浅析计算方法教学中存在的若干问题

本文简单介绍了计算方法课程在各行各业中的重要性,重点提出了计算方法课程在教与学过程中存在的问题,分为课堂教学与上机试验中存在的问题.     

对电机学中几类近似解问题的探讨

针对使用较为广泛的电机学教材,探讨了电机学课程教学中的几种常见近似计算问题.讨论了在计算技术、软件发展的情况下,准确计算和近似计算的取舍,及对电机学课程教学中关于近似计算问题教学的一些思考.     

应用型本科院校“计算方法”课程改革的几点体会与思考

“计算方法”是一门研究用计算机求解各种数学问题的数值方法及其理论与软件实现的数学课程.针对“计算方法”课程教学中存在的一些问题,从教学内容的优化、教学方法的改革、考核形式的转变三方面对该课程教学改革进行了初步的研究与思考.     

“微机原理与接口技术”课程中学生计算思维培养模式探索

目前计算思维和计算思维能力的培养越来越受到重视.大学计算机基础课程教学担负着向非计算机专业的学生普及计算机知识和技术、培养计算思维能力的重任.“微机原理与接口技术”公共课是面向工科学生计算机基础教学的核心课程,在其理论教学与实验教学中强化计算思维的培养有很多有利因素,课程的教学模式对培养学生基于计算思维方式的问题求解、系统设计能力有重要影响.     

材料科学专业引入计算模拟方法教学的研究

从材料科学研究的特点和面临的问题为出发点,指出计算模拟已和实验、理论成为材料研究的3大支柱,掌握计算模拟方法成为现代材料科学研究的必备手段之一.进一步介绍了材料计算模拟的主要方法和开展计算模拟的教学实践过程.通过开设计算材料类课程、在材料相关的理论课程中加入计算模拟方法介绍以及举办计算模拟相关的学术讲座等教学方式,教授和指导学生学习材料计算模拟方法.经过几年的教学实践发现,学生对计算模拟表现出极大的兴趣,并取得较好的教学效果.     

应用型本科计算方法课程教学改革探讨

针对应用型本科计算方法课程教学中的一些问题,根据课程特点与任务,从教学内容与教材选择、教学方式与手段、实验教学、考核方式等方面提出了教学改革.     

程序设计课程教学中的计算思维能力培养

对传统计算机基础教学中的计算思维训练中出现的问题进行了梳理,提出了强化程序设计课程教学中计算思维训练的几点做法,这有利于实际进行计算思维能力训练,提高计算机基础教学水平.     

基于PSASP的电力系统潮流分析

电力系统分析课程是电气工程及其自动化专业的一门重要专业课,课程内容囊括了电力系统的基本概念、基本理论以及计算方法等.在实践中,由于本课程教学及实验学时较短,多数学生感到难度较大.为提高本课程的教学效果,提高学生的应用能力,将理论与实际相结合,在电力系统分析课程实验中引入电力系统综合程序具有重要意义.针对电力系统分析基础课程实验定位,该文采用电力系统分析综合程序(PSASP)结合四节点系统实例进行潮流计算,阐述了电力系统建模过程中需要注意的几个问题,实现潮流结果的文本输出和图形输出交互化.     

基于计算思维的计算机基础课程教学研究

大学生计算机基础课程不仅要注重操作技术的训练,更要注重思维素养的培养,使学生不仅是软件的熟练操作者,也要成为实际问题的解决者.在计算机基础课程的教学中,高校教师把计算思维的思想渗透到计算机基础课程教学过程的各个环节中去,在课堂教学环节和实践学习环节都要注重学生的计算思维培养.在教学环节突出教师的主导角色,引导学生运用计算思维去思考、去解决学习这门课程时遇到的难题;在实践环节,加强学生的思维训练,将计算思维的方式贯穿于实验过程之中.计算思维和计算机基础课程的结合可以使学科知识与计算思维能力互相促进,达到提升学生创新实践能力的目的.     

面向专业方向的专业课程设置探讨

针对目前课程设置中普遍存在的思路不清、目标不明等问题,提出一种面向专业方向的课程设置设想,旨在建立一种面向地方、方向明确、集中体现地方院校特色的课程体系设置思想.本文最后具体给出了数理系信息与计算科学专业的课程设置设想.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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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