查询词典 chirp

A novel method that can identify moving status of birds accurately was proposed. The method can search the cross correlation coefficient of two neighboring high- resolution range profiles with advance-retreat method in spectrogram, based on the principal of generating micro-Doppler effects with the frequency-stepped chirp radar and characteristics of birds.

基于线性调频步进体制雷达微多普勒效应的产生原理，在距离一慢时间谱图上，针对鸟类目标特性，通过对精高分辨距离像进行分析，提出了一种利用进退法搜索相邻精高分辨距离像的互相关系数的方法来判别鸟类目标运动状态。

Consequently,the self-focusing properties of the pulse with large chirp in the nonlinear medium with normal dispersion were different from those of femtosecond pulse,but similar to those of nanosecond pulse.

因此，具有大啁啾的脉冲在非线性正色散介质中的自聚焦特性不同于飞秒脉冲，而与纳秒脉冲相似。

From now on I will not look the South Korean television does not buy the Han domestic products not to listen to the Han national anthem not to go to the South Korean Enterprise work to see South Korean not him If surpasses 1/3 South Korean such to think that I such do Did not have the Chinese South Korean to have nothing to eat the grass their American's running dog grass you to lull the North Korean nationality the shame to lose face to the person of Asian descent from the thinking matter's comedian clown Above me said the words are aim at the South Korean anti-Chinese chop suey to say are not aim at all South Korean I to believe that South Korea has understood in the middle of China's South Korean's Chinese also has did not understand affair's person key is needs to think this country how the leader is educates own national, despises The US government grass you to lull them askewly chirp should not be intensely the mule is the horse do take in there slides, if you dared to meddle the Chinese internal affairs labor to be killed by explosion your grass with the nuclear bomb you to let us not be able to live we also to let you not feel better fight in which both sides perish Does your mother

从现在起我不看韩国电视不买韩国货不听韩国歌不去韩国企业工作见到韩国人不哩他如果超过三分之一的韩国人这么想那我就这么干没有了中国韩国人都去喝西北风吧草他们的美国人的走狗草你麻痹朝鲜民族的耻辱给黄种人丢脸自以为事的小丑我上面说的话是针对韩国反华的杂碎讲的不是针对所有韩国人我相信韩国还是有很多了解中国的韩国人的中国人当中也有不明白事理的人关键是要看这个国家的领导人是怎么样教育自己的国民的，强烈鄙视美国政府草你麻痹别他们在那里唧唧歪歪是骡子是马拿出来溜溜如果你敢在插手中国内政劳资用核弹炸死你草你让我们活不了我们也让你们不好过鱼死网破吧干你娘的

First scanning the known handwriting materials then number them ,In pretreatment, we convert the valid part of the image into a standard size, as images carries out duotone and go throw off chirp handling in order to achieve better effect.draw features from the known handwriting materials with the Co-occurence,especially,we divided a copy of handwriting into 25 little pieces with the size of 128*128 ,drawing features from every little piecese with four directions(0 degree, 45 degrees, 90 degrees as well as 135 degrees) and calculate the four major feature values( veins and the statistical quantity of veins contrast and the statistical quantity of veins consistency Shang the statistical quantity of statistical quantity as well as the veins correlation of gray scale ), preservation all the feature value that drawn from all known ma terials to the handwriting characteristic database,then input the unknown handwriting materials, also using the method of the Co-occurence to draw those features, recycling the minimum European Distance law match the unknown writing material feature value with the handwriting characteristic feature database, export the label of the known hand writing materials which is most similar to the unknown material with minimum European Distance, and then we can confirm who is the author of the unknown material.

首先将笔迹材料作为图象扫描输入，并对其进行编号。预处理部分可将笔迹图象的有效部分规范化到一个统一尺寸，接着对其进行二值化和去除噪声的处理，以便于更好的提取图像的特征。在此我们采用了灰度共生矩阵法提取手写笔迹材料的纹理特征，与以往有所不同的是，我们将一份手写材料分割成64块大小为80*80象素的子图象，每个小块都从四个方向（0度、45度、90度以及135度）来更全面的提取特征，并计算出四个最主要的特征值（纹理一致性的统计量、纹理反差的统计量、纹理熵的统计量以及纹理灰度相关性的统计量），将从所有已知材料提取的特征值保存到纹理特征库中，对于待检手写材料，同样采用灰度共生矩阵的方法提取其纹理特征，再利用最小欧氏距离分类法将从待检手写材料中提取的特征值与纹理特征库中的特征值进行比对，与欧氏距离比对值最小的相匹配，输出匹配成功的原材料的标号，进而识别出待检材料书写者的身份。

In order to solve the problem that the multi-velocity sampling is difficult to calculate the broadband correlative processing ectypes, a calculation method based on the anti-confusion chirp Z transform is presentedfor broadband correlative ectype fast Fourier transform in this paper.

针对多速率采样难以实现宽带相关处理副本求解的问题，提出了通过CZT变换求解宽带相关副本FFT的计算方法。

Signal processing ; chirp Z transform; broadband correlative ectype ; fast Fourier transformalgorithm

信号处理； CZT变换；宽带相关副本； FFT算法

The stretch processing technology of MMW chirp-subpluse stepped-frequency radar is analyzed and the chosen criteria of Fast Fourier Transformation size and sampling interval are given.

研究了毫米波调频步进雷达Stretch处理中快速傅里叶变换点数和采样间隔的选择原则。

The generalized chirp-like sequence has the ideal periodic auto-correlation function, optimum periodic cross-correlation function and low peak-average power ratio.

广义线性调频序列具有理想的周期自相关特性和最优的互相关特性，以及低峰均功率比特性，因而被用作训练序列来估计每个用户的时间偏移。

Take SKF as the leading general conventional bearing, the host pushes the NSK exquisite precise low chirp small gulley ball bearing, the German FAG multi-purpose combination angle contact bearing, the SKF series metallurgy mine adjusts the heart roller bearings and so on

以SKF为主导的通用常规轴承，主推NSK精工的精密低噪小型深沟球轴承，德国FAG的万能组合角接触轴承，SKF系列的冶金矿山调心滚子轴承等

R Declercq has previously demonstrated why a handclap in front of the stairs of the great pyramid of Chichen Itza, in Mexico, has an echo that sounds like the chirp of a beautiful bird called a quetzal.

eclercq博士先前曾证明：在墨西哥奇琴伊察的大金字塔台阶前拍一下手掌，会发出像当地一种美丽的鸟--夸特扎尔所发出的声音。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。