影响跆拳道运动员动作速度的因素

跆拳道运动中手脚并用，主要以脚为主，多采用直线的连续攻击和快速连贯的踢法组合，而跆拳道的动作速度在跆拳道运动中起着至关重要。选取广州体院跆拳道运动员30名为研究对象，以访谈法，文献资料法，数据统计法对影响跆拳道动作速度的因素进行了探讨，结果表明．影响跆拳道运动员动作速度的因素有运动员技术水平，心理因素和教练员的训练方法等，只有加强一般素质与专项素质的训练，并注意从基本技术入手打好基础，才能有效的提高动作速度。     

从16届亚运会跆拳道比赛看跆拳道技战术发展趋势

为研究新规则背景下使用电子护具对跆拳道比赛技战术的影响及其发展趋势,以16届亚运会跆拳道决赛阶段比赛为研究对象,采用现场观摩与录像观察等方法与北京奥运会、11届全运会跆拳道比赛进行对比研究.结果表明,新规则和电子护具使用下跆拳道运动员在比赛中使用技术和得分技术均呈现多样化趋势,表明全面技术训练的重要性.比赛节奏加快,激烈程度加强,难度技术使用增多,对运动员体能素质提出了更高的要求.对犯规判罚加强,增加了合理利用规则的必要性.     

浅谈跆拳道运动员的战术运用能力及训练方法

跆拳道属于竞技项目,在跆拳道比赛中不仅要求运动员有良好的技术和身体素质,而且运动员对战术的灵活运用更是取得胜负的关键所在。本文通过文献资料法、访谈法、问卷调查法、实地考察法对山东体育学院06级跆拳道专业54名运动员进行战术培养研究,对跆拳道战术进行分析,说明跆拳道战术在比赛中的运用的基本策略和原则。战术是培养跆拳道运动员获取优异成绩的重要因素。     

跆拳道运动的供能特征及其训练方法研究

跆拳道运动属于技能主导类对抗性项目,其比赛的节奏越来越快,比赛的强度、密度日益增大,比赛的攻防争夺异常激烈,具有很强的复杂性和对抗性.因此,跆拳道运动员的训练是一个复杂的过程.笔者结合跆拳道运动的项目特点,从运动生理学的视角,阐述了跆拳道运动的供能特征,切合跆拳道训练实际情况,探讨提高跆拳道运动员供能能力训练的方法,以期为跆拳道训练提出合理的理论依据.     

浅析篮球比赛中的节奏

篮球比赛中的节奏,是在比赛中通过个人战术行为和全队的战术配合表现出来的运动特征在比赛中控制好比赛节奏就等于掌握了比赛的主动权.本文对影响比赛节奏的主要因素,如何控制比赛节奏及训练诸方面进行了论述.     

广西跆拳道运动现状及发展对策研究

运用文献研究法、问卷调查法和数据统计法对广西跆拳道运动现状进行相关的调查与分析。调查结果显示：广西跆拳道竞技水平在国内处于较低水平，各地市水平差别较大；教练员整体素质和专业水平低是影响广西跆拳道发展的主要因素，同时高水平的训练、比赛环境、裁判队伍、经费等问题也是制约广西跆拳道运动发展的重要因素。     

浅谈跆拳道项目常见运动损伤的恢复性训练

在跆拳道训练比赛过程中或多或少常会有不同程度的运动损伤，一旦受到严重的运动损伤，必将影响运动员的正常训练及运动水平的提高，本文以踝及足部、小腿部分、膝关节部分和大腿部分四个部位在跆拳道项目中常见的运动损伤为研究对象。根据跆拳道项目的规律和特点，对于跆拳道训练或比赛中常见运动损伤从其生理特点、各部分病因及损伤机制等方面进行分析，提出合理有效的恢复练习方法。指导教练员及时的采取各种措施、合理安排伤后的训练，加速运动员功能恢复。     

对跆拳道运动员在比赛中判断能力的探讨

提高判断能力影响着跆拳道运动员在比赛中技、战术的正确运用和发挥。在诸多的跆拳道比赛中往往可以看到,有些进攻能力并不很强的运动员往往靠其良好的判断能力有效的遏制对方的凶猛攻击,并通过巧妙的出击而取得最后的胜利。从某种意义上说,一名跆拳道运动员的判断能力如何,会在很大程度上决定他是否能够跻身一流选手的行列。本文通过对跆拳道运动员在比赛中判断能力的思考和分析,从多方面进行阐述,明确指出了判断能力在训练和比赛中的重要性。为提高跆拳道运动员准确地判断能力,提高运动员技术水平提供参考。     

高校乒乓球运动员的专项速度训练

动作速度和移动速度是决定乒乓球运动速度的主要因素．动作和移动速度有它的基本特征和相关素质,高校乒乓球训练同样要抓紧运动员动作速度和移动速度的训练．     

跆眷道反击战术研究

跆拳道反击战术包括准备、防守、攻击、结束四个部分,运动员、教练员要根据运动员的技术特点、身体条件、训练水平、对手情况等,在比赛中指定合理的反击战术,并根据比赛的进程不断调整,实现最大的反击效果,从而获得比赛的胜利。     

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.     

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。     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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