对选矿废水综合利用的探讨

通过对金堆城钼业公司选矿废水再用于选矿作业的选矿试验，证明选矿废水循环利用是可行的，既提高了选矿浓度，又减少了对环境的污染，经济和社会效益显著。     

清梳联纺长绒棉特细号纱应用技术探讨

介绍了清梳联的技术特点，对清梳联纺长绒棉特细号纱的实际应用问题进行了工艺试验及探讨，论证了清梳联纺长绒棉的可行性及取得的效益。     

完备ARRs集的生成方法及传感器优化配置应用

广泛应用于故障诊断和传感器优化、分析、证实的解析冗余关系(Analytical redundancy relations,ARRs)缺乏系统、有效的方法来产生完备ARRs集,为此,提出了一种逐次消元法。该方法以系统元关系(Primary relations,PRs)为基础,通过若干次循环消元过程,生成了完备ARRs集,同时生成了对应的假定特征矩阵(Hypothetical signature matrix,HSM);基于HSM,把传感器优化配置问题映射为一个特殊的0-1整数规划模型,并用分支定界法求解该模型。应用表明,该方法能在不降低故障检测率、隔离率的前提下减少传感器数目,降低了测试代价,对故障诊断中的传感器配置问题有借鉴意义。     

养殖固废再利用的高效磷吸附剂制备与作用机制

以干化牲畜粪便为前驱体,耦合铁盐制备了高性能铁负载型生物炭吸附剂(Fe@C).通过扫描电镜、X射线衍射分析、氮气吸附/解吸以及X射线光电子能谱等分析手段,明确了Fe@C的基础物化性质.该吸附剂用于水中磷酸盐的吸附去除,展现了良好的性能.其最大吸附量达到了85.43 mg/g,可在30 min的接触时间内快速达到吸附平衡,投加量为3(质量比)的情况下,可完全去除水中的磷酸盐.电化学分析表明,Fe@C具有良好的化学稳定性;X射线光电子能谱及原位傅里叶变换全反射红外光谱分析表明,Fe@C表面羟基化以及铁组分水解产物是磷酸盐吸附主要活性位点.研究对西部地区养殖业废弃生物质的有效利用提供了资源化的理论依据,具有显著的指导意义.     

组分对发射盐物相、浸渍温度和稳定性的研究

311、411、612、2.4：0．6：1是常用的阴极钪酸盐（Ba：Ca：Al2摩尔比，分别添加微量Sc2O3）配比。相同工艺条件，4种配比钪酸盐的衍射峰区别不大；相同温度条件，2．4：0．6：1的阴极钪酸盐对纯钨基的浸渍度最高，达到99．34％；同时24：0．6：1的阴极钪酸盐在空气中的稳定性也是最好的。     

反旋向多漩流器阵列燃烧室流场的数值研究

采用雷诺应力模型(RSTM)对于反旋向多漩流器阵列贫油直喷(LDI)燃烧室的非反应冷态流场进行了数值模拟.研究中采用了一种3×3的漩流器阵列结构,相邻漩流器的旋向交替变化.计算结果表明,所研究的燃烧室流场结构十分复杂.由于相邻漩流器之间对于漩流的强化作用,因而各回流区维持了较长的长度.流场中存在的多个回流区及强湍流表明该燃烧室有潜力实现良好的燃烧性能.通过将雷诺应力模型的模拟结果与LDV实验数据进行比较发现,计算结果与实验值符合良好,说明雷诺应力模型较好地求解了回流区和高速度梯度问题.     

基于暗原色及入射光假设的单幅图像去雾

目的 雾是一种常见的天气状况,针对雾能使图像中的景物对比度降低、表面颜色退化的问题,提出一种基于入射光假设的单幅图像去雾方法。方法 首先利用全局暗原色进行初步去雾,从而使图像透射率处于[0,1]范围内;然后利用雾天光照均匀的特点以及Retinex的照度估计原理进行透射图的估计;最后利用透射图以及初步去雾图像得到复原图像。结果 与He算法、Fattal算法的对比实验结果显示,该算法获得的复原图像细节清晰,颜色自然。与引导滤波优化后的He去雾算法相比,本文算法速度提高了93%。结论 大量对比实验结果表明,本文算法能够显著恢复雾天降质图像,对于薄雾和浓雾同样有效,具有广泛的适用性,且算法原理简单。此外,本文算法也同样适用于灰度图。     

Effect of characteristic scale on the extrudate swelling behavior of polypropylene melt in a micro-extrusion process

The swelling behavior in micro-extrusion has a significant effect on the dimensional and shape accuracy of microproducts. In this study, the effect of characteristic scale, defined as the gap of die land in an annular micro-extrusion die, on the extrudate swelling behavior of viscoelastic melt is analyzed through numerical simulations and micro-extrusion experiments. The results show that the swelling behavior displays an obvious dependence on the characteristic scale. An increase in the characteristic scale reduces the swell ratio and retards the process to reach the equilibrium state. In contrast, a decrease in the characteristic scale results in a larger magnitude of change in velocity field and faster relaxation development of stress field. The location of the maximum velocity layer for the laminar flow gradually deviates from the geometric center of channel toward the wall of mandrel with the increase in the characteristic scale. Moreover, an increase in the flow rate results in a larger swell ratio for a constant characteristic scale. The elastic effect plays a more dominant role than the viscous effect in determining the viscoelastic swell behavior. It is imperative to consider the complicated swelling behavior and remarkable viscoelastic effect simultaneously in micro-extrusion process.     

Trust-based group services selection in web-based service-oriented environments

Multi-agent technologies have been widely employed for the development of web-based systems, including web-based e-markets, web-based grid computing, e-governments and service-oriented software systems. In these service-oriented systems, service provider agents and service consumer agents are autonomous and rational entities, which can enter and leave the environments freely. For simplicity, we use terms ‘provider’ and ‘consumer’ to represent this two types of agents. How to select the most suitable service providers according to a service request from a consumer in such an open environment is a very challenging issue. In this paper, we propose an innovative trust model, called the GTrust model, for service group selection in general service-oriented environments. In the GTrust model, the trust evaluation for a service group is based on the functionality coverage of the group, the dependency relationships among individual services in the group, the ratings of individual services on the attributes of the service request and a similarity measurement of the extent to which reference reports can reflect the service request in terms of the priority distribution of attributes. The experimental results and analysis demonstrate the good performance of the GTrust model on the service group selection in service-oriented environments.