期刊文献+
共找到9篇文章
< 1 >
每页显示 20 50 100
波速球在力量训练中的应用 被引量:1
1
作者 孙业远 蒋林稼 《体育教学》 2021年第1期83-83,共1页
由优质橡胶和塑料制成的波速球在体育训练和健身房中广泛应用,对于身体各部位肌肉力量发展有很好的促进作用,训练用途和方法十分广泛,是一款非常值得推广的新型体育器材。
关键词 波速球 力量训练 应用
下载PDF
波速球在运动康复训练中的作用
2
作者 杨安均 杨亚军 《科技资讯》 2021年第29期179-180,183,共3页
波速球(BOSU)通过提供不稳定平面,已经成为运动康复训练的组成部分,尤其是在以健康为导向的运动康复训练中,日渐成为研究的重点。而BOSU在运动康复训练理论方面的研究相对较少。该文采用文献资料法,对国内外现阶段BOSU在运动康复训练中... 波速球(BOSU)通过提供不稳定平面,已经成为运动康复训练的组成部分,尤其是在以健康为导向的运动康复训练中,日渐成为研究的重点。而BOSU在运动康复训练理论方面的研究相对较少。该文采用文献资料法,对国内外现阶段BOSU在运动康复训练中的应用进行论述,包括在急慢性抗阻训练、平衡训练中等方面的作用,为进一步丰富体能康复训练手段,明确BOSU运动康复训练作用,推动BOSU在体能康复训练中的应用发展提供理论依据。 展开更多
关键词 波速球 体能训练 运动康复 作用
下载PDF
波速球训练对改善青少年足球运动员核心稳定性的实验研究
3
作者 杜东升 《青少年体育》 2022年第12期50-53,共4页
核心稳定性在足球训练领域受到广泛的重视,是足球比赛中保持身体重心稳定、技术稳定发挥的关键因素之一。目前核心稳定性训练是足球体能训练中较为重要的训练内容。本文运用文献资料法、实验法、数理统计法,探讨波速球训练对改善青少年... 核心稳定性在足球训练领域受到广泛的重视,是足球比赛中保持身体重心稳定、技术稳定发挥的关键因素之一。目前核心稳定性训练是足球体能训练中较为重要的训练内容。本文运用文献资料法、实验法、数理统计法,探讨波速球训练对改善青少年足球运动员核心稳定性的作用。 展开更多
关键词 波速球训练 青少年 运动员 核心稳定性
下载PDF
波速球对体育中考斜身引体项目的影响
4
作者 徐勇 《中学教学参考》 2022年第21期37-39,共3页
斜身引体是福建省体育中考改革后女生新增的考试项目。文章采用文献资料法、访谈法、实验法、数理统计法等研究方法,结合教师的体育教学经验,利用波速球对斜身引体项目所需力量进行实验性训练研究。通过对比实验前后学生成绩,分析波速... 斜身引体是福建省体育中考改革后女生新增的考试项目。文章采用文献资料法、访谈法、实验法、数理统计法等研究方法,结合教师的体育教学经验,利用波速球对斜身引体项目所需力量进行实验性训练研究。通过对比实验前后学生成绩,分析波速球对斜身引体项目成绩的影响,以期找到快速提高体育中考斜身引体项目成绩的训练方法,为初中体育教学提供参考依据。 展开更多
关键词 波速球 体育中考 斜身引体
下载PDF
BOSU球训练对高水平小学生啦啦操转体类动作稳定性的影响研究
5
作者 李瑛毅 陈燕文 +1 位作者 何婷 仇晓晨 《体育世界》 2022年第5期113-116,共4页
啦啦操分为舞蹈类啦啦操和技巧类啦啦操,舞蹈啦啦操分为花球啦啦操、爵士啦啦操、街舞啦啦操,三种舞蹈分别具有不同的风格。舞蹈啦啦操难度包含三类:转体类、跳步类、柔韧与平衡类。其中,转体类难度是各个队伍在平常的训练过程中最不容... 啦啦操分为舞蹈类啦啦操和技巧类啦啦操,舞蹈啦啦操分为花球啦啦操、爵士啦啦操、街舞啦啦操,三种舞蹈分别具有不同的风格。舞蹈啦啦操难度包含三类:转体类、跳步类、柔韧与平衡类。其中,转体类难度是各个队伍在平常的训练过程中最不容易掌握、训练起来最难的、在比赛场中也最不容易整齐和稳定发挥的一类难度,训练时往往会花费大量的时间,是高质量花球啦啦操队伍的重要表现形式。本文主要通过文献资料法、问卷调查法、专家访谈法、实验法,对于花球啦啦操转体类难度中的“阿拉 C 杠”这个典型技术动作进行实验。以BOSU 球训练对比传统的素质训练,在 12 周训练后,对于小学生花球啦啦操转体类动作稳定性的影响进行数据分析,并对今后的训练方法体系提出建议,如加强小肌肉群和核心稳定性的训练,加强动作分解练习与完整练习,以此来提高旋转难度动作的训练质量。 展开更多
关键词 波速球 小学生 啦啦操 转体难度 训练方法
下载PDF
Converted wave AVO inversion for average velocity ratio and shear wave reflection coefficient 被引量:5
6
作者 魏修成 陈天胜 季玉新 《Applied Geophysics》 SCIE CSCD 2008年第1期35-43,共9页
Based on the empirical Gardner equation describing the relationship between density and compressional wave velocity, the converted wave reflection coefficient extrema attributes for AVO analysis are proposed and the r... Based on the empirical Gardner equation describing the relationship between density and compressional wave velocity, the converted wave reflection coefficient extrema attributes for AVO analysis are proposed and the relations between the extrema position and amplitude, average velocity ratio across the interface, and shear wave reflection coefficient are derived. The extrema position is a monotonically decreasing function of average velocity ratio, and the extrema amplitude is a function of average velocity ratio and shear wave reflection coefficient. For theoretical models, the average velocity ratio and shear wave reflection coefficient are inverted from the extrema position and amplitude obtained from fitting a power function to converted wave AVO curves. Shear wave reflection coefficient