平面定机拍摄中镜头畸变对动作技术分析结果的影响及修正

目的:针对平面定机拍摄中存在的边缘镜头畸变现象,提出一种快速、易操作的修正方法。研究对象与方法:对固定标志物和实际比赛视频分别进行了实验验证和实例检验。结果:三种被测镜头在图像边缘处的畸变误差百分比为2.75%—4%;对比赛现场拍摄的运动图像进行处理后,解析点在图像边缘运动速度前后差值百分比分别为5.9%和8.18%。结论:利用Lensdoc插件可以快速有效地对镜头畸变进行修正。     

Optimized versus corrected peak power during friction-braked cycle ergometry in males and females

Abstract

The aim of this study was to compare optimization and correction procedures for the determination of peak power output during friction-loaded cycle ergometry. Ten male and 10 female sports students each performed five 10-s sprints from a stationary start on a Monark 864 basket-loaded ergometer. Resistive loads of 5.0, 6.5, 8.0, 9.5, and 11.0% body weight were administered in a counterbalanced order, with a recovery period of 10 min between sprints. Peak power was greater and occurred earlier, with less work having been done before the attainment of peak power, when the data were corrected to account for the inertial and frictional characteristics of the ergometer. Corrected peak power was independent of resistive load (P > 0.05), whereas uncorrected peak power varied as a quadratic function of load (P < 0.001). For males and females, optimized peak power (971 ± 122 and 668 ± 37 W) was lower (P < 0.01) than either the highest (1074 ± 111 and 754 ± 56 W respectively) or the mean (1007 ± 125 and 701 ± 45 W respectively) of the five values for corrected peak power. Optimized and mean corrected peak power were highly correlated both in males (r = 0.97, P < 0.001) and females (r = 0.96, P < 0.001). The difference between optimized and mean corrected peak power was 37 ± 30 W in males and 33 ± 14 W in females, of which approximately 15 W was due to the correction for frictional losses. We conclude that corrected peak power is independent of resistive load in males and females.     

对"社区矫正"的理解和相关思考

从世界范围看,行刑社会化已成为行刑领域的一个趋势,其深度与广度已成为衡量一个国家文明程度的重要标志之一,我国目前正在进行社区矫正的有益探索.笔者首先阐述了对"社区矫正"的理解,其次从实际行刑的角度谈了此项改革的必要性和"社区矫正"制度运行中一些问题的粗浅思考.     

基于协整理论的河南省城乡居民收入与消费实证分析

根据1980—2014年统计数据,利用协整理论和误差修正模型,对河南省城乡居民收入和消费之间的协整关系进行实证分析,结果表明,河南省城乡居民收入与消费间均存在协整关系,并且在长期中城乡居民收入波动对消费支出的影响程度大于短期影响。     

高职高专英语作文分级评阅的实践研究

高职高专公共英语作文评阅的实践表明,对不同写作水平学生的作文实施分级评阅,可以改进和提高他们的英语写作水平。通过分析在实践中实施的分级评阅的实验结果,对公共英语作文的现状提出了值得思考的问题。     

社区文化：社区矫正的门槛与酵母

犯罪引发于文化冲突，终结于文化调适。社区文化既是实施社区矫正的门槛，又是促使犯罪人由犯罪人格向社会人格回归的酵母。社区矫正应从文化接纳入手。加强宣传和引导，促进人们树立“以人为本”的刑罚理念，加强相应的组织文化和制度文化建设，提倡人文关怀，为服刑人员设计共性与个性相兼顾的行为规范，整合构建开放、和谐、互动的动态文化环境，促进社区矫正工作的顺利、有效开展。     

单相有源AC-DC变换器的统一算法及其应用

1Introduction DuetotheextensiveuseofPWMconverters,elec tricpowerlinesareincreasinglycontaminated.This hascausedmanywidelyrecognizedproblems,leading toseveralelectricregulations[1,2].Itisnoteworthythat inhomeappliances,withincreasingconcernsofenergy savingandreducingoperationloss,manyinverter techniqueshavebeendevelopedandadoptedinpro ductssuchasair conditioners,washingmachinesand refrigerators.Despitetheenergysavingmeritofthe invertersystems,thesesystemshavecriticalproblems ofincreasedpowerf…     

《敦煌石室地志残卷考释》匡补(一)

本对王仲荦先生《郭煌石室地志残卷考释》的校释作了部分订补。     

流动注射荧光熄灭分析法测定碘离子

研究发现，在pH=6．0～11的磷酸盐缓冲溶液中，碘离子对荧光素汞的荧光具有熄灭作用，据此．结合流动注射技术，建立了碘离子的流动注射荧光分析方法，碘离子在0．10～4．0μg/L质量浓度范围内具有良好的线性关系，检测下限为75μg/L，该方法用于海带中碘含量的测定，具有操作简单快捷、灵敏度高、选择性好的特点。     

依法治国与劳动教养制度的改革

劳动教养制度不适应依法治国基本方略的要求,不仅存在明显的宪法性根据问题,而且有关劳动教养制度的法规之间或者其他规范性文件之间,都存在明显的矛盾和冲突。因此,改革劳动教养制度势在必行。