首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
本文主要介绍VHDL语言的一些设计技巧:1、充分建立VHDL语言是硬件描述语言的概念,把每一步设计与具体电路紧密结合,便于逻辑综合;2、慎用IF-ELSE语句,可以减少硬件开支,简化电路设计;3、以译码器为例,介绍三种VHDL描述方法。  相似文献   

2.
VHDL描述的直接数字信号合成器的设计   总被引:1,自引:1,他引:0  
介绍了基于VHDL语言描述的直接数字信号合成器的研制.该设计采用DDS的原理,通过vHDL语言进行硬件电路的描述,插入分频电路、相位累加电路可以很好地实现高频、低频信号的产生.通过软件仿真与硬件测试,效果理想,具有一定的实用价值.  相似文献   

3.
文章通过对高速摄影测量仪数字测角系统输出的角度数据从22位BCD码到18位二进制码的硬件译码设计过程的论述,具体分析了设计中的确保精度问题;同时着重探讨利用VHDL硬件描述语言实现电路逻辑设计的方法,对利用VHDL语言设计大规模高集成度电路有一定的参考价值。  相似文献   

4.
用VHDL语言在CPLD器件上实现了一种模拟跑步机的状态控制,能够用LCD显示屏实时显示各种状态信息.介绍了跑步机电路的设计方法,用状态机的方式实现和转换跑步机各种功能,并给出了状态机的功能仿真波形图.将跑步机功能的设计集成在一块CPLD芯片上,具有体积小、可靠性高、功耗低的特点.由于采用模块化的设计,对功能的修改和增加只要修改VHDL源程序,而不必更改硬件电路,从而实现数字系统硬件的软件化.  相似文献   

5.
孟海斌 《职大学报》2010,(4):100-103
EDA技术的应用引起了电子产品系统开发的革命性变革。利用先进的EDA工具,基于硬件描述语言,可以进行系统级数字逻辑电路的设计。本文简述了VHDL语言的功能及其特点,并以双6位数字密码锁设计为例,介绍了在Max+plusⅡ10.2开发软件下,利用VHDL硬件描述语言设计数字逻辑电路的过程和方法。  相似文献   

6.
本文介绍了用可编程逻辑器件 PLD实现单片机与七段显示器接口电路的设计方法 ,给出了主要模块的 VHDL语言程序 ,该设计有利于提高接口的功能  相似文献   

7.
中英文化的差异渗透到日常生活的各个领域,其中包括描述动物的词汇。本文阐述了在理解和翻译这些动物形象的比喻时所需要应用的几种方法,英语和汉语中语言现象和思维表达方式上的差异必须通过转换的方式来予以弥补。转换的方式可以根据实际需要而采用不同的方法。我们在翻译的时候除了要考虑上下文以外,还要注意文体、创作的风格等其他因素。只有这样翻译出来的动物形象才能既符合语言习惯又起到传情达意的效果。  相似文献   

8.
EDA设计工具multisim多用于模拟电路的仿真分析。本文以数字电路中的模计数器为例,利用multisim设计工具进行数字电路设计和仿真的研究。本文就multisim所支持的VHDL语言设计实现了同样的电路,并对比分析了两种设计方法各自的特点。分析表明multisim设计工具不仅擅长于模拟电路的分析设计,在数字电路的分析设计中其功能也颇为强大。  相似文献   

9.
本文介绍的电力系统故障数值仿真计算,是采用机电过程同步仿真的方法.可以仿真单机无穷大系统中各种电网故障和电气切换操作过程。数学模型处理:发电机采用1d×1q阻尼绕组模型,用5阶派克方程描述发电机的暂态性能;励磁系统采用IEEE的I型系统;汽轮机及调速系统采用中问再热式高、中、低压三缸结构和机械液压调速系统简化模型;轴系采用集中质量块模型;电网采用多π节输电线模型。在电气振荡过程的暂态计算中,采用隐式梯形法,程序采用标准的FORTRAN语言,按各数学模型分块结构实现了模块化,可进行长时间的稳态和故障暂态过程系统仿真。由于篇幅限制,本程序在教学和科研中的应用情况将在后续文章中介绍。  相似文献   

10.
在翻译的过程中,对语篇语场、方式和基调的认识和把握,是译者决策及操作中的三个重要因素,三者相辅相成。不同语篇范围、方式和基调的翻译都不尽相同,语境、语篇与翻译学的关系息息相关。翻译研究者要研究语言,掌握语言的基本结构,明白语言中语篇如何在实际中运作,了解语言的本质及其功能,才可以系统地、有效地对研究结果进行描述或解释,并为理论研究和应用研究提供具体的资料和依据。  相似文献   

