学前教育专业女生数学能力的培养

学前教育专业女生数学能力直接关系到学前教育中数学教学的质量,关系到学前儿童数学思维、数学能力、数学兴趣的培养。有证据证明随着数学内容的不断加深,学前教育专业女生的数学能力逐渐下降。根据多年数学教学实践活动经验,理论联系实际,对学前教育专业女生数学能力培养提出了一套方法,并在实际应用中收到了良好的效果。     

应用数学在工程实践中教学模式探讨

为了提高太原理工大学数学学院应用数学专业学生的独立分析和解决问题的实践应用能力,文章探讨了太原理工大学应用数学专业在工程实际问题中的实践教学模式,构建了应用数学专业在工科研究及工程实际中实践教学模式的整体培养方案,结合实践教学培养了一批应用型创新人才,提高了学生的理论应用能力,促进了应用数学专业的发展。     

《计算机算法设计与分析》教学方法研究

<正>0概述随着计算机与信息技术在各行各业的普遍应用,产生出开发各种应用软件的需求。以最低的成本和最快的速度开发出符合各种需求的软件是软件设计与开发的目标。设计一个高效的软件不仅需要编程技巧,更需要合理的数据结构和高效的算法,而这正是计算机科学与技术领域里数据结构和算法设计所涉及的主要内容。因此,计算机算法设计与分析和本课程是高校计算机专业高年级本科生和研究生的一门重要专业学位课程,同时也是一门与计算机有关的非计算机专业如管理信息、系统工程、应用数学与计算数学的专业课[1-2]。它的主要目标是通过对计算机算法系统的学习与研究,理解和掌握算法设计的主要方法,培养学生对算法的计算复杂性进行正确分析的能力,为独立设计算法和对给定算法进行复杂性分析奠定坚实的理论基础。     

关于落实数学与应用数学专业人才培养目标的思考

通过分析专业人才培养目标及社会对数学人才的需求形势,研究数学与应用数学专业应怎样夯实学生基础理论、加强实践能力、培养创新精神。     

高职数学教学改革的思考与探索——以“算法教学”的引入为切入点

针对高职院校数学教学现状，结合本校的专业要求和学生的认知能力，尝试对大一数学课程进行算法教学的实践探索。结果显示，适合的算法教学模式可弱化数学中繁杂的计算和证明；可提高数学课堂教学效率；有利于培养学生的创造性思维与解决问题的能力；有助于学生学习其它相关专业课程，并促进专业课的理解；可以激发和促进学生对数学的学习热情。     

信息与计算科学专业开放性实践教学改革初探

结合我校信息与计算科学专业的经济管理特色,即在教学实践中初步形成以数学理论为基础,以经济管理类各专业为依托,以数学软件为工具的教学模式,分析了实践环节教学中存在的各种问题;并介绍了该专业实验教学体系、实验课程教学和实践教学内容方面的改革思路及已经初步取得的实践教学改革的成绩;最后探讨了实践教学改革在加强学生实际操作能力的锻炼和培养适应社会需要的高素质人才方面的意义。     

“数据结构与算法”模块化教学改革研究——以合肥学院计算机科学与技术专业为例

模块化教学以素质为核心、以能力为本位,是应用型人才最有效的培养模式之一。"数据结构与算法"是计算机科学与技术专业最重要的专业基础模块之一。通过探讨"数据结构与算法"模块的模块溯源、模块在专业培养中作用、模块能力分解、模块化实施方案等方面,并从理论教学内容重组、实践教学内容重组和自主学习三个方面深入研究了"数据结构与算法"的模块化实施方案,最后分析了本专业"数据结构与算法"的模块化实施效果和后续改进措施。     

对高等数学研究性教学的探讨与思考

研究性教学以实现解决问题为目标,以培养学生的思维能力、创造能力为重点,使学生在教师创设的问题情景中进行探索式的学习,进而达到促使学生发展的根本目的．“研究性”体现了”做数学”的过程,意味着发现与创造,有利于培养学生创新精神与实践能力．高等数学研究性教学通过挖掘教材联系,寻求数学的本原认识;提炼数学思想方法,体现高水平数学教学;以问题驱动为核心,设计揭示数学实质的教学;通过教“问题解决”,训练学生研究性学习方式,从而教师也提升专业发展能力．     

测控专业单片机课程教学改革

针对＂单片机原理及接口技术＂课程在机电学院测控技术与仪器专业的中的重要地位,进行了单片机理论和实践教学改革。在教学过程中紧紧围绕测控系统原理和设计,使理论知识和工程应用相结合,注重学生实际动手能力、分析和解决问题的能力、创新能力和团队合作意识的培养。     

浅谈中职《电子线路》入门引导教学设计

本文通过设计电子线路入门教学引导,使中职电子技术专业学生尽快适应电子专业基础的入门学习过渡,养成良好的学习习惯,培养学生实验能力,较好完成理论与实践相结合。     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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