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Source model of the 2018 M_(w)7.5 Papua New Guinea earthquake constrained by InSAR measurements: Insight into a blind rupture beneath the New Guinea Highlands

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Geodesy and Geodynamics 2024年第4期15卷 315-325页

作者： Wei Chen Tianchen Sheng Wei xiong Key Laboratory of Earthquake Geodesy Institute of SeismologyChina Earthquake AdministrationWuhan 430071China Qinghai Provincial Basic Surveying and Mapping Institute Xining 810001China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China

The Southern Highland Fold and Thrust Belt(SHFTB),the boundary of the Australian plate and the New Guinea Highland block,significantly contributes to the convergent deformation along the plate ***,due to the lack of observation data,the detailed slip pattern of the SHFTB and the orogenic mechanism beneath the New Guinea Highlands remains *** 25 February 2018,the M_(w)7.5 Papua New Guinea(PNG)earthquake struck the southeastern segment of the *** detailed rupture characteristics of this event is significant for further clarifying the inter-seismic slip pattern along the ***,the coseismic deformation field of this earthquake was obtained using high-resolution ALOS-2 satellite *** find that the 2018 M_(w)7.5 PNG earthquake ruptured a large-scaled fault(SHFTB)extending to the lower crust(deeper than 20 km)beneath the New Guinea Highlands,with a dip angle of 24°.The slips on the fault plane are equivalent to moment magnitudes of M_(w)*** major asperities with thrust-dominated slip of up to 3.94 m are detected on the fault *** finding implies that the slip pattern on the eastern segment of the SHFTB is dominated by thrust,rather than with significant sinistral movement,as previously *** tectonic deformation across the New Guinea Highlands is possibly concentrated on the large-scale fault SHFTB and primarily controls the intra-continental orogeny in the central Papua New Guinea.

关键词： 2018M_(w)7.5PapuaNewGuineaearthquake The Southern Highlands Fold-and-Thrust Belt InSAR Slipdistribution Seismicrisk

Online interactive identification method based on ESO disturbance estimation for motion model of double propeller propulsion unmanned surface vehicle

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Control Theory and Technology 2024年第2期22卷 292-314页

作者： Yong xiong Xianfei Wang Siwen Zhou School of Navigation Wuhan University of TechnologyWuhan430063HubeiChina National Engineering Research Center for Water Transport Safety Wuhan430063HubeiChina Hubei Inland Technology Key Laboratory Wuhan430063HubeiChina

In this paper, the online parameter identification problem of the mathematical model of an unmanned surface vehicle (USV) considering the characteristics of the actuator is studied. A data-driven mathematical model of motion is very meaningful to realize trajectory prediction and adaptive motion control of the USV. An interactive identification algorithm (ESO–MILS, extended state observer–multi-innovation least squares) based on ESO is proposed. The robustness of online identification is improved by expanding the state observer to estimate the current disturbance without making artificial assumptions. Specifically, the three-degree-of-freedom dynamic equation of the double propeller propulsion USV is constructed. A linear model for online identification is derived by parameterization. Based on the least square criterion function, it is proved that the interactive identification method with disturbance estimation can improve the identification accuracy from the perspective of mathematical expectation. The extended state observer is designed to estimate the unknown disturbance in the model. The online interactive update improves the disturbance immunity of the identification algorithm. Finally, the effectiveness of the interactive identification algorithm is verified by simulation experiment and real ship experiment.

关键词： Identification of parameters Ship motion model Extended state observer Multinomial innovation least squares Interactive identification

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可调谐半导体激光器的精密控制系统设计

激光技术 2015年第3期39卷 316-319页

作者：曹延昌熊继军侯庆志中北大学电子测试技术国家重点实验室太原030051

为了满足高精密测量领域对半导体激光器高稳定度的要求,设计了一种高稳定度、低噪声的半导体激光器控制系统。该控制系统由电流驱动和温度控制两部分组成,电流控制部分采用负反馈控制保持电流稳定,温度控制部分采用高度集成的MAX1978作... 详细信息

为了满足高精密测量领域对半导体激光器高稳定度的要求,设计了一种高稳定度、低噪声的半导体激光器控制系统。该控制系统由电流驱动和温度控制两部分组成,电流控制部分采用负反馈控制保持电流稳定,温度控制部分采用高度集成的MAX1978作为主控芯片,驱动半导体制冷器进行温度补偿。经过实验验证,电流在200m A范围内连续可调,电流控制精度高达1μA,在3k Hz^100k Hz带宽内交流噪声有效值小于300n A,长期温度漂移小于2m℃。结果表明,该系统可用于驱动分布式反馈外腔半导体激光器和分布式布喇格反射半导体激光器。

