基于运动自适应的非均匀比率图像扩展算法

讨论了传统的4：3格式的标准清晰度电视信号转换为16：9格式的高清晰度电视信号的运动自适应的非均匀比率扩展变换算法，算法结合视频图像的运动检测，采用K－均值聚类法，根据图像的运动重心（motion center of gravity-MCOG)选择合适的扩展比率，并针对不同的图像区域进行扩展变换，算法符合人的视觉系统对图像的运动区域具有较强感知度的视觉特性，有效的减小了视频格式转换的图像变形，实验表明了本文提出算法的有效性。     

Irreversible Colossal Magnetoresistance in La0.58Dy0.09Ca0.33MnO3

The representative sample La0.58Dy0.09Ca0.33MnO3 of Dy doped La0.67Ca0.33MnO3 rare-earth manganites was investigated.The most important effect of Dy doping is to introducethe magnetoimpurity and form the spin clusters which induce dramatically large CMR in Lao.58Dyo.09Cao.33MnO3. The fitting results of field-induced resistivity decrease to the Brillouin function indicate that the CMR is caused by the spin dependent hopping between spin clusters. It is the magnetic field that reduces the size of spin clusters and induces a field-induced irreversible CMR behaviour.     

通信网抗干扰性能的灰色聚类分析

运用灰色系统理论对通信网的抗干扰性能进行综合分析，克服了传统方法只能从原理上进行定性分析的缺点。介绍了灰色聚类的基本概念及其模型，给出了对通信网抗干扰性能进行评估的指标体系，并确定了相应的灰类白化函数。最后通过具体实例分析了模型的工作过程。     

Heterogeneity of V2O5(010) surfaces – the role of alkali metal dopants

Any solid oxide-originated catalyst is extremely heterogeneous due to several factors. First, it may consist of various phases, each exposing different surfaces characterized by different electronic, and thus catalytic, properties. However, even a particular surface of a chosen phase is heterogeneous as it consists of different chemical elements connected in polyhedra bonded with each other via corners and/or edges and/or walls. In addition, dopants and supports change properties of the surface by enriching its heterogeneity. In the following, the role of dopants as potential sources of surface heterogeneity is discussed, using vanadia as an example.     

First-principles calculations of phase equilibria and transformation dynamics of Fe-based alloys

Theoretical procedures of first-principles calculations of phase stability and phase equilibria are summarized. The present scheme is shown to be able to reproduce the transition temperatures with surprisingly high accuracy for Fe−Pd and Fe−Pt systems. The main emphasis of the present report is placed on the extension of the first-principles calculation to transition dynamics calculations. This is performed by combining the cluster variation method with the phase-field method via a coarse graining operation. The time evolution process of antiphase boundaries associated with L1₀ ordering for Fe−Pd system is demonstrated. This paper was presented at the International Symposium on User Aspects of Phase Diagrams, Materials Solutions Conference and Exposition, Columbus, Ohio, 18–20 October, 2004.     

Fractal and percolation properties of active layer structure at oxygen electrode based on nanocomposite material of dispersed carbon carrier/laccase

The properties of the oxygen electrode active layer with laccase immobilized on highly dispersed colloid graphite (HCG) or carbon black AD 100 are studied. It was assumed that such a composite material provides the optimum conditions for bioelectrocatalytic oxygen reduction and allows enhancing the measured current values referred to the electrode geometric surface. These expectations were not wholly justified: the employment of HCG as a carrier allowed enhancing the specific activity per laccase molecule up to 29.8 μA/pmol of the enzyme, which is five times higher than the specific activity of laccase applied to AD 100 (5.9 μA/pmol of the enzyme); however no success was achieved in forming the active layers of any considerable thickness both in the first and in the second case, as the activity decreased drastically at the increase of the layer thickness. The nature of these problems can be caused by a number of reasons: the physico-chemical and structural characteristics of the carbon materials determining, in their turn, the adsorption value and the orientation of the enzyme molecules towards the carrier and the regularities of the active layer structure consisting of the fractal clusters of carbon particles. With the help of computer modeling, the fractal and percolation properties of the active layer structure are studied. The models of the active layer structure are suggested, in which carbon particles form agglomerates of fractal cluster type. This allows to suggest a number of considerations that can help to explain the fractal and percolation effects and the effect of the carbon carrier particle size on the immobilized enzyme coverage.     

Barriers to energy efficiency in small industry clusters: Multi-criteria-based prioritization using the analytic hierarchy process

The small scale industry (SSI) is an important component of Indian economy and a majority of SSI units tend to exist in geographical clusters. Energy efficiency is crucial for the survival and growth of energy intensive SSI clusters, not only to improve their competitiveness through cost reduction but also to minimize adverse environmental impacts. However, this is easier said than done due to the presence of a variety of barriers. The identification of relevant barriers and their appropriate prioritization in such clusters is a prerequisite to effectively tackle them. This paper identifies relevant barriers to energy efficiency and their dimensions in SSI clusters. Further, the barriers are prioritized based on the perceptions and experiences of entrepreneurs, the main stakeholders of SSIs, using the analytic hierarchy process (AHP). The field data from two energy intensive clusters of foundry and brick and tile in Karnataka (a state in India) reveal that the prioritization remained the same despite differences in the relative weights of barrier groups. The financial and economic barrier (FEB) and behavioural and personal barrier (BPB) have emerged as the top two impediments to energy efficiency improvements.     

分布式小卫星SAR回波仿真的并行化研究

分布式小卫星SAR系统回波仿真的计算量和存储量巨大,本文分析了回波仿真及其快速算法,提出了基于仿真时间分解和基于场景分解的两种并行任务分解方法;性能分析表明,前者能够显著提高算法的加速效率,后者在处理大尺寸场景时能有效克服内存不足的问题。最后,一组小型集群系统环境下的仿真实验数据证实了两种方法的可行性和有效性。     

基于MSTP/CWDM的远程容灾解决方案

文章分析了远程异地容灾的特点以及面临的问题,讨论了容灾中光纤通道储存区域网(FC SAN)技术以及服务器集群的使用,并且详细分析了如何利用多业务传送平台(MSTP)和粗波分复用(CWDM)技术来解决异地FC SAN存储子网之间的传输问题,最后提出了一套完整的、应用级别的远程容灾解决方案.     

鸡冠嘴铜金矿床Ⅰ号矿体群矿体地质特征及赋存规律

鸡冠嘴铜金矿床属典型的矽卡岩型铜金矿床。其Ⅰ号矿体群由Ⅰ0、Ⅰl、Ⅰ2、Ⅰ3 4个位于不同层位的次级矿体群组成。主矿体群Ⅰ2(包括Ⅰ201、Ⅰ202、Ⅰ203、Ⅰ204、Ⅰ205 5个矿体)中各个矿体其产状、形态各异。但都充分体现出了与接触带及顶板大理岩的相应性。顶板大理岩的组分特征及构造形态则是决定是否成矿的重要因素。