基于多系数保角变换法的船舶垂荡纵摇运动仿真     

张腾  任俊生  范小晴  张秀凤 《上海海事大学学报》2019,40(3):51-56

为给航海模拟器建立实用可靠的船舶在波浪中运动的数学模型,基于二维线性势流理论,采用多系数保角变换法对每个船舶横剖面进行高精度拟合,计算各个横剖面的水动力系数和波浪激励力,利用Visual Studio自主开发出船舶在规则波中的纵向运动数值模拟程序。为验证这个数值模拟程序的可靠性,对S175集装箱船在迎浪中运动的幅值响应因子(response amplitude operator, RAO)进行数值计算。结果表明:当弗劳德数为0.275时,RAO计算结果在大部分频率范围内与试验结果吻合良好。因此,这个数值模拟程序能准确地对船舶在波浪中的运动时历进行仿真。  相似文献   

美源自模仿媒介符号的不擅长性——从“包孕性顷刻”想到的     

刘莎 《柳州师专学报》2014,(4):16-18

莱辛在《拉奥孔》一文中指出了诗和画属于不同媒介艺术并对其进行了详细论述,本文在此基础上讨论,它们作为使用不同媒介传播符号的艺术样式,如何通过自己媒介符号的"不擅长性"来延缓"阅读时间",制造阅读动力。  相似文献   

数学建模优化程序设计与数学原理的综合运用     

王福来 《中国现代教育装备》2011,(17):64-65

从符号与数值的转化、同余映射中的周期长度及分阶段执行程序等3个方面,以实际例子研究了如何在实践中运用数学原理来优化程序设计、节约运行时间,达到利于解决数学建模问题的目标。  相似文献   

大学数学学习中的“知其所以然”     

谢如龙  戴泽俭  陈侃 《巢湖学院学报》2011,13(3):128-131,148

在学习大学数学的过程中,很多学生只知道套用某种方法解决问题或者硬记一些结论,即知其然,但是并不知这种方法的深层次含义,也不知这些结论成立的背景,即并不知其所以然。本文通过几个例题来说明一些数学方法的深层次含义和某些结论成立的背景。  相似文献   

数学建模在高等数学教学中的应用实例     

关鹏  马松林 《巢湖学院学报》2011,(6):153-155

数学建模的思想已经渗入理科各个学科,而数学建模真正走进课堂还需要认真探讨与实践。分析了高等数学教学中结合数学建模思想的重要性与可行性,联系高等数学教学中的一个内容即微分方程问题,探讨了高等数学教学与数学建模的有机结合.  相似文献   

在线性规划教学中培养学生数学建模能力初探     

韦程东  林绍松  韦莹莹 《高教论坛》2008,(5)

本文主要阐述如何在线性规划教学中培养学生数学建模能力,让学生了解如何运用所学的线性规划知识去分析和解决实际问题,提高学生的应用能力和创新能力.  相似文献   

"数感""符号感"与其它——《课程标准》大家谈   总被引：8，自引：5，他引：8  

郑毓信 《数学教育学报》2002,11(3):30-32

《课程标准》作为课程改革的指导性文件应加强科学性和严谨性.应对“(数、符号)感”、“观念”、“能力”、“意识”等词的涵义和用法做出更为深入的研究.“数感”的提法有一定合理性;“帮助学生掌握数学的符号语言”则要比“发展学生的符号感”这一提法更为恰当.  相似文献   

Cultivating divergent thinking in mathematics through an open-ended approach     

Oh Nam Kwon  Jee Hyun Park  Jung Sook Park 《Asia Pacific Education Review》2006,7(1):51-61

The purpose of this study was to develop a program to help cultivate divergent thinking in mathematics based on open-ended problems and to investigate its effect. The participants were 398 seventh grade students attending middle schools in Seoul. A method of pre- and post-testing was used to measure mainly divergent thinking skills through open-ended problems. The results indicated that the treatment group students performed better than the comparison students overall on each component of divergent thinking skills, which includes fluency, flexibility, and originality. The developed program can be a useful resource for teachers to use in enhancing their students’ creative thinking skills. An open-ended approach in teaching mathematics suggested in this paper may provide a possible arena for exploring the prospects and possibilities of improving mathematical creativity.  相似文献   

高炉专家系统在本钢五号高炉的应用   总被引：1，自引：0，他引：1  

冯震  董世泽 《辽宁科技学院学报》2003,5(4):29-31

介绍了本钢5^#高炉专家系统的主要内容及应用概况，通过现场应用，该系统运行可靠，对炉况起到了准确预测及有效控制的作用。  相似文献   

Structuring Occasions     

Jo Towers  Brent Davis 《Educational Studies in Mathematics》2002,49(3):313-340

Within the mathematics education literature, the term constructivism has been subject to a diversity of interpretations, many of which are trivializations of original theoretical work. We suggest that trivialized versions of constructivism continue to be promulgated due, in large part,to misunderstandings of some of the vocabulary adopted by its advocates. This situation has been the source of considerable frustration in our ongoing efforts to communicate the insights and implications of radical and social constructivist theories to preservice and practicing teachers. We discuss some of the specifics of these frustrations along with strategies intended to flag and circumvent them in our work with teachers. The writing is structured around a set of recursively elaborated interpretations of a classroom episode. Developed around varied understandings of the terms structure and construct, these interpretations are intended to show how we have worked with teachers to foster a deep appreciation of how learning might be reframed as dependent on, rather than determined by, teaching.This revised version was published online in September 2005 with corrections to the Cover Date.  相似文献