广西大学生创业环境现状与对策研究

自主创业是时代的潮流,是大学毕业生就业的重要途径之一。但我国的创业环境不够理想,不利于大学毕业生的自主创业。本文着重对广西的大学毕业生自主创业的现状进行分析,提出了促进广西大学生自主创业的对策。     

北京奥运会抓台式与蹲踞式出发反应时的比较

通过文献资料、观察法、数理统计等研究方法,对北京奥运会游泳比赛中运动员采用蹲踞式和抓台式出发反应时进行统计与分析。结果表明：蹲踞式出发技术具有较好的稳定性、起动速度更快和发力效果好,比抓台式出发技术的反应时短,具有显著性差异,成为主流出发技术;建议：在各层次运动队的训练中广泛推广。     

The categorisation of swimming start performance with reference to force generation on the main block and footrest components of the Omega OSB11 start blocks

Abstract

Work presented in this paper provides a methodology for categorising swimming start performance based on peak force production on the main block and footrest components of the Omega OSB11 starting block. A total of 46 elite British swimmers were tested, producing over 1000 start trials. Overwater cameras were synchronised to a specifically designed start block that allowed the measurement of force production via two sets of four, tri-axis, force transducers; one set in the main block and one in the footrest. Data were then analysed, segregating trials for gender. Each start was categorised, with respect to the peak force production in horizontal and vertical components, into one of nine categories. Three performance indicators, i.e. block time, take-off velocity and distance of entry, were used to assess whether differences in performance could be correlated with these categories. Results from these data suggest that swimmers generating higher than average peak forces were more likely to produce a better overall start performance than those who produced forces lower than the average, for this population of athletes.     

Construction for neutrino experiment starts at Daya Bay

The ground-breaking ceremony for the Daya Reactor Neutrino Experiment,China's largest single project of international collaboration in basic science as well as the biggest one between US and China,was held at Daya Bay Nuclear Power Base in Shenzhen on 13 October,2007. Chaired by CHEN Hesheng, director of the CAS Institute of High Energy Physics(IHEP),the ceremony was attended by high-     

对成人高等教育学生实施创业教育的思考

随着高等教育大众化和社会劳动就业制度的变化,成人教育学生同样面临就业难的问题,有必要在成人高等教育学生中实施创业教育来解决就业问题。本文从分析当前成人教育学生面临的就业形势入手,指出成人高等教育在人才培养和就业工作中存在的问题,提出实施成人高等教育学生创业教育的措施。     

大容量电机起动电压质量控制方式研究

大容量交流异步电动机(9300kW)直接起动时能产生很大的冲击电流,导致线路电压明显下降。尤其是处于长线路末端的大容量电机,因线路压降大,电机起动时对线路电压的影响更为明显,从而其他用户负载的正常运作,产生的高次谐波甚至会危及电网安全。为控制线路电压质量,一般运用软启动装置实现大电机的起动。以大容量电机(9300kW)实例计算作电机起动时的电压控制方式简要分析研究。     

晚清湖北实业教育兴起原因初探

19世纪末，伴随着传统教育在近代的渐趋衰落，实业教育在湖北兴起。实业被认为是立国的要素。晚清湖北实业教育的兴起，受晚清中国传统教育的不合事宜、外国资本主义的刺激和本地兴建实业掀起高潮三方面的影响，是中外合力共同作用的结果。     

A nationwide survey starts on lacustrine resources

As a key component of the national initiative for basic S＆T data and infrastructure development, a nationwide survey on the lake water quality, volume and bio-resources has recently been kicked off. The move marks the systematic implementation of the secondround investigation of the country＇s lacustrine resources.     

大学生创业教育中的心理素质教育探析

当今高等教育实际上是创业教育，培养良好的心理素质是创业教育的前提和关键，创业教育应从理论和实践的途径，注重大学生心理健康与心理调试能力的培养。     

A Biomechanical Analysis of Four Sprint Start Positions

Abstract

The sprint starts of 12 skilled collegiate sprinter!hurdlers were filmed for four different sprint start conditions. Ground reaction forces were collected for the first step out of the blocks and velocities through a 2-m speed trap immediately following the first support phase were recorded. The subjects employed their preferred right-left leg placement in the blocks, while the anterior–posterior spacing of the front block with respect to the starting line and the amount of forward lean in the set position were varied. Four positions were constructed that accounted for anthropometric differences. The four positions consisted of combinations of two arm orientations (forward lean and perpendicular to ground) and two front block to starting line distances (bunched and elongated). Kinematic data were reduced to provide center of mass position and velocity measures and analyzed for critical periods throughout the starting action. Selected critical events from the first step kinetic records were also analyzed. The results indicated that the elongated starting positions resulted in greater horizontal displacement, greater propelling impulse, increased first step toe-off velocity, and greater average velocity through a 2-m speed trap. Arm orientation effects were less well defined. Forward lean tended to result in greater vertical velocity at block clearance and horizontal velocity at first step toe-off, whereas perpendicular arm positioning resulted in greater 2-m speed trap velocity.