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Nano Research 2024年第1期17卷 372-381页

作者： Zhen Su§ Depeng Li§ Lixin Zhang Si Tian Yuhong Su Xiaoyun Hu duan xiong Qingqing Guan Key Laboratory of Oil and Gas Fine Chemicals Ministry of Education College of Chemical EngineeringXinjiang UniversityUrumqi 830017China

Smart materials that integrate multi-stimuli response,full reversibility,and dual-visual read-out channel are highly desired for anticounterfeiting and information encryption ***,we developed a multiresponsive perchlorate terpyridyl Pt(Ⅱ)nano complex which could undergo fully reversible conversion between three forms stimulated by water or formaldehyde molecule due to the extent of Pt–Pt ***,a dual-visual channel,i.e.,the colorimetric channel changed from yellow to orange or red and the corresponding luminescent channel from orange to orange-red or red,has also been *** weak and equivalent strength of ion-dipole interaction and hydrogen bond that generated between formaldehyde/water and Pt(II)salt result in the easy-control reversibility between the three ***,by introducing different polymer matrices,1Cl·ClO_(4)@PMMA(1Cl·ClO_(4):[Pt(tpy)Cl]·ClO4,tpy:2,2':6',2''-terpyridine),PMMA:poly(methyl methacrylate))and 1Cl·ClO4@PVA(PVA:polyvinyl alcohol)are successfully constructed,which exhibit different reversible behaviors since the PMMA and PVA matrix exert different influences on the strength of *** smart Pt(II)salt nanostructures present great potential for high-security-level anticounterfeiting application.

关键词： Pt(II)complex multiresponse reversibility anticounterfeiting information encryption

Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

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Rare Metals 2021年第2期40卷 471-477页

作者： Min-Hui Yang Chong-xiong duan Xin-Juan Zeng Jing-Jing Li Cui-Yin Liu Long-Jiao Zeng Yi Zhang Kai Wang Hong-Xia Xi School of Materials Science and Hydrogen Energy Foshan UniversityFoshan528231China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou510640China School of Energy Sciences and Engineering Nanjing Tech UniversityNanjing211816China School of Electrical Engineering Qingdao UniversityQingdao266061China

The development of a simple and facile synthesis route is a highly desirable but challenging process in the fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks(ZIFs).Herein we describe a facile method for rapidly synthesizing hierarchically porous ZIF-90 nanocrystals(particle sizes of~300 nm)using hydroxyl double salts as intermediates at room *** as-synthesized ZIF-90 contained hierarchical porous structures developed using a crystalline interior and a random stack of multiple *** the morphology and particle size of ZIF-90 nanocrystals could be tuned by controlling the molar ratio of ICA/Zn^(2+).Note that the as-synthesized hierarchically porous ZIF-90 nanocrystals exhibited higher thermal stability compared with the conventional *** of the introduction of hierarchical porous structures,the resultant hierarchically porous ZIF-90 nanocrystals showed enhanced toluene adsorption capacity than those of conventional metal organic frameworks and zeolites.

关键词： Zeolitic imidazolate framework-90 Nanoscale Green and rapid synthesis Hierarchical porous structure Enhanced toluene adsorption

Modification of Ti_(3)C_(2) MXene nanosheets with tunable properties using a post-processing method

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Rare Metals 2022年第9期41卷 3100-3106页

作者： Zhi-Hong Chen Ze-Na Zhang Hai-Qi Zhang Die Hu Zhi-Bin Ye Yi Zhang Yi Yu Bao-Hua Nie Hong-Xia Xi Chong-xiong duan School of Materials Science and Hydrogen Engineering Foshan UniversityFoshan528231China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou510640China Guangdong Key Laboratory for Hydrogen Energy Technologies Foshan UniversityFoshan528000China School of Energy Sciences and Engineering Nanjing Tech UniversityNanjing211816China

MXenes are a family of two-dimensional(2D)transition metal carbides and nitrides with many intriguing properties and applications,many of which require surface ***,as-synthesized Ti_(3)C_(2) was modified using different treatments(acid and base treatments)and then characterized by a complementary combination of X-ray powder diffraction(XRD),scanning electron microscopy(SEM),Fourier-transform infrared spectroscopy(FTIR),nitrogen adsorption-desorption isotherms,and pore size distribution *** results indicated that the structure and surface properties of the obtained Ti_(3)C_(2) could be tuned using various *** modification methods developed in this study may offer a new direction for tuning the structure and surface properties of MXenes for a wide range of applications.

