金属材料专业实验教学内容的改革

实验教学对加强学生的动手实践能力和创新能力的培养具有重要的地位和作用。针对金属材料专业实验教学中存在实验内容单一,学生积极性不高,创新性和综合性实验较少的现状,提出优化实验教学模式结构、建立开放实验室、健全实验课程评价考核体系的实验教学改革的方案,以激发学生的主动性,提高学生的动手实践能力和创新能力。     

基于能力培养的电子实验教学改革研究

实验教学作为高校教学体系的重要组成部分,是培养学生实践能力和综合素质的重要教学环节。基于西北工业大学"省级电子实验教学示范中心"建设的实际情况,以培养学生创新能力为核心,从电子实验教学的现状和存在的问题出发,提出了从基础到创新的"三层次"电子实验教学体系,介绍了实验教学的内容、方法和手段,实践效果显著。     

材料类专业实验中心建设与实验教学改革的探索与实践

针对学校材料类专业实验室及实验教学现状,提出了改变传统的实验室体制和实验教学模式的方案,并付诸实践。按照“以学生为本、培养创新能力”的实验教学理念,建立了独立的专业实验教学体系和与之配套的实验中心管理模式,对于培养学生实践能力和创新能力具有一定的积极意义。     

土力学课程实验教学改革与实践

土力学是土木工程专业一门重要的专业基础课,实验教学部分是培养学生动手能力和创新能力的重要环节。通过对土木工程专业土力学实验教学的现状分析,针对土力学实验教学中授课方式、实验内容设置、考核方式等存在的问题,提出几点建议,以提高实验教学质量、培养创新型人才。     

浅谈物理实验教学中培养学生的创新能力

目前高等教育教学改革的重点之一是培养大学生创新思维、创新意识和创新能力。结合多年的物理实验教学经验,对物理实验教学现状进行了认真的探讨和分析,总结出影响大学生创新能力培养的3个因素。阐述了在物理实验教学中培养学生的创新意识和创新能力的一些途径,希望有利于帮助培养学生创新能力。     

教育技术专业实验教学与学生创新能力的培养

本文从社会对高校创新人才培养的需求切入,分析了教育技术学专业学科特点与通过实验教学培养学生创新能力培养的可能性,对教育技术学专业实验教学的现状做了剖析,提出了通过教育技术学专业实验教学培养学生创新能力的策略与方法。     

给水排水专业实验教学改革初探

在实验教学中培养学生的创新能力是素质教育的重要内容.分析了目前给水排水专业实验教学中存在的不足,提出了实验教学体系和教学模式改革的重要性和新方法,为工科院校学生创新能力的培养提供了思路与途径.     

改革运动解剖学实验教学,提高学生综合创新能力

为提高体育院校学生综合创新能力,剖析运动解剖学实验教学现状,大胆提出运动解剖学实验教学改革思路:"构建网络教学、优化教学手段;整合实验教学内容,开设综合与设计性实验;改革实验教学考核模式、提高学生实验学习积极性等"。在运动解剖学实验教学各环节对学生全方位实施综合素质与创新能力的培养。展现实验室在培养应用型人才中的地位和作用,进而提高学生综合创新能力。     

高校实验教学改革浅议

实验教学是培养创新人才的一个重要实践环节。本文在分析高校实验教学现状的基础上,介绍了实验教学改革的做法,提出了培养创新能力的几点思考。     

药学专业分析化学实验教学改革与实践

分析化学是药学类专业一门重要的专业基础课,是以实验为基础的一门课程。分析化学实验对于培养学生的动手能力、创新能力和分析问题解决问题能力起着重要的作用。文中分析了该校药学类专业分析化学实验教学现状和存在的问题,结合几年分析化学实验教学实践经验,提出了分析化学实验教学改革的建议。     

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