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Chinese Journal of Mechanical Engineering 2024年第1期37卷 242-253页

作者： yifan Bao Jianfei Yao Fabrizio Scarpa Yan li College of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of High-end Compressor and System Technology Beijing 100029China Beijing Key Laboratory of High-end Mechanical Equipment Health Monitoring and Self-Recovery Beijing University of Chemical TechnologyBeijing 100029China Key Lab of Engine Health Monitoring-Control and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing 100029China Bristol Composites Institute(ACCIS) University of BristolBristol BS81TRUK Dynamics and Control Research Group(DCRG) University of BristolBristol BS81TRUK

This paper proposes a modified iterative learning control(MILC)periodical feedback-feedforward algorithm to reduce the vibration of a rotor caused by coupled unbalance and parallel *** control of the vibration of the rotor is provided by an active magnetic actuator(AMA).The iterative gain of the MILC algorithm here presented has a self-adjustment based on the magnitude of the *** filters are adopted to extract the synchronous(1×Ω)and twice rotational frequency(2×Ω)components of the rotor *** the notch frequency of the filter and the size of feedforward storage used during the experiment have a real-time adaptation to the rotational *** method proposed in this work can provide effective suppression of the vibration of the rotor in case of sudden changes or fluctuations of the rotor *** and experiments using the MILC algorithm proposed here are carried out and give evidence to the feasibility and robustness of the technique proposed.

关键词： Rotor vibration suppression Modified iterative learning control Unbalance Parallel misalignment Active magnetic actuator

恶性骨肿瘤患者主要照护者无法忍受不确定性对抑郁症状的作用路径分析

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中国医药导报 2024年第23期21卷 81-86页

作者：李蕊宋红张春艳李一帆刘海棠徐州医科大学第二附属医院骨科江苏徐州221000 徐州医科大学第二附属医院护理部江苏徐州221000

目的分析恶性骨肿瘤患者主要照护者无法忍受不确定性及抑郁症状的现状并探讨其作用路径。方法选取2021年10月至2023年12月于徐州医科大学第二附属医院骨科收治的230例恶性骨肿瘤患者主要照护者为研究对象。采用基本信息问卷、无法忍受... 详细信息

目的分析恶性骨肿瘤患者主要照护者无法忍受不确定性及抑郁症状的现状并探讨其作用路径。方法选取2021年10月至2023年12月于徐州医科大学第二附属医院骨科收治的230例恶性骨肿瘤患者主要照护者为研究对象。采用基本信息问卷、无法忍受不确定性量表简版(IUS-12)、心理痛苦温度计(DT)、心理资本问卷(PCQ-24)及9条目患者健康问卷(PHQ-9)进行问卷调查,分析心理痛苦和心理资本在无法忍受不确定性与抑郁症状间的链式中介效应。结果恶性骨肿瘤患者主要照护者IUS-12总分为(32.13±6.55)分,DT总分为(5.34±2.46)分,PCQ-24总分为(84.22±11.39)分,PHQ-9总分为(9.69±2.24)分。IUS-12评分与DT、PHQ-9评分呈正相关(r=0.531、0.458,P<0.05),与PCQ-24评分呈负相关(r=-0.382,P<0.05);DT评分与PCQ-24评分呈负相关(r=-0.542,P<0.05),与PHQ-9评分呈正相关(r=0.586,P<0.05);PCQ-24评分与PHQ-9评分呈负相关(r=-0.512,P<0.05)。结构方程模型结果显示,χ^(2)/自由度=2.864、拟合优度指数=0.956、调整拟合优度指数=0.924、规准适配指数=0.983、比较拟合指数=0.982、近似误差均方根=0.048,说明模型的适配度良好。路径结果显示,无法忍受不确定性对抑郁症状的直接效应为0.362,心理痛苦和心理资本在两者间存在中介效应(P<0.05)。结论恶性骨肿瘤患者主要照护者无法忍受不确定性处于中高水平,抑郁症状显著,两者存在正相关关系。恶性骨肿瘤患者主要照护者无法忍受不确定性可直接作用于抑郁症状,也可通过心理痛苦、心理资本的中介作用间接影响抑郁症状。

