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2012 7th International Forum on Strategic Technology (IFOST)最新文献

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Determination of overlapping peaks heights by tangent method 切线法确定重叠峰高度
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357742
E. Larionova, S. Romanenko
In this work the tangent approach is valid on example of overlapping voltammetric peaks of Cd (II) and Tl (I) at their different concentration in a mixture. Height of the frame plotted by inflectional tangents to the inflection points on peak branches is used as a peak maximum for calibration curve plotting. It is founded that systematic errors are not significant for the measurement of Tl (I) peak. In case of the Cd (II) peak the significant systematic error arising from tailing of the ascending part of Tl (I) peak is observed. We propose a method of systematic errors compensation. Systematic errors are estimated by peak series modeling. We use six parametric peak model with help of a priory information about signal shape and real values of resolution criteria and ratios of peaks heights. Peak shape is determined by difference method and ratios of peak heights by calibration curve.
在本研究中,切线法对于Cd (II)和Tl (I)在不同浓度混合物中伏安峰重叠的例子是有效的。用弯曲切线与峰值分支上的拐点绘制的帧的高度作为峰值最大值来绘制校准曲线。发现系统误差对Tl (I)峰的测量不显著。对于Cd (II)峰,观察到Tl (I)峰上升部分的尾迹引起了显著的系统误差。提出了一种系统误差补偿方法。采用峰值序列模型估计系统误差。利用信号形状的先验信息、分辨率准则的实值和峰高比,采用六参数峰模型。峰形由差值法确定,峰高比值由标定曲线确定。
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引用次数: 3
Solid oxide fuel cell on porous Ni-Al support 多孔镍铝支架上的固体氧化物燃料电池
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357676
A. Soloviev, N. Sochugov, I. Ionov, A. Kirdyashkin, V. Kitler, A. Maznoy, T. Sigfusson
The results of the manufacture and research of metal-supported solid oxide fuel cells are presented. As a metal support the porous Ni-Al plates manufactured by self-propagating high temperature synthesis were used. The effect of synthesis conditions and composition of green mixture on the phase composition, microstructure, porosity, gas permeability and other properties of the Ni-Al samples were investigated. Solid oxide fuel cells with the structure of “Ni-ZrO2:Y2O3 anode” / “ZrO2:Y2O3 electrolyte” / “La0.8Mn0.2SrO3 cathode” were formed on the surface of porous Ni-Al supports by the methods of high-temperature sintering and magnetron sputtering. Power density of a fuel cell on a metallic support reaches 400 mW/cm2 at 800°C when humid H2 was used as fuel and air was used as an oxidant.
介绍了金属支撑固体氧化物燃料电池的制造和研究成果。采用高温自蔓延合成法制备多孔镍铝板作为支撑材料。研究了绿色混合料的合成条件和组成对Ni-Al样品的相组成、微观结构、孔隙率、透气性等性能的影响。采用高温烧结和磁控溅射的方法,在多孔Ni-Al载体表面制备了“Ni-ZrO2:Y2O3阳极”/“ZrO2:Y2O3电解质”/“La0.8Mn0.2SrO3阴极”结构的固体氧化物燃料电池。以湿气H2为燃料,空气为氧化剂,在800℃条件下,金属支架上的燃料电池功率密度可达400 mW/cm2。
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引用次数: 2
Morphological features of the condensed combustion products of burning system "nanoaluminium-air" “纳米铝-空气”燃烧体系凝聚燃烧产物的形态特征
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357531
E. Popenko, Y. Pautova, E. Chaplina, A. Gromov
The mechanism of whisker crystals formation process by aluminum aerogels burning was studied adapting for ceramic technology problems solution. The correlation of aluminum aerogels burning characteristics and the final combustion products structure was found. The burning temperature, air pressure and nitrogen concentration are significantly effect on the crystals growth mechanism. A wide variety of the crystal morphology in condensed combustion products was found depended on experimental condition.
