLei CHANG TienChong Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai Frontier Science Center of MechanoinformaticsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China The Center for Computational Mechanics and Engineering Applications Provincial Mechanics Experimental Teaching Demonstration CenterSchool of Civil EngineeringHebei University of EngineeringHandan 056038China Shanghai Institute of Aircraft Mechanics and Control Tongji UniversityShanghai 200092China Joint-Research Center for Computational Materials Zhejiang LaboratoryHangzhou 311100China

The frictional behavior of supported graphene is known to be influenced by the physical properties and surface morphologies of the underlying substrate. However, it is unclear how a surface defect on the substrate affects the friction of supported graphene,and it is even unknown how to define the defect-induced friction force in this context. Here we conduct molecular dynamics(MD) simulations to investigate the friction between a square diamond slider and a graphene sheet supported by a copper substrate with a surface cavity defect. Our results demonstrate that the defect-induced friction exhibits a nonlinear increase with cavity size, while it decreases nonlinearly with slider size. We propose that the definition of defect-induced friction can be linked to the increase in friction work over the length of the slider, and is closely correlated to the defect-induced relative change in indentation depth and the ratio of the cavity area to the contact area. These findings provide a comprehensive evaluation of the impact of a substrate cavity defect on the friction of supported graphene and offer insights that may have broader implications for understanding defect-induced friction in other two-dimensional materials.

关键词： friction graphene underneath substrate cavity defect

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面向工业场景的无人机时空众包资源分配

工程科学学报 2025年第1期47卷 91-100页

作者：刘娅汐李旭龙霍佳皓皇甫伟北京科技大学计算机与通信工程学院北京100083 北京市融合网络与泛在业务工程技术研究中心北京100083

无人机时空众包资源分配是工业物联网能源管理中的重要任务之一.尽管现有方法考虑了联合反映时间敏感性和公平性的信息新鲜度指标,但忽略了无人机禁飞区和窃听者对数据新鲜度的影响.本文提出了一种基于深度强化学习的无人机时空众包资... 详细信息

无人机时空众包资源分配是工业物联网能源管理中的重要任务之一.尽管现有方法考虑了联合反映时间敏感性和公平性的信息新鲜度指标,但忽略了无人机禁飞区和窃听者对数据新鲜度的影响.本文提出了一种基于深度强化学习的无人机时空众包资源分配方法,在考虑无人机禁飞区约束和对窃听者发送干扰信号以保障数据安全的情况下,最小化平均信息新鲜度和物联网设备能耗,从而得到最优无人机轨迹、发射干扰信号功率和物联网发射功率.然而,无人机时空众包中的资源分配复杂且存在挑战,主要表现为决策变量类型多且与考虑服务质量要求的系统性能指标关系复杂.本文将该问题建模为马尔可夫决策过程并使用先进的深度强化学习算法求解该问题,即软演员–评论家(SAC)算法.在多无人机场景下验证了所提出算法在解决无人机时空众包资源分配任务中的有效性和正确性.另外,SAC算法相较于其他两种先进的深度强化学习算法,即深度确定性策略梯度算法和双延迟深度确定性策略梯度算法,具有更快的收敛速度和更优的解.最后,分析了最优无人机数目的选择方案.

关键词：无人机工业能源管理时空众包资源分配深度强化学习

Maturity assessment model for aircraft collaborative design software solution

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Journal of Systems Engineering and Electronics 2018年第6期29卷 1228-1236页

作者： huo Ying QIU Peng ZHAI Jiyou School of Computer Engineering Nanjing Institute of Technology

In order to assure quality and control process in the development of the aircraft collaborative design software, a maturity assessment model is proposed. The requirements designing—house of quality is designed to evaluate the maturity degree of the solution, and the evaluation results can help to manage and control the development process. Furthermore, a fuzzy evaluation method based on the minimum deviation is proposed to deal with the fuzzy information. The quantitative evaluation result of the maturity degree can be calculated by optimizing the semantic discount factor aim for the minimum deviation. Finally, this model is illustrated and analyzed by an example study of the aircraft collaborative design software.

