浅析连铸保护渣的冶金特性及在马钢的选用

概述了连铸保护渣的基本特性，并根据马钢保护渣的应用情况，设计分析了高拉速板坯、方坯、圆坯、异型坯和薄板坯连铸用保护渣的选用原则。     

Yield Stress and Relative Viscosity of Tomato Concentrates: Effect of Total Solids and Finisher Screen Size

Yield stresses of tomato concentrates, prepared using two finisher screens (0.69 mm and 0.84 mm diam) were determined using the vane method, Casson model, and dynamic rheological data. Magnitudes of vane yield stress were higher than those using other methods. They increased with increase in total solids and were about the same in concentrates from both screen sizes. Magnitudes of Casson viscosities of concentrates and serum viscosities from 0.84 mm screen were slightly higher than those from 0.69 mm finisher screen.     

Thermal Energy Consumption for Blanching and Sterilization of Snap Beans

Steam consumption for a water blancher and a continuous pressure sterilizer (CPS) was measured in a snap bean cannery. For the blancher, it ranged between 0.204 and 0.306 lb/lb of beans. The energy efficiency of the blancher was found to be between 26.3–52.3%. In a pilot scale test, the concentration of Ca, Mg, and K ions increased as the blanching water was recycled and the firmness of the beans after canning varied between 0.855 and 1.010 kN. Steam consumption by the CPS was related linearly to the loading rate of cans: steam consumed (lb/hr) = 1075.9 + 0.073 × (cans/hr).     

化学生物絮凝/悬浮床处理低浓污水

考察了化学生物絮凝 /悬浮填料床工艺处理低浓度城市污水的效果,并确定了最佳的运行条件。试验结果表明:在PAFC投量为 70mg/L(以Al2O3 计为 9. 7mg/L)、PAM投量为 0. 5mg/L、污泥回流比为 33%左右、悬浮填料床气水比为 2∶1,以及化学生物絮凝池各廊道的DO值分别为 1. 9~3. 2、1. 3 ~2. 5、0. 3 ~1. 5mg/L的条件下,处理COD为 105 ~255mg/L、TP为 1. 56 ~7. 97mg/L、SS为 60~228mg/L、NH3 -N为 8. 33~18. 05mg/L的城市污水时,对COD、TP、SS的去除率分别为 75. 8%、76. 2%和 90. 6%,对NH3 -N的去除率 >85%。出水COD、TP、SS、NH3 -N浓度均满足《污水综合排放标准》(GB8978—1996)的一级标准。     

锕系元素环境化学——锕系元素化学的新分支

20世纪70年代以来,在锕系元素化学和环境科学之间发展起来一门边缘学科——锕系元素环境化学。本文叙述了这门学科与核废物安全处置的关系,并简要地介绍了这门学科的研究内容、现状和发展方向。     

基于粗集的属性约简在电信企业决策中的应用

粗糙集理论是近代新兴的一种研究不完整、不确定知识和数据的表达、学习、归纳的理论方法.在对粗集理论的一些算法研究后,提出了用其解决电信企业中大量数据中获取的较优决策,为企业信息系统的决策支持提供新的解决方法.     

中部地区有色金属产业发展的思考

通过对中部地区有色金属产业资源现状、发展现状的分析，剖析存在的问题、产业优势和机遇，提出发展建议。     

Gel Point of Whey and Egg Proteins Using Dynamic Rheological Data

The gel point temperatures of coagulation type proteins and gelation type proteins were determined by extrapolating the rapidly rising phase of the storage modulus G’back to the temperature axis. The gelation onset. temperatures of the concentration-independent proteins oval-bumin, ovotransferrin, and BSA were 81°C, 62°C, and 75°, respectively, Gelation of whey protein isolate and egg white gels, both concentration-dependent, was presumably due to disulfide bonds formed by the interactions of the concentration-independent proteins: α-lac-talbumin and β-lactoglobulin, and ovalbumin and ovotransferrin, respectively. Moreover, the incipient gel temperature of whey proteins decreased when the concentration of whey proteins increased.     

塔里木盆地满西地区石炭系层序地层与沉积体系分析

根据层序地层学的基本原理,综合利用露头、钻井、测井和地震资料,以层序体系域边界特征为划分依据,将塔里木盆地满西地区石炭系划分为6个沉积层序,并确定了低位、海进、高位体系域的发育情况。研究区石炭系沉积于陆棚区,主要发育河流、滨岸、浅海陆棚、浅水碳酸盐岩、扇三角洲、海岸平原、泻湖、碳酸盐岩与碎屑岩混合等8种沉积体系。低位体系域以发育河流沉积体系为特征,海侵体系域发育有浅海陆棚、浅水碳酸盐岩、海岸平原、碳酸盐岩与碎屑岩混合沉积体系,除河流沉积体系外,其它7种沉积体系在高位体系域中均有发育,研究区主要储集砂体分布于高位体系域的滨岸沉积体系中。      

固体表面之间接触热阻的辨识研究

介绍了接触热阻的测量原理和传统的实验装置。从接触界面热耦合的角度，结合传热方程的数值解法和参数辨识方法，对实验数据进行整理。通过与文献中数据的对比，说明本方法的可行性。此方法对热物性变化较明显的实验，更能体现出优越性。