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以高职有机化学课程为例,探讨了抛锚式翻转课堂教学模式的构建和实践。主要包括:课前微课视频的制作、课堂组织、课后拓展、辅导和教学评价等环节。抛锚式教学模式和翻转课堂的结合,可以调动学生学习的主动性和积极性,使学生成为课程学习的主体,有利于有机化学课程的教学,有利于培养更多更好的新时代药学专业技术技能人才。 相似文献
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将翻转课堂教学模式引入到化学证考试辅导中,实践表明,学生对翻转课堂的接受程度很高;学生认为教师提供的教学视频对其课前学习是有用的;学生基本在课前能主动完成课前学习任务和在课中适应课堂学习活动。在较短的辅导时间内,学生对翻转课堂教学模式应用在技能操作辅导中的适应能力大于理论辅导。 相似文献
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概述了多维课堂教学模式及示例导向式的研究型教学设计在医科院校“医用基础化学”课程中胶体分散系章节的应用情况。于我校而言,该部分内容由于授课安排较早,概念性内容偏多,对初入大学还未有完善自主学习能力的学生具有一定难度。因此,教学组精心设计了与医学内容联系紧密、并含本章重要概念的多种示例,同时选取部分知识点邀请临床科室教师录制微课,在授课过程中优选时间节点向学生引入。结果显示,这种结合基础和临床方向、教师以线下和微课教学共同开展的多维课堂教学模式,有助于提高学生的学习兴趣和专注度,使其在有限的学时内掌握章节核心概念,为后续物化及无机方面内容的学习打牢基础。 相似文献
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依托国家级一流本科课程,融合PBL (Problem-Based Learning)开展混合式课堂教学,设计了PBL教学案例——“碳达峰碳中和”中的无机化学问题探究。引导学生从大气中CO2污染产生的化学反应过程入手,分析基于降低碳排放开发的CO2转化新技术的化学反应原理,探讨不同CO2转化技术的优势和劣势。通过PBL教学实践,将化学理论与工业实践深度融合,在夯实理论基础的同时,使学生的学习能力和解决问题能力得到提升。通过思政教育有机融入,使学生了解到我们国家科技的进步,体现课程教学的立德树人。 相似文献
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以上海市“空中课程”中高中化学X教师的线上课堂教学为例,采用SEC一致性分析模式,从核心素养的“证据推理与模型认知”这一视角,对其课堂提问与课程标准的一致性进行了分析。研究表明:(1)从总体上看,X教师的课堂提问与课程标准中的素养之间具有较好的一致性;(2)X教师的课堂提问在证据推理素养层面上与课程标准一致性程度欠佳,而在模型认知层面上与课程标准具有较好的一致性;X教师的课堂中根据具象证据或模型进行推理论证的问题多于课程标准中的素养要求,根据抽象证据进行推理论证的问题较少;(3)从素养水平维度分析,X教师课堂中低素养水平的问题占较大比例,高素养水平的问题少于课程标准要求;(4)上述偏差的产生主要受线上教学的影响,另外还受到考试要求、教师个人对课程标准的理解等因素的影响。 相似文献
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基于云班课,以初中化学复习课“酸的性质”教学为例,尝试JiTT教学模式,实现教与学间的即时互动、资源推送和作业任务,通过云服务实时记录学生的学习行为,实现过程性评价和个性化教学。 相似文献
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木质素及其在高分子材料方面的利用课程教学方法与实践 总被引:1,自引:0,他引:1
木质素是一种重要的天然高分子,其开发利用已成为材料科学的热点之一。木质素及其在高分子材料方面的利用课程内容涉及木质素的结构与性质、木质素化学品、木质素热固性材料、木质素热塑性材料、木质素新材料、木质素材料的性能评价等。针对该门课程知识点多且内容分散、知识面宽、知识点新的特点,提出了教学方法:(1)采用案例教学法,密切联系生产实践;(2)采用翻转课堂教学法,提高学生自学能力;(3)加强双语教学,培养国际化专业人才;(4)采用灵活有效的考核方式,着实提高学生综合能力。 相似文献
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基于偏最小二乘回归的类模型方法用于中药牛黄的真伪鉴别 总被引:1,自引:1,他引:0
针对独立软模式类簇法(SIMCA)在确定主成分数和决策区间时遇到的困难,提出了一种基于PLSR的类模型方法——PLS类模型方法(PLSCM)。通过把类描述问题转化为常见的PLSR问题,采用成熟的蒙特卡罗交互验证法确定模型的隐变量数和决策区间。采用本方法对不同牛黄样品的近红外光谱数据(波长范围4000~9000 cm-1)进行分析,可成功鉴别牛黄的真伪。本方法的可操作性和鉴别准确率均优于经典的SIMCA方法。对于原始光谱数据,PLSCM的训练和预测准确率均为100%,对于经SNV处理的数据,训练和预测准确率分别为99%和100%。 相似文献
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Hua Kuang XiaoLin Hou Hong Miao Gong Zhang JianZhong Shen 《International journal of environmental analytical chemistry》2013,93(6):423-437
Two series of haptens including 3-phenoxybenzoic acid (PBA) and 3-(2-chloro-3, 3,3-trifluoroprop-1-enyl)-2,2-dimethylcyclo-propanecarboxylic acid (CF3MPA) were used to prepare immunogens through attachment of 4-C or 6-C handles. Class selective antibodies were produced by immunising rabbits. Ab502 showed the highest reactivity towards tau-fluvalinate (IC50 1.3 ng mL?1), λ-cyhalothrin (IC50 2.3 ng mL?1), cyfluthrin (IC50 2.2 ng mL?1) and fenpropathrin (IC50 18.5 ng mL?1) among the antibodies in a competitive ELISA. The effects