Photoluminescence of face-centered-cubic structure silicon nanoparticles deposited by pulsed laser ablation

Face-centered-cubic(fcc) structure silicon nanoparticles(Si-nps) are synthesized by using nanosecond pulse excimer laser ablation of Si target in Ar ambient.The nonequilibrium environment caused by the plume confined in argon ambient gas is responsible for the formation of fcc Si-nps.Photoluminescence(PL),transmission electron microscopy,and X-ray photoelectron spectroscopy are used to characterize these Si-nps.Broad PL spectrum is obtained with a double-peak at 403 and 503 nm by an exciting laser of 325 nm...     

Unscented Kalman filtering in the additive noise case

The unscented Kalman filter(UKF) has four implementations in the additive noise case,according to whether the state is augmented with noise vectors and whether a new set of sigma points is redrawn from the predicted state(which is so-called resampling) for the observation prediction.This paper concerns the differences of performances for those implementations,such as accuracy,adaptability,computational complexity,etc.The conditionally equivalent relationships between the augmented and non-augmented unscente...     

论写作评改中的问题与对策

由于主客观原因,现有大学英语写作评改体制仍存在诸多问题和需要改进的地方,依托国内外学者对这一领域的大量研究,深入探讨如何提高教师和学生评改的有效性问题应是很有价值的,不仅能健全写作评改机制,还能真正提高学习者的写作能力。     

Modeling of multi-inclusion composites with interfacial imperfections:Micromechanical and numerical simulations

A micromechanical approach based on a two-layer built-in model and a numerical simulation based on boundary element method are proposed to predict the effective properties of the multi-inclusion composite with imperfect interfaces.The spring model is introduced to simulate the interface imperfection.These two methods are compared with each other,and good agreement is achieved.The effects of interface spring stiffness,volume ratio and stiffness of inclusions on the micro-and macro-mechanical behaviors of fib...     

急诊科护理人员工作压力调查分析

目的调查分析急诊科护理人员工作压力现状和相关因素。方法采取方便抽样法对22名急诊科护士进行护士工作压力源量表问卷调查,并对不同编制、学历、职称、班次[A班（08：00-15：00）、P班（15：00-22：00）、N班（22：00-08：00）]的急诊科护士的护士工作压力源量表评分进行比较。结果急诊科护士群体排在前两位的压力因素是病人护理方面的问题、工作量及时间分配的问题。不同编制、学历、职称、班次的急诊科护士的护士工作压力源量表评分比较差异有统计学意义（均P〈0.05）,提示急诊科聘用护士、大学本科及以上学历护士、低职称护士以及值P、N班护士的工作压力程度较重。结论护理管理者应根据护士的不同编制、学历、职称、班次有针对性地给予减压措施,减轻影响护士身心健康因素,以提高临床护理工作质量。     

一起110kV电容式电压互感器故障诊断与处理

介绍了1例电容式电压互感器例行试验中数据的异常情况,通过对电容分压器的介质损耗因素、电容量试验数据进行纵横比分析,确定了故障的存在,并用自激法试验找出了故障部位,经解体验证并处理了故障,最后分析了故障原因并提出了预防此类故障的建议。     

高频引弧切割电源的研究

针对目前国内高频引弧切割电源技术进行了深入分析和研究,并对主电源的参数进行设计计算;详细分析了高频引弧电路的工作原理及引弧振荡器的设计方法,给出了切割工艺的详细时序流程。最后通过实验结果,证实该设计达到了预期目的。     

分散控制系统I/O通道分配存在的问题及处理

通过2个实例分析了DCS系统I/O通道分配上考虑不周导致的一些问题,并提出了相应的解决方案。     

“洛阳玻璃”节能降耗潜力及措施

作为能源消耗大户和能源节约潜力大户,洛阳浮法玻璃集团在多个领域积极开展节能降耗实践,实施冷却塔热水泵节能、原料上料系统利用峰谷电价差移峰、生产线煤气炉加富氧燃烧、烟气治理及余热发电项目,采用油气混烧技术等.对玻璃生产相关设备节能技术及效果进行分析评价,并挖掘新的节能潜力.     

CAN总线在废水处理中的应用

介绍在钢厂废水处理站中Premium PLC与现场ATV31变频器通过CAN总线通讯,以实现设备的远程控制,此种通讯方式具有成本低、传榆距离远、可靠性高的特点。