优秀男子跆拳道运动员膝关节肌群肌力测试与特征研究

采用ISOMED2000获得陕西省优秀跆拳道运动员膝关节等速向心收缩的生物力学特征,为我省跆拳道运动员力量训练提供一定的参考依据.研究发现：中快速以及快速条件下膝关节屈伸肌群力量下降较多,需要加强快速以及中快速情况下的力量训练;左右膝关节屈伸肌群等速向心收缩平均功率在300°/s时达到最大值,此角速度下屈伸肌群的爆发力最大;省跆拳道运动员右膝的力量与爆发力强于左膝,建议加强左膝屈伸肌群的力量练习与训练中的实战进攻训练,提高其爆发力;左右膝关节屈伸肌群力量比值不合理,屈肌力量相对较低,建议加强膝关节屈肌群的力量训练;左右膝关节屈肌较伸肌易疲劳（P〈0.05）,应首先加强左右膝关节屈肌的力量耐力.     

跆拳道双飞踢技术动作运动特征分析

跆拳道运动中双飞踢技术,有着不可比拟的优势和特点,是跆拳道运动员在比赛中常用到的技术。国内关于双飞踢技术的肌电特征研究处于空白,没有相关的理论研究对双飞踢技术中的肌肉角度、收缩速度、长度等进行详细的解释,本文选取跆拳道运动员的双飞踢动作作为研究对象,运用肌电知识对其进行分析,揭示跆拳道运动员双飞踢技术运用过程中肌肉的用力特征,以期得出双飞踢动作的合理动作过程和发力方法,有助于双飞踢动作技能的形成。     

自由泳游泳运动员膝肘关节等速力量测试研究

对于自由泳运动员来说,上肢的划水动作与下肢打腿动作需要肘关节与膝关节的参与,这两个关节对自由泳运动起着至关重要的作用,但对这两个关节的力量特点的研究却不多见。本研究拟对西安体育学院10名优秀运动员的膝肘关节的屈伸肌群进行等速力量测试,得到自由泳运动员膝、肘关节屈伸肌群的力量特点,为运动员的力量训练以及动作技术完善提供一定的理论依据。     

高校运动队业余训练方法探讨

业余训练应通过提高训练质量使学生达到或接近优秀运动员训练水平．增加运动负荷要考虑运动员实际训练能力及人体不同器官系统在承受同一生理负荷上的差异．选择力量训练时应在动作姿势、动作幅度、肌拉力方向与收缩速度等方面与专项动作一致或相似     

铅球专项力量训练方法的探索

铅球的项目特点为速度力量型项目。专项力量是专项速度的基础,专项力量的提高有利于专项技术的表现,提高专项力量的方法与动作用力顺序要符合专项技术的要求。在专项力量训练中如何提高运动员基础力量、技能力量与投掷力量是关键内容之一,如何将专项技术的发力顺序与专项力量的训练手段相一致,结合不同训练水平的运动员自身的特点,达到神经系统高度调控相应肌肉的目的,并根据不同性别年龄选择不同的专项力量训练方法,提高运动员的竞技能力。     

核心区力量训练对提高跳水运动员竞技能力的研究

核心区力量训练对跳水运动员具有重要意义,它能够全方位地弥补和提升跳水运动员的各项身体素质,有利于运动员更加完美而流畅地展现专项技术动作.运用文献资料法、专家访谈法、实验法和数理统计法等,对河北省跳水队12名队员进行了为期15周的核心区力量训练,并在实验前后进行了相应指标的检测.实验结果显示,实验组跳水运动员与对照组相比核心区力量提高显著,跳水技术动作得到改善,运动员竞技水平实现突破.     

论力量素质对健美操运动员的重要性

从竞技健美操规则的演变过程、难度动作用力的生理学角度及国内外优秀运动员对难度动作选择的有关数据的统计对比，论述了力量素质对竞技健美操运动员获得成功的重要意义，提出要跟上现代健美操运动发展的步伐，在训练中必须加强运动员的力量素质训练。     

我国蹦床运动员下肢肌肉力量等动测试研究

运用等动肌肉力量测试的方法,对六名国家健将级蹦床网上运动员下肢肌群力量进行测定,根据髋、膝、踝三关节力矩值的屈伸比得到以下结论:髋关节伸肌群为蹦床运动员下肢三大关节中量最重要的运动肌群;目前国内对蹦床网上运动员髋关节肌群的力量训练符合蹦床运动技术要求;蹦床运动员完成空中直体难度动作时屈髋是运动员在空中对肢体的控制意识不够所致;蹦床运动员完成空中屈体或团身动作时不能在垂直位开腿是运动员对开腿时机掌握不好所致。     

游泳运动员专项力量训练的研究

本文通过文献资料法、逻辑法等研究方法,结合运动训练的实践经验对游泳的专项力量训练理论与方法进行深入的探讨与分析,认为游泳运动员力量训练中游泳技术动作结构与完成动作的主要工作肌肉群用力相似才能获得最佳的效果,发展身体各个部位的力量应该采用的不同训练手段和方法,应该注重陆上和水上力量练习的转化关系。     

增强速度滑冰运动员腿部力量的训练方法

为提高运动员的专项力量训练效率和专项运动能力,针对滑冰运动的腿部用力特点,提出了一种减小大腿伸肌离心收缩负荷的腿部力量训练方法,并利用肌电分析的手段,实验比较了在该训练方法和负重深蹲训练方法训练中腿部肌肉活动的差异.结果表明: 用该训练方法进行训练时,运动员腿部肌肉的活动状况更接近于滑冰运动中肌肉的活动状况,力量训练的专项化程度更高,更适合于进行腿部专项力量训练.     

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.     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.