精密过滤曲线的数据拟合技术

本文论述了基于Excel的精密过滤流量曲线整理、数据拟合技术方法。该技术方法在产品开发等工程技术实践中，对具有多参变量的特性曲线整理有指导意义。     

带强迫项对流系统的空间混沌定义

主要研究了一类二维离散动力系统(2-D),即带强迫项对流系统的空间混沌行为,介绍了连续对流系统在Li-Yorkc和Marotto意义下的空间混沌定义以及非连续对流系统(分段连续对流系统)在转数区间意义下的空间混沌定义,并且分析了它的空间混沌的存在性.     

假日经济与休闲体育产业的发展

以我国目前假日经济为研究背景,阐述了休闲体育产业发展的可能性和必要性,揭示了休闲体育产业发展现存的主要问题,提出了相应的对策。旨在丰富我国休闲体育产业的理论研究,并为休闲体育产业发展的实际提供思路。     

恒定运动和运动后左室舒张功能的变化

采用脉冲多谱勒超声心动图观察恒定运动中和运动后左室舒张功能的变化,研究结果显示100w强度运动时舒张早期最大峰值速度E峰峰值流速、舒张晚期最大峰值速度A峰峰值流速、舒张早期最大瞬时压差PPGE、舒张末期最大瞬时压差PPGA显著大于50w,100w强度运动时E/A值显著小于50w.运动后恢复期E峰、A峰、PPGE、PPGA逐渐减少,E/A值逐渐增大,并很快恢复到安静状态.结论:其动力来源和运动时左室的收缩功能提高有关.     

抽象函数的一致强可导性问题

文中指出从区域G包括于K(K是数域)到Banach空间内的抽象函数x(t)的强一致连续性、强(弱)可导性及一致强(弱)可导性、强囿变之间的关系，并且给出一致强可导的条件。     

The promise and reality of formative assessment practice in a continuous assessment scheme: the case of Trinidad and Tobago

Continuous Assessment (CA) systems are externally directed, curriculum-based assessment schemes used for both summative and formative purposes within classrooms. CA has been implemented as national policy in several postcolonial developing countries and is believed to hold great promise for improving education outcomes. This theory-driven evaluation (TDE) used a mixed methods research design to interrogate the nature of CA practice. The focus was on stakeholders’ understanding and practice of formative assessment in the CA Programme (CAP) of Trinidad and Tobago. The integrated findings suggest that the programme planners’ formative intent was often not fulfilled. Instead, teachers routinely recorded assessment marks without using the data. There is evidence that formative assessment practice was not congruent with teachers’ pedagogical beliefs and practices. Although the design of CA schemes suggests the possibility of synergy between formative and summative purposes, in reality this ideal is rarely achieved in these particular contexts.     

留守儿童的心理问题及教师应对策略

留守儿童心理问题主要有：人格发展不良,心理健康水平低,行为问题突出,学业成绩不良,生活状况差等;造成这些问题的主要原因有：亲子关系缺失,社会支持欠缺,监护人水平低,学校周边环境差等。应对策略有：加强与留守儿童家长的联系,营造良好的成长环境,积极参加各种针对留守儿童教育的教师培训;根据留守儿童教育的生理特征、心理特征采取相关举措。     

英语持续性动词和瞬时动词在不同时态中的应用与区别

英语中的实义动词根据其词汇意义大致可分为两大类,即持续性和瞬时性动词,本文就这两种动词在不同的时态和语境中所表达的含义进行区别与对比。     

连续时间的网络截流选址模型与算法——以防御性醉酒驾驶的拦截问题为例

首先提出了连续时间的网络截流选址问题,并以保护整个道路交通网络为目标,建立了防御性醉酒驾驶拦截问题的模型。根据问题的特征,分别设计了基于时间的迭代改进算法和离散选址问题的拉格朗日启发式算法,并通过随机实例对算法进行了测试。结果表明:连续时间的同步拦截问题可以通过分离连续的时间变量和离散的选址变量的方法,多次求解覆盖问题而有效解决,并且迭代改进算法对时间的搜索性更强,从而能够用较少的迭代次数解决原问题。     

Evaluation of reflective practice in teacher education

Teacher education based on ‘reflective practice’ consists of observing, analysing and reflecting on teacher performance in order to improve professional practice. This article presents the results of an evaluation of a programme on mathematics teaching carried out using reflective practice. It was targeted at 284 teachers in various stages of the education system, using an approach that combines quantitative (surveys) and qualitative (interviews and reports) methods. While the study shows that the education programme generates high levels of satisfaction, pedagogical appropriateness and learning, its achievements in effectiveness are moderate. Although, in general, what is learned through teacher education is implemented in the classroom, it is done so in an isolated fashion, in other words, individually and without becoming a part of the culture of the school. The results show little evidence of its impact on student learning. The article offers proposals for improving the education programme, while, at the same time, analysing the usefulness of the approach and evaluation tools employed.