学生参与无机化学实验准备的探索

试行了在无机化学实验课前和课后指导学生参与化学实验准备,探讨了指导学生参与化学实验准备的方法和意义,教学研究和尝试表明,学生参与化学实验准备有助于促进师生沟通与交流,激发学生的实验兴趣,提高学生实验的主动性和提高实验预习效果。     

重视化学实验教学,提高教学质量

化学是一门以实验为基础的学科,具有很强的实验性。化学实验是学生学习化学的基础。通过加强化学实验教学,培养了学生的实验操作技能,激发了学生学习的积极性,从而提高学生综合素质,提高了教学质量。     

工科院校有机化学基础实验调查与改革

调查了大一学生在高中阶段的实验情况,分析了大一学生化学实验课的现状,对工科院校学生基础实验课的教学改革进行了探讨,有机地将有机化学基础实验与专业实验、基础实验技能与综合性实验及创新实验联系起来,使学生学会从多角度、多种方法分析解决问题;学会知识的运作和严谨求实的科学态度,使学生的创新能力得到提高。     

内燃机实验教学的思考与探索

基础性实验、开放性实验可针对不同层次的学生开设。通过对内燃机实验教学内容和实验模块的分析,指出了内燃机实验能加深学生对专业课的理解,达到提高学生综合素质的目的。通过速度特性实验和活塞漏气量实验,阐述了学生参与实验的步骤,进一步加深学生对内燃机结构、原理的理解,使学生毕业后对融入相关技术工作起到促进作用,达到培养创新性人才的目标。     

初中化学实验教学与学生创新能力的培养

在新课标的化学教材中,增加了许多化学实验尤其是探究性实验。化学实验成为落实新课程改革目标的重要手段之一。本文分析了化学实验教学中如何培养学生的创新能力,即变演示实验为探索性实验,采用多种实验方法,活跃学生思维;创设实验问题,通过实验探究促进学生创新能力的发展;引导学生保持积极态度,主动探索研究;培养学生兴趣,激发学习、创新热情。     

运动饮料配制综合性设计性实验教学探索

为培养运动人体科学专业学生的专业实践操作技能及发展学生的综合能力,开设有较强实用价值的运动饮料配制实验作为学生综合性设计性实验,采用了小组间进行竞赛的组织方式开展活动,激发了学生学习动机,增强了实验趣味性,培养了学生的创新性与团队协作能力,取得了良好的实验效果。     

金属材料工程专业综合实验教学改革的初探

论述了开设专业综合实验的目的,重点介绍了专业综合实验的内容和实施方法。初步的教学实践表明:开设专业综合实验,提高了学生学习的积极性和主动性,有利于全面训练学生的实验技能,培养学生的综合素质以及提高学生的创新能力。     

在有机化学实验课程中开设“设计性实验”的尝试

为培养学生综合实验能力,在“有机化学实验”课程中开设了“设计性实验”,尝试让低年级学生结合实验课程教学,共同查阅文献、设计实验方案、最终完成实验并给出合格的实验报告,引起了学生们的较大兴趣。     

植物生理学及生物化学实验课考试改革初探

从1998年开始,我校植物生理学教学在实验教学及考试方法上进行了改革,开设综合性实验科目,将做实验与考实验相接合,大大调动了学生的学习主动性和积极性,学生综合运用植物生理实验方法的能力明显提高,学生的实验技能和实验素质的培养落到了实处。     

基于BB平台的电子技术实验教学改革的研究

针对非电类专业电子技术实验的特点,利用Blackboard网络平台对非电类学生电子技术实验的内容及实验模式进行改革。对不同的实验内容设计了特定的实验报告模板,并以计数器实验为改革案例,让学生以自己的实验台号个数位作为进制数进行电路设计。实践证明,通过实验内容及模式的改革,激发了学生的学习主动性,提高了学生创新意识,取得了良好的实验教学效果。     

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)

正~~     

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