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Microstructure and tensile properties of magnesium nanocomposites fabricated using magnesium chips and carbon black

journal of Magnesium and Alloys 2020年第3期8卷 860-872页

作者： t.j.lee W.j.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

In this study,carbon black(0,0.01,0.03 and 0.08 wt%)and AZ31(Mg-3Al-lZn)magnesium chips were used to fabricate carbon black-reinforced magnesium matrix composites with extrusion or a combination of extrusion and high-ratio differential speed *** hot pressing at 693 K and extrusion at 623 K with an extrusion ratio of 22,the magnesium chips coated with carbon black were soundly bonded into a bulk composite *** grain sizes of the extruded materials were similar with a size of 48.2-51.5|im despite the difference in the amount of carbon *** yield strength and ultimate tensile strength increased from 177 to 191 MPa and from 240 to 265 MPa,respectively,as a result of the addition of 0.01%carbon black;however,a further increase in the strength was marginal with additional carbon *** same trend was observed in the strain hardening *** tensile elongation increased by to the addition of 0.01%carbon black(from 15.8%to 17.4%)due to the increased work hardening effect,but decreased with additional carbon black due to its agglomeration and poor dispersion at higher *** high-ratio differential speed rolling(HRDSR)on the extruded materials and subsequent annealing,the AZ31 and AZ31 composites had a similar fine grain size of 16.3-17.9 *** annealed HRDSR composites showed the best mechanical properties at a higher content of carbon black(0.03%)compared to that(0.01%)for the extruded *** resulted from the enhanced dispersion effect of the carbon black due to the high shear flow induced during the HRDSR *** extruded composites exhibited the three distinct hardening stages(stage II,stage III and stage IV),while the annealed HRDSR composites mainly displayed the stage III *** addition of carbon black increased the strain hardening rate at all the strain hardening stages in both of the extruded and annealed HRDSR *** the initial hardening stage,the strain hardening rates of the extruded comp

关键词： Recycling Magnesium alloys chips Carbon black Nanocomposites Extrusion Differential speed rolling

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Pazopanib in advanced soft tissue sarcomas

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Signal transduction and targeted therapy 2019年第1期4卷 538-547页

作者： Alex t.j.lee Robin L.jones Paul H.Huang Division of Molecular Pathology The Institute of Cancer ResearchLondonUK Sarcoma Unit The Royal Marsden NHS Foundation TrustLondonUK Division of Clinical Studies Institute of Cancer ResearchLondonUK

Pazopanib is the first and only tyrosine kinase inhibitor currently approved for the treatment of multiple histological subtypes of soft tissue sarcoma(StS).Initially developed as a small molecule inhibitor of vascular endothelial growth factor receptors,preclinical work indicates that pazopanib exerts an anticancer effect through the inhibition of both angiogenic and oncogenic signaling *** the establishment of optimal dosing and safety profiles in early phase studies and approval for the treatment of advanced renal cell carcinoma,pazopanib was investigated in StS.A landmark phase III randomized study demonstrated improved progression-free survival with pazopanib compared to that with placebo in pretreated patients with StS of various *** efficacy of pazopanib in specific StS subtypes has been further described in real-world-based case series in both mixed and subtype-specific StS *** present,there are no clinically validated predictive biomarkers for use in selecting patients with advanced StS for pazopanib therapy,limiting the clinical effectiveness and cost-effectiveness of the *** this review,we summarize the preclinical and clinical data for pazopanib,outline the evidence base for its effect in StS and explore reported studies that have investigated putative biomarkers.

关键词： sarcoma clinical approval

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侧支图：急性前循环缺血性脑卒中后病变进展和缺血半暗带的预测

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国际医学放射学杂志 2024年第3期 371-371页

作者： j.S.Yi H.j.Ki Y.S.jeon j.j.Park t.j.lee j.t.Kwak 黄世豪

摘要目的旨在评估侧支图预测急性前循环缺血性脑卒中后病变进展和缺血半暗带的能力。方法从前瞻性收集的数据库中选定数据进行回顾性分析。基于扩散加权成像

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搜索引擎的奥秘

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电子与电脑 1999年第8期 65-73页

作者： lee Hudspeth ,t.j.lee ,肖明

你难道不想不离开办公桌就能够窥探竞争对手的情况吗?你想只单击一下按钮就查看到女儿新近结交的男朋友的关键记录吗?或者你想学习一些专家技巧以便提高你的Web页面的知名度,使之在Web搜索引擎的检索结果中处于靠前的位置? 无论你的事... 详细信息

你难道不想不离开办公桌就能够窥探竞争对手的情况吗?你想只单击一下按钮就查看到女儿新近结交的男朋友的关键记录吗?或者你想学习一些专家技巧以便提高你的Web页面的知名度,使之在Web搜索引擎的检索结果中处于靠前的位置? 无论你的事业是否成功,都应该充分利用Web和搜索引擎。Web作为一种秘密武器,可以用来迅速获得关键商业问题的答案,对竞争对手的财务状况以及背景情况进行深入的调查,甚至还可以用来跟踪吉隆坡干酪的人均消费量是多少如果你掌握了我们提供的这份搜索

