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Acta Metallurgica Sinica(English Letters) 2013年第6期26卷 754-760页

作者： Zongan LUO Guanglei wang Guangming XIE lipeng wang Kun ZHAO State Key Laboratory of Rolling and Automation Northeastern University Shougang Jingtang Iron & Steel Co. Ltd.

Vacuum hot roll bonding （VHRB） was used to bond pure titanium （Ti） plate to a 304 stainless steel （SS） plate with a niobium （Nb） interlayer, with the aim of producing a high-quality Ti-SS clad plate. The roll-bonding process was performed at different temperatures in the range of 850-1000℃, followed by characterization of microstructure and mechanical properties. The study demonstrates that the interfaces are free from cracks and discontinuities, and interdiffusion between the stainless steel and the titanium is effectively prevented by inserting a layer of pure Nb foil. No intermetallic reaction layer occurred at the Nb-Ti interface at any of the investigated temperatures. An intermetallic FeNb phase was formed at the Nb-SS interface when bonding was performed at 950 ℃ and above. The presence of the FeNb layer was confirmed by x-ray diffraction. The maximum shear strength of -396 MPa was obtained when bonding is carried out at 900 ℃. However, the formation of the FeNb layer at roll bonding temperature greater than 900 ℃ led to decrease in shear strength. Ductile fracture occurred through the Ti-Nb interface for roll-bonded temperatures of up to 900 ℃. On the other hand, at temperature of 950℃ and above, failure occurred through the Nb-SS interface, with brittle fracture characteristics.

关键词： Vacuum hot roll bonding (VHRB) Clad plate Interlayer Interface Shearstrength Intermetallic compound

Recent Advances in Mechanism of AIE Mechanochromic Materials

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Chemical Research in Chinese Universities 2021年第1期37卷 100-109页

作者： wang lipeng LIU Leijing XU Bin TIAN Wenjing State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun130012P.R.China

Organic mechanochromic materials(also known as piezochromic materials),whose color or emission changes under mechanical force,have attracted great interest owing to their potential applications in pressure sensors,rewritable materials,optical storage,and security *** mechanochromic materials with aggregation-induced emission(AIE)features have better development prospects and research value owing to their excellent optical *** date,mechanochromism has mostly been realized by means of mechanical ***,the magnitude of the grinding force is usually uncontrollable and its direction is anisotropic,making it awkward to study the mechanism of mechanochromic *** the contrary,hydrostatic pressure,whose magnitude and direction are controllable,is a more valid and governable method to investigate the mechanism of mechanochromic materials,which can help us to construct a meaningful structure-property relationship and understand the latent origin of the ***,it is conducive to developing other mechanochromic material systems with desired chemical and physical *** this review,we focus on the recent progress in the mechanism of organic mechanochromic materials with AIE features under hydrostatic *** types of mechanisms are included:intermolecular interaction change,intramolecular conformation change,transformation from locally excited state to intramolecular charge-transfer state,and intra-and inter-molecular effects induced by hydrostatic pressure,respectively.

关键词： Aggregation-induced emission Mechanism Mechanochromic Hydrostatic pressure

A LiDAR Point Clouds Dataset of Ships in a Maritime Environment

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1681-1694页

作者： Qiuyu Zhang lipeng wang Hao Meng Wen Zhang Genghua Huang the College of Intelligent Systems Science and Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Space Active Opto-Electronics Technology Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China

For the first time, this article introduces a LiDAR Point Clouds Dataset of Ships composed of both collected and simulated data to address the scarcity of LiDAR data in maritime applications. The collected data are acquired using specialized maritime LiDAR sensors in both inland waterways and wide-open ocean environments. The simulated data is generated by placing a ship in the LiDAR coordinate system and scanning it with a redeveloped Blensor that emulates the operation of a LiDAR sensor equipped with various laser beams. Furthermore,we also render point clouds for foggy and rainy weather conditions. To describe a realistic shipping environment, a dynamic tail wave is modeled by iterating the wave elevation of each point in a time series. Finally, networks serving small objects are migrated to ship applications by feeding our dataset. The positive effect of simulated data is described in object detection experiments, and the negative impact of tail waves as noise is verified in single-object tracking experiments. The Dataset is available at https://***/zqy411470859/ship_dataset.

