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您的检索式：作者名="P.VENKATACHALAM"
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| 1 | Effect of processing routes on microstructure and mechanical properties of 2014 Al alloy processed by equal channel angular pressing显示文摘Al-Cu alloy was deformed through equal channel angular pressing(ECAP) by routes A,Ba,Bc and C up to 5 passes.ECAP was done using a 90° die for three different conditions,namely 1) as received,2) solutionised at 768 K for 1 h and 3) solutionised at 768 K for 1 h + aged at 468 K for 5 h.The microstructure,microhardness and tensile strength were studied for all the three conditions and four routes.Significant improvement in hardness(HV 184 after five passes) and strength(602 MPa after three passes) was observed in solutionised and aged 2014 Al alloy deformed through route Bc.Microstructure evolution was reasonably equiaxed in route Bc with aspect ratio of 1.6.Solutionised and aged 2014 Al alloy deformed through route Bc was identified to have better microstructure and mechanical property than the other processing routes and conditions. | P.VENKATACHALAM S.RAMESH KUMAR B.RAVISANKAR V.THOMAS PAUL M.VIJAYALAKSHMI | 2010 | Transactions of Nonferrous Metals Society of China2010，20，10： | 6 |
| 2 | Performance Enhancement in Dye-Sensitized Solar Cells with Composite Mixtures of TiO_2 Nanoparticles and TiO_2 Nanotubes显示文摘In the present investigation,a new composite nanostructured photoanodes were prepared using TiO_2 nanotubes(TNTs) with TiO_2 nanoparticles(TNPs).TNPs were synthesized by sol-gel method,and TNTs were prepared through alkali hydrothermal method.Dye-sensitized solar cells(DSSCs) were fabricated with different photoanodes comprising of various ratios of TNTs + TNPs,synthetic indigo dye as photosensitizer,PMII(l-propyl-3-methylimidazolium iodide) as ionic liquid electrolyte and cobalt sulfide as counter electrode.The structures and morphologies of TNPs and TNTs were analyzed through X-ray diffractometer,transmission electron microscope and scanning electron microscopes.The results of the investigation showed that the DSSC-4 made with composite photoanode structure(TNTs/TNPs)(90% of TNPs + 10% of TNTs) had improved photocurrent efficiency(2.11%) than pure TNPs(1.00%) and TNT film(0.78%).Electrochemical impedance spectra revealed that the composite TNTs/TNPs film-based DSSCs possessed the lowest charge-transfer resistances and longest electron lifetime.Hence,it could be concluded that the composite TNTs/TNPs photoanode facilitates the charge transport rate and enhances the efficiencies of DSSCs. | D.Maheswari P.Venkatachalam | 2015 | Acta Metallurgica Sinica(English Letters)2015，28，3： | 5 |
| 3 | An algorithm for generating geometric buffers for vector feature layers显示文摘The paper presents an algorithm for constructing geometric buffers for vector feature layers and dissolving those buffers using a sweep-line approach and vector algebra.The algorithm works by first constructing a geometric buffer for a vector feature layer,then dissolving each single geometric buffer for that feature layer,and finally dissolving the overlapping buffers of the entire layer.The algorithm has been implemented successfully in a commercial Geographical Information System software package. | Sumeet BHATIA Viral VIRA Deepak CHOKSI P.VENKATACHALAM | 2013 | Geo-Spatial Information Science2013，16，2： | 2 |
| 4 | 橡胶基因组中一个与酿酒酵母脯氨酸特异性通透酶基因部分同源的多态性片段的克隆及序列测定显示文摘橡胶树(Hevea brasiliensis Muell.Arg).的传统种植区主要分布于高温多雨的热带地区,抗旱基因或DNA标记的筛选鉴定对于橡胶耐旱品系的选育及橡胶树向温光和雨量相对不足的非传统植胶区的拓展具有十分重要的意义。RAPD分析是目前遗传多态性研究及特异性基因片段鉴定最有效的分子学工具之一。本研究借助聚合酶链式反应(PCR)对来自37个橡胶无性系的基因组DNAs进行了RAPD分析。结果显示,多态性及特异性扩增条带的数量随无性系及引物的不同而有所差异,有些扩增带为一些无性系共有,而另一些则仅存在于个别或少数无性系之中。根据引物OPB-12的两个特异性扩增条带(1.2和1.4kb)在各无性系中单独或同时存在与否,我们鉴定出了两个相应的特异性RAPD标记,其中1.4kb扩增带尤其引人注目。克隆及测序结果表明,该RAPD片段与酿酒酵母(Saccharomyces cerevisiae)脯氨酸特异性通透酶基因存在一定程度同源性。针对该片段设计一对特异性引物并再次对基因组DNA进行更严格条件下的PCR扩增,结果从14个参试无性系中获得了该1.4kb条带。这种由RAPD标记通过特异性引物设计转化得到的SCAR(序列特异性扩增区)标记可用于橡胶树优良或特异性基因的筛选及鉴定。 | P.Venkatachalam 田郎 | 2013 | 世界热带农业信息2013，，4： | 0 |
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