关键词：光电子学控制系统高稳定度低噪声

Analysis of thermal management and anti-mechanical abuse of multi-functional battery modules based on magneto-sensitive shear thickening fluid

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 529-542页

作者： Yang xiong Bo LU Yicheng SONG Junqian ZHANG Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Frontier Science Center of MechanoinformaticsShanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China Zhejiang Laboratory Hangzhou 311100China

Electric vehicles(EVs)have garnered significant attention as a vital driver of economic growth and environmental ***,ensuring the safety of high-energy batteries is now a top priority that cannot be overlooked during large-scale *** paper proposes an innovative active protection and cooling integrated battery module using smart materials,magneto-sensitive shear thickening fluid(MSTF),which is specifically designed to address safety threats posed by lithium-ion batteries(LIBs)exposed to harsh mechanical and environmental *** theoretical framework introduces a novel approach for harnessing the smoothed-particle hydrodynamics(SPH)methodology that incorporates the intricate interplay of non-Newtonian fluid behavior,capturing the fluid-structure coupling inherent to the *** approach is further advanced by adopting an enhanced Herschel-Bulkley(H-B)model to encapsulate the intricate rheology of the MSTF under the influence of the magnetorheological effect(MRE)and shear thickening(ST)*** simulation results show that in the case of cooling,the MSTF is an effective cooling medium for rapidly reducing the *** terms of mechanical abuse,the MSTF solidifies through actively applying the magnetic field during mechanical compression and impact within the battery module,resulting in 66%and 61.7%reductions in the maximum stress within the battery jellyroll,and 31.1%and 23%reductions in the reaction force,*** mechanism effectively lowers the risk of short-circuit *** groundbreaking concepts unveiled in this paper for active protection battery modules are anticipated to be a valuable technological breakthrough in the areas of EV safety and lightweight/integrated design.

关键词： magneto-sensitive shear thickening fluid(MSTF) battery module impact protection temperature control integrated design

Exploring the Core-shell Structure of BaTiO3-based Dielectric Ceramics Using Machine Learning Models and Interpretability Analysis

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 561-569页

作者：孙家乐 xiong Peifeng 郝华 LIU Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and EngineeringInternational School of Material Science and EngineeringWuhan University of TechnologyWuhan 430070China Sanya Science and Education Innovation Park Wuhan University of TechnologySanya 572000China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China

A machine learning(ML)-based random forest(RF)classification model algorithm was employed to investigate the main factors affecting the formation of the core-shell structure of BaTiO_(3)-based ceramics and their interpretability was analyzed by using Shapley additive explanations(SHAP).An F1-score changed from 0.8795 to 0.9310,accuracy from 0.8450 to 0.9070,precision from 0.8714 to 0.9000,recall from 0.8929 to 0.9643,and ROC/AUC value of 0.97±0.03 was achieved by the RF classification with the optimal set of features containing only 5 features,demonstrating the high accuracy of our model and its high *** the interpretability analysis of the model,it was found that the electronegativity,melting point,and sintering temperature of the dopant contribute highly to the formation of the core-shell structure,and based on these characteristics,specific ranges were delineated and twelve elements were finally obtained that met all the requirements,namely Si,Sc,Mn,Fe,Co,Ni,Pd,Er,Tm,Lu,Pa,and *** the process of exploring the structure of the core-shell,the doping elements can be effectively localized to be selected by choosing the range of features.

关键词： machine learning BaTiO_(3) core-shell structure random forest classifier

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输液泵检测中常遇到的问题及解决方法

计量与测试技术 2020年第12期47卷 34-35页

作者：熊继军章婧南京市计量监督检测院江苏南京210046

医用输液泵是一种依靠机械驱动来准确控制输液速度,保证药物能够速度均匀、药量准确并且安全地进入患者体内的一种仪器。在输液泵的检测过程中会有各种因素影响检测结果。本文详细介绍了输液泵检测中经常遇到的问题以及这些问题的解决... 详细信息

医用输液泵是一种依靠机械驱动来准确控制输液速度,保证药物能够速度均匀、药量准确并且安全地进入患者体内的一种仪器。在输液泵的检测过程中会有各种因素影响检测结果。本文详细介绍了输液泵检测中经常遇到的问题以及这些问题的解决方法。

关键词：输液速度报警安全

Genetic regulation of m^(6)A RNA methylation and its contribution in human complex diseases

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Science China(Life Sciences) 2024年第8期67卷 1591-1600页

