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| 1 | 焊接参数对搅拌摩擦焊接AA2219-T87材料韧性、洋葱圆环的断裂行为的影响(英文)显示文摘与熔焊相比,搅拌摩擦焊可以更好地保持材料的韧性和塑性,提高焊接的抗裂稳定性。本研究旨在提高焊接接头的延性和强度。刀具廓形在保持延性、分析金属流动行为和确定断裂起始点等方面起着重要作用。分析了洋葱圆环不同区域的微观结构,得出了洋葱圆环强度与金属流型的关系。结果表明,洋葱圆环强化了焊缝熔核。肩部和锥形螺纹型线刀具具有优异的力学性能。显微硬度数据表明,断口经过热影响区和热机械影响区等低硬度区。扫描电镜图像显示了细长的晶粒和韧窝,证实了断裂为韧性断裂。 | Dinesh KUMAR R S MUTHUKUMARAN Vincent XAVIER T VENKATESWARAN D SIVAKUMAR | 2019 | Journal of Central South University2019，26，9： | 2 |
| 2 | Institutional sources of boundary-spanning structures:the establishment of investor relations departments in the fortune 500 industfials显示文摘 | Rao Hayagreeva Kumar Sivakumar | 1999 | Organization Science1999，，10： | 1 |
| 3 | Synthesis,antimyeobaeterial activity evaluation, and QSAR studies of chalcone derivatives 显示文摘 | P M Sivakumar S Prabu Seenivasan Vanaja Kumar Mukesh Doble | 2007 | Bioorganic & Medicinal Chemistry Letters2007，17，6： | 1 |
| 4 | Seasonal variations in composting pro- cess of dead poultry birds显示文摘 | Sivakumar K Kumar V R S Jagatheesan P N R | 2008 | Bioresource Technology2008，99，： | 1 |
| 5 | Ethosomes-a priority in transdermal drug delivery显示文摘 | KUMAR K P RADHIKA P R SIVAKUMAR T | 2010 | International Journal of Advances in Pharmaceutical Sciences2010，1，2： | 1 |
| 6 | Seasonal variations in composting process of deadpouhry birds 显示文摘 | Sivakumar K Kumar V R S Jagatheesan P N R | 2008 | Biore- source Technology2008，99，： | 1 |
| 7 | Large deflection of constant curvature beam under followe load显示文摘 | NALLATHAMBI Ashok Kumar RAO C Lakshmana SRINIVASAN Sivakumar M | 2010 | International Journal of Mechanical Sciences2010，52，： | 1 |
| 8 | Isolation and screening of endophytic actinomycetes from different parts of Emblica officinalis显示文摘 | Kumar U Singh A SivaKumar T | 2011 | Annals of Biological Research2011，2，4： | 1 |
| 9 | Synthesis,antimycobacterial activity evaluation,and QSAR studies of chalcone derivatives显示文摘 | SIVAKUMAR P M PRABU SEENIVASAN S VANAJA KUMAR | 2007 | Bioorganic & Medicinal Chemistry Letters2007，17，： | 1 |
| 10 | Mechanical behavior of molybdenum disilicide reinforced si- licon carbide composites显示文摘 | Kumar R Suresh Sivakumar D Venkateswarlu K | 2011 | Script Mater2011，65，9： | 1 |
| 11 | Development of hydroxyapatite derived from Indian coral 显示文摘 | Sivakumar M Kumar TS Shantha KL | 1996 | Biomateri- als1996，17，17： | 1 |
| 12 | An association between acquired epiphora and the signs and symptoms of chronic rhinosinusitis: a prospective case-control study显示文摘 | Annamalai S Kumar N A Madkour M B Sivakumar S Kubba H | 2003 | Am J Rhonol2003，17，： | 1 |
| 13 | Development of Hydroxyapatite Derived from Indian Coral显示文摘 | Sivakumar M Kumar T S S Shantha K L | | 0，，17： | 1 |
| 14 | Direct radiative forcing of urban aerosols over Pretoria(25.75°S, 28.28°E) using AERONET Sunphotometer data:First scientific results and environmental impact显示文摘The present study uses the data collected from Cimel Sunphotometer of Aerosol Robotic Network(AERONET)for the period from January to December,2012 over an urban site,Pretoria(PTR;25.75°S,28.28°E,1449 m above sea level),South Africa.We found that monthly mean aerosol optical depth(AOD,τa)exhibits two maxima that occurred in summer(February)and winter(August)having values of 0.36±0.19 and 0.25±0.14,respectively,high-to-moderate values in spring and thereafter,decreases from autumn with a minima in early winter(June)0.12±0.07.The Angstrom exponents(α440–870)likewise,have its peak in summer(January)1.70±0.21 and lowest in early winter(June)1.38±0.26,while the columnar water vapor(CWV)followed AOD pattern with high values(summer)at the beginning of the year(February,2.10±0.37 cm)and low values(winter)in the middle of the year(July,0.66±0.21 cm).The volume size distribution(VSD)in the fine-mode is higher in the summer and spring seasons,whereas in the coarse mode the VSD is higher in the winter and lower in the summer due to the hygroscopic growth of aerosol particles.The single scattering albedo(SSA)ranged from 0.85 to 0.96 at 440 nm over PTR for the entire study period.The averaged aerosol radiative forcing(ARF)computed using SBDART model at the top of the atmosphere(TOA)was-8.78±3.1 W/m2,while at the surface it was-25.69±8.1 W/m2leading to an atmospheric forcing of+16.91±6.8 W/m2,indicating significant heating of the atmosphere with a mean of 0.47 K/day. | Ayodele Joseph Adesina Kanike Raghavendra Kumar Venkataraman Sivakumar Derek Griffith | 2014 | Journal of Environmental Sciences2014，26，12： | 1 |
| 15 | Mukesh doble experimental and theoretical approaches to enhance anti tubercular activity of chalcones 显示文摘 | Sivakumar P M Vanaja Kumar Prabu Seenivasan S | 2010 | Wseas Transactions on Biology and Biomedicine2010，7，2： | 1 |
| 16 | Institutional Sources of Boundary-Spanning Structures: The Establishment of Investor Relations Departments in the Fortune 500 Industrials显示文摘 | Hayagreeva Rao Kumar Sivakumar | 1999 | Organization Science1999，，1： | 1 |
| 17 | Institutional sources of boundary-spanning structure: the establishment of investor relations departments in Fortune 500 industrials显示文摘 | Rao Hayagreeva and Sivakumar Kumar | 1999 | Organization Science1999，1，1： | 1 |
| 18 | Composting of poultry carcass with farm yard manure in summer 显示文摘 | Sivakumar K Kumar V R S Amanullah M M | 2007 | Research Journal of Agriculture and Biological Science2007，3，5： | 1 |
| 19 | Institutional Sources of Boundary-spanning Structures:the Establishment of Investor Relations Departments in the Fortune 500 Industrials显示文摘 | Rio Hayagreeva Kumar Sivakumar | 1999 | Organization Science1999，，10： | 1 |
| 20 | Research on marine actinobacteria in India显示文摘 | K. Sivakumar Maloy Kumar Sahu T. Thangaradjou L. Kannan | 2007 | Indian Journal of Microbiology2007，，3： | 1 |
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