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Low-thermal-conductivity thermal barrier coatings with a multi-scale pore design and sintering resistance following thermal exposure

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Rare Metals 2020年第4期39卷 352-367页

作者： wei-wei Zhang zhi-yuan wei Li-yuan Zhang Ya-Zhe Xing Qiang Zhang School of Materials Science and Engineering Chang'an UniversityXi'an 710064China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi'an 710049China College of Chemistry and Chemical Engineering Neijiang Normal UniversityNeijiang 641112China AECC Beijing Institute of Aeronautical Material Beijing 100095China

High-insulation,long-life thermal barrier coatings(TBCs)decrease the service temperature of superalloys and improve the service life of gas *** in the thermal insulation properties of the coating mainly depends on the optimization of the TBC *** important challenge for TBCs is maintaining a high performance during thermal exposure without degradation,as the pore-rich structure of the topcoat would inevitably be transformed by sintering.A low-thermalconductivity anti-sintering coating can overcome the tradeoff between thermal insulation and sinter *** this review,the design,preparation,and serviceability evaluation of a low-thermal-conductivity anti-sintering coating will be ***,directions for potential development are *** paper provides a comprehensive understanding of the structured tailoring of TBCs for better thermal insulation and anti-sintering performance.

关键词： Thermal barrier coatings Multi-scale pore Sintering resistance Low thermal conductivity

Towards the insights into the deactivation behavior of acetylene hydrogenation catalyst

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Petroleum Science 2024年第2期21卷 1405-1414页

作者： Hai-Xia Su Yang Jiao Jian-Gong Shi zhi-wei yuan Di Zhang Xu-Peng Wang Jing Ren Dan Liu Jian-Zhou Gui Hai-Yang Gao Xiao-Li Xu State Key Laboratory of Separation Membranes&Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringSchool of Material Science and EngineeringTiangong UniversityTianjin300387China Institute of Engineering Technology Sinopec Catalyst Co.LtdBeijing101100China State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process EngineeringSchool of ChemistryTiangong UniversityTianjin300387China

A series of model catalysts were obtained by treating commercial fresh and spent catalysts unloaded from the factory with different methods, including green oil dipping, extraction and high-temperature regeneration;finally, the deactivation behavior of the commercial catalyst for acetylene hydrogenation were studied. The influence of various possible deactivation factors on the catalytic performance was elucidated via detailed structural characterization, surface composition analysis, and activity *** results showed that green oil, carbon deposit and sintering of active metal were the main reasons for deactivation, among which green oil and carbon deposit led to rapid deactivation, while the activity could be recovered after regeneration by high-temperature calcination. The sintering of active metal components was attributed to the high-temperature regeneration in hydrothermal conditions, which was slow but irreversible and accounted for permanent deactivation. Thus, optimizing the regeneration is expected to extend the service life of the commercial catalyst.

关键词： Acetylene Hydrogenation Green oil Carbon deposit Sintering Catalyst deactivation

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三维空间纯方位多目标跟踪PHD算法

电子学报 2018年第6期46卷 1371-1377页

作者：熊志刚黄树彩苑智玮赵炜空军工程大学防空反导学院陕西西安710051

针对基于概率假设密度算法(Probability Hypothesis Density,PHD)的高维纯方位多目标跟踪,提出了新型的PHD算法—新型采样准则的基于无迹变换的粒子PHD算法(Unscented Particle PHD based on New Sampling Rule,NSRUP-PHD).新算法对每个目标设计了基于无迹变换(Unscented Transform,UT)的粒子滤波器,不仅解决了非线性滤波估计的问题,而且还通过高斯混合的方式实现了非高斯噪声估计.此外粒子滤波器提出了一种新型的采样手段,通过基于三阶容积准则(Cubature Rule,CR)的粒子方位选择和概率累加的距离延伸,使得采样粒子遍布整个空间的同时保障了粒子概率分布的问题,提高了粒子使用的效率.仿真结果表明NSRUP-PHD能够实现多目标有效跟踪,相比于传统的算法和伪随机采样,新型滤波器和采样手段可改善跟踪效果.