关键词： MXenes Surface modification Acid treatment Base treatment

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热力辅助高压水射流超细粉碎矿物实验

北京工业大学学报 2007年第12期33卷 1257-1261,1266页

作者：付胜朱全段雄北京工业大学机械工程与应用电子技术学院北京100022 中国矿业大学机电工程学院江苏徐州221008

提出了一种将矿物超细粉碎的方法,首先使矿物经加热、骤冷,再用高压水射流技术进行最终粉碎.通过高压水射流粉碎技术和热力辅助高压水射流粉碎技术对煤、高岭土超细粉碎进行实验研究,结果表明,两种粉碎方法都可以实现对煤、高岭土的超... 详细信息

提出了一种将矿物超细粉碎的方法,首先使矿物经加热、骤冷,再用高压水射流技术进行最终粉碎.通过高压水射流粉碎技术和热力辅助高压水射流粉碎技术对煤、高岭土超细粉碎进行实验研究,结果表明,两种粉碎方法都可以实现对煤、高岭土的超细粉碎,后者较前者粒度更小,粒度分布更窄,而且在获得相同粒度的条件下,后者可大幅度地降低水射流的工作压力;热处理在颗粒表面产生的裂纹粉碎效果明显.热力辅助高压水射流技术是一种有效的超细粉碎方法.

关键词：热力高压水射流超细粉碎热冲击裂纹

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水射流喷丸强化残余应力场的有限元模拟

机械工程学报 2010年第18期46卷 189-194页

作者：董星张海录段雄黑龙江科技学院机械工程学院哈尔滨150027 中国矿业大学机电工程学院徐州221008

针对水射流的高湍动特性与受喷靶体材料复杂的弹塑性形变行为,提供一种水射流喷丸强化残余应力场的有限元分析方法。基于准静态压力分布和非线性轴对称面分布载荷,采用多线性各向同性强化的Mises率不相关弹塑性模型,应用Prandtl-Reuss... 详细信息

针对水射流的高湍动特性与受喷靶体材料复杂的弹塑性形变行为,提供一种水射流喷丸强化残余应力场的有限元分析方法。基于准静态压力分布和非线性轴对称面分布载荷,采用多线性各向同性强化的Mises率不相关弹塑性模型,应用Prandtl-Reuss塑性增量理论及增量初应力法,利用线性斜坡载荷加载制度,运用ANSYS有限元软件模拟不同压力作用下水射流喷丸在2A11铝合金材料表层产生的残余应力场,获得残余应力场的分布规律及残余应力沿层深和径向的变化规律,指出残余应力沿层深分为残余压应力区和残余拉应力区,沿径向分为第Ⅰ残余压应力区、残余拉应力区和第Ⅱ残余压应力区,得到表面残余压应力、表层最大残余压应力、残余压应力层深度随着喷丸压力的增加而增大。为验证有限元模拟的正确性,对喷丸表面残余压应力进行试验验证,结果表明,有限元法计算的表面残余压应力值与试验数据近似吻合。

关键词：水射流喷丸有限元法数值模拟残余应力场

前混合水射流多弹丸喷丸模型及残余应力场的数值模拟

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机械工程学报 2020年第4期56卷 224-232页

作者：董星刘雨庆段雄黑龙江科技大学机械工程学院哈尔滨150022 中国矿业大学电气与动力工程学院徐州221116

针对前混合水射流的液固湍动特性与喷丸过程多重非线性耦合作用行为,提供一种射流喷丸强化残余应力场的有限元分析法。采用液固两相流动理论与计算流体动力学方法分析喷嘴内流特性,建立射流多弹丸喷丸模型;基于弹丸速度冲击载荷加载制度... 详细信息

针对前混合水射流的液固湍动特性与喷丸过程多重非线性耦合作用行为,提供一种射流喷丸强化残余应力场的有限元分析法。采用液固两相流动理论与计算流体动力学方法分析喷嘴内流特性,建立射流多弹丸喷丸模型;基于弹丸速度冲击载荷加载制度,利用多线性各向同性强化弹塑性模型,应用动态接触对称罚函数法,运用ABAQUS软件模拟不同弹丸数量作用下射流喷丸在45钢材料表层产生的残余应力场,获得残余应力场的分布规律及残余应力沿深度的变化规律;得出射流喷嘴内流呈均质流流型,不同弹丸数量射流喷丸在材料表层产生的径向残余应力沿深度的变化规律相同,但在材料表面产生的径向残余压应力值受喷丸模型影响较大,对弹丸分三层排列、相邻弹丸之间径向和周向中心距离均为弹丸半径的多弹丸喷丸模型,数值模拟获得的表面径向残余压应力值与射流喷丸试验数据基本吻合。

关键词：前混合水射流喷丸强化喷丸模型残余应力场数值模拟

前混合水射流喷丸强化表面力学特性及疲劳寿命试验

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机械工程学报 2011年第14期47卷 164-170页

作者：董星郭睿智段雄黑龙江科技学院机械工程学院哈尔滨150027 中国矿业大学机电工程学院徐州221008

为获得前混合水射流喷丸强化增益效果,研究前混合水射流喷丸对2A11铝合金和45钢的表面显微硬度、表面残余压应力和疲劳寿命的影响。采用显微硬度计和X射线应力分析仪分别测定喷丸表面显微硬度和表面残余应力,利用扫描电镜观察疲劳断口形... 详细信息

