化工原理实验竞赛的实践与思考

分析了江苏师范大学化学与材料科学学院目前化工原理实验教学中存在的问题,并以参加化工原理实验竞赛为契机,对化工原理实验教学进行改革;论述了化工原理实验竞赛对培养学生创新意识和实践能力的重要性;探讨了化工原理实验竞赛对化工原理教学的促进作用.     

新时期化工原理实验教学改革和实践

本文根据化工原理实验教学的特点,从仿真实验的引入,综合实验的设置入手,总结了化工原理实验教学改革与实践经验。提出了分层次的实验教学模式和小论文的实验报告撰写形式,教改的重点是培养学生的工程思维能力,动手能力和创新能力,应用所学的化工知识分析和解决问题的能力。指出网上预约的开放式教学模式为化工原理实验教学的发展方向。     

化工原理实验教学的不足与改进

化工原理实验教学是化工原理课程的一个重要组成部分,是学生将化工原理理论与实践联系起来的必不可少的重要环节。本文对现行的传统化工原理实验教学方法中存在的一些问题进行了思考和探索,并从改进教学模式、提高实验课教学效果以及考核方式等方面提出了几点改进措施。     

开放式化工原理实验教学模式研究

为培养学生实践动手能力和创新能力,提高实验教学效果,针对传统化工原理实验教学模式存在的问题,分析了采用开放式实验教学模式的必要性。对开放式化工原理实验教学模式进行了有益探索,在化工原理实验教学方法、教学手段、教学内容、考核方式及引导学生积极参与开放实验等方面的实践经验进行了总结,并对开放式教学模式尚需完善之处提出了改进措施。     

化工原理实验仿真系统的开发

选择功能强大的Delphi开发了基于Windows操作系统的新型化工原理实验仿真软件.采用图像控件与图形函数相结合的方法方便地绘制出化工原理实验流程图,在实验仿真动画的开发过程中,使用了像素动画、异或动画、帧动画等动画技术,并较好地解决了窗体重绘问题.教学实践表明:该系统能够满足辅助化工原理实验教学的要求,具有推广应用价值.     

化工原理仿真实验在实验教学中的应用

目的:探讨化工原理实验的新方法。方法:通过多年教学实践,阐述化工原理仿真实验的特点、应用及存在的问题。结果:仿真实验可应用于化工原理实验教学。结论:仿真实验是一种有效的辅助教学手段。     

构建多层次、分层次化工原理实验教学体系初探

以广西民族大学化工原理实验教学改革为例,分析建立适应多层次和分层次化工原理实验教学平台和与之相适应的课程体系所需要解决的问题.从而提高教学质量,培养创新型人才,创建更完善的实验教学体系.     

化工原理实验改革方案初探

本文针对化工原理实验教学现状,分析了其中存在的问题,提出了改革实验教学的有效途径和方法,探讨了该课程改革在学生素质与能力培养中所起的作用。     

化工原理实验教学与考核改革探讨

本文对化工原理实验教学内容、教学方法和考核方法进行了探讨,笔者结合教学实践,对三层次的实验教学体系和开放式实验的设置、引导式实验教学模式、实验考核的综合评分制度以及取得的效果进行了说明。     

工科化工原理实验教学改革的探索

在化工原理实验教学中,就课程内容的选择,实验理论课的讲解,电化教学手段的采用,实验成绩的考核办法,实验指导方式的改革等方面作了一些探索性工作.     

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.