硅酸铋晶体的蚀像形貌

本文研究了提拉法生长的硅酸铋晶体(BSO)的蚀像形貌,比较了{100},{110},{211},{111}面族的腐蚀像特征和腐蚀速度,并用周期性键链(PBC)的形貌理论分析了腐蚀形貌。通过蚀像形貌特征便可方便地进行晶体定向,准确地确定各族晶面之间的相对位置和极轴的方向等。     

Application of a Compaction Simulator to the Design of a High-Dose Tablet Formulation. Part I

The compaction properties of an investigational drug are studied by the use of a compaction simulator. The effects of punch velocity over the range of 30-640 mm^-1 on the compaction properties of the pure drug and a variety of formulas incorporating a high dose of the active compound have been investigated. The data were analyzed by applying the Heckel equation. The pure drug was found to have a high yield pressure at a relatively low punch velocity of 31 mm^-1. As the punch velocity was increased there was a decrease in crushing strength, primarily as a result of increasing yield pressure. These findings indicate that the pure drug predominantly consolidated by fragmentation and elastic deformation, with a slow plastically deforming component. The information obtained on the consolidation mechanism of the pure drug and, subsequently, on model formulas were instrumental in the design and selection of a robust formula and granulation process. The advantages of conducting dosage form design and characterization studies during the early phase of tablet formulation using means such as a compaction simulator are emphasized in this investigation.     

钢筋混凝土烟囱有井架整体爬模施工技术

本文主要 根 据三 明 钢铁 厂130m~2 烧 结机 改造 工 程 60m 和 100m 烟 囱 的施 工实 例 ,详 细介 绍 了钢 筋 混凝 土烟 囱 有井架 整 体爬 模的 施 工新 方 法,并 取 得了 良好 的 效果 。     

柱体自由扭转时的最优横截面形式

当柱体自由扭转时，柱体的抗扭性能与横截面形式有关，针对单连通域下的具有最优抗扭性能的横截面形式问题，本文建立了相应的最优形式控制模型，并通过变分法求解得到：在横截面面积相等的情况下，圆截面是所有截面中使结构整体应变能最小和扭转刚度最大的截面形式，这与圣维南所给的一般性结论是一致的。     

中国传统园林建筑审美意向的基本特征初探

本文以中国传统园林建筑为基点,结合艺术理论和具体的艺术形象,对传统园林建筑的基本元素、空间组织,整体形式和气氛表达进行了分析,并探讨其运用于当代设计条件的方式。     

一种高效的机房软件安装方法

在机房管理实践的基础上，提出了综合注册表管理、系统设置、网络克隆等技术的一种高效的机房软件安装方法，这种方法具有安装效率高，易于恢复等特点，是机房管理的有效方法。     

参数强迫激励下非线性振子尖点型奇点的分叉

本文首先研究了不具有Z_2—对称性时的规范形理论和退化向量场的普适开折理论。然后利用这些理论研究了参数激励与强迫激励联合作用下非线性振动系统的尖点型奇点的余维2退化分叉。     

Decomposition of Time Series Dynamic Linear Models

This paper derives the admissible decompositions for a time series dynamic linear model, assuming only that the model is observable. The decompositions depend on factorizations of the characteristic polynomial of the state evolution matrix G into relatively prime factors. This generalizes the method of West (1997 ) which considers one decomposition in the particular case where G is diagonalizable. Conditions are derived for a decomposition to be independent. These results show that no autoregressive process of order d has an independent decomposition for any integer d . Two illustrations of this procedure are discussed in detail.     

艺术建筑设计的探索

通过徐州一中艺术楼的设计实践，寻求优美而独特的艺术形象，并用纯几何形体的组合来达到功能与形式的完美统一。