提高高等数学教学质量的策略研究

高等数学是高校的一门重要基础课．高等数学教学要注重培养学生解决实际问题的能力,充分调动学生的学习积极性和主动性,努力提高学生的高等数学思维能力．实践表明,这些在高等数学教学中取得了良好的教学效果．     

浅析如何提高学生学习高等数学的兴趣

高等数学对高职高专院校的学生来说,是一门让他们感到很难的课程。本文根据高等数学教学实践和高职高专数学课程的教学现状,分析了高等数学教学存在的问题,探讨在高等数学课程教学中激发学生的学习兴趣的有效方法。     

高等数学教学中激发学生学习动机的探讨

学习动机是由多种心理成分构成的,其中学习自觉性和认识兴趣是两种重要的心理成分。在高等数学教学中,激发学生的学习动机,提高学生学习高等数学的兴趣,进而提高教学质量是高等数学教师面临的一个重要问题。本文通过笔者多年的教学实践,总结了在高等数学教学中培养学生的学习自觉性和认识兴趣的几种方法,从而激发学生的学习动机。     

高等数学教学中的一点尝式

在高等数学的教学中,提高学生学习和思考的积极性和主动性是学好高等数学的一个重要方面。本文对高等数学的教学提出了一点新的尝试：换位学习——让学生站在教师的角度去学习。     

高等数学教学中学生创造性思维能力培养研究

高等数学是一门思维性较强的课程．在高等数学教学中应该加强对学生创造性思维的培养．文章探讨在高等数学教学中,怎样自觉培养学生创造性思维能力,使学生在获得知识的同时,提高分析问题、解决问题的能力．     

浅谈高等数学教学与实际应用的结合

高等数学是所有学科的重要基础,在与学生的交流中发现传统的教学方式并不能使学生感受到高等数学的重要价值。本文从过分注重理论教学的后果和如何实现教学与实际相结合的角度阐述了高等数学的教学应以学生为主体,充分体现"学以致用"的思想。     

关于高等数学教学改革的思考

高等数学课程是高等学校各专业学生必修的一门重要基础理论课程,重点强调培养学生抽象思维、逆向思维能力和提高创新意识。文章从培养学生的创新理念,将多媒体教学引进高等数学课堂,采用计算机辅助教学,在教学中注入情感教育等四个方面进行了分析探讨,总结了自己在教学过程中积累的经验,提出了对高等数学教学改革的一些建议。     

浅谈在高等数学教学中渗透数学建模思想

高等数学是高等学校的一门重要的基础课程,同时也是其它学科的基础。学好高等数学直接影响学生在整个大学期间的学习质量。作者根据自己的教学经验和体会,强调在高等数学教学过程中数学建模思想的重要性,并提出了在高等数学教学过程中加强数学建模思想的途径。     

在高等数学教学中加强素质教育的研究与实践

在高等数学的教学改革中,课堂教学改革无疑是一个重要环节。文章首先对高等数学教学中存在的问题进行了分析,并阐明了在高等数学教学中实施素质教育的必要性;其次从提倡素质教育的角度入手,针对如何培养学生的综合能力、提高教学效率进行了大胆的尝试。     

高等数学教学现状的调查与研究

高等数学对学生后继课程的学习及将来的发展都有着十分重要的作用,如何提高高等数学的教学质量是值得从事高等数学教学的教师不断研究的课题。高等数学的教学一直备受学院及相关院系的关注,遗憾的是高等数学的教学总是不尽如人意,问题何在？为此对我院部分本科专业做了高等数学教学现状的问卷调查,与学生座谈讨论,找到了一些影响高等数学教学质量的关键性因素,结合教学实践,就如何提高高等数学教学质量进行了新的探索,提出了改革的具体措施和实施方案。     

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.