关键词：多目标跟踪概率假设密度无迹变换三阶容积准则

Characterization of Changes and Driver Microbes in Gut Microbiota During Healthy Aging Using A Captive Monkey Model

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Genomics, Proteomics & Bioinformatics 2022年第2期20卷 350-365页

作者： zhi-yuan wei Jun-Hua Rao Ming-Tian Tang Guo-An Zhao Qi-Chun Li Li-Ming Wu Shao-Qiang Liu Bi-Hai Li Bai-Quan Xiao Xing-Yin Liu Jian-Huan Chen Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou 510260China Laboratory of Genomic and Precision Medicine Wuxi School of MedicineJiangnan UniversityWuxi 214122China Joint Primate Research Center for Chronic Diseases Jiangnan University and Institute of ZoologyGuangdong Academy of SciencesWuxi School of MedicineJiangnan UniversityWuxi 214122China Department of Pathogen-Microbiology Division Nanjing Medical UniversityNanjing 211166China

Recent population studies have significantly advanced our understanding of how age shapes the gut ***,the actual role of age could be inevitably confounded due to the complex and variable environmental factors in human populations.A well-controlled environment is thus necessary to reduce undesirable confounding effects,and recapitulate age-dependent changes in the gut microbiota of healthy *** we performed 16S rRNA gene sequencing,characterized the age-associated gut microbial profiles from infant to elderly crab-eating macaques reared in captivity,and systemically revealed the lifelong dynamic changes of the primate gut *** the most significant age-associated taxa were mainly found as commensals such as Faecalibacterium,the abundance of a group of suspicious pathogens such as Helicobacter was exclusively increased in infants,underlining their potential role in host ***,topology analysis indicated that the network connectivity of gut microbiota was even more agedependent than taxonomic diversity,and its tremendous decline with age could probably be linked to healthy ***,we identified key driver microbes responsible for such age-dependent network changes,which were further linked to altered metabolic functions of lipids,carbohydrates,and amino acids,as well as phenotypes in the microbial *** current study thus demonstrates the lifelong age-dependent changes and their driver microbes in the primate gut microbiota,and provides new insights into their roles in the development and healthy aging of their hosts.

关键词： Age-dependent change Non-human primate Healthy gut microbiota Network connectivity Driver microbe

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

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Journal of Advanced Ceramics 2022年第7期11卷 985-1068页

作者： zhi-yuan wei Guo-Hui MENG Lin CHEN Guang-Rong LI Mei-Jun LIU wei-Xu ZHANG Li-Na ZHAO Qiang ZHANG Xiao-Dong ZHANG Chun-Lei WAN zhi-Xue QU Lin CHEN Jing FENG Ling LIU Hui DONG Ze-Bin BAO Xiao-Feng ZHAO Xiao-Feng ZHANG Lei GUO Liang WANG Bo CHENG wei-wei ZHANG Peng-Yun XU Guan-Jun YANG Hong-Neng CAI Hong CUI You WANG Fu-Xing YE Zhuang MA wei PAN Min LIU Ke-Song ZHOU Chang-Jiu LI State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Strength and Vibration of Mechanical Structures Department of Engineering MechanicsSchool of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China Xi’an Aerospace Composite Research Institute Xi’an 710025China AECC Beijing Institute of Aeronautical Materials Beijing 100095China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of New Ceramics&Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Xi’an Key Laboratory of High Performance Oil and Gas Field Materials School of Materials Science and EngineeringXi’an Shiyou UniversityXi’an 710065China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China National Engineering Laboratory for Modern Materials Surface Engineering Technology the Key Lab of Guangdong for Modern Surface Engineering TechnologyInstitute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Integrated Computational Materials Research Centre Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China State Key Laboratory of Advanced Processing and Recycling of

Thermal barrier coatings(TBCs)can effectively protect the alloy substrate of hot components in aeroengines or land-based gas turbines by the thermal insulation and corrosion/erosion resistance of the ceramic top ***,the continuous pursuit of a higher operating temperature leads to degradation,delamination,and premature failure of the top *** new ceramic materials and new coating structures must be developed to meet the demand for future advanced TBC *** this paper,the latest progress of some new ceramic materials is first ***,a comprehensive spalling mechanism of the ceramic top coat is summarized to understand the dependence of lifetime on various factors such as oxidation scale growth,ceramic sintering,erosion,and calcium–magnesium–aluminium–silicate(CMAS)molten salt ***,new structural design methods for high-performance TBCs are discussed from the perspectives of lamellar,columnar,and nanostructure *** latest developments of ceramic top coat will be presented in terms of material selection,structural design,and failure mechanism,and the comprehensive guidance will be provided for the development of next-generation advanced TBCs with higher temperature resistance,better thermal insulation,and longer lifetime.

