抽樣 [統(tǒng)計(jì)] sample; sampling; specimen; samples draw 按比例抽樣樣品 quota sample; 重復(fù)抽樣 duplicate sampling; 概率抽樣 (法) probability sampling; 從不同的零件中抽樣檢查 test the samples from different parts; 有意抽樣 purposive sampling; 隨機(jī)抽樣 random sampling
Applicability of sampling theory in detect technique by phase approaching of projected grating 投影柵相位法檢測技術(shù)中抽樣定理的適用性
Sampling theorem to periodic non - continuous signal from cavitation of piezoelectric pump 抽樣定理在周期性非連續(xù)信號的壓電泵氣穴現(xiàn)象中的應(yīng)用方法
The history of sampling theorem in wavelet subspaces is presented in section 1 . some results and preparing works are showed in section 2 第一節(jié)給出了小波子空間上抽樣定理的發(fā)展?fàn)顩r;第二節(jié)呈現(xiàn)出已知結(jié)果和準(zhǔn)備情況。
( 4 ) periodicity and pseudo - modulation when sampling sinusoidal signals the periodicity and pseudo - modulation due to non - integral sampling of sinusoidal signal are analyzed 著重討論連續(xù)信號采樣過程中抽樣定理對正弦信號的非整數(shù)抽樣序列的周期性,偽調(diào)制性和調(diào)制周期的周期性。
In this paper the theory of microscanning is described and the process of imaging of microscanning is simulated theoretically , meantime , the possibility of improving the quality of image using microscanning is deduced from the sampling theorem 詳細(xì)介紹了微掃描的原理,并對微掃描的成像過程進(jìn)行理論建模,從抽樣定理推論出采用微掃描技術(shù)對改善圖像質(zhì)量的可能性。
In this thesis , summarized the basic theories of fourier transformation and the fast fourier transformation that are generally adopted to detect and analyze the electric power harmonic in the electric power supply system . at the same time , summarized the even sample principle , the phenomenon of frequency mix , the window functions and the frequency leaking as so on , those are closely - related to sample from figure signal 簡要闡述了電力系統(tǒng)諧波檢測分析所普遍采用的傅利葉變換和快速傅利葉變換的基本理論以及與數(shù)字信號采樣密切相關(guān)的均勻抽樣定理、頻譜混疊現(xiàn)象、窗函數(shù)和頻譜泄漏等的基本理論。
Summarized no - line loads and the present situations of the electric power harmonic pollution in the guangyuan district ' s electric power supply system ; explained the theories of fourier transformation and the fast fourier transformation those are widely adopted by majority scholars to examine and analyze the electric power harmonic in the electric power supply system . summarized the principle of even sample , the frequency mix phenomenon , the window functions and the frequency leaking as so on , those are closely - related to the figure signal 簡要闡述了電力系統(tǒng)諧波檢測分析所普遍采用的傅利葉變換和快速傅利葉變換的基本理論,簡要闡明了與數(shù)字信號采樣密切相關(guān)的均勻抽樣定理、頻譜混疊現(xiàn)象、窗函數(shù)和頻譜泄漏等的基本理論,同時闡述了電力系統(tǒng)的諧波檢測與分析的相關(guān)理論基礎(chǔ)知識。
( 2 ) the characters of the signal for the low voltage electrophoresis chip , signal processing theory such as the nyquist theory , fft , fir filter and the wavelet have been discussed after the learning of low voltage electrophoresis theory and the analyzing of the low voltage electrophoresis chip 2在深入了解重慶大學(xué)微系統(tǒng)研究中心研制的低電壓分離電泳芯片結(jié)構(gòu)、原理、信號檢測方式的基礎(chǔ)上,分析了毛細(xì)管電泳芯片信號特點(diǎn)以及相關(guān)的數(shù)字信號處理方法(奈奎斯特抽樣定理、傅立葉變換、有限長單位沖激響應(yīng)( fir )濾波器、小波變換) 。