A Trial of the Five Es: A Referent Model for Constructivist Teaching and Learning

The science and technology education literature indicates that teaching within a constructivist paradigm is an effective way to promote student learning. Despite this, most primary school teachers do not use constructivist theoretical approaches because they are perceived as difficult and impractical to implement. To promote constructivist teaching and learning approaches in schools, teachers need access to models and strategies they can implement effectively and with relative ease. A unit of work was developed, based on the Five Es model (Engagement, Exploration, Explanation, Elaboration and Evaluation), and taught to a year 3 class. Ten students were participants in the study and became the sample. Data were analysed using two different methods to compare and validate findings. The unit of work, based on the Five Es model, was found to be interesting and fun by students, and motivated student learning and promoted student higher-order thinking.     

Numerical Analysis of the Stability of Embankment Slope Reinforced with Piles

The effects of stabilizing piles on the stability of an embankment slope are analyzed by numerical simulation. The shear strength reduction method is used for the analysis, and the soil - pile interaction is simulated with zero-thickness elasto-plastic interface elements. Effects of pile spacing and pile position on the safety factor of slope and the behavior of piles under these conditions are given. The numerical analysis indicates that the positions of the pile have significant influence on the stability of the slope, and the pile needs to be installed in the middle of the slope for maximum safety factors. In the end, the soil arching effect closely associated with the space between stabilizing piles is analyzed. The results are helpful for design and construction of stabilizing piles.     

一种新型的SBS装饰胶

采用新颖的增黏树脂复配物 ,与适当比例的SBS弹性体及合适的混合溶剂相配合 ,获得一种价廉物美的新型胶黏剂     

圆筒弯扭组合变形中弯曲切应变的测量误差分析

在实际测量过程中，电阻应变片的贴片位置、栅长大小以及横向效应均会对测量的精确度产生影响。该文从以上3个方面对《材料力学》课程的电测综合性实验——圆筒的弯扭组合实验中，利用全桥接法测量弯曲切应变的误差原因进行了全面分析，指出测量误差主要是由于电阻应变花的敏感栅中心偏离中性轴所致。     

钢的热轧变形

轧制理论中对钢在热轧状态下变形情形的研究，通常是在一定的理论条件下进行的。本从热加工实际出发。对影响钢的热轧变形的一些因素加以探讨。     

论汉魏六朝音乐赋的新变

汉魏六朝音乐赋中乐器赋占绝大多数,始于两汉,盛于两晋,在发展过程中题材不断拓展,呈现出骚体趋于俳体,骈偶化增强的趋势。其发展兴盛、题材拓展、体制变化的过程与当时的社会生活内容的拓展、人们的喜好和文学体制的变化息息相关,成为了解和考证当时社会生活的一面镜子。     

基于半参数回归分析法的隧洞变形量计算模型

通过补充随时间连续变化的系统误差分量来分析该误差对变形量计算的影响,运用非线性方法建立了隧洞变形量计算模型.基于实测数据,采用多种方法对隧洞变形监测过程和模型产生的厘米级系统误差进行了消除,提高了现场量测结果的精度.计算结果表明,阻尼最小二乘法、卡尔曼滤波法和半参数回归分析法三种误差消除方法都能满足工程需要,其中半参数回归分析法对隧洞变形的计算结果与实际最为接近,对工程设计具有指导意义.     

低碳交通:寻求城市主干道横断面的低碳设计

时下,低碳已成为政府和学者共同关心的热点,低碳交通亦成为一种必然趋势.其中,设计低碳排放的城市主干道横断面显得尤为必要.本文通过交通排碳量及道路绿化固碳量计算,综合比较两者之间的关系,并结合各绿化树种的固碳能力,通过定量分析,试图探寻一种低碳排放的城市主干道横断面的设计方式,以期推动低碳城市与低碳经济的发展,为发展城市低碳交通提供有益的尝试和借鉴.     

浅析数字正射影像图制作质量的改进

参照l：500大比例尺数字正射影像图的制作过程,详细论述了影响数字正射影像图质量的各种因素,针对影响数字正射影像图质量的各种因素逐一找出解决方案,为今后制作大比例尺数字正射影像图提供了有利的作业依据．     

岩石在不同围压条件下破坏过程的模拟研究

利用RFPA系统对不同围压条件下岩石的剪应力状态、最大主应力状态及宏观破坏模式进行模拟研究,为实际操作提供较精确的数据基础。