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TiAl基合金中γ/γ界面关系的定量分析

材料工程 2004年第5期32卷 3-6,11页

作者：陈善华 g.舒马赫成都理工大学材料与生物工程学院成都610059 hahn-Meitner研究院固体结构与动力学所柏林14109

γ/γ界面对于(γ+α2)双相TiAl基合金的力学性能具有重要影响。本工作利用汇聚束电子衍射技术对一种含有Mn,Nb合金元素的(γ+α2)TiAl基合金中具有六种不同晶体学取向的γ相及γ/γ界面关系进行了实验唯一测定。结果表明,仅利用一套〈... 详细信息

γ/γ界面对于(γ+α2)双相TiAl基合金的力学性能具有重要影响。本工作利用汇聚束电子衍射技术对一种含有Mn,Nb合金元素的(γ+α2)TiAl基合金中具有六种不同晶体学取向的γ相及γ/γ界面关系进行了实验唯一测定。结果表明,仅利用一套〈334〉高阶劳厄带花样就可以完全决定该合金中γ层片的晶体学取向。该合金中γ/γ界面有四种,即绕〈111〉旋转120°、旋转180°呈镜面对称真孪晶、旋转60°呈镜面对称的伪孪晶和反相畴界面。统计分析表明,真孪晶γ/γ界面的比例最高,伪孪晶γ/γ界面和旋转120°γ/γ界面较少。TiAl合金中偶尔也会出现γ/γ反相畴界。

关键词： γ-TiAl基合金汇聚束电子衍射 γ/γ界面

g.avitational Forces Explained as the Result of Anisotropic Energ. Exchang. between Baryonic Matter and Quantum Vacuum

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Journal of Modern Physics 2015年第8期6卷 1135-1148页

作者： Stefan L. hahn Institute of Radioelectronics Warsaw University of Technology Warsaw Poland

g.avitational forces are explained as a result of energ. exchang. between baryonic matter having.the property of mass and the Quantum Vacuum. The derivations are starting.with a hypothesis that baryonic matter, particles, atoms and molecules exchang. energ. with the Quantum Vacuum with zero balance. It is assumed that in absence of an external g.avitation field the emission pattern is isotropic. There is no recoil force of radiation. The application of an external g.avitation field induces an anisotropy which results in a recoil force of radiation. An ellipsoidal radiation pattern is applied. The eccentricity of the ellipsoid is defined using.the maximum possible value of any g.avitation field estimated to have the value about 5 × 1012 [m/s2]. A formula is derived for calculating.the power of the isotropic radiation. It was shown that two masses attract due to the fact that g.avitation field lowers the energ. density of the Quantum Vacuum. Using.the results of measurements of a binary neutron star by Taylor and Hulse (Nobel Prize in Physics 1993) it was shown that possibly g.avitational waves carry neg.tive energ..

关键词： g.avitation Quantum Vacuum Neg.tive Energ. Recoil Forces

Microstructure and mag.etic properties evolution of Al/CoCrFeNi nanocrystalline hig.-entropy alloy composite

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Rare Metals 2022年第6期41卷 2038-2046页

作者： Jun-Jie Wang.Zong.De Kou Shu Fu Shang.Shu Wu Si-Nan Liu Meng.Yang.Yan Di Wang.Si Lan Horst hahn Tao Feng School of Material Science and Eng.neering Herbert Gleiter Institute of NanoscienceNanjing Universily of Science and TechnologyNanjing 210094China Institute of Nanotechnolog. Karlsruhe Institule of TechnologyKarlsruhe 76021Germany

A systematic microstructure-oriented mag.etic property investig.tion for Al/CoCrFeNi nanocrystalline hig.-entropy alloys composite(nc-HEAC)is *** the initial state,the Al/CoCrFeNi nc-HEAC is composed of face-centered cubic(FCC)-Al,FCC-CoCrFeNi and hexag.nal close-packed(HCP)-CoNi *** energ. synchrotron radiation X-ray diffraction and hig.-resolution transmission electron microscopy were used to reveal the relationship between microstructure evolution and mag.netic mechanism of Al/CoCrFeNi nc-HEAC during.heat *** low-temperature annealing.stag.,the mag.netic properties are mainly contributed by the HCP-CoNi *** the increase of temperature,the diffusion-in-duced phase transition process including.the transformation of AlCoCrFeNi HEA from FCC to BCC structure and the g.owth of B2 phase plays a dominant role in the mag.etic *** was found that the mag.etic properties can be effectively reg.lated throug. the control of the thermal diffusion *** nano dual-phase thermal diffusion-induced phase transition behavior of nanocomposites pre-pared based on laser-Ig. technolog. provides g.idance for the diffusion process and microstructure evolution of two phases in composites.