sections have clearer physical meaning than conventional converted wave stacked sections and establish the theoretical foundation for geological structural interpretation and event correlation. "The method of inverting average velocity ratio and shear wave reflection coefficient from the extrema position and amplitude obtained from fitting a power function is applied to real CCP gathers. The inverted average velocity ratios are consistent with those computed from compressional and shear wave well logs. 展开更多
关键词 Converted wave AVO INVERSION ATTRIBUTE velocity ratio.
下载PDF
Direct reduction of carburized pre-reduced pellets by microwave heating 被引量:2
7
作者 胡兵 黄柱成 +1 位作者 易凌云 姜涛 《Journal of Central South University》 SCIE EI CAS 2014年第1期351-357,共7页
A new iron-making process using carburized pre-reduced iron ore pellets and microwave heating is investigated. The pre-reduced pellets, with a porous structure, and fine particles are carburized homogeneously at 400-6... A new iron-making process using carburized pre-reduced iron ore pellets and microwave heating is investigated. The pre-reduced pellets, with a porous structure, and fine particles are carburized homogeneously at 400-650 ℃ in a CO atmosphere. The carburized carbon not only acts reaction as a reduction agent, but also absorbs microwave in the reduction process. Hence, the carburized pre-reduced pellets can be rapidly reduced by microwave heating. There are three procedures involved in the process, namely, gas-based pre-reduction, low-temperatttre carburization and deep reduction by microwave heating. Carburized pre-reduced iron ore pellets show a rapid temperature rise that is twice as fast as the results for pre-reduced pellets in the laboratory. This not only improves the efficiency of the microwave heating, but also accelerates the reduction of iron oxides. The temperature of the pre-reduced pellets rises to 1050 ℃ in 45 min when the carburization rate is 2.02%, and the metallization rate and compressive strength reach 94.24% and 1725 N/pellet, respectively. 展开更多
关键词 oxidized pellets PRE-REDUCTION CARBURIZING microwave heating direct reduction
下载PDF
Study on Internal Waves Generated by Tidal Flow over Critical Topography 被引量:4
8
作者 JIA Xiaona CHEN Xu +1 位作者 LI Qun LI Qiang 《Journal of Ocean University of China》 SCIE CAS 2014年第5期728-732,共5页
Resonance due to critical slope makes the internal wave generation more effectively than that due to supercritical or subcritical slopes(Zhang et al., 2008). Submarine ridges make a greater contribution to ocean mixin... Resonance due to critical slope makes the internal wave generation more effectively than that due to supercritical or subcritical slopes(Zhang et al., 2008). Submarine ridges make a greater contribution to ocean mixing than continental margins in global oceans(Müller, 1977; Bell, 1975; Baines, 1982; Morozov, 1995). In this paper, internal wave generation driven by tidal flow over critical topography is examined in laboratory using Particle Image Velocimetry(PIV) and synthetic schlieren methods in synchrony. Non-tidal baroclinic