查询词典 fast

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

一种提高空间伪码扩谱测距精度的实用。。。摘要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

摘 要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

In order to eliminate the aliasing, at each step of decomposition or reconstruction, fast Fourier transform is performed the result obtained by convolving the input signal with filters, setting frequency spectrum of the redunctant frequency components to be zero, and inversely fast Fourier transforms the result after zeroing. The result after processing is the input signal of next step,and single sub-band reconstruction is implemented to extract the feature item of GPS data sequence.

为消除频率混淆现象，分解与重构时，每作一次信号与小波卷积后，将其结果作一次快速傅立叶变换，频谱中多余的频率成分的谱值置零，再对置零后的频谱进行傅立叶逆变换，然后继续进行小波包的分解与重构，从而实现单子带重构提取GPS数据序列特征项。

I would like to believe that there is a Paradise where one is always young and full-bladdered; here all the day one dillies and dallies with an amorous multitude of houris, beautifully spotted; where jack-rabbits that run fast but not too fast are as the sands of the desert; where each blissful hour is mealtime; where in long evenings there are a million fireplaces with logs forever burning and one curls oneself up and blinks into the flames and nods and dreams, remembering the old brave days on earth, and the love of one's Master and Mistress.

我宁愿相信我去往的是天堂。那里的每个人都青春永驻，美食饱腹；那里每天都有浪漫精彩的事情发生，那儿的美女近乎完美无瑕。那儿的杰克兔如天堂美女一样轻盈地奔跑于沙漠中。在那儿，我们时刻都可以享受到美味佳肴。在每个漫长的夜晚，都有无数永不熄灭的壁炉，那些燃烧的木柴一根根卷曲起来，闪烁着火焰的光芒，我们倦怠地打着盹，进入甜蜜的梦乡。梦中会再现我们在人世间的英勇时光，以及对男主人和女主人的无限爱怜。

I would like to believe that there is a Paradise where one is always young and full-bladdered; here all the day one dillies and dallies with an amorous multitude of houris, beautifully spotted; where jack-rabbits that tun fast but not too fast are as the sands of the desert; where each blissful hour is mealtime; where in long evenings there are a million fireplaces with logs forever burning and one curls oneself up and blinks into the flames and nods and dreams, remembering the old brave days on earth, and the love of one 's Master and Mistress .

我宁愿相信我去往的是天堂。那里的每个人都青春永驻，美食饱腹；那里每天都有浪漫精彩的事情发生，那儿的美女近乎完美无暇。那儿的杰克兔如天堂美女一样轻盈地奔跑于沙漠中。在那儿，我们时刻享受到美味佳肴。在每个漫长的夜晚，都有无数永不熄灭的壁炉，那些燃烧的木柴一根根卷曲起来，闪烁着火焰的光芒，我们倦怠地打着盹，进入甜蜜的梦乡。梦中会再现我们在人世间的英勇时光，以及对男主人和女主人的无限爱怜。

The composite material can be used in the in-situ fast insulation enwrapping of broken wire and cable as well as the in-situ fast repair of conveyor belt in mine.

该复合材料可用于煤矿井下电线电缆的现场安全快速包覆、运输带的安全快速修复。

Travis is a glib the boy, the special skill is fast hoodwinks one with his language very fast you one, he does not welcome to Baker's arrival, moreover the ironclad thoughts have not been willing to leave Brazilian half step -- him to seek originally hide in the jungle deep place mystical buried treasure; Ascends the sky as if also disliked that are not enough for Baker's trouble, also sent one to be called Mariana the Rosa Switzerland.

特拉维斯是个油嘴滑舌的小子，特长是用他飞快的语速把你蒙得一愣一愣，他对贝克的到来并不欢迎，而且铁定了心思不肯离开巴西半步——原来他一直在寻找隐藏在丛林深处的神秘宝藏；上天似乎还嫌给贝克的麻烦不够多，又派来了一个叫玛丽安娜罗莎瑞。

I'm kind of hasty, I walk fast, write fast, even faster when I eat, It's like ingurgitating almost, therefore, I had stomach issue, duodenal ulcer.

我性急图快，走路快，下笔快，吃饭更快，简直是狼吞虎咽，因此，得了胃病、十二指肠溃疡。

We can conclude that EXT_draw_instanced is about twice as fast as nvidias pseudo instancing which in turn is about twice as fast as the standard drawing method.

我们推断， EXT_draw_instanced 比 nvidias 伪实例化速度大约快两倍，而伪实例化又是常规绘制方法速度的两倍。

Today, nothing is more representative of the fast pace of modern society than fast food.

今天，没有什么更多的现代社会的快节奏比快餐的代表。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。