关键词：骨肿瘤照护者无法忍受不确定性心理痛苦心理资本抑郁症状路径

Boosting C–C coupling to multicarbon products via high-pressure CO electroreduction

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Journal of Energy Chemistry 2023年第10期85卷 102-107,I0005页

作者： Wenqiang Yang Huan liu Yutai Qi yifan li Yi Cui liang Yu Xiaoju Cui Dehui Deng State Key Laboratory of Catalysis Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Vacuum Interconnected Nanotech Workstation Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuChina

Electrochemical CO reduction reaction(CORR) provides a promising approach for producing valuable multicarbon products(C_(2+)), while the low solubility of CO in aqueous solution and high energy barrier of C–C coupling as well as the competing hydrogen evolution reaction(HER) largely limit the efficiency for C_(2+)production in CORR. Here we report an overturn on the Faradaic efficiency of CORR from being HER-dominant to C_(2+)formation-dominant over a wide potential window, accompanied by a significant activity enhancement over a Moss-like Cu catalyst via pressuring CO. With the CO pressure rising from 1 to 40 atm, the C_(2+)Faradaic efficiency and partial current density remarkably increase from 22.8%and 18.9 mA cm^(-2)to 89.7% and 116.7 mA cm^(-2), respectively. Experimental and theoretical investigations reveal that high pressure-induced high CO coverage on metallic Cu surface weakens the Cu–C bond via reducing electron transfer from Cu to adsorbed CO and restrains hydrogen adsorption, which significantly facilitates the C–C coupling while suppressing HER on the predominant Cu(111) surface, thereby boosting the CO electroreduction to C_(2+)activity.

关键词： CO electroreduction High pressure electrochemistry Cu catalyst C–C coupling Multicarbon products

热镀锌机组矫直机压下装置故障原因分析及改进

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山西冶金 2024年第5期47卷 237-238,241页

作者：张鹏举武贝贝李宜凡秦莹普李松晓邯钢邯宝冷轧厂河北邯郸056003

分析了邯钢邯宝冷轧厂热镀锌机组矫直机常见的压下调节装置主轴断裂、蜗轮蜗杆同步轴两端不平衡等问题,采取了有针对性的改进措施,解决了矫直机压下调节装置同步轴主轴断裂、故障无法及时发现造成事故扩大化等问题,创造了可观的经济效益... 详细信息

分析了邯钢邯宝冷轧厂热镀锌机组矫直机常见的压下调节装置主轴断裂、蜗轮蜗杆同步轴两端不平衡等问题,采取了有针对性的改进措施,解决了矫直机压下调节装置同步轴主轴断裂、故障无法及时发现造成事故扩大化等问题,创造了可观的经济效益,有效地保证了生产线的稳定运行。

关键词：矫直机压下装置蜗轮蜗杆联轴器断裂压下装置故障主轴改进

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高压电场选育高产酸性木聚糖酶菌株的研究

饲料工业 2024年第7期45卷 74-79页

作者：李一藩邬泳江薛文洁胡建华宋智青刘占英内蒙古工业大学化工学院内蒙古呼和浩特010050 内蒙古自治区发酵产业节能减排工程技术研究中心内蒙古呼和浩特010050 生物发酵绿色制造内蒙古自治区工程研究中心内蒙古呼和浩特010050 内蒙古工业大学理学院内蒙古呼和浩特010050

为获得适用于动物饲料的木聚糖酶高产菌株,并验证高压电场诱变方法的有效性,于农田土壤中筛选出高产菌株,在高压电场中进行诱变,筛选最佳的突变菌株。出发菌株初步鉴定为沙福芽孢杆菌,命名为Bacillus safensis B16。该菌株所产木聚糖酶... 详细信息

为获得适用于动物饲料的木聚糖酶高产菌株,并验证高压电场诱变方法的有效性,于农田土壤中筛选出高产菌株,在高压电场中进行诱变,筛选最佳的突变菌株。出发菌株初步鉴定为沙福芽孢杆菌,命名为Bacillus safensis B16。该菌株所产木聚糖酶在pH 5、60℃下酶活性为217.34 U/mL,且60℃时的半衰期为229 min,热稳定性良好。在6~24 kV、极间距为3 cm的高压电晕电场中处理0~10 min,最终在10 kV下处理6 min选育出一株木聚糖酶高产菌株B16106-2,酶活性达到256.73 U/mL,较出发菌株提升了18.12%,且传代7次后菌株的产酶能力基本不变,具有良好的遗传稳定性。突变菌株所产木聚糖酶的最适酶反应条件不变。研究证明,高压电晕电场是一种有效的诱变方式,且筛选出的菌株B16106-2性能良好。

