Effects of upholstery materials on the burning behavior of real‐scale residential upholstered furniture mock‐ups

Fire spread and growth on real‐scale four cushion mock‐ups of residential upholstered furniture (RUF) were investigated with the goal of identifying whether changes in five classes of materials (barrier, flexible polyurethane foam, polyester fiber wrap, upholstery fabric, and sewing thread), referred to as factors, resulted in statistically significant changes in burning behavior. A fractional factorial experimental design plus practical considerations yielded a test matrix with 20 material combinations. Experiments were repeated a minimum of two times. Measurements included fire spread rates derived from video recordings and heat release rates (HRRs). A total of 13 experimental parameters (3 based on the videos and 10 on the HRR results), referred to as responses, characterized the measurements. Statistical analyses based on Main Effects Plots (main effects) and Block Plots (main effects and factor interactions) were used. The results showed that three of the factors resulted in statistically significant effects on varying numbers of the 13 responses. The Barrier and Fabric factors had the strongest main effects with roughly comparable magnitudes. Foam was statistically significant for fewer of the responses and its overall strength was weaker than for Barrier and Fabric. No statistically significant main effects were identified for Wrap or Thread. Multiple two‐term interactions between factors were identified as being statistically significant. The Barrier*Fabric interaction resulted in the highest number of and strongest statistically significant effects. The existence of two‐term interactions means that it will be necessary to consider their effects in approaches designed to predict the burning behavior of RUF.     

Study of trace elements in coal and mining wastes and its significance in China

In the world energy about 26% of all was dedved from coal combustion. Nearly 80% of the electricity produced in China is generated from coal. Coal will play the most important role in the coming 50 years as the past century in China. However one consequentially of the mining and combustion of coal is the mobilization of trace elements, especially trace metals, which have environmental and human health significance. Information on concentrations and distributions of potentially toxic elements in coal, and information On the modes of occurrence of these elements and the relations of the minerals in coal can help to predict the behavior of the potentially toxic trace metals dudng cleaning, combustion, weathering, and leaching.     

高温深层缓速酸化优化研究及应用

针对临南油田酸化效果差的问题,从油藏地质特点出发,分析了制约其酸化效果的主要因素,即地层温度、铁离子二次沉淀、地层深部改造等。通过室内研究,优选出一种高性能的缓速酸,该酸液具有溶蚀率高、缓速性能好、能有效防止铁离子二次沉淀、与地层水配伍性好等特点。同时还对酸化施工工艺进行了优化,配套了适合的返排工艺。该工艺在现场应用后,酸化效果得到了明显的改善。     

关于职业技术学院英语教学的思考

为了适应新形势、新需求，根据职业技术教育的实践，探讨如何调动学生英语学习的积极性，激发学生的学习动力，以改变被动学习和由此而产生的逆反心态，使英语学习收到好的效果。     

任务驱动的大学信息技术教学改革

针对高校学生的特点,以提高学生对信息技术知识结构和应用能力为目标．进行基于任务驱动教学方法的改革。任务驱动教学可以大大提高学生学习的积极性．同时也取得显著的教学成果。现就教学过程提供一些实践依据和方法措施以供借鉴。     

基于关键链优化的课程教学与实践教学契合OA绩效方法研究

作为高等教育体系中的两大主要模块,课程教学与实践教学在时间维度、逻辑维度和认知协同维度往往会存在矛盾,导致了教学质量的降低。本文从这三个维度出发,首先确定了具有普适性的教学绩效评估方法;随后根据多项目管理的关键链法提出了教学优化的具体步骤;最后以工商管理专业课程为实例根据上述教学绩效评估方法验证了教学优化的效果。     

提高地方院校信管专业学生实践能力的途径研究

为了提高地方院校信管专业的竞争能力,将实践能力和地方性特色培养融入到学校教育中,成为了现在地方院校信息管理与信息系统专业教育的重中之重。论文首先强调了信管专业学生实践能力培养的重要性。然后通过调查比较找出目前各地方院校信管专业实践教育体系存在的不足之处。最后以南通大学为例具体研究提高南通大学信管专业学生实践能力的途径。     

团队项目训练法在《国际贸易实务》教学中的应用

团队项目训练法是项目教学法的延伸和发展,也是设计教学法、体验教学法、情景模拟教学法等行动导向教学方式的综合运用。文章浅析了团队项目训练法在高职《国际贸易实务》课程教学中的应用,说明团队项目训练法对于调动学生积极性和主动性、培养学生思考能力和观察能力、提高教学效果等方面具有显著的成效,并总结了开展团队项目训练需要注意的问题。     

软件工程专业汇编语言课程实践教学模式研究

本文提出了汇编语言课程学习对于软件人才能力培养的重要性,分析了汇编语言课程教学现状,提出了一些实践教学改革措施。     

项目驱动式教学法在计算机基础课程中的应用

项目驱动式教学做为一种新兴的教学模式越来越多的应用于各门学科的教学应用当中。计算机基础这门课程由于其理论知识更新速度快,实践操作要求高的特点,将之与项目驱动式教学法相结合可以起到很好的教学效果。本文将传统教学方法和项目驱动式教学法进行对比,针对当前教学过程中存在的问题提出相应的解决方法。