粉末型五味子果醋生产工艺研究

以新鲜五味子为原料,对粉末醋制作工艺进行优化并对其产品质量进行分析。粉末醋制作工艺分为酒精发酵、醋酸发酵、果醋包埋、后熟以及喷雾干燥5个环节。通过单因素试验探讨酒精发酵工艺以及醋酸发酵工艺;通过响应面分析法优化果醋包埋条件和喷雾干燥条件。单因素试验结果表明,酒精发酵时果酱糖度调至13°Brix,醋酸发酵时醋酸菌接种量为10%时发酵效果较好;响应面分析结果表明,果醋包埋的最佳工艺条件为β-环糊精、卡拉胶以及藻胶钠的添加量分别为5.01%、0.63%、1.04%;喷雾干燥最佳工艺条件为进风量、进风温度以及进料速率分别为20.70 m^3/min,139.2℃以及499.6 mL/h。     

电力市场环境下的发电容量充裕性（二）几种现有方法的分析

鉴于单一能量市场模式难以确保发电容量充裕性,国际上已提出多种旨在解决该问题的方法。就设计思路、理论基础、实践经验和方法特点等方面,较系统地总结和分析了已提出的近似传统规划方法、容量费用模式、容量责任和装机容量模式、区域装机容量市场法、期权法、运行备用支付法和用户侧容量定购法等。对这些方法在理论上的优缺点和应用方面的可行性、适用范围、配套措施等阐明了观点,在此基础上对确保中国发电容量充裕性提出了初步建议。     

电力市场环境下的发电容量充裕性（二）几种现有方法的分析

鉴于单一能量市场模式难以确保发电容量充裕性,国际上已提出多种旨在解决该问题的方法。就设计思路、理论基础、实践经验和方法特点等方面,较系统地总结和分析了已提出的近似传统规划方法、容量费用模式、容量责任和装机容量模式、区域装机容量市场法、期权法、运行备用支付法和用户侧容量定购法等。对这些方法在理论上的优缺点和应用方面的可行性、适用范围、配套措施等阐明了观点,在此基础上对确保中国发电容量充裕性提出了初步建议。     

基于移相加权球面单簇聚类的周期时间序列异常检测

针对传统的单分类器不适用于周期时间序列的异常检测,提出了一种基于移相加权球面单簇聚类的单分类器PS-WS1M-OCC.通过在聚类过程中增加高效的循环移位操作,解决了时间序列记录之间相似度计算的问题.另一方面,基于时间序列记 录的权重分布,提出了新的阈值自适应确定方法,从而使单分类器对训练集包含的异常数据和参数设置不敏感.实验表明,本文提出的单分类器可以用于周 期时间序列的异常检测;与传统的单分类器相比,可以成功地从包含异常数据的训练集中进行无监督学习,对训练集包含的异常数据鲁棒,并且对参数不敏感.     

Water Binding and Ingredient Dispersion Pattern Effects on Surimi Gel Texture

Water binding, thermotransitional properties and the dispersion pattern of ingredients were studied in relation to their texture-modifying effects in surimi gels. The DSC-measured bound water (unfreezable at ?30°C) of surimi gels prepared with potato starch with and without pregelatinization highly correlated with compressive force (r=0.94) and inversely correlated with expressible moisture (R=?0.99) of the gels. For nonfish proteins, however, physically bound water contributed more than the DSC-measured bound water to gel strength. The ability to undergo thermal transition (size expansion and water absorption) and dispersion pattern of ingredients were responsible for the differences in texture-modifying effects.     

切割对C形冷弯型钢短柱初始几何缺陷的影响

以2个辊轧成型的C形冷弯薄壁型钢截面为研究对象，在长构件中切割短柱，测试了切割后短柱的歪曲变形和切割前后短柱沿长度方向的初始几何缺陷。结果表明：切割后短柱产生了明显的歪曲变形，进而引起很大的初始几何缺陷，将影响短柱的轴压承载力和破坏模态。     

Hydrodesulfurization and Hydrodenitrogenation Kinetics of a Heavy Gas Oil over NiMo/Al2O3 Catalysts

1 Introduction The increasing demands of high quality and environment-friendly petroleum products require refineries to treat more heavy oil and residue in the worldwide. Athabasca bitumen derived heavy gas oil(HGO) is a typical feedstock comprising high nitrogen and sulfur heteroatomic compounds, which results in many problems in utilization, such as reducing the stability of fuels, causing storage problems and air pollution. So they need to be removed before being treated in the following u…     

Conductive powder preparation and electrical properties of RuO2 thick film resistors

RuO₂ powders were prepared under different conditions to vary their properties. A study was made of the powder properties and electrical characteristics of thick film resistors (TFRs) containing an RuO₂ powder as a conducting component. Both crystalline size and specific surface area varied with calcination temperature but the change in the washing solution had different effects upon the two relationships. Variations in the total pore volume produce differences in the specific surface area at the same crystalline size. The resistivity of TFRs decreases and the temperature coefficient of resistance (TCR) becomes more positive with decreasing crystalline size. TFRs having conductive powder of higher specific surface area at the same crystalline size show lower resistivity and higher TCR values. This revised version was published online in July 2006 with corrections to the Cover Date.     

聚醚酰亚胺中空纤维超滤膜的研究（I）膜结构、热性能和机械性能

以聚醚酰亚胺（PEI）为膜材料,聚乙烯吡咯烷酮（PVP）和聚乙二醇（PEG）等添加剂,N－甲基吡咯烷酮（NMP）和二甲基乙酰胺（PMAc)为溶剂,采用干／湿法纺丝技术制备出聚醚酰亚胺中空纤维膜,提高了PEI超滤膜的耐污梁性,通过改变纺丝液中不同的添加剂（如PEG或PVP）,PEI中空气纤维膜断面可从指状孔转变成海绵状,此外,讨论了聚醚酰亚胺中空纤维的膜结构,热性能和机械性能。