Takahashi定理的推广   总被引：4，自引：0，他引：4  

欧阳崇珍 《江西教育学院学报》2000,21(3):1-2

推广了极小子流形的Takahashi定理。证明了n维伪黎曼流形M到伪欧氏空间的等距映射X：M→Rn^n若满足△X=-fx则X(M)包含在平均曲率Sn(r)^n p-1(r)中。  相似文献   

新疆少数民族学生汉语教学法新探     

成世勋 《伊犁师范学院学报》2004,(4):40-42

对新疆少数民族汉语教学法从改变听、说、读、写等几个方面进行了探讨，旨在从整体上提高我区少数民族学生汉语教学质量，从而适应飞速发展的时代要求。  相似文献   

基础教育英语教师发展模式研究--“出国研修”模式调查与分析     

刘旸 《湖北第二师范学院学报》2014,(11):77-79

“出国研修”是教师发展模式的一种。本文主要通过对有出国研修经历的二十位基础教育英语教师的调查研究,探讨了这种模式对教师发展的重要意义,并且在研究中发现此模式目前存在的一些问题,如选派机制不够完善、评价机制不够完善等等,针对问题笔者提出了建议。  相似文献   

基础教育英语教师发展模式研究--“出国研修”模式调查与分析     

刘旸 《培训与研究》2014,(11)

“出国研修”是教师发展模式的一种。本文主要通过对有出国研修经历的二十位基础教育英语教师的调查研究,探讨了这种模式对教师发展的重要意义,并且在研究中发现此模式目前存在的一些问题,如选派机制不够完善、评价机制不够完善等等,针对问题笔者提出了建议。  相似文献   

Comparative efficacy of active recovery and cold water immersion as post-match recovery interventions in elite youth soccer     

Sam Pooley  Owen Spendiff  Matt Allen 《Journal of sports sciences》2020,38(11-12):1423-1431

ABSTRACT

The current study compared cold-water immersion (CWI) and active recovery (AR) to static stretching (SS) on muscle recovery post-competitive soccer matches in elite youth players (n = 15). In a controlled crossover design, participants played a total of nine competitive soccer games, comprising three 80 minute games for each intervention (SS, CWI and AR). Muscle oedema, creatine kinase (CK), countermovement jump performance (CMJA) and perceived muscle soreness (PMS) were assessed pre-, immediately post-, and 48 hours post-match and compared across time-intervals and between interventions. Following SS, all markers of muscle damage remained significantly elevated (P < 0.05) compared to baseline at 48 hours post-match. Following AR and CWI, CMJA returned to baseline at 48 hours post-match, whilst CK returned to baseline following CWI at 48 hours post-match only. Analysis between recovery interventions revealed a significant improvement in PMS (P < 0.05) at 48 hours post-match when comparing AR and CWI to SS, with no significant differences between AR and CWI observed (P > 0.05). Analysis of %change for CK and CMJA revealed significant improvements for AR and CWI compared to SS. The present study indicated both AR and CWI are beneficial recovery interventions for elite young soccer players following competitive soccer matches, of which were superior to SS.  相似文献   

Effects of virtual reality on creativity performance and perceived immersion: A study of brain waves     

Yen-Yin Wang  Tz-Han Weng  I-Fan Tsai  Jing-Yueh Kao  Yu-Shan Chang 《British journal of educational technology : journal of the Council for Educational Technology》2023,54(2):581-602

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