几种减振杆对弓箭系统的减振效果测试研究   总被引：1，自引：0，他引：1  

邬建卫  杨蕾 《成都体育学院学报》2007,33(2):100-103

采用工程学的电测试技术,对运动员进行实测,测量从拉弓钩弦到箭射出收势过程中弓箭系统振动响应的各项特征参数值,讨论使用何种减振杆以及减振杆的安装位置如何达到最佳减振效果,为运动员和教练员在训练和比赛中合理的选择、调节相适应的减振装置提供参考.  相似文献   

流动人口的边缘性与村治秩序的震荡--以鄂西灵村为例     

吴淼  李巧兰 《华中师范大学学报(人文社会科学版)》2000,39(2):12-17

本文通过对个案村的描述与分析,指出贫困山区的流动人口在挣脱土地和乡土规则的束缚之后,并未融入新的生活秩序之中,反而在异地处于边缘性的境地.这种无序的经历内化在他们的思想和行为中,铸建成反秩序的行为"规则”.当他们回流后,这种"规则”进入乡村,冲击原有的规则体系.而目前的村级治理对此束手无策,从而导致村治秩序的震荡.笔者最后指出,只有将外出务工带来的利益期望内部化,将人口流动制度化、规范化,才能实现村治秩序的重构.  相似文献   

在制造视觉震撼与洞察市场需求中寻找契合点     

徐思 《西安欧亚学院学报》2008,6(3)

广告承担着向受众传递广告信息的任务,品牌的理念、经营的思路通过广告向受众展示出来。在广告策划中,要把较强的视觉冲击力与主旨清晰、诉求明确的画面语言支撑相融合,才能事半功倍;要把目标消费人群确定为工作的中心及出发点,因人而异,有针对性地实施广告作品的策划、设计及投放。  相似文献   

降雨衰减及去极化效应     

李平舟  车骏  杨帆 《环球赛鸽科技》2015,(3)

研究了降雨引起的衰减与去极化效应,根据ITU-R提出的雨衰减预报模型,计算了我国某些城市的地空雨衰减量。将离散雨介质视为一随机系统,利用系统辨识的方法,利用系统辨识的方法,结合某市实验数据得到了一个去极化分辨率的序列模型。  相似文献   

A Brief Study on Culture Shock over Overseas Students and the Solution to New Cultural Environments     

张维 《海外英语》2014,(23)

Culture shock is one of the common experiences by students and people abroad. They may experience the feeling of anxiety, disorientation, confusion, and even hostility because of misunderstanding to each other."Culture shock"refers to the phenomenon in which people engage in the interaction feel depressed, discomfortable, etc. Culture shock may be caused by the conflict of various value systems when students and people enter a new culture and other value system. Culture shock is also a consequence of the influence of the negative life event. The changes in one's life and lack of support from family members,friends will make them more vulnerable and cause great discomfort in the new environment.  相似文献   

Pre-service teachers’ motivation,sense of teaching efficacy,and expectation of reality shock     

Hyunjin Kim  YoonJung Cho 《Asia-Pacific Journal of Teacher Education》2014,42(1):67-81

The present study investigated how pre-service teachers’ motivation and their sense of teaching efficacy influence their expectation about reality shock during the first year of professional teaching. A total of 533 pre-service teachers at a state university in the US Midwest participated in this study. The results showed that the pre-service teachers’ expectation of reality shock was negatively related to teacher efficacy and intrinsic motivation while it was positively related to introjected and external motivation. The results of a hierarchical regression analysis revealed that pre-service teachers’ sense of efficacy and introjected motivation were strong predictors of their expectation of reality shock, when gender difference was controlled for. There was an interaction effect between intrinsic motivation and teachers’ sense of efficacy in predicting the reality shock expectation. We discussed the educational implications for future research in an endeavour to reduce the reality shock among novice teachers.  相似文献   

The relationship between cultural intelligence and performance with the mediating effect of culture shock: A case from Philippine laborers in Taiwan     

Angela Shin-yih Chen  Yi-chun Lin  Airin Sawangpattanakul   《Int J Intercult Relat》2011,35(2):246-258

