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Solvothermal Synthesis and Characterization of Sheet Structure Containing Adamantane [Hg_2Sn_2S_(10)]^(8-) Anions

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Chemical Research in Chinese Universities 2011年第6期27卷 915-918页

作者： BAIYIN Meng-he LIANG Feng-ying XU Xiao-qing ta Na NA Mi-la BAI Wu-yun BAO Yong-sheng College of Chemistry and Environmental Science Inner Mongolia Normal University Huhhot 010022 P. R. China Inner Mongolian Key Laboratory for Physics and Chemistry of Functional Materials Inner Mongolia Normal University Huhhot 010022 P. R. China

Sheet Rb2HgSnS4 was synthesized solvothermally and characterized by X-ray single crystal diffraction. The compound is comprised of sheets with admantane-like [Hg2Sn2S10]8– units. The crystals belong to the space group C2/c, with the unit cell parameters a=1.1063（2） nm, b=1.1071（2） nm, c=1.5741（3） nm, a=90o, β=100.13（3）o, γ=90o. A reflectance spectroscopy study reveals the nature of the semiconductor with an energy of 2.1 eV for the compound.

关键词： Solvothermal synthesis Quaternary thiostannate Sheet structure

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非晶硅薄膜晶化微观组织调控发展现状

电子元件与材料 2024年第8期43卷 899-907页

作者：侯君祎马晓波王宁杨塔宁夏大学物理学院宁夏银川750021 西北稀有金属材料研究院宁夏有限公司稀有金属特种材料国家重点实验室宁夏石嘴山753000

非晶硅薄膜晶化微观组织调控是实现微电子器件性能提升的关键。比较分析了辅助外场、界面调控、掺杂调控和工艺参数等非晶硅薄膜晶化微观组织调控技术方法,重点阐述了辅助外场的大小、方向以及作用时间等对晶体硅生长方向和速率的影响... 详细信息

非晶硅薄膜晶化微观组织调控是实现微电子器件性能提升的关键。比较分析了辅助外场、界面调控、掺杂调控和工艺参数等非晶硅薄膜晶化微观组织调控技术方法,重点阐述了辅助外场的大小、方向以及作用时间等对晶体硅生长方向和速率的影响。此外,详细分析了界面层成分、厚度、结构等引起的晶化硅薄膜微观组织结构差异以及掺杂浓度、衬底类型等对非晶硅薄膜晶化微观组织的影响。结果有助于深入理解非晶硅薄膜晶化机理,进而有益于优化晶化硅薄膜制备工艺和器件性能提升。

关键词：非晶硅薄膜晶化综述微观组织

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Opinions of Students on the Contribution of the DIVA 3D Virtual Dissection table to the Teaching of Anatomy at the Faculty of Medicine and Odontostomatology of Bamako

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Forensic Medicine and Anatomy Research 2024年第2期12卷 13-25页

作者： Abdoulaye Kanté tata Touré Ousmane Toumany Chérif Haidara Uhl Jean François Mariam Daou Mamadou A. Keita Bakary Keïta Bréhima Bengaly Drissa Traoré Adégné Togo Nouhoum Ongoïba Faculty of Medicine and Odontostomatology of Bamako Bamako Mali University of Paris Descartes Paris France Department of Neurology The Gabriel Tour&#233 University Hospital Bamako Mali Department of General Surgery The Kati Health Center Bamako Mali Anesthesia-Resuscitation Service Commune I Reference Health Center Bamako Bamako Mali Department of General Surgery The Gabriel Tour&#233 University Hospital Bamako Mali

