元认知训练对提高中学生证明平面几何题能力的实验研究

本研究采用对比试验的方法,运用自编的思维训练材料及元认知监控提问单对初三学生进行有关证明平面几何题的思维策略训练及其元认知训练.结果表明:1)不同层次学生(优、中、差生)的思维策略训练效果显著;2)元认知训练能够更有效地提高证明平面几何题思维训练的效果.     

关于分数(百分数)应用题中的单位"1"和对应分率的分析和判断

分数(百分数)应用题,在小学六年级第十册课本中占有相当大的比例,在整个小学数学教学中也是举足轻重的.由于分数应用题的数量关系比较抽象,较难理解.因此,在教学中,一要教学生找出题中有数量关系的句子进行分析,加强基本训练分散难点;二是要借助线段示意图帮助学生分析数量关系,提高学生分析和解题能力;三是重视用方程解答案较复杂的分数(百分数)应用题,化难为易,培养学生思维的灵活性.     

试谈学生解应用题能力培养

小学数学中的应用题是数学教学的重点内容之一,也是教学中的难点,解答应用题则是一项复杂的思维活动,必须具备多方面的能力。我结合平时的教学实践,在知识教学的同时,更加强了思维训练的力度,强化思维能力的培养。整数应用题按照运算步骤可分为两类,即简单应用题和复合应用题,究其解题的关键,简单应用题是判定”算法“——运算方法,复合应用题则是确定”算序“——运算顺序和算法两个问题,这些思维能力的培养,只有让儿童理解、掌握思考和操作程序,才能在提高解题能力的同时提高他们的思维能力,从解题过程看,教学中应注意培养学生以下几方面的能力：     

内隐学习和外显学习在篮球战术教学中的研究

采用实验法、数理统计法、实验后学生访谈法等方法,对学生防守战术的获得进行了不同复杂情境的内隐学习与外显学习效应的比较,探讨篮球防守战术获得的最佳途径.结果表明,内隐学习和外显学习都有利于对学生篮球防守战术的获得,但内隐学习比外显学习更有利于学生灵活掌握战术,大大提高了学生的战术执行率,从而使篮球战术教学更加有效、顺利的实施.     

元认知视角下的大学英语阅读教学

在英语教学中,阅读能力是一项基本的语言技能。元认知策略对英语阅读教学提供了新的理论视角．在课堂教学中教师要积极地训练学生的阅读策略,有意识地培养学生的元认知能力;同时以元认知策略为指导,督促学生进行课外自主阅读,进一步提高学生的阅读理解能力,从而使学生成为具有策略性思维的阅读者和自主学习能力的学习者。     

元认知策略培训与大学英语写作的关系

通过对大学英语写作课堂融入元认知主体评估和元认知策略以及元认知任务评估的培训,以探讨元认知与大学英语写作能力发展的关系。结果表明,元认知不仅有利于中国学生摆脱母语思维的负迁移,提高学生的语言运用能力,而且能有效培养学生的自主学习能力。     

关于中国二语课堂阅读元认知策略可教性的实验研究

以Sternburg关于认知结构的成分理论 ,Anderson认知策略习得的三阶段理论为理论框架 ,结合调查来改进Pearson和Dole提出的学习策略五步训练法 ,从而形成元认知知识讲授与运用相结合的阅读元认知策略训练模式。对 14 0名中国非英语专业学生进行的策略训练的实验结果证明 :( 1)阅读元认知策略训练能够提高被试的元认知策略意识 ;( 2 )阅读元认知策略训练必须理论联系实践     

元认知策略应用于高职高专英语听力教学的实证研究

本研究以一所职业技术学院两个自然班的73名学生为调查对象,分析元认知策略使用与英语听力之间的关系。研究结果显示:(1)元认知策略的培训能有效提高高职高专学生的听力理解水平;(2)大多数学生的元认知意识在培训后都有显著提高;(3)听力能力强的学生使用元认知策略的频率高于听力能力弱的学生;(4)在听力理解能力的提高程度上,能力弱的学生提高的程度高于能力强的学生,这说明元认知策略的培训对听力能力弱的学生更具有潜力。     

关于分数（百分数）应用题中的单位“1”和对应分率的分析和判断

分数（百分数）应用题，在小学六年级第十册课本中占有相当大的比例，在整个小学数学教学中也是举足轻重的。由于分数应用题的数量关系比较抽象，较难理解。因此，在教学中，一要教学生找出题中有数量关系的句子进行分析，加强基本训练分散难点；二是要借助线段示意图帮助学生分析数量关系，提高学生分析和解题能力；三是重视用方程解答案较复杂的分数（百分数）应用题，化难为易，培养学生思维的灵活性。[第一段]     

论元认知策略培训与英语自主学习能力的培养

外语教学中进行元认知策略训练是提高学习者元认知能力、实现自主学习的重要途径,也是外语教师面临的一项重要任务。本文以元认知理论为依据,结合教学实践反思,对元认知策略训练在外语教学中的作用进行探讨,并对外语教师如何通过实施元认知策略训练来提高学生的自主学习能力提出建议。     

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.     

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.     

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.     

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.     

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.     

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.