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Defence Technology（防务技术） 2023年第1期19卷 1-11页

作者： Elango Natarajan Lídio Inacio Freitas M.S.Santhosh kalaimani markandan Ammar Abdulaziz Majeed Al-Talib C.S.Hassan Faculty of Engineering Technology and Built EnvironmentUCSI UniversityKuala LumpurMalaysia Dili Institute of Technology DiliTimor-Leste Selvam Composite Materials Research Laboratory Department of Mechanical EngineeringSelvam College of TechnologyTamil NaduIndia

Suitability of S-Glass/carbon fiber reinforced polymer composite for submarine hull subjected to hydrostatic pressure has been investigated in the present *** materials have raised concerns owing to their decomposition due to low resistance towards salinity and hence polymer composites have been explored to showcase their mechanical stability to withstand transverse and impact *** this end,the mechanical properties of S-Glass/carbon fiber reinforced polymer composite were experimentally investigated and higher specific strength and stiffness of the composite in comparison to many metallic materials used for submarine hull were *** obtained experimental values were used for the static and dynamic crash analysis of the bow,stern and foil through Finite Element Analysis(FEA);where depth of travel was varied from sea surface level of 0-7000 *** assembly was later developed with the optimum shape and thickness of each *** also report the nonlinear crash analysis upon impact at velocity ranging from 3 to 21 m/***,kinetic energy,acceleration peak and internal energy in struck submarine revealed that travel depth 1750 m and 3500 m is recommendable,more particularly,crash safety factor of the submarine is found to be within limit when submarine encounters crash at 1750 m.

关键词： Crash Impact Design Submarine Hull Bow Stern Foil

Additive manufacturing of composite materials and functionally graded structures using selective heat melting technique

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Journal of Materials Science & Technology 2020年第12期47卷 243-252页

作者： kalaimani markandan Ruijing Lim Pawan Kumar Kanaujia Ian Seetoh Muhammad Raziq bin Mohd Rosdi Zhi Huey Tey Jun Seng Goh Yee Cheong Lam Changquan Lai Temasek Laboratories Nanyang Technological University50 Nanyang Drive637553Singapore School of Physical&Mathematical Sciences Nanyang Technological University21 Nanyang Link637371Singapore School of Mechanical&Aerospace Engineering Nanyang Technological University50 Nanyang Avenue639798Singapore School of Materials Science&Engineering Nanyang Technological University50 Nanyang Avenue639798Singapore

The feasibility of using selective heat melting(SHM) to fabricate composite materials and functionally graded structures was *** report,for the first time,the successful 3 D printing of copper(Cu)-polyethylene(PE) composite,iron(Fe)-polyethylene(PE) composite and functionally graded CuO foams using the SHM *** was found that a low feed rate,high airflow rate and high airflow temperature were required for efficient delivery of heat from the emitted hot air to the powder bed,so that the PE binder particles can melt and form dense composites with smooth *** best mechanical properties were exhibited by composites with 80 vol.% PE,as lower PE concentrations led to deficient binding of the metal particles,while higher PE concentrations meant that very few metal particles were available to strengthen the *** strength exhibited by Cu-PE composites was comparable to engineering plastics such as polycarbonate,with the added advantage of being electrically *** average conductivity of the samples,0.152±0.28 S/m,was on par with physically crosslinked graphene *** subjecting a Cu-PE composite,with Cu concentration graded from 10 vol.% to 30 vol.%,to a high temperature debinding and sintering treatment in air,CuO foam with graded porosity can be *** CuO foam was observed to fail in a layer-by-layer manner under mechanical compression,which is a characteristic of functionally graded *** study shows that,compared to existing 3 D printing techniques,SHM can be cheaper,have wider material compatibility,occupy a smaller footprint and potentially induce less residual stresses in the fabricated ***,it could be a valuable complement to current additive manufacturing techniques for fabricating mechanically strong composite materials and functionally graded structures.

关键词： Selective heat melting Functionally graded materials Additive manufacturing Multimaterial

Diversity of Sodium Transporter HKT1;5 in Genus Oryza

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Rice science 2022年第1期29卷 31-46,I0002-I0017页

