试论语文教学与语文研究性学习的契合     

缪红娟 《淮南职业技术学院学报》2008,8(4):58-60

语文教学与语文学习的过程不仅是知识传授与发展智能的过程,更是培养学生创新精神和创造能力的过程,为此,在语文教学中引进了研究性学习方式,目的是改变“接受性学习”为主的传统的课堂教学,力求在语文教学与语文研究性学习之间找到一个好的契合点,使学生从语文知识的学习、能力的培养与研究性学习的实践之间能相互转换,从而在智力与情感、知识与兴趣、成绩与态度、能力与协作中发现人才,培养人才。  相似文献   

饱和烷烃衍生物的分子隧道结制备及其电学性能研究   总被引：1，自引：1，他引：0  

刘向芬  袁寿财  李勋  范小林 《赣南师范学院学报》2008,29(6):1-4

采用毛细管隧道结法,用C12H25OH和C122H25NH2作功能分子,采用分子自组装方法,在无水无氧条件下制备“镓-自组装单分子层-镓”分子隧道结,并对其电学性能进行了检测．结果表明：在无水无氧条件下制备的分子隧道结的I～V曲线同样呈现出明显的非线性关系,其电子迁移较之在大气条件下更容易发生．  相似文献   

Josephson结中的螺旋林孤子     

海文华  肖奕 《衡阳师范学院学报》1995,(6)

超导薄膜表面存在螺旋林结构的事实说明，在由两块超导薄膜弱连接构成的Josephson结中，Josephson电流可能沿螺旋林传导。假定初始时刻Josephson方程的解满足这个要求，可以得到螺旋林孤子解。这些孤子局部为空间螺旋线，整体为螺旋林，并沿螺旋轴向运动；从而较好地描述了沿螺旋林传导的Josephson电流。  相似文献   

浅析数学方法在政治课教学中的必要性及其作用     

余世安 《培训与研究》2003,20(2):88-90

要搞好思想政治教学,从大的方面讲,首先要优化教师队伍,大力推进继续教育;从教师本身讲,要积极参加继续教育,扩大自己的知识面,不断充实和发展自我;在教学中,要树立“为迁移而教”的思想,注意学科的横向联系,培养学生的综合思维能力和创新能力,把学生培养成符合现代科技发展趋势,适合社会主义现代化建设需要的“复合型人才”。  相似文献   

Losartan reduced connexin43 expression in left ventricular myocardium of spontaneously hypertensive rats     

Zhao LL  Chen HJ  Chen JZ  Yu M  Ni YL  Zhang WF 《Journal of Zhejiang University. Science. B》2008,9(6):448-454

Objective: To assess the effect of angiotensin Ⅱ type 1 (AT1) receptor antagonist losartan on myocardium connexin43 (Cx43) gap junction (GJ) expression in spontaneously hypertensive rats (SHRs) and investigate possible mechanisms. Methods: Sixteen 9-week-old male SHRs and 8 age-matched male Wistar-Kyoto (WKY) rats were included in this study. SHRs were randomly divided into two groups to receive losartan at 30mg/(kg·d) by oral gavage once daily for 8 weeks (SHR-L) or vehicle (0.9% saline) to act as controls (SHR-V); WKY rats receiving vehicle for 8 weeks served as normotensive controls. At the end of the experiment, rats were sacrificed and the hearts were removed. Expressions of Cx43 and nuclear factor-kappaB p65 (NF-κB p65) proteins in all three groups were observed and further investigations on the effect of angiotensin Ⅱ type 1 receptor antagonist losartan (30mg/(kg·d), 8 weeks) on Cx43 expression were conducted with Western blot and immunohistochemistry. NF-κB p65 protein in nuclear extracts was determined by Western blot. Results: Left ventricular (LV) hypertrophy was prominent in SHRs, Cx43 and NF-κB p65 protein expressions were obviously upregulated and Cx43 distribution was dispersed over the cell surface. Treatment with losarton reduced the over-expressions of Cx43 and NF-κB p65 in LV myocardium. The distribution of Cx43 gap junction also became much regular and confined to intercalated disk after losartan treatment. Conclusion: Cx43 level was upregulated in LV myocardium of SHR during early stage of hypertrophy. Angiotensin Ⅱ type l receptor antagonist losartan prevented Cx43 gap junction remodeling in hypertrophied left ventricles, possibly through the NF-κB pathway.  相似文献   

量子计算与量子几何位相     

易学华  温慧强  易照曌 《嘉应学院学报》2009,27(6):33-36

从量子力学原理出发,说明量子计算是量子计算机的理论基础。量子计算机拥有比经典计算机更为强大的计算能力。而实现量子计算机的关键之一是使用量子几何相位来实现高保真度的普适量子逻辑门。先简要介绍量子计算的基本原理和量子计算机实现所存在的困难以及所采用的方案,然后重点讨论与实现量子计算机方案有关如核磁共振、腔量子电动力学(C-QED)和超导约瑟夫森隧结中的量子几何相位。  相似文献   

