Effects of feed composition,protein denaturation and storage of milk serum protein/lactose powders on lactosylation

During whey powder production, the feed is subjected to several heat treatments which can cause lactosylation of proteins. In this study, lactosylation of whey proteins was evaluated in spray-dried powders before and after storage by varying the native protein fraction as well as the serum protein/lactose ratio in the powders. The lactosylation of native α-lactalbumin and β-lactoglobulin in the powders before storage was not affected to a large extent by the protein denaturation or if the feed had been heat treated in a high or low lactose environment. After storage (relative humidity of 23.5%, 30 °C, 25 days), the kinetic of lactosylation tended to increase with increasing native protein fraction and bulk protein content in the powders. An explanation could be that proteins dissolved in the lactose glassy structure might have a lower reactivity, while proteins present in the protein glassy structure with dissolved lactose may display higher lactosylation reactivity.     

Unsupervised Segmentation of Stereoscopic Video Objects: Constrained Segmentation Fusion Versus Greedy Active Contours

In this paper, we present a novel memory access reduction scheme (MARS) for two-dimension fast cosine transform (2-D FCT). It targets programmable DSPs with high memory-access latency. It reduces the number of memory accesses by: 1) reducing the number of weighting factors and 2) combining butterflies in vector-radix 2-D FCT pruning diagram from two stages to one stage with an efficient structure. Hardware platform based on general purpose processor is used to verify the effectiveness of the proposed method for vector-radix 2-D FCT pruning implementation. Experimental results validate the benefits of the proposed method with reduced memory access, less clock cycle and fewer memory space compared with the conventional implementation.     

碱法造纸黑液驱油研究

在玻璃细珠充填柱人造岩心模型上进行了碱法造纸黑液驱替稠油的实验研究，考察了稠油酸值、盐、温度、岩心渗透率、注入量和注入方式的影响。在实验条件下碱法造纸黑液驱稠油的采收率较水驱提高２５％     

永恒的回答——维斯康尼的建筑艺术

本文以维斯康尼的四个建筑作品为例分析了其建筑设计的艺术特性。凭借对“限制”内涵的深入思考和领会，维斯康尼以其独特的手法和操作方式营建其作品的永恒性。     

Utilities in the sky?: Comparison of space-based and terrestrial solar power systems

Could huge arrays of space-based solar power systems one day supply utility scale electricity to the electric power grid on earth? How realistic a possibility is this option for alternative energy supply at the moment? Finley R. Shapiro, USA compares space-based and terrestrial solar power systems.     

激光导向伺服系统中满意PID调节器的LMI设计

利用带有图像处理功能的小型激光导向伺服系统,可以大大降低目标坐标测定仪操作手跟踪动态飞行目标的操作难度,从而提高激光回波率.与经典的矩阵分解方法不同,本文以线性矩阵不等式方法,研究了激光导向伺服系统的满意PID调节器设计问题.首先从约束指标的相容性出发,给出满足与给定圆形极点约束相容的输出方差的取值范围.然后,在此取值范围内,得到了求取同时满足上述两种约束的PID调节器参数的方法.靶场试验结果证明了其有效性.     

一种两性离子聚合物的合成性能及应用分析

本文合成了一种两性离子聚合物：丙烯酰胺—二甲基二烯丙基氯化铵—丙烯酸共聚物（ＰＡＤＡ），讨论了三种单体的投料比对产物的组成影响。对它的结构进行了红外表征，就其絮凝、粘土防膨、抗温、抗盐性能进行了研究。结果表明：ＰＡＤＡ具有好的防膨能力和良好的抗温抗盐性能，并有絮凝能力。     

标准化钻速法检测地层压力技术的改进与应用

利用钻井资料检测地层压力的方法，基本上都是以泥岩的压实规律为基础，以钻速的变化为根据的。但是在钻井过程中影响钻速的因素很多，可以衡量一种检测方法优劣，主要是看其能否合理、全面地考虑诸多影响因素，能否适用于现场。本文介绍标准化钻速法检测地层压力的基本原理和工作步骤，提出了适用于现场的改进的数学模型和应用方法，并与实测值很接近。