共查询到20条相似文献，搜索用时 46 毫秒
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Edmund A. Marek Steven J. Maier Florence McCann 《Journal of Science Teacher Education》2008,19(4):375-389
An 18-item, multiple choice, 2-tiered instrument designed to measure understanding of the learning cycle (ULC) was developed
and field-tested from the learning cycle test (LCT) of Odom and Settlage (Journal of Science Teacher Education, 7, 123–142, 1996). All question sets of the LCT were modified to some degree and 5 new sets were added, resulting in the ULC.
The ULC measures (a) understandings and misunderstandings of the learning cycle, (b) the learning cycle’s association with
Piaget’s (Biology and knowledge theory: An essay on the relations between organic regulations and cognitive processes, 1975) theory of mental functioning, and (c) applications of the learning cycle. The resulting ULC instrument was evaluated
for internal consistency with Cronbach’s alpha, yielding a coefficient of .791. 相似文献
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尹洪涛 《辽宁科技学院学报》2012,14(3):1-3,10
介绍了本钢炼钢工序在超低碳钢生产平台建设方面的经验,通过对产品成分、过程节奏、参数节点控制和产品质量的持续跟踪及改进,本钢超低碳钢在产量大幅提高的同时生产过程及产品质量均得到了较好的保证. 相似文献
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随着钢结构的发展,钢管搭接节点应用越来越广泛.钢结构中节点受力最复杂,目前对平面K型钢管搭接节点的静力研究有很好的基础.但是在低周往复荷载下节点滞回性能的分析还比较少.采用有限元法对平面K型圆钢管搭接节点在弦杆轴向荷载作用下节点的承载力进行研究,对比分析不同几何参数与节点焊接形式下的极限承载力和破坏形式. 相似文献
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采用有限元法,全过程分析了考虑长期荷载作用下时构件的应变-荷载曲线。基于有限元模型,分析了长期荷载作用下圆端形钢管混凝土柱的工作机理。结果表明:考虑长期荷载作用影响对圆端形钢管混凝土柱的内力分布、变形有较大影响,对承载力影响不大,且随着高宽比的增大,构件的峰值荷载增大,延性减小。 相似文献
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情感共鸣是阅读中的心理现象之一。一般的阅读过程中所产生的情感共鸣只涉及两个因素,而在古典文学教学中情感共鸣的产生却涉及到教师、文本、学生等几个因素,其产生过程有三个阶段。文章就古典文学教学中情感共鸣的三个阶段进行了论述。 相似文献
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1Introduction Thispaperfocusesondevelopingalogicalhierarchi calcluster(LHC)foreachblockofmultimediaobjects asthedecentralizedarchitectureofthedistributed multimediaondemand(DMoD)server.Becausethe aggregatedbandwidthrequirementofthegeographical lydistributedusersisincreasingbeyondthecapacityof thenetworkbackbone,theDMoDschemeisproposed todistributetheloadoftheinteractiveMoDserviceto thenodeslocatedatthedifferentgeographical admini strativeregions.ThenetworktopologyG(V,E)and theresourceman… 相似文献
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陈雅春 《湖州师范学院学报》2011,33(3):108-112
贝多芬的钢琴奏鸣曲在和声的运用上,突破了古典时期一些规则的约束,其对和弦的运用就是调内和弦加增六和弦.这个在音乐关键曲式部位经常出现的明亮而带紧张度的和弦对于塑造音乐形象、揭示深刻的音乐思想及其音乐中的矛盾冲突都起到了极为重要的作用. 相似文献
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刘敏 《连云港职业技术学院学报》2004,17(4):79-80
本文以力的作用原理简单阐述了弹奏和弦所需要用的力，力的传递对和弦力度的影响，力和力作用时间对和弦音色的影响。并说明演奏好和弦还需要深刻理解作品的内涵。 相似文献
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姜衡年 《昆明师范高等专科学校学报》1994,(Z1)
在平面解析几何中,经常会遇到求二次曲线的中点弦,求弦的中点,求弦长,给了定弦求关于这弦的共轭直径等问题,这些问题都可借助于韦达定理而简捷地解决。 相似文献
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Behavior of axially loaded tubular X-joints using bolted connection: mechanical model and validation
Yong Chen Ji-yang Wang Yong Guo Guo-hui Shen Li-xian Yang Bin-nan Sun 《浙江大学学报(A卷英文版)》2013,14(12):880-889
X-joints are one of the fundamental joint configurations used in a wide range of transmission tubular structures. Experimental investigation of lbur tubular X-joints with bolted connection was conducted in this study, and it was found that the annular plate was the main yielding control member of such X-joints. Moreover, the portion outside the effective width of the chord member still had a restriction effect on the annular plate, which led to reducing the yielding strength of the joint, while the gusset plate could help to improve the yield strength capacity. In the current design code of steel structures, the contribution to the strength capacity of the gusset plate has not been taken into account. Therefore, based on some mechanical assumptions, a general mechanical model was proposed. After the introduction of the gusset plate strength capacity factor, the yield capacity simplified calculation method of such X-joints was derived. Through the analyses of such X-joints with various diameters and thicknesses, it was concluded that a simple mechanical model could predict test results very well and that the contribution of the gusset plate was also taken into account. 相似文献
