等离子显示器(PDP)用BaMgAl10O17:Eu2+蓝粉的烧结工艺研究

研究了烧结温度、保温时问以及粘结剂对荧光粉二次性能的影响。结果表明，当采用较低烧结温度时，有机粘结剂没有完全分锵是造成荧光粉亮度下降的主导因素，包覆在荧光粉表面的残留部分降低了荧光粉的表面光透率；当烧结温度升高，粘结剂的影响逐渐下降，而过高的烧结温度在导致荧光粉劣化各种因素之间起到了决定性的作用。在此基础上，依据对粘结剂中成膜物质乙基纤维素的降解特性的分析，对浆料烧结工艺进行了优化。结果表明，当浆料加热至480℃，有机粘结剂分解已趋于饱和，从而可以有效降低烧结工序对荧光粉的不利影响。     

退火变脆Fe75Si10B15金属玻璃的脆韧性转变

研究了机械研磨对退火变脆Fe_(75)Si_(10)B_(15)金属玻璃的弛豫过程,晶化行为及脆韧性转变的影响。发现退火变脆的Fe_(75)Si_(10)B_(15)金属玻璃,经不同时间机械研磨,Curie温度T_C逐渐回落,总的弛像焓ΔH_?逐渐回升。在DSC曲线上观察到明显的玻璃转变温度T_(g_1)和一个附加的宽放热峰T_(x_1),随着研磨时间的增加,T_(x_1),T_(x_1),T_C同步降低,与T_(x_1)对应的放热面积ΔH_(x_1)逐渐增大,并在片状粒子表面形成切变带以及与其对应的剪切带,玻璃在退火过程中失掉的韧性逐渐得到恢复。     

THERMAL STABILITY OF THE MECHANICALLY ALLOYED Al－10Ti NANOCRYSTALLINE ALLOY DURING CONSOLIDATION PROCESS

ＴＨＥＲＭＡＬＳＴＡＢＩＬＩＴＹＯＦＴＨＥＭＥＣＨＡＮＩＣＡＬＬＹＡＬＬＯＹＥＤＡｌ－１０ＴｉＮＡＮＯＣＲＹＳＴＡＬＬＩＮＥＡＬＬＯＹＤＵＲＩＮＧＣＯＮＳＯＬＩＤＡＴＩＯＮＰＲＯＣＥＳＳＬｉａｎｇＧｕｏｘｉａｎ；ＬｉＺｈｉｃｈａｏ；ＷａｎｇＥｒｄｅ（...     

Effect of adding methods of metallic phase on microstructure and thermal shock resistance of Ni/（90NiFe2O4-10NiO） cermets

Ball mixing and electroless plating were respectively used as the adding methods of metallic phase to prepare Ni/（90NiFe2O4-10NiO） cermets for the inert anode in aluminum electrolysis. The microstructure and thermal shock resistance of cermet samples were studied. The results show that, for the samples prepared by ball mixing method, aggregation of metallic phase is found in either the green blocks or sintered samples and the extent of aggregation increases with the increase of metal content. For 6.5Ni/（90NiFe2O4-10NiO） cermets prepared with electroless plating method, the homogeneous and fine metallic particles are found in either the green compacts or sintered samples, but the relative density and thermal shock residual strength decrease by 3% and 28%-58% respectively, compared with samples prepared with ball mixing method.     

TC4钛合金与LD10铝合金感应摩擦焊接头的组织与性能

利用感应电磁场对焊接过程热与物质流动作用,改善异种金属摩擦焊接头的组织与性能。采用光学金相、扫描电镜及室温拉伸实验与对比分析的方法,研究了外加电磁场对弱磁性材料TC4钛合金与LD10铝合金摩擦焊接头焊合区的显微组织、主要合金元素扩散行为及室温力学性能的影响。结果表明:外加电磁场作用使TC4钛合金与LD10铝合金摩擦焊接头铝合金侧动态再结晶区宽度增大;同时,感应电磁场通过影响摩擦副合金材料内部电子密度状态等,促进了摩擦焊接过程中主要合金元素Al和Ti在焊合区的扩散过程,并且提高了TC4钛合金与LD10铝合金摩擦焊接头的拉伸强度。其中,外加电磁场在顶锻保压阶段的影响更为明显。     

10 kV配电线路的故障分析及对策研究

10 kV配电线路受到各方面因素的影响,时常会出现各种故障。为了查找出这些故障的原因,避免故障再次发生,对10 kV配电线路故障原因及其防范措施进行了分析和研究,以全面提高10 kV配电线路的可靠性。     

K60与动态集成模拟摄像头的智能车控制策略设计

本文设计了一种能在模拟跑道上顺利完成智能循迹的小车.该设计以嵌入式单片机MK60DN512ZLVQ10作为核心控制器,CMOS动态集成模拟摄像头OV5116作为图像传感器获取跑道图像信息.运用硬件二值化处理图像并提取赛道特征信息,通过控制舵机的转向和电机的转速,使车模能够按照规定的跑道和规则完成比赛.实验结果表明:该智能小车循迹精准,运行快速平稳,为相关循迹比赛和设计提供了参考.     

Perception of Hand Force in Power Grip for Females

Borg's rating of perceived exertion (RPE) and category ratio (CR‐10) scales are commonly used to quantify perceived muscular exertion for body segments. Twenty females participated in an experiment to study the power grip force at four perceived exertion levels using either dominant or nondominant hand under two posture conditions. It was found that the subjects tended to apply a higher power grip force (100% of perceived maximum voluntary contraction) than the levels they were requested to apply. The power grip forces between dominant and nondominant hands at low hand exertion levels were negligible. The grip forces between the two hands were significantly different when the exertion level was nearly maximal. Linear regression models were established for the subjects to link the relationship between the perceived hand exertion and measured grip force, hand used, and hand/arm posture. All the models were statistically significant (p < 0.0001) with R² values 0.97 or higher. These models provided better estimates in perceived hand exertion for dominant hand than for nondominant hand. A follow‐up experiment was conducted to measure the subjective rating of both the CR‐10 and RPE when a 98 N grip force was applied. It was found that the subjects reported higher exertion levels when they were using the CR‐10 scale than when they were using the RPE scale. © 2011 Wiley Periodicals, Inc.     

管理科学发展的泛系鸟瞰与显微

从泛系理论的视角,运用泛系快深频方法对管理科学各理论学派进行审视,对相关理论进行详细解读,将管理科学与方法看成某种特化的泛系方法与泛系管理哲学,在泛系理法基础上实现某种三大显生(系统,关系,泛对称//泛系真善美禅极值原理)及技术化具体建构的分类对策巧显生.