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Variations in stir zone and thermomechanically affected zone of dissimilar friction stir weld of AA5083 and AA6082 alloys

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Transactions of Nonferrous Metals Society of China 2018年第12期28卷 2410-2418页

作者： U.DONATUS G.E.THOMPSON M.I.MOMOH N.B.MAlEDI I-l.TSAI raphael OlIVEIRA FERREIRA Z.lIU School of Materials The University of ManchesterManchester M13 9PLUK Department of Metallurgy Kogi State PolytechnicItakpeNigeria School of Chemical and Metallurgical Engineering University of the WitwatersrandWits2050South Africa Oxford Instruments NanoAnalysis HP12 2SEHigh WycombeUK Escola Politécnica da Universidade de Sao Paulo Av.Prof.Mello Moraes2463Sao PauloSPBrazil

Variations in composition,microhardness(in the thermomechanically affected zone)and texture in the tool domain of the dissimilar friction stir weld of AA5083-O and AA6082-T6alloys were *** contents of the major alloying elements in the weld zones were determined using inductively coupled plasma-atomic emission *** was observed that a slight drop in the content of the alloying elements results from the friction stir welding process with the Mg content being the most affected amongst the major alloying elements in the two *** relating the mass fractions of the major alloying elements in the parent metals of both alloys to those of the stir zone,the relative proportions of the two alloys in the stir zone were estimated with the results showing that at least60%of the materials in the stir zone are from the retreating side of the *** was also revealed that the changes in the hardness profile in the thermomechanically affected zone of the retreating side are predominantly influenced by changes in grain size in that ***,the investigation further revealed that the texture component in the tool shoulder domain is different from the texture component in the tool pin domain.

关键词： alloying element aluminium alloy friction stir welding parent metal

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Evaluation of Four Varieties of Sweetpotato (Ipomeoa Batatas (l.) lam) under Different Sources of Planting Material for Field Performance and Viral load

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Agricultural Sciences 2023年第8期14卷 1007-1021页

作者： Sumaila Mohammed raphael Adu-Gyamfi Edward Carey Ted Crop Science Department University for Development Studies Tamale Ghana International Potato Centre Nyankpala Office Tamale Ghana

Sweetpotato is an important crop for food security in many developing countries which is cultivated using vine cuttings. Studies have revealed that there are at least fifteen well characterized viruses known to infect sweetpotato of which 10 are economically important that contribute to yield reduction. Planting materials use by farmers are often infected by one or more of these viruses. The aim of this study was to evaluate three different sources of planting materials of different health status for their field performance and virus presence. The sources of planting materials were in vitro generated platelets, symptomless Field materials and Farmer’s materials. Four sweetpotato varieties Apomuden, Bohye, ligri and Dadanyuie were selected from each source of planting material. The trial was laid in a split plot design with the sources of planting material allocated to main plots and the varieties to sub-plots. The plantlets of the four varieties were planted at Botanga Irrigation Scheme in Northern region of Ghana. Viral symptom scores were taken twice, score 1 being the average from 4 - 7 weeks after planting (WAP) and score 2 being the average from 8 - 11 WAP. Nitrocellulose Membranes Enzyme linked Immunosorbent Assay (NCM-ElISA) kits were employed for the detection of sweetpotato viruses on the field. The source of planting materials significantly influenced (P In vitro generated material showed the least symptoms of virus followed by Field materials. Apomuden and Bohye varieties recorded the highest virus score in the first and second virus symptom observational score respectively. NCM-ElISA revealed that the viruses SPFMV, SPMMV, SPMSV, SPCFV, SPCSV, and CMV were significantly present among the different sources of planting materials. In vitro, Field and Farmer materials recorded NCM-ElISA score of 0.225, 1.075 and 1.500 respectively. Apomuden variety recorded the highest virus score in the assay. Vine and root yield was higher among the in vitro generated mate

关键词： In Vitro Plant Material Sweetpotato Virus NCM-ElISA

MODElS OF MESOPIC PHOTOMETRY APPlIED TO THE CONTRAST THRESHOlD OF PERIPHERAl AND FOVEAl OBJECTS

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MODELS OF MESOPIC PHOTOMETRY APPLIED TO THE CONTRAST THRESHO...

