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1.
李景富  张德生 《科技资讯》2007,(17):204-205
随着协作学习理论及网络教育等相关技术的日趋成熟,网络协作学习将会得到广泛的应用。网络协作学习一方面为学习者提供了广阔的学习空间;另一方面,为学习者协作能力的提高,交流能力的锻炼提供了良好的机会。本文介绍了网络环境下协作学习特点及协作学习模式,并对网络环境下基于问题的协作学习模式进行了初步探讨。  相似文献   

2.
随着信息技术的发展,网络为教育带来了新的生机与活力,网络成为学习者学习的重要环境之一。协作学习是网络教育的一种重要学习模式。而Internet作为网络教育的主要媒体,又为协作学习提供了有效的支持环境。如何有效地利用网络环境进行协作学习、提高协作学习的效率,成为理论研究界研究的热点。本文从协作学习的概念入手,分析了网络环境下协作学习的要素、特点,并建构了一种基于网络的协作学习的应用模式,最后提出了目前网络协作学习研究中存在的几个问题。  相似文献   

3.
网络环境下的协作学习模式探析   总被引:2,自引:0,他引:2  
侯英杰 《甘肃科技》2010,26(20):189-190,185
近年来,飞速发展的多媒体技术、计算机网络技术极大地推动了协作学习的发展,网络环境下的协作学习能够激发学习者的学习动机,有利于培养学习者之间的合作交流能力和创新能力,增强互助意识,提高学习效率。就网络环境下的协作学习模式从其内涵、特点、及实施步骤等几个方面进行了探讨。  相似文献   

4.
协作式在线教学以问题探究、知识建构、知识产品创造为旨趣。基于此,从自我建构、协作建构和交互建构3个维度构建协作式在线教学交互模型,揭示学习者与协作小组在线知识流转和协作知识建构的过程,具体包含两个相互嵌套的教学交互圈:学习者个体自我交互圈和协作交互圈。前者表征了学习者内在特征、在线学习行为、在线学习环境的交互关系,阐述了学习者的自我建构过程;后者表征了协作小组内在特征、在线协作学习行为、在线学习环境的交互关系,阐述了协作小组的协作建构过程。两者依托在线学习环境产生交互关联关系,是交互建构的过程。根据协作式在线教学交互模型的启示,学习者/协作小组、交互学习行为及在线学习环境是协作式在线教学交互的内在动力。除此之外,以交互目标、学习产出和交互评价为主的教学设计也是在线教学交互不可或缺的外在动力。教师是协作式在线教学交互动力的设计者、实施者和推动者,应明确自身角色与担当。  相似文献   

5.
随着知识半衰期的持续缩短,终身学习、非正式学习和个性化学习将会成为个人成长和发展过程中内在需求.因此,构建以学习者为中心的,注重学习过程中的交流、互动与协作的网络学习系统成为教育信息化建设中的重要内容.本文首先分析了互联网环境下的学习的特点,讨论了适用于互联网环境下的联通主义的学习理论;然后分析了以学习者为中心的网络学习环境的起源和特征;接下来讨论了面向自主学习的互动式网络学习系统的设计;最后对全文进行总结并展望后续工作.  相似文献   

6.
网络环境下的协作学习探讨   总被引:2,自引:0,他引:2  
随着计算机网络和现代教育理论的发展,现代的教学方法、教学模式将产生重大的变化,网络环境下的协作学习,便是在计算机网络的环境下得以发展的一种教学模式.开展基于网络的协作学习策略和模式的研究,将有助于协作型教学过程的设计与课件开发.  相似文献   

7.
在W ebQuest教学环境下,教学过程与学习者创造性思维的培养有着密切的关系。W ebQuest教学模式是建构主义学习理论在网络学习中的实际运用。W ebQuest教学目标与学习者创造性思维的培养关系密切。基于网络的W ebQuest教学环境下学习者创造性思维培养亦有迹可循。  相似文献   

8.
卢婉丽 《龙岩学院学报》2005,23(Z1):117-119
协作学习已成为一种重要的教学理论.而计算机及网络技术迅速发展,在教育中的应用也引起了人们的普遍关注.本文简要归纳了协作学习的有关理论并结合计算机及网络技术在教学中应用的有关理论,力图探索一种在网络环境下开展中学英语协作学习的有效模式.  相似文献   

9.
E-learning平台上协作学习研究   总被引:1,自引:0,他引:1  
基于Internet的e-learning是新型的远程教学系统,多个学习者的协作学习利用计算机网络和多媒体技术,针对同一学习内容彼此交互合作.在介绍概念特征的基础上,着重分析了协作学习的基本模型和存在的问题,并给出这种学习模型的分析结果.通过e-learning平台教学,可使学生对教学内容深刻理解与掌握.  相似文献   

10.
网络环境下的协作学习是利用信息技术,尤其是多媒体和网络技术辅助和支持协作学习的一种教学模式。基于CSCL的定义和特征,结合信息技术教学现状,探究并设计了基于CSCL的中学信息技术教学的模式。结合一个案例对新型的教学模式进行了实际应用。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

14.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

15.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

16.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

17.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

18.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

19.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

20.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

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