高中生原电池模型认知能力测评工具开发及其应用研究*

基于模型认知能力的内涵、原电池核心知识内容、布鲁姆教育目标分类学,构建原电池模型认知能力研究框架,设计开发测评工具。该测评工具经过试测、修正、再测、质量论证,最终确定。选取S市2所县级中学419名高中生为研究对象展开调查,基于所获得的有效数据,对高中生原电池模型认知能力水平进行分析,重点对高二、高三学生原电池模型认知能力进行了比对,依据研究结果,提出发展高中生原电池模型认知能力的建议。     

化学学科思想研究文献的统计分析——基于中国知网中文数据库的分析

从文献基本信息、作者所在区域、作者单位、作者合作情况、文献研究内容等5个方面对2002-2016年从中国知网检索到的104篇有关化学学科思想的研究文献进行详尽地统计和分析。结果显示：（1）研究论文数目逐年增加,但总数依然较少;（2）研究群体相对集中,但尚未形成稳定核心作者群;（3）研究内容覆盖面广,但缺乏实证性和高站位。启示如下：（1）拓展研究者的范围,加强合作研究;（2）优化研究内容,创新研究方法。     

基于扎根理论的化学师范生顶岗实习实践性知识发展研究

基于扎根理论，从顶岗实习的视角，运用质的研究方法，对化学专业师范生顶岗实习过程中实践性知识的发展路径及阶段性特征获得以下理性认识：（1）顶岗实习过程中化学专业师范生实践性知识发展的路径主要有：理论与实践的冲突与融合，个人经验的积累与建构，他人经验的参考与借鉴，活动参与的反思与提升，团队智慧的碰撞与交流，实习环境的熏陶与促动。（2）顶岗实习过程中化学专业师范生实践性知识发展呈现一定的阶段性特征：顶岗实习前期，化学专业师范生实践性知识的发展具有较为明显的个体性、理想性、冲突性、借鉴性特征；顶岗实习后期，化学专业师范生实践性知识的发展则具有较为明显的针对性、融合性、迁移性和验证性特征。基于研究结论提出关于师范生实践性知识生成与发展的几点建议。     

Synthesis and chiral recognition of novel chiral fluorescence receptors bearing 9-anthryl moieties

Two chiral fluorescence receptors 1 and 2 have been synthesized, and their structures characterized by IR, ¹H NMR, MS spectra and elemental analysis. The chiral recognition of the receptors was studied by ¹H NMR and fluorescence spectra. The results demonstrate that the receptors and tetrabutylammonium mandelate formed a 1:1 complex. Two receptors exhibit good chiral recognition abilities towards the enantiomers of tetrabutylammonium mandelate.     

Using Lanthanum Fluoride Fine Particles as Stationary Phase for Thin-Layer Chromatography/Fourier Transform Infrared Spectroscopy Analysis

JPC – Journal of Planar Chromatography – Modern TLC - While in situ TLC/FTIR technique has tremendous potential in the analysis of complex mixtures, the conventional stationary phase,...     

Hydrothermal synthesis and lithium-intercalation properties of MoO2 nano-particles with different morphologies

Different morphological MoO₂ nano-sized particles were synthesized by a low temperature hydrothermal reaction as a novel method. The physical characterizations were carried out by IR, TG/DTA, XRD, XPS, SEM, TEM and SAED. XRD and XPS data indicate the as-prepared samples present at pure phase MoO₂ with monocline symmetry. Spherical, sheet-like and bar-shaped nano-particles are observed by SEM, respectively. The lithium-intercalation properties of spherical MoO₂ powders were investigated by XRD, TEM and SAED in the light of bulk MoO₂. The results showed an irreversible phase transition after the initial discharge process, which is obviously different from the bulk sample.     

环域反馈下复Ginzburg-Landau系统的螺旋波动力学行为

针对自激振荡系统的复金兹伯格-朗道(Complex Ginzbury-Landau, 简称CGL)方程, 研究圆形环域与方形环域两种反馈控制下的螺旋波动力学。结果表明: 圆形环域反馈控制下, 螺旋波波头通常经过一段过渡漂移后进入圆形吸引子, 圆形吸引子的半径以及反馈刚启动时波头的漂移方向随环域参数呈周期性变化, 过渡漂移阶段波头轨道的平缓程度与复反馈信号模的时间函数中钟形部分的陡度有关, 且反馈增益的正负与大小也会影响受控螺旋波的动力学行为。方形环域反馈控制下的螺旋波波头的吸引子更为丰富, 主要包括方形吸引子、小的极限环吸引子、菱形吸引子以及点吸引子, 点吸引子通常位于方形环域的两条对角线上, 且波头运动随环域控制参数呈现规律性变换。     

Remote preparation for single-photon state in two degrees of freedom with hyper-entangled states

Remote state preparation (RSP) provides a useful way of transferring quantum information between two distant nodes based on the previously shared entanglement. In this paper, we study RSP of an arbitrary single-photon state in two degrees of freedom (DoFs). Using hyper-entanglement as a shared resource, our first goal is to remotely prepare the single-photon state in polarization and frequency DoFs and the second one is to reconstruct the single-photon state in polarization and time-bin DoFs. In the RSP process, the sender will rotate the quantum state in each DoF of the photon according to the knowledge of the state to be communicated. By performing a projective measurement on the polarization of the sender’s photon, the original single-photon state in two DoFs can be remotely reconstructed at the receiver’s quantum systems. This work demonstrates a novel capability for longdistance quantum communication.