企业间合作学习、控制方式、创新的关系研究

在交易成本理论以及社会交易的理论框架下,用实证的方法研究合作学习及其控制方式对创新的影响,并分析指出其在联盟管理中的实际意义。     

Coordinating scaffolds for collaborative inquiry in a game-based learning environment

Collaborative inquiry learning affords educators a context within which to support understanding of scientific practices, disciplinary core ideas, and crosscutting concepts. One approach to supporting collaborative science inquiry is through problem-based learning (PBL). However, there are two key challenges in scaffolding collaborative inquiry learning in technology rich environments. First, it is unclear how we might understand the impact of scaffolds that address multiple functions (e.g., to support inquiry and argumentation). Second, scaffolds take different forms, further complicating how to coordinate the forms and functions of scaffolds to support effective collaborative inquiry. To address these issues, we identify two functions that needed to be scaffolded, the PBL inquiry cycle and accountable talk. We then designed predefined hard scaffolds and just-in-time soft scaffolds that target the regulation of collaborative inquiry processes and accountable talk. Drawing on a mixed method approach, we examine how middle school students from a rural school engaged with Crystal Island: EcoJourneys for two weeks (N=45). Findings indicate that hard scaffolds targeting the PBL inquiry process and soft scaffolds that targeted accountable talk fostered engagement in these processes. Although the one-to-one mapping between form and function generated positive results, additional soft scaffolds were also needed for effective engagement in collaborative inquiry and that these soft scaffolds were often contingent on hard scaffolds. Our findings have implications for how we might design the form of scaffolds across multiple functions in game-based learning environments.     

股权集中度、经理人激励与技术创新选择

基于委托代理理论及技术创新理论,探讨股权集中度对企业技术创新选择的影响。以182家制造企业及高新技术企业数据为样本,利用因子分析及结构方程模型对相关假设进行检验。结果表明:(1)经理人激励在股权集中度和技术创新之间具有中介效应;(2)股权集中度和经理人短期薪酬激励呈负相关,和经理人长期薪酬激励呈正相关;(3)短期薪酬激励不利于突变创新,长期薪酬激励有利于突变创新和渐进创新。     

人工智能时代大学教学范式再造的依据、方向与进路——基于创造性破坏理论的分析

人类社会正在步入人工智能时代,人工智能技术业已展现出颠覆各行业秩序的重构性力量。大学教学范式是否亦然被重构,人工智能技术能为大学教学范式变革提供何种可能等问题亟待厘清。基于创造性破坏理论,本研究通过对大学教学范式运作的价值网络进行扫描发现,延续性创新力量难以有效驱动大学教学范式变革,“知识即力量”的实践误读、去标准化教学的“持久战”、反馈功能弱化的超稳态及以“学”为中心理念的悬浮等变革困境阻碍大学教学范式的更迭跃迁,大学教学范式变革急需创造性破坏力量。人工智能技术与大学教学范式核心要件的整合能够激发逆转教学范式变革困境的创造性破坏力量,重塑教学价值的生成与表达方式,推动大学教学从“教”的范式向“学”的范式转换。大学教学新范式具有较大的收益递增潜力,其生成性的教学理念抑制信息传递的变异,非线性的教学方法激活学生转识成智的动力,融合式的教学内容降低知识创新的边际成本,增值式的教学评价提高教学资源的配置效率。为使大学教学范式走出变革困境并实现再造,大学教学共同体须坚守“通专融合”的人本教育,秉持用以致学的学习观和认知指导的教学观,重构教学治理技术与制度。     

基于变速积分的无刷直流电机PID控制系统

设计了以TMS320F28335控制器和PM100CLA060智能功率模块为基础的无刷直流电机控制系统,详细介绍了霍尔位置传感器和增量式光电编码器接口电路的设计方案和实现功能.采用变速积分PID控制算法,实现了转速和电流的双闭环调节.该控制系统具有硬件结构精简、调节精度高及响应速度快等特点,便于高效可靠地运行.     

翻驳领前门形制与松量关系的研究

对服装设计制作中的翻驳领前门形制与松量关系进行了研究。通过分析叠门与驳止点关系,找出两者内在的共同结构,然后通过展切法建立实验模型,得出了驳止点的位置的提升与翻领松量的变化呈线性增加,且在一定条件下增量基本保持不变的规律,建立了领面领座差值与腰节距松量增量系数对照表,可提高翻驳领松量计算的准确性和生产效率。     

Discriminant and incremental validity of self-concept and academic self-efficacy: a meta-analysis

Two studies examined the discriminant and incremental validity of self-concept and academic self-efficacy. Study 1, which meta-analysed 64 studies comprising 74 independent samples (N?=?24,773), found a strong mean correlation of .43 between self-concept and academic self-efficacy. The domains of self-concept and self-efficacy, and the domain matching between them, moderate the strength of the correlation between self-concept and academic self-efficacy. Global self-concept was associated with weaker correlations than were academic and subject-specific self-concept. Academic self-efficacy had higher incremental validity than self-concept. Study 2, which examined data-sets from Programme for International Student Assessment 2000, 2003 and 2006, found that the mean correlation ranged from .31 to 54. Self-concept sometimes had higher incremental validity than academic self-efficacy. The higher incremental validity of self-concept may result from the wording and domain of self-concept measure as well as specificity matching between self-concept and academic achievement.     

数据仓库预聚集增量更新的研究

数据仓库通常都包含预聚集。当数据源发生更新时,数据仓库及预聚集也必须随着更新。为了提高查询性能,重点探讨数据仓库预聚集更新问题,给出了预聚集更新的处理流程,并针对事实表更新及维表更新设计了相应的预聚集增量更新算法。     

递增负荷运动训练对大鼠红细胞及血红蛋白的影响

以大鼠为研究对象,通过跑台建立大鼠递增负荷的运动模型,探讨长期运动对机体血细胞参数和血红蛋白含量的影响。结果显示一次性运动后大鼠的红细胞破坏增多,红细胞计数减少,随着负荷的逐渐增加,RBC显著下降,在第五周运动后降至最低;平均红细胞容积的变化则与红细胞总数变化相似,说明可综合RBC、MCV与血红蛋白来评定运动性贫血。一次性运动后即刻,血红蛋白水平有所升高,然后逐渐恢复到正常水平,说明运动导致机体脱水,血浆减少,血液浓缩,但这只是一种相对升高。五周递增负荷运动后血红蛋白含量有逐渐降低,在第五周降至最低,且不能恢复到正常水平：说明长期坚持高强度大运动量训练,如果恢复时间不多,则会出现明显的血红蛋白下降,导致运动性贫血,严重影响运动员的运动能力和恢复能力．     

供应商参与对制造商产品创新模式影响的分析

阐明了制造商产品创新的分类和供应商参与的优势,并且基于供应商参与产品创新的阶段将其划分为供应商前期参与和供应商后期参与两种类型,分析了不同供应商参与阶段对制造商产品创新的影响.结果表明,供应商前期参与有利于制造商突变式产品创新的实现,而供应商的后期参与则有利于制造商渐进式产品创新的实现.