Comparison of ecological condition and conservation status of English yew population in two Austrian gene conservation forests

26th Session of the CIE

作者： raphael,Sabine leibenger Martin l-lAB University of Paderborn Germany l-lAB University of Paderborn Germany

＜正＞In a laboratory experiment the detection of a 0,7° sized object was tested with 40 test persons. Colored stimuli were presented at positions of 2°,6°,10°,and 14° eccentricity to determine the threshold contrast at different positions in the visual *** measured contrasts were used to compare several approaches to calculate the mesopic equivalent luminance for peripheral *** results show that models of mesopic photometry improve the description of contrast sensitivity for peripheral *** near foveal object the photopic contrast gives a better representation of detection than the calculated mesopic contrasts.

关键词： mesopic photometry threshold contrast

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Journal of Forestry Research 2007年第3期18卷 181-186页

作者： DHAR Amalesh RUPRECHT Herwig KlUMPP raphael VACIK Harald Institute of Silviculture Department of Forest and Soil Sciences University of Natural Resources and Applied Life Sciences Peter-Jordan Str. 82 A-1190 Vienna Austria.

English yew Taxus baccata l. has been catalogued as endangered tree species and prone to extinction in Austria as well as many other parts of Europe. The present work is based on the comparison of the natural population of two gene conservation forests from different geographic locations in Austria where the spatial structure, regeneration status and possible conservation measures are examined. The pole stand distribution varied distinctly in each sites. The total no of individuals per ha （DBH ≥5 cm）, average DBH and average height were 492 ***^-2, 8.8 cm and 6.3 m in Stiwollgraben whereas in leininger Riese 45 ***^-2, 16.3 cm and 7.6 m respectively. Over 79% of the Stiwollgraben population were represented the good health condition, while in leininger Riese it was less then 49 % which means population of Stiwollgraben is in better condition compared to leininger Riese. The sites differed considerably in the pattern of regeneration but pattern were consistent with the dynamics depicted by the age distribution. Considering the one-year-old seedlings Stiwollgraben contains 13 019 ***^-2 whereas leininger Riese only 1 368. Surprisingly there were no any saplings in respect of 51 to 150 cm height classes in both sites and 30 to 50 cm in Stiwollgraben. In that context the conservation of English yew on the forest level may require well-managed reserves and long-term rotations between harvest events, protection from the herbivore and reduction of competition, which will enhance the long-term viability of the species.

关键词： Endangered species Taxus baccata Population structure Forest management Conifers

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Shaping the light amplified in a multimode fiber

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light(Science & Applications) 2016年第1期5卷 250-258页

作者： raphael Florentin Vincent Kermene Joel Benoist Agnès Desfarges-Berthelemot Dominique Pagnoux Alain Barthélémy Jean-Pierre Huignard XlIM Research Institute Universitéde Limoges-Centre National de la Recherche ScientifiqueUMR 625287060 LimogesFrance Institut langevin ESPCI-ParisTech75238 ParisFrance

Propagation of light in multimode optical fibers usually gives a spatial and temporal randomization of the transmitted field similar to the propagation through scattering *** still applies when scattering or multimode propagation occurs in gain *** demonstrate that appropriate structuration of the input beam wavefront can shape the light amplified by a rareearth-doped multimode *** of the wavefront was achieved by a deformable mirror in combination with an iterative optimization *** present experimental results and simulations showing the shaping of a single sharp spot at different places in the output cross-section of an ytterbium-doped fiber *** and narrowing of the amplifier far-field pattern was realized as *** the wavefront to shape the amplified light can also serve to improve the effective *** shaping approach still works under gain saturation,showing the robustness of the *** and experiments attest that the shaping is effective even with a highly multimode fiber amplifier carrying up to 127 modes.

