Materials Literature
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Stainless steels suffer from pitting corrosion in chloride-containing environments. Sulfide inclusions, such as MnS, are known to act as the initiation sites of pitting. The pit initiation mechanism at MnS inclusions in chloride-containing environments is as follows: 1) dissolution of MnS inclusions leads to the depos…
The porous SnO2 photoelectrode coated by ultra-thin alumina through atomic layer deposition (ALD) technique for purpose of suppressing the interfacial charge recombination is explored in this paper. We find that an ultra-thin Al2O3 coating on mesoporous SnO2 photoelectrode significantly improves the open-circuit volta…
In this paper, finite element analysis is used to analyze the torque of Permanent Magnet Synchronous Motor (PMSM) of electric vehicle. Firstly, a 2D model of the PMSM is made. By forming magnetic field lines and flux density distribution of the PMSM with no-load condition, the accuracy of the model can be verified. Se…
The basic theory and design method of a broad-band spatial heterodyne interferometric spectrometer was researched based on the multi-order diffraction of echelle grating. The characteristics of the heterodyne interferometric spectrometer was described and the relationships between the instrument performance parameters…
摘要： 为了分析外来撞击物对单层板结构的撞击特性及机理，以及结构防护特性的影响因素，利用一级气炮进行单层金属板撞击试验，同时利用理论模型对试验结果进行分析。根据试验结果分析，特别地，在理论模型中引入一个因子对靶体厚度进行修正。基于撞击试验数据，通过理论模型研究不同厚度的单层金属板对卵形，平头以及半球形头杆弹的抗侵彻特性，揭示了靶体厚度和弹体头部形状对抗侵彻性能与失效模式的影响。理论模型计算结果与试验数据进行了比较，发现二者吻合得较好。理论模型计算结果试验表明：靶体弹道极限随弹体头部曲率直径比(Caliber-radius-head, CRH )先增大后减小，最后变化趋势比较平缓。在一定的厚度范围内，靶体的弹道极限随其厚度增加而增加。
Nanomaterials are used in various industrial applications and products as well as for numerous biomedical purposes. Nanoparticles (NPs) have remarkably different physicochemical properties than their conventional bulk materials and thus present possible dangers, both medically and environmentally. The potential for th…
We demonstrate a new class of nanostructure termed photonic hypercrystal which combines properties of photonic crystals and metamaterials. Enhanced radiative decay by factor of 20 and light extraction by 100 is observed from embedded quantum dots.
Composites based on polypropylene (iPP) modified with a sorbitol derivative (NX8000) and siloxane-silsesquioxane resin (SiOPh) containing maleated polypropylene (MAPP) as compatibilizer were prepared by melt extrusion. Calorimetric investigations were carried out using differential scanning calorimetry (DSC), whereas…
Organic electronic devices, such as conducting polymer and/or perovskite based solar cells are highly promising and emerging, but they are highly unstable in the presence of moisture and oxygen. It is important to protect these devices from these deterrent gases by using a suitable encapsulant and to improve the lifet…
The shelf life estimating of instant cassava were determined by analyzing the moisture sorption of it. The instant cassava was made into cube form with dimension of 0,5 cm x 0,5 cm x 0,5 cm and used as samples to analyzing the moisture sorption isotherm characteristic. Moisture sorption isotherms of it were determined…
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Energy selective surface (ESS) proposed in recent years is one of the most effective means for defending high intensity electromagnetic wave attacking. This paper presents an improved ESS structure and its systematic design method. An ESS prototype is designed and fabricated based on a given requirement. Its insertion…
Porous carbons were prepared by KOH activation of rice husk char at alkali/char ratios of 0.6︰1 to 3︰1 and activation temperatures from 640℃ to 780 ℃.The obtained porous carbons were characterized using N 2 adsorption and desorption technique, CO 2 adsorption, TG-FTIR analyses.The results indicate that the ultramicrop…
We aim to present a relaxation model that can be used in real simulations of dilute multicomponent reacting gases. The kinetic framework is the semi-classical approach with only one variable for the internal energy modes. The relaxation times for the internal energy modes are assumed to be smaller than the chemistry c…
Золоторудные месторождения Копыловское и Кавказ (Артемовский рудный узел, Бодайбинский район) залегают в терригенной углеродистой толще догалдынской свиты бодайбинской серии верхнего протерозоя и приурочены к ядерным частям антиклинальных структур высоких порядков. На них выделяются золото-сульфидный и золото-сульфидн…
Asparagus racemosus Willd. is a medicinal plant belonging to the family Asparagaceae, found in tropical and subtropical regions of India. The present study has been attempted to explore the antibacterial activity of the root extracts of the plant against pathogenic bacteria. The plant material was defatted with petrol…
As a preliminary study of fiber figure evaluation, the methodology of fiber orientation and aspect ratio calculation, especially that used in card webs, is discussed. To determine the fiber direction, the maximum variance method is introduced. In this method, we can derive the fiber’s main direction, which satisfies t…
Electrodeposition of nickel onto copper in a system of low Ni2+ concentration and at a narrow interelectrode gap has been carried out. This electrochemical system was required for maskless pattern transfer through electroplating (Enface technique). Kinetics of Electrochemical reaction of Nickel is relatively slow, whe…
Pyropheophorbide-a methyl ester and its 13 2 -oxoed derivatives were used as starting material, and the oxygen-containing functional groups were established on the chlorin periphery by oxygenation with agent and allomerization. The functional group transformation was carried out by classic reactions including Wittig a…
Biological synthesis of silver nanoparticles is generally a time-consuming process in comparison to chemical process. Despite voluminous reports on biological synthesis of silver nano particles, there is still a challenge to develop fast syn thesis of nanoparticles in the range of minutes/seconds through biological ro…