加强有机化学教学改革,缩短教学与实际应用差距

探讨有机化学理论和实验教学与现代制药企业对技术人才要求之间的差距,指出目前教材和教学当中存在的与企业要求不相一致之处.提出了有机化学教材和教学改革的一些建设性意见.认为选取现代有机化学知识的内容作为教材,通过现代科学实验提高教师的有机化学知识到现代水平,增加学生实践时间以及扩大学生对有机化学实际应用的眼界,通过网络扩大学生对现代有机化学知识的了解,才有利于培养出企业需求的复合型有机化学专业人才.     

基础有机化学教材改革与探究式教学融合发展研究

基础有机化学教材改革与探究式教学方法相结合是高等院校课程改革的重要阵地之一.采用问题式教材模式编写的《基础有机化学》教材,将探究式教学贯穿于基本概念、基本知识、基本思路和综合应用的教学中来改善有机化学课程教学效果,非常有益于夯实学生有机化学知识的应用能力,同时对学生创新潜质的培养提供了良好的机遇.     

师专有机化学课程建设和教学改革

有机化学是师范专科学校化学专业必修的基础课程。多年来由于师专没有自己教材,一直借用本科教材,本科教材的内容在深广度方面的要求与师专这一层次不同。当前师专急需培养大量的农村初中教师,为此编写出版师专这一层次的有机化学教材,加强对师专有机化学教材适应性和师范性的研究,对提高师专教学质量,培养合格的初中教师具有极为重要的作用。近几年来,我们在深入调查国内师专有机化学教学现状的基础上,研究了国内外各种有机化学教材版本,吸收了一些教学研究的新成果,按照89年国家教委颁布     

国外有机化学教材研究

对国外最近出版的几部有机化学教材进行了研究，指出了有别于我国有机教材的特点，可供高校有机化学教材选择及教学内容改革参考。     

如何适应有机化学双语教学浅析

通过分析有机化学双语教材,针对学生面临的困难,探求学习双语有机化学的方法,以提高学生适应有机化学双语教学的能力。     

高中和师范院校有机化学教学改革研究

本文结合新课标下高中有机化学教学的理念和内容,对高中和高等师范院校有机化学教材及教学内容进行了分析,从教学内容、教学方法及强化实验教学环节等方面,对高等师范院校有机化学教学改革进行了探索性研究。     

对“有机化合物命名”中存在问题的商榷

按照《有机化学命名原则》（１９８０）,对目前高校有机化学教材中化合物命名中存在的问题进行了讨论。     

循序渐进法处理基础有机化学教材的尝试

提出了基础有机化学教材新的编排体系．采用循序渐进的编排法，将有机化学分为３个层次，并讨论了第一层次──基础知识部分的处理方法．     

高职院校有机化学教材的特点和对高职化工类有机教材改革的建议

教材作为学校教育的核心环节,是教师开展教学和组织学生活动的最主要的依据。它制约着教育活动方式,影响着学生身心发展,因此,从课程教材的研究入手,对教材内容及形式的实用性行探讨,才能更好地实现愉快地教与学。该文对目前常用的高职院校有机化学教材进行了研究,归纳了其中值得借鉴的特点,并对高职化工类专业有机化学教材的改革提出了建议。     

浅谈有机化学双语教学

本文就有机化学双语教学的意义、使用的教材、师资力量和教学模式进行了探讨,以期为国内高校从事有机化学双语教学工作和研究的人员提供借鉴和帮助。     

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