Objective: Study the contribution of the DIVA 3D dissection table in the teaching of anatomy at the Faculty of Medicine and Odontology of Bamako. Material and Methods: This was a qualitative study carried out from November 1 to December 30, 2023 at the clinical and morphological anatomy laboratory of the Faculty of Medicine and Odontostomatology of Bamako. Included in this study were students who participated in practical and tutorial sessions. The variables studied during this study were: the previous performance of dissection on a cadaver by the students, the opinion of the students on dissection on a cadaver, the replacement of dissection on a cadaver by virtual dissection in the absence of a body, the level student satisfaction. Results: We surveyed 130 participants. The average age was 22 ± 0.2 years with extremes of 17 and 29 years. 95.3% of participants were students. According to 66.7% of participants, virtual dissection is a good palliative in the absence of a corpse. 95.3% of participants found using the virtual dissection table easy with an average of 7.88 ± 1.4. The overall assessment was well rated by 99.3% of participants. Conclusion: According to the results of this study, the virtual dissection table should be improved by integrating commented videos. The use of the DIVA 3D virtual dissection table during practical and tutorial sessions is well appreciated by the students. We believe that the teaching of anatomy using 3D digital technology should be included in the study programs of the Faculty of Medicine and Odontostomatology.

关键词： Student Opinion Contribution DIVA 3D Virtual Dissection table Anatomy Teaching FMOS

基于宽带相干信号子空间方法的超声导波长骨评价

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仪器仪表学报 2024年第6期45卷 166-176页

作者：周鲜成李鹏飞李杰李义方他得安湖南工商大学智能工程与智能制造学院长沙410205 华南理工大学电子与信息学院广州510641 复旦大学工程与应用技术研究院上海200433

超声导波对长骨的生物力学特性敏感,已经广泛应用于长骨的健康评价。由于骨骼的高衰减特性,准确估计长骨中宽带相干导波信号的频散模式,进而准确反演长骨材料特征参数,是骨超声领域的一个研究热点和难点。本文提出了一种基于宽带相干信... 详细信息

超声导波对长骨的生物力学特性敏感,已经广泛应用于长骨的健康评价。由于骨骼的高衰减特性,准确估计长骨中宽带相干导波信号的频散模式,进而准确反演长骨材料特征参数,是骨超声领域的一个研究热点和难点。本文提出了一种基于宽带相干信号子空间的导波波数估计方法,高精度提取导波频散模式;在此基础上,应用具有全局优化特性的蚁群算法从导波模式中估计长骨材料参数,成功实现了对长骨状况的定量评价。仿真和离体实验(2块仿真样本和2块离体牛骨)共同验证了方法的有效性,实验频散与参考频散之间的相对误差分别为3.52%,3.83%,3.35%,4.51%;对于离体牛骨,皮质骨厚度、纵波速度、横波速度估计值与参考值之间的平均相对误差分别为3.10%,0.11%,0.03%。综上,本文提出的方法为定量超声长骨评价提供了新的借鉴,也可应用于其他固体波导频散的高精度提取和结构健康表征。

关键词：超声导波长骨评价宽带相干信号子空间频散提取

基于广义可扩展RPCA滤波的超快超声脑血流与功能成像方法研究

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仪器仪表学报 2024年第6期45卷 188-197页

作者：吴浩田闫少渊许凯亮他得安复旦大学生物医学工程系上海200438 复旦大学脑科学前沿科学中心上海200432 复旦大学集成芯片与系统全国重点实验室上海201203 上海波达医疗科技有限公司上海200433

开发高分辨和高灵敏度的小血管可视化技术,对相关组织病变的早期诊断和治疗监测具有重要的临床意义。不同于传统聚焦超声,超快超声多普勒(μDoppler)成像技术凭借数千帧的成像帧率,可检测到小血流的瞬时变化。组织杂波滤除和噪声抑制对... 详细信息

