钼蓝光度法测定锰硅合金中磷含量的不确定度评定

测量不确定度可用于对钼蓝光度法测定锰硅合金中磷含量的结果进行评估。通过建立数学模型,找出影响钼蓝光度法测定锰硅合金中磷含量的不确定度因素,计算各个不确定度分量,并合成不确定度,最终给出扩展不确定度和置信水平。     

新型耐火度试验炉的应用

介绍了一种新型的耐火度试验炉。新型耐火度试验炉通过工业Pc及全自动控制,加热系统采用新型发热体以及摄像系统的引入,实现了耐火度检测的全程监控。实际应用表明,新型耐火度试验炉与碳粒炉相比节能降耗,控温精度高,提高了检测的自动化程度,使结果更加准确。     

ICP-AES法测定低、微碳铬铁中硅、锰和磷含量

介绍了邯钢技术中心开发的用ICP-AES法同时测定低、微碳铬铁中硅、锰和磷的方法。试样先用盐酸溶解,在加入一定量的过氧化氢加热,然后定容。结果表明,该方法的准确度和精密度都能满足国标要求,效果良好。该法与传统化学湿法相比,分析时间可由原来的8h缩短到3h,提高了工作效率。     

激光测量法在桥式起重机啃轨检测中的应用

论述了桥式起重机大车运行中经常出现的啃轨现象,分析了桥式起重机啃轨原因和判定依据及起重机啃轨造成的危害,提出了用激光测量法解决啃轨问题的措施。在现场实际应用于24台吊车的测量,取得了满意的效果和可观的经济效益。     

温度对基于线阵CCD测长系统的影响

CCD(电荷耦合器件)是一种高性能的半导体光电器件,近年来在医院、工业检测等领域里得到了广泛的应用。将CCD应用于几何量测量中,可以满足高精度测量、在线动态检测和非接触测量等的工程实际要求。在分析线阵CCD工作原理和高温辐射对CCD的影响的基础上,设计了基于CCD的钢管长度测量系统。采用双同步CCD技术,结合上位机的数...     

计量辅助系统客户机称量数据采集系统的故障排除

浙江杭钢高速线材有限公司的计量辅助系统客户机通过串口通信实现称量数据的采集,但系统不定期地会出现数据不能采集和鼠标不受控制的现象,严重影响了正常生产。通过对采集系统的全面分析,发现操作系统误将计量秤识别为串口鼠标。排除故障后的系统,称量数据能够稳定可靠地传递给客户机。     

室内软装设计的原则及未来发展趋势的研究

随着人们生活水平的日益提高,人们的生活方式与消费习惯也发生了很大转变。＂轻装修重装饰＂受到越来越多年轻一代的追捧,由此也引发了近几年家居软装市场的快速发展。本文对于软装进行了定义,分析了软装设计原则及未来的发展趋势。     

Fabrication and characterization of YVO4：Eu^3＋ nanomaterials by the microwave technique

Fabrication and characterization of YVO4:Eu3+ nanophosphors prepared by microwave(MW) irradiation assisted soft template synthesis were reported.The effects of synthesis conditions such as different powers of MW irradiation,pH values and concentration of reac-tion materials on properties of nanophosphor were also investigated to obtain the controllable size,morphology and high luminescence effi-ciency.Morphology,crystalline structure,and optical properties were characterized by field emission scanning elect...     

Enrichment and individual differences affect welfare indicators in squirrel monkeys (Saimiri sciureus).

Enrichment aims to improve captive animals' welfare by enhancing their environments. Two of the struggles associated with measuring welfare are identifying when animals' needs are being met or surpassed and identifying how individual differences play a role in these outcomes. Using a group of related Guyanese squirrel monkeys, we studied changes in five welfare indicators under different environmental conditions. Manipulating food presentation, walkways, and toys, we created five enrichment levels ranging from just above USDA standards to considerably more complex than the animals' normal housing. At the end of each level, a novelty test was performed in which an unfamiliar woman entered the enclosure and offered food. Changes in behavior as a function of enrichment condition were analyzed using a repeated-measures MANOVA. Compared to baseline, less enrichment consistently increased negative welfare indicators (abnormal behavior, aggression, and negative responses to the novelty test), while more enrichment sometimes decreased these indicators. Positive welfare indicators were less consistently related to enrichment, but positive response to the novelty test did increase somewhat in the most enriched condition. Across conditions, rank correlations revealed that individuals had highly consistent individual differences in positive responses to novelty and somewhat consistent individual differences in rates of aggression. The goal of the enrichment and the species, sex, and individual animals to be enriched should be considered when selecting a welfare indicator, and facilities measuring animal welfare should study changes in the behavior of specific individuals to control for individual differences. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Spatial and numerical predictors of measurement performance: The moderating effects of community income and gender.

Spatial reasoning and numerical predictors of measurement performance were investigated in 4th graders from low-income and affluent communities. Predictors of 2 subtypes of measurement performance (spatial–conceptual and formula based) were assessed while controlling for verbal and spatial working memory. Consistent with prior findings, students from the affluent community outperformed students from the low-income community on all measures examined. More importantly, the study revealed different patterns of relations between cognitive skills and academic performance in the 2 communities. Specifically, spatial skills were related to measurement performance in the affluent but not in the low-income community. These findings demonstrate that socioeconomic context impacts not only children's levels of performance but also their capacity to apply basic cognitive skills, like spatial reasoning, to their academic performance. (PsycINFO Database Record (c) 2011 APA, all rights reserved)