共查询到20条相似文献,搜索用时 125 毫秒
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校企合作对于地方高校化学专业的实践教学模式创新以及应用型人才培养具有重要意义。我校化学本科专业尝试通过校企合作,建立稳定的校外实践教学基地,组织学生参加专业见习,毕业实习、毕业论文及就业培训等实践活动。经过7年的探索与实践,初步形成了"专业见习-毕业实习-毕业论文-就业培训"四位一体的实践教学模式,该模式的实施提高了大学生的实践能力、创造能力和就业能力,也促进了"双师型"教师团队的建设,是一条提高我校化学类专业应用型人才培养质量的有效途径。 相似文献
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为了培养应用型化学人才、修订教学计划、强化实践教学环节,为应用化学专业实践教学改革奠定基础,建立了“多模块、全程融合”的多层次实践教学体系,增加以学生就业岗位工作任务为背景的实践内容,将实践能力的培养贯穿于人才培养的全过程。通过长期不懈地努力,在人才培养质量、校外人才培养基地、学生综合实践能力方面取得了显著成效。 相似文献
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科学合理的实践教学体系是实现应用型专业人才培养目标的关键。文章对地方院校化学化工专业实践教学体系的内容进行了研究,对校内实验、实训,校外实训、实习两部分进行了探索,提出构建以"合成制备-分析表征-性能应用"实践教学体系,构建具有"一体化、三阶段"为特色的化工实践课程教学新体系及构建校内课程设计和毕业设计(论文)等实训、实践体系;根据学生知识技能积累的不同阶段,构建校外三层次实践教学体系;构建"互联网+课内课外"的实践教学平台,全面实现校内、外所有化工实践教学基地交流互动。 相似文献
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几种水溶性高分子化合物对煤泥浮选和过滤的影响规律 总被引:1,自引:0,他引:1
在对太原西铭的细粒煤泥浮选和过滤试验过程中,分别加入了4种不同的絮凝剂——聚丙烯酰胺(PAM)、聚氧化乙烯(PEO)、聚丙烯酸钠、壳聚糖。试验结果表明,聚氧化乙烯类药剂对煤泥的浮选和过滤过程都有较大的影响,可以增加精煤产率、提高尾煤灰分,使过滤速度加快、滤饼水分降低;选用的聚丙烯酰胺类药剂没有明显的规律;而聚丙烯酸钠和壳聚糖则影响不大。 相似文献
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碳钢水冷器广泛应用于炼油化工装置,受循环冷却水的影响,长期运行过程中易出现腐蚀、结垢问题导致停车检修,造成巨大经济损失。介绍了腐蚀机理和影响腐蚀的因素,着重分析了水冷器不同腐蚀结垢的类型,并提出了防治措施。 相似文献
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This study investigated the adsorption of calcium and gypsum on scheelite and fluorite using micro-flotation, X-ray photoelectron spectroscopy, scanning electron microscope with energy-dispersive spectrometer, and zeta potential measurements. Micro-flotation showed scheelite recovery is more sensitive to calcium, and gypsum shows stronger inhibition than calcium. Stick-shape precipitates as sulfate-bearing are only found on fluorite surface in gypsum solution. Change law of the zeta potentials of scheelite and fluorite in gypsum solution is obviously different from that in calcium solution. Therefore, we concluded that gypsum would make the separation of scheelite from fluorite more difficult than calcium. 相似文献
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研究炭黑N234和CBp补强天然橡胶(NR)/顺丁橡胶(BR)并用胶的性能,以及炭黑N234补强和CBp与CNTs协同补强溶聚丁苯橡胶(SSBR)/NR并用胶的性能。结果表明:相比于炭黑N234,CBp可以延迟胶料的硫化;与炭黑N234补强NR/BR并用胶相比,CBp补强NR/BR并用胶60 ℃时的tanδ显著减小,说明CBp可以一定程度上降低NR/BR并用胶的滚动阻力;在CBp与CNTs协同补强SSBR/NR并用胶中,CNTs对SSBR/NR并用胶的补强作用明显;30份CBp与2份CNTs协同补强SSBR/NR并用胶的综合物理性能与20份炭黑N234补强SSBR/NR并用胶相当,且0 ℃时的tanδ增大,说明CNTs可以改善SSBR/NR并用胶的抗湿滑性能。 相似文献
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1 买方市场是赊销现象的主要社会经济原因我国从经济转型过程中,社会生产力迅速发展,许多商品从供不应求转变为供大于求。在供大于求的现实情况下,竞争的压力往往迫使许多企业会采用各种促销手段,向买方提供优惠的交易条件,以求开拓市场,增加销售收入。赊销就是行之有效的促销手段。 相似文献
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Deacetylated chitins (10.7–67.2%) were prepared by alkaline hydrolysis to determine an optimal degree of deacetylation (DD) which can effectively remove four dyes and chromium ions from textile effluent. Sorption isotherms were carried by varying the treatment time, pH, and initial concentration of dyes or chromium ions. Experimental results were analyzed in three ways: (1) equilibrium sorption capacity and sorption rate constant, (2) Langmuir isotherms, and (3) separation factor. Results indicated that except for the chitin with a 67.2% DD, rate and capacity of the dye sorption on the chitin increased with the increase of the DD in chitin for each pH but decreased with the increase of pH for each deacetylated chitin. This was mainly due to the increase of—NH+3 groups in chitin with a high DD and the low pH of the system. On the contrary, dye desorption from the deacetylated chitin was highly effective at 80° and pH ≥ 10, which could facilitate the reduction of—NH+3 ions and the increase of electrostatic repulsion. The number of chromium ions sorbed on the chitin also increased with the increase of the DD at a specific time. Therefore, by controlling the DD of the deacetylated chitin maximum efficiency can be achieved in the removal of dyes and metal ions from textile effluent. 相似文献