十字万向节从动轴转速变化的计算机仿真

本文叙述了车辆十字万向节从动轴转速变化的计算机仿真方法,可供车辆设计时参考应用。     

浅析散手运动中的速度

良好的身体素质是从事体育运动,创造佳绩的重要条件,不同的运动项目对运动员专项身体素质有着不同的要求,能否抓住项目所需的专项素质并发现其多种的表现形式（ 如本文所分析速度在散手运动中特殊的表现形式） ,采取有针对性的训练,成为发展运动员专项素质,提高运动水平的关键。     

基于SVPWM的无速度传感器矢量控制的研究

通过介绍空间电压矢量脉宽调制(SVPWM)控制策略在无速度传感器矢量控制系统中的实现,在此基础上给出了基于DSP的全数字化调速系统,并分别建立了改进的电压型转子磁链观测模型和PI自适应速度估算模型。实验结果表明:所采用的控制方法正确可行,控制系统具有良好的性能。     

96单片机实现的直流电机H型PWM调速控制器设计与实现

本文详细介绍了调速控制系统的工作原理、接口电路、PWM驱动接口电路和相应的控制软件设计。所设计的整个调速控制器具有结构简单、驱动能力强、功耗低的特点。     

如何提高初学者跳远助跑的准确性

对如何提高跳远助跑的准确性进行分析研究，证明提高跳远助跑准确性的练习方法，分析解决了提高跳远助跑准确性的几个问题，特别是在跳远运动实践中，速度训练效果如何转化为提高跳远助跑准确性进行了详细的理论分析，认识到跳远教学和训练中如何提高助跑的准确性。     

中长跑运动员速度感的研究

本文通过对40名中长跑运动员速度感测试,结果显示中长跑运动员速度感主要是依靠对动作频率的辨别能力,同时发现中跑运动员与长跑运动员的提速方式不同,并指出速度感是能够培养的。     

大学英语阅读能力的培养

英语教学侧重培养学生的阅读能力,而阅读教学是培养学生阅读能力的主要途径。本文通过对英语阅读能力的分析及阅读教学中普遍存在的误区的剖析,详述语篇教学以及怎样实施语篇教学的步骤。在此基础上,阐述了提高阅读速度的方法和培养阅读能力的技巧。     

Dynamic balancing of dual-rotor system with very little rotating speed difference

ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｙｐｉｃａｌｒｏｔａｔｉｎｇｍａｃｈｉｎｅｓ,ｓｕｃｈａｓｊｅｔｅｎ ｇｉｎｅｓ,ｇａｓｔｕｒｂｉｎｅｓ,ｌａｔｈｅｓ,ｃｅｎｔｒｉｆｕｇｅｓａｎｄｏｔｈ ｅｒｈｉｇｈｓｐｅｅｄｒｏｔａｔｉｎｇｍａｃｈｉｎｅｓ,ｏｎｅｗａｙｔｏｄｅ     

Chronemics in Instructor–Student E-Mail Communication: An Experimental Examination of Student Evaluations of Instructor Response Speeds

Text-based computer-mediated communication (e.g., e-mail) lacks nonverbal cues afforded by traditional face-to-face interaction in the classroom. A lack of cues may cause students to place increased importance on elements that are still present, such as how long it takes an instructor to respond to a message. This study experimentally explored how instructor e-mail response speed and message content interact to influence student perceptions of instructor interpersonal attraction and credibility. Results (N = 385) suggested that the quicker an instructor responds to a student e-mail message, the more positively s/he is evaluated in terms of social attractiveness, task attractiveness, competence, character, and caring. However, the content of the message did not significantly influence student perceptions of the instructor. These findings offer practical implications for instructor e-mail communication in the classroom and extend what is known about chronemics in computer-mediated communication to the instructional setting.     

Rapidly Recognizing Relationships: Observing Speed Dating in the South

In today's fast-paced society, speed dating is becoming prevalent as a method of meeting potential partners for an intimate interpersonal relationship. At each event, participants can meet at least 6 potential partners, and quickly determine whether there is a connection that may lead to additional meetings. Through observations of the speed dates, 2 primary themes were established. Participants unconsciously progress through 3 phases of Berger and Calabrese's Uncertainty Reduction Theory gauging compatibility. Second, female participants passively assess the potential relationship, as males tend to dominate the situation. Through further observation and study, researchers can validate these “thin slices” as an effective method of meeting potential partners and developing intimate relationships.