论新形势下电子信息人才的培养

培养能适应电子信息技术快速发展并具有创新能力的电子信息人才是信息产业发展的需要.本文介绍我们在电子信息工程专业建设中,如何开展专业建设、调整教学内容和课程体系,着力培养学生的专业技能、创新精神及提高学生的综合素质等方面的一些思考和具体的做法.     

电子信息工程专业建设思考

我国电子信息工程发现虽然取得了一定的成就,但是仍旧存在创新意识和能力不强,电子信息工程市场未形成良好的市场氛围的发展现状.随着社会对电子信息工程专业人才需求的加大和要求的提升,在这样的发展现状下,高校作为电子信息工程人才培养的阵地采取何种方式来培养和提升学生的专业素养和技能是急需思考和解决的课题.针对这样的课题,进行专业建设是一个比较好的思路,如何进行专业建设则可以从加强师资队伍建设,提升师资水平;建立竞赛机制,培养学生的创新能力和意识;开展教学改革,提高学生实践能力和开展教学改革,提高学生实践能力等三方面着手.     

谈谈我学院的电工电子实习

为提高学生对实习的认识,结合教学实践和当前电子技术发展的新形势,并针对学生实践能力和创新能力的培养,我院电工电子实训中心针对"应用电子和电气控制"各专业统一开设了《电工电子实习》这门课程。本文主要介绍了电工电子实习课程开设的目的、任务、建设目标、教学方法和手段等。通过这几年的实践成效表明,电工电子实习课程的开设有利于培养学生的动手能力以及提高学生的学习兴趣。     

新形势下电子信息工程专业改革建设面临的一些问题与思考

介绍了新形势下电子信息工程专业改革、建设过程中碰到的一些问题,认为应适当控制专业规模以确保培养质量,应根据各校特点办出专业特色,并注重学生的个性化发展以实现多样化人才培养,同时应积极推广、完善学分制.只有这样才能使电子信息工程专业本科教育沿着健康的轨道发展.     

电子与信息工程专业实践教学改革与创新

电子与信息工程专业是一个实践性要求很强的专业,提高学生实践创新能力是培养社会急需人才的必要条件。本文通过构建科学的教学体系,建立新型实验室建设理念———电子专业可移动实验室建设,强化专业实验室和创新实验室的建设,以及合作教学几个方面研究了电子与信息工程专业实践教学的改革与创新。     

电子信息技术虚拟仿真实验教学平台的建设与实践

目前,我国许多高校均开设了电子信息工程专业,该专业涵盖了丰富的知识,涉及到了计算机技术、信息通信和电子科学等诸多内容,属于应用型学科,对于实践性的要求较高,教学目的在于培养学生的实际操作能力,为社会提供高专业素养的人才。我国于2013年启动了虚拟仿真实验教学的建设工作,首次提出将虚拟仿真技术引入高校的实验教学中,虚拟仿真实验教学平台的建设和实践,是培养学生实践能力、创新能力和创造能力的重要途径之一。该文对电子信息技术虚拟仿真实验教学平台的建设和实践进行分析。     

关于改进电子信息工程专业实验教学方法的探索

实验教学对培养电子信息工程专业学生的动手和创新能力起着重要的作用，本文分析了电子信息工程专业实验教学现状，结合个人实验教学经验．阐述了改进实验教学方法的措施，使教学效果明显提高。     

高职开展电子竞赛与教学改革的研究

全国大学生电子设计竞赛对高校教学改革和培养发现优秀人才起到了非常重要的作用,取得了很好的效果。本文借鉴电子竞赛的经验．结合对组织学生参加电子竞赛的培训体会,根据高职学生的职业岗位能力要求,以加强培养学生实践动手能力为重点,对高职电子专业的电子技术课程教学改革进行了粗浅的探讨。     

电路认知实验教学改革与创新精神培养

电路认知实验是电子信息工程专业最基本的专业基础实验课,是电工电子实践教学中最重要的打基础环节,目的是培养学生的电工电子基本素养,学会基本实验技能、实验方法.激发学生的学习热情和实验兴趣,培养学生的创新意识与创新思维,为后续专业实验课程学习和创新人才培养奠定良好的基础.     

加强大学生工程训练,改革电子实验教学

学生实践技能与创新能力培养可分为基础、专业和综合3个层次。文章基于电子科技大学电子实验中心的教学改革与实践,围绕量大面广的基础类电子实验教学,分析当前存在的一些问题;介绍了电子技术实验教学内容与教学方式的改革,以及通过建设开放实验室,加强学生工程训练,促进学生实践能力、工程素质与创新能力的培养。     

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.