俄罗斯厨房与浴室家具市场调查报告（二）

本刊2006年第8期(P13～17)刊登了调查报告的第—部分,在读者中产生了一定的反响。现将该报告第二部分刊登如下,以飨读者。     

弹性介质中框架结构的有限元计算分析(英文)

文章提出了一种考虑剪切变形,由经典弯杆理论发展形成的在弹性介质中框架结构的有限元计算方法.     

Internal oxidation thermodynamics and microstructures of Ag-Y alloy

The thermodynamic data of pure Ag and Y were calculated. The phase constitution, composition of micro-region and microstructures of Ag-Y alloy after internal oxidation were investigated by X-ray diffractometry(XRD), energy dispersion spectrometry(EDS) and scanning electron microscopy(SEM). The results show that the internal oxidation behavior of Ag-Y alloy is feasible from the view of thermodynamics. The upper limit of oxygen partial pressure of Ag-Y alloy oxidation is a function of temperature. Two phases (Ag and Y2O3) appear in Ag-Y alloy after the internal oxidation. The surface of Ag-Y alloy is convex because of the volume expansion of oxide in the alloy and the composition of the convex part is Ag. In Ag-Y2O3 sintered bulk Y2O3 particles are distributed inhomogeneously and conglomerated seriously, but they are dispersed uniformly in the Ag matrix after severe plastic deformation.     

微量Sc元素对AZ91镁合金组织性能的影响

本试验以AZ91镁合金为基,制备了含Sc的AZ91镁合金.研究了微量Sc对AZ91镁合金组织性能的影响.结果表明,Sc的加入,在AZ91中形成了Al3Sc新相;细化了AZ91合金的铸态组织,改变了第二相Mg17Al12的形貌;显著提高了材料的硬度、强度;抑制了材料的动态再结晶,且延缓了材料的时效硬化行为.     

Hot compression deformation behavior of MB26 magnesium alloy

The flow stress features of MB26 magnesium alloy were studied by isothermal compression at 300-450 ℃ and strain rate of 0.001^-1 s J with Gleeble 1500 thermal simulator. In addition, the deformation activation energy Q was calculated. The results show that the strain rate and deformation temperature have obvious effect on the true stress. The peak value of flow stress becomes larger with increasing strain rate at the same temperature, and gets smaller with the increasing deformation temperature at the same strain rate. The alloy shows partial dynamic recrystallization. The flow stress of MB26 magnesium alloy during high temperature deformation can be represented by Zener-Hollomon parameter including the Arrhemius term. The temperatt, re range of 350-400℃ is suggested for hot-forming of this alloy.     

基于多标记与半监督学习的入侵检测方法研究

机器学习所关注的问题是系统如何随着经验积累自动提高分类性能,这与入侵检测通过对外界入侵进行自我学习来提高其检测率和降低误报率是一致的。因此把机器学习的理论和方法引入到入侵检测中已成为一种有效方案。文中结合多标记与半监督学习理论,将ML-KNN算法应用于入侵检测系统。在KDD CUP99数据集上的仿真结果表明,该方法在入侵检测中能获得高检测率和低误报率。     

IPTV测试仪网络层测试的设计与实现

以IPTV测试仪的网络层测试功能为研究背景,介绍了IPTV的整体设计框架、网络层测试指标的算法设计,并在此基础上探讨了利用IP流量发生器测试这些指标的设计方案。分析了方案中先进的主从机模式和高效的流量产生算法及调度算法,给出了测试方案的仿真结果。结果表明,方案思路清晰、稳定可靠。此方案已应用于IPTV测试仪中,效果良好。     

乙酸酐改性氨基聚硅氧烷的成膜性及膜形貌研究

应用原子力显微镜（AFM）和接触角测量仪对乙酸酐改性氨基聚硅氧烷的成膜性及膜形态进行了研究。结果发现，氨基聚硅氧烷在单晶硅基底上均能成膜，但不同的氨基聚硅氧烷所形成的膜形貌不同，膜的表面形貌实际上与基团的排列方式有关，氨乙基氨丙基聚二甲基硅氧烷在单晶硅基底上可形成均匀、平薹、光滑的疏水膜，而乙酸酐改性的氨乙基氨丙基聚二甲基硅氧烷则形成凹凸不平、粗糙的具有弱亲水性的非均匀膜。     

柘城地区浅层地下水化学类型与高氟水成因分析

以柘城地区浅层地下水化学特征及水中氟离子质量浓度为研究对象,开展地形地貌、水文地质及环境地质调查、水样测试等工作,分析研究区地下水化学类型、气象、岩性、水化学成分。结果表明,岩石、土壤是研究区高氟地下水形成的主要因素,同时气候、地貌和水文地质条件也对研究区高氟地下水的形成产生影响。