学前教育专业钢琴技能教育思考

本文在总结学前教育专业实际钢琴技能课教学的基础上,通过对钢琴技能课的教学反思,从提高对钢琴技能课学习的认识,加强学前教育专业钢琴技能学习的角度出发,提倡立足传统教学,勇于教学创新,开拓思路,探索灵活多样的授课形式,整合教学资源,研究新教材、探索新教法,立足于学前教育的专业特点,注重学前教育专业键盘技能的实际运用,并建立科学、可行的学前专业技能考核标准,从而促进学前专业音乐技能课的发展。     

Adaptive control of track tension estimation using radial basis function neural network

Track tension is a major factor influencing the reliability of a track. In order to reduce the risk of track peel-off, it is necessary to keep track tension constant. However, it is difficult to measure the dynamic tension during off-road operation. Based on the analysis of the relation and external forces depending on free body diagrams of the idler, idler arm, road wheel and road arm, a theoretical estimation model of track tension is built. Comparing estimation results with multibody dynamics simulation results, the rationality of track tension monitor is validated. By the aid of this monitor, a track tension control system is designed, which includes a self-tuning proportional-integral-derivative (PID) controller based on radial basis function neural network, an electro-hydraulic servo system and an idler arm. The tightness of track can be adjusted by turning the idler arm. Simulation results of the vehicle starting process indicate that the controller can reach different expected tensions quickly and accurately. Compared with a traditional PID controller, the proposed controller has a stronger anti-disturbance ability by amending control pa-rameters online.     

装甲车辆火力性能仿真模型可信性与实时性

可信性与实时性是"人在回路"仿真系统研究的核心内容.在仿真过程中,通过对坦克火力系统物理模型分析,兼顾仿真精度与实时性要求,采用与实际武器装备一致的解算方法,拟合出方位角、瞄准角、最大弹道高与测距距离的函数关系,并据此构造出装甲车辆的外弹道曲线.通过对计算机机器时间物理模型的分析,采用读取CPU内部64位时间寄存器EDX:EAX方式,实现了仿真算法的纳秒级实时运算.通过提高可信性与实时性,增强了"虚拟战车"的沉浸感,为装甲武器装备的采办提供了必要的支持.     

加强旅游管理专业实践教学的基本思路

加强学生实践能力培养是高等教育培养模式中一个重要环节,按照新的教育教学思想要求,必须有效地培养旅游管理专业学生的实践能力。本文通过对高校旅游管理专业实施实践教学的现状进行分析,针对存在的问题,提出加强实践教学的合理化建议。目的是通过对学生提供多种实践活动机会,培养学生的实践技能,理论联系实际,提高他们在旅游企业中解决实际问题的能力。     

谈英语教学的语用观

语用知识对学生理解和使用语言有着非常重要的作用。只有具备了一定的语用知识,学生才能准确地使用语言,才能真正学会一门语言。这就要求英语教师在讲解语言知识的同时一定要注重语用知识的传授。     

多媒体网络教学与创新能力的培养

多媒体网络教学是现代教育的一种新颖的教学模式。人的创新能力是社会发展的强大助推力。运用多媒体网络教学,可以有效地培养人的创新能力。本文从与创新能力的四个基本要素入手,论证了多媒体网络教学与创新能力培养之间的关系。     

有限服务能力的损失制排队系统M/M/1分析

提出了随机服务系统的服务能力问题,给出有限服务能力的损失制M／M／1模型的描述和其稳态解,并求出了评价系统运行的几个主要数量指标。     

如何在课程教学中培养学员的素质和能力

如何实施素质教育是教育改革中的重要课题,本文根据教学实际,结合教学过程和教学内容对学员进行学习指导,提出培养学员素质和能力的途径。     

Comparison of rank aggregation methods based on inherent ability

Ranking is a common task for selecting and evaluating alternatives. In the past few decades, combining rankings results from various sources into a consensus ranking has become an increasingly active research topic. In this study, we focus on the evaluation of rank aggregation methods. We first develop an experimental data generation method, which can provide ground truth ranking for alternatives based on their “inherent ability.” This experimental data generation method can generate the required individual synthetic rankings with adjustable accuracy and length. We propose characterizing the effectiveness of rank aggregation methods by calculating the Kendall tau distance between the aggregated ranking and the ground truth ranking. We then compare four classical rank aggregation methods and present some useful findings on the relative performances of the four methods. The results reveal that both the accuracy and length of individual rankings have a remarkable effect on the comparison results between rank aggregation methods. Our methods and results may be helpful to both researchers and decision‐makers.     

淀粉─丙烯酸型保水剂的制备及保水能力研究

以玉米淀粉为原料,在常温下经碱糊化,用ＫＭｎＯ４作引发剂,进行丙烯酸与淀粉接枝共聚。对其聚合条件和接枝共聚物的保水能力进行了研究,为保水剂的开发应用提供依据。