开发高分辨和高灵敏度的小血管可视化技术,对相关组织病变的早期诊断和治疗监测具有重要的临床意义。不同于传统聚焦超声,超快超声多普勒(μDoppler)成像技术凭借数千帧的成像帧率,可检测到小血流的瞬时变化。组织杂波滤除和噪声抑制对于μDoppler的成像质量至关重要。常用的杂波滤除方法为奇异值分解(SVD)方法,该方法利用信号时空相干性差异可快速实现组织杂波和血流信号分离,然而无法有效抑制噪声。本研究创新性提出了一种基于广义可扩展的鲁棒主成分分析(GSRPCA)的杂波滤除方法,使用Schatten p范数和lq范数来加强鲁棒主成分分析(RPCA)模型的低秩约束和稀疏约束,增强了小血流信号的提取能力。大鼠脑血流成像结果表明,GSRPCA能够提升功率多普勒成像中血管的成像质量,相较SVD提高信噪比约20 dB,且提高对比噪声比约10 dB。大鼠超声脑功能成像结果表明,GSRPCA能够提升小血管血容量动态检测的灵敏度。相关方法对超快超声成像杂波滤除的研究具有一定借鉴意义。

关键词：超快超声杂波滤除广义可扩展RPCA 脑血流功能成像

Impact of chosen force fields and applied load on thin film lubrication

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Friction 2021年第5期9卷 1259-1274页

作者： Thi D.ta Hien D.ta Kiet A.TIEU Bach H.TRAN School of Mechanical MaterialsMechatronicsand Biomedical EngineeringUniversity of WollongongNSW 2522Australia Ho Chi Minh City University of Technology and Education Ho Chi Minh City 800010Vietnam

The rapid development of molecular dynamics(MD)simulations,as well as classical and reactive atomic potentials,has enabled tribologists to gain new insights into lubrication performance at the fundamental ***,the impact of adopted potentials on the rheological properties and tribological performance of hydrocarbons has not been researched *** extensive study analyzed the effects of surface structure,applied load,and force field(FF)on the thin film lubrication of *** lubricant film became more solid‐like as the applied load *** particular,with increasing applied load,there was an increase in the velocity slip,shear viscosity,and *** degree of ordering structure also changed with the applied load but rather *** was also significantly dependent on the surface *** chosen FFs significantly influenced the lubrication performance,rheological properties,and molecular *** adaptive intermolecular reactive empirical bond order(AIREBO)potential resulted in more significant liquid‐like behaviors,and the smallest velocity slip,degree of ordering structure,and shear stress were compared using the optimized potential for liquid simulations of united atoms(OPLS‐UAs),condensed‐phase optimized molecular potential for atomic simulation studies(COMPASS),and ***,classical potentials,such as OPLS‐UA and COMPASS,exhibit more solid‐like behavior than reactive potentials ***,owing to the solid‐like behavior,the lubricant temperatures obtained from OPLS‐UA and COMPASS were much lower than those obtained from AIREBO and *** increase in shear stress,as well as the decrease in velocity slip with an increase in the surface potential parameterζ,remained conserved for all chosen FFs,thus indicating that the proposed surface potential parameterζfor the COMPASS FF can be verified for a wide range of atomic models.

关键词： molecular dynamics simulation force fields applied load tribofilm hydrocarbon

提质培优背景下农类高职院校“双师型”教师队伍建设路径研究

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创新创业理论研究与实践 2024年第13期7卷 140-142页

作者：他淑君郑芳福建农业职业技术学院福建福州350000

提升高职院校教师“双师”素质是职业教育“三教”改革攻坚的必然要求,也是职业教育提质培优行动计划实施的重要内容。农类高职院校是培养“三农”发展所需技术技能型人才的重要基地,“双师型”教师队伍建设是培养高素质技术技能型人才... 详细信息

提升高职院校教师“双师”素质是职业教育“三教”改革攻坚的必然要求,也是职业教育提质培优行动计划实施的重要内容。农类高职院校是培养“三农”发展所需技术技能型人才的重要基地,“双师型”教师队伍建设是培养高素质技术技能型人才的关键。该文挖掘提质培优行动计划赋予农类高职院校“双师型”教师能力的新内涵,分析农类高职院校“双师型”教师队伍建设面临的问题,从3个方面提出农类高职院校“双师型”教师队伍建设策略,为进一步推动新阶段农类高职院校“双师型”教师队伍建设提供一定借鉴。

