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3D打印在冠状动脉梗阻风险患者经导管主动脉瓣置换术前评估中的应用2例

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中国介入心脏病学杂志 2024年第2期32卷 116-120页

作者：戴佳祁王首正朱达潘湘斌云南省阜外心血管病医院结构性心脏病中心云南昆明650102 国家心血管病中心北京协和医学院中国医学科学院阜外医院结构性心脏病中心北京100037

经导管主动脉瓣置换术(TAVR)是目前治疗主动脉瓣疾病的主要策略之一,术前影像学评估对TAVR手术方案的制定和并发症发生风险的预防具有重要意义。不同于平面影像图像重建技术,3D打印技术的应用,可以精准呈现主动脉根部解剖结构,并通过体... 详细信息

经导管主动脉瓣置换术(TAVR)是目前治疗主动脉瓣疾病的主要策略之一,术前影像学评估对TAVR手术方案的制定和并发症发生风险的预防具有重要意义。不同于平面影像图像重建技术,3D打印技术的应用,可以精准呈现主动脉根部解剖结构,并通过体外模拟进一步评估TAVR手术风险及治疗策略,尤其是对于冠状动脉梗阻风险的评估及干预策略的制定。本文报道2例术前经3D打印主动脉根部解剖仿真模型并结合体外球囊扩张/瓣膜置入测试,评估及应对CT血管造影平面影像重建提示冠状动脉梗阻风险的TAVR患者。

关键词：经导管主动脉瓣置换术主动脉瓣狭窄冠状动脉梗阻 3D打印技术

The mini-QSO's contribution to cosmic reionization

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Research in Astronomy and Astrophysics 2010年第3期10卷 199-210页

作者： Ying-Ying wang Lei wang shou-Ping xiang Yu wang Jing-Meng Hao Ye-Fei Yuan Center for Astrophysics University of Science and Technology of China Hefei 230026 China Shanghai Astronomical Observatory Joint Institute for Galaxy and Cosmology （JOINGC） of SHAO and USTC Shanghai 200030 China

By employing an improved simulation of the evolution of black holes （BHs） based on the merger tree of dark matter halos, we explore the relationship between the central BH mass Mbh and velocity dispersion σ＊ at high redshift z ≥ 6 and quantify the mini-QSO＇s （with BH mass M = 200 - 105M⊙） contribution to cosmic reionization. The simulation demonstrates how seed BHs migrate onto the MBH-σ＊ relation by merging with each other and accreting gas at z ≥ 6： 1. The correlation between BHs and their host halos increases as the BHs grow; 2. The slope, i.e. Ф = dlog（Mbh）/dlog（σ＊） in the relationship, is insensitive to the redshift at z 〉 6. In agreement with previous work, we find that mini-QSOs＇ ionizing capability to the Universe lies in the range - 25% - 50% if early miniquasars have extremely high duty cycles, i.e. P（z 〉 6） - 0.9 - 1.

关键词： cosmology: theory -- galaxies: evolution

Surface modification of wollastonite by the mechano-activated method and its properties

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International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 83-88页

作者： Hao Ding shou-ci Lu Gao-xiang Du School of Materials Science and Technology China University of Geosciences Beijing 100083 China School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China

Surface modification of wollastonite particles using titanate as a modification agent incorporated by simultaneous wet ultra-fine grinding in a laboratory stirred mill was *** physical,physic-chemical and application properties of the modified wollastonite were measured and *** results showed that grinding intensity markedly influences the modification effect because of the mechano chemical *** hydrophilic surface of wollastonite was turned into a hydrophobic one after *** interaction between titanate and wollastonite under wet grinding circumstances was *** was suggested that physical adsorption and chemical adsorption of titanate coexisted on the wollastonite *** mechanical properties of polyethylene（PE） filled with the modified wollastonite powder were markedly improved.

关键词： silicate minerals modification surface properties ball milling fillers

Palynoflora and climatic dynamics of the Laizhou Bay of Bohai Sea,North China Plain,since the late middle Pleistocene

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Journal of Palaeogeography 2023年第2期12卷 278-295页

作者： Wen-Xia wang Xiu-Li Zhao shou-Jun Li Lei Zhang Xiao-Li wang xiang-Yu Zhang College of Life Sciences Linyi UniversityLinyi 276000Shandong ProvinceChina College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina State Key Laboratory of Palaeontology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina

