赛艇运动的项目特性及训练指导思想   总被引：13，自引：4，他引：9  

周学军 《湖北体育科技》2001,20(3):35-36

通过对赛艇运动项目决定成绩的因素,如供能系统、专项素质、生理特性的分析,确定了赛艇运动的特性及规律,并据此特性科学地提出了该项目的训练指导思想.  相似文献   

Effects of light refraction on the accuracy of camera calibration and reconstruction in underwater motion analysis   总被引：1，自引：0，他引：1  

Kwon YH  Casebolt JB 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(2):315-340

One of the most serious obstacles to accurate quantification of the underwater motion of a swimmer's body is image deformation caused by refraction. Refraction occurs at the water-air interface plane (glass) owing to the density difference. Camera calibration-reconstruction algorithms commonly used in aquatic research do not have the capability to correct this refraction-induced nonlinear image deformation and produce large reconstruction errors. The aim of this paper is to provide a thorough review of: the nature of the refraction-induced image deformation and its behaviour in underwater object-space plane reconstruction; the intrinsic shortcomings of the Direct Linear Transformation (DLT) method in underwater motion analysis; experimental conditions that interact with refraction; and alternative algorithms and strategies that can be used to improve the calibration-reconstruction accuracy. Although it is impossible to remove the refraction error completely in conventional camera calibration-reconstruction methods, it is possible to improve the accuracy to some extent by manipulating experimental conditions or calibration frame characteristics. Alternative algorithms, such as the localized DLT and the double-plane method are also available for error reduction. The ultimate solution for the refraction problem is to develop underwater camera calibration and reconstruction algorithms that have the capability to correct refraction.  相似文献   

对奥运会及我国大型运动会发行体育彩票融资的研究   总被引：1，自引：0，他引：1  

王相飞  赵鸽燕 《湖北体育科技》2001,20(3):10-11,14

当代大型运动会明显表现出对资金的高需求,但是目前各国中央政府的财政收入不足是各国政府共同面临的普遍问题,这将严重影响政府对大型运动会的投入,而发行体育彩票正是解决这一问题的主要手段之一.笔者就奥运会发行体育彩票的情况和我国举办大型运动会发行体育彩票的情况及存在问题作一论述,并对我国大型运动会通过发行体育彩票的融资提出建议.  相似文献   

Educational and Employment Testing: Changing Concepts in Measurement and Policy     

Wayne J. Camara  Dianne C. Brown 《Educational Measurement》1995,14(1):5-11

How will the expansion of the concept of construct validity affect validation practice in employment testing? How does the need for consequential validity differ in educational and employment testing? How do the research bases differ for performance assessment in these settings? Are there parallel trends in policies for test use in education and industry?  相似文献   

The medical library and the medical student     

Long EC  Miller PG 《Bulletin of the Medical Library Association》1989,77(1):60

  相似文献   

ADONIS—latest developments and its role in the changing publisher/library relationship     

HENK C. J. COMPIER  ROBERT M. CAMPBELL  B. V. ADONIS 《Health information and libraries journal》1992,9(1):3-13

Fifth international congress on medical librarianship, Tokyo, Japan sept. 30-oct. 4, 1985     

Self PC 《Bulletin of the Medical Library Association》1986,74(3):265-266

  相似文献   

Copyright: where are we now?     

PAMELA C. STEWART 《Health information and libraries journal》1986,3(3):153-159

The first English printing of Galen: the formation of the company of barber-surgeons     

Erler MC 《The Huntington Library quarterly》1985,48(2):159-171

  相似文献   

Journals as a support to health management in Europe: an initial approach to a ‘core list’     

M. C. THURIAUX  P. WEISS  C. M. PERRY  A. S. VALCHEV 《Health information and libraries journal》1987,4(2):75-79