关键词：木聚糖酶诱变选育高压电晕电场热稳定性沙福芽孢杆菌

A Review of Hybrid Cyber Threats Modelling and Detection Using Artificial Intelligence in IIoT

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1233-1261页

作者： yifan liu Shancang li Xinheng Wang li Xu School of Computer Science and Informatics Cardiff UniversityCardiffCF244AGUK Department of Mechatronics and Robotics Xi’an Jiaotong-Liverpool UniversitySuzhou215123China Department of Information Technology&Decision Sciences Old Dominion UniversityNorfolk23529USA

The Industrial Internet of Things(IIoT)has brought numerous benefits,such as improved efficiency,smart analytics,and increased ***,it also exposes connected devices,users,applications,and data generated to cyber security threats that need to be *** work investigates hybrid cyber threats(HCTs),which are now working on an entirely new level with the increasingly adopted *** work focuses on emerging methods to model,detect,and defend against hybrid cyber attacks using machine learning(ML)***,a novel ML-based HCT modelling and analysis framework was proposed,in which L1 regularisation and Random Forest were used to cluster features and analyse the importance and impact of each feature in both individual threats and HCTs.A grey relation analysis-based model was employed to construct the correlation between IIoT components and different threats.

关键词： Cyber security Industrial Internet of Things artificial intelligence machine learning algorithms hybrid cyber threats

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light(Science & Applications) 2024年第2期13卷 333-346页

作者： yifan Sun Qian li ling-Jun Kong Xiangdong Zhang Key Laboratory of advanced optoelectronic quantum architecture and measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of Technology100081BeijingChina

Compared with electrical neural networks,optical neural networks(ONNs)have the potentials to break the limit of the bandwidth and reduce the consumption of energy,and therefore draw much attention in recent *** far,several types of ONNs have been ***,the current ONNs cannot realize the acceleration as powerful as that indicated by the models like quantum neural *** to construct and realize an ONN with the quantum speedup is a huge ***,we propose theoretically and demonstrate experimentally a new type of optical convolutional neural network by introducing the optical *** is called the correlated optical convolutional neural network(COCNN).We show that the COCNN can exhibit“quantum speedup”in the training *** character is verified from the two *** is the direct illustration of the faster convergence by comparing the loss function curves of the COCNN with that of the traditional convolutional neural network(CNN).Such a result is compatible with the training performance of the recently proposed quantum convolutional neural network(QCNN).The other is the demonstration of the COCNN’s capability to perform the QCNN phase recognition circuit,validating the connection between the COCNN and the ***,we take the COCNN analog to the 3-qubit QCNN phase recognition circuit as an example and perform an experiment to show the soundness and the feasibility of *** results perfectly match the theoretical *** proposal opens up a new avenue for realizing the ONNs with the quantum speedup,which will benefit the information processing in the era of big data.

关键词： process quantum convolution

The reaction mechanism and interfacial crystallization of Al nanoparticle-embedded Ni under shock loading

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Defence Technology（防务技术） 2024年第3期33卷 114-124页

作者： yifan Xie Jian-li Shao Rui liu Pengwan Chen State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Explosion Protection and Emergency Disposal Technology Engineering Research Center of the Ministry of Education Beijing100039China

The shock-induced reaction mechanism and characteristics of Ni/Al system,considering an Al nanoparticle-embedded Ni single crystal,are investigated through molecular dynamics *** the shock melting of Al nanoparticle,interfacial crystallization and dissolution are the main *** reaction degree of Al particle first increases linearly and then logarithmically with time driven by rapid mechanical mixing and following *** reaction rate increases with the decrease of particle diameter,however,the reaction is seriously hindered by interfacial crystallization when the diameter is lower than 9 nm in our ***,we found a negative exponential growth in the fraction of crystallized Al atoms,and the crystallinity of B2-NiAl(up to 20%)is positively correlated with the specific surface area of Al *** can be attributed to the formation mechanism of B2-NiAl by structural evolution of finite mixing layer near the collapsed *** shock melting of both Al particle and Ni matrix,the liquid-liquid phase inter-diffusion is the main reaction mechanism that can be enhanced by the formation of internal *** addition,the enhanced diffusion is manifested in the logarithmic growth law of mean square displacement,which results in an almost constant reaction rate similar to the mechanical mixing process.

