福建沿海船舶事故的灰色关联分析   总被引：2，自引：0，他引：2  

黄志 《上海海事大学学报》2006,27(1):21-25

运用灰色系统理论中的关联分析原理,通过总结福建沿海最近10年的海事资料,计算出其关联度,由此分析福建沿海发生的海事与事故种类、事故船舶大小、事故发生时间和地理位置、事故发生原因等的关系,说明福建沿海海事特点、成因及规律,并提出改善福建沿海海上交通环境的一些建议与措施.  相似文献   

高水平游泳运动员肩关节损伤的特征   总被引：7，自引：1，他引：6  

刘明辉  雷芗生  黄力生 《体育学刊》2001,8(6):62-64

采用献资料、问卷调查、访问调查和数理统计，对1999年全国游泳冠军赛和锦标赛的18个省市代表队120名优秀运动员的肩关节损伤进行调查。结果显示：我国优秀游泳运动员肩关节损伤高达47.4％，且多为训练年限在6～9年的健将级以上运动员。患急性肩关节损伤多为主项爬泳、仰泳或蝶泳的。肩关节损伤的症状不同，治疗手段亦不尽相同。损伤的主要原因有局部训练负荷过重、训练水平不够、技术动作不合理等。针对肩关节损伤的发病原因、机理、症状，提出预防和治疗肩关节损伤的可行性建议。  相似文献   

中国女子足球运动员踝关节损伤特征   总被引：1，自引：0，他引：1  

罗兴华  周同 《军事体育进修学院学报》2002,21(2):33-35,45

采用文献资料和调查访问法，对参加广西梧州冬训的七支女子足球队的145名运动员进行了踝关节损伤的调查与分析，结果显示：我国成年女足运动员的踝关节损伤率为33%。在踝关节损伤中，踝关节事韧带的损伤率为60.6%，且多发生在训练年限1～5年的运动员。损伤的原因主要是训练水平不足、局部负荷过重、技术动作不合理等。针对踝关节损伤的原因机理，提出康复和预防措施以供参考。  相似文献   

Sports injuries in an America's Cup yachting crew: A 4-year epidemiological study covering the 2007 challenge     

Michał Hadała  Carlos Barrios 《Journal of sports sciences》2013,31(7):711-717

Abstract

The aim of this study was to describe the injuries sustained by an America's Cup crew during eight preparatory competitions of the 32nd America's Cup 2007 and the Louis Vuitton Cup (from October 2004 to June 2007). The anatomical location, type of injury, and mechanism of injury were recorded. The injuries were categorized based on each sailor's position on the boat according to three intensities of physical demands. The injury rates per sailor and per 1000 h of competition were determined. In total, 90 injuries were registered. The overall incidence was 10 injuries per 1000 competition hours. Overuse injuries accounted for 76.6% of all lesions. The most common anatomical location of injuries was the upper limb (36.6%), followed by the upper dorsal and cervical spine (34.4%). Frequency of injury was related to the sailor's position on the boat, being higher in the group with more demanding activities (grinder, bowman, and mastman). Most injuries (67%) were sustained by this group of sailors. The most common injuries in this group were muscle contractures of the quadratus lumborum (11), trapezius (8), and rhomboid (7). There were eight cases of elbow epicondylitis, four cases of tendinopathy of the supraspinous tendon, and three cases of tendinopathy of the biceps brachii. An America's Cup yachting crew is exposed to a high risk of overuse injuries, especially those sailors whose boat position involves high-intensity activity.  相似文献   

函子范畴的Incidence代数的两个例子          下载免费PDF全文

范馨香  薛蓉华 《福建工程学院学报》2018,(4):372-375

以箭图Q₁,Q₂,Q₃为例,构造有限偏序k范畴Γ₁,Γ₂,考虑Γ₁,Γ₂及函子范畴Γ₁^Γ2诱导的incidence代数的两个例子。  相似文献   

工薪税的经济归宿分析及其借鉴意义     

朱美玉  梁长来 《平原大学学报》2009,(2)

在劳动供给完全无弹性时,工薪税就完全由雇员承担;在劳动供给完全弹性时,工薪税则完全由雇主承担;在劳动供给富有弹性和缺乏弹性时,工薪税由雇主与雇员分担,且分担比例是供给弹性与未征税时劳动需求曲线的需求弹性之比值。  相似文献   

三棱镜的应用及相应的参数选择   总被引：1，自引：0，他引：1  

杨丽君  安程辉 《保定师专学报》2002,15(4):10-12

根据三棱镜的不同应用目的,通过定量分析给出了其顶角、入射角等参数的最佳选择。  相似文献   

上海交通运输结构的灰色关联分析     

程祖德 《上海海事大学学报》1992,(2)

本文运用灰色系统理论中的关联分析法,建立了上海地区各种运输方式效果与社会经济主要指标之间的关联矩阵,并对发展上海交通运输的各种主要因素进行了初步分析。  相似文献   

基于古林灰色证据理论的农业产值因素分析研究   总被引：2，自引：0，他引：2  

朱春江  唐德善 《软科学》2006,20(4):16-18

用古林法(A.J.K lee)、灰色关联分析(G rey Inc idence)和D-S证据理论相结合而成的AJKG IDS模型,对山东枣庄市农业产值因素进行分析。基本思路是先运用古林法和灰色关联分析法分别得出产值因素权重;再以产值因素为D-S作为辨识框架,以两种分析方法结果输出为基本可信度分配函数,使用D-S理论将信息进行融合,克服单一方法确定权重所存在的片面性,使农业产值因素评价更科学。  相似文献   

An examination of trends in child sexual abuse investigations in Ontario over time     

《Child abuse & neglect》2019

BackgroundChild sexual abuse (CSA) rates have been declining since the 1990s (Dunne et al., 2003; Finkelhor & Jones, 2004, 2012; Jones et al., 2001). Discrepancies in contexts and measures complicate comparing CSA rates across jurisdictions and studies, and there is limited literature about trends in CSA in Canada.ObjectiveUsing data from the Ontario Incidence Study of Reported Child Abuse and Neglect (OIS), the only source of provincially aggregated data in Ontario, Canada, that describes child welfare investigations, this paper provides information on reported and investigated CSA over the past 20 years.Participants and settingThe OIS uses a file review methodology; information is collected directly from investigating child welfare workers.MethodsA sample of child welfare agencies is selected for the study, and data are collected over a three-month period. Weights are applied to produce annual provincial estimates.ResultsThe rates of investigated CSA in Ontario decreased between 1993 and 2013, from 5.20 (95% CI [3.94, 6.47]) to 1.81 (95% CI [0.97, 2.66]) children per 1000. During this time, the rate of all child maltreatment-related investigations doubled, from 21.41 (95% CI [18.38, 24.42]) to 53.32 ([29.61, 77.03]) children per 1000.ConclusionsUnlike other forms of child maltreatment, the incidence of investigated CSA in Ontario declined since 1993. Substantiation rates for CSA investigations decreased more dramatically than the rate of all CSA investigations, which could indicate a true decline in rate or an inability to accurately identify cases of CSA.  相似文献