Experimental campaign and assessment of a complete 240-kW Proton Exchange Membrane Fuel Cell power system for maritime applications

This work shows the results of the experimental assessment of the HI-SEA joint laboratory between Fincantieri, the main Italian shipbuilder, and the University of Genova. The HI-SEA system is a 240 kW real-scale test rig complete of auxiliaries, made up of 8 Proton Exchange Membrane Fuel Cell stacks installed on two parallel branches, which can operate independently or in parallel by means of two dedicated DC/DC converters. The experimental assessment is performed by considering: (i) Stationary performance; (ii) dynamic performance; (iii) a maritime operative profile defined together with Fincantieri. The experimental results obtained in this work demonstrated that the system can successfully respond to static, dynamic, and typical maritime operative load profiles. It was also assessed the ability of the system to work simultaneously with two parallel branches, by means of two DC/DC converters, which represents a clear advantage in terms of load sharing and redundance onboard for security issues. Furthermore, the present study gives important advice and criteria for the design, construction, and control of similar Fuel Cell complete systems for maritime applications, which is particularly relevant considering that experimental studies on complete Fuel Cell systems is still limited.     

基于C/S模式的体育事业统计年鉴信息系统设计与实现

本文以历年《中国体育事业统计年鉴》中的积累数据为研究对象，通过对各类统计数据表的分析，运用数据库技术和软件工程方法，确定表的结构，建立年鉴数据库；研究运用c#语言设计开发基于网络的c/s模式前端客户端，对数据库进行添加、删除、修改、查询、导出等相关操作，实现对《中国体育事业统计年鉴》数据的网络化管理。     

基于用户权限的综合监控系统报警管理研究

针对综合监控系统中人机界面用户权限和报警管理的差异化需求，设计并完成了基于用户权限的报警管理功能，实现了用户权限与报警信息的集中管理，并取得了良好的应用效果。     

Predictions of frame compliance and apex morphology in sharp nanoindentations

If all components in a nanoindentation system are well calibrated and a reference material has unique hardness, H and reduced modulus, E_r independent of the indentation depths, the load, L and the penetration depth, h in the indentation loading curve of the reference material can be correlated by L=Kh². Here the constant K is expressed by H, E_r and indenter geometry constants. By using H and E_r of a fused silica and the Berkovich geometry, an analytical expression for the indentation loading curve could be derived. To compare with this analytical loading curve, experimental indentation data were measured with two commercial nanoindenters. The experimental loading curves shifted leftward or rightward from the analytical loading curve and this depth deviation was attributed to improper calibration of the nanoindenters. Quantitative calibrations of frame compliance and indenter bluntness were tried for the raw nanoindentation data and this resulted in consistent nanoindentation data regardless of the used nanoindenters.     

我国工业设计职业资格评定体制研究

文章从我国设计类职业资格认证制度的发展及现状中总结我国工业设计职业资格认证的不足。井从我国工业设计师职业资格评定的一般模式及特点出发，提出构建我国工业设计师职业资格评定体制的构想。     

合成化学课程本科教学体系的选择与实施简

结合淮南师范学院化学与化工系近年来开设的合成化学课程,探讨了合成化学课程对化学各专业的选择,合成化学课程教学体系应遵循的原则,合成化学课程教学内容及合成化学课程教学组织与实施。     

川西岩性气藏实时井位部署系统研究

川西地区侏罗系岩性气藏是目前最主要的勘探开发领域,高精度三维地震勘探是支撑岩性气藏井位部署的关键技术,实时的将地震资料与地面地质条件结合建立探井实施部署系统是勘探工作者长期追求的目标。通过对川西地区侏罗系岩性气藏井位部署方法的长期研究,认为建立地震与地形地物基础数据库、地震资料精细解释与实时应用、GPS的有效应用是高效井位部署的关键技术。研究成果支撑了川西地区探井的部署,对于其他地区的高效井位部署具有重要的参考价值。     

二氧化碳脱氢系统管道腐蚀原因分析与对策

介绍尿素装置二氧化碳脱氢系统碳钢管道的腐蚀情况,分析腐蚀产生的原因,针对腐蚀原因合理设计管道、优化工艺指标、选用耐腐蚀材料等防护对策,取得了良好的效果.     

基于多重移位复用的轴承健康监测报警存储方法研究

旋转机械正朝着高速化、智能化、高性能方向发展,为及时发现早期故障,需要研发健康监测系统。报警存储用于分析故障原因,是系统核心。针对大多系统报警存储存在缓存时间长度随采样率变化、缓存数据丢失、单次报警等问题,提出一种基于多重移位复用的方法,将多个移位寄存器、队列和循环索引相结合并利用LabVIEW平台实现该方法。实验结果表明,该方法可以自动存储报警前后10 s内所有数据,解决了数据丢失、单次报警等问题。     

基于有限状态机的煤矿辅助运输转载自动化控制研究

为实现辅助运输过程中转载容器装载和转载工作的少人化、智能化,提出一种采用煤矿辅助运输转载机器人实现容器自动化转载的控制方案。概述煤矿辅助运输转载机器人组成及工作原理,分析机器人转载过程,确定了辅助运输转载自动化需要对单轨吊车、转载机械臂、平板车、锁具的工作时序进行控制,在MATLAB中建立系统状态机,将单轨吊车、转载机械臂、平板车、锁具作为子系统,系统状态机根据用户指令结合当前各子系统的状态,协同控制各个子系统的工作时间和顺序,保证了煤矿辅助运输转载的安全进行;最后在ROS中建立辅助运输转载仿真环境,通过系统状态机控制机械臂进行多次抓取实验,实验结果表明转载容器在20次不同位置抓取实验中,抓取成功率均在80%以上。