High-efficiency red electroluminescence from europium complex containing a neutral dipyrido(3,2-a:2′,3′-c)phenazine ligand in PLEDs

In order to obtain high-efficiency monochromatic red emission in polymer light-emitting devices, a tris(dibenzoylmethanato)(dipyrido(3,2-a:2′,3′-c)phenazine) europium [Eu(DBM)₃(DPPZ)] doped single-emissive-layer devices were fabricated using a blend of poly(9,9-dioctyl-fluorence) and 2-tert-butyl-phenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix by solution process. Significantly improved electro-luminescent properties with sharp red emission at 611.5 nm were displayed in the Eu(DBM)₃(DPPZ)-doped devices at dopant concentrations from 1 to 8 wt.%. The highest luminance up to 1783 cd/m² at 2 wt.% dopant concentration, as well as the maximum external quantum efficiency of 2.5% and current efficiency of 3.8 cd/A were obtained at 1 wt.% dopant concentration.     

分布式网络中基于隶属云的信任模型研究

本文根据主观信任的主观性、模糊性以及随机性特点,基于隶属云理论提出了适合于电信系统中分布式信任模型。     

Cantor分形R分集分层介质的逆散射方法

Cantor分形R分集分层介质是一种自相似结构,这种结构在光学、量子力学领域很可能有重要应用。本文根据时域信号流图技术研究这种分形结构的逆散射方法,即利用已知的反射系数谱重建Cantor分形的维数及其自相似结构。文中给出了具体重建实例。     

平原与山区油田地面工程设计的不同特点

山区的地质环境远比平原地区复杂,山区自然灾害对油田地面工程的威胁也比平原地区大得多。本文以胜利油田鑫联联合站和延长油矿刘坪集油站为例,分别对两站的工艺流程、平面布置以及管道设计等方面,进行了详细对比。阐述了平原与山区油田地面工程设计的不同特点,以及如何利用其特点进行优化设计。     

Agent-enhanced Workflow

In agent-enhanced workflow, a community of intelligent, distributed and autonomous software agents is used to improve the management of business processes under the control of a workflow management system. These improvements are achieved by allowing the software agents to negotiate with each other to establish contracts that govern the distribution of work across a number of processing centres. Furthermore, the agents collaborate to perform real-time exception handling, and to co-ordinate the redistribution of work items to meet changing circumstances.     

新的地域并网式太阳能发电系统的电力经济分析与设计

提出一种新的地域并网式太阳能发电系统，即带有电力存储系统的地域并网式太阳能发电系统。从电力的有效利用、经济性的角度对这种新的地域并网式太阳能发电系统进行了研究，提出了系统的设计以及选定电力存储系统存储容量的方法，然后针对不同的条件选择了相应的电力存储系统的容量。     

提高直接染料卷染纯棉防羽布耐晒牢度的途径

对棉防羽绒布卷染时，为提高日晒牢度，对各种直接染料进行筛选，并通过多种方法如固色、接枝等谋求提高日晒牢度。最后确定合理选用染料和工艺中提出合理要求。     

OFDMA及其在IEEE802．16-2005中的应用

正交频分多址（OFDMA）是以正交频分复用（OFDM）调制为基础的新一代多址技术,具有很高的带宽利用率。文章介绍了它的基本原理,然后简单介绍了它在移动宽带无线接入中的应用,主要是关于信道编码,链路自适应技术,多天线技术。