复杂网络交叠团模糊分析与信息挖掘*

针对复杂网络交叠团的聚类与模糊分析方法设计问题,给出一种新的模糊度量及相应的模糊聚类方法,并以新度量为基础,设计出两种挖掘网络模糊拓扑特征的新指标：团间连接紧密程度和模糊点对交叠团的连接贡献度,并将其用于网络交叠模块拓扑结构宏观分析和团间关键点提取。实验结果表明,使用该聚类与分析方法不仅可以获得模糊团结构,而且能够揭示出新的网络特征。该方法为复杂网络聚类后分析提供了新的视角。     

一种Ti-6Al-2Zr-1Mo-1V合金锻件的宏观与微观组织特征分析

研究了Ti-6Al-2Zr-1Mo-1V合金环锻件的宏观和微观组织，分析了锻件的变形和热处理工艺。对Ti-6Al-2Zr-1Mo-1V合金环锻件采用了β→α β温度区域的热变形工艺，即在卢区温度下开始变形，α β区温度下结束变形，锻件的退火温度略低于β相的临界分解温度了TK；采用β→α β温度区域热变形的锻件具有中等强度水平，良好的室温冲击性能和高温蠕变、持久性能；β→α β温度区域的变形工艺具有简化变形工序、降低变形抗力的优点，但变形时间的控制较难掌握，需一定的实践探索。     

复相添加剂／3Y-TZP复合增韧氧化铝陶瓷的研究

利用复相添加剂和3Y-TZP的叠加作用，对氧化铝陶瓷的增韧机制和途径进行了研究。结果表明：复相添加剂有助于Al2O3／3Y-TZP复合材料中氧化铝晶粒的异向生长，其增韧效果与3Y-TZP产生了叠加效应。实验材料密度接近理论密度；抗弯强度556．35MPa；断裂韧性6．73MPa．m^1/2；综合力学性能明显提高。     

Φ180mm连铸坯轧制无缝管内折缺陷调查

通过对连铸工艺的试验研究，基本弄清了２０Φ１８０ｍｍ连铸圆坯轧制无缝管产生内折缺陷炼钢工艺方面的原因。     

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针对莱钢转炉生产的优质碳素和合金结构钢的主要评价指标顶锻和低倍合格率较低的现状,结合产品检验和生产实践,设计了专门的试验对引发产品质量缺陷的主要表现形式顶锻裂纹、低倍裂纹和夹渣等进行了探索与研究,并且利用低倍组织分析、电化学萃取分析等手段,对铸坯和产品的质量缺陷进行了客观的分析,在分析与研究的基础上,结合生产工艺执行,从冶炼、连铸、产品抽查与检验等各方面采取了针对工艺改进措施,有效的提升了转炉优质钢的产品质量。     

连铸坯轧制钢轨低倍组织特征研究

本文主要对包钢连铸坯轧制钢轨低倍组织结构作了初步的讨论分析，并与模铸锭轧帛钢轨低倍组织结构进行了比较，此外还简要介绍了自生产以来，连铸坯轧制中易出现的有害缺陷。     

Estimating the quality of metal in cast working blades made of the nickel alloy ChS88U-VI

Results are presented from a study of the metal in the working blades for a gas turbine power system made of the nickel alloy ChS88U-VI in its initial heat treated state. It is found that cooled working blades in the first and second stages meet the engineering requirements, while large uncooled blades in the third and fourth stages deviate from the specifications for a turbine system in terms of their macrostructure and mechanical properties. Translated from élektricheskie Stantsii, January 2009, No. 1, pp. 28–34.     

连铸方坯轧制方圆钢劈头缺陷研究

通过现场跟踪试验,找出了连铸方坯轧制方圆钢产生劈头缺陷的原因,并利用低倍检验确定了合理头尾切除长度,通过现场实践,效果显著,有效解决了连铸方坯轧制方圆钢劈头缺陷问题.     

Dental ceramic prostheses by stereolithography-based additive manufacturing: potentials and challenges

ABSTRACT

The current method for making dental ceramic prostheses in a subtractive manner causes a severe waste of materials while requires excessive manual works that bring in the uncertainty for control of quality. The rapid development and commercialisation of additive manufacturing (AM) has aroused interest and wonders both in material and dental communities about their potentials and challenges in fabricating of ceramic prostheses in a materials-saving manner. In this work, AM approach was applied to fabricate the dental bridges and implants made of zirconia. The achieved geometries and dimensional accuracy are used to demonstrate the potential of this technique in fabricating of dental ceramic prostheses, whereas the observed macro and micro defects formed during the treatment process is used to reveal the challenges facing in order to adapt this technology into real dental practice. Suggestions are provided for future development of the technology, particularly on minimising the processing defects.     

波阻抗反演在高精度地震勘探中的应用

煤层厚度解释一直以来是地震勘探的难点。本文从反演理论入手结合三维勘探区反演实例,分析了不同地区反演的效果,直观地反映了煤厚的变化,结合钻孔资料分析煤层宏观结构变化,为地质判层提供了充足的依据,获得了信噪比较高的地震资料和丰富的地质成果,达到了预期的效果。