Materials Literature
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摘要： 由于大型直缝焊管的特殊性，多采用三点弯曲多次矫直的方法修正其直线度。基于平面弯曲弹复理论及过弯矫直等价原理，给出基于管件初始挠度曲线分布的理论矫直弯矩，施加该理论弯矩可将管件一次性完全矫直。为方便工业应用，将该弯矩离散线性化，提出多点弯曲一次性矫直控制策略，并给出相应的工艺参数的确定方法。通过实测大型管件挠度分布，建立大型管件多点弯曲一次性矫直的数值仿真模型，并以小尺寸管件的物理模拟试验验证仿真模型的可靠性。对实际管件的仿真模拟结果验证多点弯曲一次性矫直控制策略的可行性，为全自动矫直机的设计和应用提供理论基础。
The inclusion of natural rubber latex into the Metakaoline blended concrete improves the performance properties of the concrete. Metakaoline in concrete reduces the porosity in the concrete on account of its pozzolanic reactions. Natural rubber latex modifies the concrete by improving the workability of concrete throu…
Radiative Heat Transport through Vapor Plasma for Fusion Heat Flux Studies and Electrothermal Plasma Sources Applications High heat fluxes of up to 100 GW/m2 and greater over a discharge period of 100 to 1000 μs can be generated from electrothermal (ET) plasma sources from the confined arc discharge. Sources with inpu…
Abstract Electrochemical double layer capacitors (EDLCs) and hybrid devices (HDs) become more and more popular solutions in various green energy technologies, in particular, in hybrid transport and wind power stations. After many years of research in EDLC and in HD technology we have developed some approaches and meth…
To study the effect of rare earth element doping on the electronic structure of monolayer MoS2, the lattice parameters, band structures, density of states, and electron density differences of La, Ce and Nd doped and intrinsic monolayer MoS2 are calculated, respectively, using first-principles density functional theory…
Poly (vinyl alcohol) (PVA) nanofibers were prepared via electrospinning of concentrated PVA solutions. The nanofibers were crosslinked to enhance their resistance against the moisture. The chemical crosslinking of the nanofibers was carried out using glutaraldehyde as crosslinking agent in the presence of hydrochlorid…
Lanthanum tellurite (95-x)TeO2-5La2O3-xTiO2, (x = 0 - 20 mol%) glasses were prepared by the melt-quenching method. Elastic and structural properties of the glasses were studied by measuring sound velocity using the pulse-echo-overlap technique and Fourier Transform Infrared (FTIR) spectroscopy, respectively. In additi…
Hemidesmus indicus commonly known as Anantmool belongs to the family of Periplocaceae and it is used as a folk medicine and found to be an important medicinal ingredient from ancient ayurveda period to this 20 th century. This climbing vine plant is a common inhabitant of Gangetic India and West Benagl. It has several…
The TTE voltage effect was greatly improved by constructing the artificial multilayer structure of STO/NSTO with accurate inclined orientation.
Interaction between PbS nano-dendrites and yeast cells lead to degradation of dendrites, cell wall damage and ROS accumulation.
By choosing V-shaped ligands, Cu2+ cations and isopolymolybdates as starting materials, a novel double helical compound [Cu(H2O)(bimb)]2[β-Mo8O26] (1) (bimb = 1,3-bis(1-imidazoly)benzene) was hydrothermally synthesized and characterized by elemental analyses, single-crystal X-ray diffraction, powder X-ray diffraction…
Ni-YSZ (yttria-stabilized zirconia) cermets are known to be very good anodes in solid oxide fuel cells (SOFCs), which are typically operated at 700-1000 °C. However, they are expected to be increasingly degraded as the operating temperature is lowered in the presence of H2S (5-10 ppm) in the H2 fuel stream. However, a…
Muitos estudos recentes estão direcionados à área de produção de nanocompósitos poliolefínicos já que eles melhoram as propriedades dos polímeros em muitas aplicações. O desafio mais importante é a obtenção de uma boa dispersão das cargas de reforço na matriz polimérica. É consenso nos estudos realizados que a dispers…
Oil gels were prepared using chemically cross-linked copolymer, composed of poly(trimethylene carbonate) derivative and poly( <sc>l</sc> -lactide), possibly forming stereocomplex with poly( <sc>d</sc> -lactide).
The first all-alkaline-earth beryllium borate with fluorine anions, Ca3Be6B5O16F, was synthesized by a spontaneous crystallization flux method using LiF-B2O3 as the flux. The structural framework of Ca3Be6B5O16F is composed of the inter-connected [Be6B3O16] and [BO3] fundamental building blocks, with [CaO7F] distorted…
Heavily oxidized porous silicon exhibits a strong blue light emission band including a long-lived phosphorescence component, particularly strong below 200 K. Its origin is related to molecular species in the silicon/silicon oxide nanostructure. In this paper, we show that porous glass also exhibits the same phenomenon…
Photoisomerizations of a newly designed azobenzene derivative reversibly change its self-assembly in a solution to form twisted supramolecular nanofibers and amorphous aggregates, respectively. When irradiating the sample solution with audible sound, the former assembly exhibits a LD response due to its hydrodynamic o…
The adsorption of ethanolic root extract of Portulaca oleracea as corrosion inhibitor for the corrosion of mild steel in H 2 SO 4 medium at the temperature range of 305K to 315 K was studied using weight loss method and characterized using the common adsorption isotherms. The inhibition efficiency, IE%, was found to i…
We report the fabrication of the hybrids of sugar-modified PPAs/MWCNTs, and the reinforcement of chitosan rods with the hybrids.
Electrochemical synthesis of polypyrrole (PPy) and polypyrrole / activated carbon (PPy / AC) - composite films, with a thickness between 0.5 and 15 ?m were performed in a three electrode cell containing 0.1 mol dm-3 Py, 0.5 mol dm-3 NaClO4 dissolved in ACN, and dispersed particles of AC (30 g dm-3). Electrochemical ch…