at random 任意,随便; 任意地,随机地; 随便地,任意地; 随机的,任意的; 随机地,任意地; 随意地,任意地; 随意地,随机地
random n. 〔罕用语〕胡乱行为,偶然的[随便的]行动[过程]。 adj. 1.任意的,胡乱的,随便的;(话等)信口乱说的;(人等)偶然碰到的。 2.随机的;【物理学】无规则的;(石工)(大小)不齐的。 a random guess 瞎猜。 a random shot 乱射(的子弹);流弹。 at random 碰运气地;无目标地,漫无目的地。 n. -icity 随机性,无规性。
signal n. 1.信号,暗号;信号器。 2.动机,导火线 (for)。 3.预兆,征象。 call signal 【无线电】呼号。 an alarm signal 警报(器)。 an information signal 〔美国〕暴风警报(旗)。 an international code of signals 国际通用信号。 a signal of distress =a distress signal 船只失事信号。 adj. 1.暗号的,作信号用的。 2.显著的,非常的,优越的。 a signal victory [defeat] 大胜[败]。 vt.,vi. (〔英国〕 -ll-) 发信号[警报]给(人、船等);用信号[警报]通知(暴风、危险等);用动作[手势]示意;预示。 a signaling bomb 信号弹。
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例句与用法
Correlation characteristic of chaotic sequences have been studied . it demonstrate that chaotic sequences have the same characteristics as chaotic signal . replaced the random signals with chaotic signals , all kinds chaotic switching modulation mode can be obtained 将著名“蔡氏电路”产生的混沌开关调制信号用于buck型dc dc变换器开关的调制控制,使其工作在基于混沌的随机模式。
They are listed below : 1 . i researched the theory of the handset dso sampling and save , i performed the peak sampling by using the current handset dso system which improved the functions of the handset dso and made it possible to observe some random signals 对这款示波器进行详尽的改进需求分析后,我在现有的手持式示波器基础上进行了一些改进的设计,其中包括: 1 .研究数字存储示波器的采样原理和数据存储的原理。
In this dissertation , we study the technologies and application of multimedia information security in the area of digital watermarking . the main contributions of this dissertation are : a newly watermarking algorithm with gray - level image based on dwt and svd is proposed : now , most of the watermarking algorithms hide the random signal or two - value image into the image ; only a few watermarking algorithms hide the gray - level image into the image . in my dissertation , we study the algorithm that hides the gray - level image into the image and gain some result 提出了一种基于dct和svd的一种灰度水印嵌入算法:现在大部分的数字水印技术所嵌入的水印一般是随机信号或者是二值图象,那么用有意义的灰度图象作为水印信号的嵌入技术很少见,本人所提出的这种算法对这方面的技术进行了尝试,提出了一种基于dct和svd的灰度水印嵌入算法,这种算法的先进之处就是嵌入的水印信息是信息量很大的灰度图象。
The research of these systems involves in the branches such as infrared physics , multi - dimension random signal processing , image processing and high speed digital signal processing technology , and so on ; especially it involves in the feature description , target detection , recognition and tracking for the video image signal 该类系统的研究涉及红外物理学,多维随机信号处理,图像分析以及高速数字信号处理技术等多门学科,特别是涉及到图像分析中视频图像序列目标特征描述、检测、识别、跟踪理论与技术研究。
But , the eeg signal that we can acquired is very weak and is badly contaminated by strong background noise , such as electrooculogram ( eog ) , electrocardiogram ( ecg ) , and line noise ( 50hz or 60 hz power frequency interference ) , etc . eeg is a typical non - stationary random signal with a certain extent of non - gaussian and non - linear character 但是我们能够获得的脑电信号一般非常微弱、并伴有很强的背景噪声,是一类典型的非平稳的随机信号,且存在一定的非高斯性和非线性。传统的分析处理方法一般将脑电信号近似认为是线性的准平稳的高斯分布随机信号,这使得分析结果往往不能令人满意、实用性差。
After enough analysis and computer simulation , we sum up that as one potential waveform for " low intercept probability " radar system , chaotic signals provided with the following properties : ( l ) in performance , contrast to normal random signal and noise signals , chaotic radar signal has ideal function , it does n ' t exist the step phenomena , which means it can work in any environment ; ( 2 ) from signal generation and processing aspects , chaotic signals in easy to signal generation a 考虑到mpsv . ar .方法实现的复杂性和ls一ar方法的性能不能令人满意,首次提出了神经网络建模预测混沌序列和谱分析技术相结合(即nn一ar )作参数估计的方法,对此进行了必要的理论分析,得到了较好的仿真结果,可以在性能和复杂度方面取得较好的平衡。
In this paper the phase space of the time series of nature field is reconstructed by the theory of phase space reconstructing and g - p algorithm , the results show that the phase space of nature filed has the chaotic attractor , although the nature field is similarity with random nature signal , it has intrinsic certainty random signal and is likely to chaotic 利用相空间重建理论与g - p算法对大地电磁场的时间序列进行相空间重构,表明大地电磁场时间序列相空间的吸引子是存在的,大地电磁场虽然看似随机的天然信号,事实上它是具有内在确定性的随机信号。