支链烷烃折光指数与其分子结构之间定量关系的二级结构信息法研究

本文根根分子结构的特点,从分子间力的角度系统探讨了支链烷烃的折光指数与其分子结构之间的关系,提出了一种探讨结构性能关系的新方法一二级结构信息法,解决了拓扑万法普遍存在的“退化”问题,提高了计算结果的准确度。应用本文方法对138种支链烷烃折光指数的计算结果表明,计算值十分接近实验值。计算结果的平均相对误差为±0.001。应用本文定量关系,不仅能够预测支链烷烃的折光指数,而且有助于揭示物质结构性能关系之间的奥秘。     

科技汉语句法结构二维分析模式

目的：提出一种能清晰直观地展示科技汉语句法结构的分析模式。方法：针对理科教材，以多维的视角分析科技汉语中定义、定理、定律的句法结构。结果：发现句子的口头或书面表达形式从语序上看是一维的，但从句法结构分析是多维的；提出了一套科技汉语句法结构二维分析模式，包括基本符号和基本句式。     

一种解释结构模型的优化算法研究

解释结构模型被广泛应用于医疗、教育等领域,但相关理论发展较为缓慢。为加快解释结构模型的计算速度,丰富解释结构模型相关理论,通过对系统各要素所对应有向图的本质关系进行分析,对该模型中的级间划分方法作更深一步解析并给出优化算法,发现有向图中若不存在回路,则有向图汇点对应的是最高级要素集合中的要素,因此汇点可以从缩减可达矩阵中直接找出,从而能对复杂系统要素更快地进行分层。对应的优化算法相比传统方法减少了一倍左右的计算量,并通过实证分析进行验证。该研究结果为解释结构模型方法优化提供了一种新诠释。     

FAILURE SURFACE AND CAPACITY OF REINFORCED CONCRETE MEMBERS SUBJECTED TO BIAXIAL TENSION

A computer program is developed for the nonlincar analysis of prestressedconcrete and nonprestressed concrete members subjected to combined biaxial bending andaxial load.The strength-interaction diagrams and failure surface are obtained.Thestrength design formulae are proposed.     

Modelling success networks to improve the quality of undergraduate education

Discussions of support and intervention in undergraduate university education are dominated by discussion of attrition. This study quests more broadly in arguing that support and intervention for undergraduate students may also benefit from models of engagement and success as well as conventional risk and failure. Supporting this proposition is a study that involved multifactorial approaches based in a combination of aspects of social network theory and social ecology theory. Analysis was enacted through social network analysis of archival data sets derived from a single cohort of 4065 undergraduate students at a regional Australian university. The findings suggest that models of academic success are suited to examination of the broader issues of student agency and undergraduate university education. The success networks developed are uniquely student-centred and place-based and may serve as more nuanced models for university intervention and support structures and mechanisms.     

系统科学视野中的高等教育强国

任何一个国家的高等教育都可以看成是一个相对独立的系统,因而也就可以或者说能够从结构和功能两个最基本的维度透视高等教育强国的内外部规定性.从系统科学的视角看,高等教育强国本质地表征为结构优化与功能耦合有机统一的高等教育系统,其中结构优化是高等教育强国的内部规定性,功能耦合是高等教育强国的外部规定性.     

Modelling Facebook usage among university students in Thailand: the role of emotional attachment in an extended technology acceptance model

The aim of this study is to examine the factors that influenced the use of Facebook among university students. Using an extended technology acceptance model (TAM) with emotional attachment (EA) as an external variable, a sample of 498 students from a public-funded Thailand university were surveyed on their responses to five variables hypothesized to predict their actual use of Facebook. Data were analysed using structural equation modelling and the results showed that perceived usefulness (PU), attitude towards technology use (ATU), and EA had direct and significant influences on actual use, while perceived ease of use (PEU) was an indirect determinant of Facebook use. EA has direct and significant influences on all core variables in the TAM: PU; PEU; ATU; and actual use. Together, the PU, ATU, and EA explained 35.1% of the variance in students' usage of Facebook. Relatively, the variation in ATU and PU accounted by their determinants amounted to 55.5% and 50.2%, respectively.     

半导体多相光催化在大气污染治理中的应用

对半导体多相光催化氧化降解大气有机污染物的机理、应用、存在问题及发展方向等作了简要的介绍和评述.     

叶片数控砂带磨床的磨削工艺分析及结构设计

针对汽轮机叶片的结构特点,结合砂带磨削的工艺特性,进行了叶片砂带磨削的工艺分析。在对叶片磨削运动分析的基础上,进行了叶片数控砂带磨床的总体结构设计,并对砂带磨床的关键结构件进行了力学性能有限元分析。     

地方政府间关系--被遗忘的国家结构形式维度

地方政府间关系是被遗忘的国家结构形式维度。然而,这种现状并不能成为否认地方政府间关系的重要性的理由。从我国的宪政实践和美国宪法的相关规定来看,地方政府间关系应当成为宪法规定的重要内容之一,也应当成为我国宪法学的重要研究对象之一。