CHANGES IN PARTITION COEFFICIENTS of ALCOHOLS AS AFFECTED BY the PRESENCE of VARIOUS FOOD SOLIDS

Using homologous series of alcohols and varing temperatures, it has been demonstrated in this study that volatility of alcohols increases upon changes in the system which decrease their solubility in the liquid. Addition of solutes has various effects on volatility, depending upon their ability to interact with water and volatiles. Surface characteristics, including the number of binding sites and surface area, significantly affect interaction. When more than one type of solids is present, alcohols preferentially adsorb to the solid with higher affinity for alcohols, until all binding sites on the solid are occupied. Silica and soy protein increase solubility of alcohols in water by adsorbing them through hydrophobic association and/or hydrogen bonds. Sodium silicoaluminate, xanthan gum and, to some extent, maltodextrin show less interaction with alcohols than with water.     

热轧带钢蛇行过程的动态模拟仿真

带钢在轧制过程中，由于一些因素影响会使带钢轧机左右受力不对称，从而产生蛇行现象。文中对影响蛇行的因素进行了分析，并应用Matlab软件对热轧带钢的蛇行过程进行模拟仿真，其结果与生产实际情况相符合。     

On-board handling and freezing of the sea scallop, Placopecten magellanicus

The effects of on-board handling and freezing on the quality of meats from the sea scallop, Placopecten magellanicus , in the Atlantic Canadian fishery were investigated. The results show that meats frozen within 6 h of catching, pre-rigor, were markedly superior to meats frozen after storage in ice for up to 10 days, with lower drip loss, more tender texture, less flavour loss and higher overall acceptability.
Inferior results were obtained without pre-chilling of the meats before storage in cotton bags in melting ice and with live holding for 3 days followed by freezing and storage at minus 30°C for up to 6 months. Days in ice before freezing, however, exerted by far the greatest influence on quality.
According to these results, freezing on board warrants consideration on grounds of superior quality including increased yield of cooked product.     

带雨淋水膜的非耐热防火玻璃的火灾试验

研究了水膜对防火玻璃耐热性质的影响。用标准试验炉对门窗玻璃做火灾试验，温度高达1000℃。结果表明，对玻璃施用水膜能有效地经受试验的高温，水膜的蒸发潜热被用于保护建筑物的玻璃，免于因火灾造成融熔或炸裂。并且保留其完整性和绝缘性的试验时间由6min延长到100min。值得注意的是，玻璃表面的温度维持在90℃以下可持续100min。结论：用带水膜的防火玻璃替代通常装设的门是可行的。     

冷成型钢截面残余应力的有限元分析

冷成型钢截面上的残余应力可能是决定其性能和强度的一个重要因素。通过破坏性的试验方法对残余应力进行测量不仅费时,精度也很有限。本文提出了一个预测压弯成形薄壁截面上残余应力的有限元方法,该方法克服了实验室测量的缺点,提供了一个有力的工具来考察不同的成形参数对残余应力的大小和分布的影响,并因此可以对这些成形参数进行优化。在该方法中,通过解析的方法考虑了成卷和开卷的影响,并将得到的残余应力作为随后的冷弯过程有限元模拟的初始应力。经比较,本文方法的数值结果和实验室实测值吻合很好,证明了该方法的可行性和精度。本文方法给出了整个截面残余应力的分布和沿壁厚的变化,并解释了两个相同截面中残余应力可能会存在很大差别的原因。     

EXPERIMENTAL DETERMINATION AND PREDICTIONS OF BREAKTHROUGH CURVES IN A FIXED BED OF SILICA GEL USING THE TRANSFER UNIT APPROACH

A semi-empirical model was developed to predict the breakthrough curves of moisture adsorption on silica gel under different operating conditions. The model requires only the basic physical and transfer properties of the flowing gas stream. Experimental breakthrough curves were determined in this study for correlating some model parameters. These dynamic experiments were carried out with different values of the gas velocity, the inlet humidity, and the properties of the adsorbent. The breakthrough curves of the modified silica gel with neutron flux in a previous study were used to verify the proposed model. It is feasible to develop a single adsorption model to simulate the fixed-bed breakthrough curves for original and modified silica gels. The results show that the complex breakthrough curves can be predicted and are in very good agreement with the experimental data.     

考虑负荷和风电出力不确定性的输电系统机会约束规划

提出了一种考虑负荷和风电场输出功率不确定性、基于机会约束规划的输电系统规划方法。将Monte Carlo方法与解析的概率潮流计算方法相结合,得到含风电场电网输电线路的有功概率潮流分布。通过改进经典的输电系统规划模型,得到考虑负荷和风电场有功出力的概率分布、基于概率潮流计算的输电系统机会约束规划模型。为了有效求解该模型,设计了一种两步式遗传算法。该方法可以有效处理输电系统规划中的不确定性,并为规划人员提供比传统方法更丰富的信息。算例证明了该方法的有效性。     

Development of High-Thrust and Double-Sided Linear Synchronous Motor Module For Liquid Crystal Display Equipment

<正>Recently,there is an increasing requirement for controlling linear motion up to a few hundred of millimeter strokes in the area of the liquid crystal display(LCD) production equipment.The requirements of the motion system for LCD production equipment are high acceleration and high velocity with positioning accuracy.To satisfy these requirements,it has to be designed with the high-thrust force and low velocity ripple.In this work, high-thrust and double-sided linear synchronous motor (LSM)module is proposed and the developed high-thrust and double-sided LSM module is verified by performance test.