关键词： aircraft collaborative design software development process quality function deployment fuzzy evaluation method

Near-optimal control of a stochastic rumor spreading model with Holling II functional response function and imprecise parameters

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Chinese Physics B 2021年第12期30卷 182-194页

作者： Liang’an huo Xiaomin Chen Business School University of Shanghai for Science and TechnologyShanghai 200093China

In recent years,rumor spreading has caused widespread public panic and affected the whole social harmony and ***,how to control the rumor spreading effectively and reduce its negative influence urgently needs people to pay much *** this paper,we mainly study the near-optimal control of a stochastic rumor spreading model with Holling II functional response function and imprecise ***,the science knowledge propagation and the refutation mechanism as the control strategies are introduced into a stochastic rumor spreading ***,some sufficient and necessary conditions for the near-optimal control of the stochastic rumor spreading model are discussed ***,through some numerical simulations,the validity and availability of theoretical analysis is ***,it shows the significance and effectiveness of the proposed control strategies on controlling rumor spreading,and demonstrates the influence of stochastic disturbance and imprecise parameters on the process of rumor spreading.

关键词： rumor spreading HollingⅡfunctional response function near-optimal control stochastic process

Behavior of phenol adsorption on thermal modified activated carbon

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Chinese Journal of Chemical Engineering 2016年第4期24卷 446-452页

作者： Dengfeng Zhang Peili huo Wei Liu Faculty of Chemical Engineering Kunming University of Science and Technology

Adsorption process is acknowledged as an effective option for phenolic wastewater treatment. In this work, the activated carbon （AC） samples after thermal modification were prepared by using muffle furnace. The phenol ad- sorption kinetics and equilibrium measurements were carried out under static conditions at temperature ranging from 25 to 55 ~C. The test results show that the thermal modification can enhance phenol adsorption on AC samples. The porous structure and surface chemistry analyses indicate that the decay in pore morphology and decrease of total oxygen-containing functional groups are found for the thermal modified AC samples. Thus, it can be further inferred that the decrease of total oxygen-containing functional groups on the modified AC sam- ples is the main reason for the enhanced phenol adsorption capacity. For both the raw sample and the optimum modified AC sample at 900 ~C, the pseudo-second order kinetics and Langmuir models are found to fit the exper- imental data very well. The maximum phenol adsorption capacity of the optimum modified AC sample can reach 144,93 mg.g ~ which is higher than that of the raw sample, i.e. 119.53 mg.g 1. Adsorption thermodynamics analysis confirms that the phenol adsorption on the optimum modified AC sample is an exothermic process and mainly via physical adsorption.

关键词： AdsorbentsActivated carbonPhenolAdsorptionThermal modificationOxygen-containing functional groups

Multi-camera calibration method based on minimizing the difference of reprojection error vectors

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Journal of Systems Engineering and Electronics 2018年第4期29卷 844-853页

作者： huo Ju LI Yunhui YANG Ming School of Electrical Engineering Harbin Institute of Technology Control and Simulation Center Harbin Institute of Technology

In order to achieve a high precision in three-dimensional（3D） multi-camera measurement system, an efficient multi-cameracalibration method is proposed. A stitching method of large scalecalibration targets is deduced, and a fundamental of multi-cameracalibration based on the large scale calibration target is *** avoid the shortcomings of the method, the vector differencesof reprojection error with the presence of the constraint conditionof the constant rigid body transformation is modelled, and mini-mized by the Levenberg-Marquardt （LM） method. Results of thesimulation and observation data calibration experiment show thatthe accuracy of the system calibrated by the proposed methodreaches 2 mm when measuring distance section of 20 000 mmand scale section of 7 000 mm × 7 000 mm. Consequently, theproposed method of multi-camera calibration performs better thanthe fundamental in stability. This technique offers a more uniformerror distribution for measuring large scale space.

关键词： vision measurement multi-camera calibration field stitching vector error