velocities and vertical isopycnal displacements are observed in three representative regions, i.e., critical, outward-propagating, and reflection regions. Temporal and spatial distributions of internal wave rays are analyzed using the time variations of baroclinic velocities and vertical isopycnal displacement, and the results are consistent with those by the linear internal wave theory. Besides, the width of wave beam changes with the outward propagation of internal waves. Finally, through monitoring the uniformly-spaced 14 vertical profiles in the x-z plane, the internal wave fields of density and velocity fields are constructed. Thus, available potential energy, kinetic energy and energy fluxes are determined quantitatively. The distributions of baroclinic energy and energy fluxes are confined along the internal wave rays. The total depth averaged energy and energy flux of vertical profiles away from a ridge are both larger than those near the ridge. 展开更多
关键词 internal waves critical topography available potential energy kinetic energy baroclinic energy flux
下载PDF
The Effectiveness of Shallow Surface Geophysical Methods in Shear Wave Velocity Derivation
9
作者 Dewan Mohammad Enamul Haque A. S. M. Woobaidullah 《Journal of Civil Engineering and Architecture》 2018年第8期573-585,共13页
Shear wave velocity Vs is measured by the surface geophysical survey like MASW (multi-channel surface wave analysis) or RWM (refraction wave method) and by the subsurface method like PS logging. PS logging and RWM... Shear wave velocity Vs is measured by the surface geophysical survey like MASW (multi-channel surface wave analysis) or RWM (refraction wave method) and by the subsurface method like PS logging. PS logging and RWM are direct methods to derive shear wave velocity and MASW retrieves shear wave through the inversion of the surface wave. In this work, the effectiveness of surface methods (MASW and RWM) is compared with PS logging in determining shear wave velocity. For this purpose, shear wave velocity results Vs30 of 12 PS logging and MASW surveys conducted in Mymensingh Municipality in Bangladesh have been utilized. Additionally, the shear wave velocity results of three PS logging have been compared with the refraction profiles of RWM survey conducted in Rooppur nuclear power plant site in Bangladesh. The relative discrepancy between RWM and PS logging is found less (ranges from -3.92 to 0.93) compared to MASW and PS logging (+/-0.88 to 33.92). The correlation coefficient of Vs30 derived from RWM and PS logging is observed much better (0.60) compared to MASW and PS logging (0.40). The result is good considering the lateral lithologic variability and inherent differences among techniques. It is evident from the comparison that the RWM can be used as a cost-effective alternative to traditional borehole PS logging method for Vs30 determination and thus the number of down-hole logging tests might be significantly reduced. 展开更多
关键词 Shear wave velocity surface wave velocity shallow seismic survey inversion.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部