Effects of viscoelastic properties of tendon structures on stretch – shortening cycle exercise in vivo     

Keitaro Kubo  Hiroaki Kanehisa  Tetsuo Fukunaga 《Journal of sports sciences》2013,31(8):851-860

The aim of the present study was to examine the effects of viscoelastic properties of human tendon structures during stretch?–?shortening cycle exercise. The elongation of tendon and aponeurosis of the medial gastrocnemius muscle of 26 participants was measured by ultrasonography while they performed ramp isometric plantar flexion up to the voluntary maximum, followed by a ramp relaxation. The relationship between estimated muscle force and tendon elongation during the ascending phase was fitted to a linear regression, the slope of which was defined as stiffness. The percentage of the area within the muscle force?–?tendon elongation loop relative to the area beneath the curve during the ascending phase was defined as hysteresis. In addition, maximal voluntary concentric contractions at 2.09 and 3.14 rad?·?s^?1 with and without prior eccentric contractions were performed. The difference in the concentric torque at equivalent joint angles with and without prior eccentric contractions (i.e. pre-stretch augmentation) was negatively correlated with stiffness (P <?0.05) and hysteresis (P <?0.05). Furthermore, there was a higher correlation between the pre-stretch augmentation and the viscoelastic properties index – that is, the sum of normalized score values of stiffness and hysteresis (P <?0.01) – than with either stiffness or hysteresis alone. The results of this study suggest that performance during stretch?–?shortening cycle exercise is significantly affected by the viscoelastic properties of the tendon structures.  相似文献   

Threshold frequency of an electrically induced cramp increases following a repeated,localized fatiguing exercise     

Marcus B. Stone  Jeffrey E. Edwards  Kellie C. Huxel  Mitchell L. Cordova  Christopher D. Ingersoll  J. Patrick Babington 《Journal of sports sciences》2013,31(4):399-405

Abstract

Though clinical observations and laboratory data provide some support for the neuromuscular imbalance theory of the genesis of exercise-associated muscle cramps, no direct evidence has been published. The purpose of this study was to determine the effect of local muscle fatigue on the threshold frequency of an electrically induced muscle cramp. To determine baseline threshold frequency, a cramp was electrically induced in the flexor hallucis brevis of 16 apparently healthy participants (7 males, 9 females; age 25.1 ± 4.8 years). The testing order of control and fatigue conditions was counterbalanced. In the control condition, participants rested in a supine position for 30 min followed by another cramp induction to determine post-threshold frequency. In the fatigue condition, participants performed five bouts of great toe curls at 60% one-repetition maximum to failure with 1 min rest between bouts followed immediately by a post-threshold frequency measurement. Repeated-measures analysis of variance and simple main effects testing showed post-fatigue threshold frequency (32.9 ± 11.7 Hz) was greater (P < 0.001) than pre-fatigue threshold frequency (20.0 ± 7.7 Hz). An increase in threshold frequency seems to demonstrate a decrease in one's propensity to cramp following the fatigue exercise regimen used. These results contradict the proposed theory that suggests cramp propensity should increase following fatigue. However, differences in laboratory versus clinical fatiguing exercise and contributions from other sources, as well as the notion of a graded response to fatiguing exercise, on exercise-associated muscle cramp and electrically induced muscle cramp should be considered.  相似文献   

对慢跑鞋力学舒适性评价的研究     

胡宗祥  陈学灿  关雪琼 《体育科学研究》2013,(6):72-77

为了对慢跑鞋的舒适性进行评价以及对不足进行改进提供参考.通过问卷调查法对测试鞋的舒适性进行主观评价,并借助红外光点运动分析系统和足底压力测试系统等生物力学测试方法,分别对在自然行走和慢跑两种状态下下肢步态的一些运动力学指标进行测试与研究.结果表明：测试鞋宽度和长度的合脚性较好;测试鞋的缓冲支持性能稍差;男女测试鞋在弓部舒适性及足底压强的表现存在差异.  相似文献   

中长跑运动员跟腱损伤创新绷带包扎方法的应用研究     

滕育松  于亮 《大连大学学报》2007,28(3):122-124

[目的]为中长跑运动员在训练和比赛中制定有效的、创新的包扎方法.[方法]通过对36名中长跑运动员在训练和比赛中的跟腱损伤进行包扎处理和相关统计,并与传统方法进行对比分析,得出相应结论.[结果]与传统方法相比,创新的绷带包扎方法在运动员训练和比赛中对跟腱损伤的缓解和预防均十分有效.[结论]该方法提高了运动员的训练质量,有助于其提高运动成绩,有很高的实用价值.  相似文献