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《广东化工》2017,(22)
本文针对材料化学、材料科学与工程等学科交叉性较强的材料类专业开设"物质结构基础"课程的教学现状和困惑,提出对课程教学方法及教学内容进行全方位改革的教改思路。采用启发式教学、讨论式教学、专题式教学等灵活多样的教学方法,着重培养学生创新思维及独立分析问题、解决问题的能力;对教学内容进行全面改革,凝练出切合材料类专业实际,能在前导课程和后续课程之间起到承上启下的重要衔接作用的教学内容和知识体系。本文阐述了作者多年来在材料类专业从事"物质结构基础"课程教学过程中的思考与实践,以及教学改革的经验、思路,以期进一步改善"物质结构基础"本科课程教学质量,为培养具有创新意识和创新能力的材料类专业人才发挥应有的作用。 相似文献
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热处理是本科机械类专业"工程材料及成形技术基础"课程的重要组成部分,但存在内容多、规律性不强、概念抽象等缺点,因而教师较难获得理想的教学效果。为此,面向应用型本科机械类专业学生,本文探讨了当前"工程材料及成形技术基础"课程中热处理教学所存在的一些问题,提出了包括善于结合等温冷却转变曲线以增加规律性认识,善于提炼热处理工艺特征以简化记忆,教学实验同步展开以增加学习趣味及减少教学抽象等措施。其中大部分措施取得了较好的教学效果。 相似文献
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随着我国制造业的迅猛发展和智能制造时代的到来,传统材料类专业的教学方法已不能满足当今社会对高素质应用人才的需求,因此,对专业课程教学方式的改革迫在眉睫。作为一种新兴教学方法,项目教学法在教学过程中展现出前所未有的成功。为此,我们结合自身专业特色,提出了在材料类专业教学中引入课程项目的必要性及所产生的意义。文章简述了课程项目引入的必要性和可行性,浅析了课程项目在材料类专业教学中的意义。 相似文献
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作为材料类、化学类专业本科生开设的首要学习的专业基础课程,《无机及分析化学》、《无机化学》在培育高校学生的创新意识、专业思维等方面有着极其重要的作用。本课题立足材料及化学专业无机化学类课程开设的实际情况,依据低年级学生特点,重点探索问题的学习法(PBL)案例主题的提出,并开展无机化学类课程的"基于问题的学习法+翻转教学"复合模式教学研究。从教学方法设计、新旧教学模式混用、过程评价等方面进行了探讨,提出了相应教学改革模式的建议,并引导大一新生对专业课程学习产生兴趣,推进适应学生特点的新教学方式改革。 相似文献
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Solid solutions of diphosphates of zinc and copper and of zinc and cobalt were synthesized from mixtures of pure diphosphates at temperatures up to 1000°C. Their X-ray diffractometry patterns varied continuously from one end member to the other. Solid solutions of orthophosphates of composition Zn3−x Cox(PO4 )2, with x = 0.4–1.6, were formed at temperatures up to 950°C; all exhibited the structure of γ-Zn3 (PO4 )2. Solid solutions of orthophosphates of composition Zn3−x Cux (PO4 )2 exhibited more-complex behavior. At 1000°C and copper contents of 20–80 mol%, a phase that is related to Cu3 (PO4 )2, termed here the "ε-phase," predominated. At 850°–950°C and in the region from 20 mol% to ∼33 mol% of copper, the solid solutions (the "η-phase") adopted the structure of graftonite. At 800°–900°C and 10–15 mol% of copper, the solid solutions exhibited a new structure (the "δ-phase"), which we found to be related to the mineral sarcopside. At temperatures 950°C, the solutions that contained 5–15 mol% of copper (the "β-phase") had the structure of β-Zn3 (PO4 )2, whereas at 800°–850°C, solutions with 5 mol% of copper (the "-phase") exhibited the structure of γ-Zn3 (PO4 )2. Attempts to synthesize Cu+ ZnPO4 and Cu+ Cu2+ Zn3 (PO4 )3 were unsuccessful. 相似文献
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为了提高油田的生产效率,设计最佳的油气集输处理的工艺流程,更好地完成油气水分离处理的任务。对油气集输工艺技术进行优化,发挥高效油气水分离处理设备的优势,提高油气水处理的质量,保证油气集输工艺顺利实施,获得最佳的油田产量外输。 相似文献
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建设创新型国家是我们中华民族的历史责任。“自主创新、重点突破、支撑发展、引领未来”的16字方针应当成为我们未来创新活动的指南。建设创新型国家把自主创新放在首位,并提出了引领未来的高标准要求。钢铁科技创新必须突出重点,抓住创新成果产业化这个关键,支撑起行业和国民经济的发展。 相似文献
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相比已经完善丰富的开采和勘探技术,油气的运输以及储存却仍然存在不足之处。我国对能源安全提出更加严格要求的同时,对区域经济的发展规划也有足够重视。因此,保障油气管道的安全则成为了我国能源安全战略的重中之重。在阐释油气管道现阶段在储运安全保障技术发展状况的基础上,分析了现存的问题及解决问题的手段,并指出未来可能使用的目标策略,为今后研究者提供一定程度上的借鉴经验。 相似文献
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膜的污染和劣化及其防治对策 总被引:25,自引:0,他引:25
较为系统地介绍了膜污染和劣化的定义和特点,因膜污染和劣化而造成的膜性能变化,以及如何预防、减少或清除膜污染和劣化的一些通用方法。 相似文献
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James L. White David G. Salladay David O. Quisenberry Donald L. MacLean 《应用聚合物科学杂志》1972,16(11):2811-2827
Gel permeation chromatographic (GPC) and thin-layer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtaining absolute molecular weight distributions for BR and SBR based upon variations of the Strasbourg Universal Calibration procedure are described. In particular, [η]–M relationships in both the GPC solvent (THF) and in a second solvent (toluene) were used; in addition, results of statistical mechanical calculations for \documentclass{article}\pagestyle{empty}\begin{document}$\overline {s^2 }$\end{document} (based on the assumption of negligible steric hindrance and freely rotating bonds) were applied. An experimental comparison of these methods was carried out, and use of the [η]–M relationships for both solvents was found to give satisfactory results. The predictions of the statistical theory were too low. A detailed study of polymer–solvent–gel interaction in the GPC unit was made through investigation of ternary phase equilibrium in the (polystyrene)–THF–(polymer) system. The polymers studied included BR and SBR with varying styrene contents. Experimental techniques for TLC separations of BR, SBR, and polystyrene according to the composition are described. 相似文献