远程学习者学业求助的心理学分析     

董艳  黄月 《现代远距离教育》2011,(1):38-41

学业求助逐渐被研究者作为一种积极的学习策略有助于远程学习者对自我学习过程的促进和管理。本研究通过分析远程学习者所面临的不同求助情境来分析远程学习者的求助心理机制、不同求助行为倾向以及学生所感知到求助支出和结果等因素。研究表明,网络环境中的匿名性和开放性尽管降低了与教师交流产生的窘迫感,但是由于向教师求助所需要付出的支出和预期的收益未必最大,为此向教师求助的往往不是网络中学习者求助的第一选项。网络平台自身的功能是否能满足学习者的求助需要非常重要。为此,本研究在最后从导学和助学两方面对远程学习支持环境的设计进行了建议。  相似文献   

学生学业负担过重的理论缘由探析     

黄首晶 《教育探索》2011,(2)

学生学业负担长期过重是一种具有反教育性的行为。反教育性行为的根本问题首先不是外在的客观制度问题,而是教育深层的理论问题。这一问题的理论根源在于我们长期把书本知识与知识等同了起来。因此,更新书本教育知识观是走出学生学业负担过重困境的重要前提。  相似文献   

台湾职业教育对导游人员的培养方法及启示     

黄刚辉 《职业教育研究》2011,(6):175-176

导游服务的质量已经成为我国旅游业服务质量的一块"短板",而台湾则由于导游的优质服务使旅游业保持了繁荣的局面。在建设海峡西岸经济区、打造海西旅游文化中心城市的大环境下,借鉴台湾先进的教学经验,培养高素质的导游服务人才,提升福建省职业教育特别是导游人员的服务素质和专业水平,是职业教育工作者尤其是旅游专业教师亟待解决和思考的问题。  相似文献   

高校科研管理模式的类型及其发展趋势     

黄争红 《鸡西大学学报》2011,11(7):23-25

科研管理模式是高校科研管理工作的基本思想和方法,其在历史发展中历经了集中型管理模式和服务型管理模式两大类型。现阶段高校科研形势的变化对高校科研管理工作提出了新要求,学习、研究、服务三位一体的管理模式将成为高校科研管理模式的发展趋势。  相似文献   

高校创新团队建设研究   总被引：1，自引：0，他引：1  

郑长江  李悦  武倩楠  马庚华 《科学教育》2011,(6)

本文从创新团队建设的意义入手,通过国内外创新团队建设研究现状,发现创新团队在建设进程中的问题,并针对现有问题提出切实有效的建议。  相似文献   

Leader-following consensus for multi-agent systems with actuator faults via adaptive event-triggered control     

Rui Mu  Airong Wei  Haitao Li  Lu Yue 《Journal of The Franklin Institute》2021,358(2):1327-1349

In this paper, the leader-following consensus problem is investigated by event-triggered control for multi-agent systems subject to time-varying actuator faults. Firstly, for a case of the leader without control input, a distributed event-triggered fault-tolerant protocol is proposed with the help of adaptive gains. Secondly, the proposed protocol is developed by an auxiliary nonlinear function to compensate the effect of the leader’s unknown bounded input. It is shown that under the both obtained protocols the tracking errors converge to an adjustable neighborhood around the origin, meanwhile the Zeno behavior is avoided. Moreover, the protocols are fully distributed in sense that any global information associated with the network is no longer utilized. Finally, numerical examples are presented to show the validity of the obtained protocols.  相似文献   

Impulse-based coupling synchronization of multiple discrete-time memristor-based neural networks with stochastic perturbations and mixed delays     

Huiyuan Li  Jian-an Fang  Xiaofan Li  Tingwen Huang 《Journal of The Franklin Institute》2021,358(1):980-1001