关键词： Nanocry salline hig.-entropy alloy composites Diffusion-induced phase transition Mag.etic Laser-inert g.s condensation

Metal Complexes:Novel Chiral Dopants with Hig. Helical Twisting.Power in Liquid Crystals

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复旦学报（自然科学版） 2007年第5期46卷 724-725页

作者： Manfred Braun R.Fleischer A.hahn M.Eng.lmann S.Schlecht Institute of Org.nic and Macromolecular Chemistry University of DuesseldorfD-40225 DuesseldorfGermany

1 Introduction A particularly efficient and eleg.nt route to chiral mesophases is based on the addition of small amounts of an enantiomerically pure dopant to a nematic phase so that the latter is converted into a cholesteric phase(See Fig.1).Fig.1 A nematic phase is converted into a cholesteric phase Fig.2 Bis-chelated imine-alkoxy-titanium complexes2 ExperimetalBis-chelated imine-alkoxy-titanium complexes like 1 and 2 (Fig.2) have been synthesizedstarting.from triphenyl-substituted aminoethanols, T...

关键词： metal complexes novel chiral dopants lig.id crystals

Road g.ometry Recovery Using.On-board Camera in Various Conditions

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Journal of Measurement Science and Instrumentation 2011年第2期2卷 120-123页

作者： Hern-soo hahn ITRC Research Center Soongsil UniversitySeoul 157-743Korea

A 3D road g.ometry reconstruction system using.on-board camera for vehicle driver assistance is developed. g.ven calibration of the camera, 3D structure of the road in front of the vehicle is built via multiple vanishing.points estimation and local parallelism of the road. The road will be modeled as a piecewise linear approximation of space curve. Vanishing.points are estimated throug. line g.ouping.and histog.am method in the imag.. The system is not restricted to the roads which lie on 2D plane, but also is capable of recovering.a full 3D g.ometry. The ambig.ity of distance （scale） is resolved by usag. of parallel line seg.ents an the road imag..

关键词： vanishing.point 3D Reconstruction vehicle driver assistanoe

Epoxy resin nanocomposites reinforced with ionized liquid stabilized carbon nanotubes

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International Journal of Smart and Nano Materials 2011年第3期2卷 176-193页

作者： Zhe Wang.Xiong.ao Yang.Qiang.Wang.H.Thomas hahn Sang.g. Lee Kun-Hong.Lee Zhanhu g.o Mechanical&Aerospace Eng.neering.Department University of California Los AngelesLos AngelesCA 90095USA Integ.ated Composites Lab Dan F.Smith Department of Chemical EngineeringLamar UniversityBeaumontTX 77710USA Institute of Chemical and Eng.neering.Sciences(ICES) A-STARApplied Catalysis1Pesek RoadJurong Island627833 Singapore Department of Chemistry and Nano Science Ewha Womans UniversitySeoul 120-750Korea Department of Chemical Eng.neering Pohang University of Science and TechnologyPohang 790-784Korea

Epoxy resin nanocomposites reinforced with three different ionic liquid functionalized carbon nanotubes(f-CNTs)were fabricated by an in situ polymerization *** influence of the anions on the curing.process was studied throug. differential scanning.calorimetry(DSC)and normalized Fourier transform infrared(FTIR)*** composition of the nanocomposites was analyzed by X-ray photoelectron *** different mechanisms are proposed to explain the curing.process of the neat epoxy and its *** electric conductivity and mechanical properties of the nanocomposites are also *** tensile streng.h was increased dramatically due to the insertion of *** electron microsopy fracture surface analysis indicates a strong.interfacial bonding.between the carbon nanotubes and the polymer matrix.

关键词： epoxy resin nanocomposite carbon nanotube ionic liquid functionalization

Effects of tissue-cultured mountain g.nseng.（Panax g.nseng.CA Meyer） extract on male patients with erectile dysfunction

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Asian Journal of Androlog. 2009年第3期11卷 356-361页

作者： Tae-Hwan Kim Seung.Hyun Jeon Eun-Joo hahn Kee-Yoeup Paek Jong.Kwan Park Nae Young.Youn Hyung.Lae Lee Department of Urolog. School of Medicine Kyung Hee University Seoul 134-727 Korea Research Center for the Development of Advanced Horticultural Technolog. Chungbuk National University Cheongju 361-711 Korea Department of Urolog. Chonbuk National University Medical School Jeonju 561-712 Korea Infertility Clinic Sanbornjeil Women＇s Hospital Kunpo 435-042 Korea

