我国物理习题教学思想的回顾与反思

探索我国物理习题教学思想的演变过程应该从物理习题教学的地位与作用、物理习题教学的心理学分析、物理习题解决方法三个方面入手.进一步,须探讨习题教学作用的心理学基础,明确习题教学的优点和固有局限性,防止习题教学可能出现的偏差.物理习题教学思想的反思包括以科学哲学视角分析习题教学在物理教育中地位,以整体性视角探索习题教学在物理教学系统中与物理教学主体的相互作用和相互关系,以及习题教学的生态化研究取向.     

在物理创新教学中要突出物理思想和方法的教学

物理思想是辩证唯物主义的思想 ,物理方法是学生发展创新能力的桥梁 ,二者是物理创新教学的本质。突出物理思想和物理方法的教学是物理学科创新教学的根本所在     

对物理专业汉语课教学的一点探究

掌握好物理概念是物理教学的关键,教师应当在抓好物理概念教学的基础上,搞好物理基本规律的教学,进而进行物理练习的教学、深化拓展物理知识,促进由知识向能力的转化。本文从物理概念、规律、练习三个方面,谈了如何搞好物理专业汉语的教学。     

中学物理教学中良好学习情景的创设——物理情景创设

在物理教学中,良好的教学情景应包含师生融洽的思想感情、语言情景和学习、认识物理知识的物理情景。搞好物理教学,教学情景的创设是非常重要的。本文阐述了物理教学中课堂内外物理情景创设的具体问题。     

新课程背景下的物理概念教学设计探讨

物理概念教学作为物理教学中的重要组成部分,它贯穿于整个物理学,学生能否正确地全方位地理解物理概念,将直接影响整个物理学或某部分物理知识的学习和掌握。随着我国新课程改革的不断深入,如何在物理概念教学设计中贯穿新课程的理念和教育思想已成为广大一线教师所关注的问题。本文拟从新课程的理念和物理概念教学自身的特点出发,通过物理教学大纲(试用修订版)和物理课程标准中对物理概念教学的对比,分析物理概念教学设计的区别,就物理概念教学设计谈谈自己的看法。     

浅谈中专物理的有效性教学

明确目标是物理有效性教学的前提和依据;增强学生的自信心是物理有效性教学的首要任务;调动学生的积极性是物理有效性教学的关键;实验教学是物理有效性教学的重要环节;营造浓郁的企业氛围是物理有效性教学的桥梁。     

浅谈原始物理问题的教学实践

针对传统物理习题教学的不足，提出原始物理问题可作为习题教学的有效补充，并介绍了在物理教学中引入原始物理问题的教学实例。     

高等职业技术学校里的物理学习的兴趣培养和能力培养

物理教学的核心是注重培养学生的能力,教会学生研究物理问题的方法,训练学生的物理技能。高等职业物理教学是整个物理教学过程中的终点,教师在教学中要根据学生特点,激发学生继续学习物理的浓厚兴趣和综合能力的培养。     

信息技术与初中物理整合下教学模式的研究

信息技术与初中物理新课程的整合,是指将信息技术融入到初中物理新课程的有机整体中,成为初中物理课程的组成部分,从而使物理教师与学生双主体、教材客体、教学设备媒体等各个教学要素和教学环节,经过有机组合,相互融合,达到初中物理教学整体优化,以高效达成教学目标。在信息科技飞速发展的今天,信息技术与物理课堂教学整合的新型教学模式也将越来越引起教育者的关注。本文旨在研究在初中物理教学实践中探寻信息技术与物理教学整合的教学模式。     

试论物理教学中的美育

本文认为物理教学中的美育主要应包括寓物理关于物理教学之中、寓物理美的创造于物理教学之中和寓美育于物理教学过程之中三方面,并分别作了具体论述。     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the