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Fast Fourior Transform plays an important roll in digital signal processing,its the kernel algorithm in a lot of process for signal processing.this paper first summarizes many algorithm for Fast Fourior Transform that in common use and synthesizes many reasons to adopt the radix-2 Demation-in-Frequency algorithm,then it compares two ways of implementing digital signal processing,the two ways are in field-programmable gata array and in programmable digital signal processor respectively.it points out the advantage and disadvantage of two ways.

快速傅立叶变换是数字信号处理中的重要内容之一，是很多信号处理过程中的核心算法。本文先总结了快速傅立叶变换的一些常用算法，并综合种种因素，采用了基2按频率抽取算法作为实现算法，然后将以现场可编程门阵列和以DSP处理器这两种实现数字信号处理的方式进行了比较，指出了各自的优点和不足之处。

For fast orthogonal transformation algorithm, the paper carries out detailed research and analysis. In terms of many transform coding, it put forward these four rapid transformation algorithms which are Discrete Cosine Transform, Discrete Fourier Transform, Harr Transform, Walsh-Handmaid Transform, and analysis of these fast algorithms in image compression applications.

对于正交变换的快速算法本文进行了详细的研究与分析，并根据各种变换编码，提出了离散余弦变换、离散傅立叶变换、Harr变换、Walsh-Hadamard变换这四种变换的快速算法，并分析了这些快速算法在图象压缩中的应用。

Doppler frequency offsets in rapid mobile environments result in both the fast fading of radio channels and intercarrier interference in Orthogonal Frequency Division Multiplexing systems. In order to combat the impact of ICI on OFDM systems in fast fading channels, an ICI mitigation technique is proposed in this paper.

针对高速移动环境下多普勒频偏造成移动信道的快衰落和正交频分复用系统中子载波间干扰问题，提出了一种适合快衰落环境的OFDM系统子载波间干扰抑制算法。

Dispatch of sina science and technology on Feburary 20 evening news, be oppugned in the light of fast thunder " larcenous user file " be related, fast thunder company just makes a response.

新浪科技讯 2月20日傍晚消息，针对迅雷被质疑&盗窃用户文件&一事，迅雷公司刚刚作出回应。

Now Friday, says I, laying down the discharg'd Pieces, and taking up the Musket, which was yet loaden; follow me, says I, which he did, with a great deal of Courage; upon which I rush'd out of the Wood, and shew'd my self, and Friday close at my Foot; as soon as I perceiv'd they saw me, I shouted as loud as I could, and bad Friday do so too; and running as fast as I could, which by the way, was not very fast, being loaden with Arms as I was, I made directly towards the poor Victim, who was, as I said, lying upon the Beach, or Shore, between the Place where they sat, and the Sea; the two Butchers who were just going to work with him, had left him, at the Suprize of our first Fire, and fled in a terrible Fright, to the Sea Side, and had jump'd into a Canoe, and three more of the rest made the same way; I turn'd to Friday, and bid him step forwards, and fire at them; he understood me immediately, and running about forty Yards, to be near them, he shot at them, and I thought he had kill'd them all; for I see them all fall of a Heap into the Boat; though I saw two of them up again quickly: However, he kill'd two of them, and wounded the third; so that he lay down in the Bottom of the Boat, as if he had been dead.

我把放过了的鸟枪放下来，把那支装好弹药的短枪拿在手里，对星期五说

Some work of the study of the fast algorithms- Fast Multipole Method for analysis of electromagnetic compatibility has been done in this paper.

本文以矩量法为基础，深入研究两层快速多极子算法，在高效分析车载系统的电磁兼容性上做了一些工作。

The fast multipole method and the multilevel fast multipole algorithm are new efficient methods for analysis problems of electrically large objects.

快速多极子方法和多层快速多极算法是研究电大尺寸目标问题的新型的快速高效数值算法。

Order method is introduced, and the fast multipole algorithm and the precorrected fast fourier transform method are described in detail, some further developments of these methods are given at last.

介绍了面元法的快速算法及B样条高阶方法的发展概况，对快速多极算法及预修正快速傅里叶变换方法做了详细的介绍，指出了这些方法今后的发展方向。

The well type gas nitrogenation oven uses the multi-layered multistage multi-link multi-spot assignment type ammonia input mode, enables the active nitrogen member fast evenly with the work piece surface union, forms the even fast nitrided level, the coordinate high speed spiral air flue, the effective addressing work piece blind hole and the deep hole nitriding craft, nitrides strongly by the microcomputer programmed control infiltrates, the diffusion technology heating curve.

井式气体氮化炉采用多层多段多环多点分配式氨气输入方式，使活性氮气分子能快速均匀地与工件表面结合，形成均匀快速氮化层，配合高速螺旋风道，有效解决工件盲孔和深孔地氮化工艺，由微电脑程序控制氮化强渗、扩散工艺加热曲线。

By using the noncircular characteristics, the fast algorithm provides a better performance than the traditional fast algorithm such as propagator method.

快速算法由于利用了信号的非圆特性比常见的快速算法，如传播因子算法等具有更高的测向精度。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。