Materials Literature
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Microstractural changes in 1050 aluminum alloy sheets were observed on the same area in a specimen with SEM-EBSD system. Specimens were heat-treated at 823 K for 3.6 ks. The specimen was cold-rolled at a reduction rate of 75% and then annealed at 623 K. Intermittent annealing using a salt bath, Ar ion-polishing and EB…
Monocentric lenses (MC) enable panoramic high-resolution imaging, but have not been fully explored. We present algorithms for systematic optimization of monocentric objectives, and show the tradeoff between lens complexity and focal length, numerical aperture and spectral bandwidth.
We have found that the luminescence spectrum of 2-(2'-hydroxyphenyl)benzoxazole in its solid state includes only a band with a large Stokes shift assigned to a keto structure.Our quantum chemical calculations of the electronic structure of the molecule have demonstrated that restriction of the internal rotation increa…
The chemical shift of the 3d5/2 line of several cesium compounds were measured under the same condition by X-ray photoelectron spectroscopy. With the Auger line (M4N45N45) , the figure of chemical state plot (Wager plot) of the cesium compounds was drawn. When many materials are developed for decontamination of radioa…
70-year old female patient with metastases mammary carcinoma on left, initial diagnosis in May 2008, has been detected. Further diagnosis was arterial hypertension and obesity (97 kg, 161 cm).
In coastal regions of Antarctica, primary production is a result of the interaction between four communities: cryophilic microalgae, phytoplankton, microphytobenthos and macroalgae. Microphytobenthos can be equally important to eponthic microbiota, or even hold the bulk of primary production in periods a er the ice me…
Московский государственный технический университет им
BACKGROUND: Unique properties of engineered nanomaterials (ENMs) and products made of them have contributed to a rapid progress in the production and application of ENMs in different branches of industry and in factories with different production scale. Bearing in mind that nano-objects (nanoplates, nanofibres, nanopa…
Transparent conducting Zinc Oxide (ZnO) thin films with an average thickness of 130.5nm were deposited on glass substrate at room temperature by RF sputtering technique. The samples were then annealed under nitrogen atmosphere at 423K, 573K and 723K respectively. The structural and electrical properties of the films w…
ABSTRACTIn the fields of an eco-friendly automobile, an advanced industrial machine, and a precision electronic device, controlling of vibrational behavior of the sintering parts obtained from powder metallurgy is required. In this paper, the vibration behavior of porous material made by powder metallurgy is investiga…
摘要： 针对在广义刚度场中研究结合部对机床动态特性的影响以及动力学参数优化设计的需要，提出一种基于机床广义动态信息模型的结合部动刚度参与因子的概念和辨识计算方法。采用响应面方法(Response surface methodology, RSM)建立描述广义刚度场中机床轴端动刚度与结合部动力学参数关系的广义动态信息模型；以结合部动刚度单位变化值为广义动态信息模型的输入量，计算轴端动刚度变化值作为结合部动刚度参与因子的辨识依据。以精密卧式加工中心为对象，将该方法应用于立柱-主轴系统的导轨、滚珠丝杠结合部动刚度参与因子辨识和试验验证。结果表明，该方法可以有效地识别出对机床动态特性影响较大的关键结合部，从而为结合部动力学参数的定量优化设…
For the phase and microstructure selection during directional solidification of peritectic alloys,the solute distribution ahead of the solid-liquid interface plays a fundamental role.To study the solute distribution under convection condition,the convection factor(Δ) was introduced into the boundary layer model and Bo…
TiO2 nanocrystals of the anatase, rutile, and brookite polymorphs have all been selectively synthesized via oxidation of titanium trichloride under proper conditions. The results showed that phase selection is largely controlled by reaction kinetics, and is influenced by solution pH and solute concentration. Morpholog…
This study examined the mechanical properties of aligned multi-walled carbon nanotube (CNT)/epoxy composites processed using a hot-melt prepreg method. Vertically aligned ultra-long CNT arrays (forest) were synthesized using chemical vapor deposition with high growth rate, and were converted to horizontally aligned CN…
高圧ホモジナイザーで微粒化したpoly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS)分散液を用いてアルミ固体電解コンデンサを作製し，等価直列抵抗(ESR)と静電容量(Cap)について詳細に検討した．高圧ホモジナイザーの圧力を154 MPaまで上昇させるとコロイド平均粒子径は625 nmから5 nmに低下し，120 HzにおけるCapは9 µF/cm2から63 µF/cm2に増加した．一方，エチレングリコール(EG)の添加により，電気伝導度は0.02 S/cmから163 S/cm まで向上し，コンデンサのESRが顕著に低下した．さらに，分散液の微粒化…
We have prepared double perovskite La2CoMnO6 (LCMO) polycrystalline nanoparticles with different particle sizes (from 28 to 285 nm) by sol-gel method. Reitveld refinement of obtained XRD data illustrates crystal structural changes from pseudo tetragonal to ordered monoclinic phase with the increase of particle size. T…
Using one known series, we can structure several new series of reciprocals of binominal coefficients by splitting items. These denominators of series contains different the multiplication of one to five odd factors and binominal coefficients. And some identities of series of numbers values of reciprocals of binominal…
一般的にプリント配線板の絶縁材と導体間の密着強度が発現するメカニズムは，銅箔のマット面形状，または樹脂表面の粗化によって形成される凹凸を利用した投錨効果，およびファンデルワース力，水素結合で得ている。しかしながら，凹凸の存在により，高精細パターンの形成を阻害し，表皮効果の影響による高周波の伝送ロスが拡大する弊害も多い。これらの課題を解決する方法として，樹脂と金属間などの異種材料間を化学結合により接合する分子接合技術を，ポリイミドフィルム上への直接メタラズに応用し，高性能，安価でイノベーティブな新規両面FPCを開発，製品化を実現した。新規FPCのピール強度は，初期で15 N/cm，150°C168 h，および260°C5 minの熱…
Generally, low backlash mechanisms are required for robot joints to perform tasks accurately. In this paper, we propose a new concept of a low backlash reducer using precessing crown gears. We call it the crown reducer. The features of this reducer are low backlash, high reduction ratio and ease of downsizing which we…
This paper describes a simple method using Fenton reagent for treating the wastewater from the preparation of polyaniline. The method employs the absorption of UV-visible spectroscopy as a quantitative indicator of the byproducts. Some factors e.g., reactive time, temperature, pH and the concentration of FeSO4·7H2O an…