The Effects of Experience and Strategy on Visual Attention Allocation in an Automated Multiple-Task Environment

Operators and users interacting with computer environments often have to deal with multiple tasks at once, responding to each in series. Diagnostic automation, that is, automation that alerts users when and where to look, has been suggested to support the unique challenges of multiple task environments: activating tasks, switching between tasks, and tasks interfering with each other. Automation is not always reliable, however. Because of the common interaction with novel systems and the importance of training, the Simultaneous Task Environment Platform program—a multiple-task environment—was developed to understand the effects of experience on interaction with these automation-supported systems, as well as what strategies were developed. It was found that participants became more efficient with experience only when they interacted with higher reliability automation. Furthermore, the strategies participants developed focused on the differences between tasks and patterns across those tasks. Automated systems training should be sure to employ these findings.     

粉煤灰制备沸石负载氧化铜处理酸性大红GR废水

以粉煤灰为原料,用碱熔-水热合成法制备沸石并负载氧化铜处理酸性大红GR废水。采用正交试验法考察了m（灰）/m（碱）比、m（灰）/m（水）比、煅烧温度和晶化时间对出水中色度和COD指标的影响,并确定了沸石制备的最佳工艺条件为m（灰）/m（碱）比1.2：1、m（灰）/m（水）比1：9,焙烧温度500℃和晶化时间10 h。将最佳条件下制备的沸石负载氧化铜并与过氧化氢联合催化氧化处理酸性大红GR废水,获得了满意的结果：出水中色度和COD指标达到25（稀释倍数）和105 mg.L-1,分别低于纺织染整工业污染排放标准GB 4287—92规定的一级和二级排放标准。制备的沸石经XRD表征,确定为NaA型沸石相。     

Purification and characterization of extracellular chitinase from a novel strain Aspergillus fumigatus CS-01

Twelve samples derived from different locations in south central area of China are treated by enrichment and spread-plate technique for initial screening. Seven chitinase-producing strains are isolated. The chitinase present in the culture supernatant of strain CS-01 possesses the maximum activity of 0.118 U/mL. Analysis of the morphological feature and the ITS rDNA sequence reveals that strain CS-01 belongs to Aspergillus fumigatus. Production of the chitinase is regulated by a inducible way and the maximum activity appears at 36 h in colloidal chitin culture. Purification of the chitinase is carried out by salting out, gel filtrate chromatography and anion exchange chromatography sequentially. Native-PAGE and SDS-PAGE indicate that the chitinase from A. fumigatus CS-01 is a monomer with the relative molecular mass estimated to be 4.50×10⁴. Its maximum activity appears at pH 5 and 55 °C. The chitinase is stable at pH 4.0–7.5 and below 45 °C. Foundation item: Projects(50621063, 50674101) supported by the National Natural Science Foundation of China     

高校自动排考系统设计与实现

针对目前高校考务管理的现状,分析了自动排考系统所面临的必要和优化问题.以图论为理论依据,设计了一种能够高效解决这些问题的自动排考算法,并将该算法实现,得到了较好的效果.     

APP/MQ树脂对聚丙烯热分解动力学研究

通过热失重（TGA）测试,研究了不同阻燃剂改性PP的热分解动力学,结果表明阻燃剂APP、MQ树脂的介入能不同程度提高了改性PP的分解活化能,其中APP改性PP活化能可达500 kJ.mol-1,说明阻燃性能的提高可能归因于无卤阻燃剂促成了改性PP分解活化能的提高。     

油井气液两相流全自动计量技术

为解决稠油计量的准确度、可靠性、耐久性及实时在线等问题,设计出一种通过分离伞和液位自动控制调节器来实现气液两相流计量的装置.采用翻斗式称质量机构计量油井产量,消除油中含气造成的假体积误差;采用G法补偿算法消除稠油残留造成的计量误差;采用以计算机控制电动机起停方式的单路导通多通阀实现全自动选井计量.现场实际应用证明,称质量式油井计量技术较好地解决了各类油井的实时在线计量问题,具有自动化程度高、计量精度高等特点.     

一类二阶半线性时滞微分方程的振动准则

建立一类二阶半线性时滞微分方程的几个振动准则.利用一个新的方法,得到所有解振动的一些充分条件,新的结论改善和推广了一些相关文献的振动准则,给出的例子用来阐明新的结论.     

吸收对准相位匹配线性电光效应的影响(英文)

研究吸收对准相位匹配线性电光效应的影响,得到适用于吸收介质的准相位匹配线性电光效应的耦合波方程及其解析解.计算结果表明,吸收不但削弱光的强度,且影响o光与e光之间的电光耦合.当o光与e光的吸收系数不同时,由于它们之间的电光耦合,总输出光强随外加电场变化而变化.研究结果可用于吸收介质的电光器件设计.     

复合中间合金对铝合金机械性能的影响

以工业纯铝（L2）为基础,添加不同百分含量的合金元素Re、Al-Ti-B与Al-X等,以及选择适当的热处理工艺措施,对其所引起的机械性能、导电性能的变化进行了研究,旨在寻求一种新的复合中间合金材料替代原来各合金元素单独加入,从而获得导电性较好,强度较高的铝合金电脑散热片材料．研究结果表明：当加入的复合中间合金中Re、Al-Ti-B与Al-X比例为1：3：1时,其效果最佳．     

区域对接的多目标决策模型研究

在系统目标分析的基础上,提出了系统的模型体系结构,确定了区域对接模型的目标、决策变量,及约束条件;根据模型要达到的不同日标,分别建立了3种发展方案.该模型可较好地反映局部与整体协调发展的制衡关系,为区域对接的定量研究提供了基础.