11.
Since the late 1960s,culture has been considered tighter with communication.Culture IS based on the community of communication.Communication involves people and their environment.Thus culture is an important factor in communication.Today with modem economic and technological development,intercultural communication is mole important than ever before. When people from different cultural background communicate with each other,their social stereotype pattern of behavior, their habits of language and thought differ from one another,because these are the possible factors that affect intercultural communications.Culture norms also change,culture may be transferred as signs but we have to study and understand the above carefially.  相似文献   

12.
The article introduces Shakespeare's tragedy "Hamlet".Hamlet wants to revenge for his father.But when the opportunity is coming,he delays his revenge.The passage analyzes the causes of his delay from Hamlet's characters.  相似文献   

13.
The thesis mainly discusses the character of the heroine in Charlotte Brontes famous novel "Jane Eyre". There are three major parts-introduction,analysis which is the main body of the thesis,and conclusion.Jane Eyre,the heroine,is a new woman image who requires independence equality and freedom.The thesis just analyzes Janes these rebellious characters through four peroods of her experiences.First,in her childhood,she has shown her rebellious spirit.As an orphan,Jane suffers a lot of misery.Not only her aunt treats her cruelly,her cousins despise her,but also do servants have a prejudice against her.In Janes immature heart, she is unwilling to bear ill treatment.She rebels them bravely.Second,when she studies at Lowood,her rebellious spirit is exposed furtherly.Her view doest stay in Mrs Reeds,instead turns to the whole society.She makes hypocrisy of so-called charity to be discovered completely.At the same time,she declares her independent,equal rebellious thought to her friend-Helldn who endures oppression willingly.Third,she,as a governess in Thornfield Hall falls in love with Rochester-her master.During this period,her thought grows into maturity.Thought she loves him passionately,she never loses her dignity and independence for him.When she knows his mad wife still lives,she makes up her mind to leave him.For she doesnt want to become his mistress.Fourth,her refusal of St Johns proposal of marriage depicts Janes character.She knows John does not love her at all and his purpose of marriage is only to perform his great task missionary.Jane does want to become a sacrifice.She breaks traditional morality,then she goes back to Rochester.  相似文献   

14.
The context of a word consists of the other words surrounding it and the situation in which it is used.When we come across a new word in our reading,instead of looking it up in a dictionary for its definition,we can guess its meaning from its context.  相似文献   

15.
当代中国武术经历了时代的沧桑和变迁,在历经了文化和历史的发展与洗礼之后,依然发展、繁衍至今。在这样一个漫长的过程中,伴随着以社会环境和社会人群价值取向为主的变迁与变化,当代中国武术的发展与当代社会的发展正逐渐的呈现出某些相背离和不和谐的表象。通过研究,我们发觉中国武术中原本一些内在的东西正在不断的被遗忘,正在不断的流逝。本文试从中国武术在当代发展中的问题境域入手,解读中国武术在当今世界和社会中存在的一些问题,希望能够从中找到中国武术发展的"合法性"或"合时性"的内在依据,以挺立中国武术的脊梁。  相似文献   

16.
Introduction Whatisculture?Toputitsimply,culturemeansthe totalwayoflifeofaperson.Thissimpledefinitionimplies thatculturereferstothepattersofcustoms,traditions,socialhabits,values,beliefsandlanguageofasociety.As cultureissoinclusive,itincludesvirtuallyeverythingthat agroupofpeoplethink,say,doandmake.Followingthedefinitionofsociologists,theterm culturereferstothetotalpatternofbeliefs,customs,institutions,objects,andcharacterizesthelifeofhuman community.“Cultureconsistsofallthesharedproductsof …  相似文献   

17.
"Midnight"is a poem written by Archibald·Lampman,a Canadian poet,who loved nature very much,but his poor health prevents him from being very active in the outdoor life.So he is often the quite,thoughtful observer of nature in his poems.This article mainly talks about how to appreciate the poem in the following aspects:word selecting,rhyme,sentence structure and atmosphere.After reading this poem,we cannot get rid of the air of horror and mystery."Midnight" reveals another aspect of the nature:wild,rough and unknown.There is something else in the nature that can awe human beings even though we don't know what it is.  相似文献   

18.
Chapter Ⅰ Introduction Sitting in the rocking chair,Carrie dreams her future.This is the deep impression the novel"Sister Carrie"gives us,which is written by Theodore Dreiser(1871-1945),the great American realism writer.  相似文献   

19.
运用临场观察统计法、访谈法、文献资料法以及归纳法等研究方法,对现阶段国内青少年足球守门员防守技术运用情况进行统计与分析研究.结果表明:判断反应与选位能力不足是青少年守门员防守技术失误的主要原因,预判失误与技术粗糙以及缺乏自信等导致青少年守门员对抗条件下难以有效发挥位置优势,强干扰情况时出击争夺球失误多,重视反应训练和提高接球动作质量要求是提高青少年守门员技术水平的重中之重.  相似文献   

20.
提高体校学生的语素质的主要途径是课堂教学。体校语教师在教学过程中必须根据学生身心特点.设置合理的结构模式,以便顺利实现教学目标。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号