Comparison of the affinity and selectivity of insoluble fibres and commercial proteins for wine proanthocyanidins

The fining action of commercial proteins and insoluble fibres for wine proanthocyanidin (PA) were compared. Fibres were prepared from fresh apple and grape sources, and their corresponding pomaces. PA removal by fibre was via adsorption, and required a higher dose to achieve a fining effect comparable with proteins. A principal component analysis data model revealed that PA molecular mass was significant in defining the fining response, and reflected changes in the proportion of the dominant terminal PA subunits catechin and epicatechin, but not epicatechin-3-O-gallate. For PA extension subunits, changes in epigallocatechin were inversely correlated with epicatechin and epicatechin-3-O-gallate. Generally, the application of proteins and fibres reduced PA molecular mass. Selectivity for PAs by subunit composition was variable between treatments, but differences were minor. This work demonstrates the potential use of fibres as an alternative to proteins in winemaking. Benefits, and possible limitations of such an approach are discussed.     

用Marc软件提供的接触分析功能简化网格划分

利用大型结构分析程序MSC．Marc提供的接触分析的功能，以保证有限元网格不发生穿透，使有限元疏密网格界面两侧各相应点的位移和应变在界面上协调，而不必过多考虑节点的协调关系。这样三维有限元网格的过渡易于实现，使有限元网格划分可以以积木式进行，简化了前处理工作，大大缩短对复杂结构的网格剖分的时间。而且．由于有限元网格剖分以积木式进行．使有限元网格的自动割分也简化了不少。     

立方晶系多晶体细观应力有限元分析

为研究多晶体宏细观力学响应,针对立方晶系单晶体提出形式与Hill屈服准则相关联的形状改变比能;以此为屈服考察量,建立适用于立方晶系的单参数Hill屈服准则;用MSCMare对立方晶系多晶体进行细观应力有限元分析．d—Fe多晶体样本单向拉伸有限元分析表明：多晶体的拉伸应力在细观尺度下分布不再均匀;多晶体3个样本的最大细观拉伸应力与最小细观拉伸应力的比值,在弹性状态下的平均值为2．1,在塑性强化阶段处于1．15～1．28之间．     

GCr15棒线材粗轧过程的隐式静力和隐式动力算法有限元模拟

借助大型商用有限元软件MSC.Marc,采用隐式静力和隐式动力有限元算法,对GCr15棒线材的粗轧过程进行了热力耦合有限元模拟,模拟采用生产实际中的轧制参数.2种算法的出辊速度、温度场和平均轧制力模拟结果基本一致,温度场模拟值与实测值的比较证明了这2种算法的可靠性.实际模拟时,隐式动力学算法计算时间少于隐式静力学算法,效率较高.     

火车车轮淬火过程数值模拟

为分析车轮淬火过程中的车轮各场量变化情况,利用MSC Marc商用有限元软件结合用户子程序开发对车轮淬火过程进行模拟计算. 通过模拟值和实测值的对比,模拟结果与实测结果吻合较好.     

Computatonal Intelligence: The Grid as a Post-Human Network

Research and design collaborative EZCT Architecture & Design Research has adopted grid computing to produce a series of furniture systems and other small-scale prototypes using genetic algorithms in combination with automated fabrication technologies. Here, cofounder Philippe Morel relates this design practice to the broader technical and social implications of various grid-computing projects, such as the online organisation Folding@Home, which utilises grid computing and distributed communities for the production and exchange of postindustrial knowledge. He argues that these ‘knowledge farms’ which create an ‘ambient factory’, are perhaps the ultimate form of social-economic production, transforming not only the evolution of design but of the communities that produce and eventually consume its products. Copyright © 2006 John Wiley & Sons, Ltd.     

热循环作用下太阳电池板单元结构寿命预测

试验测试了热循环过程中太阳电池板单元结构各被粘接层的热应变值,结合有限元MSC.Marc模拟的结果提出了以热应变极大值或残余热应变作为热循环条件下胶接结构的损伤参量,建立了预测太阳电池板寿命的数学模型。     

边坡锚杆蠕变力学特性数值分析

采用预应力锚杆加固边坡,锚杆的蠕变特性会使锚杆产生应力松弛的破坏性变形.因此,建立锚杆加固边坡蠕变力学模型,利用MSC Marc软件对所建立的模型进行蠕变分析,研究锚杆蠕变特性对锚杆预应力松弛的影响,详细给出在不同弹性模量及蠕变参数下锚杆的蠕变曲线和应力松弛曲线,从而进一步评价锚杆加固边坡的安全性能,为有效控制边坡的有害变形提供理论参考.     

响应面法优化高压脉冲电场提取沙棘果皮渣黄酮

沙棘黄酮具有抗氧化、抗菌消炎、降血脂等多种药理作用。以沙棘果皮渣为原料,以沙棘黄酮提取率为指标,采用高压脉冲电场辅助提取沙棘果皮渣中的黄酮类化合物,在单因素实验基础上采用响应曲面法考察了高压脉冲电场强度、脉冲数和料液比村沙棘黄酮提取率的影响。结果表明,沙棘黄酮最优提取条件为：电场强度20kV／cm、脉冲数10、料液LLI：15,此时黄酮得率为10．23mg／g,比碱提酸沉法和超声波法提取率分别提高了42％和19％。通过网归方程求解和响应曲面分析,得到了二次多项式提取回归模型,经验证实验值与模犁预测值拟合性良好。     

100 Year City (Maribor): The Virtual Concourse Reframed

For interactivity, the virtual world so often relies on a physical component, but how might virtual spaces be made more tangible as spatial environments for exchange? Under the direction of architect and RMIT University professor Tom Kovac, in 2012 the 100 Year City project rose to this challenge as part of the Maribor European Capital of Culture programme. Here, Guest-Editor and Deputy Curator of the project, Fleur Watson , describes how this ‘super studio’ incites cross-disciplinary exchange and the sharing of progressive design ideas for sustainable blueprints for our cities. It is an initiative that is to be continued under Kovac's directorship with the 100 Year City-themed Malaysian Biennale in the summer of 2015.