关键词： Shock-induced reaction Molecular dynamics simulations Interfacial crystallization Reaction mechanism

Regulating ethane and ethylene synthesis by proton corridor microenvironment for CO_(2) electrolysis

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Journal of Energy Chemistry 2023年第12期87卷 368-377,I0010页

作者： Xiaowen Zhang Bohua Ren Hao li Shuxuan liu Haoyang Xiong Silong Dong yifan li Dan Luo Yi Cui Guobin Wen Xin Wang South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at ZhaoqingSouth China Normal UniversityGuangzhou 510006GuangdongChina Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of Waterloo200 University Avenue WestWaterlooOntario N2L 3G1Canada School of Nano Technology and Nano Bionics University of Science and Technology of ChinaHefei 230026AnhuiChina i-lab Nano-X Vacuum Interconnected WorkstationSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123JiangsuChina State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringNational Supercomputer Centers in ChangshaHunan UniversityChangsha 410082HunanChina

Electrocatalytic reduction of carbon dioxide is one of the most effective strategies to achieve carbon neutrality and energy *** high-value multi-carbon products have been widely studied,limited electrocatalysts have been reported for the selective conversion of *** importantly,the factors tuning the selectivity between ethane and ethylene have not been ***,Zn@Cu nanowire arrays(Zn@Cu-NWAs) catalyst is proposed to stimulate the maintenance of efficient CO_(2)-to-C_(2)H_(6) conversion at high current ***,in order to investigate the factors affecting the interconversion between ethane and ethylene,the counterpart catalyst that facilitates C–C coupling to ethylene was also ***-of-flight secondary-ion mass spectroscopy(TOF-SIMS),in-situ Raman spectroscopy,and simulation results show that Zn@Cu-NWAs can provide a localized proton corridor environment for the formation of ethane,accelerating the further proton-coupled CO_(2) reduction reaction(CO_(2)RR)***,this catalyst delivered an ethane Faraday efficiency of over 65% at-1.14 V *** with a total current density of 142.3 mA/cm^(2).This work provides a new perspective on regulating the local microenvironment to modify the selectivity of multi-carbon products.

关键词： Proton microenvironment CO_(2)reduction C2+product Selective conversion Cu-Zn materials

重质碳酸钙聚合改性及其在聚氯乙烯中的应用研究

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中国塑料 2024年第5期38卷 61-65页

作者：蓝擎侯欣怡李一凡潘凯周佳菊黄丹梦黄灏彬广西产研院新型功能材料研究所有限公司南宁530000

以重质碳酸钙为主要原材料,通过水磨、聚合改性得到可用于聚氯乙烯(PVC)管件的改性重质碳酸钙。通过粒度仪、热重分析仪、红外光谱仪、摆锤式冲击试验机、万能拉伸试验机、色差仪和光泽仪分别对重质碳酸钙及重质碳酸钙制备的PVC产品进... 详细信息

以重质碳酸钙为主要原材料,通过水磨、聚合改性得到可用于聚氯乙烯(PVC)管件的改性重质碳酸钙。通过粒度仪、热重分析仪、红外光谱仪、摆锤式冲击试验机、万能拉伸试验机、色差仪和光泽仪分别对重质碳酸钙及重质碳酸钙制备的PVC产品进行了表征和分析。结果表明,需在碳酸钙浆液中进行原位聚合反应,聚醋酸乙烯酯才能对碳酸钙包覆改性;聚醋酸乙烯酯改性的碳酸钙相较于常规硬脂酸改性的碳酸钙,在PVC材料应用中表现出了更好的外观及力学性能,这归因于聚醋酸乙烯酯能更好地解决碳酸钙与PVC之间的相容性问题。

关键词：重质碳酸钙聚氯乙烯聚合改性聚醋酸乙烯酯