关于友循环矩阵开平方的一种算法

给出了求友循环矩阵的平方根矩阵的一种算法,同时证明了n阶友循环矩阵的平方根矩阵中仍为友循环矩阵的矩阵个数为2n个。最后还给出了求友循环矩阵主平方根矩阵的算法。     

"口诀法":一种求分部积分的简便方法

在高等教学数学中,经济管理学科各专业学生分部积分法求积分普遍感到比较困难,其关键就是不能正确地选取分部积分法公式中的u和dv,本作结合自己多年的教学实践,归纳总结出一种利用分部积分法求积分的简便方法,即“口诀法”。     

硅微陀螺仪正交误差和失调误差抑制线路

分析了正交误差和失调误差产生的原因,推导了正交误差和失调误差的表达式.开环系统分析表明,为了避免开环系统出现谐振峰,两模态(驱动模态与敏感模态)频差δf必须小于1/(2Qy).为了消除正交误差、失调误差及电容传感器自身非线性的影响,设计了一个可实现正交误差校正的闭环反馈电路.实验结果表明,正交误差和失调误差得到较好抑制.与开环检测相比,闭环反馈回路将标度因数非线性从16.02%减少到0.35%,将最大测量范围从±270(°) /s扩展到±370(°) /s,将零偏稳定性从155.2(°) /h提高到60.6(°) /h.     

格林公式的几个应用

格林公式是多元微积分学中一个重要的公式.本文通过几个实例,对如何灵活运用格林公式解决第二类曲线积分问题进行了一些探讨.     

A hybrid system of pedagogical pattern recommendations based on singular value decomposition and variable data attributes

To carry out effective teaching/learning processes, lecturers in a variety of educational institutions frequently need support. They therefore resort to advice from more experienced lecturers, to formal training processes such as specializations, master or doctoral degrees, or to self-training. High costs in time and money are invariably involved in the processes of formal training, while self-training and advice each bring their own specific risks (e.g. of following new trends that are not fully evaluated or the risk of applying techniques that are inappropriate in specific contexts).This paper presents a system that allows lecturers to define their best teaching strategies for use in the context of a specific class. The context is defined by: the specific characteristics of the subject being treated, the specific objectives that are expected to be achieved in the classroom session, the profile of the students on the course, the dominant characteristics of the teacher, and the classroom environment for each session, among others. The system presented is the Recommendation System of Pedagogical Patterns (RSPP). To construct the RSPP, an ontology representing the pedagogical patterns and their interaction with the fundamentals of the educational process was defined. A web information system was also defined to record information on courses, students, lecturers, etc.; an option based on a unified hybrid model (for content and collaborative filtering) of recommendations for pedagogical patterns was further added to the system. RSPP features a minable view, a tabular structure that summarizes and organizes the information registered in the rest of the system as well as facilitating the task of recommendation. The data recorded in the minable view is taken to a latent space, where noise is reduced and the essence of the information contained in the structure is distilled. This process makes use of Singular Value Decomposition (SVD), commonly used by information retrieval and recommendation systems. Satisfactory results both in the accuracy of the recommendations and in the use of the general application open the door for further research and expand the role of recommender systems in educational teacher support processes.     

Excel表在财会中的应用

在具体会计电算化实践中,Excel表格的应用主要体现在函数计算应用、公式复制应用、数据链接应用、图表制作应用等几个方面。财会人员熟练地掌握Excel表在财会中的应用的技巧,有利于提高会计工作质量和工作效率。     

浅谈中学几何习题的变式教学

通过变式教学,可培养学生思维的灵活性、深刻性、严谨性和创造性．     

蛙泳教学纠错口诀模仿之运用

文章运用文献资料研究法对蛙泳教学口诀模仿进行研究,发现在蛙泳学习中,腿的技术很复杂,手腿配合、呼吸配合节奏感很强。文章旨在让教师在教学过程中注重纠错这一环节,以期使教师在教学中较多采用口诀、模仿与互助,并收到事半功倍的效果。     

旋转体体积的一个积分公式

利用微元法,给出了空间曲线绕任一直线旋转一周生成的旋转体体积的一个积分公式.     

英、汉语言文化中的礼貌套语

这篇文章将从语用学的社会语言学（sociolinguistics of pragmatics)的角度出发比较并分析英语两种不同文化背境中的一些惯用礼貌套语（politeness expression),例如,恭维、问候、道别、邀请、馈赠等等。它企图基于前人的研究结果从而揭示英汉文化中语言交际的礼貌差异。通过分析,指出它在跨文化交际（cross-cultural communication)中的意义。该文还提出另一种特具汉语特色的礼貌现象,作为有关汉语礼貌现象研究的补充。