在化学实验中培养学生的能力

从三个方面介绍培养学生的能力, 即围绕“实验目的”组织教学；在教学中创造宽松环境；在时间、内容、考核上给学生一定的自由度；在实验内容方面，增加设计性实验强化学生能力。     

完善《进出口价格核算综合实验》的思考

《进出口价格核算综合实验》是《国际贸易实务》课程中一个重要的内容，它对于增强学生的实践能力，提高学生进出口价格核算的技能具有现实意义。然而，在实验过程中学生反映出了所面临的一些难题，如：感觉比较盲目、没有头绪；有些数据查询困难；实验指导书不够详细；时间紧；计算量大等。本文在分析这些难题的基础上，从加强理论教学与实践教学的联系；完善实验指导书的内容；加强实验前的准备工作；加强对实验过程的指导；重视实验的总结工作；购置相关的软件等方面提出了完善该实验项目的一些思考。     

有机化学实验教学改革与探索

在有机化学实验教学中，精心选择实验教学内容、优化结构，强化基本操作技能；增加绿色化学实验内容，加强环保教育；增加设计型实验，提高学生的综合实验能力；开展微型化的有机化学实验，减少实验污染；利用现代化教学手段，提高实验教学效果。     

创新推进近代物理综合性实验项目建设

结合近代物理实验课程的教学实践,总结了建设综合性实验项目的实验模式,包括综合性实验项目性质的界定、整合优化实验项目和实验内容及建立全程的多元化考核办法等重要方面。实践表明,建设综合性实验项目,能够培养学生的综合分析能力、实验动手能力、数据处理以及查阅资料的能力。     

无机化学实验中自主设计实验的教学研究

本文旨在探讨在大一无机化学实验课中开展自主设计实验的教学方法。以基础实验为基石,根据学生实验的内容和时间作出合理的安排,分阶段分层次开展学生自主设计实验,让学生可以自主决定实验内容或在教师指导下选择实验内容进行研究与探索,创设学生自己动脑、动嘴、动手的教学环境,激发学生探索的欲望和独立思考的积极性。教学实践表明在大学一年级的无机化学实验教学中开展适量的学生自主设计实验有利于学生的动手能力、独立思考能力以及科学研究方法的培养。     

医用物理学实验教学改革的一些设想

;医用物理学的实验课程,可以促进学生对物理原理在医学上应用的理解,提高学生的动手能力和解决问题的能力,但目前的物理实验课程,存在医学特色不突出、学生对实验共趣不浓厚、教学设计未能激发学生学习兴趣等一系列问题,应该从实验内容、教学方法、指导思想、教学手段等几方面着手,进行改革.     

有机化学实验教学改革和学生创新能力培养初探

有机化学实验课是高等教育培养化学相关专业学生科学精神和创新实践能力的重要课程之一。为了更好地培养学生创新能力和提高学生实验能力,对实验技能培训、实验内容选择、科研资源利用、教学方法和教学评价等相关方面的改革进行了初步的探讨,并在实践中获得了较好的教学效果。     

在中学化学教学中培养学生观察能力和实验能力的途径和方法

教育的主要目的是培养有创新意识，创新精神和创新能力的人，化学教学作为教育的一个方面应十分重视培养和发展学生的能力，本文钭对在中学化学教学中培养学生的观察能力和实验能力的途径和方法进行论述，培养学生的观察能力，应当注意做到：明确观察目的，制订周密的观察计划；培养严肃的观察态度；引导学生反把观察与结合起来，培养学生的实验能力，应当做到：积极创造条件，让学生参与实验，必须强调教师科学，规范的示范性；必须强调指导模仿练习，培养独立操作能力，强调单项与综合练习并举，集中与分散练习结合，利用迁移，促进实验技能的形成；尽量做到由学生设计实验方案，完成实验习题和作业；必须探索性实验与创造性思维的结合。     

信号与系统实验教学探索

本文从实验教学和理论教学的关系、实验方法、实验内容等三个方面探讨了信号与系统实验课的改革,以帮助学生加深对理论的理解和掌握,培养学生动手能力和创新精神。     

在化学实验教学中培养学生的能动性

化学实验在培养学生能动性方面有其独特的效用,就化学实验在教学方法、教学手段及内容方面做相应的改革,使之更适合于培养学生的能动性,以培养具有“基础扎实、知识面广、能力强、素质高”的优秀化学人才。     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.