关键词：检索结果检索表达式网站页面

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免费资源大放送

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电子与电脑 1999年第9期6卷 67-76页

作者： lee Hudspeth t.j.lee 肖明

生活中最美好得东西莫过于免费或者几乎免费的东西,但前提是你得知道在什么地方能够找到它们,在此,我们将PCComputing发掘的最佳免费资源奉献给读者。

关键词：网络资源 Internet网 Web 免费资源

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彻底卸载应用程序

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电子与电脑 2000年第1期7卷 128-129页

作者： lee Hudspeth t.j.lee 肖明

很多时候,当你以为已经成功地卸载了某个程序时,却发现还有许多令人难解的错误消息、可疑的DLL文件以及其他零散的旧文件滞留在计算机系统中,卸载并没有成功。你当然可以忽略这些恼人的东西,但我们已经找到了一个好办法,本文告诉你如何... 详细信息

很多时候,当你以为已经成功地卸载了某个程序时,却发现还有许多令人难解的错误消息、可疑的DLL文件以及其他零散的旧文件滞留在计算机系统中,卸载并没有成功。你当然可以忽略这些恼人的东西,但我们已经找到了一个好办法,本文告诉你如何一劳永逸地清除这些被卸载的软件留下的杂乱垃圾。

关键词： Windows 应用程序 DLL文件注册表计算机

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Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.t.jeong S.W.lee W.j.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

the superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

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In situ characterization of particle formation in spray flame synthesis using wide-angle light scattering

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Particuology 2024年第3期86卷 304-312页

作者： Simon Aβmann Franz j.t.Huber Stefan Will Lehrstuhl für technische thermodynamik(Ltt) Friedrich-Alexander-Universitat Erlangen-Nürnberg(FAU)Erlangen91058Germany Erlangen Graduate Schoolin Advanced Optical technologies(SAOt) Friedrich-Alexander-Universitat Erlangen-Nurnberg(FAU)Erlangen91052Germany Competence Unit Engineering of Advanced Materials(EAM) Friedrich-Alexander-Universitat Erlangen-Nürnberg(FAU)Erlangen91052Germany

Wide-angle light scattering(WALS)was used for in situ measurements of droplet and nanoparticle size distributions during the synthesis of titania and iron oxide particles from liquid precursor solutions in the standardized SpraySyn burner for spray flame *** was synthesized from titanium tetraisopropoxide(ttIP)and iron oxide from iron(II)nitrate nonahydrate(INN)using ethanol(EtOH)as *** images were taken at heights up to 120 mm above the burner surface and classified into droplet and particle *** size distributions were derived from a sequential analysis of scattering data containing the oscillating Mie pattern,the lognormal size distribution parameters for spherical and fractal particle fractions from a multivariate approach on averaged particle scattering *** results show that the precursor addition leads to altered evaporation behavior and even droplet disruption probably induced by puffing or micro-explosions compared to pure *** the case of ttIP(a hygroscopic alkoxide),the synthesis of a large fraction of spheres was observed,while the nitrate INN leads to the formation of mostly fractal aggregates.

关键词： Spray flame synthesis Metal oxide particles Elastic light scattering Droplet size distribution Nanoparticle morphology Particle size distribution

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快速组织程序

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电子与电脑 1999年第12期6卷 120-120页

作者： lee Hudspeth t.j.lee 肖明

Microsoft Outlook是一种用来记录约会、电子函件和便笺的极佳途径。Outlook中鲜为人知的AutoCreate特性可以使一切变得更加轻松。有了AutoCreate,你只需拖放条目就可以生成各种类型的新记录:约会、联系人、日记、消息、便笺及任务。例... 详细信息

Microsoft Outlook是一种用来记录约会、电子函件和便笺的极佳途径。Outlook中鲜为人知的AutoCreate特性可以使一切变得更加轻松。有了AutoCreate,你只需拖放条目就可以生成各种类型的新记录:约会、联系人、日记、消息、便笺及任务。例如,利用它可以即时将各种便笺转换成电子邮件或者任务列表。

关键词： Outlook 电子邮件任务列表

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Reply to the note by Li Piani et al.

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Defence technology（防务技术） 2024年第1期31卷 603-606页

作者： t.Li Piani j.Weerheijm L.j.Sluys tU Delft Stevinweg 12628 CNDelftthe Netherlands tNO PO Box 452280 AARijswijkthe Netherlands NLDA Faculty of Military Sciences1781 CADen Helderthe Netherlands

In 2017,a ballistic phenomenological model was proposed by the authors of Ref.[1] to numerically simulate the experimental depths of small caliber projectiles impacting walls made of *** opportunity for a new model in the field revealed from the observation that two older models recently used by the authors of Ref.[2] shared a linear relationship between the penetration depth P and the impacting velocity v_(O).

关键词： Penetration Adobe Modeling

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