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- Time frequency coding underwater acoustic communication 時(shí)頻編碼水聲通信技術(shù)研究
- Under the condition of zero Doppler frequency shifts,this kind of"waveform pair"is equivalent to polyphase Barker coded waveform at costs of a small amount of loss in signal-to-noise ratio and widening of the bottom of mainlobe. 在零多普勒頻移條件下，這類(lèi)“波形對”能以少量信噪比損失為代價(jià)使脈壓輸出波形的主旁瓣比等于碼序列的長(cháng)度，也就是說(shuō)，從主旁瓣比的角度講，這類(lèi)“波形對”可以等效為相應長(cháng)度的多相巴克碼波形。
- time frequency coding 時(shí)頻編碼
- It is possible that the computer is of low grade, and the time frequency is too low, please change for a new computer. 有可能是主機檔次太低,時(shí)鐘頻率過(guò)低,請更換主機。
- This paper proposes a new method based on time frequency analysis to detect spikes automatically. 本研究提出了一種基于時(shí)頻分析的癲癇腦電棘波檢測方法。
- It is discussed how to use CPLD to design an arbitrarily combinatorial coding waveform generator in this paper. 討論了如何使用可編程邏輯器件設計任意組合編碼波形發(fā)生器。
- Secondly, to the nonstationarity of diesel engine noise, this paper focuses on the extraction of time frequency feature using wavelet scalogram. 其次針對噪聲信號的非平穩性，研究基于小波尺度譜噪聲分量的時(shí)頻特征分析。
- First edition video frequency encoder design books, extremely easy to understand, but speaks the video frequency code in principle and the design method is very thorough. 一本原版的視頻編碼器設計圖書(shū),非常易懂,但是將視頻編碼中的原理和設計方法講的很透徹。
- M. Akay, "Time Frequency and Wavelets in Biomedical Signal Processing," Endorsed by IEEE Engineering in Medicine and Biology Society, pp.211-420, 1998. 翁國正，“應用小波系數臨界法于消除助聽(tīng)器背景噪音之技術(shù)”，國立成功大學(xué)電機工程學(xué)系碩士論文，民國九十二年。
- Taking Time Frequency Distribution (TFD) of the radar signal as an image, the method uses image processing algorithm for extracting its singular value. 該方法把雷達信號的時(shí)頻分布作為一幅圖像進(jìn)行處理，利用圖像處理算法提取其奇異值特征。
- Minimum Peak Sidelobe Filters for 11-Bit Barker Coded Waveform 11位巴克碼信號的最小峰值旁瓣濾波器
- As planetary healers, we must become aware of the galactic time frequency and learn how to use the natural harmonics of time to our advantage. 身為行星的治療者，我們必須意識星際時(shí)間頻率，學(xué)習如何使用自然和諧的時(shí)間，成為我們的優(yōu)勢。
- It shows that since 1999 the seismic activity mainly belongs to the tectonic event based on a seismic spectral and time frequency analysis. 火山地震的頻譜分析和時(shí)頻分析結果表明，自1999年以來(lái)發(fā)生的火山地震主要為構造型火山地震。
- The time frequency analysis remedies the defect that short Fourier translation (SFT) has the same time resolution and frequency resolution to different frequency ranges. 該方法克服了SFT（短時(shí)Fourier變換）分析對高、低頻段具有相同的時(shí)間分辨率和頻率分辨率的缺點(diǎn)，彌補了小波變換只能粗糙地模擬基底膜帶通濾波器特性的不足。
- Using computer simulation, the results show that fluctuating wind synthesis with time frequency nonstationarity can reflect normal characteristic of fluctuating wind. 通過(guò)計算機仿真分析，結果表明小波重構合成的脈動(dòng)風(fēng)具有良好的時(shí)頻非平穩性，能夠反映脈動(dòng)風(fēng)特性；
- SAW MINIMUM PEAK SIDELOBE FILTER FOR 15bit m-SEQUENCE PHASE CODED WAVEFORM SAW 15位m序列相位編碼信號的最小峰值旁瓣濾波器
- Combined with the basic principle and method of the radar multitarget resolving,the application of time frequency analysis is discussed for nonrigid multitarget resolving. 從雷達多目標分辨的基本原理和方法出發(fā),探討了時(shí)頻分析在雷達非剛性多目標分辨中的應用問(wèn)題。
- In this research, we use chirp excitation, which is one of coded waveforms as an attempt to improve CTR by increasing pulse length and maintain the axial resolution by received pulse compression. 本研究將進(jìn)一步應用編碼波形中的高斯啾聲脈沖在脈沖反相基頻影像上，以拉長(cháng)脈沖的方式取代提升脈沖峰值來(lái)增加脈沖能量，可提升影像之訊雜比且避免破壞氣泡與組織，然后利用壓縮濾波器壓縮回波訊號，恢復因脈沖拉長(cháng)而下降之軸向解析度。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就會(huì )發(fā)酵。
- Time is sometimes called the fourth dimension. 時(shí)間有時(shí)被稱(chēng)為第四度空間。
