New V control chart for the Maxwell distribution

Control charts have been popularly used as a user-friendly yet technically sophisticated tool to monitor whether a process is in statistical control or not. These charts are basically constructed under the normality assumption. But in many practical situations in real life this normality assumption may be violated. One such non-normal situation is to monitor the process variability from a skewed parent distribution where we propose the use of a Maxwell control chart. We introduce a pivotal quantity for the scale parameter of the Maxwell distribution which follows a gamma distribution. Probability limits and L-sigma limits are studied along with performance measure based on average run length and power curve. To avoid the complexity of future calculations for practitioners, factors for constructing control chart for monitoring the Maxwell parameter are given for different sample sizes and for different false alarm rate. We also provide simulated data to illustrate the Maxwell control chart. Finally, a real life example has been given to show the importance of such a control chart.     

Monitoring the parameter vector of regression models with time-to-event response in phase II processes

In most of the existing specialized literature, monitoring regression models are a special case of profile monitoring. However, not every regression model always represents appropriately a profile data structure. This is clearly the case of the Weibull regression model (WRM) with common shape parameter γ. Even though it might be thought that existing methodologies (especially likelihood-ratio (LRT)-based methods) for monitoring generalized linear profiles can also be successfully applied to monitoring regression models with time-to-event response, it will be shown in this paper that those methodologies work fairly acceptable just for data structures with 1000 observations at least approximately. It was found out that some corrections, often referred to as Bartlett's adjustments, are needed to be implemented in order to improve the accuracy of using the asymptotic distributional properties of the LRT statistic for carrying out the monitoring of WRM with relatively small and moderate dimensions of the available datasets. Simulation studies suggest that the use of the aforementioned corrections make the resulting charts work quite acceptable when available data structures contain 30 observations at least. Detection abilities of the proposed schemes improve as dataset dimension increases.     

Fetal movements: What are we telling women?

Problem

Information that women receive about the importance of monitoring fetal movements and what to do if there are changes is inconsistent and may not be evidence based.

脱贫人口返贫风险监测：机制设置、维度聚焦与实现路径

加强脱贫人口返贫风险监测是后脱贫时代农村贫困治理的必然要求。遵循脱贫人口返贫问题事前治理逻辑,基于对返贫风险生发运演机理的理性揭示和科学预判,把内生脱贫动力、生计资源禀赋、外部灾害冲击和社会负面影响作为脱贫人口返贫生发的主要监测维度,且诸维度之间相互作用、相辅相成。返贫风险监测机制基于四大维度的监测预警能力越强,则越有利于及时化解返贫风险、阻断返贫。当前脱贫人口返贫风险监测机制建设面临监测制度不完善、监测主体配合机械式、监测技术体系不健全、风险信息管理碎片化和监测工作考核监督不完善等不利因素,迫切需要完善风险监测制度,布控筑牢脱贫人口返贫防线;明确风险监测职责,推动多元主体共同参与;强化监测技术体系支撑,打造返贫信息共享平台;创新信息管理机制,构建协同治理良好格局;共同推动后脱贫时代脱贫人口返贫风险监测机制的逐步形成、持续巩固和长效发力。     

元认知理论、作用及其能力的培养

元认知是对认知的认知,在教育、语言领域中有着广泛、深刻的影响.本文概述了元认知理论,它包括三个组成部分:元认知知识、元认知体验、元认知监控.并讨论了元认知在外语自主学习中的作用,及如何培养元认知能力来促进学习者的自主学习能力,有效提高学习效率,以达到教育要求.     

中小学教学质量监控与评估体系构建的研究与思考——以江苏省南京市鼓楼区基础教育优质均衡发展为例

提高教学质量是基础教育教学管理的永恒主题,也是新时期基础教育改革与发展的中心任务。教学质量监控与评估可以促进基础教育优质均衡发展,构建基础教育质量监控与评估体系应注重树立正确的教学质量观;关注教学质量监控评估功能的多样性;构建合理的教学质量监控评估指标体系;充分调动教师参与教学质量监控评估的积极性;建立有效的保障支持系统。     

Power and perceptions in participatory monitoring and evaluation

This paper examines the assumptions that commonly underpin the design of participatory monitoring and evaluation (PM&E) within development programmes through the examination of a case study of a large rural development programme in Uganda. This case study reveals a mismatch between programme assumptions and participant perceptions, which stymied the implementation of PM&E. In this case, PM&E was based on the assumptions that programme and participant goals were compatible, participants were willing to volunteer and engage themselves for the greater good of their communities, and information sharing and communication was fairly free and open. However, farmers within the programme felt that the bureaucratic and accountability requirements of the programme were not their concern, and were acutely aware of power differences between farmers and programme officials, and between farmers of varying status. The key lesson to be drawn from this case is the need for a heightened awareness of power dynamics and political factors in the design of PM&E.     

非对称基坑开挖监测位移下数值对比分析

以南京市青奥轴线地下交通工程主隧道基坑非对称开挖水平位移监测数据为依据,对水平位移监测值与ABAQUS数值模拟值进行对比分析。得出结论:墙体水平位移首先是悬臂开挖的墙顶向外发生三角形分布的位移,然后随着支撑的架设,墙体发生转动,数值模拟值与实际监测值基本符合;在开挖面附近的土压力,随着墙体高度的增加而增大;在支撑以上部分,模拟值要小于计算值,而在开挖面以下部分,则模拟值大于计算值;随着悬臂段开挖深度的增加,悬臂段最大土压力值也在逐渐增加,墙底土压力值在逐渐减小。     

高校教学质量监控的现状与对策

从教学质量监控的目的和意义入手 ,针对目前高校教学质量监控存在的问题 ,提出了构建高校教学质量监控机制的设想 ,阐述了教学质量监控的实施要点