颠覆性创新的价值系统分析——以广东省LED照明行业为例

在综述颠覆性创新理论的基础上,从价值系统的角度构建了一个用于颠覆性创新的分析框架。基于该框架,本文总结了广东省LED照明颠覆传统照明的表现形式,分析了传统照明在位企业落后的原因,并提出了广东省LED照明行业发展的政策建议。     

University students' need satisfaction trajectories: A growth mixture analysis

This study examines trajectory profiles of University students over the course of a University semester defined based on global levels of psychological need satisfaction, as proposed by self-determination theory (SDT). This study also documents the implications of these trajectories for a variety of educational outcomes. A sample of 461 first-year undergraduates completed all measures three times over the course of a University semester. Longitudinal growth mixture analyses (GMA) revealed three distinct need satisfaction trajectories (Low-Decreasing, Moderate-Decreasing, and Moderate-Increasing). The Moderate-Increasing profile was associated with the highest levels of positive affect and effort. In contrast, the Low-Decreasing profile was associated with lower levels of positive affect, effort, and achievement, and higher levels of negative affect than the Moderate-Increasing profile.     

Cl+H_2→HCl+H反应的矢量相关研究

基于新的LEPS势能面,初始碰撞能为12kcal/mol的条件下,用准经典轨线法研究了Cl+H2→HCl+H的反应。理论计算了广义极化微分反应截面PDDCS、k-j′两矢量相关的p(rθ)分布、k-k′-j′三矢量相关的p(φr)分布以及表示产物转动角动量空间分布的p(θr,φr)。结果与有关实验和理论符合得很好,再现了反应过程和生成物的分布特点。     

Coalescence Behaviors of Drop Swarms on Liquid-Liquid Interface

The trajectory model of dispersed phase drops and distribution model of drop diameters were derived.By numerical simulation,the analytical results indicate that a large number of dispersed phase drops accumulate on the upper plate in different directions and form a hydrodynamic area with the stream-wise location in the range of 0—0.4m,where the flow of trickling film obtains kinetic drive from flowing field.The flowing field of trickling film exhibits an unstable state if the stream-wise location is less than 0.02m,and a stable state otherwise.Moreover,different velocity vectors of drops in the x-y plane result in different interactions between the trickling film and drops.For the non-uniform distribution of drop diameters,there is a stronger interaction between the trickling film and drop if the stream-wise location is less than 0.02m,because the amplitudes of velocity vectors are higher than those in the range of 0.02—1.0m.The result reveals a complexity and diversity of stratified two-phase flowing field.On the other hand,both the basic flowing field and distributions of drop diameters have a great influence on the distributions of comparable kinetic energy of drops.The complicated motions of larger drops are helpful to coalescence because they will consume much more kinetic energy on the trickling film than those of smaller drops.The change of comparable kinetic energy of smaller drops is continuous and steady.The smaller drops are easily entrained by the liquid-liquid flowing field.     

甲烷与氧和氯反应的对比研究

运用准经典轨道线法,在扩展的LEPS势能面(London Eyring Polanyi Sato)上对CH4+O和CH4+Cl反应的立体动力学矢量相关性质进行了对比研究,理论计算了广义极化微分反应截面(2π/σ)(dσ00/dωt)、k-j′两矢量相关的p(θr)分布和k-k′-j′三矢量相关的p(φr)分布以及表示产物转动角动量空间分布的p(θr,φr)。计算结果与有关实验及理论符合,很好地描绘了该类反应的产物分布特点。     

学术图书馆数据馆员职业发展状况的调查与分析

[目的/意义] 探索采用职业社交网络数据进行员工导向型工作分析的可能性,为加强我国图书馆人力资源开发、数据馆员教育培训和职业生涯规划提供参考。[方法/过程] 构建基于LinkedIn的数据馆员工作分析模型,通过数据挖掘和可视化展示分析数据馆员岗位分布、发展阶段、教育背景、职业技能和职业成长轨迹。[结果/结论] 研究表明,美国的数据馆员从业人数和设置该职位的机构数量最多。以拥有博士硕士学位者为主的数据馆员群体呈现明显的多学科特征,更加强调具备数据管理和分析等相关技能。专业学位教育和在线开放教育成为数据馆员知识能力培养的两种途径。从职业经历上看,稳定和良好的职业前景使数据馆员成为极具发展前途的职业。     

一种类人型机器人踢球时腿部轨迹规划实验方案

提出一种类人型机器人踢球时腿部运动的轨迹规划实验方案。在分析人踢球技术要点的基础上,综合考虑机器人的动力学模型和关节电机力矩约束,得出机器人踢球时的最大速度,用五次样条曲线规划出关节空间的平滑运动轨迹,并保证一定的加加速度,不易引起振动。     

Approaching functions: Cabri tools as instruments of semiotic mediation

Assuming that dynamic features of Dynamic Geometry Software may provide a basic representation of both variation and functional dependency, and taking the Vygotskian perspective of semiotic mediation, a teaching experiment was designed with the aim of introducing students to the idea of function. This paper focuses on the use of the Trace tool and its potentialities for constructing the meaning of function. In particular, starting from a dynamic approach aimed at grounding the meaning of function in the experience of covariation, the Trace tool can be used to introduce the twofold meaning of trajectory, at the same time global and pointwise, and leads students to grasp the notion of function.     

基于主题变迁的领域发展路径智能化识别——以人工智能为例

[目的/意义]识别领域发展路径对于科技创新具有重要意义,但现有方法如专家访谈、引文分析等不能适应文献爆发性增长的现状,针对这一问题,提出一种基于主题变迁的领域发展路径识别方法。[方法/过程]该方法可以自动从Aminer平台获取数据,通过构建关键词-学者矩阵,综合使用KMeans++和谱聚类算法识别出研究主题和相关学者;通过相似度计算实现不同主题之间的关联,最终获得研究领域的发展路径并进行可视化展示。[结果/结论]通过对人工智能领域的实证分析,结果表明该方法能够有效反映领域研究主题的变迁,有助于研究者快速定位领域的研究热点和重点,丰富领域发展路径相关的研究方法。     

近年来列宁社会主义建设理论研究述评

本文从列宁社会主义建设理论的阶段划分、历史轨迹等方面进行研究综述。在新的社会主义建设时期,重温这些理论思想,研究和学习列宁社会主义建设理论,对于我国的改革开放,建设有中国特色社会主义不无裨益。