关键词： 3D point clouds dataset dynamic tail wave fog simulation rainy simulation simulated data

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星载大口径环形天线的系统设计

中国空间科学技术(中英文) 2025年第1期45卷 24-33页

作者：冯涛张庆君林坤阳王立朋张桥杨军刚肖勇西安空间无线电技术研究所中国空间技术研究院遥感卫星总体部

环形可展开天线是星载大口径、超大口径可展开天线的理想结构形式，是高轨遥感、高轨通信卫星应用的关键载荷。星载环形天线是由周边展开桁架和索网系统组成的典型预应力结构，型面精度和展开基频是其主要性能指标。在轨可靠展开是在轨... 详细信息

环形可展开天线是星载大口径、超大口径可展开天线的理想结构形式，是高轨遥感、高轨通信卫星应用的关键载荷。星载环形天线是由周边展开桁架和索网系统组成的典型预应力结构，型面精度和展开基频是其主要性能指标。在轨可靠展开是在轨应用的前提，可靠展开是设计的重中之重，以在轨性能指标需求为目标，分析了环形天线各系统参数对在轨性能指标的影响。通过对展开动力系统和传动力系统进行分析，阐述了环形天线各系统参数对展开可靠性的影响，总结了以结构静力学手段评价在轨性能设计和动力学手段评价展开可靠性的方法，明确了通过结构动力学方法进行强度校核和星上锁紧释放设计的星载大口径环形天线系统设计流程，提出了各设计参数的优化策略，并给出了系统设计算例，为未来超大口径星载可展开天线的技术研究和工程研制提供参考。

关键词：星载环形天线在轨性能可展开结构系统设计参数优化策略

Multi-Receiver Signcryption Scheme with Multiple Key Generation Centers through Public Channel in Edge Computing

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China Communications 2022年第4期19卷 177-198页

作者： lipeng wang Zhi Guan Zhong Chen Mingsheng Hu School of Information Science and Technology Zhengzhou Normal UniversityZhengzhou 450044China School of Computer Science Peking UniversityBeijing 100871China

The emerging edge computing technology for the Internet of Things has been playing an important role in our daily life. It is promising to utilize a multi-receiver signcryption scheme to protect the transmission data when an edge device broadcasts its sensing data to many different end devices at a *** are several things to consider when we design a signcryption scheme. First existing schemes need to maintain a secure channel to generate the user private key, which may increase economic costs. Second the system private key of those schemes is kept secret by a single key generation center(KGC), and the single point of failure of KGC may compromise the whole system. For this, we propose a multi-receiver multimessage signcryption scheme without the secure channel. Firstly the scheme allows KGC to send secrets through the public channel, which reduces maintenance costs. Secondly, to eliminate the single point of failure, the scheme utilizes multiple KGCs to manage the system private key, and updates the secret of each KGC periodically to resist advanced persistent threat attacks. We demonstrate that the proposed scheme can achieve expected security properties. Performance analysis shows that it is with shorter ciphertext length and higher efficiency.

关键词： internet of things signcryption edge computing unforgeability confidentiality

Comparative evaluation of energy and resource consumption for vacuum carbothermal reduction and Pidgeon process used in magnesium production

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Journal of Magnesium and Alloys 2022年第3期10卷 756-767页

作者： Yang Tian lipeng wang Bin Yang Yongnian Dai Baoqiang Xu Fei wang Neng Xiong State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization Kunming University of Science and TechnologyKunmingPR China National Engineering Laboratory for Vacuum Metallurgy Kunming University of Science and TechnologyKunmingPR China Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province Kunming University of Science and TechnologyKunmingPR China School of Metallurgy and Energy Engineering Kunming University of Science and TechnologyKunmingPR China