关键词： thermal barrier coatings(TBCs) ceramic material degradation and failure structure design long lifetime

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模式分类中的特征融合方法

北京邮电大学学报 2017年第4期40卷 1-8页

作者：刘渭滨邹智元邢薇薇北京交通大学信息科学研究所北京100044 北京交通大学软件学院北京100044

特征融合方法是模式识别领域的一种重要方法.计算机视觉领域的图像识别问题作为一种特殊的模式分类问题,仍然存在很多挑战.特征融合方法能够综合利用多种图像特征,实现多特征的优势互补,获得更加鲁棒和准确的识别结果.笔者基于信息融合... 详细信息

特征融合方法是模式识别领域的一种重要方法.计算机视觉领域的图像识别问题作为一种特殊的模式分类问题,仍然存在很多挑战.特征融合方法能够综合利用多种图像特征,实现多特征的优势互补,获得更加鲁棒和准确的识别结果.笔者基于信息融合理论分析了特征融合方法的原理,介绍了特征融合方法的研究现状,讨论了特征融合与3类主流基础理论相结合的方法,其中基于贝叶斯理论的特征融合算法可以实现多特征的融合决策,基于稀疏表示理论的特征融合算法能够得到多特征的联合稀疏表示,基于深度学习理论的特征融合算法能够强化深度神经网络模型的特征学习过程.

关键词：特征融合模式识别分类

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辽朝鲜演的华严思想

湖南大学学报（社会科学版） 2013年第5期27卷 40-45页

作者：袁志伟西北大学中国思想文化研究所陕西西安710069

鲜演华严思想的主要内容为:一是继承了唐代华严学的"真心"与"法界"等核心理念,二是吸收改造了天台宗的"止观"、"性恶"及唯识宗的"性相合一"思想,三是批判与融会了禅宗的"顿悟"与"一心"思想。鲜演的华严思想继承并发展了唐代华严思想的... 详细信息

鲜演华严思想的主要内容为:一是继承了唐代华严学的"真心"与"法界"等核心理念,二是吸收改造了天台宗的"止观"、"性恶"及唯识宗的"性相合一"思想,三是批判与融会了禅宗的"顿悟"与"一心"思想。鲜演的华严思想继承并发展了唐代华严思想的内在理路及基本精神,反映了唐代华严学在辽代的传承与复兴。

关键词：辽代佛教华严学鲜演心性论

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10—14世纪丝绸之路上的佛教思想与汉文化认同——以高昌回鹘佛教文献为中心的考察

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西北大学学报（哲学社会科学版） 2023年第2期53卷 111-118页

作者：袁志伟西北大学哲学学院陕西西安710127

10—14世纪高昌回鹘国的佛教思想以中原大乘佛教思想文化为主体,体现在对心性论思想的重视、对净土信仰的推崇、“三教合一”和佛教世俗化、简易化思潮的流行等方面。高昌回鹘的佛教文化在整体上是宋元中国佛教文化及汉文化的重要组成部... 详细信息

10—14世纪高昌回鹘国的佛教思想以中原大乘佛教思想文化为主体,体现在对心性论思想的重视、对净土信仰的推崇、“三教合一”和佛教世俗化、简易化思潮的流行等方面。高昌回鹘的佛教文化在整体上是宋元中国佛教文化及汉文化的重要组成部分,高昌回鹘对中原佛教文化的认同极大推进了其与中原地区的民族和文化认同,以及多元一体中华文化的进一步发展。同时,高昌回鹘佛教思想及其文化认同也是10—14世纪丝绸之路佛教文化的重要特征。

关键词：高昌回鹘佛教思想汉文化认同中原大乘佛教

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西夏人的佛儒融合思想及其伦理道德观

西北大学学报（哲学社会科学版） 2015年第4期45卷 87-92页

作者：袁志伟西北大学哲学与社会学学院陕西西安710069

党项民族和西夏人受到唐宋中原"三教合一"思潮的重要影响,形成了以佛儒融合为特点的道德伦理观,并在继承和综合中原佛教和儒家文化的基础上体现出自身的文化个性。这种伦理道德观既是党项民族学习中原汉文化并融合创新的成果,也是党项... 详细信息

党项民族和西夏人受到唐宋中原"三教合一"思潮的重要影响,形成了以佛儒融合为特点的道德伦理观,并在继承和综合中原佛教和儒家文化的基础上体现出自身的文化个性。这种伦理道德观既是党项民族学习中原汉文化并融合创新的成果,也是党项文化与汉民族文化交融和认同的重要表现。

关键词：佛教儒学党项道德观文化认同