N重亏损系统摄动的原点移位组合近似方法

针对不完全特征向量系的黏性阻尼线性振动系统,提出了基于原点移位组合近似方法求解N重亏损系统重分析问题的快速算法。利用广义模态理论,在组合近似方法的基础上,通过引入原点移位参数求解摄动后的亏损系统,将广义特征向量表示成基向量和系数向量的组合形式,避开求解大规模方程组,简化了复杂的求解运算。数值算例表明,本文提出的算法高效、快速,并且有较好的精确性和稳定性。     

岁月沧桑话对联

对联是文学艺术宝库中璀璨的明珠。适用范围甚广。对联起源悠久,说法不一。从哲理层面看,中国哲学中有阴阳二元观念,所谓"太极生两仪",一阴一阳之谓道",把世界万事万物分为相互对称的阴阳两半,在思维本质上又相通,这是古代中国人世界观的基础。太极两仪生四象,春宵一刻值千金。无所不在对立统一的阴阳观念,成为一种民族的集体无意识,这些可谓对联发端的深层基础。楹联写作的核心问题是创造意境。对联是中国文化的一张名片,是诗中之诗,使楹联的普及与提高达到一个新阶段,上到一个新水平,是摆在我们面前的一个艰巨而光荣的任务。     

山东蓝宝石的色源和改色研究

报道了山东蓝宝石的ＸＰＳ，ＳＩＭＳ的测试结果，基于成份分析，光谱测试数据及对改色处理结果的分析，作出了关于山东蓝宝石的色源解释。山东蓝－宝石含铁量明显偏高，Ｆｅ＾２＋－Ｔｉ＾４＋离子间的电荷转移及Ｆｅ＾２＋，Ｆｅ＾２＋离子对的电子跃迁这两种机制的迭加，是造成其色深，失透的基本     

山洪灾害发生规律及成因研究

上世纪80年代以来,山洪灾害频繁发生,经济损失不断上升.分析表明黑龙江省山洪发生时空分布特征基本同全省暴雨分布相一致,山洪暴发前3 h、24 h及前10 d降雨量为有效     

水工混凝土结构裂缝成因挖掘的粗集方法研究

裂缝是水工混凝土结构常见病害之一,针对水工混凝土结构运行期的裂缝问题,应用粗集理论,结合实测资料,对裂缝产生的主要原因进行了系统地研究,提出了裂缝成因挖掘的粗集方法.     

Origin of Chinese ancient glasses—study on the earliest Chinese ancient glasses

The earliest Chinese ancient glasses before the West Han Dynasty (200 BC) from different regions are studied. The glass samples were unearthed from Hunan, Hubei, Yunnan, Sichuan, Guizhou, Guangdong and Xinjiang of China. The chemical composition of these glasses samples is analyzed by proton induced X-ray emission (PIXE) technique, energy dispersive X-ray fluorescence (EDXRF) method and inductively coupled plasma atomic emission spectrometry (ICP-AES). It is shown that the glass chemical compositions belong to barium-lead silicate BaO-PbO-SiO₂, potash soda lime silicate K₂O (Na₂O)-CaO-SiO₂ (K₂O/Na₂O>1), soda potash lime silicate Na₂O (K₂O)-CaO-SiO₂ (K₂O/Na₂O<1) and potash silicate K₂O-SiO₂ glass systems, respectively. The origins of the earliest Chinese ancient glasses are discussed from the archaeological and historical points of view. These four types of Chinese ancient glasses were all made in Chinese territory using local raw materials. The glass preparation technology was related to the Chinese ancient bronze metallurgy and proto-porcelain glaze technology. The glass technology relationship between the East and the West is analyzed at the same time.     

Origin of Chinese ancient glasses——study on the earliest Chinese ancient glasses

The earliest Chinese ancient glasses before the West Han Dynasty (200 BC) from different regions are studied. The glass samples were unearthed from Hunan, Hubei, Yunnan, Sichuan, Guizhou, Guangdong and Xinjiang of China. The chemical composition of these glasses samples is analyzed by proton induced X-ray emission (PIXE) technique, energy dispersive X-ray fluorescence (EDXRF) method and inductively coupled plasma atomic emission spectrometry (ICP-AES). It is shown that the glass chemical compositions belong to barium-lead silicate BaO-PbO-SiO2, potash soda lime silicate K2O (Na2O)-CaO-SiO2 (K2O/Na2O>1), soda potash lime silicate Na2O (K2O)-CaO-SiO2 (K2O/Na2O＜1) and potash silicate K2O-SiO2 glass systems, respectively. The origins of the earliest Chinese ancient glasses are discussed from the archaeological and historical points of view. These four types of Chinese ancient glasses were all made in Chinese territory using local raw materials. The glass preparation technology was related to the Chinese ancient bronze metallurgy and proto-porcelain glaze technology. The glass technology relationship between the East and the West is analyzed at the same time.     

论唐代池盐产地

唐代至少有49所盐池,主要分布在西北地区.与前代相比,池盐产地剧增,生产规模扩大,产量大大提高.这些变化与统一局面的形成、唐朝后期的盐法改革密切相关.     

装备研制中基于Bayesian网的数据挖掘

提出采用Bayesian网挖掘装备研制中的试验数据；采用列联表的方法，对独立性检验中基于信息论的方法进行了改进，使确定网络拓扑结构的过程更加客观；挖掘得到Bayesian网后．探讨了其在失效源判定和发现系统设计缺陷等方面的应用。     

用Origin 6.0绘制波函数平面图形

Origin6．0作为一个数学软件平台，集数据管理与分析、二维及三维函数和离散数据绘图、程序开发等多功能于一体，广泛用于科学研究和工程计算。本文利用Origin6．0软件的函数绘图功能，绘制氢原子径向波函数、径向密度函数、径向分布函数、氢原子轨道及电子云的角度分布、杂化轨道等二维图形。给出了波函数的软件可读化形式和绘图的实际操作过程。与其它函数绘图方法相比，界面更友好，操作更方便。