A Few Words on Composition and Play Analysis of "Waltz in C sharp minor" of Chopin

Frederic Francois Chopin,was one of the creative composers in the period of romanticism.The dissertation starts with three aspects,which are the composition background,the form and structure and the performing techniques,analyses on the "Waltz in C sharp minor"(Op.64-2) of Chopin,with the intentions of grasping the emotion and meaning in music more precisely and interpreting the composition more perfectly in the future performance.     

Spoken Grammar for Chinese Learners

Currently, the concept of spoken grammar has been mentioned among Chinese teachers. However, teach- ers in China still have a vague idea of spoken grammar. Therefore this dissertation examines what spoken grammar is and argues that native speakers’ model of spoken grammar needs to be highlighted in the classroom teaching.     

An Analysis on Teacher-student Role Changing in Interactive Teaching Mode

Teachers and students play important roles in teaching activity,and they are the most essential parts of the system.The relationship between teachers and students,the core schooling interpersonal relationship,directly determines whether the teach ing activities can go smoothly or not,and is an important index to measure the quality of teachers and students’school life,and also is an important factor that affects the social function of education.For a long time,relationship between teachers and students has been a hot topic in education and in different sectors of the society.This dissertation aims at discussing the teacher-student role changing in interactive teaching mode to provide reference for building a harmonious relationship between teachers and stu dents.     

基于诱导信息的交通流动力学特征与非线性密度波研究

In this dissertation,based on the existing macro- scopic and microscopic models for traffic flow,several improved mathematical models in accordance with the rapid development of intelligent transportation system (ITS) are proposed,and the corresponding theoretical analysis and numerical simulation are performed.In     

Investigation Report of Culture Teaching in College English Listening Class in Colleges of Ethnic Minority Area

In this dissertation, questionnaire is the main way to accomplish the research. Some basic information of culture teaching in today’s English listening class has been drawn from those questionnaires carried out by the students from Hechi University. Though the analysis on the statue of cultural teachings, the factors that confine the cultural teaching and the importance of cultural teaching in college English listening class, we intend to help university students have a better understanding of the significance of cultural teaching. By doing so, cultural teaching will be paid more attention to.     

Barry C.KEENAN,Neo-Confucian Self-Cultivation

Barry C.Keenan has been acknowledged as an influential American Sinologist since his doctoral dissertation entitled The Dewey Experiment in China:Educational Reform and Political Power in the Early Republic was published by Harvard University Press in 1977.His deft approach to the sociological history of Chinese education was further exemplified in his second monograph,Imperial China's Last Classical Academies:Social Change in the Lower Yangzi,1864-1911,published by the University of California Press in 1994.This academic background suggests that Keenan had been actively involved in the new cultural history movements that sprung up in the 1970s.     

Establishment and Control of Water Hyacinth(Eichhornia Crassipes) Invasive Species in Aquatic System

This dissertation chiefly examines the functions of water hyacinth and discusses the potential problems associated with invasive species.In general,E.crassipes has significant potential as a source of biomass energy,such as improving physical properties of soil as well as soil structure;additionally,ventilates the soil and brings great conveniences for water penetrating through soil.With regard to the overall research,an amount of significant research has illustrated that water hyacinth can form dense mats that spread out across water surfaces in the end blocking the entire water body.Specifically,water hyacinth would change water clarity and lessening phytoplankton production,dissolved oxygen,nitrogen,phosphorous,heavy metals and concentrations of other pollutants.Relevant studies quoted in this report would gain prominence in further aquatic conservation and maintaining the integrity of ecosystem function since previous research and experience would be highlighted and explored in depth.Although some gaps between theory and experimental evidence still exist,preferable management method combines chemical,mechanical,fire and biological control methods with land management changes.     

How to Develop Students＇ Writing Ability

Keynote: This dissertation presents an analysis of the cause of students‘ low ability of writing, emphasizes the interrelations of the 4 abilities and focuses on the importance of the change of English teachers‘ concepts.     