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刘戈 《荆州师范学院学报》2008,(6):130-132
桑桐是我国著名的作曲家、和声学专家、音乐教育家,在我国新音乐创作的发展中占有重要的地位。从桑桐早期的《林花谢了春红》、《在那遥远的地方》、《夜景》三首作品来看,虽有较多传统形态的和弦,但也尝试运用半音和三全音构成的和弦以及纯四度与三全音叠加的和弦来取代传统的三度叠置结构和弦,推动了中国新音乐的发展。 相似文献
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段桥生 《湖南第一师范学报》2009,9(4):54-56
对于当今大众教育的地方高师音乐专业学生而言,怎样快速有效地掌握基础和声的写作,是这些初学和声的学生所关注的问题。初学和声过程中关于和弦的书写方法、连接法、跳进的处理、唱名法及副属和弦的构写与识别等问题都值得我们分析与探索。 相似文献
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李岳庚 《湖南第一师范学报》2009,9(2):156-158
变和弦是一种具有特殊音响效果和表现意义的和弦,在钢琴即兴伴奏中,离调变和弦向其临时的主和弦根音作四度或二度上行解决可获得离调效果;运用调内变和弦时必须将所包含的半音解决到调内的稳定音级;歌曲旋律中大、小调的因素相互渗透或是大小调之间相互转调时运用变和弦可实现调式交替;使用变和弦能够起到丰富和声色彩、增加和声表现力的独到作用。 相似文献
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为了精确评估个体心理负荷状态,需要获取目标脑电信号数据,脑电信号是评估脑力负荷变化的重要指标。机器学习和神经网络越来越多地用于脑力负荷分类。利用脑电信号特征可在时域和频域中提取突出信息。因此提出一个结合支持向量机（SVM）与超限学习机（ELM）的混合型脑力负荷分类框架。其中支持向量机作为成员分类器,可在高维EEG特征中查找隐藏信息|超限学习机用于融合成员分类器的输出。将ELM-SVM模型与经典脑力负荷分类器进行比较,得出该模型训练精度准确率为1,且测试精度提升0.1个百分点。 相似文献
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伍卓 《阜阳师范学院学报(社会科学版)》2001,(2):45-47
广告语言是一种商业价值极高的应用语言。广告语中常运用一些修辞技巧、目的是让广告受众产生联想,让广大受众与广告人的思想感情产生共鸣,增强广告的鼓动性和说服性。笔者列举了一些著名的广告语,从修辞的角度分析了其成功之处,并对这些广告进行了翻译。 相似文献
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Seismic behavior of steel reinforced ultra high strength concrete column and reinforced concrete beam connection 总被引：1，自引：1，他引：0
To investigate the seismic behavior of connections composed of steel reinforced ultra high strength concrete （SRUHSC） column and reinforced concrete （RC） beam, six interior strong-column-weak-beam connection specimens were tested subjected to reversal cyclic load. Effects of applied axial load ratio and volumetric stirrup ratio on ductility, energy dissipation capacity, strength degradation and rigidity degradation were discussed. It was found that all connection specimens failed in bending in a ductile manner with a beam plastic hinge. The ductility and energy dissipation capacity increased with the decrease of applied axial load ratio or increase of volumetric stirrup ratio. The displacement ductility coefficient and equivalent damping coefficient lay between those of steel reinforced ordinary concrete connection and those of reinforced concrete connection. The applied axial load ratio and volumetric stirrup ratio had less influence on the strength degradation and more influence on the stiffness degradation. The stiffness degraded sharply with the decrease of volumetric stirrup ratio or increase of applied axial load ratio. The experimental results indicate that SRUHSC column and RC beam connection exhibited better seismic performance and can provide reference for engineering application. 相似文献
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Extensive research has shown that externally bonded carbon fiber reinforced polymer (CFRP) laminates are particularly suitable for improving the fatigue behavior of reinforced concrete (RC) beams. This paper presents the research on flexural rigidity evolvement laws by testing 14 simple-supported RC beams strengthened with carbon fiber laminates (CFL) under cyclic load, and 2 under monotone load as a reference. The cyclic load tests revealed the peak load applied onto the surface of a supported RC beam strengthened with CFL is linear to the logarithm of its fatigue life, and the flexural rigidity evolvement undergoes three distinct phases: a rapid decrease from the start to about 5% of the fatigue life; an even development from 5% to about 99% of the fatigue life; and a succedent rapid decrease to failure. When the ratio of fatigue cycles to the fatigue life is within 0.05 to 0.99, the flexural rigidity varies linearly with the ratio. The peak load does not affect the flexural rigidity evolvement if it is not high enough to make the main reinforcements yield. The dependences of the flexural rigidity of specimens formed in the same group upon their fatigue cycles normalized by fatigue life are almost coincident. This implies the flexural rigidity may be a material parameter independent of the stress level. These relationships of flexural rigidity to fatigue cycles, and fatigue life may be able to provide some hints for fatigue design and fatigue life evaluation of RC member strengthened with CFL; nevertheless the findings still need verifying by more experiments. 相似文献