With the fast development of the application of magnesium based alloys,the demand for primary magnesium is increasing dramatically all over the *** Pidgeon process is the most widely used process for producing magnesium in China,but suffers from problems such as high energy,resource consumption and environmental *** the process of vacuum carbothermal reduction to produce magnesium(VCTRM)has attracted more and more attention as its advantages,but it has not been well-practiced in industrial applications and there also is no comprehensive and quantitative analysis of this *** study quantified the flows of resource and energy for the Pidgeon process and the VCTRM process,then compared and analyzed these two processes with each other from three *** VCTRM process results in 63.14%and 69.16%lower of non-renewable mineral resources and energy consumptions when compared to the Pidgeon process,***,the low energy consumption(2.675 tce vs.8.681 tce)and material to magnesium ratio(2.953:1 vs.6.429:1)of the VCTRM process,which lead to lower greenhouse gas(GHG)emissions(8.777 t vs.26.337 t)and solid waste generation(0.522 t vs.5.465 t)with a decrease of 66.67%and 90.45%,*** indicate that the VCTRM process is a more environmentally friendly process for magnesium production with high efficiency but low cost and low pollution,and it shows a good potential to be industrialized in the future after solving the bottleneck problem of the reverse reaction.

关键词： Magnesium production Vacuum carbothermal reduction process Pidgeon process Energy and resource consumption Greenhouse gas emissions.

Transformation of Coal Gangue to Sodalite and Faujasite Using Alkali-hydrothermal Method

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1391-1396页

作者： wang Cheng FENG Kai wang lipeng YU Qianru DU Fuling LI Yan YU Kaining Hebei Center for Ecological and Environmental Geology Research Hebei GEO UniversityShijiazhuang 050031China School of Material Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an 710021China School of Gemmology and Materials Science Hebei GEO UniversityShijiazhuang050031China

The coal gangue as the only source of silicon and aluminum was employed to synthesize sodalite and faujasite using hydrothermal method,which directly treated the mixture of pre-treated coal gangue and NaOH solution under hydrothermal environment.X-ray powder diffraction analysis(XRD),thermogravimetry analysis(TG)and differential thermogravimetry analysis(DTG),scanning electron microscopy(SEM),high resolution transmission electron microscopy(HRTEM),N_(2)adsorption-desorption technique,X-ray photoelectron spectroscopy(XPS),*** used to characterize the ***^(2+) ion was used to evaluate the heavy metal ions removal performance of the *** experimental results show that the coal gangue,which consists of quartz,calcium feldspar,potassium feldspar and kaolinite,can transform to sodalite and faujasite under alkali-hydrothermal condition at 150 and 180℃,*** as-prepared sodalite and faujasite can effectively remove the simulated Cd2+ion wastewater and actual industrial wastewater containing As^(3+),Cd^(2+),and Cr^(3+)ions,and the good heavy metal ion removal performance of the zeolites is mainly attributed to their low Si/Al ratio and high Na+*** alkali-hydrothermal method appears to be a simple and efficient method for transformation of coal gangue to high purity zeolites.

关键词： coal gangue alkali-hydrothermal method sodalite faujasite

Adaptive fuzzy asymptotic control design for MIMO nonlinear systems with state constraints

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Journal of Control and Decision 2023年第4期10卷 610-623页

作者： Yongchao Liu Bowen Zeng Qidan Zhu lipeng wang Institute of Complexity Science School of AutomationQingdao UniversityQingdaoPeople’s Republic of China Shandong Key Laboratory of Industrial Control Technology QingdaoPeople’s Republic of China College of Intelligent Systems Science and Engineering Harbin Engineering UniversityHarbinPeople’s Republic of China

This paper addresses the asymptotic control problem of uncertain multi-input and multi-output(MIMO)nonlinear *** considered MIMO systems contain unknown virtual control coefficients(UVCCs)and state *** Lyapunov function by associating with the lower bounds of UVCCs is presented to counteract the adverse effect deriving from *** state constraints are ensured by utilising the barrier Lyapunov ***,the asymptotic tracking controller is recursively constructed by combining the backstepping technique with fuzzy logic *** remarkable character of the designed controller is that the asymptotic tracking performance can be achieved by introducing some smooth functions into adaptive backstepping *** contrast to the existing results,the conditions on the UVCCs are ***,the new control design is illustrated by a practical example.

