基于篮球课体能训练的虚拟仿真系统的设计与实现

为了解决传统篮球课堂教学存在的弊端,设计了学生运动训练的虚拟仿真系统.首先对篮球运球动作信息进行捕捉,对篮球运球动作进行三维仿真,构建人体模型图和设计人物角色,获取虚拟的篮球运动场馆以及篮球运动员的技术动作虚拟仿真结果,然后采用动作捕捉技术对虚拟仿真结果中关键信息节点的运动轨迹进行追踪,获取篮球运动员训练过程中腿部骨骼的运动轨迹,通过控制这些关键骨骼的运动轨迹来控制虚拟运动员的训练过程.实验结果表明,该系统能够获得理想的篮球体能训练效果.     

心理暗示训练在篮球技术教学中的应用研究

实验研究表明,在篮球基本技术训练中应用“运动表象”可帮助学生正确理解动作概念,建立清晰的动作表象,并有利于学生的篮球技术和心理素质的同步发展,对提高篮球基本技术训练效果有积极地促进作用。     

“斗牛”比赛对小学生篮球技术保持与发展的实验研究

在篮球教学中,教师们往往重视学生对技术的学习,忽视了学生对技术动作的保持与发展。实验研究表明,在篮球课中运用三对三＂斗牛＂比赛,可以有效地帮助学生学习篮球技术,并且对技术的保持与发展有很大的促进作用。     

篮球组合技术在教学和训练中的应用

篮球组合技术是篮球教学和训练的重要组成部分,是学生在掌握基本动作的基础上进一步提高自身篮球技术的重点和难点。     

试论篮球技术的程序教学

篮球技术教学的目的是,使学生掌握正确的技术动作,并能准确、合理地运用.本文试提出篮球技术的程序教学法,以促进教学水平的提高.实施教学的有关因素1.按《教学大纲》要求,基本技术教学时数(42小时)占授课总时数的36.2%,居各项教学内容的首位.而体育系通用教材《篮球》所包括的技术动作达八十个之多,由此明显地反映出,篮球技术教学的任务重,质量要求高,教材内容多,教学时数少,在平均不足一     

目标量化用于篮球教学的尝试

目标量化是教学中在代表性的技术动作上设置目标后,加以量化来判断学生对该技术动作掌握程度的一种新的教学方法。在篮球教学中运用目标量化教学方法,增强了反馈信息,加快篮球动作技术的掌握和培养,学生学习的主动性和自觉性作用是显著的。对提高高校体育教学质量有积极的促进作用。     

浅谈体育系学生篮球对抗能力的培养

现代篮球运动竞争之激烈,对抗性之强,甚至达到白热化程度,这是有目共睹的事实.这就要求篮球运动员必须具备强壮的体格,良好的身体素质,顽强的意志品质.一个篮球运动员,只是掌握了正确、规范、熟练的篮球技术动作,并有了相当数量的篮球组合技术动作,而在比赛中经不起攻守双方激烈对抗的考验,那么,他掌握的技术动作的实战性,就得不到充分发挥,也就失去了比赛价值,就不能说他已掌握了篮球技术.     

表象训练在篮球罚球技术教学中的实验研究

在体育运动训练之中,正确清晰的动作表象是形成运动技能的前提,在篮球罚球技术教学过程中,应用＂表象训练法＂能帮助学生准确地理解和掌握这一技术动作,建立正确的条件反射。实验证明,该教学方法有利于提高学生篮球罚球技术的教学效果。     

不同篮球技能学生的运动表象及目标设置的调查

篮球运动作为在一定时空条件下的动作体系过程,与运动表象和目标设置有着非常密切的联系。本文通过文献资料,问卷调查等方法,发现在篮球基本技能训练中应用"运动表象"和"目标设置"可帮助学生正确理解动作概念,建立清晰的目标,同时有利于篮球技术和心理素质的同步发展,对篮球基本技能训练效果有积极地促进作用。     

指导发现式教学在篮球普修课教学中运用的实验研究

通过实验的方法,将"发现"式的学习理论应用于教学实践。实验表明:实验班的学生在篮球专项技术、操作思维能力、身体素质及运用篮球知识和技术解决问题的能力等方面明显高于对照班。"指导式发现教学"可使初学者尽快地掌握正确的技术动作,缩短技能形成所需要的时间;可使学生在学习技术动作的同时,深入系统地掌握理论知识;可培养学生运用知识进行观察、分析、判断能力,养成主动的学习习惯。     

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.     

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.     

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.     

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.     

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.     

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.     

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