This purpose of the present study was to explore the role of cultural intelligence (CQ) and its effect on performance of foreign laborers. We also examined the mediating effect of culture shock on the relationship between CQ and performance. Data were collected from Philippine laborers working in Taiwan. A paper-based survey, with a return rate of 76.4%, was completed by 382 Philippine laborers working in Taiwan's manufacturing industries. The results showed that CQ was positively related to the performance of Philippine laborers and negatively related to culture shock. In addition, we found that culture shock partly mediated the relationship of CQ and performance. These findings suggested that CQ can serve as a predictor for cross-cultural effectiveness. Implications for practice and direction for future research are offered.  相似文献   

陈式太极拳金刚捣碓动作足底压力分析     

贾金钢  姜华北  马振水 《河北体育学院学报》2011,25(3):92-96

运用文献资料法和实验法,对练习陈式太极拳的三名受试者金刚捣碓动作进行足底压力分析,以揭示陈式太极拳金刚捣碓动作足底压力的变化规律。结果表明,在金刚捣碓动作中左足的足后区、足中区外侧的压力载荷显著大于其他部位;右足的足后区内侧、足中区内侧和第4、5砣骨区显著大于其他部位。在金刚捣碓震脚时,左足主要集中在足后区和足前区外侧,右足主要集中在足后区和足前区内侧。建议在练习陈式太极拳时,加强对足底各部位小肌肉群和踝关节的训练,尤其是足跟区和第一砣骨关节部位,以免运动损伤。  相似文献   

预热休克对大鼠骨骼肌运动性损伤的保护作用     

叶春  罗晶  许豪文  何执静 《体育科学》2005,25(9):53-55,82

实验旨在观察预热休克对一次性大负荷运动造成大鼠骨骼肌运动性损伤是否具有保护作用。实验采用大鼠热休克模型,用物理加热方法使大鼠体温升高到40.5℃~41.5℃,持续10~15min,在室温下恢复24h后进行一次性大负荷运动(速度为27m/min,坡度0°,时间为90min)。通过对比预热和室温组大鼠运动后即刻、24h、48h血清中的肌酸激酶(CK)、乳酸脱氢酶(LDH),来确定预热休克对大鼠运动所致骨骼肌损伤是否具有保护作用,以及是否能够加速骨骼肌运动性损伤的恢复。结果发现,预热组运动后即刻、24h,血清中激酶和乳酸脱氢酶活性均比室温组低(P<0.05);运动后48h,预热组较室温组血清中肌酸激酶和乳酸脱氢酶活性略低,没有显著性差异,两组肌酸激酶值比室温基础组略高,也没有显著性差异;预热运动后48h组乳酸脱氢酶与室温基础组相比略高,没有显著性差异;室温运动后48h组乳酸脱氢酶较室温基础组明显偏高,具有显著性差异(P<0.05)。提示,预热休克对于一次性大负荷运动所致的大鼠骨骼肌运动性损伤具有保护作用,并且能够促进骨骼肌运动性损伤的恢复。  相似文献   

Hypertonic saline resuscitation reduces apoptosis of intestinal mucosa in a rat model of hemorrhagic shock   总被引：1，自引：0，他引：1  

Lu YQ  Huang WD  Cai XJ  Gu LH  Mou HZ 《Journal of Zhejiang University. Science. B》2008,9(11):879-884

Objective: To investigate the early effects of hypertonic and isotonic saline solutions on apoptosis of intestinal mueosa in rats with hemorrhagic shock. Methods: A model of rat with severe hemorrhagic shock was established in 21 Spragne-Dawley (SD) rats. The rats were randomly divided into the sham group, normal saline resuscitation (NS) group, and hypertonic saline resuscitation (HTS) group, with 7 in each group. We detected and compared the apoptosis in small intestinal mucosa of rats after hemorrhagic shock and resuscitation by terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL), FITC (fluo-rescein-iso-tbiocyanate)-Annexin V/PI (propidium iodide) double staining method, and flow cytometry. Results: In the early stage of hemorrhagic shock and resuscitation, marked apoptosis of small intestinal mucosa in the rats of both NS and HTS groups was observed. The numbers of apoptotic cells in these two groups were significantly greater than that in the sham group (P＜0.01). In the HTS group, the apoptic cells significantly decreased, compared with the NS group (P＜0.01). Conclusion: In this rat model of severe hemorrhagic shock, the HTS resuscitation of small volume is more effective than the NS resuscitation in reducing apoptosis of intestinal mucosa in rats, which may improve the prognosis of trauma.  相似文献