针对陶瓷工艺问题的解决,研究了铝气凝胶燃烧形成晶须的机理。发现了铝气凝胶燃烧特性与最终燃烧产物结构的相关性。燃烧温度、气压和氮浓度对晶体生长机制有显著影响。在不同的实验条件下,缩合燃烧产物的晶体形态变化很大。
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引用次数: 0
Engineering support for improving quality of layer-by-layer laser sintering 提高激光逐层烧结质量的工程支持
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357719
A. Saprykin, N. Saprykina
Quality improvement problem has been considered for a laser sintered surface layer. Purposely built experimental setup was decribed together with a four-factor experiment design on laser sintering PMS-1 copper powder. A mathematical model describing the effect of laser sintering process parameters on the surface roughness has been proposed. Practical recommendation for improving the quality of the surface layer is given.
研究了激光烧结面层的质量改进问题。介绍了激光烧结PMS-1铜粉的实验装置和四因素实验设计。提出了激光烧结工艺参数对表面粗糙度影响的数学模型。提出了提高表面层质量的实用建议。
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引用次数: 10
Research on reliability of main scheme of 110, 220 kV outdoor switchgear power plant №4's 110、220千伏4号室外开关柜电站主方案可靠性研究
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357690
D. Sodnomdorj, N. Enkhmunkh
In this paper to determine the reliable operation of main characteristics of power plant No4's outdoor switchgear main scheme method is produced. Also the reliable operation of power plant No4's 110, 220 kV-s main scheme of element's are researched and the all variants of commutation in operation is make and reliability research is done. And characteristics of reliable operations are determined.
本文提出了确定4号电厂室外开关柜主要特性可靠运行的主方案方法。研究了4号电厂110、220 kv主元件的可靠运行方案,制定了运行中的各种换向变型,并进行了可靠性研究。确定了可靠运行的特点。
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引用次数: 0
Thermal degradation of polyethylene/layered double hydroxides nanocomposites 聚乙烯/层状双氢氧化物纳米复合材料的热降解
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357536
Wang Yue, Jiang Li, Cui Bingbing, Lai Wenwei, Han Zhidong
Mg-Al layered double hydroxide (LDH) was modified with sodium dodecyl sulfate (SDS) by regeneration method. Polyethylene/modified LDH composites (PE/SDS-LDH) were prepared by melt blending and solution mixing method. Maleated polyethylene (PEgMA) was used to improve the compatibility between LDH and PE. The dispersion of LDHs in PE matrix was investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). Thermal degradation of PE/SDS-LDH composites was characterized by thermogravimetric analysis (TGA). The results reveal that PE/PEgMA/SDS-LDHs microcomposites were obtained by melt blending method and PE/PEgMA/SDS-LDHs nanocomposites were prepared by melt blending PE with SDS-LDH/PEgMA master-batch obtained by solution mixing. Due to the thermal decomposition of LDHs at much lower temperature than PE, the degradation of composites begins at low temperature regardless of the dispersion of LDH in PE. The initial degradation temperature corresponding to 5% weight loss of nanocomposites is higher than that of microcomposites. Compared with microcomposites, the nanocomposites present the higher temperature corresponding to the maximum thermal degradation rate and more residues at the end of thermal degradation, indicating the better barrier properties and charring effects of nano-dispersed LDH.
用十二烷基硫酸钠(SDS)对镁铝层状双氢氧化物(LDH)进行再生改性。采用熔融共混和溶液混合法制备了聚乙烯/改性LDH复合材料(PE/SDS-LDH)。采用马来化聚乙烯(PEgMA)改善LDH与PE的相容性。采用x射线衍射仪(XRD)和扫描电镜(SEM)研究了LDHs在PE基体中的分散。采用热重分析(TGA)对PE/SDS-LDH复合材料的热降解进行了表征。结果表明:采用熔融共混法制备PE/PEgMA/SDS-LDHs微复合材料;采用熔融共混法制备PE/PEgMA/SDS-LDHs纳米复合材料;由于LDH的热分解温度远低于PE,因此无论LDH在PE中的分散程度如何,复合材料的降解都是从低温开始的。纳米复合材料失重5%时的初始降解温度高于微复合材料。与微复合材料相比,纳米复合材料最大热降解速率对应的温度更高,热降解结束时残留物更多,表明纳米分散LDH具有更好的阻隔性能和炭化效果。
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引用次数: 0
Decoding algorithm for interference patterns in phase shifting interferometry without a priori shift knowledge 无先验移位知识的相移干涉测量中干涉图样的解码算法
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357647
V. Guzhov, S. Ilinykh, D. Haydukov, R. A. Kuznetzov
Interferogram's decoding methods based on the step-by-step shift are widely used in creation of interference measuring systems. The phase-shifting method is based on obtaining several interferograms when the phase of reference wave is changed to known values. Accuracy of existing decoding algorithms depends on a setting of values of inserted phase shifts. However, it is difficult to determine an exact value of the phase shift in practice because of errors of devices performing a phase shift. In this paper an algorithm based on the step phase-shifting without a priori knowledge of phase shift is considered. This algorithm uses three interferograms obtained with arbitrary phase shifts.