关键词： adaptive optics amplification beam shaping complex media multimode optical fiber

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从含铼的弱酸溶液中萃取钼

湿法冶金 1985年第1期 47-49+56页

作者： l.kara■iozov ,乔繁盛

本文研究了用常规萃取剂Aliquat 336从含铼的弱酸溶液（PH=1—3）中萃取钼的可能性。提出了温度对萃取影响的机理,特别是钼和铼的萃取机理。结果表明,选择性系数（β=DMo/DRe）取决于钼和铼的浓度以及溶液中NO3~浓度。当钼和硝酸根离子... 详细信息

本文研究了用常规萃取剂Aliquat 336从含铼的弱酸溶液（PH=1—3）中萃取钼的可能性。提出了温度对萃取影响的机理,特别是钼和铼的萃取机理。结果表明,选择性系数（β=DMo/DRe）取决于钼和铼的浓度以及溶液中NO3~浓度。当钼和硝酸根离子增加时,β亦随之增加;升高温度也有相同的效果。萃取时需补加添加剂:铼浓度较低时,最好用高分子醇作添加剂,铼浓度较高时,最好用乙酰苯作添加剂。作者认为研究结果可推广,若用三烷基胺（例如,三辛胺）作萃取剂,也能得到类似的结果。

关键词：选择性系数 NO 铂络合物铂化合物反离子酸溶液三辛胺温度升高

Assessment of Initial Investment Valuation Methodology of Brazilian Power Transmissions Auction

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Journal of Power and Energy Engineering 2017年第1期5卷 75-90页

作者： André l. V. Gimenes raphael B. Heideier Miguel E. M. Udaeta Marco A. Saidel Department of Electric Power and Automation Polytechnic School of the University of Sao Paulo Sao Paulo Brazil

This paper aims to assess the Initial Investment Valuation Methodology of the local regulator, facing the results of auctions, due to the high occurrence of low clearing prices observed from 2003 to 2008 and the high percentage of auctions without any bidder recently. The regulator investment forecasted defines the maximum value of Yearly Allowed Revenue and the bidder that offers the lowest YAR value wins the auction. The first type of analysis considers project cost, location, execution deadline, transmission line extension and type of all actions from 1999 to 2015, totalling about 3.361 billion USD. It was not found any correlation of those variables and the result of the actions. The second analysis compared the equipment and the additional costs breakdown of the regulator investment forecast with the real investment in projects from 2009 to 2013 and it rarely surpasses 5%. Suggestions are proposed based on the analysis.

关键词： Brazilian Auction Clearing Prices Transmission line Valuation

环氧乙烷环氧丙烷共聚的非离子型表面活性剂—“Pluronics”

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日用化学品科学 1979年第2期 9-11页

作者： l.raphael 刘家琏

最熟悉的非离子表面活性剂是环氧乙烷的缩合产品,聚氧乙烯链是亲水基团,而长链脂肪醇或者烷基酚形成疏水基团。环氧乙烷的链愈长,则水溶性愈好。但是在湿润状态下(formofwjttine)它的表面活性会降低。环氧丙烷的聚合物具有不同的性质,... 详细信息

最熟悉的非离子表面活性剂是环氧乙烷的缩合产品,聚氧乙烯链是亲水基团,而长链脂肪醇或者烷基酚形成疏水基团。环氧乙烷的链愈长,则水溶性愈好。但是在湿润状态下(formofwjttine)它的表面活性会降低。环氧丙烷的聚合物具有不同的性质,在其分子量大于900的时候,变为

关键词：环氧乙烷缩合氧化乙烯环氧化物 Pluronics 非离子型表面活性剂环氧丙烷熏蒸剂