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云南高校来华留学生趋同化管理认同调查研究

大理大学学报 2024年第9期9卷 123-128页

作者：谢文婷字德照云南师范大学国际汉语教育学院昆明650500 云南师范大学华文学院昆明650500

随着我国高等教育国际化进程的不断推进,趋同化管理是来华留学生教育工作改革的一个倡导思想和发展趋势。后疫情时代,中国各高校也应积极响应政策,摸索来华留学生的趋同化管理方式与路径。在实践过程中,来华留学生和中国学生是高校趋同... 详细信息

随着我国高等教育国际化进程的不断推进,趋同化管理是来华留学生教育工作改革的一个倡导思想和发展趋势。后疫情时代,中国各高校也应积极响应政策,摸索来华留学生的趋同化管理方式与路径。在实践过程中,来华留学生和中国学生是高校趋同化管理的两个主要关系群体,其对趋同化管理的认同直接影响趋同化管理的实施成效。通过对云南某高校进行个案研究,采用混合研究法调查分析,以中外学生双重视角审视来华留学生趋同化管理认同情况,为推进高校趋同化管理提供更具针对性和实践意义的参考。

关键词：来华留学教育趋同化管理认同研究

Examining the“revisability”benefit of hip resurfacing arthroplasty

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World journal of Orthopedics 2024年第6期15卷 554-559页

作者： jose George Adam j Taylor Thomas p Schmalzried Department of Orthopedics Harbor UCLA Medical CenterTorranceCA 90509United States

BACKGROUND Hip resurfacing arthroplasty(HRA)is an alternative to total hip arthroplasty(THA)that is typically reserved for young active patients because it preserves ***,the benefits of HRA only hold true if conversion THA after failed HRA provides acceptable *** To compare patient reported outcomes for conversion THA after HRA failure to primary *** A retrospective review of 36 patients(37 hips)that underwent conversion THA for failed HRA between October 2006 and May 2019 by a single surgeon was *** reported outcomes[modified Harris Hip Score(mHHS),University of California Los Angeles(UCLA)activity score]were obtained via an email-based responder-anonymous *** were compared to normative data of a primary THA cohort with similar *** analysis was performed comparing outcomes of conversion THA for adverse local tissue reaction(ALTR)vs all other causes for *** The study group had a lower mHHS than the control group(81.7±13.8 vs 90.2±11.6,pps had similar UCLA activity levels(7.5±2.3 vs 7.2±1.6,p=0.51).patients that underwent conversion for non-ATLR causes had similar mHHS(85.2±11.5 vs 90.2±11.6,p=0.11)and higher UCLA activity levels(8.5±1.8 vs 7.2±1.6,ppared to the control *** that underwent conversion for ATLR had worse mHHS(77.1±14.5 vs 90.2±11.6,pp=0.05)when compared to the control *** patient outcomes equivalent to primary THA can be achieved following HRA conversion to ***,inferior outcomes were demonstrated for ALTR-related HRA *** selection and perhaps further studies examining alternative HRA bearing surfaces should be considered.

关键词： Total hip arthroplasty Hip resurfacing arthroplasty Conversion total hip arthroplasty Adverse local tissue reaction patient reported outcome measures

不同类型钢纤维UHpC无腹筋梁受剪性能试验

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桂林理工大学学报 2024年第1期44卷 67-74页

作者：曹霞任义成廉德铭金凌志李丽何达波桂林理工大学广西建筑新能源与节能重点实验室广西桂林541004 江苏大学京江学院材料与土木工程学院江苏镇江212000 桂林电子科技大学基建处广西桂林541004

基于单点加载下4根超高性能混凝土无腹筋梁构件受剪破坏试验结果,研究其受剪性能,以钢纤维类型为主要研究参数,分析钢纤维类型对无腹筋梁的受剪承载力、裂缝发展形态、挠度和韧性等发展规律。结果表明:端钩型钢纤维对提高超高性能混凝... 详细信息

基于单点加载下4根超高性能混凝土无腹筋梁构件受剪破坏试验结果,研究其受剪性能,以钢纤维类型为主要研究参数,分析钢纤维类型对无腹筋梁的受剪承载力、裂缝发展形态、挠度和韧性等发展规律。结果表明:端钩型钢纤维对提高超高性能混凝土无腹筋梁的受剪承载力、阻滞裂缝发展及控制试件变形能力作用优于光滑平直型和波浪型钢纤维,而端钩型Ⅱ钢纤维优于端钩型Ⅰ钢纤维;端钩型Ⅰ和光滑平直型钢纤维增韧效果较好,但分担纵筋拉力较少;波浪型钢纤维分担纵筋拉力较多,提高超高性能混凝土无腹筋梁抗裂性的效果较好,但增韧效果较差。经对比分析,陈璇公式计算值精确度较高,离散程度小。

