Materials Literature
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Methodological approach to students research-oriented teaching of basics of mathematical modeling of real processes is developed. The application of the method is described through an example of theoretical analysis of elastic electron scattering from solid surface phenomenon.
PEMFC (Proton Exchange Membrane Fuel Cell) is a low temperature fuel cells which are high efficient and clean energy. But it has many problems like economical efficiency or durability. Because of this reason, many researchers challenge various view points. One of challenge is the flow channel design and many researche…
Yuqian silkworm varieties with green cocoon were tested in indoor and regional experiments to utilize the special germplasm resource.The results from the indoor experiment showed that the average total cocoon weight,cocoon shell weight,cocoon shell rate,cocoon yield/10 000 silkworms and silkworm chrysalis life rate of…
Les dendrimeres representent une nouvelle classe de composes organiques utilises dans de nombreux domaines d’application tels que la medecine, et notamment, grâce a leur architecture spherique parfaitement ordonnee, definie et hyperbranchee. Sur la base de nos recents resultats tres prometteurs avec les dendrimeres PA…
Shirish Beri——印度建筑领域(19)80年代的起承者,他的作品始终被认为是印度建筑于1975年后的现代风格的典范。1980年及次年,Shirish Beri的名字列入《旁观者》的年鉴。意大利UTET出版社编写的《当代建筑词典》也列有他的尊名。《亚洲建筑系列丛书》、印度建筑规划50年回顾展都将其设计作为重要作品收揽。Shirish Beri的设计致力于通过多样的自然和人为色彩来表现统一和谐;思考自然、环境、他者的存在;探讨人类的渴望和价值。他称自己为追问生活、博爱生活的建筑师。正是本着爱智慧、爱生活、爱人类的情怀,Shirish Beri愉快而又专业地接受了本刊的采访。
Plasmons generation by interaction of electromagnetic field with periodic micro-nanostructures of noble metals, opens interesting possibilities both for handling of electronic signals as well as in atomic and molecular spectroscopy. Plasmon interactions and effects has evolved to a new and dynamic area of investigatio…
Layered vanadyl phosphate dihydrate, VOPO4·2H2O is one of the precursor to vanadyl pyrophosphate (VPO) catalyst which is the sole catalyst used industrially for the partial oxidation of n-butane to maleic anhydride. With a basal spacing of 0.74 nm, layered VOPO4·2H2O was used as the host and Co-complex (Co(acac)2) as…
peer reviewed
The Philippines is a sachet country - small packets of products are produced by manufacturing companies to penetrate the mass market. Plastics raise various environmental concerns as they release toxic pollutants, greenhouse gasses, cause soil and water pollution. This study looks into building a low cost compression…
介绍了采用高温固相法合成掺铬Li4Ti5O12作为锂离子电池负极材料,并对材料进行了X射线衍射分析、SEM、电化学阻抗测试、循环伏安测试及恒电流充放电测试。铬的掺杂并未改变材料的晶体结构,但降低了材料的规整度。实验结果表明：铬的掺杂在一定程度上改善了锂钛氧化合物的电化学性能,降低了电极极化,在电极表面未形成钝化膜。其中以掺杂比为Cr∶Ti=1∶10（原子比）的材料性能最好,首次放电比容量可达到175mAh/g,经过50次循环后,放电容量仍保持在166.5mAh/g。
The process of corrosion st.3 steel in water with thiocarbohydrazide additives had been tested by gravimetric, electrochemical and physics-chemical (UVand IR-spectroscopy, XR-structure analysis) methods. It was shown that thiocarbohydraz de additives in water decreased the steel corrosion. The corrosion rate decreased…
Processing magnetic materials to tailor microstructures with specific crystallographic textures can be accomplished using the magnetic field liquid phase sintering method (MFLPS), which is currently being developed at Boise State University. This process allows us to align the individual grains and modify the magnetic…
Pemanfaatan material komposit pada saat ini semakin berkembang, seiring dengan meningkatnya penggunaan bahan tersebut yang semakin meluas mulai dari yang sederhana seperti alat-alat rumah tangga sampai sektor industri. Serat sabut kelapa yang dikombinasikan dengan polyester sebagai matriks akan dapat menghasilkan komp…
The influence of load speed on processes of creepage is considered at microand nano-indentation of the irradiated and non-irradiated crystals LiF.
This work deals with laser beam welding of AM60 magnesium alloy. It concerns experimental investigations and numerical simulations. The experimental study aims to investigate metallurgical and mechanical process consequences on studied alloy and to validate thermal model results. Firstly, a parametric study allows the…
As a consequence of the decision to dismiss the four Italian Nuclear Power Plants (NPP), Trino Vercellese NPP will be the first NPP dismantled in Italy. Trino Vercellese decommissioning activities will end by 2013 and will produce in this period a small release of radionuclides in the atmosphere and in the surface wat…
Development of new high-performance polymer membranes that retain their proton conductivity under low humidity conditions is one of the most critical requirements to commercialize PEMFC systems. Current sulfonated proton exchange membranes acquire proton conductivity by water that solvates ion and carries proton. Cons…
利用溶胶-凝胶技术制备Eu^3＋、V共掺杂的SiO2材料，通过差热-热重分析、傅立叶红外光谱、X射线衍射、激发光谱与发射光谱等测试手段对粉末的晶型、结构、发光性质进行研究．结果表明：材料属于非晶态，800℃退火后Eu^3＋、V共掺杂的SiO2样品的结构基本稳定，只存在SiO2的网状结构；激发光谱显示，Eu-O电荷迁移带随着V掺杂量的增加而消失，产生强度较大的320nm处的7^F0→5^H3跃迁；发射光谱显示．随着V的掺人，最佳激发波长由393nm向320nm转移，同时出现了467nm，577nm，588nm，612nm处的发射峰，它们分别归属于Eu^3＋的5^D2→7^F0跃迁与VO4^3-的蓝色发射的叠加跃迁、Eu^3＋的5^D…
用溶胶-凝胶法制备了La0.8Ba0.2MnO3纳米粉体材料，对样品的凝胶进行热差热熏和红外光谱分析，结果表明，凝胶的加热煅烧过程中可以分为脱吸附水、有机物分解、硝酸根分解和钙态矿形成四个阶段。X射线衍射分析表明它是单一的钙态矿结构，扫描电子显微镜分析表明粉体呈球形巍径约80nm。
Results of mathematical modeling of a plastic current in top of the stopped crack are resulted. Two stages of the process corresponding to loaded and unloaded samples are allocated. It is shown that at the second stage of reversible movement of dispositions in a plastic zone and partial curing of a crack takes place.