基于曲率模态和柔度曲率的结构多损伤识别

以曲率模态和柔度曲率为识别参数，针对具有多损伤区域的悬臂梁结构进行了损伤仿真分析结果表明可以应用曲率模态法和柔度曲率法对梁类结构进行多损伤识别。柔度曲率法既有较高的灵敏度又避免了使用原结构的模态参数，这对没有原始结构模态参数的损伤识别技术显得尤为重要，而且仅需要低阶模态信息即可获得很好的识别效果。     

CDMA通信系统多址干扰的仿真研究

为了研究cDMA通信系统的多址干扰，本文利用Matlab提供的可视化仿真工具Sireunnk建立了CDMA通信系统仿真模型，详细讲述各模块的设计及参数设置，并对仿真结果进行分析。结果表明，多址干扰是CDMA系统的固有干扰，当同时通信的用户数增多时，多址干扰电平增大，导致系统的误码率也增大。因此，多址干扰是CDMA通信系统本身存在的自我干扰，它限制了蜂窝系统的通信容量。     

电化学调控法抑硫浮选的研究

进行了电化学法抑硫浮选的研究，探索了化学试剂法和外控电位法对细粒煤浮选脱硫的影响，通过试验证实，在低的矿浆电位下，黄铁矿能被有效抑制，提高了脱硫效率，它是一种经济有效、简单而无污染的抑制黄铁矿的新方法．     

横流中多孔射流浓度场的特性

采用标准的ｋ－ε湍流模式，结合混合有限分析法预报了横流中多孔射流的浓度场特性，其成果是合理的．对废水排江扩散器的水力设计有参考意义．     

一种格形VSAT网络多址协议分析

主要讨论了格形ＶＳＡＴ网络多址协议的选择，利用排队和仿真的方法分析了ＭＦ－ＴＤＭＡ多频时分多址）的吞吐量和延时性能，并和ＴＤＭＡ多址方式进行了比较，旨在多用户、稀业务量的情况下ＭＦ－ＴＤＭＡ比ＴＤＭＡ具有更好的性能。     

尼龙1010熔体热处理对其热行为的影响

采用DSC方法,通过改变尼龙1010熔体的热历史,观察其在熔区内等温结晶后的熔化行为,并计算了经过热处理的熔体在冷却过程中的非等混结晶动力学参数。提出尼龙1010熔体在熔区内等温结晶后的多重熔化峰表征等混过程中形成的晶体的熔化。并认为该多重熔化行为与样品分子量相关。文中设计的两种热处理过程均使冷却结晶前的熔体中残留晶核数减少。非等温结晶动力学计算结果支持上述观点。     

在铂催化剂上-氧化碳氧化反应的多定态特性

对铂催化剂上一氧化碳氧化反应的多定态特性进行了实验研究,借助于奇异理论和突变理论,对实验结果进行了分析,找出了系统可能存在的定态数目,并预测出在定态数目不同的操作参数区域内,描述系统状态变量与操作参数的分岔图型式,最后,尝试利用系统的多定态特性识别反应的动力学模型,取得了满意的效果.     

Hydrogen and Oxygen Bubble Attachment to a Bitumen Drop

Air bubble – bitumen attachment is a critical step in the flotation of bitumen from mined oil sand. In this study, single bubble – bitumen drop attachment was observed directly using a novel experimental technique. Induction time is determined and used as an indication of bubble‐bitumen attachment potency for both hydrogen and oxygen bubbles. The attachment tests were conducted in deaerated municipal water (City of Edmonton tap water) at temperatures ranging from 22–50°C. Induction times measured for hydrogen bubble attachment were shorter than those for oxygen bubbles. Coalescence tests were also conducted in the absence of bitumen, and showed that hydrogen bubbles coalesced more rapidly than oxygen bubbles in both deaerated municipal water and clear (solids‐free) process water.     

Upgrading a rutile concentrate produced from Athabasca oil sands tailings

A rutile concentrate recently produced by Lakefield Research Ltd and Syncrude Canada Ltd from athabasca oil sands tailings was characterized and attempts were made to upgrade it to market-grade. The rutile concentrate contained 75.5% TiO₂, 18.7% Fe₂O₃, 1.03% Al₂O₃, 1.94% SiO₂, and 563 ppm Th+U. The amount of rutile (anatase) in the concentrate was estimated to be about 10-17%, and the remaining TiO₂ came from ilmenite in various altered forms. Magnetic separation could remove the Fe from the concentrate but it increased the SiO₂ content from 1.94 to 6.01%. A reverse flotation process was developed to remove the SiO₂. Although the fine dissemination of SiO₂ in the rutile matrix limited the removal of SiO₂, the upgraded rutile concentrate, containing 87-89% TiO₂, could be used as a feedstock to the chloride titanium pigment processes.