作者： Kexuan Chen Jiuhong Nan Xushen xiong The Second Affiliated Hospital&Liangzhu Laboratory Zhejiang University School of MedicineHangzhou 311121China State Key Laboratory of Transvascular Implantation Devices The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 311121China

N6-methyladenosine(m^(6)A)has been established as the most prevalent chemical modification in message RNA(mRNA),playing an essential role in determining the fate of RNA *** of m^(6)A has been revealed to lead to abnormal physiological conditions and cause various types of human *** studies have delineated the genetic regulatory maps for m^(6)A methylation by mapping the quantitative trait loci of m^(6)A(m^(6)A-QTLs),thereby building up the regulatory circuits linking genetic variants,m^(6)A,and human complex ***,we review the recent discoveries concerning the genetic regulatory maps of m^(6)A,describing the methodological and technical details of m^(6)A-QTL identification,and introducing the key findings of the cis-and trans-acting drivers of m^(6)*** further delve into the tissue-and ethnicity-specificity of m^(6)A-QTL,the association with other molecular phenotypes in light of genetic regulation,the regulators underlying m^(6)A genetics,and importantly,the functional roles of m^(6)A in mediating human complex ***,we discuss potential research avenues that can accelerate the translation of m^(6)A genetics studies toward the development of therapies for human genetic diseases.

关键词： m^(6)A disease genetics m^(6)A-QTL GWAS

2D MoS_2/高分子纳米复合材料的研究进展

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高分子材料科学与工程 2019年第3期35卷 178-184页

作者：杨海艳熊继军杜栓丽陈晓勇李延斌中北大学山西太原030051

二维二硫化钼(2D MoS_2)是石墨烯之后研究最热的二维材料之一,具有石墨烯类二维材料优异的力学性质和独特的带隙、催化特性,是高分子基纳米复合材料研究的热门材料之一。文中简介了2D MoS_2的微观结构、宏观特性;梳理了2D MoS_2/高分子... 详细信息

二维二硫化钼(2D MoS_2)是石墨烯之后研究最热的二维材料之一,具有石墨烯类二维材料优异的力学性质和独特的带隙、催化特性,是高分子基纳米复合材料研究的热门材料之一。文中简介了2D MoS_2的微观结构、宏观特性;梳理了2D MoS_2/高分子纳米复合材料成型制备方法,主要有熔融共混、溶液共混和原位聚合3种,而原位聚合可以更好地保持2D MoS_2在高分子基体中的分散性;总结了2D MoS_2对高分子基体的改性效果,可以显著改进高分子材料的力学、耐热、阻燃、导电和介电等诸多性能,表明2D MoS_2是一种高效的综合改性剂;分析了2D MoS_2/高分子纳米复合材料在传感、监测、分离、环保、能源、健康医用等许多领域的应用;总结、展望了研发该复合材料的挑战与发展方向。

关键词： 2D MoS2 高分子纳米复合材料改性应用

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介观压阻效应及器件

机械工程学报 2008年第11期44卷 26-33页

作者：张文栋熊继军薛晨阳张斌珍仝召民中北大学电子测试技术国防重点实验室太原030051 中北大学仪器科学与动态测试教育部重点实验室太原030051

介绍GaAs/AlAs/InGaAs双势垒超晶格薄膜结构的介观压阻效应以及几种基于此效应的新型传感器件。阐述介观压阻效应的四个过程,结合空气桥结构和欧姆接触技术,在[001]晶向半绝缘GaAs衬底上加工出来了GaAs/AlAs/InGaAs共振隧穿结构(Resonan... 详细信息

介绍GaAs/AlAs/InGaAs双势垒超晶格薄膜结构的介观压阻效应以及几种基于此效应的新型传感器件。阐述介观压阻效应的四个过程,结合空气桥结构和欧姆接触技术,在[001]晶向半绝缘GaAs衬底上加工出来了GaAs/AlAs/InGaAs共振隧穿结构(Resonant tunneling structures,RTS),并对其进行了加压试验研究,发现其介观压阻灵敏度达到2.54×10^(-9)Pa^(-1),是硅压阻灵敏度的一个数量级以上。采用控制孔技术成功加工出了基于RTS的圆膜压力、四梁加速度和仿生矢量水声三种新型纳机电器件,并分别对其进行了压力罐、振动台和水下驻波测试。结果表明圆膜压力传感器具有较好的力电耦合特性:四梁加速度计的压阻灵敏度随RTS两端偏置电压可调,并在微分负阻区具有最大压阻灵敏度;矢量水听器具有良好的"8"字余弦指向性,灵敏度在1 000 Hz时达到184.6 dB,可以实现水平面内的水下声信号探测。

关键词：介观压阻效应共振隧穿结构纳机电