三维虚拟仿真技术在锂离子电池实验教学中的应用

把三维虚拟仿真技术引入到锂离子电池实验教学中,制作了锂离子扣式电池制作与性能测试虚拟仿真实验,介绍了仿真实验的设计过程。该仿真实验使用3Ds Max软件构建仪器和工作原理的模型及动画,用Unity3D软件构建一个高度仿真的虚拟实验室场景并模拟了实验操作的整个流程,使操作者可以轻松完成锂离子扣式电池制作与性能测试虚拟仿真实验过程。三维虚拟仿真技术在锂离子电池实验教学中的应用,可以弥补锂离子电池传统实验教学的不足,提高学生学习兴趣,丰富课堂实验教学手段,有效提高教学质量和教学效果。     

加压氢化反应虚拟仿真实验的建设与应用

为扩大加压氢化这一实用技术在本科教学中的应用,使学生能够熟练使用氢气这种易燃易爆气体,提出并建设了加压氢化反应的虚拟仿真实验。基于三位诺贝尔奖获得者在氢化反应领域的相关工作,开展加压氢化反应的虚拟仿真实验。该实验建设包括仿真软件资源、学习共享平台、移动端学习资源、流程建设、评价体系建设,充分发挥虚拟仿真技术在化学化工领域中的作用,为一些难以在教学中开展的化学化工实验课程开辟了新的道路。     

常态化疫情防控下的仪器分析实验教学实践的探讨

结合仪器分析实验的特点和教学中存在的问题,阐述了虚拟仿真技术应用于仪器分析实验教学对线下实验的补充作用,并介绍了虚拟仿真实验教学在应对"停课不停学"等特殊状况的出色表现,通过问卷和互动反馈,准确评估学生的学习状况,指出虚拟仿真实验的局限性,提出线上虚拟仿真与线下课堂实验相结合的教学模式,促进仪器分析实验教学质量的提升。     

线上线下融合的仿真实验软件(电子书)研发及其教学应用——以毛细管电泳实验为例

以Web设计语言和Photoshop、Flash、3D Max等工具绘制动画和3D仿真图,自主研发了毛细管电泳实验的仿真实验软件(电子书)。对仿真实验软件的设计思路、功能模块的实现、教学应用和效果等作了详细叙述。开发的电子书涵盖了实验原理、仪器介绍、样品制备、仪器参数设置、样品测试、数据处理、实验报告等完整的实验流程。电子书的内容完全与我院现行“仪器分析实验”的真实实验和纸质版教材相匹配,从而实现了“虚拟实验”与“真实实验”相融合,线上线下实验教学相融合。电子书中丰富的动画、仿真和实物图片,充分发挥出视觉效应和感观思维的优势,很好地克服了传统实验教学中的时空限制以及纸质版教材单调枯燥的不足,极大地激发学生的学习积极性,提高了学生的学习兴趣和学习效率。     

虚拟实验技术在化学实验教学中的应用与实践

虚拟实验技术是在虚拟现实技术基础上发展起来的一种新型实验教学模式,它利用仿真、网络、传感、多维动画等技术弥补了真实实验危险、耗时长、现象不明显等不足,特别是在微观展示、反应机理模拟以及易燃易爆等实验教学上有着不可替代的作用。采取抽样调查、问卷、访谈等方式调查了我国虚拟实验在化学实验教学中的应用现状,并通过案例实践验证了虚拟实验在化学实验教学中的作用与成效。     

基于虚拟仿真技术的热分析实验教学探索与实践*

针对热分析实验教学,设计和开发了热分析仪虚拟仿真实训系统,提出了一种新的基于虚拟仿真技术的仪器分析测试类实验课教学模式,并将其应用于实际的实验教学中。对随堂实验教学质量进行了调查,结果表明此种实验教学模式很大程度上提升了学生自主学习的兴趣,提高了学生的综合实践能力。     

基于虚拟仿真实验的氰化浸金教学研究

氰化浸金实验由于实验原料包含剧毒化学品而无法向本科生开放实验室实验。通过引入虚拟仿真实验教学,打破了这个壁垒。主要介绍了氰化浸金虚拟仿真教学实验的设计思路、系统实现以及仿真实验的教学实现过程,通过对学生学习动机、课程体验、学习效果3个方面的调查客观地进行了系统评估,评估结果显示学生普遍能通过该软件完成氰化浸金实验的学习,获得对氰化浸金实验的原理、流程及主要参数影响方面较好的理解。     

线上线下混合式"仪器分析实验" 课程实践与思考——以气相色谱实验为例

在新型冠状病毒肺炎疫情期间,由于学生无法返校,中国科学技术大学化学实验教学中心仪器分析实验课程组利用自主开发的大型仪器虚拟仿真软件,应用"智慧课堂"教学模式,进行了线上教学与实验;在学生返校后,又开展了真实实验。本文介绍了该次实验课程开展过程中的线上线下教学活动及教学效果总结,提出了对于线上线下混合式一流课程建设的一些思考。     

物理化学融合实验的设计与教学——以电动势测定实验为例

适应新时代社会经济的发展,需要加强创新型、应用型、技能型人才的培养,并将其落实到学生学习的全过程。在化学实验教学中,以全面的化学教育观为指导,针对验证性实验开展融合实验改革是一种有效策略。以物理化学电动势测定实验为例,这一改革旨在将验证性实验教学内容拓展为仿真实验、基础实验、探究实验、综合实验融为一体的仿真嵌入式实验——融合实验,通过引入虚拟仿真技术、教师自制仪器、教师科研成果等元素,发挥科研与教学的协同效力。融合实验的教学过程秉持学生中心,鼓励自主探究,注重思政渗透,强化科学方法和思维的训练,体现出鲜明的“产出导向”,对提高人才培养质量具有比较明显的作用。     