The coastal plain of Laizhou Bay in Bohai Sea is a transitional area of land-sea *** in this area can bear significant information of sea-level fluctuation,climate change,as well as regional geological ***,in this study,new sporopollen data from three boreholes(GK138,GK111 and GK95)in the coastal plain of Laizhou Bay,Bohai Sea were investigated,and the pollen spectrum since the late middle Pleistocene was established as six sporopollen assemblage zones(Ⅰ-Ⅵ),i.e.,Pinus-Quercus-Artemisia,Gramineae-Artemisia-Chenopodiaceae,Picea-Pinus-QuercusArtemisia,Picea-Pinus-Betula-Gramineae-Artemisia,Picea-Pinus-Cupressaceae-Chenopodiaceae and *** with existing sedimentary successions and detailed radiocarbon dating results of the sediments from the three boreholes,paleovegetation and climatic evolution since the late middle Pleistocene were *** findings revealed that climatic changes in this area since the late middle Pleistocene were characterized by alternating cold-arid and warmhumid conditions,which were well correlated with marine isotopic stages(MIS).The present study offers specific insight into the climatic dynamics in the North China Plain since the late middle Pleistocene and provides evidence of a clear link among the palynoflora in the area,the glacial-interglacial period climatedriven sea-level changes,and the marineδ^(18)O records.

关键词： Laizhou Bay Late middle Pleistocene Pollen spectrum Palynoflora Climatic dynamics North China Plain

Alloying behavior and characterization of(CoCrFeNiMn)_(90)M_(10)(M=Al,Hf)high-entropy materials fabricated by mechanical alloying

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2253-2265页

作者： Nai-ran wang shou-ren wang Xiao-xiang GOU Ze-cheng SHI Jian-xiang LIN Guo-qiang LIU Yan wang School of Materials Science and Engineering University of JinanJinan 250022China School of Mechanical Engineering University of JinanJinan 250022China

The alloying behavior and microstructures of the(CoCrFeNiMn)_(90)M_(10)(M=Al,Hf)high-entropy alloy(HEA)powders fabricated by mechanical alloying were *** CoCrFeNiMn)_(90)Al_(10) powders have duplex solid-solution *** contrast,nanocrystalline HfNi_(3) anchoring in amorphous structures is found in the(CoCrFeNiMn)_(90)Hf_(10) ***(CoCrFeNiMn)_(90)Al_(10) powders show better ferromagnetic behaviors,mainly explained by the facilitated motion of the magnetic domain induced by the coherent interface between duplex *** with our previous work,the rules of forming solid-solution and amorphous phase in as-milled HEA powders are preliminarily *** is found that,compared with the as-cast HEA reported previously,the variation range of mixing enthalpy with atomic size difference of the solid-solution formed in as-milled HEA powders is ***,the variation ranges between mixing enthalpy and entropy with atomic size difference of the amorphous phase in HEA powder become wider than those of high-entropy bulk metallic glass.

关键词： high-entropy powder mechanical alloying ferromagnetic properties alloy design phase stability

Surface modification of polyester film by glow discharge tunnel at atmospheric pressure

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中国有色金属学会会刊：英文版 2004年第z1期14卷 459-462页

作者： XU xiang-yu wang shou-guo YE Tian-chun JING Guang-yin YU Da-peng State Key Laboratory for Mesoscopic Physics School of Physics Beijing 100871 China The Institution of Microelectronics Chinese Academy of Sciences Beijing 100010 China The Institution of Microelectronics Chinese Academy of Sciences Beijing 100010 China The Institution of Microelectronics Chinese Academy of Sciences Beijing 100010 China State Key Laboratory for Mesoscopic Physics School of Physics Beijing 100871 China State Key Laboratory for Mesoscopic Physics School of Physics Beijing 100871 China

A large-area improved dielectric barrier glow discharge tunnel has been developed for modifying the surface of polyester film at atmospheric pressure with argon and oxygen gas mixtures. The electrical properties of the glow discharge tunnel were studied by simultaneous measurement of the voltage and current. In addition, the effect of the glow discharge tunnel treatment on the surface of polyester film were studied. The resultant modifications of the surface properties of the treated samples were investigated through scanning probe microscopy and contact angle measurement.

关键词： glow discharge tunnel electrical characteristics surface modification polyester film

Symmetric and Asymmetric Rolling Pure Copper Foil: Crystal Plasticity Finite Element Simulation and Experiments

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Acta Metallurgica Sinica(English Letters) 2015年第8期28卷 1024-1033页

作者： shou-Dong Chen xiang-Hua Liu Li-Zhong Liu State Key Laboratory of Rolling and Automation Northeastern University School of Materials and Metallurgy Northeastern University

A systematic study has been conducted aiming to attain an insight into the influence of coefficient of roll speed asymmetry, crystal orientation and structure on the deformation behavior, and crystallographic orientation development during foil rolling. Simulations were successfully carried out by using crystal plasticity finite element method（CPFEM）,and a novel computational framework is presented for the representation of virtual polycrystalline grain structures. It has been found that asymmetric rolling（ASR） is more efficient in producing plastic deformation since it develops additional shear strain and activity of slip system compared with symmetric rolling（SR）. For ASR, increase in the length of the shear zone, and decrease in the amount of the pressure and roll force would lead to further reduction. The shear strain path in SR and ASR is strictly influenced by the misorientation of neighbor grains, and corresponding {1 1 1} pole figures offer direct evidence of the spread of crystallographic orientation around the normal direction. The activity of slip systems was examined in detail and found that the predicted results are consistent with the surface layer model. The accuracy of the developed CPFEM model is verified by the fact that the simulated results of roll force coincide well with the experimental results.

