基于增强学习算法的插电式燃料电池电动汽车能量管理控制策略

以一款插电式燃料电池电动汽车(plug-in fuel cell electric vehicle，PFCEV)为研究对象，为改善燃料电池氢气消耗和电池电量消耗之间的均衡，实现插电式燃料电池电动汽车的燃料电池与动力电池之间的最优能量分配，考虑燃料电池汽车实时能量分配的即时回报及未来累积折扣回报，以整车作为环境，整车控制作为智能体，提出了一种基于增强学习算法的插电式燃料电池电动汽车能量管理控制策略.通过Matlab/Simulink建立整车仿真模型对所提出的策略进行仿真验证，相比于基于规则的策略，在不同行驶里程下，电池均可保持一定的电量，整车的综合能耗得到明显降低，在100、200和300 km行驶里程下整车百公里能耗分别降低8.84%、29.5%和38.6%；基于快速原型开发平台进行硬件在环试验验证，城市行驶工况工况下整车综合能耗降低20.8%，硬件在环试验结果与仿真结果基本一致，表明了所制定能量管理策略的有效性和可行性.      

电机驱动型矿山运输设备运行速度比优化设计

电机驱动型矿山运输设备需要实现速比优化设计,促使电机能耗得到降低。本文对矿山运输设备性能参数及其匹配设计问题展开了分析,提出采取粒子群算法和遗传算法分别实现速比优化设计。在加权工况条件下追求平均能耗最小,能够使电机在多数工况下的能耗降至最低。     

安全制动器在200T冶金铸造起重机中的应用

碳钢薄板厂钢水接收跨四台200 T冶金铸造起重机主钩控制主要为定子调压调速器转子切电阻控制。整车采用西门子S7-300 PLC系统控制,主钩安全运行关键部位为一套定子调压调速器控制两台电机同步运行。原车设计存在安全隐患,为了消除安全隐患保证设备稳定运行在主钩电机侧与卷筒侧加装速度检测装置,同时在卷筒部位新增安全制动器,保证设备在异常状况下安全停车避免重大事故发生。     

热轧钢筋矫直机剪切系统改进

因GT8/16数控钢筋矫直机飞剪减速器内传动齿轮副损坏频繁以及伺服控制器和伺服电机烧损严重,造成两台数控盘条矫直机无法正常运行。针对这些问题,做了以下改进:改变目前飞剪传动方式,剪切电机采用直流调速电机,剪机的上下剪刃重合量和侧向间隙可进行调整,将原电机、减速器和剪机之间的悬臂法兰联接改为鼓形齿联轴器联接,并增加稀油润滑设备。改进后的设备运行平稳可靠,故障率大为降低。     

LG110H冷轧管机加料装置改进

根据对LG110H轧机以往使用状况的分析、结合目前实际使用情况,将LG110H冷轧管机原电机带减速器驱动装置改进为液压马达驱动装置,使得轧机的加料小车具有更好的可靠性、稳定性和易维护性,;且取消了原有装置的电机与减速器的刹车装置以更加节约能源;由以前的大体积布置安装改进为一体式安装以更加节约空间;在动力上以液压作为驱动能源(使用原有的液压站)替代现有的电能源,使设备结构紧凑、能耗更低。     

PS转炉传动装置蜗轮副跑合方案设计与实践

笔者通过对多台建设期和运行故障处理期的大型PS转炉的传动装置专用减速器蜗轮副跑合运行过程数据进行分析和总结,设计了一种简洁的蜗轮副跑合方案,并分析了跑合过程和跑合结果。结果表明该跑合方案可以解决在安装后作业现场不能严格按照理想载荷递增的要求进行跑合的难题,即不用进行空载和分别以25%、50%、75%、100%的额定载荷运转的理想状态下的完全跑合,专用减速器就能够从"出厂状态"过渡到"使用状态",同时,笔者给出了跑合过程和后期运行技术管理的注意事项,其能预防和解决蜗轮副过早出现异常磨损的故障。通过多台转炉专用减速器长时间运行验证,该跑合方案设计可靠,可供同行借鉴。     

闸阀挡渣工艺技术在安钢150t转炉上的应用

为满足冶炼超低磷钢等高附加值钢种的需要,安钢在第二炼轧厂3号150 t转炉上引进了闸阀挡渣工艺技术.介绍了该闸阀挡渣系统的工艺、设备组成、使用情况,以及存在的问题及其解决措施.实践表明,该挡渣系统运行稳定,挡渣系统使用率达到98%,基本达到了其设计的功能要求.在出钢过程中最大限度地减少了下渣量,平均每吨钢中带渣不超过2.7 kg,挡渣效果较好,为今后冶炼高附加值品种钢奠定了基础.     

闭式冷却塔风机电机系统节能改造

针对新钢第一炼钢厂连铸结晶器软水冷却系统存在能耗高且设备故障频繁出现的问题,对冷却塔内的风机电机重新进行了选型,将原电机连杆传动的带动方式改为电机直接带动方式,并取消了原设计中的所有传动部件。改造后的冷却系统运行稳定,运行成本明显下降。     

电动汽车用高功率密度集成控制器研究

不管是纯电动、混合动力还是燃料电池汽车,电机驱动系统需求都应该满足高功率密度、高效、高可靠性和低成本的要求,为了满足这些要求,电动汽车多采用永磁同步电机和高功率密度集成控制器.文章总结了中国自1996年以来电动汽车,特别是其电机驱动系统的发展,提出了高功率密度集成控制器的研发,重点阐述其控制器的性能设计、变工况母线支撑电容设计以及叠层母排设计.试验表明使用2个220μF膜电容并联的控制器能够驱动80 kW的电机,其功率体积比达到13.3 kW/L,系统最大效率达到92%.     

KKK风机变频改造的应用与实践

江铜集团贵溪冶炼厂硫酸四系列二氧化硫风机于2011年投运,设备在使用中存在两个问题:一是主电机直接启动对系统的冲击;二是采用前导叶风量调节方式所带来的能耗问题。此次改造设计采用中压变频系统驱动风机主电机,以变频调速为主,前导叶配合为辅的方式来控制风机风量,在避免启动冲击的同时,减小运行能耗,达到节能降耗的目的。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

显微维氏硬度测量不确定度评定

对显微维氏硬度测量不确定度进行评定，建立了不确定度计算的数学模型，确定了影响实验结果的各项因素，计算出了各因素的标准不确定度，得出结果的扩展不确定度，并给出最终测量结果的表达式。     

Concept of freedom of infection of animal flocks

Totally negative results of epidemiological investigation of random samples do not prove the absence of the infection as the pathogen may be restricted to only a few animals in the herd for a long time. The statement "absence of infection" is critical for such situations. The question is raised, whether the statement "absence of infection" should be generally avoided. Classification of herds and flocks according to the prevalence of the pathogen would be more valid for the implementation of control measures.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.