关键词： Asymptotic tracking control state constraints bound estimation method nonlinear systems

Blockchain-Enabled Federated Learning with Differential Privacy for Internet of Vehicles

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Computers, Materials & Continua 2024年第10期81卷 1581-1593页

作者： Chi Cui Haiping Du Zhijuan Jia Yuchu He lipeng wang School of Information Science and Technology Zhengzhou Normal UniversityZhengzhou450044China School of Electrical Computer and Telecommunications EngineeringUniversity of WollongongWollongongNSW 2500Australia

The rapid evolution of artificial intelligence(AI)technologies has significantly propelled the advancement of the Internet of Vehicles(IoV).With AI support,represented by machine learning technology,vehicles gain the capability to make intelligent *** a distributed learning paradigm,federated learning(FL)has emerged as a preferred solution in *** to traditional centralized machine learning,FL reduces communication overhead and improves privacy *** these benefits,FL still faces some security and privacy concerns,such as poisoning attacks and inference attacks,prompting exploration into blockchain integration to enhance its security *** paper introduces a novel blockchain-enabled federated learning(BCFL)scheme with differential privacy(DP)tailored for *** order to meet the performance demanding IoV environment,the proposed methodology integrates a consortium blockchain with Practical Byzantine Fault Tolerance(PBFT)consensus,which offers superior efficiency over the conventional public *** addition,the proposed approach utilizes the Differentially Private Stochastic Gradient Descent(DP-SGD)algorithm in the local training process of FL for enhanced privacy *** results indicate that the integration of blockchain elevates the security level of FL in that the proposed approach effectively safeguards FL against poisoning *** the other hand,the additional overhead associated with blockchain integration is also limited to a moderate level to meet the efficiency criteria of ***,by incorporating DP,the proposed approach is shown to have the(ε-δ)privacy guarantee while maintaining an acceptable level of model *** enhancement effectively mitigates the threat of inference attacks on private information.

关键词： Blockchain federated learning differential privacy Internet of Vehicles

全堆芯三维时空动力学中子输运程序SAAFCGSN应用研究

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核动力工程 2025年第1期46卷 13-23页

作者：姜夺玉许鹏江新标胡田亮王立鹏曹璐李达火箭军工程大学西安710025 西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室西安710024

当前为了应对新型先进小堆技术的发展,反应堆物理数值计算程序对三维全堆芯输运计算的要求不断提高。本文基于MOOSE平台开发了全堆芯三维时空动力学中子输运程序SAAFCGSN,该程序基于有限元方法实现空间变量离散,基于残差形式实现堆芯稳... 详细信息

当前为了应对新型先进小堆技术的发展,反应堆物理数值计算程序对三维全堆芯输运计算的要求不断提高。本文基于MOOSE平台开发了全堆芯三维时空动力学中子输运程序SAAFCGSN,该程序基于有限元方法实现空间变量离散,基于残差形式实现堆芯稳态、瞬态中子输运方程以及缓发中子先驱核方程的求解,采用JFNK方法避免直接求解Jacobin矩阵,从而提高计算速度,降低内存占用。为了检验程序的瞬态计算能力,本文使用经济发展与合作组织核能机构(OECD/NEA)C5G7-TD系列基准题验证了程序的可靠性,并与高保真确定论中子输运程序及蒙特卡罗程序模拟结果进行比较分析。研究表明,SAAFCGSN程序计算精度较高,可以有效处理控制棒尖齿效应,并得到详细的三维堆芯中子注量率分布,满足先进小堆的稳态及瞬态中子学计算需求。

关键词： SAAFCGSN MOOSE平台时空动力学 C5G7-TD基准题尖齿效应

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