关键词： Foil rolling Shear deformation Polycrystals model Finite element analysis

Ascorbic Acid Assisted Green Route for Synthesis of Water Dispersible Carbon Dots

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Chemical Research in Chinese Universities 2013年第3期29卷 401-403页

作者： NAWAZ Faisal wang Liang ZHU Long-feng MENG xiang-ju XIAO Feng-shou State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changehun 130012 P. R. China Department of Chemistry Zhejiang University Hangzhou 310028 P. R. China

Conventional quantum dots inherently carry the risk of cytotoxicity. Considering the biomedical limitations, an amino acid and vitamin were utilized to prepare highly luminescent carbon dots. Ascorbic acid and lysine were used to synthesize water soluble carbon dots which are highly hiocompatible as both reactants and essential nutrients.

关键词： Carbon dot Ascorbic acid Hydrothermal synthesis Lysine Green synthesis Water dispersible

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抗枯萎病宝岛蕉早花突变体的筛选与鉴定

南方农业学报 2024年第2期55卷 540-550页

作者：赵明龙芳武鹏莫天利黄相苏祖祥魏守兴邹瑜张欣林志城广西农业科学院生物技术研究所广西南宁530007 中国热带农业科学院热带作物品种资源研究所海南海口571101 中国热带农业科学院环境与植物保护研究所海南海口571101 广西植物组培苗有限公司广西南宁530007

【目的】筛选鉴定抗枯萎病香蕉品种宝岛蕉的早花突变体,为进一步利用突变体株系选育适应性更广的香蕉新品种提供参考依据。【方法】利用多代组织培养繁育结合田间种植对比试验,依据生育期短、抗病性强、株高矮、株产高和遗传稳定筛选目... 详细信息

【目的】筛选鉴定抗枯萎病香蕉品种宝岛蕉的早花突变体,为进一步利用突变体株系选育适应性更广的香蕉新品种提供参考依据。【方法】利用多代组织培养繁育结合田间种植对比试验,依据生育期短、抗病性强、株高矮、株产高和遗传稳定筛选目标,从宝岛蕉早花突变后代中筛选优良株系,以宝岛蕉为对照,按照香蕉种质资源描述规范对优良突变株系的形态特征和生物学特性等进行观察鉴定,测定分析植株球茎生长点部位碳、氮营养累积以及成花相关激素吲哚乙酸(IAA)、玉米素(ZR)、赤霉素(GA)和脱落酸(ABA)含量差异,通过ISSR分子标记检测突变体及其野生型之间的遗传变异和亲缘关系。以宝岛蕉和主栽品种(桂蕉6号及巴西蕉)为对照,利用伤根浸菌法进行苗期抗病性鉴定,并在广西和海南开展区域种植试验及田间抗病性鉴定。【结果】筛选获得优良突变株系0523(简称0523),其新植蕉平均株高280.0 cm,假茎基围80.5 cm、中围60.0 cm,较宝岛蕉分别减小14.0%、5.8%和11.8%,新抽总叶片数26~29片;果实营养品质和单株产量与宝岛蕉无显著差异(P>0.05,下同)。0523球茎生长点碳氮比较宝岛蕉显著提高19.0%(P<0.05,下同),GA和IAA含量显著降低24.8%和22.6%,ABA和ZR含量与宝岛蕉相比略有增加,差异不显著。抗病性苗期鉴定结果显示0523为中抗且偏强,抗性水平与宝岛蕉相比略有提高,桂蕉6号为高感。突变株系0523与宝岛蕉的多态性比率为8.8%,遗传相似系数为0.95,二者存在差异。0523在广西和海南各试验点第1、2造蕉平均发病率分别为4.5%和3.5%,较主栽品种降低87.8%和94.1%,各试验点发病率均显著低于主栽品种。0523第1、2造蕉的生育期较宝岛蕉显著缩短,与主栽品种无显著差异。【结论】突变株系0523具有抗枯萎病、早熟、矮化、适应性广等优良性状,可用来培育大面积推广的香蕉新品种,或作为亲本育种材料应用于香蕉育种研究。

关键词：早花突变体抗枯萎病选育香蕉