JZ型混凝土搅拌机的电气故障问题

目前,老的JG型混凝土搅拌机正被新一代JZ型混凝土搅拌机所取代。JZ型产品比JG型产品有更好的搅拌质量,更高的生产率,因而受到用户的欢迎。这种搅拌机容量一般较小,普遍被小的工程队和民工队采用。这些用户的使用条件和工地的供电系统不健全。于是,JZ型搅拌机在使用中常发生电气故障。     

热阻和非理想回热对铁电埃里克森制冷循环的Yong经济优化性能的影响

应用有限时间Yong分析法，研究热阻和非理想回热对铁电埃里克森制冷循环的Yong经济优化性能的影响。基于铁电晶体的热力学特性，考虑线性传热规律，得到铁电埃里克森制冷循环的基本优化关系及其他性能参数，所得结论可为铁电埃里克森制冷循环的优化设计和性能改善提供些指导。     

铁磁斯特林制冷机的生态学优化性能

应用有限时间热力学理论,建立铁磁斯特林制冷循环模型,考虑有限速率热传导、回热损失和回热时间等因素,基于铁磁材料的热力学性质,导出铁磁斯特林制冷循环的优化性能,进而研究热阻及回热损失对铁磁斯特林制冷机生态学优化性能的影响,所得结论可为铁磁斯特林制冷机的研制和设计提供理论指导.     

Organic light emitting devices employing non-doped structure

11H(1)-benzopyropyrano(6,7-8-i,j)quinolizin-11-one (C545T) with different thicknesses of 0.05 nm, 0.10 nm and 0.20 nm. For comparing, a doped WOLED was also fabricated, in which C545T and DCM2 are codoped into DPVBi layer to provide blue, green and red emission for obtaining white emission. The maximum luminance and power efficiency of the doped WOLED are 5 765 cd/m2 at 16 V and 5.23 lm/W at 5 V, respectively, and its Commission Internationale de l’Eclairage (CIE) coordinate changes from (0.393 7, 0.445 3) at 5 V to (0.300 7, 0.373 8) at 12 V. When the thickness of the ultrathin C545T layer in non-doped WLEDs increases, the emission luminance increases, but all non-doped devices are in the yellow white region. The device with 0.10-nm-thick C545T has a maximum efficiency of 15.23 cd/A at 8 V and a maximum power efficiency of 6.51 lm/W at 7 V, and its maximum luminance is 10 620 cd/m2 at 16 V. CIE coordinates of non-doped WLEDs with C545T thickness of 0.05 nm, 0.10 nm and 0.20 nm are (0.447 3, 0.455 6), (0.464 0, 0.473 1) and (0.458 4, 0.470 0) at 8 V, respectively. This work has been supported by the Major Project of Science and Technology Office of Fujian Province of China (No.2014H0042), the Natural Science Foundation of Fujian Province of China (No.2015J01664), the Project of Science and Technology Research of Quanzhou in Fujian Province of China (Nos.2013Z125 and 2014Z137), and the 2016 Annual National or Ministries of the Quanzhou Normal University Prepare Research Foundation Project (No.2016YYKJ21).E-mail:lishuangw@126.com      

Enhanced efficiency and brightness in organic light- emitting devices with MoO3 as hole-injection layer

The organic light-emitting devices (OLEDs) using 4,4’,4’’-tris{N-(3-methylphenyl)-N-phenylamin}triphenylamine (m-MTDATA) and MoO3 or 1,3,5-triazo-2,4,6-triphosphorine-2,2,4,4,6,6-tetrachloride (TAPC) and MoO3 as the hole-injection layer (HIL) were fabricated. MoO3 can be expected to be a good injection layer material and thus enhance the emission performance of OLED. The highest occupied molecular (HOMO) of MoO3 is between those of m-MTDATA or TAPC and N,N’-bis-(1-naphthyl)-N,N’-diphenyl-1,1’-biphenyl-4,4’-diamine (NPB), which reduces the hole-injection barrier and improves the luminance of the OLEDs. The current efficiency is improved compared with that of the device without the MoO3 layer. The highest luminous efficiency of the device with 2-nm-thick MoO3 as HIL is achieved as 5.27 cd/A at 10 V, which is nearly 1.2 times larger than that of the device without it. Moreover, the highest current efficiency and power efficiency of the device with the structure indium-tin oxide (ITO)/TAPC (40 nm)/MoO3 (2 nm)/TcTa:Ir(ppy)3 (10%, 10 nm)/ tris-(8-hydroxyquinoline) aluminium (Alq) (60 nm)/LiF (1 nm)/Al are achieved as 37.15 cd/A and 41.23 lm/W at 3.2 V and 2.8 V, respectively.     

寒冷地区配管设计防冻措施

寒冷地区工厂的设备和工业管道在冬季常因温度低导致冻结现象,不仅破坏设备而且影响生产。从设计的角度出发,归纳了石油化工厂内易发生冻结的安装位置,并提出解决方法,同时对石油化工厂的操作提出建议,对实际的配管工作一定的指导意义。     

面向宽带流媒体的接入汇聚路由器中缓冲区容量的选取研究

根据宽带流媒体的突发性和自相似特点及接入汇聚路由器（ACR）对预留宽带的严格控制,建立了用分形布朗运动（FBM）来表示输入流量模型的自相似模型,用其定量分析了ACR中缓冲区容量与分组丢失率的关系。分析结果表明,为支持其有良好服务质量的宽带流媒体业务,必须确保每路视频流的丢失率小于一个定值,在此条件下,所需缓冲压的容量与媒流体的自相似系数及链路平均利用率成正比,在实际工程实践中可以根据系统丢失率的要求计算需要预留的缓冲区容量,以此来保证视频传输的服务质量。     

一类斯特林制冷机的生态学优化准则

研究存在热阻和回热损失的斯特林制冷机的生态学优化准则,得到一些新的性能参数,可为斯特要制冷机的优化设计和最佳工况的选择提供些新理论指导。     

加锑可锻铸铁孕育剂的研究

在可锻铸铁孕育处理剂中应用锑和铝的孕育作用，配以适当的铅，研制成功了Ｐｂ－Ｓｂ－Ａ１型孕育剂。通过大量试验证明：在常规可段铸铁化学成份范围内，ＰｂＳｂ－Ａ１型孕育剂孕育效果稳定，能够保证中等壁厚的可锻铸铁件获得全白口组织，对固态石墨化过程没有不利影响，可使主要机械性能指标略有提高；一般情况下可替代现生产中使用的较昂贵的铀孕育剂。     

CO焚烧炉设计注意事项

介绍了催化裂化装置含CO再生烟气的处理方式,讨论各种处理方式的应用场合及优缺点;并结合格尔木炼油厂改造过程中CO焚烧炉设计工作,分析了再生烟气中CO的焚烧机理和对启燃温度的要求。根据现场出现的问题提出,针对CO焚烧炉设计过程中应注意的燃烧器布置、燃烧时间控制、炉膛压力分布、防止燃烧器熄火以及焚烧炉和余热锅炉统筹考虑等诸多事项,对催化裂化装置内CO焚烧炉的设计工作具有指导意义。