作者： Shalini PULIPATI Suji SOMASUNDARAM Nitika RANA Kavitha KUMARESAN Mohamed SHAFI Peter CIVÁŇ Gothandapani SELLAMUTHU Deepa JAGANATHAN Prasanna Venkatesan RAMARAVI S.PUNITHA kalaimani RAJU Shrikant S.MANTRI R.SOWDHAMINI Ajay PARIDA Gayatri VENKATARAMAN M.S.Swaminathan Research Foundation Chennai 600113India National Agri-Food Biotechnology Institute Punjab 140306India Krishi Vigyan Kendra Kanyakumari 629901India National Centre for Biological Sciences/Tata Institute of Fundamental Research Bangalore 560065India National Research Institute for Agriculture Food and Environment UniversityClermont-AuvergneClermont-Ferrand 63000France Forest Molecular Entomology Laboratory Faculty of Forestry and Wood SciencesCzech University of Life SciencesPraguePraha 16500Czech Republic Tamil Nadu Agricultural University Coimbatore 641003India International Business Machines India Chennai 600125India Institute of Life Sciences Bhubaneswar 751023India

Asian cultivated rice shows allelic variation in sodium transporter,OsHKT1;5,correlating with shoot sodium exclusion(salinity tolerance).These changes map to intra/extracellularly-oriented loops that occur between four transmembrane-P loop-transmembrane(MPM)motifs in OsHKT1;***1;5 sequences from more recently evolved Oryza species(***/*** complex species)contain two expansions that involve two intracellularly oriented loops/helical regions between MPM domains,potentially governing transport characteristics,while more ancestral HKT1;5 sequences have shorter intracellular *** compared homology models for homoeologous OcHKT 1;5-K and OcHKT1;5-L from halophytic *** to identify complementary amino acid residues in OcHKT1;5-L that potentially enhance affinity for Na+.Using haplotyping,we showed that Asian cultivated rice accessions only have a fraction of HKT1;5 diversity available in progenitor wild rice species(*** and ***).Progenitor HKT1;5 haplotypes can thus be used as novel potential donors for enhancing cultivated rice salinity *** Asian rice accessions,10 non-synonymous HKT1;5 haplotypic groups *** HKT1;5 haplotypic diversities occur in cultivated indica gene pool compared to *** Haplotypes 2 and 10 occur in mutually exclusive japonica and indica groups,corresponding to haplotypes in *** salt-sensitive and salt-tolerant landraces,*** distinct haplotype partitioning may have originated in separate ancestral gene pools of indica and japonica,or from different haplotypes selected during *** of specific HKT1;5 haplotypes within the 3000 rice dataset may relate to eco-physiological fitness in specific geo-climatic and/or edaphic contexts.

关键词： HKT1 5 diversity single nucleotide polymorphism haplotype bacterial artificial chromosome salinity tolerance sodium transporter Oryza species

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人造园林中斑文鸟和白腰文鸟的巢址选择

四川动物 2020年第3期39卷 316-322页

作者：孙楠刘晨阳 KONGKASAWAT Jittima AYUTHAVEL kalaimani TUN Nay Lin AWASTHI Balram 权锐昌刘泽华青海师范大学生命科学学院西宁810008 中国科学院西双版纳热带植物园综合保护中心云南西双版纳666303 泰国纳柯运河野生动物保护区泰国拉农府85120 印度马伊拉杜图赖大学动物学和野生生物学系印度泰米尔纳德邦609305 中国科学院昆明植物研究所昆明650201 尼泊尔特里布万大学动物学系尼泊尔加德满都10400

巢址选择对保证鸟类生存和繁殖成功、降低被捕食率和种间竞争至关重要。2016—2017年,在中国科学院西双版纳热带植物园选取3个研究区域对同域分布的斑文鸟Lonchura punctulata和白腰文鸟Lonchura striata进行调查。在记录的15个巢址特... 详细信息

巢址选择对保证鸟类生存和繁殖成功、降低被捕食率和种间竞争至关重要。2016—2017年,在中国科学院西双版纳热带植物园选取3个研究区域对同域分布的斑文鸟Lonchura punctulata和白腰文鸟Lonchura striata进行调查。在记录的15个巢址特征因子中,14个数值型因子用于拟合Logistic回归模型,找出影响文鸟巢址选择的关键因子;使用独立样本t检验和Mann-Whitney U检验比较2种文鸟在巢址特征因子选择上的差异性;置换检验(Permutation test)用于检验2种文鸟对营巢树种选择偏好的差异性。研究发现,2种文鸟的巢址分布模式在3个研究区域中的差异很大。异种鸟巢间最小间距、营巢树胸径、营巢树与水源最近距离以及巢位高度都是影响巢址选择的关键因子。与白腰文鸟相比,斑文鸟通常选择在胸径更小、位置更高、距离异种鸟巢更远、距离水源更近的地方营巢。斑文鸟多选择枝条紧密的树,而白腰文鸟多选择枝干带刺的树营巢,这可能是二者不同的对抗捕食者的防御策略。

关键词：斑文鸟白腰文鸟巢址选择生态位分化人造园林