葵花籽油甘油二酯的制备及其在发酵乳应用中的特性研究

以葵花籽油为原料,通过酶法甘油解反应制备富含亚油酸的甘油二酯(DAG)。以乳脂DAG作对比,分析了葵花籽油DAG的主要脂肪酸组成,并作为脂肪替代物制备酸奶,测定了富含亚油酸DAG酸奶的流变特性和质构特性。结果表明,葵花籽油DAG最佳制备工艺条件为:甘油与葵花籽油质量比1∶10,脂肪酶添加量7. 13%,反应时间12. 35 h。在最佳条件下,葵花籽油DAG中DAG含量可达49. 21%,亚油酸含量为60. 17%。与乳脂DAG酸奶及乳脂酸奶相比,葵花籽油DAG酸奶体系的表观黏度较高、凝胶体系凝聚性更好,酸奶结构更稳定。     

核电站氢点火器用耐高温电缆的性能研究

采用CAP1400设计及相关核电站法律法规的要求,设定试验参数,对氢点火器用耐高温电缆进行弯曲、辐照和热寿命老化及耐热老化等性能研究。试验结果表明:高温电缆具有耐弯曲和耐浸水的性能;高温电缆通过辐照和热寿命老化试验;耐高温电缆具备长期耐350℃的特性。     

Haemagglutinating and Trypsin Inhibitor Activities of Lupin Seed (Lupinus angustifolius)

The phosphate buffer saline (PBS) extracts of defatted lupin seed flour showed haemagglutin activity only with trypsinized rabbit erythrocytes. The lectin tested in crude extracts showed specificity towards galactose and lactose. Heat stability studies of PBS extracts on incubation for 10 min showed no reduction of haemagglutinin activity in the temperature range 40°C to 80°C while no haemagglutination was observed when incubated at 90°C for 8 min. The trypsin inhibitor activity of flour extracts was 14.4 TUI/mg protein.     

Analytical Electron Microscopic Studies of Doped Dicalcium Silicates

Dicalcium silicates having CaO/SiO₂ molar ratios of 1.8 to 2.2 were sintered at 1450°C for 90 min with or without small quantities of dopants (K₂O or Al₂O₃) and were air quenched. The microstructures of the fired samples were characterized using electron microscopy (SEM and TEM) and associated microanalytical techniques. There was no evidence for the existence of Ca_1.8SiO_3.8 or Ca_2.2SiO_4.2. Amorphous grain-boundary phases were observed between grains and as inclusions within the grains; the amounts decreased as CaO/SiO₂ ratios increased. The compositions of the amorphous phases were always rich in dopants and had a CaO/SiO₂ ratio close to that of wollastonite. High levels of Al₂O₃ were observed to enter the β-Ca₂SiO₄ grains under lime-rich conditions (CaO/SiO₂= 2.2) up to a saturation level of about 3.0 wt%. Some additional crystalline phases were observed to form depending on stoichiometry and dopant level.     

REVERSE OSMOSIS TRANSPORT and MODULE ANALYSIS FOR GREEN TEA JUICE CONCENTRATION

Reverse osmosis experiments were performed to concentrate the green tea juice, and the experimental data was analyzed by using a set of transport equations together with osmotic pressure and density data of the green tea juice. the transport parameters obtained numerically by the above analytical procedure were then used to calculate several dimensionless quantities that can characterize a reverse osmosis module. an example of module design calculation was attempted using the dimensionless parameters so obtained. It has been found that an increase in operating pressure reduces the module length significantly when the feed tea juice concentration is high. an increase of the mass transfer coefficient on the high pressure side of the membrane has the same effect.     

Network coding-aware cache replacement policy in on-demand broadcast environments

Network coding has been proved to be an effective technique in improving the performance of data broadcast systems because clients requesting different data items can be served simultaneously in one broadcast. Previous studies showed that its efficiency is highly related to the content of clients’ cache. However, existing data broadcast systems do not take network coding information into account when making cache replacement decisions. In this paper, we propose two networks coding-aware cache replacement policies called DLRU and DLRU-CP to supplement network coding assisted data broadcast in on-demand broadcast environments. In DLRU, both data access and decoding contribution are taken into account to make replacement decisions. DLRU-CP is based on DLRU but allows clients to retrieve decodable data items that have not been requested yet. The performance gain of our proposed cache replacement policies over traditional cache replacement policy is shown in the simulation results, which demonstrate conclusively that the proposed policies can effectively reduce the overall response time.     

FZQ2000Ⅱ型自升塔式起重机非常规拆卸方案

大唐宁德电厂2×600MW机组的4号机锅炉安装用的FZQ2000Ⅱ型自升塔式起重机受输煤栈桥的影响无法整机下降,给塔式起重机的拆卸带来很大困难。根据对现场实际情况的分析,通过改变施工工序和合理安排高空拆卸吊装方法相结合,制定了科学的非常规拆卸方案。最终,安全、优质、高效地解决了塔式起重机的拆卸难题。     

一种新的数控方式

提出一种新的数控方式。即主运动用普通动力或液压驱动,光栅检测,数控联动。(因大功率,高速侍服电机系统昂贵),以及磨床数控改造的硬件接口电路以及用汇编语言编写数控软件。