为获得前混合水射流喷丸强化增益效果,研究前混合水射流喷丸对2A11铝合金和45钢的表面显微硬度、表面残余压应力和疲劳寿命的影响。采用显微硬度计和X射线应力分析仪分别测定喷丸表面显微硬度和表面残余应力,利用扫描电镜观察疲劳断口形貌,获得喷丸表面显微硬度和表面残余压应力随喷丸压力、扫描速度及靶距的变化规律,指出射流喷丸可以大幅度地提高2A11铝合金和45钢的疲劳寿命,当2A11铝合金和45钢的应力振幅分别为155.7 MPa和282 MPa时,喷丸试样疲劳寿命比未喷丸试样疲劳寿命分别提高25.31倍和18.56倍,且未喷丸试样疲劳裂纹萌生于试样表面,喷丸试样疲劳裂纹有的萌生于试样表面,有的萌生于试样内部,当疲劳源在试样内部时,裂纹在夹杂物处萌生。因此,前混合水射流喷丸是一种提高金属零构件疲劳寿命的有效方法。

关键词：水射流喷丸疲劳寿命显微硬度残余压应力

The Numerical Simulation Research of Wear of the Impeller of the Main Ventilator in Mine Pit

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The Numerical Simulation Research of Wear of the Impeller of...

应用卷积神经网络分类的Hindeodus牙形刺细粒度数据集

2005国际机械工程与力学会议

作者： Xing DONG Hailu ZHANG xiong duan Institute of Mechanical Engineering Heilongjiang Institute of Science and Technology Institute of Mechanical & Electronical Engineering China University of Mining and Technology

Take the axis main ventilator 2K60 in mine pit for example, by applying the gas-solid dual phase flowing theory, the wear site and the wear process of the impeller are analyzed. The conclusion complies with the real field situation. On this basic before, base on the geometry non-linear theory and material non-linear theory, have the numerical simulation to the distortion wear process of the impeller of the main ventilator by software ANSYS/LS-DYNA. In simulation, contact-impact finite element numerical value calculation method adopts the dynamic contact symmetry penalty-function method;contact type chooses single contact arithmetic. The material constitutive model adopts Bilinear Isotropic hardening model. Get some information that there will be some impacting concaves on the surface of impeller by the impacting of mine dust granule with certain diameter and velocity, and there will be some accumulation due to plastic distortion at the edge of concaves, and there will also be the most biggest Von Mises stress at the place of accumulation, the most biggest Von Mises stress and the degree of distortion wear will augment as the increases of the diameter and impacting velocity of granule.

关键词： Safety in colliery Ventilation in mine pit Wear of the impeller Numerical simulation

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中国科学数据（中英文网络版） 2023年第2期8卷 315-328页

作者：段雄西华师范大学地理科学学院四川南充637009 西华师范大学四川省干旱河谷土壤侵蚀监测与控制工程实验室四川南充637009

随着人工智能浪潮的兴起,利用卷积神经网络对化石进行分类识别已得到越来越多的关注,并表现出了巨大的应用潜力。通过调研发现,前人所分类的化石物种基本属于不同的属、科或更高级的生物分类单位。然而,现实中对于同属异种化石的鉴定往... 详细信息

随着人工智能浪潮的兴起,利用卷积神经网络对化石进行分类识别已得到越来越多的关注,并表现出了巨大的应用潜力。通过调研发现,前人所分类的化石物种基本属于不同的属、科或更高级的生物分类单位。然而,现实中对于同属异种化石的鉴定往往是重点和难点,也意味着前人所训练的分类器可能并不能很好地用于实际的化石鉴定。鉴于此,本文通过文献收集,建立了一个包含12种同属于Hindeodus属的牙形刺数据集,同时提供了对原始数据增强后的数据集。由于该数据集具有细粒度的特点,用户可以使用卷积神经网络并结合细粒度图像特征提取技术对其进行训练。针对数据集存在数据量较少、类别不均衡等不足,建议用户在训练时使用分层K折交叉验证、迁移学习和加权损失函数等手段来解决以上问题。本文数据集旨在为生物化石智能识别领域增补一个细粒度化石数据集,其可作为卷积神经网络对细粒度(种一级)化石进行智能鉴定的实验数据集。本数据集所遵循的细粒度原亦可以作为建立其他门类化石数据集的参考。

关键词：卷积神经网络牙形刺 Hindeodus 细粒度

Research on Ultrafine WC-10Co Cemented Carbide with High Propertie

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Journal of Wuhan University of Technology(Materials Science) 2006年第4期21卷 154-157页

作者：史晓亮 State Key Laboratory of Advanced Technology for Materials Synthesis & Processing Wuhan University of Technology Wuhan 430070 China

WC- 10Co nanocomposite powder produced by spray pyrolysis-continuoas reduction and carbonization technology was used, and the vacuum sinteriag plus sinterhip process was cdopted to prepare ultrafine WCCo cemented carbide. The microstructure, grain size, porosity, density, Rockwell A hardness （ HRA ）, transverse rupture strength （ TRS ） , saturated magnetization and coercivity force were studied. The experimental results show that average grain size of the sample prepared by vacuum sintering plas sinterhip technology was about 420 nm, transverse rupture strength was more than 3460 MPa, and Rockwell A hardness of sintered specimen was more than 92.5. Ultrafine WC- 10Co cemented carbide with high strength and high hardness is obtained.

关键词： WC- Co nanocomposite powder cemented carbide vacuum sinteriag sinterhip