BIM模型相连构件获取方法

目前,由于BIM模型建立不规范和IFC文件解析时出现问题,从业者在获取相连构件时有一定困难,因此,本文提出了一种以改良的OBB包围盒碰撞检测算法为基础的相连构件查找方法。该方法首先获取任意两个构件的位置信息,再利用OBB包围盒算法构建包围盒,并对该包围盒进行检测,若包围盒的尺寸比构件的大,则构造该构件的OBB层次包围盒树,然后给其中一个构件的包围盒一偏移量,最后用碰撞检测算法检测两构件是否发生碰撞,若发生碰撞,则为相连构件,若未发生碰撞,则为不相连构件。     

高校学生收费系统的设计与分析

针对日趋复杂的高等院校学生的收费管理问题,开发了基于B／S和C／S模式的高校学生网络收费管理信息系统。主要介绍了基于C／S模式的学生收费系统的设计方法,给出了基本对象关系模型,并完成了模型的静态分析与动态分析。     

MasterCAM后置处理钻孔循环参数页面关系对应研究

研究MasterCAM中后置处理器与主体钻孔循环页面参数,对比分析出文本显示TXT、后置处理PST文件与主体页面之间的关系。以西门子802D的钻孔循环为例,解决用户在使用后置处理器进行二次开发时的数据输入图形接口的对应关系,方便用户进行后置处理二次开发。     

Child parent relationship training: Parents' perceptions of process and outcome.

Child Parent Relationship Training (CPRT) is a play-based parent consultation model designed for children (ages 3–10) who may be struggling emotionally or behaviorally. CPRT aims to help parents develop empathy and appreciation for their children, increase parenting ability and confidence, and strengthen parent–child relationships. To date, the majority of CPRT studies have been quantitative in nature. There has been limited research on the effectiveness of CPRT using qualitative methodologies, but existing qualitative studies show promising results. The current study utilized an ethnographic approach to examine the acceptability and perceived effectiveness of CPRT. Findings indicated that the parents perceived the CPRT model to be both acceptable and effective (e.g., increased knowledge and confidence in parenting, enhanced parent–child communication, strengthened parent–child relationships, and reduced behavioral problems among child participants). Limitations of the study and implications for future research are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

维数据仓库建模技术及其在数据建模中的应用

该文首先介绍了数据建模理论与方法的应用现状,接着介绍了基于星型模式的维数据仓库建模技术,然后给出了数据建模的步骤,最后分析了三峡工程散装水泥粉煤灰调运信息系统(TGP-CFADIS)分析型数据建模的过程。     

Dependency preserving refinements and the fundamental problem of database design

We introduce a new point of view into database schemes by applying systematically an old logical technique: translation schemes, and their induced formula and structure transformations. This allows us to re-examine the notion of dependency preserving decomposition and its generalization refinement. We demonstrate the usefulness of this approach by recasting the theory of vertical and horizontal decompositions in our terminology. The most important aspect of this approach, however, lies in laying the groundwork for a formulation of the Fundamental Problem of Database Design, namely to exhibit desirable differences between translation equivalent presentations of data and to examine refinements of data presentations in a systematic way. The emphasis in this paper is not on results. The main line of thought is an exploration of the use of an old logical tool in addressing the Fundamental Problem. Translation schemes allow us also to have a new look at normal forms of database schemes and to suggest a new line of search for other normal forms. Illustrating our techniques we show that every scheme specified by functional and inclusion dependencies has a dependency-preserving refinement into BCNF. Furthermore we give a characterization of the embedded implicational dependencies (EID's) using FD's and inclusion dependencies (ID's) and a basic class of refinements consisting of projections and natural joins.     

客户关系管理系统数据仓库的建立

数据仓库建设是一项有挑战性的工作，而客户数据仓库建设除了符合数据仓库建设的一般规律外，还有自己的特点，探讨了客户数据仓库建设过程中要注意的问题。     

聚合度和磺化度对油井水泥外加剂SPS性能的影响

本文测定了室内合成聚苯乙烯磺酸钠（ＳＰＳ）样品处理的Ｇ级水泥浆表现粘度、样品抗盐析能力及在Ｇ级水泥上的吸附量，讨论了ＳＰＳ的聚合度和磺化反对ＳＰＳ在水泥浆中减阻效果的影响。ＳＰＳ样品以废旧聚苯乙烯塑料为原料制备。     

幼年大鼠甲状腺γ线损伤效应的剂量效应关系

１５日龄大鼠甲腺γ线局部单次外照射后６周，观察和测量滤泡和滤泡上皮细胞形态结构的变化，综合分析甲状腺辐射损伤效应。结果表明，幼年大鼠甲状腺具有较高的辐射敏感性，０．５Ｇｙ照后即可出现显著性变化。通过实验得出了一些形态计量学指标变化与照射剂量之间的定量关系。     

苜蓿黄酮的分离及其生物转化研究进展

苜蓿属植物资源丰富,并且含有大量的黄酮类物质。黄酮类物质具有多种生物活性及药理作用。本文对苜蓿黄酮的分离、结构鉴定以及黄酮苷的生物转化的最新进展等进行了总结,并对苜蓿黄酮的发展方向进行了探讨。