The global synchronization problem of multiple discrete-time memristor-based neural networks (DTMNNs) with stochastic perturbations and mixed delays is studied under impulse-based coupling control, where the coupling control only occurs at discrete impulse times. The impulse-based coupling control will further reduce the communication bandwidth for multiple DTMNNs to achieve coupling synchronization. We construct an array of multiple DTMNNs with stochastic perturbations and mixed delays and propose a novel impulse-based coupling control scheme. By utilizing Lyapunov–Krasovskii functional technique, schur complement technique and linear matrix inequality (LMI) method, some sufficient synchronization conditions depending on stochastic perturbations and mixed delays are established. At the end of this paper, a numerical example is given and the effectiveness of the impulse-based coupling control is illustrated by using MATLAB programming.  相似文献   

Novel delay-partitioning approaches to stability analysis for uncertain Lur’e systems with time-varying delays     

Liang-Dong Guo  Sheng-Juan Huang  Li-Bing Wu 《Journal of The Franklin Institute》2021,358(7):3884-3900

This work deals with the problem of absolute stability analysis for a class of uncertain Lur’e systems with time-varying delays. Novel delay-partitioning approaches are presented, which are dividing the variation interval of the delay into three subintervals. Some new augment Lyapunov–Krasovskii functionals (LKFs) are defined on each of the obtained subintervals which can efficiently make use of the information of the delay and relate to the reciprocally convex combination technique and the Wirtinger-based integral inequality method. Several improved delay-dependent criteria are derived in terms of the linear matrix inequalities (LMIs). The merit of the proposed criteria lies in their less conservativeness and lower numerical complexity than relative literature. Two numerical examples are included to illustrate the effectiveness and the improvement of the proposed method.  相似文献   

Adaptive leaderless consensus control of a class of strict feedback nonlinear systems with guaranteed transient performance under actuator faults     

Wengang Ao  Jiangshuai Huang  Baoyu Wen  Fangzheng Xue 《Journal of The Franklin Institute》2021,358(11):5707-5721

The problem of adaptive leaderless consensus control of a class of uncertain strict feedback nonlinear systems with guaranteed transient performance is investigated in this paper. The system model is a class of strict feedback nonlinear systems with parametric uncertainty, actuator fault and external disturbance. How to guarantee the transient performance of consensus error is involved. To solve this problem, the consensus is transmitted into stabilization of a new variable. Ultimately the consensus errors will asymptotically converge to zero and faster than a given exponentially converging variable. Finally, simulation results show the effectiveness of proposed control scheme.  相似文献   

运动诱导骨骼肌损伤对大鼠骨骼肌线粒体结构和功能的影响     

尚画雨  白胜超  夏志  周越  王瑞元 《北京体育大学学报》2018,41(1):58-63

摘要：目的：探讨大负荷运动对大鼠骨骼肌线粒体形态结构与功能的影响,为研究运动性骨骼肌损伤发生的机理奠定基础。方法：48只成年雄性Sprague-Dawley大鼠,随机分为安静对照组（C,n=8）和运动组（E,n=40）。其中,E组按时相点划分为0 h、12 h、24 h、48 h、72 h等5组,每组各8只。E组大鼠在跑台上进行持续性下坡跑,跑台坡度为-16°,速度为16 m/min,运动时间为90 min。各组分别于对应时间点分离比目鱼肌进行检测。使用透射电子显微镜观察骨骼肌线粒体超微结构变化,采用ELISA方法检测各组大鼠比目鱼肌线粒体关键酶CS的含量以及线粒体呼吸链复合体Ⅱ、Ⅳ的活性,应用Western blot方法检测骨骼肌COXⅠ的蛋白表达。结果：一次大负荷运动后比目鱼肌线粒体出现明显肿胀、肌膜下积聚等超微结构异常变化,且伴有大量不同成熟阶段的自噬体形成,同时CS的含量和呼吸链复合体Ⅱ活性均明显下调（P<0.05）,复合体Ⅳ活性及其亚基COXⅠ蛋白表达也出现下降。结论：一次大负荷运动可导致骨骼肌线粒体结构和功能受损,数量减少,导致细胞氧化磷酸化功能障碍,同时还诱导了自噬的发生,这可能是大负荷运动致骨骼肌损伤的重要原因之一。  相似文献