翻转课堂在计算机绘图系列课程教学改革中的应用

翻转课堂通过对知识传授和知识内化的颠倒安排,改变了传统教学课堂上以教师为主导讲授而学生处于被动接受知识的现状,实现了对传统教学模式的革新。本文将翻转课堂教学模式引入计算机绘图系列课程教学,通过录制教学视频、构建网络教学平台,实现了学生课前自主学习完成知识传授,而知识内化则是在课堂上经老师的指导与同学的协助而完成的。翻转课堂教学模式对于提高学生自主学习能力,提高课堂教学效率具有积极的作用。     

翻转课堂在《机械制图及CAD》课程教学改革中的应用

翻转课堂起源于美国,通过对知识传授和知识内化的颠倒安排,改变了传统教学课堂上以教师为主导讲授知识而学生被动接受知识的现状,实现了对传统教学模式的革新。将翻转课堂教学模式引入《机械制图及CAD》课程教学,通过构建网络教学平台,实现了学生课前自主学习完成知识传授,而知识内化则是在课堂上经老师的指导与同学的协助下完成的。指出翻转课堂教学模式对于提高学生自主学习能力,提高课堂教学效率具有积极的作用,值得推广。     

基于翻转课堂模式的模拟电路课程设计教学改革与实践

在模拟电子线路课程设计的教学中,进行了基于翻转课堂模式的教学改革与实践。通过翻转课堂重新建构学习流程,将"信息传递"提到课前,"吸收内化"提到课上。通过课堂互动,将学生从知识的被动接受者变为主动学习者,实现高效率的深度学习。将各种先进的教学手段融入教学过程,提高了学生的学习兴趣、激发了学生的设计创新能力。通过翻转课堂教学体系,更新教育观念与教学方法,培养综合素质好的开拓创新型高级技术人才。     

公安情报技术翻转课堂教学设计研究

翻转课堂指的是让学生在课前预先观看教师所录制的线上课程,再到课堂进行深度讨论与作业等活动的互动式教学模式。通过实验方式,探讨公安情报技术课程使用翻转课堂学生的学习成效、动机、态度及兴趣,将部分讲授的内容录制视频后上传至校教学平台,让学生课前先观看视频,课堂上以异质化分组讨论、小组报告活动等方式进行。研究发现翻转课堂的学生中,学习兴趣与动机有改善,学生的态度及兴趣也因为翻转课堂而趋于正向,最后在讨论翻转课堂优缺点的基础上,认为需要设计一个更适用翻转课堂互动的平台以利于学生沟通与知识交流。     

翻转课堂教学实践探索研究

伴随日益更新的教学理念和网络技术,信息技术与课程整合在教学实践中日渐深入.当前翻转课堂为"主体—主导"的教学实践提供了新的路向.在梳理翻转课堂起源与内涵基础上对翻转课堂进行教学设计与实践,通过对课前预习效果与课上学习过程的分析,得出翻转课堂对学生自主学习能力以及解决问题能力提高有一定教学实践意义,指出翻转课堂对教师课堂设计与引领经验以及学生课前自控与自主学习能力是一种挑战,需要进一步加强与提高.     

以原电池教学为例的翻转课堂教学案例分析

翻转课堂又为"Flipped Classroom"或"Inverted Classroom",也可译为"颠倒课堂",是将学习以教师为中心向以学生为中心转移,并对课堂内外的学习时间进行重新调整的一种教学模式。该研究以《化学(选修4)》第四章第一节"原电池"的教学为案例,介绍基于微课的翻转课堂教学的实施,探讨在化学课程的教学设计中如何合理利用微课实现课堂的翻转,进而提高教学效果。     

高职高专课堂教学过程的有效性研究

为了克服高职英语口语课程传统模式的弊病,提高教学质量,本文提出了将网络教学系统与翻转课堂教学进行深度融合,新的教学模式以网络资源为载体,学生自主学习为主体,通过课前、课中、课后三个环节完成翻转课堂的教学流程。     

浅谈翻转课堂教学模式在《Dreamweaver网页设计与制作》课程中的应用

随着各种网络新技术的不断涌现,网络应用软件为翻转课堂教学模式提供了很大的发展空间,同时为当下课堂教学改革掀起了一番浪潮。该文以《Dreamweaver网页设计与制作》课程为例,详细阐述了翻转课堂改革的设计及实施过程。其中,翻转课堂教学实施以"CSS样式表"知识点为例,将教学过程划分为课前学习、课堂活动、课后辅导三个阶段,利用翻转课堂教学顺序颠倒的特点,将知识传授放于课前进行,知识建构通过课堂活动实现。在每个阶段针对高职学生的学习特点采用灵活多样的教学方法,结合个人及小组协作等教学形式来促进学生知识建构及能力培养,取得了较好的效果。     

基于微课的翻转课堂在高校体育教学中实施可行性分析

微课和翻转课堂有效地将互联网、信息技术运用到教育中,对国内外的教育都产生了一定的影响。文章对目前高校体育教学的局限性和基于微课的翻转课堂在体育教学中应用的优势进行分析,通过问卷调查法、访谈法、文献资料法,从学生、教师、教学资源与环境对基于微课的体育翻转课堂实施的可行性进行剖析。分析结果表明,能够在体育教学中有效的实施翻转课堂,需要增强学生自主学习意识;体育教师需要创新教学理念,强化信息技术与体育课程整合意识;营造自主-互助的学习环境;对体育视频资源要进行及时的补充。     

基于慕课的程序设计类课程翻转课堂教学模式探索与实践

针对地方高校教学中普遍存在"知识讲授主导课堂"的现象,探索信息化环境下翻转课堂教学模式,提高课堂知识内化效率、提升学生学习能力.以学习平台资源建设、翻转课堂教学设计、学习分析和评价为主要内容,提出基于慕课的翻转课堂教学模式,并探讨该模式在程序设计类课程教学中的应用.对实践过程中的教学资源建设、翻转课堂运用和评价体系进行研究,为程序设计类课程翻转课堂教学模式改革提供新思路.     

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…     

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.     

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.