物理学术竞赛牵引下的大-中学生实验能力协同培养探索

近年来,物理学术竞赛作为物理理论教学与实验实践的创新形式,已在各大、中学校广泛开展,形成了一定的社会影响力.针对当前大学与高中物理实验教学中尚存的衔接性不强、协同培养不足的问题,南开大学基础物理实验教学示范中心以物理学术竞赛作为牵引,以实验能力培养的各项要求作为标准,结合物理学科自身特点,形成基于物理学术竞赛平台的大-...     

高职教育中的功利主义及其防范

高职教育过程中存在着一些功利主义的做法。这些做法片面强调市场导向作用,对学生的人格完善和可持续发展构成潜在威胁。通过模块式培养模式的建构和学分制的实施,使学生能够具备适岗能力,同时又兼顾学生的全面协调可持续发展。     

Mineralogy of the deep lower mantle in the presence of H2O

Understanding the mineralogy of the Earth''s interior is a prerequisite for unravelling the evolution and dynamics of our planet. Here, we conducted high pressure-temperature experiments mimicking the conditions of the deep lower mantle (DLM, 1800–2890 km in depth) and observed surprising mineralogical transformations in the presence of water. Ferropericlase, (Mg, Fe)O, which is the most abundant oxide mineral in Earth, reacts with H₂O to form a previously unknown (Mg, Fe)O₂H_x (x ≤ 1) phase. The (Mg, Fe)O₂H_x has a pyrite structure and it coexists with the dominant silicate phases, bridgmanite and post-perovskite. Depending on Mg content and geotherm temperatures, the transformation may occur at 1800 km for (Mg_0.6Fe_0.4)O or beyond 2300 km for (Mg_0.7Fe_0.3)O. The (Mg, Fe)O₂H_x is an oxygen excess phase that stores an excessive amount of oxygen beyond the charge balance of maximum cation valences (Mg²⁺, Fe³⁺ and H⁺). This important phase has a number of far-reaching implications including extreme redox inhomogeneity, deep-oxygen reservoirs in the DLM and an internal source for modulating oxygen in the atmosphere.     

适应社会需求加强能力培养——高职应用写作教学改革的探讨

应用文的写作能力是现代人能力结构中不可缺少的能力,以应用型高技能人才为培养目标的高职院校应适应社会需求,加大应用写作教学改革的力度,从教学内容体系、教学方法、教学手段到写作训练等方面,探索出培养高职学生应用写作能力的有效途径.     

Transforming,storing and consuming athletic experiences: a coach’s narrative of using a video application

The analysis of sport performance in competitive contexts has become synonymous with the use of a range of software applications and hardware e.g. heart rate monitors and gps systems. With the prevalence of technology in mind, a small but growing corpus of literature has begun to consider this phenomenon and its influence upon the coaching process. This study adds to this literature by detailing the autoethnographic experiences of a case study coach; Derek. A contextualised and richly described narrative account of Derek’s experience of using coaching applications is provided. Analysis of Derek’s narrative suggests that technology can be a useful means by which individuals make sense of their experience. Specifically, (1) technology can be a ‘ready-to-hand’ instrument that enhances the coaching process. Unfortunately, (2) technology may become the only and ‘calculative’ means by which individuals come to understand their performance. In such instances, it is important to note that (3) the videos we use to understand our performance are transformed and incomplete representations of lived athletic experiences. Thus, Derek’s story illustrates how technology can be both an enabler and barrier to athletes who wish to holistically understand their own lived experiences and engage in coach-athlete relationships. The accompanying analysis draws upon concepts from Heideggerian philosophy to add insight into the use of technology within the coaching process. In so doing, the study prompts coaches to critically view their coach-athlete relationships as situated in a wider world which contains, and can be mediated by, technology. In addition, Derek’s story (re)directs researchers and coaching practitioners interested in technology to a useful literature (philosophy of technology) which may further inform their understanding of coach-athlete relationships.     

单项高价值专利评估的综合价值模型研究

[目的/意义]旨在弥补现有专利价值评估方法对高价值专利评估的不足,使专利价值评估体系更加全面.[方法/过程]分析了影响高价值专利"溢价"的主要因素,通过量化高价值专利综合价值的技术质量参数、专利的基本价值参数和综合控制参数值,构建单项高价值专利评估的综合价值模型.[结果/结论]构建的单项高价值专利评估综合价值模型的优点...     

浅论高职院校学生的创业教育

我国高校招生规模不断扩大,社会就业压力也不断增加.通过创业教育来解决高职大学生就业问题是一种行之有效的途径.本文就高职院校如何加强学生的创业教育,鼓励、支持学生自主创业进行了分析与研究.     

Probability Density Function Method for Observing Reconstructed Attractor Structure

Probability density function (PDF) method is proposed for analysing the structure of the reconstructed attractor in computing the correlation dimensions of RR intervals of ten normal old men. PDF contains important information about the spatial distribution of the phase points in the reconstructed attractor. To the best of our knowledge, it is the first time that the PDF method is put forward for the analysis of the reconstructed attractor structure. Numerical simulations demonstrate that the cardiac systems of healthy old men are about 6 - 6.5 dimensional complex dynamical systems. It is found that PDF is not symmetrically distributed when time delay is small, while PDF satisfies Gaussian distribution when time delay is big enough. A cluster effect mechanism is presented to explain this phenomenon. By studying the shape of PDFs, that the roles played by time delay are more important than embedding dimension in the reconstruction is clearly indicated. Results have demonstrated that the PDF method represents a promising numerical approach for the observation of the reconstructed attractor structure and may provide more information and new diagnostic potential of the analyzed cardiac system.     

合成食用色素的性质及分析方法

介绍了6种常用的食用色素的性质及分析方法．     

结构基因组学与蛋白质核磁共振(NMR)光谱

阐述了核磁共振光谱在蛋白质结构基因组学研究中的重要作用,包括核磁共振光谱在结构基因组学研究中的优点和缺点,研究技术进展和展望。