of methanol, pH and salt concentration were optimised for maximum efficiency of the ELISA (Enzyme-Linked ImmunoSorbent Assay). Ab502 (1:80000)/2-OVA-1(0.2 µg mL?1) was chosen for ELISA optimisation. Finally, 0.05 M phosphate buffered saline (PBS) at pH 6.5 containing 30% methanol (v/v) was used to dilute the standards. Target analytes in honey samples were extracted with ethyl acetate by sonication. The samples were spiked with three different concentrations of each compound (tau-fluvalinate, 0.5 ng g?1, 3 ng g?1, 12 ng g?1; λ-cyhalothrin and cyfluthrin 1 ng g?1, 5 ng g?1, 65 ng g?1). The recoveries were 36–59% at the lowest spiking concentration and 61–81% at the higher concentration. This assay might be useful to screen pyrethroid residues in honey or other matrix. 相似文献
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界定了笔记覆盖率的概念,对高中生化学课堂笔记覆盖率与学业成绩、记笔记习惯与学业成绩以及合成变量与学业成绩的相关性进行了检测,并依据检测的结果,提出了帮助学生做好课堂笔记以提升学习能力的教学建议。 相似文献
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Ewig CS Berry R Dinur U Hill JR Hwang MJ Li H Liang C Maple J Peng Z Stockfisch TP Thacher TS Yan L Ni X Hagler AT 《Journal of computational chemistry》2001,22(15):1782-1800
A class II valence force field covering a broad range of organic molecules has been derived employing ab initio quantum mechanical "observables." The procedure includes selecting representative molecules and molecular structures, and systematically sampling their energy surfaces as described by energies and energy first and second derivatives with respect to molecular deformations. In this article the procedure for fitting the force field parameters to these energies and energy derivatives is briefly reviewed. The application of the methodology to the derivation of a class II quantum mechanical force field (QMFF) for 32 organic functional groups is then described. A training set of 400 molecules spanning the 32 functional groups was used to parameterize the force field. The molecular families comprising the functional groups and, within each family, the torsional angles used to sample different conformers, are described. The number of stationary points (equilibria and transition states) for these molecules is given for each functional group. This set contains 1324 stationary structures, with 718 minimum energy structures and 606 transition states. The quality of the fit to the quantum data is gauged based on the deviations between the ab initio and force field energies and energy derivatives. The accuracy with which the QMFF reproduces the ab initio molecular bond lengths, bond angles, torsional angles, vibrational frequencies, and conformational energies is then given for each functional group. Consistently good accuracy is found for these computed properties for the various types of molecules. This demonstrates that the methodology is broadly applicable for the derivation of force field parameters across widely differing types of molecular structures. Copyright 2001 John Wiley & Sons, Inc. J Comput Chem 22: 1782-1800, 2001 相似文献