In order toclarify regional ecological security status and formation mechanism of regional ecological security barriers in underdeveloped regions of China,we took Yunnan province as a case to evaluate its regional eco...In order toclarify regional ecological security status and formation mechanism of regional ecological security barriers in underdeveloped regions of China,we took Yunnan province as a case to evaluate its regional ecological security by using entropy matter-element model,comprehensive index and GIS spatial method,and we diagnosed itsobstacle factors through obstacle degree model. We found a low overall level of regional ecological security in Yunnan. Only Kunmingfell into the good level, 68% of the regions were below the critical safe level. For the vast majority of regions in Yunnan, their regional ecological security was unstable. The indexes related to per capita resources, geological and topographyenvironment, economic, and technologywere at the unsafe or dangerous level.The indexes related to urban expansion, level of income, cultivated land quality were at the level of critical safety. The indexes concerning urban management capacity, airqualityand waterenvironment were at the good or ideallevel. Yunnan's regional ecological security was not good due to natural obstructive environment itself, simultaneously lower backward economic and social level restricted the ability of ecological security response to manage ragile ecological environment. The results of the composite index wereroughly consistent with those of the entropy weight matterelement model. The mean values of the classification index,from high to low, were: the state index>the response index>the pressure index. The state index and the response index had a significant mutual promotion to each other.The regions with good composite index, state index and response index mainly distributed in the central regions of Yunnan Province. Spatial autocorrelation of regional ecological security level in Yunnan was not obvious. Water resources, economic and social development were main obstacle factors of the regional ecological security.When distinguishing with obstacle type, Kunming belonged to natural ecological environment barrier type, while other regions展开更多
目的探讨400米障碍训练伤与核心力量训练时间的关系,并分析影响训练伤发生的相关因素。方法以参加400米障碍训练的207名学员为研究对象,2018年3月调查学员的一般身体数据、训练伤史、过去6个月进行核心力量训练的情况等数据;并于2018年...目的探讨400米障碍训练伤与核心力量训练时间的关系,并分析影响训练伤发生的相关因素。方法以参加400米障碍训练的207名学员为研究对象,2018年3月调查学员的一般身体数据、训练伤史、过去6个月进行核心力量训练的情况等数据;并于2018年3-4月对该人群进行为期2个月的400米障碍训练;分析训练伤史、训练时的腰围和体质量指数(BMI)与400米障碍训练伤发生的关系。结果在2个月的400米障碍训练中,共59人(占30.41%)发生63例次训练伤,其中上肢损伤5例次(占7.94%),下肢损伤55例次(占87.30%),躯干损伤3例次(占4.76%)。有受伤史的学员发生训练伤的比例更高(52.54%vs 22.22%,P=0.000)。核心训练时间越长,训练伤发生比例越低(Linear by linear associatationχ~2=6.970,P=0.008)。多元logistic回归发现训练时间<4 h的学员发生训练伤的风险是≥4 h的学员2.369倍;且BMI每增加1 kg/m^2,训练中发生训练伤的风险增加1.259倍(P=0.017)。结论加强核心力量训练,控制BMI,有助于减少400米障碍训练伤发生风险。展开更多
基金funded by the National Science-technology Support Plan Projects of China (Grant No.2015BAD07B0105)Yunnan Education Department Fundof China (2014Y315)
文摘In order toclarify regional ecological security status and formation mechanism of regional ecological security barriers in underdeveloped regions of China,we took Yunnan province as a case to evaluate its regional ecological security by using entropy matter-element model,comprehensive index and GIS spatial method,and we diagnosed itsobstacle factors through obstacle degree model. We found a low overall level of regional ecological security in Yunnan. Only Kunmingfell into the good level, 68% of the regions were below the critical safe level. For the vast majority of regions in Yunnan, their regional ecological security was unstable. The indexes related to per capita resources, geological and topographyenvironment, economic, and technologywere at the unsafe or dangerous level.The indexes related to urban expansion, level of income, cultivated land quality were at the level of critical safety. The indexes concerning urban management capacity, airqualityand waterenvironment were at the good or ideallevel. Yunnan's regional ecological security was not good due to natural obstructive environment itself, simultaneously lower backward economic and social level restricted the ability of ecological security response to manage ragile ecological environment. The results of the composite index wereroughly consistent with those of the entropy weight matterelement model. The mean values of the classification index,from high to low, were: the state index>the response index>the pressure index. The state index and the response index had a significant mutual promotion to each other.The regions with good composite index, state index and response index mainly distributed in the central regions of Yunnan Province. Spatial autocorrelation of regional ecological security level in Yunnan was not obvious. Water resources, economic and social development were main obstacle factors of the regional ecological security.When distinguishing with obstacle type, Kunming belonged to natural ecological environment barrier type, while other regions
文摘目的探讨400米障碍训练伤与核心力量训练时间的关系,并分析影响训练伤发生的相关因素。方法以参加400米障碍训练的207名学员为研究对象,2018年3月调查学员的一般身体数据、训练伤史、过去6个月进行核心力量训练的情况等数据;并于2018年3-4月对该人群进行为期2个月的400米障碍训练;分析训练伤史、训练时的腰围和体质量指数(BMI)与400米障碍训练伤发生的关系。结果在2个月的400米障碍训练中,共59人(占30.41%)发生63例次训练伤,其中上肢损伤5例次(占7.94%),下肢损伤55例次(占87.30%),躯干损伤3例次(占4.76%)。有受伤史的学员发生训练伤的比例更高(52.54%vs 22.22%,P=0.000)。核心训练时间越长,训练伤发生比例越低(Linear by linear associatationχ~2=6.970,P=0.008)。多元logistic回归发现训练时间<4 h的学员发生训练伤的风险是≥4 h的学员2.369倍;且BMI每增加1 kg/m^2,训练中发生训练伤的风险增加1.259倍(P=0.017)。结论加强核心力量训练,控制BMI,有助于减少400米障碍训练伤发生风险。