基于分步偏移的干涉图解码方法广泛应用于干涉测量系统的创建。移相法是将参考波的相位改变为已知值时,获得若干干涉图的方法。现有解码算法的精度取决于插入相移值的设置。然而,在实际中,由于进行相移的器件存在误差,很难确定相移的精确值。本文研究了一种不需要先验相移知识的阶跃相移算法。该算法使用任意相移的三幅干涉图。
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引用次数: 3
Parameters estimator of GARCH(1, 1) process with heavy tailed errors 具有重尾误差的GARCH(1,1)过程参数估计
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357606
Hailong Chen, Chengji You, Deyun Chen
This paper studies a modification of quasi-maximum likelihood estimator for GARCH (1, 1) process with the errors, whose squares have regularly varying tail probabilities with the exponent α, α >; 0. We showed that, this estimator is unbiased and asymptotically normal with standard convergence rate of n1/2 regardless of whether the errors are heavy-tailed.
本文研究了GARCH(1,1)过程的拟极大似然估计的一种修正,该过程的平方尾部概率随指数α, α >有规则变化;0. 我们证明,无论误差是否为重尾,该估计量都是无偏和渐近正态的,其标准收敛速率为n /2。
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引用次数: 2
Nanosecond optical parametric oscillator in the mid IR range with a two-pass pumping is based on the crystal AgGaS2 基于AgGaS2晶体的中红外两通泵浦纳秒光学参量振荡器
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357790
Dmitry Kolker, Alexander Karapuzikov, A. Karapuzikov, M. Starikova, Andrey Boyko, N. Dukhovnikova, Anatoly Osokin
The optical parametric oscillator based on the bulk crystal AgGaS2 with a two-pass pumping is created. Optical parametric oscillator pumped by the fixed wavelength 1.053 μm a compact nanosecond Nd:YAG laser. Pulse duration is 5-7 ns, a maximum pulse energy was 500 μJ at a frequency of 1-7 kHz. Lasing threshold from 12 to 20 mJ were obtained using an AgGaS2 crystal.
基于本体晶体AgGaS2制备了两路泵浦的光学参量振荡器。由固定波长1.053 μm的紧凑纳秒Nd:YAG激光器泵浦的光参量振荡器。脉冲持续时间为5 ~ 7ns,频率为1 ~ 7khz,最大脉冲能量为500 μJ。利用AgGaS2晶体获得了12 ~ 20 mJ的激光阈值。
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引用次数: 1
Processing of high frequency data with risk aversion 规避风险的高频数据处理
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357629
O. Kritski
This paper suggests the calculation methodology of univariate and multivariate absolute risk aversion based on asymptotic analysis of conditional expectation and future excess return variance. In the paper we provide modification of the multivariate econometric algorithm on the assumption of weakly time-varying correlation matrices for which the conditions of positive definiteness were received. We prove theorems on relation between risk aversion of shares and futures. Next, concerning risk aversion of various financial instruments with common underlying asset, we defined a time-varying stochastic no-arbitrage interest rate used in Black-Cox credit risk model.
本文提出了基于条件期望和未来超额收益方差渐近分析的单变量和多变量绝对风险厌恶的计算方法。本文在弱时变相关矩阵的假设下,给出了多元计量算法的修正,该算法具有正确定性条件。我们证明了股票风险厌恶与期货之间关系的定理。其次,针对具有共同标的资产的各种金融工具的风险厌恶,我们定义了一个用于Black-Cox信用风险模型的时变随机无套利利率。
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引用次数: 2
期刊
2012 7th International Forum on Strategic Technology (IFOST)
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