关键词：超高性能混凝土梁钢纤维类型受剪承载力裂缝韧性

基于知识图谱的复杂薄壁零件机械加工工艺知识建模研究

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航空制造技术 2024年第11期67卷 76-86页

作者：肖彪徐宝德彭仕鑫尉渊丁国智王萌赵正彩南京航空航天大学南京210016 北京星航机电装备有限公司北京100074

智能工艺设计是数字孪生环境下工艺设计的核心,零件工艺知识建模是实现基于数字孪生的智能工艺设计的前提。为此,针对航空航天领域复杂薄壁零件机械加工工艺数据结构化程度低、难以重用的问题,提出了典型复杂薄壁零件机械加工工艺知识... 详细信息

智能工艺设计是数字孪生环境下工艺设计的核心,零件工艺知识建模是实现基于数字孪生的智能工艺设计的前提。为此,针对航空航天领域复杂薄壁零件机械加工工艺数据结构化程度低、难以重用的问题,提出了典型复杂薄壁零件机械加工工艺知识图谱的构建和质量评估方法。首先,对机械加工工艺知识组成和结构进行分析。其次,通过本体建模、知识抽取、知识储存等相关技术实现了工艺知识的可视化表征,并基于Neo4j图数据库实现机械加工工艺知识检索。最后,利用层次分析法对构建完成的知识图谱进行评估,并以框段类零件的机械加工工艺知识为验证对象,得到子图谱的综合准确度为92.28%。试验结果表明,基于知识图谱的工艺知识建模方法切实可行,有助于实现工艺知识的有效组织和重用,为数字孪生的智能工艺设计奠定基础。

关键词：复杂薄壁零件知识图谱工艺知识建模数据抽取图谱质量评估数字孪生

The initial stages of Li_(2)O_(2) formation during oxygen reduction reaction in Li-O_(2) batteries:The significance of Li_(2)O_(2) in charge-transfer reactions within devices

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journal of Energy Chemistry 2024年第1期88卷 223-231,I0006页

作者： Daniela M.josepetti Bianca p.Sousa Simone A.j.Rodrigues Renato G.Freitas Gustavo Doubek Advanced Energy Storage Division LABCenter for Innovation on New EnergiesSchool of Chemical EngineeringUniversity of CampinasAv Albert Einstein 50013083-852CampinasSPBrazil Institute of physics&Department of Chemistry Laboratory of Computational MaterialsFederal University of Mato Grosso78060-900CuiabáMTBrazil

Lithium-oxygen batteries are a promising technology because they can greatly surpass the energy density of lithium-ion ***,this theoretical characteristic has not yet been converted into a real device with high *** with air contamination,metallic lithium reactivity,and complex discharge and charge reactions are the main issues for this technology.A fast and reversible oxygen reduction reaction(ORR)is crucial for good performance of secondary batteries',but the partial knowledge of its mechanisms,especially when devices are concerned,hinders further *** this perspective,the present work uses operando Raman experiments and electrochemical impedance spectroscopy(EIS)to assess the first stages of the discharge processes in porous carbon electrodes,following their changes cycle by cycle at initial operation.A growth kinetic formation of the discharge product signal(Li_(2)O_(2))was observed with operando Raman,indicating a first-order reaction and enabling an analysis by a microkinetic *** solution mechanism in the evaluated system was ascribed for an equivalent circuit with three time *** the time constant for the anode interface reveals to remain relatively constant after the first discharge,its surface seemed to be more *** model indicated that the reaction occurs at the Li_(2)O_(2) surface,decreasing the associated resistance during the initial discharge ***,the growth of Li_(2)O_(2) forms a hetero-phase between Li_(2)O_(2)/electrolyte,while creating a more compact and homogeneous on the Li_(2)O_(2)/cathode *** methodology here described thus offers a way of directly probing changes in surface chemistry evolution during cycling from a device through EIS analysis.

关键词： Li-O_(2)battery Operando Raman analysis Equivalent circuit modeling Time-constant distribution

基于HSA-SVR的压电式车削测力仪多维力解耦

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仪表技术与传感器 2024年第6期 26-29,36页

作者：张军蔡佳乐王郁赫滕玄德张鹏王尊豪大连理工大学高性能精密制造全国重点实验室

文中针对压电式多维力测力仪向间干扰大,制约测量精度的问题,分析了向间干扰对测力仪测量精度的影响,提出了一种基于支持向量回归机(SVR)的非线性解耦算法。利用混合模拟退火算法(HSA)对SVR进行参数寻优,对比并分析了HSA-SVR和线性最小... 详细信息

文中针对压电式多维力测力仪向间干扰大,制约测量精度的问题,分析了向间干扰对测力仪测量精度的影响,提出了一种基于支持向量回归机(SVR)的非线性解耦算法。利用混合模拟退火算法(HSA)对SVR进行参数寻优,对比并分析了HSA-SVR和线性最小二乘解耦法(LS)的解耦性能,证明经该方法解耦后向间干扰最大为0.526%,非线性误差最大为0.214%,HSA-SVR具有更好的非线性解耦效果。

关键词：压电测力仪多维力测量支持向量回归机非线性解耦方法融合算法

煤中惰质组及其古环境意义:来自AI和大数据分析的启示

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中国科学：地球科学 2024年第6期54卷 1806-1829页

