E-Learning环境下引领式学习模式初探

介绍了3种混合式学习模式,引入了混合式学习模式下的新的学习模式--引领式在线学习模式,提出了引领式在线学习模式教师引领的5个阶段的教学策略.     

基于移动Agent的交互远程学习模型研究

在对当前远程学习模式探讨的基础上，提出了一种新的基于移动Agent的交互远程学习模型，这种模型采用当前分布式人工智能中的流行的移动Agent技术，较好的实现了交互式远程学习模式，解决了远程交互式学习中的及时性和灵活多样性、个性化和准确性等问题。     

运用现代信息资源建立自主学习模式探究

从建立自主学习模式的主要目的、建立自主学习模式的主体构想两个方面,阐述了建立自主学习模式的关键途径和重要功能.     

基于网络的协作学习环境探讨

协作学习目前已经成为课堂教学与互联网络环境下一种非常重要的教学模式，它对于培养学生的创造能力、求民思维，批判思维、探索发现精神、与学习伙伴的合作共处能力，自瘭自强和培养新世纪需要的创新型人才非常重要，许多国家的教育实践中都已非常重视协作学习教学模式的应用。本文介绍了协作学习与协作学习模式，探索了协作学习的基本理论，并对协作学习模式下的教学设计进行了初步探讨。     

建构数学课堂自主学习模式

学会学习，使学生具有适应终生学习的基本技能和方法，是新一代基础教育课程的目标之一。“自主学习”的课堂模式，是指学生在学习活动之前能够对学习进展、学习方法，作出自我监控、自我反馈和自我调节，在学习活动之后，能够对学习结果进行自我检查、自我总结、自我评价和自我补救的学习模式。那么如何建构数学课“自主学习”课堂模式呢？     

基于信息检索、分析和交流的学习模式

信息时代的互联网已经成为了一个巨大的知识库,为培养软件工程学生对知识的理解、应用、分析、综合和评价的教育目标提供了一个新的实践学习平台。文中结合网络技术和多媒体技术,基于对信息检索、分析和交流能力的培养,提出包含自主学习和协同学习的一种创新性学习模式。在该学习模式中,老师充当旗手,学生是知识学习的主力军,开拓者和创造者,同时也为毕业设计和课程设计提供了有力支撑。     

关注学生学习习惯,引导学生研究性学习

对当代大学生存在的"听书模式"代替"读书模式"、"搜索知识"代替"学习知识"、"虚拟场景"代替"现实场景",以及把课堂教学变成了学分收割场等学习行为进行了分析。提出了加强解决人才培养模式中的众多关系,以提高学生主动学习、研究性学习的基本思想。同时,介绍了电子科技大学建立校院两级学生科创活动中心,建设系列创新实践课程,用以解决学生学与习的问题,改进和提升学生学习主动性和研究性的成功经验。     

学习模式与学风建设

在阐明了大学生学习模式与学风建设关系的基础上，分析了当前大学生学习模式的特点及对学风的影响，并就改进学习模式，促进学风建设方面提出了对策。     

泛在学习环境下的APP学习系统功能设计

信息技术、移动网络等技术形成了泛在学习环境,带来了新的学习模式、学习方式、学习观念的变革,如何在泛在学习环境下设计符合手机的APP学习系统成为了新问题。以泛在学习理论为指导,对泛在学习环境下APP学习系统提出了总体的框架模型,宏观设计了泛在学习环境下由学习系统、管理系统和资源库组成的APP学习系统方案。从学习者在泛在学习环境下学习模式和学习观念的角度,微观设计了3个学习活动支持功能,并对系统功能在泛在学习环境下如何实施做了进一步的阐述,为系统功能开发做好了准备。     

技术范式转变时期的组织学习研究

本文针对技术范式转变这一管理特征极为丰富的特殊时期,研究组织学习的模式与演化特征。提出了包括学习与忘却学习的组织学习的新内涵,构建出技术范式转变时期以忘却学习为主导,学习与忘却学习交互的组织学习模式。并从组织知识特性、知识类型、学习层次、忘却学习层次、组织学习层面以及组织学习工具六个方面对技术范式转变时期组织从学习到忘却到再学习的动态演化进程进行阶段研究。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

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.     

A computer generator for randomly layered structures

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

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.