在DSP上的实现混合基FFT

介绍了TI公司生产的实验板TMS32 0C5 4 0 2DSK和专门的调试工具CodeComposerStudio(CCS) ,以及混合基FFT的算法 ,阐述了在TMS32 0C5 4 0 2DSK实验板实现混合基FFT .同时对在DSP实现混合基FFT的结果与在用PC机用高级语言实现混合基FFT的结果作了比较     

80后的创业新天地

年轻,但是我敢想敢做 “铁血”是一家名副其实的“80后公司”——创始人蒋磊是1984年出生的,铁血网总监级以上的5个高管,也全部都是80后。在全公司90多名员工里,80后员工超过了90％。在军品这个相对冷门的B2C领域,这群80后同样做得风生水起．网站年营业收入已经近亿。     

离子共存问题的突破

离子共存问题是高考的常见题型。在高考试卷中涉及最多的是复分解反应规律(占80%以上),另外近年来主要涉及的是氧化还原反应问题。突破方法:运用无机化学反应规律,全面理解离子能否共存的条件。1.因发生复分解反应而不能大量共存:离子间反应生成难溶、难电离、挥发性物质的,则不能大量共存。2.因发生氧化还原反应而不能大量共存:N O3-、M nO4-、C lO-与S2-、I-、Fe2 ;Fe3 与S2-、I-;S2-、SO32-与H ;H 与S2O32-3.因发生完全水解反应而不能大量共存:Fe3 与AlO2-、C O32-、H C O3-;Al3 与A lO2-、C O32-、H C O3-、S2-;N H4 与…     

Flash存储器AT29C256在单片机中的接口研究

AT29C256是ATMEL公司生产的5V供电Flash存储器。它共有256K位(32k字节)的存储容量,具有结构紧凑、存储容量大等特点。它的接口简单、操作方便,特别适合控制系统存放程序和大量的数据等。AT29C256能够多次擦写,在现代的单片机系统中得到了广泛的应用。本文将主要研究AT29C256在单片机系统中的应用及程序设计。     

基于S3C2410控制的CAN总线接口设计

采用Samsung公司32位ARM9核的S3C2410微处理器与Philips公司的经典CAN控制器SJA1000进行接口设计，分析了SJA1000读写时序，并给出了硬件电路原理图和SJA1000的驱动程序流程图，应用在嵌入式测控系统中，取得了良好的数据传输效果．     

Intel80C196MC在交流变频空调中的应用

Intel80C196MC是Intel公司专门为三相交流电机变频调速开发的CPU。具有被称作WFC的波形发生器，可以直接驱动逆变器的6个开关器件。本文提出使用80C196MC16位单片机作为变频空调室外控制电路的CPU，驱动智能功率模块IPM，以实现对空调压缩机的控制，提高了压缩机的工作性能并达到节能效果，同时给出了部分主要电路原理图。     

加密芯片再加密的一种设计方法

众所周知,INTEL 8751BH,8752BH,87C51,87C51FA/FB等单片机的 EPROM内部有两个程序保密位和32个字节的加密表,具有两级保密功能。但随着解密技术的相应发展,越来越多的公司和个人已能破译读出上述加密芯片内部的EPROM的源程序,并公开向社会     

基于Cortex M3果蔬大棚管理系统的设计

设计以ST公司的Cortex M3微处理器STM32F103为控制核心,可实时监测果蔬大棚的温度、湿度、CO2浓度等参数,并将采集的实时数据通过CAN总线传输至计算机终端,采用可裁剪的、抢占式的、实时多任务μC/OS-Ⅱ操作系统以及图形化界面设计软件μC/GUI,通过触摸屏完全实现窗口界面,方便了人机交互.该系统具有易操作、性能稳定等优点.     

年轻,但是我敢想敢做

"铁血"是一家名副其实的"80后公司"—创始人是1984年出生的蒋磊,其他总监级以上的5个高管,也都是80后。而在全公司90多名员工里,80后员工超过了90%。在军品这个相对冷门的B2C领域,这群80后做得风生水起,网站年营业收入已经近亿元。2001年,读材料学专业的"宅男"蒋磊开始创办军事阅读网站,3年后,铁血网获得100多万元的投资,流量最高时在全球排到了500多名。2008年,依靠军事阅读起家的铁血网开始涉足军品     

水稻免耕栽培生理基础——Ⅲ.免耕水稻对~(14)C、~(32)P的吸收与分配

以威优64、陆青早1号为材料,免耕能促进水稻叶片对~(14)C的输出和根系对~(32)P的吸收及输出,促使各生育期的生长中心集中~(14)C、~(32)P的分配优势。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.