作者：邵龙义周家民 Timothy p.jONES 华芳辉徐小涛闫志明侯海海王东东鲁静中国矿业大学(北京)煤炭精细勘探与智能开发全国重点实验室中国矿业大学(北京)地球科学与测绘工程学院北京100083 School of Earth and Environmental Sciences Cardiff UniversityCardiffCF103YEWalesEngland 中国煤炭地质总局勘查研究总院北京100039 潍坊学院土木与交通学院潍坊261061 辽宁工程技术大学矿业学院阜新123000 山东科技大学地球科学与工程学院青岛266590

惰质组是煤中常见且重要的显微组分组,作为古野火指示物在古环境研究中发挥着至关重要的作用,古野火在多种生态系统中扮演着不可替代的角色.通过惰质组来讨论古野火与古气候变化及古植物演化的研究逐年增多.丝质体和半丝质体的反射率可... 详细信息

惰质组是煤中常见且重要的显微组分组,作为古野火指示物在古环境研究中发挥着至关重要的作用,古野火在多种生态系统中扮演着不可替代的角色.通过惰质组来讨论古野火与古气候变化及古植物演化的研究逐年增多.丝质体和半丝质体的反射率可以用来估算古野火的燃烧温度及类型,进而判断不同类型野火的燃烧特征.惰质组的相对丰度可以重建大气氧含量.人工智能(AI)和科学数据库的在线搜索工具的快速发展,使得查找、收集、整理和分析从最老到最新的出版物,以及出版物中的全球惰质组数据成为可能.本文使用数据提取工具Deep Shovel收集分析从志留纪到新近纪的全球惰质组数据,然后应用Gplates、ArcGIS pro、Tableau等多个软件建立地质历史时期惰质组相对丰度的变化模型,该模型可以与其他因素如大气氧含量、植物进化及古气候变化等进行关联.惰质组在地质历史中的分布特征差异很大,二叠纪属于典型的“高惰质组含量-高大气氧含量”时期,新生代属于典型的“低惰质组含量-低大气氧含量”时期.本文提出惰质组特征与古环境因素之间的可能性正负反馈关系,揭示出惰质组在地质古环境演化研究中发挥着不可替代的作用.未来惰质组相关研究应该聚焦在有机岩石学和有机地球化学的深入结合,大数据驱动的惰质组时、空分布特征,古野火在不同气候背景下的地球系统中发挥的作用以及融合现代野火研究预测未来由于气候变化导致的野火发生的频率和强度.

关键词：惰质组古野火大气氧含量古气候古生态系统

Effect of stress-dependent microannulus aperture on well leakage

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journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 1967-1976页

作者： Meng Meng Luke p.Frash j.William Carey Mohamed Mehana Wenfeng Li Bailian Chen Earth and Environmental Sciences Los Alamos National LaboratoryLos AlamosNMUSA

Debonding at the cement-casing interface is recognized as a principal failure mechanism leading to CO_(2) leakage in *** detachment gives rise to a microannulus,which notably possesses greater permeability than undamaged cement,undermining its sealing ***,the permeability of the microannulus is regarded as a uniform value throughout the ***,fundamentally,a microannulus is one type of fracture,and its gap or aperture size is affected by the effective *** this work,we developed a unique experimental *** equipment facilitates the curing of cement inside a steel casing,the formation of a microannulus between the casing and the cement,and the investigation of the fluid flow dynamics along the microannulus under laboratory-replicated in situ *** microannulus was formed by injecting fluid from one end of the setup,and receiving similar amount of fluid on the other end signified the development of the leakage ***,strain gauges affixed to the casing’s external surface yielded key information on the microannulus’s opening and *** observed a noticeable decline in microannulus hydraulic aperture(or permeability)in relation to effective stress and an exponential equation fits their *** findings also indicate a distinct behavior when comparing liquid CO_(2) with ***,it is easier for liquid CO_(2) to create the ***,the hydraulic aperture range for this microannulus(0.7-6 mm)is considerably smaller than that created by water flow(2-17 mm).Finally,we integrated the stressdependent microannulus aperture size into the combined analysis of well mechanical integrity and well *** outcomes consistently demonstrated that when factoring in the stress-dependent aperture sizes,the leakage rates are 3e5 times compared to a fixed aperture *** traditional assumption of a constant aperture significantly underestimates fluid leakage risks.

关键词： Microannulus Leakage assessment Aperture size Triaxial experiment Carbon sequestration

Error field penetration in j-TEXT tokamak based on two-fluid drift-MHD model

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Chinese physics B 2024年第4期33卷 545-551页

作者：王文徐涛张仪 the j-TEXT team State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma PhysicsSchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

An externally generated resonant magnetic perturbation can induce complex non-ideal MHD responses in their resonant *** have studied the plasma responses using Fitzpatrick's improved two-fluid model and program *** calculated the error field penetration threshold for *** addition,we find that the island width increases slightly as the error field amplitude increases when the error field amplitude is below the critical penetration ***,the island width suddenly jumps to a large value because the shielding effect of the plasma against the error field disappears after the *** scanning the natural mode frequency,we find that the shielding effect of the plasma decreases as the natural mode frequency ***,we obtain the m/n=2/1 penetration threshold scaling on density and temperature.

关键词： plasma responses drift-MHD model error field penetration