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拉拉带健美操作为有氧运动处方的探讨 被引量:2
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作者 周建社 房美玉 《体育学刊》 CAS 北大核心 2001年第5期81-83,共3页
从拉拉带的“拉、弹、折、绕、缠”等特性入手,利用拉拉带的“拉、弹”性能创编成大学生喜闻乐见的健美及运动形式;以拉拉带的被动反弹特性作为调控身体局部负荷量,增加有效扩胸动作的创编思路,使肌肉工作的主、被动用力交替进行,... 从拉拉带的“拉、弹、折、绕、缠”等特性入手,利用拉拉带的“拉、弹”性能创编成大学生喜闻乐见的健美及运动形式;以拉拉带的被动反弹特性作为调控身体局部负荷量,增加有效扩胸动作的创编思路,使肌肉工作的主、被动用力交替进行,提高动作对胸廓肌群的刺激频率。利用万通遥测心率表(芬兰产)监控动作强度,使成套动作的靶心率控制在最大心率的70%-80%内,即相当最大吸氧量的70%左右。 展开更多
关键词 拉拉带健美操 动作创编 有氧运动处方 最大吸氧量
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拉拉带健美操教学方法初探
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作者 樊克良 《林区教学》 2015年第7期105-105,共1页
拉拉带健美操颜色鲜艳丰富,动作设计简单易学,有张有弛,高低起伏,时进时退,左右变换,动作多样丰富,易吸引练习者的兴趣,更有助于健身、健美、健心。对拉拉带健美操教学方法进行初步探讨,旨在提高教学质量,使它更好地为学生健身服务。
关键词 拉拉带 健美操 教学方法
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Changes in Streamflow Regime Due to Anthropogenic Regulations in the Humid Tropical Western Ghats, Kerala State, India
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作者 ABE George ERINJERY JOSEPH James 《Journal of Mountain Science》 SCIE CSCD 2015年第2期456-470,共15页
Regulation of streamflow by a reservoir creates a flow regime much different from the preimpoundment period flow regime. Hydro-Electric Projects(HEPs) commissioned in the Western Ghat regions of the Kerala State, Indi... Regulation of streamflow by a reservoir creates a flow regime much different from the preimpoundment period flow regime. Hydro-Electric Projects(HEPs) commissioned in the Western Ghat regions of the Kerala State, India during the last four decades caused considerable changes in the flow regimes of the rivers of the Kerala State in southwest India. In this paper, the Indicators of Hydrologic Alteration(IHA) approach proposed by Richter et al.(1996) is used to analyze flow regime changes in the Periyar and Muvattupuzha Rivers, due to the construction of the Idukki(1976), Idamalayar(1987) and Lower Periyar(1997) HEPs in the high ranges of the Western Ghats. Normal rainfall years(annual rainfall values within mean ± 0.75 standard deviation limits) are only considered in the analysis to focus on hydrologic alterations due to human activities. The mean hydrologic alteration in the Periyar River(deviation from the pre-development hydrologic indicator values) after commissioning of three HEPs is 35%. Inter-basin water transfer after power generation from the Idukki HEP resulted in a higher discharge in the adjacent Muvattupuzha River, leading to considerable changes in the hydroenvironment(mean hydrologic alterations varying between 57 to 63%). IHA parameters showing hydrologic alterations above the 67 th Percentile werefurther analyzed. For each of the pre-construction hydrologic parameters ± 1 standard deviation from the mean is set as the upper and lower management target limits. The values of each IHA parameter beyond these targets are considered as nonattainment. Considerable hydrologic alterations are observed, especially for low flows in both basins. Inter-basin transfer induced larger changes in flow parameters compared to intra-basin regulations. The study shows that under a proper water release and diversion scheme, the non-attainment of IHA parameters(values fall beyond the target limits) can be reduced. The findings of the study will be greatly beneficial to regional water management and restoration of an eco-environmental system in the humid tropical region. 展开更多
关键词 Range variability approach Hydroelectric projects Humid tropics Flow regime changes Inter-basin regulation Intra-basin regulation
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Research on the Relationship of ENSO and the Frequency of Extreme Precipitation Events in China 被引量:6
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作者 Wei Li Panmao Zhai Jinhui Cai 《Advances in Climate Change Research》 SCIE 2011年第2期101-107,共7页
Based on a daily precipitation observation dataset of 743 stations in China from 1951 2004, the F distribution function is used to calculate the probability distribution of daily precipitation and to define extreme pr... Based on a daily precipitation observation dataset of 743 stations in China from 1951 2004, the F distribution function is used to calculate the probability distribution of daily precipitation and to define extreme precipitation events. Based on this, the relationship of ENSO and the frequency of extreme precipitation events is studied. Results reveal that ENSO events have impact on extreme precipitation events, with different magnitudes at different regions and seasons. In general, during winter and spring, extreme precipitation events occur more often during E1 Nino events than during La Nina events. While during summer and autumn, the opposite is found. The relationship of a two season-lag ENSO and extreme precipitation frequency shows different pattern. Extreme precipitation events occur more often in several regions if an ENSO warm phase happened in the central-eastern tropical Pacific two seasons before. No similar impacts of El Nino and La Nina on the frequency of extreme precipitation events are found. 展开更多
关键词 extreme precipitation F distribution function ENSO NiHo 3.4 sea surface temperature
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Exploration on Internal Inlaying Drip Irrigation Pipe and Standards
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作者 张胜军 周婷 +1 位作者 冉文生 李学颖 《Agricultural Science & Technology》 CAS 2014年第5期866-869,873,共5页
In the test, internal inlay drip irrigation pipes with different wal thicknesses or diameters (¢at 12 mm and 16 mm) were tested under varying tension forces and it was concluded that 90 N is the rational one. What... In the test, internal inlay drip irrigation pipes with different wal thicknesses or diameters (¢at 12 mm and 16 mm) were tested under varying tension forces and it was concluded that 90 N is the rational one. What’s more, the smal er drip-irrigation inner diameter, the thinner wal thickness, and the higher tension force, the lower acceptability, and the larger drip-irrigation inner diameter, the thicker wal thickness, and the lower tension force, the higher acceptability. The causes were analyzed in the research, including manufacturing technique leading to disqualifica-tion and different specifications with the same demands on techniques, and inadap-tation to tension force at 130 N. 展开更多
关键词 Internal inlaying drip irrigation pipe Pul out resistance test Tension range Chinese National standards
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