专业短跑训练机的研究与设计

研究与设计的专业短跑训练机可以模拟真实的跑步环境,对运动员跑步动作的步频、步幅、发力时机,进行整体的技术训练,纠正多余的错误动作,并在跑步机上不断的进行反复训练,达到对运动员技术动作的分解与定型。对于不同运动员训练的特殊需要,教练根据运动员跑步过程中的发力情况,调节跑步机的阻尼大小,以便对其动作进行改进,并可对运动员长期的训练进行记录,以此总结出各个运动员的生理周期,更好的调整制定训练计划,提高训练效果。     

高原短跑运动员不同负荷前后血红蛋白和白细胞的变化

通过对短跑运动员血液有形成分变化的测试和分析,证明高原短跑运动员不同负荷训练前后,白细胞、血红蛋白明显增加;对高原短跑训练中负荷控制和医务监督提供实验依据.     

浅析少年短跑运动员训练中损伤的预防

短跑是一项历史悠久的比赛项目,倍受广大青少年的喜爱.当前在从事短跑训练过程中看到或听到的意外伤害事故时而发生,青少年训练也不例外.本文对少年短跑运动训练中受伤事故进行调查和分析,就如何预防作出一些解决办法.     

浅论现代100米跑技术的生理学基础及放松技术

现代短跑技术日趋完善,训练方法自成体系,优势短跑运动员所表现出来的特点是大幅度、高频率、放松好。放松能力的好坏已成为衡量一个运动员技术的重要指标。本文在放松的机制上,从运动生理学的角度对100米跑的技术与训练进行了分析研究,指出要从整体上理解和把握短跑的技术特点和发展趋势,更新观点,改革短跑教学训练,为进行科学化训练提高短跑运动成绩与技术水平。     

对短跑运动员力量训练方法的研究探讨

本文运用文献资料法、专家访谈法探讨短跑专项力量训练理论与方法。为有效提高运动员的成绩,既要加强以技术为中心的全面身体训练,又要突出专项力量能力训练,尤其是速度力量能力的训练,并努力掌握跑的合理技术。对于专项力量训练方法和训练手段的选择,关键在于能否因材施用,因人而异。根据对短跑项目技术特征的认识和对运动员个性的了解,选择和设计一些符合现代短跑力量训练的方法和手段,对运动员进行有针对性的训练,使短跑力量训练的观念、指导思想等有个全面的更新,最终达到提高短跑运动成绩的目的。     

短跑运动核心力量的作用与训练研究

核心力量训练是短跑训练中较为热门的训练方法,其功能是通过控制身体重心,使人体核心部位保持稳定,传递运动中的有效力量,减少无效做功,可以作为短跑传统力量训练的补充.通过对核心力量的阐释,详细探讨了核心力量对现代短跑技术的作用,提出短跑核心力量训练理论及方法,以期为短跑技术的教学与训练提供理论和实践参考.     

基于Android平台的人体成分分析仪的设计与实现

针对目前市场上的人体成分分析仪测量类型简单、人机体验性能较差的问题,本文运用Android平台的数据解析技术设计并实现了一种多参数、数字化和全智能的人体成分分析仪。该仪器前端采集模块采用8点接触电极采集方式,通过分节段测量实现全自动多频检测,获取人体生物电阻抗,并对采集的数据进行分析处理,通过Android平台提供友好的人机交互界面。该设计硬件电路结构简单,成本低廉,实现了对30种人体体质成分指标的测量计算、数据交互以及数据存储。     

短跑专项力量训练特点与训练方法

短跑是田径运动中的一项基础性运动项目,短跑速度是其他竞技运动的基础,短跑专项力量训练对于短跑速度的提升发挥至关重要的作用.短跑力量训练应当以力量的训练为指导,并且增加短跑技术的培训以及其他辅助项目.短跑专项力量训练根据具体短跑项目与段落的差异划分不同的训练侧重点.现代短跑专项力量训练主要技术项目有以髋为轴的高速摆动、伸髋技术、摆动式积极落地技术以及以肩为轴的摆动技术等.该文主要探讨短跑专项力量的训练特点以及训练方法,以期为短跑专项力量训练提供参考.     

短跑运动员的速度耐力训练

短跑项目的训练难度较大,运动员既需要有较强的速度能力,又需要有较好的速度耐力才能取得优异成绩.主要从成绩的比较和能量系统的特点,以文献资料法、数理统计法对短跑运动员的速度耐力训练问题进行了讨论和分析,提出了一些主要的训练方法,供短跑运动员在训练中参考.     

对弯道跑技术的认识及其训练方法的探讨

如今田径短跑项目的研究中,大多数教练员和运动员将重点都集中在了直道上,忽视了200米以及400米对弯道途中跑的研究与训练.这种现象的出现,不仅有教练员对短跑弯道跑技术的研究还不够明确,而且有运动员时短跑弯道跑技术的领会还不够精练所导致的.让教练员重视200米、400米弯道跑的技术研究,同时让运动员重视200米、400米弯道跑的技术训练,从而改变理论落后于运动实践的现象,本文针对弯道跑的技术及其训练进行研究探讨,希望能为短跑弯道跑技术的发展作出贡献.     

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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