炉顶布料方式对高炉长寿的影响

分析了高炉长寿与炉顶布料的关系，中心加焦可促进中心气流发展，减轻煤气对炉墙的冲刷；环布碎焦可有效隔热且避免矿石粘结墙，使炉墙免侵蚀并消除吉厚，结瘤，采用此二项技术可使高炉长寿，热损失减少故亦有利节能。     

混沌运动的分析及判断

本文总结了混沌运动的特点及判断浑沌运动的几种方法，这些方法是分析混沌运动和其它非线性现象的重要方法。     

非晶FeSiBCu合金系的磁后效

研究了非晶ＦｅＳｉＢＣｕ合金系的磁后效，结果表明淬态Ｆｅ基非晶合金的磁后效主要来自磁致伸缩相互作用，然而还发现磁后效和感生磁各向异性对Ｃｕ含量有类似的依赖关系，这显示还应考虑感生磁各向异性磁后效的影响。     

次酉矩阵及次酉变换

本文在酉空间中引进了次酉矩阵和次酉变换，推广了酉矩阵和酉变换的定义，并得到一些结果，这些结果推广了文[4]中的相应定理。     

贺兰山蓝丝膜菌菌丝体生长特性的研究

对贺兰山蓝丝膜菌（Ｃｏｒｔｉｎａｒｉｕｓｃａｅｒｕｌｅｓｃｅｎｓ（Ｓｃｈａｅｆ．）Ｆｒ．）菌丝体在纯培养条件下的生长特性进行了研究．结果表明,菌丝体最适生长温度为２０～２５℃,最适生长ｐＨ值为６,长势最好的培养基为ＰＤＡ综合培养基,蛋白胨、葡萄糖为最佳氮碳源     

基于特征层和二代曲波变换的多模生物特征融合识别方法

针对单模生物特征识别方法在实际应用中存在识别正确率较低的问题,提出了一种基于特征层和二代曲波变换的单样本多模生物特征融合识别方法,其采用了2种生物特征:掌纹特征和人脸特征.将所有归一化后的学习样本图像和测试图像通过组合的快速离散曲波变换和小波变换进行分解.系数经组合和规范化处理后,在特征层实现融合,融合后的特征参数送入K-最近邻分类器进行分类,从而获得最终识别结果.在香港理工大学掌纹数据库和Ljubljana大学人脸数据库上的实验结果表明,所提方法在每个类别仅使用1个学习样本的情况下,其生物特征图像的最佳平均识别正确率达到92.40%,比单模人脸、单模掌纹识别方法的识别率分别提高了35.38%和8.92%.     

Influence of chemical liquids on the fatigue crack growth of the AZ31 magnesium alloy

The fatigue crack growth behavior of an AZ31 magnesium alloy was investigated by comparing the effect of zirconate and phosphate chemical liquids. The morphology, components, and phase compositions of the chemical depositions at the fatigue crack tip were analyzed by employing scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD), respectively. For samples with and without the chemical liquids, their stress-intensity factor values at the fatigue crack tip were compared by using a stress-strain gauge. The results demonstrated that a zirconate film (Zr_xO_y·Zn_xO_y) and a phosphate film (Zn₃(PO₄)₂·4H₂O and MgZnP₂O₇) could be formed on the fatigue crack-surface at the fatigue crack tip. The stress distribution was changed because of the chemical depositions and the causticity of the chemical liquids. This could decrease the stress-intensity factor value and thus effectively cause fatigue crack closure, which reduces the fatigue crack growth rate. Moreover, it was found that the fatigue crack closure effect of zirconates was more positive than that of phosphates.     

电磁波在等离子体中的衰减特性

从理论上研究了不同密度下大气压等离子体中正负离子、电子对电磁波衰减的影响,对电磁波的吸收、反射和透射功率特性进行了分析.结果表明,在大气压条件下,当正负离子浓度超过电子浓度的1×104倍以上时,正负离子对电磁波在等离子体中衰减特性的影响非常显著,同时给出了电磁波在等离子体中的吸收峰值和带宽,所得结果为用于隐身目的的等离子体参量的选择提供了重要依据.     

Trends of the precipitation acidity over China during 1992–2006

The trends of the precipitation acidity from 1992 to 2006 were studied, based on the long-term acid rain observations at 74 sites in China. The results show that there was no remarkable change or extension of acid rain area (i.e., with annual mean of precipitation pH<5.6) during the 15 years. The largest and continuous acid rain area exists in the south of the Yangtze River, while the acid rain areas north of the Yangtze River remain separate. The severe acid rain area (i.e., with annual mean of precipitation pH<4.5) exists mainly in the south of the Yangtze River. The overall precipitation acidity for the 74 stations showed different trends before 1999 and after 2000. In the period 1992–1999, the precipitation acidity at most of the sites remained steady or showed a decreasing trend. After 2000, however, an increasing trend of the precipitation acidity was observed at many sites in North China, Central China, East China, and South China. As a result, the pattern of acid rain area changed during 1992–2006. The precipitation over North China, Central China, and South China became more acidified in the 15 years, with more pronounced trends in North China and the north of Central China. A slight decrease in the precipitation acidity was found in Southwest China, an area characterized as severest acid rain area for about two decades after the early 1980s. Consequently, the center of severe acid rain area in the south of the Yangtze River moved eastwards. The non-hydrogen conductivity (NHC), which is defined as the difference between the measured precipitation conductivity and the H+ conductivity calculated from measured pH, was estimated and treated as a proxy of soluble ions in precipitation. The result shows that the overall trend of the NHC before 1999 was pronounced and positive, while the trend after 2000 was inconspicuous or slightly negative. During 2000–2006, the change rate of pH was positively correlated to that of the NHC at 21 sites, implying that the increasing acidities found at these sites may partly be attributed to the decrease in the concentration of airborne particulate matter in recent years.     

产品定制设计中人-机-环境的可靠性的设计方法研究

可靠性设计是产品设计人-机-环境系统中的重要部分,它关系到产品设计的品质。研究产品可靠性的设计是提升产品质量性能的有效途径。以实验为手段,通过数学模型分析并总结了产品定制设计中影响可靠性的因素及可靠性设计的方法。用产品定制设计实例论证可靠性设计方法的可行性。