Hammer acceleration due to thrower and hammer movement patterns

Ground reaction force and wire tensile force were measured during test throws by three hammer throwers: the Asian record holder, who had a personal best of 83.47 m at the time of the investigation, and two university athletes, with personal bests of 59.95 m and 46.30 m respectively. They were filmed using three high-speed video cameras (250 Hz). The displacements of the hammer head and the athletes' centres of mass were calculated using three-dimensional analysis procedures. The Asian record holder's centre of mass and the hammer head on the final two turns exhibited approximate conjunctions of the hammer high point and the thrower's low point and vice versa about the hammer's azimuth angle. It is conjectured that the reason why the thrower's movement is asynchronous with the hammer's movement by approximately half a turn is to accelerate the hammer head in a manner similar to the way that the amplitude of a pendulum increases when it is pulled upward by a string against the downward movement of the swinging weight.     

地源热泵在顺德地区应用的可行性分析

根据顺德地区自然气候环境、土壤温度状况,对多种不同的热泵系统的节能、技术性和经济性参数进行了比较和分析,证明地源热泵具有节能、环保的优点,在顺德地区具有广阔的发展前景.     

学校体育场馆（地）向社会开放的SWOT分析与对策研究

通过对学校体育场馆（地）向社会开放的SWOT（优势、劣势、机遇、威胁）分析,提出了严格规范管理制度、加强安全防护、积极开拓经济来源、处理好教学和开放的关系、政府主导、学校与社区共同参与的对策.     

《山石满足了》的认知文体分析

认知文体学是认知语言学发展的一个新分支。它关注语言形式与其产生的效果之间的关联,分析作者创作与读者阐释的认知机制。认知文体学研究理论框架很多,在此试图从图形背景理论的角度对TedHughes的《山石满足了》(Hill-stone was content)做认知文体学分析,从短语、词汇和语法三个不同层面探讨了图形背景理论的运行机制及其在诗歌意境形成中的作用,同时也分析了此语篇中图形背景互换为表达主题所起的作用,从而为作品的解读提出新的视角。     

土壤源热泵在扬州某五星级酒店中的设计探讨

文章针对节能减排的当前形势,通过对在扬州某建筑中的土壤源热泵经济性及节能性进行的分析,提出了地源热泵使用的可行性。     

UCF Library Express: Marketing a Faculty Delivery Service

As it becomes increasingly difficult to demonstrate the worth of the library to the academic community, gate counts and usage statistics are no longer enough. Showing the impact the library has on the community requires planning new services with outcome measurement from the start. This article outlines a marketing strategy for launching a faculty book delivery service at the University of Central Florida's John C. Hitt Library using Fisher and Pride's (2006) Blueprint for Your Library Marketing Plan. It includes a review of relevant literature on marketing delivery services, service and marketing goals and outcomes, target audiences, marketing messages, message delivery strategies, marketing budget, and management of staff responsibilities. This article is the second in a series of three articles that together make up an entire project planning and management document that is based on Rhea Rubin's (2006) Outcome Measurement model. The plan in its entirety provides an example of how to apply the Outcome Measurement model in an academic library setting.     

实用新型马铃薯收获机

实用新型马铃薯收获机采用"地滚轮"传动装置,成功地解决了动力提取困难、传动路线长、传动结构复杂等问题;新颖的"溜槽螺旋筛"使土、薯分离顺利,有效地解决了马铃薯起收过程中的脱皮、掉皮等技术难题.为马铃薯收获机械的广泛应用展示了良好的前景.     

星载测雨雷达与地基雷达数据的空间匹配分析

对星载雷达数据与地面降雨资料进行空间匹配,并展开定量分析,在理论研究与实际应用中具有重要意义. 详细介绍了美国戈达德航天飞行中心采用的数据匹配方法,进一步采用了更精细的三维网格,对三组星载与地基雷达数据进行了空间匹配处理,并对结果展开了定性比较与点对点的定量对比,比较了2种匹配方法,验证了匹配方法的有效性.     

中共历史上两次飞跃之共同点论析

中共历史上的两次飞跃 ,在缘起、性质、过程特征及历史意义等方面有互通之处。这些共同点昭示人们 ,中国的现代化建设既要立足于客观实际与具体国情 ,解放思想、实事求是 ,坚决反对“左”、右两种倾向 ,又要着眼于解放与发展生产力 ,同时还要有一个成熟的党的中央领导集体与领导核心     

论声乐教学中歌曲演唱的艺术处理

在声乐教学中,不但要进行声音技术同的训练,而且还要进行歌曲演唱的艺术处理,两者互为因果,互为表里。歌曲演唱的艺术处理,应该遵循声情并茂,对比统一,同中求异三个基本原则,这三个原则相互依赖,统一不可。