自主学习自主发展研究与实验

在启发式教学原则中，强调要充分发挥学生的主体作用，自主学习；鼓励学生发表不同的意见，从不同角度思考问题。在教学方法中明确提出培养学生的创新精神和实践能力。采用启发式，讨论式，和研究性学习等方式进行教学。在教学内容中，增加了探索和创新的内容。     

浅谈启发在物理课堂教学中的运用

在物理教学中 ,适时而恰当地采用启发式教学方法 ,对有效培养学生的思维能力和创造能力具有十分重要的作用。启发式教学不仅能循序渐进地引导学生学会学习 ,而且能充分体现以教师为主导、以学生为主体的精神。教师在运用启发式教学的过程中 ,应根据不同的课题类型和不同的教学情境 ,精心设计启发的具体思路 ,以期达到最佳的教学效果。现根据自己的教学实践 ,谈一下几种常见的启发方式在课堂教学中的运用。一、主线启发式根据一节课的教学目的和知识结构 ,可以设计几条不同的主线。对几条主线进行权衡比较 ,优先选择最适合启发式的教学主线。…     

学思结合的课程教学实践

学思结合即是改变学生被动接受的学习方式而偏重于记忆和理解.启发式、探究式、讨论式、参与式教学是实现学思结合的有效教学方式.其中,核心是启发式教学,讨论式教学则是对启发式教学效果的深化及评价.教师在教学过程中以启发学生的思维为核心,同时通过讨论的方式调动学生的学习积极性和主动性,以达到学思结合的教学效果.     

启发式在计算机语言教学中的应用

启发式教学方法是各种教学方法的灵魂,这种教学方法符合由感性到理性、由现象到本质的认识规律,融入了过程式教学思想。在计算机语言教学中利用启发式教学方法,充分调动学生学习的积极性、主动性和创造性,引导学生通过自己的独立思考,在学习计算机语言的过程中能够举一反三、横向联合,融会贯通地掌握系统的计算机知识,培养学生分析问题和解决问题的能力,发展智能,增强自学能力。     

浅析启发式教学在生物课中的运用

启发式教学,是指在教育教学中对难以理解的内容进行教学授课时,教师可以根据学生已有的一些感性认识,引导他们一步步地推敲和理解,从中获得知识.启发式教学的优点是既能激发学生智力活动的积极性,又能唤起他们的求知欲望,特别适合中学的生物教学,是一种优化的教学方法.通过启发式教学能够提高学生对于生物知识的学习能力和思考能力,拓展学生的实践思维,进而使生物教学质量达到预期的良好效果.     

综合利用多种教学手段提高《信号与系统》教学质量

综合利用多种现代教育技术和现代教学手段提高教学质量是当前我国高等教育改革发展的必然趋势.顺应这一发展要求,在教学过程中充分利用多种计算机相关技术,如收集各种备课资料、计算机辅助课堂教学、实验课进行启发式教育、课后师生邮件问答和学习等多个教学环节,充分调动学生学习的积极性和与老师之间的互动性,提高了信号与系统课程的教学质量,增强了学生分析问题和解决问题的能力.     

略论启发式教学

启发式教学法可以提高学生的学习效率,在课堂教学中适当的运用启发式教学法,不但可以大大地提高学生的学习效率,同时也可以促进生动活泼、积极主动的学风的形成.在教学中创设问题情景是运用启发式教学的关键所在.     

环境土壤学实验课程的启发式教学探索——以土壤酸碱度测定实验为例

针对环境土壤学实验课程的特点及其传统"注入式"教学方法存在的弊端,该文论述启发式教学在环境土壤学实验课程应用的必要性,在此基础上以"土壤酸碱度测定实验"为例提出启发式实验教学模式的构建策略,从教学内容、教学环节及教学方法等方面探索启发式教学的具体应用方法及实施过程,并通过问卷调查分析启发式实践教学的效果及存在的问题,为今后进一步推广启发式教学在环境土壤学实验课程的应用积累经验并提供参考依据。实践表明,启发式教学的应用有利于激发学生的学习兴趣与学习主动性、促进学生对专业知识的理解和掌握,培养学生的独立探究能力。     

艺术设计教育中如何培养学生的自主学习能力

培养学生的自主学习的能力是素质教育的要求,转变观念是培养自主学习能力的关键。树立自主学习能力培养的素质教育观念,实现从以教师的"教"为中心到以学生的"学"为中心的教学观念的转变。在教学中多采用启发式教学、案例分析法、讨论法、成果评价等灵活、开放的组织形式,吸引学生积极主动参与教学过程,培养学生自己发现问题、分析问题、解决问题的意识与能力。     

对语文课堂提问的几点思考

提问是语文教学的一种重要手段,是实施启发式教学,培养学生思维能力的主要方式.在语文教学中,教师应遵循提问的原则和方法,优化提问技巧,提高设问质量以激发学生学习兴趣;发展学生思维和培养学生的探究能力.     

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.     

An Index mechanism for multi-scale view in spatial databases

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.     

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.