[工程应用]智能制造场景的5G应用展望

为满足智能制造领域物联网当前发展的需求，研究了相应制造场景的5G应用技术。介绍了5G的关键技术，包括5G支持的应用场景、网络切片、网络功能虚拟化（NFV）/软件定义网络（SDN）、多接入边缘计算、设备对设备通信技术等；给出了基于扩展的信息物理系统5层框架，基于该框架分析了多个智能制造场景的5G应用（包括人机界面和生产信息技术、流程自动化、工厂自动化、物流和仓储、设备监控和维护等）；给出了以上应用的5G边缘计算开发框架，以集成上述场景；探讨了5G应用于智能制造场景所面临的多个挑战，以助于5G使能智能制造的落地应用。     

建筑隔震橡胶支座用低模量高阻尼胶料的研究

对建筑隔震橡胶支座用低模量高阻尼胶料进行研究。结果表明：选用粒径小和比表面积大的炭黑、增大炭黑用量以及增大增粘树脂用量有利于降低胶料的剪切模量；为保证胶料的剪切模量介于0.3～0.5 MPa之间，胶料需加入一定量的增塑剂。     

负载羧基化球状介孔纳米颗粒TFN膜的研究

在薄层复合膜(thin-film composite membrane, TFC膜)中引入无机纳米颗粒，形成薄层纳米复合膜(thin-film nanocomposite membrane, TFN膜)，近几年作为反渗透膜开始应用于水处理研究。但是无机纳米颗粒在TFC膜中的性能的不稳定性和膜的机械强度等变成了突出问题。合成制备了粒径约为110 nm修饰羧基的介孔氧化硅球状纳米颗粒(MSN—COOH)，并将其成功地化学键合在TFC膜的表面功能层交联网络中。与TFC膜相比，键合有MSN—COOH的TFN膜，水通量提高了56.2%，保持高脱盐率；由于单分散介孔纳米颗粒表面亲水官能团的引入，使膜表面的亲水性有很大程度提高，单分散介孔纳米颗粒在基体中的有序排列，使膜表面粗糙度降低，提高了膜的抗污染能力。与普通TFN膜相比较，具有更好的稳定性和柔韧性，可以在长时间高压过滤操作下保持稳定。     

SO2高温风机频繁跳车原因分析和处理

详细介绍了某300 kt/a铜冶炼工程SO2高温风机发生多次因润滑油压波动导致的跳车情况。对5次跳车故障进行了故障排查及原因分析,最后确定引起油压信号虚假波动的原因在于油压信号传输电缆,更换后故障排除。为类似故障分析和处理提供了经验。     

Achievable working range for solid all-desiccant air-conditioning systems under specific space comfort requirements

Solid desiccant air-conditioning systems present a promising solution, in terms of performance level and environmental protection, pointing out their potential to be coupled with thermal solar or waste heat energy source. Nevertheless, these systems are characterized by constraints to the load they can satisfy, through the trade-off between the dehumidification cooling capacity and the latent load of the conditioned space. On that level, one has to note that, for steady environmental conditions, the conditioned space does not present unique value of load, but range of load, corresponding to an array of acceptable temperature and (usually relative) humidity values. In this work a methodology is proposed for the definition of the system's achievable working range under specific set of space (comfort) requirements. Through this approach, the systems present greater potential for covering the space requirements, thus presenting more possibilities on a design basis, and more flexible control strategies, as well. The proposed methodology is presented and discussed through the case study of a solar desiccant air-conditioning system coupled to a typical residential building.     

复合绝缘子及金具抗风性能本质提升方法

风沙灾害带来的输电线路故障中线路绝缘子风偏、连接金具磨损等问题尤为突出.笔者从复合绝缘子伞裙和金具两方面展开抗风性能本质提升方法研究.首先在复合绝缘子伞裙部分研究引入新型高聚物环氧材料,开展了材料选型和改性研究,具备优异电气绝缘性能、耐老化性能和较高的机械性能,有效解决大风沙尘对复合绝缘子伞裙的损伤难题.然后对于绝缘子金具,采用添加抗磨损涂层的方式提升机械性能.通过溶胶-涂覆法在抛光后的金具表面制备保护型涂层,以Al2O3为主要涂层,ZrO2为改善层,制备了同层数的复合涂层,研究了ZrO2对金具表面Al2O3涂层微结构的影响,在金具表面形成致密且平整的涂层.研究结果表明,通过对绝缘子伞裙和金具的整体设计与材料研究,有效提升了复合绝缘子抗风抗磨损性能.     

Stochastic geometry of network of randomly distributed moving vehicles on a highway

Vehicular ad hoc networks (VANETs) have become an extensively studied topic in contemporary research. One of the fundamental problems that has arisen in such research is understanding the network statistical properties, such as the cluster number distribution and the cluster size distribution. In this paper, we analyze these characteristics in the case in which vehicles are located on a straight road. Assuming the Rayleigh fading model and a probabilistic model of intervehicle distance, we derive probabilistic distributions of the aforementioned connectivity characteristics, as well as distributions of the biggest cluster and the number of disconnected vehicles. All of the results are confirmed by simulations carried out for the realistic values of parameters.