Korean g.nseng.and mountain g.nseng.（Panax g.nseng.CA Meyer） are important traditional herbal plants whose g.nsenosides are g.nerally accepted as serving.to improve sexual functions, such as penile erection. We investig.ted the effects of tissue-cultured mountain g.nseng.extract （TMg.） on male patients with erectile dysfunction （ED）. A double-blind, placebo-controlled study was conducted with 143 patients experiencing.ED. Over the course of 8 weeks, one g.oup took 1 000 mg.of TMg. twice a day, and the other g.oup took 1 000 mg.of placebo twice a day. The effects of the TMg. and the placebo were analyzed using.the Korean version of the International Index of Erectile Function （IIEF） questionnaire. A total of 86 patients completed 8 weeks of treatment. The scores on the five domains of the IIEF after medication were sig.ificantly hig.er than the baseline scores in the g.oup treated with TMg. （P 〈 0.05）, whereas no sig.ificant improvement was observed in the placebo g.oup （P 〉 0.05）. Erectile function and overall satisfaction scores after medication were sig.ificantly hig.er in the TMg. g.oup than in the placebo g.oup （P 〈 0.05）. Erectile function of patients in the TMg.-treated g.oup sig.ificantly improved, sug.esting.that TMg. could be utilized for improving.erectile function in male patients.

关键词： erectile dysfunction Panax g.nseng tissue-cultured mountain g.nseng.extract

Risk Assessment Using.Two Different Diag.ostic Tools: Metabolic Syndrome and Cardiovascular Risk Score (SCORE)—Data from a Weig.t Reduction Intervention Study

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Food and Nutrition Sciences 2013年第10期4卷 1028-1036页

作者： Janina Willers Andreas hahn Institute of Food Science and Human Nutrition Leibniz University Hannover Hannover Germany.

Objective: Risk score models and the diag.osis of a metabolic syndrome are useful for cardiovascular (CV) risk prediction. The identification of individuals with hig. CV and metabolic risk is essential to provide appropriate prevention and therapy. The present study aims at clarifying.whether these indicators are altered by a weig.t reduction prog.amme. Additionally, which diag.ostic tool has a better predictive value is examined. Method: One hundred and twenty overweig.t and obese subjects ag.d 30 60 years were included in a 12-week weig.t reduction prog.amme. The CV risk was assessed by means of g.rman multiple-used risk charts (SCORE) at baseline and at the end of the trial. Furthermore, the prevalence of the metabolic syndrome (three out of five risk factors) was quantified. Results: The initial prevalence of the metabolic syndrome was 63.3% (n = 76) and decreased to 41.7% (n = 50) by the end of the intervention. The SCORE also decreased sig.ificantly after twelve weeks (p 5%) was comparatively low (t0: 7.4%, n = 7;t12: 5.3%, n = 5). Conclusion: The weig.t reduction concept was applicable to improve the CV risk SCORE and decrease the prevalence of the metabolic syndrome. The CV 10-year risk calculated using.g.rman risk charts (SCORE) probably underestimated the risk of CV diseases in this collective. In this case, the diag.osis of a metabolic syndrome is more meaning.ul than risk SCORE calculations.

关键词： Weig.t Reduction Cardiovascular Risk Score Metabolic Syndrome

聚硅氯化铝(PASiC)混凝剂的特性及絮凝动态过程

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中国环境科学 2002年第3期22卷 227-230页

作者：岳钦艳高宝玉 H.H.hahn E.Hoffmann 山东大学环境科学与工程学院山东济南250100 InstituteofAquaticEnvironmentalEng.neering

采用共聚与复合两种制备工艺,分别制备出具有不同碱化度(B)和不同Al/Si摩尔比系列的商用聚硅氯化铝(PASiC)混凝剂,并分别采用颗粒粒径测定方法和流动电流(SC)测定技术研究比较了PASiC和聚合氯化铝(PAC)混凝剂的颗粒大小、电动特性和凝... 详细信息

采用共聚与复合两种制备工艺,分别制备出具有不同碱化度(B)和不同Al/Si摩尔比系列的商用聚硅氯化铝(PASiC)混凝剂,并分别采用颗粒粒径测定方法和流动电流(SC)测定技术研究比较了PASiC和聚合氯化铝(PAC)混凝剂的颗粒大小、电动特性和凝聚絮凝动态过程.结果表明,Al/Si摩尔比、B值和制备工艺影响PASiC的聚合和带电特性.Al/Si摩尔比越小和B值越大,PASiC的颗粒就越大;在相同的B值下,PASiC较PAC具有更大的颗粒粒径.PASiC的电中和能力较PAC有所下降,且Al/Si摩尔比越小,PASiC的电中和能力下降越多;与PAC相比,PASiC具有更快的凝聚絮凝速度和形成更大的絮体;且Al/Si摩尔比越小,PASiC形成的絮体就越大.

关键词：聚硅氯化铝 PASiC 混凝剂特性絮凝动态过程颗粒大小流动电流