茶树籽和油茶籽中脂溶性化学成分的比较研究

收集24个不同品种的成熟茶树籽和油茶籽样品,分析出仁率、脂肪、脂肪酸组成以及角鲨烯和β-谷甾醇等脂溶性化学成分状况。结果表明,13个油茶籽样品中,平均出仁率、脂肪、棕榈酸、棕榈烯酸、硬脂酸、油酸、亚油酸、亚麻酸、顺-11-二十碳烯酸分别为70.1%、51.7%、13.8%、0.1%、3.1%、72.7%、9.4%、0.6%、0.4%,而11个茶树籽中平均值分别为64.2%、31.6%、14.7%、0.1%、2.7%、59.2%、21.8%、0.4%、1.0%。油茶籽中角鲨烯含量为61.3~296.1 mg/kg,茶树籽的则为17.2~227.0 mg/kg。油茶籽中角鲨烯平均含量149.0 mg/kg为茶树籽平均112.5 mg/kg的1.32倍。茶树籽中β-谷甾醇含量为313.3~558.1 mg/kg,油茶籽中则为52.6~122.8 mg/kg。前者平均值443.3 mg/kg为后者80.8 mg/kg的5.5倍。通过相关分析,油酸与单不饱和脂肪酸,亚油酸与多不饱和脂肪酸,均呈现绝对正相关。通过聚类分析,茶树籽与油茶籽能很好地被区分成两大类。     

主成分分析的图像压缩与重构

针对图像占用空间大,特征表示时维数较高等的缺点,系统介绍了主成分分析（PCA）的基本原理。提出了利用PCA进行图像数据压缩与重建的基本模型。实验结果表明,利用PCA能有效的减少数据的维数,进行特征提取,实现图像压缩,同时并根据实际需要重建图像。     

汽车结构件的压铸

汽车结构件具有很高的力学性能要求和本体品质要求,采用压铸工艺生产难度大。针对汽车结构件特点和多年经验,开发了汽车结构件压铸工艺。该工艺主要涉及压铸机、压铸模具、合金材料、合金液处理、真空应用、工艺优化等因素。生产实践证明,正确处置上述工艺因素,完全可以在通用压铸机上生产出合格的结构件。     

核燃料用γ-U合金的成分规律

铀合金作为一种重要核燃料,其体心立方结构的高温稳定的γ-U合金具有较好的综合性能,是合金设计所追求的目标。本文引入描述稳定固溶体结构的"团簇加连接原子"模型,用于建立γ-U固溶体合金的结构模型和相应成分式,指出其结构单元为体心立方第一近邻配位多面体团簇加3个连接原子构成。进而利用该结构单元对现有合金成分进行了解析,能够稳定形成体心立方bcc结构的合金均满足上述模型,如[Mo-U14]Mo3(U-10.7Mo),[Zr-U14]Nb3(U-7.5Nb-2.5Zr,即不锈铀)等,这些合金实际上均在各自体系中具有最优良的结构稳定性,显示出优异的耐蚀性。本文证实,基于团簇加连接原子模型的成分设计方法在预测γ-U合金成分与性能上具有重要指导价值。     

基于田口法和主成分分析法的高速铣削316L不锈钢的参数优化

为了全面考虑切削参数对切削过程中切削力和振动的综合影响,将田口法与主成分分析法相结合,应用SPASS软件,以切削合力和切削振动为综合目标进行切削参数优化,得出小直径铣刀高速铣削316L不锈钢外形轮廓的最优的切削参数组合,并验证了结果的正确性。     

The definition of partnering as a Wittgenstein family‐resemblance concept

This article on partnering and family‐resemblance makes two contributions to the debate about the definition of partnering in construction. The first is a distinction between general prerequisites, components and goals when discussing the concept. In order to understand what is specific about partnering the focus should be on the components, which are identified through a literature review. The second contribution is to apply Ludwig Wittgenstein's idea of family‐resemblance to the partnering concept. His idea is that a complex concept can be understood as a network of overlapping similarities. From the literature review it is concluded that there are two necessary components in partnering – trust and mutual understanding – and that a number of different components can be added to form a specific variant of partnering. This provides a new method to define the vague and multifaceted concept of partnering in a flexible and structured way.     

开发定制功率模块解决方案:哪些是必须要考虑的

在过去的几年中,由于最终应用中节约成本和提高效率的严格功率设计约束,使得功率模块市场的需求迅速变化。本文概述了提供定制解决方案,在满足不断变化的功率模块设计和性能的市场需求时所要考虑的方方面面。     

Object-Oriented Connector-Component Architectures

This paper presents an important extension of our contribution to FESCA '04, which presented a generic framework for connector architectures. These architectures were defined by components, consisting of a body specification and a set of export interfaces, and connectors, consisting of a body specification and a set of import interfaces plus connecting transformations in both cases. A major restriction of this framework was given by the assumption of non-overlapping connector interfaces.In order to make the generic framework for connector architectures more applicable, it is enriched by the possibility of handling overlapping connector interfaces. Fortunately, it is possible to extend the main results presented at FESCA '04 also to the new framework. Moreover, it is shown that the new framework can be applied to UML class diagrams, state machines and sequence diagrams as heterogeneous specification techniques. The resulting connector framework, including a concept for the composition of components and architectural reduction for UML specifications, is illustrated by a case study concerning the meta data management in Topic Maps.     

基于JavaBean的表单数据处理及结果同页显示技术

在B/S架构的开发模式中,网页中表单的数据经常是在一个网页中获取,然后传送到另一个网页进行处理和显示的。通过对JavaBean组件技术和JSP技术的研究后,发现将JavaBean组件技术和JSP技术进行组合应用,可以在同一个网页中实现表单数据的获取、处理和对数据处理结果的显示。     

Foundations for a Combination of Heterogeneous Specification Components

In this paper, we advocate an approach to combine formal specification components. Our work aims at building or reusing specification components, and compose them with a gluing language constituted of a minimal but sufficient set of operators. The glue allows to have at one's disposal a global formal specification with heterogeneous components as basic entities. The interests are manifold: modelling the different aspects of systems, allowing the use of many existing specification languages, formalizing the links between components in an easy and graphical way, making the reuse of components easier. A case study about a vending machine is specified to illustrate how this approach could be practically used.