天线增益和天线效率对卫星链路通信性能的影响

推导了地球站天线增益、天线效率对卫星通信链路性能影响的公式,探讨了天线噪声温度、系统噪声温度对卫星通信链路的影响等问题。     

基于HFSS的915MHz微带天线设计与仿真验证

以计算机电磁模拟仿真软件HFSS为平台,以915MHz矩形微带贴片天线为例,介绍天线工程设计与仿真验证的过程。文中采用经典的传输线理论估算设计参数,并在计算机上建模与验证,根据仿真结果优化调整设计参数,使所设计的天线在给定条件下达到可实现的最佳性能指标。     

超宽带缝隙螺旋天线仿真与教学应用研究

改革微波技术与天线实验课程实验教学模式,采用全波电磁仿真软件,设计和仿真了超宽带缝隙结构的平面等角螺旋天线和阿基米德螺旋天线。设计的两种天线都采用同轴电缆直接馈电的方式,结构简单,易于实现。优化和仿真结果表明,在0.4~2GHz的频率范围内,这两种天线的输入电压驻波比小于2,方向图和增益等指标均达到了设计要求,适合于实际应用。仿真结果展示了全波电磁仿真软件的应用效果。     

IE3D仿真软件在天线教学实践中的应用

天线技术是通信及其相关专业学生所必修的一门课程。但天线理论往往需要大量的电磁场知识为基础,同时又与工程实践联系十分紧密。而目前大中专院校对于天线课程的教学实践开设不足,造成学生学习困难。本文利用基于矩量法的电磁场仿真软件IE3D,针对天线技术中研究热点的微带天线,用计算机仿真代替实物天线教学实验,这一方法的应用使学生能很好的理解天线的理论,提高学习兴趣与效率。     

Practical realization of dual S arm antenna for beam steering applications

A dual S shaped micro strip antenna with a realistic feed is proposed for generation of tilted beam radiation pattern pertaining for beam steering applications. To achieve this, four feeding points are located at a distance of 5.6 mm from the antenna centre. These feeding points when excited one by one generate four tilted beams in four different space quadrants, thus yielding a beam steerable antenna. Importantly, since the proposed antenna is symmetrical in the structure, all the four tilted beams have the same radiation pattern characteristics. A further enhancement of the antenna bandwidth is also achieved using 100-μm capacitive coupling between the feed and the antenna strip.     

具有不同宽槽数的矩形微带贴片天线多带特性研究

主要研究了多带工作的特性,并通过设计矩形贴片微带天线--包含不同数目的并放置在两辐射端的槽, 进行分析. 分析基于MOM仿真软件包, 结论表明一个贴片上有3个槽的天线具有多带特性: 4个振荡频率分别在1. 6, 1. 8, 2. 65, 和4. 83 GHz, 并且具有足够的反射损耗和增益值. 同时证明了带有2对槽的贴片天线(槽分别位于两辐射端)有双带特性, 其振荡频率分别在1. 64和1. 8 GHz, 而且返回损耗和增益值很好.     

天线实验教学仿真系统的研究

采用Visual Basic软件开发工具设计并实现了天线实验教学仿真系统。首先给出了系统的构成,讨论了天线模型的建立、天线方向性图和天线输入阻抗的测量,最后介绍了系统的软件实现过程。所设计的天线实验教学仿真系统实现了天线的方向性图和输入阻抗的测量过程。应用表明,天线实验教学仿真系统具有交互性好、实用和逼真等特点。     

基于复合左右手结构的零阶谐振小型天线设计

论文中提出了一种基于复合左右手结构的零阶谐振小型天线,由四个等腰三角形贴片对称排列而成。使用软件仿真和优化得到天线零阶谐振频率为4.7GHz,并给出了各单元的具体参数。仿真结果,在中心频率4.7GHz处,天线的电压驻波比为1.16,天线增益为6.8dB,半功率波瓣宽度为83.1度。     

用于通信的超宽带印刷天线

1IntroductionUltra-wideband(UWB)microwave antennas are ofinterest for a variety of applications such as electroniccountermeasure,transient radars,mine detection,andunexploded ordnance(UXO)location and identifica-tion.In the early2002,the release of the UWB forcommercial communications by the Federal Communi-cation Commission(FCC,USA)sparked renewed in-terest in the subject of UWB antennas.Conventional UWB antennas such as log-periodic orspiral antennas exhibit good UWB characteristi…     

宽带印刷天线与双极化微带及波导缝隙天线阵(英文)

In order to meet the urgent needs in wireless com-munications , microwave i mage synthetic aperture ra-dars (SAR) ,and electronic warfare systems ,this dis-sertation studies several types of broadband dual-polar-ized planar antenna elements and arrays ,and proposesa few of novel designs with experi mental verification.The main accomplishments reported in the dissertationare as follows . First ,the phenomena of symmetryin electromagne-tism, both in theory and in applications , are sum-marized.…