关键词：提质培优农类高职院校 “双师型”教师能力内涵困境建设路径

Unit-cell design for two-dimensional phase-field simulation of microstructure evolution in single-crystal Ni-based superalloys during solidification

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Progress in Natural Science:Materials International 2017年第6期27卷 678-686页

作者： Dongjia Cao Na ta Lijun Zhang State Key Lab of Powder Metallurgy Central South University Interdisciplinary Centre for Advanced Materials Simulation (ICAMS) Ruhr-University Bochum

Phase-field simulation serves as an effective tool for quantitative characterization of microstructure evolution in single-crystal Ni-based superalloys during solidification nowadays. The classic unit cell is either limited to γdendrites along crystal orientation or too ideal to cover complex morphologies for γ dendrites. An attempt to design the unit cell for two-dimensional(2-D) phase-field simulations of microstructure evolution in single-crystal Ni-based superalloys during solidification was thus performed by using the MICRESS(MICRostructure Evolution Simulation Software) in the framework of the multi-phase-field(MPF) model,and demonstrated in a commercial TMS-113 superalloy. The coupling to CALPHAD(CALculation of PHAse Diagram) thermodynamic database was realized via the TQ interface and the experimental diffusion coefficients were utilized in the simulation. Firstly, the classic unit cell with a single γ dendrite along crystal orientation was employed for the phase-field simulation in order to reproduce the microstructure ***, such simple unit cell was extended into the cases with two other different crystal orientations, i.e., and . Thirdly, for crystal orientations, the effect of γ dendritic orientations and unit cell sizes on microstructure and microsegregation was comprehensively studied, from which a new unit cell with multiple γdendrites was proposed. The phase-field simulation with the newly proposed unit cell was further performed in the TMS-113 superalloy, and the microstructure features including the competitive growth of γ dendrites,microsegregation of different solutes and distribution of γ′ grains, can be nicely reproduced.

关键词： Ni-based superalloys Solidification Microstructure Phase-field simulation Unit cell

Effect of thermal oxidation on the surface characteristics and corrosion behavior of a ta-implanted Ti-50.6Ni shape memory alloy

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International Journal of Minerals,Metallurgy and Materials 2012年第12期19卷 1134-1141页

作者： sheng-nan Wang Yan Li Ting-ting Zhao School of Materials Science and Engineering Beihang University Beijhag 100191 China Beijing Key Laboratory for Advanced Functional Materials and Thin Film Technology Beihang University Beijing 100191 China Key Laboratory of Aerospace Materials and Performance (Ministry of Education) Beihang University Beijing 100191 China

A NiTi shape memory alloy （SMA） modified by ta ion implantation was subjected to oxidation treatment in air at 723 and 873 K. Atomic force microscopy （AFM）, Auger electron spectroscopy （AES）, and grazing incidence X-ray diffraction （GIXRD） measurements were conducted to investigate the surface characteristics, including surface topography, elemental depth profiles, and surface phase structures. The surface roughness of the ta-implanted NiTi increases after oxidation, and the higher the oxidation temperature is, the larger the value is. The surface of the ta-implanted NiTi oxidized at 723 K is a nanolayer mainly composed of TiO2/ta2O5 and TiO with depressed Ni content. The ta-implanted NiTi oxidized at 873 K is mainly covered by rutile TiO2 in several micrometers of thickness. Potentiodynamic polarization tests indicated that the corrosion resistance of the ta-implanted NiTi was improved after thermal oxidation at 723 K, but a negative impact was found for the ta-implanted NiTi oxidized at 873 K.

关键词： nickel alloys titanium alloys shape memory effect ion implantation oxidation corrosion resistance