Process improvement in healthcare: overall resource efficiency

This paper aims to develop a unifying and quantitative conceptual framework for healthcare processes from the viewpoint of process improvement. The work adapts standard models from operation management to the specifics of healthcare processes. We propose concepts for organizational modeling of healthcare processes, breaking down work into micro processes, tasks, and resources. In addition, we propose an axiological model which breaks down general performance goals into process metrics. The connexion between both types of models is made explicit as a system of metrics for process flow and resource efficiency. The conceptual models offer exemplars for practical support in process improvement efforts, suggesting to project leaders how to make a diagrammatic representation of a process, which data to gather, and how to analyze and diagnose a process's flow and resource utilization. The proposed methodology links on to process improvement methodologies such as business process reengineering, six sigma, lean thinking, theory of constraints, and total quality management. In these approaches, opportunities for process improvement are identified from a diagnosis of the process under study. By providing conceptual models and practical templates for process diagnosis, the framework relates many disconnected strands of research and application in process improvement in healthcare to the unifying pursuit of process improvement. Copyright © 2011 John Wiley & Sons, Ltd.     

Synthesis and optical properties of green to orange tunable garnet phosphors for pcLEDs

Y_3−xLu_xAl₃MgSiO₁₂:Ce³⁺ phosphors were prepared by aqueous sol-gel technique. Samples with 0.25, 0.5, 0.75 and 1 mol-% of Ce³⁺ were fabricated and characterized by powder X-ray diffraction (XRD), photoluminescence (PL) spectroscopy, and temperature dependent luminescence to reveal the thermal quenching. Moreover, luminous efficacies (LE), CIE 1931 color points and quantum efficiencies (QE) were calculated and discussed. XRD patterns confirmed the presence of single phase garnet for all samples independent of Ce³⁺ concentration and Y/Lu ratio. Phosphors showed broad band emission in the range 500-750 nm. The emission maximum shifts from 555 to 585 nm depending on the Ce³⁺ concentration and Y/Lu ratio. Quantum efficiency of the phosphors decreased with rising Ce³⁺ concentration and increased with increasing Lu content.     

一种可实现不平衡量快速测试的带通滤波器

针对全自动电机转子动平衡机中的不平衡量测试效率问题,设计了八阶有源带通滤波器,将其与二阶有源高通滤波器及窄带跟踪滤波器进行了实验比较。结果表明二阶有源高通滤波器在采样周期数较高时有很好的测试精度,可用于测试精度要求高,但测试效率没有要求的场合;窄带跟踪滤波器的重复精度较差,只能用于一般的平衡测试机;八阶有源带通滤波器具有较高的测试精度、测试重复性和测试效率,达到了日本同类机器的“幅值±3mg、相位±1º和5秒/次的测量时间”的测试水平     

600MW发电机组凝结水系统变频改造及经济性分析

阐述了华电包头电厂凝结水泵变频改造的方案,通过对凝结水泵节能技术改造的实施,对改造后运行方式及经济性做了详细的分析,为同类型机组实施凝结水节能技术改造提供了科学依据和宝贵经验。     

磁控溅射制备ITO薄膜光电性能的研究

采用直流磁控溅射方法在玻璃基底上制备了ITO薄膜.分别用分光光度计和四探针仪测试了所制备ITO薄膜在可见光区域内的透过率和电阻率,研究了溅射气压、氧氩流量比和溅射功率三个工艺参数对ITO薄膜光电性能的影响.研究结果表明,制备ITO薄膜的最佳工艺参数为:溅射气压0.6 Pa,氧氩流量比1:40,溅射功率108 W.采用此工艺参数制备的ITO薄膜在可见光区平均透过率为81.18％,薄膜电阻率为8.9197×10-3Ω·cm.     

Bi-Te-Se热电薄膜的电化学沉积

在含有Bi 3＋、HTeO2＋、Se4＋离子的水溶液中通过电化学方法实现了Bi2Te3-ySey热电薄膜沉积,研究了电沉积Bi2Te3-ySey的阴极极化曲线及热电薄膜的生长过程,通过电子显微镜（SEM）和能谱仪（EDS）等手段对热电薄膜进行了形貌、成分分析。结果表明电解液的离子组成、沉积电位对薄膜成分、形貌有较大影响。在-0.07V沉积电位下制备的热电薄膜Bi2Te2.75Se0.95晶粒大小均匀,结构致密。     

钢铁表面氧化锆转化膜的电化学性能及成膜机理

为发展环境友好型表面膜技术,采用浸渍法在45钢表面制备了具有一定耐蚀性能的氧化锆转化膜。用极化曲线研究了转化液主剂Zr^4＋浓度和pH值对膜层耐蚀性能的影响,并优化了成膜条件;采用电位一时间曲线研究了NO3^-浓度对成膜过程的影响;采用扫描电镜（SEM）、能谱、开路电位和电化学阻抗谱（EIS）研究了转化膜的形貌、化学成...     

铕杂EVA透明光转换膜的制备及交联动力学

将乙烯-乙酸乙烯酯共聚物（EVA）和乙酸乙烯酯-丙烯酸铕共聚物（VAA-Eu）的共混物（EVA/VAA-Eu）制成掺杂铕交联型透明光转换膜材料。紫外-可见吸收光谱和荧光光谱分析,表明此材料能将紫外线转换成蓝紫光和红光,作为农膜,可促进绿色植物的光合作用,提高阳光的利用效率。以硫化仪研究EVA/VAA-Eu的交联行为和动...     

铝材表面的自组装成膜新工艺

铝材表面易氧化从而影响后续涂层质量.以有机膦化合物、氨三乙酸和聚环氧琥珀酸为主要原料,采用一步法对铝表面自组装成膜,通过正交试验确定了最佳成膜工艺,将此工艺制得的自组装膜的形貌、性能与传统铬酸盐转化膜比较,并探讨了自组装成膜机理.结果表明:最佳成膜工艺为5.0 mL/L有机膦化合物,5.0 g/L氨三乙酸,2.5 mL...     

锌片表面钛盐转化膜的制备及其性能

为了加强环保,以钛盐代替传统的铬酸盐,采用4．0～5．0g／LTiOS04,40～60mL／LH2O2,4．0～6．0g／L含磷化合物为转化液在锌层表面制备了一层转化膜。采用扫描电镜、EDS能谱分析和中性盐雾试验,分析了转化膜的组成及转化条件对转化膜性能的影响。结果表明：该膜为Zn,O,P,Ti4种元素无定形的结构,绿...