竞走项目最大速度能力和足底压力特征研究

通过二维录像解析和足底压力分布实验测试,对竞走项目运动员最大速度能力和足底压力分布特征进行相关的基础研究,以获得竞走项目运动员在特定的技术规则规定下,世界级优秀竞走运动员的极限最大速度能力、关键运动学参数和足底压力分布特征参数情况,并对这些运动学和动力学参数进行了相关分析.     

运用信息网络化技术构建高校《国家学生体质健康标准》测试评价系统研究

在调研其他高校的基础上,结合学校的贯彻实施,研究<国家学生体质健康标准>测试评价系统的环节、流程,提出运用信息网络化技术构建<国家学生体质健康标准>测试评价系统技术平台的设想并进行实践.为高校今后的<国家学生体质健康标准>实施提供理论与实践参考.     

Superior short-term learning effect of visual and sensory organisation ability when sensory information is unreliable in adolescent rhythmic gymnasts

Rhythmic gymnasts specialise in dynamic balance under sensory conditions of numerous somatosensory, visual, and vestibular stimulations. This study investigated whether adolescent rhythmic gymnasts are superior to peers in Sensory Organisation test (SOT) performance, which quantifies the ability to maintain standing balance in six sensory conditions, and explored whether they plateaued faster during familiarisation with the SOT. Three and six sessions of SOTs were administered to 15 female rhythmic gymnasts (15.0 ± 1.8 years) and matched peers (15.1 ± 2.1 years), respectively. The gymnasts were superior to their peers in terms of fitness measures, and their performance was better in the SOT equilibrium score when visual information was unreliable. The SOT learning effects were shown in more challenging sensory conditions between Sessions 1 and 2 and were equivalent in both groups; however, over time, the gymnasts gained marginally significant better visual ability and relied less on visual sense when unreliable. In conclusion, adolescent rhythmic gymnasts have generally the same sensory organisation ability and learning rates as their peers. However, when visual information is unreliable, they have superior sensory organisation ability and learn faster to rely less on visual sense.     

Circadian rhythm effect on physical tennis performance in trained male players

To determine the effect of circadian rhythm on neuromuscular responses and kinematics related to physical tennis performance, after a standardised warm-up, 13 highly competitive male tennis players were tested twice for serve velocity/accuracy (SVA), countermovement vertical jump (CMJ), isometric handgrip strength (IS), agility T-test (AGIL) and a 10-m sprint (10-m RUN). In a randomised, counter-balance order, tennis players underwent the test battery twice, either in the morning (i.e., AM; 9:00 h) and in the afternoon (i.e., PM; 16:30 h). Paired t-tests were used to analyse differences due to time-of-day in performance variables. Comparison of morning versus afternoon testing revealed that SVA (168.5 ± 6.5 vs. 175.2 ± 6.1 km · h^?1; P = 0.003; effect size [ES] = 1.07), CMJ (32.2 ± 0.9 vs. 33.7 ± 1.1 cm; P = 0.018; ES = 1.46), AGIL (10.14 ± 0.1 vs. 9.91 ± 0.2 s; P = 0.007; ES = 1.23) and 10-m RUN time (1.74 ± 0.1 vs. 1.69 ± 0.1 s; P = 0.021; ES = 0.67) were significantly blunted during the morning testing. However, IS was not affected by time-of-day (P = 0.891). Thus, tennis performance may be reduced when competing in the morning in comparison to early evening. Therefore, coaches and tennis players should focus on schedule the SVA, power, speed and agility training sessions in the afternoon.     

A multilevel approach for the damage assessment of Historic masonry towers

In the paper some case studies of damaged towers in Italy are presented: the Tower Masserano of Palace Ferrero - La Marmora at Biella, the bell tower of the Collegiata of San Vittore at Arcisate, and three medieval towers in Alba. A methodology is put forward for combining laboratory and nondestructive testing methods with monitoring systems in order to reach the goal of evaluating the state of conservation of historic towers and its evolution in time.     

一个带协变量调整多响应比较的高效方法及其在基因组数据中的应用

目前在文献中有很多关于多响应比较的研究方法,但是对带协变量调整的非参数检验的研究较少。一种直观的想法是将数据先投影到协变量的正交空间中,然后再利用秩和检验、调整的秩和检验或最大值检验方法。但是,功效普遍不高。在调整的秩和检验和伪F检验两种方法基础上,构建MIN2检验。大量模拟和实际数据表明,MIN2检验的效果优于现有的非参数检验方法。     

铝基复合材料烧结试验中试样制备及试验方法研究

铝基复合材料烧结试验所用试样的制备方法采用常用的粉末冶金法,它的制备方法包括粉末预处理,配料,混料,冷压成形,制样等.但每一个工序都与传统的粉末冶金法有所不同,具有其独特性.原位观察法进行烧结试验也为课题组独创.这些研究为铝基复合材料烧结工艺研究提供了试验依据.     

双向认证的密码协议及其形式分析与应用

在安全数据通信中,身份认证和会话密钥的协商是极为重要的问题,近年来,实现这种类型的密码协议主要是通过可信第三方参与身份的认证和会话密钥的协商,因而,可信第三方的可靠性和安全性是系统性能的瓶颈。提出了一个双向的认证密码协议,解决了可信第三方的性能瓶颈问题,是一个更为有效的、安全的密码协议。用串空间的认证测试理论对其进行了形式分析,最后探讨了它在TLS协议中的应用。     

英语应用能力等级考试对高职高专英语教学的反拨作用

英语测试是教师了解学生个体发展和教学反馈的重要手段。本文通过对高职高专英语应用能力B级考试测试题型的分析,归纳、总结了试卷的特点和重点,指出其对高职高专英语教学的教材、课堂教学模式,课程结构等几个方面所具有的反拨作用。     

普通话机测中“说话”项的测评分析及教学培训

随着计算机辅助普通话测试的实施和推广,＂说话＂项的测试增加了相应的难度,也出现了一些新情况、新问题。文章对机测＂说话＂项进行了测评状况的调查分析,并对机测方式下的＂说话＂教学培训提出了应对措施。