一阶常微分方程若干求解技巧

一般的一阶常微分方程没有通用的初等解法,变量分离方程和全微分方程是一阶常微分方程中最基本的类型,文章以题为例介绍这两类方程求解过程中变换的技巧和规律.     

基于CDIO工程实践教育的单片机实验课程教学研究与探讨

单片机是一门工程实践性质非常强的课程,长期以来的课堂式教学很难达到该课程的教学目标,为此我们对CDIO工程教育理念进行了研究,并将其引入到单片机课程的实践环节.本文对CDIO的理念进行了介绍,并提出了在这种模式下单片机实验课程以项目驱动方式进行的方案设计,对其中的课程组织,项目单元设计,学习路径规划,团队协作能力培训进行了具体的讨论.     

英语专业听力教学和实践

听力教学是英语专业课程中的基础课之一,在教学中占有很重要的位置。本文探讨了制约学生听力的要素,教师应在听力教学中担任的角色以及一些心得体会。同时,教授学生一些英语听力训练的技巧和方法,使学生具备良好的听力习惯。     

基于多媒体视频的高水平乒乓球运动员技术能力评估

针对乒乓球比赛技术特点和传统评估方法的不足,构建了基于多媒体视频的高水平乒乓球运动员技术能力评估系统.研制了比赛数据采集软件,利用比赛视频采集国内外高水平运动员技术数据,实现了数据采集的连续性和系统性,运用微粒群算法结合神经网络对高水平乒乓球运动员临场技术能力进行评估,模型精确性和收敛性较好,为指导运动员训练和比赛提供了一定的决策参考.     

钢琴演奏中音乐和技术的关系

论述了钢琴演奏中音乐与技术之间的辨证关系。它们之间既有矛盾性，也有统一性；既有从属关系，也存在相互转化。处理好这些关系，可达到正确认识和处理音乐中艺术表演与表演技巧关系的最终目的。     

A comparative evaluation of objective and subjective weather forecasts in the united states

This paper is concerned primarily with the evaluation and comparison of objective and subjective weather forecasts. Operational forecasts of three weather elements are considered: (1) probability forecasts of precipitation occurrence, (2) categorical (i.e. non-probabilistic) forecasts of maximum and minimum temperatures and (3) categorical forecasts of cloud amount. The objective forecasts are prepared by numerical-statistical procedures, whereas the subjective forecasts are based on the judgements of individual forecasters. In formulating the latter, the forecasters consult information from a variety of sources, including the objective forecasts themselves. The precipitation probability forecasts are found to be both reliable and skilful, and evaluation of the temperature/cloud amount forecasts reveals that they are quite accurate/skilful. Comparison of the objective and subjective forecasts of precipitation occurrence indicates that the latter are generally more skilful than the former for shorter lead times (e.g. 12–24 hours), whereas the two types of forecasts are of approximately equal skill for longer lead times (e.g. 36–48 hours). Similar results are obtained for the maximum and minimum temperature forecasts. Objective cloud amount forecasts are more skilful than subjective cloud amount forecasts for all lead times. Examination of trends in performance over the last decade reveals that both types of forecasts for all three elements increased in skill (or accuracy) over the period, with improvements in objective forecasts equalling or exceeding improvements in subjective forecasts. The role and impact of the objective forecasts in the subjective weather forecasting process are discussed in some detail. The need to conduct controlled experiments and other studies of this process, with particular reference to the assimilation of information from different sources, is emphasized. Important characteristics of the forecasting system in meteorology are identified, and they are used to describe similarities and differences between weather forecasting and forecasting in other fields. Acquisition of some of these characteristics may be beneficial to other forecasting systems.     

学生田径技术成绩综合评定初探

本文运用了二阶模糊综合评分模型对学生的田径技术成绩进行了综合评判,以模糊定量形式给学生掌握标枪投掷技术水平的高低评判提供了客观标准,较好地解决了长期以来不能很好解决的由定性评定转化为定量分值的问题。     

抢篮板球的技术、配合及训练探讨

运用理论分析的方法,阐述队员冲抢篮板球的重要作用.技术是冲抢篮板球能力的核心;配合是冲抢篮板球能力的保障;基本功训练是冲抢篮板球能力的重要基础.     

论制约大学英语教学效果的非教学因素

本文着重分析了多年来影响英语教学效果的三个主要因素:首先由于近年来大学生扩招,学习风气有所下降;其次学校硬件设施如语音室、多媒体建设投入太少;最后教师的素质,尤其是科研能力、知识结构和英语技能与现实要求有一定差距。作者认为要使大学英语教学效果上一个新的台阶,必须切实解决好这三方面的问题,教、学、管三方齐抓共进。     

模糊数学综合评价在篮球技术技评中的应用研究

本文通过对河北、山西、陕西、河南四省专家的调查访问,将模糊集合理论与计算机方法引入术科技评工作中。首次建立了专家权重的篮球技评模糊综合评价系统,并用该系统软件成功的进行了实验和应用。