微视频技术在基础化学实验教学中的实践应用

以高校基础化学实验"从海带中提取碘""三草酸合铁（Ⅲ）酸钾的制备"为例，分别探讨了微视频技术在化学基本操作实验和综合设计型实验中的具体应用；此外，举例说明利用Flash软件制作的虚拟微视频可以在仪器分析实验中清晰地再现仪器真实操作中的每一个步骤，弥补了学生在实验前无法实际操作仪器的不足。实践证明，微视频技术的应用，丰富了基础化学实验教学模式，增强了学生自主学习的能力和动手能力，提高了实验成功率和实验教学效果。     

3D打印在分析化学中的应用研究

3D打印是一种以计算机三维设计数字模型文件为基础,运用特殊可粘合材料,借助光固化和纸层叠等方式逐层打印的,一种快速成形构造物体的新技术.本文侧重从色谱仪器分析、电化学仪器分析、原子分子光谱和质谱仪器分析等方面评论了近年来3D打印在分析化学中的应用研究,为现代仪器分析研究提供借鉴参考,以使3D打印技术和分析化学学科交叉融合协同发展.     

原位变温X射线衍射虚拟仿真实验建设与实践

原位变温X射线衍射实验是物理、化学等相关专业综合和创新性实验项目,基于“以虚代实,虚实结合”的思想开发原位变温X射线衍射虚拟仿真实验系统非常必要。本系统完整地模拟了仪器认知、样品测试、数据计算及应用等实验实景,教学中采用线上线下虚实结合的教学方法,培养学生利用大型仪器解决复杂问题的综合能力和高级思维。     

Computer-assisted learning using a dialogue system for virtual teacher-student communication

Over the past decade, computer-assisted learning in the field of chemistry has given rise to a large number of systems that approach this objective from different viewpoints: static courses aimed at specific concepts, tutorial systems, 2D and 3D virtual environments, and so on. Correct structuring and representation of the knowledge to be taught, the building of a suitable student interface, and the adaptation of the learning process to the knowledge of the student are but a few of the challenges to be faced in the development of efficient computer-assisted learning systems. The present study tackles the use of computerized dialogue systems as a viable alternative for the simulation of teacher-student interaction and proposes an ontology for the characterization of such interaction, employing the object-oriented paradigm in the modeling of both the knowledge to be taught and the actual level of the student. The proposed solution is based on the representation of the knowledge to be taught through a network of multiconnected knowledge frames (chunks), where each chunk may be specialized in more specific frames (prerequisites and subobjectives), contain associated explanations of varying complexity and with a range of explanatory models, and be associated with one or a set of possible questions the student might ask; to this end, a constantly evolving knowledge model is maintained throughout the explanatory process. Based on the proposed model, Java was used to develop and manage an explanatory system that could be used in any type of teaching system based on student-dominated dialogues. Here, the system has been applied to the teaching of chemistry laboratory practice by its integration into the Virtual Chemistry Laboratory (VCL), a system designed by the authors to simulate chemistry techniques in a virtual 3D world.     

生物质裂解产物的制备及HPLC检测其成分的虚拟仿真实验开发

In order to improve university laboratory teaching and practical education under the background of information technology, as well as overcome the difficulty for practical training, develop a virtual simulation experiment platform for rapid pyrolysis of natal materials and high-performance liquid chromatographic (HPLC) detection of its components. The experiment integrates the actual operation process of the plant to produce cleaved products by rapid pyrolysis of biomass with HPLC detection. The virtual experiment is divided into biomass sample pretreatment, rapid biomass pyrolysis, bio-oil extraction, and HPLC determination of complex components, making the biomass cleavage workshop "real" through simulation. This virtual simulation experiment fully integrates the utilization of biomass resources and basic chemistry courses (such as organic chemistry, instrumental analysis, chemical engineering principles, etc.), which are widely involved in agricultural and forestry majors with advantageous characteristics value.     

Divergent Chemistry Paths for 3D and 1D Metallo-Covalent Organic Frameworks (COFs)

The marriage of dynamic covalent chemistry (DCC) and coordination chemistry is a powerful tool for assembling complex architectures from simple building units. Recently, the synthesis of woven covalent organic frameworks (COFs) with topologically fascinating structures has been achieved using this approach. However, the scope is highly limited and there is a need to discover new pathways that can assemble covalently linked organic threads into crystalline frameworks. Herein, we have identified branching pathways leading to the assembly of three-dimensional (3D) woven COFs or one-dimensional (1D) metallo-COFs (mCOFs), where the mechanism is underpinned by the absence or presence of ligand exchange.     

Three-dimensional nanofabrication with elastomeric phase masks

This Feature Article reviews recent work on an optical technique for fabricating, in a single exposure step, three-dimensional (3D) nanostructures with diverse structural layouts. The approach, which we refer to as proximity field nanopatterning, uses conformable, elastomeric phase masks to pattern thick layers of transparent, photosensitive materials in a conformal contact mode geometry. Aspects of the optics, the materials, and the physical chemistry associated with this method are outlined. A range of 3D structures illustrate its capabilities, and several application examples demonstrate possible areas of use in technologies ranging from microfluidics to photonic materials to density gradient structures for chemical release and high-energy density science.