一种分布式对象存储在巡检系统中的研究应用

随着通信技术的快速发展及智能设备的普及,网络规模、网元数量的不断增长,通信设备巡检任务成倍增加,给巡检系统的存储带来了巨大挑战,传统文件存储方式已无法满足要求。通过研究分布式对象存储,基于MinIO设计实现了一种新的巡检系统存储方案,可有效提升系统存储效率和可扩展性。该方案已经在江苏移动实际应用,支撑常态化巡检工作,对于网络运维及管理有较好的参考意义。     

污水处理场4M10-34/78-76型往复式空气压缩机改造

无油润滑是现代成熟的压缩机润滑技术,它节省了能源,简化了工艺流程,提高生产效率,本次4M10-34/78-76型往复式空气压缩机少油润滑改为无油润滑着力于降低设备故障频率,延长设备使用时间,降低检修所产生的费用,降低生产停工产生的损失。     

A review of digital twin in product design and development

In the era of digitalization, there are many emerging technologies, such as the Internet of Things (IoT), Digital Twin (DT), Cloud Computing and Artificial Intelligence (AI), which are quickly developped and used in product design and development. Among those technologies, DT is one promising technology which has been widely used in different industries, especially manufacturing, to monitor the performance, optimize the progresses, simulate the results and predict the potential errors. DT also plays various roles within the whole product lifecycle from design, manufacturing, delivery, use and end-of-life. With the growing demands of individualized products and implementation of Industry 4.0, DT can provide an effective solution for future product design, development and innovation. This paper aims to figure out the current states of DT research focusing on product design and development through summarizing typical industrial cases. Challenges and potential applications of DT in product design and development are also discussed to inspire future studies.     

A procedure for assessing the functional reliability of hospital systems

An effective reliability-based procedure is presented to assess the capability of hospitals to be functional after a seismic event of a given intensity. Every major function in a hospital depends on the joint action of various cooperating services, which in turn are made up from a certain number of sub-services. Such a complex organization is described in terms of a logical scheme and subsequently reduced to a minimal cut-set representation. For each sub-service a collapse criterion is defined, by which the strength is compared to the action load, both represented as random variables. Strengths are evaluated through assessment analyses based on design drawings. Loads are evaluated from 3-D linear dynamic analyses under seismic input. This is given by the Eurocode 8 elastic response spectrum, scaled at a given peak ground acceleration and account for the position of the sub-service within the building. By calculating the failure probability of each service by FORM (First Order Reliability Method) or SORM (Second Order Reliability Methods), the probability of functional interruption is obtained in terms of Didevsen bounds, conditional on a given earthquake intensity. The method helps to single out weak elements and potential sources of damage (structural, non-structural, equipment) within the hospital. This allows: (a) to investigate quantitatively the effectiveness of different upgrading criteria, (b) to select rationally intervention hypotheses, both in the retrofitting and rehabilitation of existing hospitals and in the design optimization of new ones, and (c) to evaluate different investment options for seismic vulnerability mitigation. As an example, an application to a case study hospital is presented.     

对电梯安装调试及试运行阶段问题的探讨

针对电梯调试和试运行阶段中存在的电梯设备防盗、井道封闭、临时电源、现场管理等方面存在的问题，提出了开发电梯设备防盗功能的设想．以及加强现场管理和规范电梯施工的措施。     

反应合成喷涂装置的设计

电弧喷涂是一种重要的热喷涂技术,应用这种技术改变压缩气体的成分进行铝喷涂时,可以获得Al2O3纳米粉体材料.该装置正是为了配合这一试验研究,收集试验中产生的纳米粉体材料而设计的.该装置通过负压抽吸的方法,使产生的纳米粉体吸附在过滤膜上而得到Al2O3纳米粉体材料.通过该装置可以达到试验目的,收集到合格的Al2O3纳米粉体材料.     

The impact of single-phase grid-connected distributed photovoltaic systems on the distribution network using P-Q and P-V models

The gradual emergence of photovoltaic (PV) systems as the most common distributed generation interconnected with the electric power system calls for a detailed power flow analysis with different models especially in the evolving unbalanced active distribution network. This paper is an extension of a previous study carried out on the performance evaluation of a 10 kWp grid-connected PV system deployed in a school, with the grid providing a virtual storage and access to upstream markets. For increased adoption of such systems in the unbalanced distribution network, it is pivotal to understand the mode of operation and the type of connection to the system. This article presents an impact analysis of such utility interactive single-phase PV systems distributed on all the single-phase load nodes of the traditional IEEE-13 bus distribution test feeder. The PV distributed generation (PV-DG) can be modelled as constant P-Q or P-V nodes with varied impacts in power flow studies for the unbalanced active distribution network. Results from these models are compared in terms of their impacts on voltage profiles at load buses, voltage unbalance, equipment loading, power losses and the total number of iterations for a converged power flow solution.     

变压器手动拆卸装置的研究与设计

研究设计了一种变压器手动拆卸装置,主要包括承重滑道、支撑横梁、脚梯、支撑架、固定杆和带式捆绑器等结构。各连接部位采用插接式微调结构和粘贴式带式捆绑器,不仅可以方便地调整元件安装位置,而且省去了螺栓连接等工作。同时对主要承重部件的支撑横梁进行优化设计,运用Ansys Workbench软件建立多种桁架模型,并分析比较得到最优的桁架模型。该设备具有安装拆卸简单快捷、使用方便、占地小的特点,解决了在有限空间内或因其他条件限制而无法使用大型起重机械安装变压器的问题,具有较好的推广应用价值。     

磁流变材料在现代加工设备中的应用

磁流变(MR)材料是一种新型的智能材料,是由载液、表面活性剂、可磁化分散粒子等组成的一种流体。在外加磁场的控制下磁流变装置能够产生连续可控的阻尼力,从而对振动系统的振动性能进行实时控制。它的特性及应用都处于研究和探索阶段,但从初步实验成果来看磁流变材料有着广阔的应用前景,尤其是在减振降噪方面。简要介绍了磁流变材料的特性,归纳了磁流变材料在现代加工设备中的应用现状,展望了磁流变材料在现代加工设备中的应用前景。     

基于FH-AC系统Portal认证的实现与开发

随着当今移动互联网的快速发展,Wi Fi设备成为人们生活当中不可缺少的组成部分,而传统的无线网络在接入稳定性和安全性方面有待进一步提高。为了解决上述问题,设计了基于FH-AC系统的Portal认证系统。该系统通过对原有Portal协议进行改进并且采用Socket/HTTP通信和CHAP认证技术等一系列技术来提升系统性能,使整个系统在使用过程中能够更快更稳定地接入当前无线网络,其系统安全性也得到进一步的提升。