frequency separation 中文意思是什麼

The mice showed also ageing - associated decline in oocyte quality, as indicated by increased frequency of premature chromatid separation, spindle disruption and / or chromosome misalignments in mii oocytes of aged mice. the gv oocytes from aged mice normally matured in vitro. the percentages of pronuclear - stage embryos, 2 - cell embryos and blastocyst derived from mii oocytes of aged mice by in vitro fertilization ( ivf ) were comparable with ones of young mice, but pronuclei formed 1 h later in aged mice than in young mice

老齡小鼠gv期卵母細胞能正常體外成熟；老齡小鼠m期卵母細胞經體外受精后形成原核期胚、 2 -細胞期胚和囊胚的比率與年輕小鼠比較無顯著差異，但原核形成時間延遲1小時；在老齡小鼠卵母細胞，注射牛精子抽提物或sr ~ （ 2 + ）處理時所誘發的ca ~ （ 2 + ）振蕩以及在減數分裂成熟及早期胚胎中的pkc分佈未發生改變。

High frequency ultrosonography in diagnosis of separation of symphys is pubis in later pregnant women

高頻超聲對妊娠晚期恥骨聯合分離癥的診斷價值

The function of video frequency gathering board is to reveal the compound television signal from the computer to carry on a / d transforms, rgb separation processing and so on, output 24bits rgb signals and the synchronized signals. these functions were finished by video frequency decoding chip saa7111 made by philip corporation

視頻採集板的功能是利用philip公司的視頻解碼晶元saa7111 ，對計算機顯卡輸出的復合電視信號進行a / d轉換， rgb分離等處理，輸出24位rgb信號和同步信號。

Phase separation in la2nio4 studied by low - frequency internal friction technique

體系相分離現象的低頻內耗研究

The system firstly learns the domain training samples by using thesaurus to process word - separation and word - frequency statistics. according to word - frequency distribution, it chooses the feature collection and their weights to formulate feature vector and generate domain model and user model

系統首先對領域訓練樣本進行學習，利用領域詞典對訓練文本進行詞條切分和詞頻統計，並根據詞頻分佈，提取代表採集目標的特徵項集和相應的權重，生成特徵矢量，形成初始領域模型和用戶模型。

Flow separation produces pressure fluctuations of large amplitudes, possibly with the dominant frequencies differ from up - stream blade wake passing frequency and its harmonics

尾緣氣流分離產生的壓力波動頻譜中含有上游葉片尾跡頻率及其倍頻的分量，但其頻譜可能比較復雜，並非單一地受上游葉片尾跡影響。

Flow details of measurement indicate that the coupling of periodic separated flow ( such as low frequency swinging of separation line ) with nozzle flow may cause aft - end internal flow unsteady. recirculation flow gains more energy from the main flow, at the same time the turbulence intensity increases

通過對測量結果的分析，我們認為分離流動的周期性（如分離線的低頻擺動）與噴管流動相耦合，會造成燃燒室尾部流動的非穩態效應增強，增加了迴流區從主流中獲得的能量，也加劇了流場的湍流脈動。

A blind source separation algorithm by using time - frequency signal analysis

一種基於時頻分析的盲信號分離演算法

Rigorous coupled - wave analysis of frequency separation grating used for icf

的分頻光柵的耦合波分析

As to the polyreference implemention of the least - squares complex frequency - domain estimator in mathematical separation technique of modes, this thesis builds a right matrix - fraction description model to estimate the system poles. then frequency point stabilization diagram is set up and analyzed to automatically determine natural frequencies, modal damping ratios and modal participation factors. finally mode shapes are identified based on the least squares theory

對于模態數學分離技術的多參考點最小二乘復頻域識別技術，先建立右矩陣分式頻響模型，識別出系統極點，再通過建立和分析頻率點穩態圖，能自動的確定出結構的固有頻率、模態阻尼比和模態參與因子，最後根據最小二乘原理識別出模態振型向量。

The " expanding in frequency domain " theory is put forward and validated, and the chaos theory and the fractal theory is applied to the detection and diagnosis of boiler tube leak, the separation between the useful signal and noise and some of problems existed in the present boiler tube leak detection are solved

提出了「頻域拓展」的概念，並對這一方法的正確性進行了驗證。將混沌與分形理論引入鍋爐爐管泄漏檢測與診斷中，完成了爐管泄漏聲信號的信、噪分離，解決了目前爐管泄漏檢測系統所存在的一些問題。

We conclude that when the frequency of the external field is resonant with the separation of lateral levels of the quantum wire, 1

論證了當外場頻率與量子線橫向能級間隔匹配時： 1

Abstract : through theoretical analysis with demonstrations, and under the condition of good quality about separation between the leaf and the stem, we recommend frequency convertor as a tool to reduce the power consumption of threshing machine

文摘:通過理論分析並結合實例，在保證葉梗分離質量的條件下，推薦採用變頻器作為降低打葉機電耗的措施

( 2 ) because of t he variability of rock subjected to outside action, three new conceptions : postive damage basic damage and negative damage, are suggested, which can deal with the condition that rock density became large. ( 3 ) the present damage variables based on ct number mostly include ct average number of the rock without damage, which is difficult to measure, so a new damage variable, which includes the average ct number is proposed, on the other hand, strain equal theory is generalized because the one put foreword by lemaitre is not good enough to use. ( 4 ) a axial damage constitutive equation is proposed and testified. ( 5 ) with the circle times, the damage propagation laws of two different rocks, subjected to circle of freezing and thawing, are studied, and in the analysis process, traditional analysis method including average ct number and is used, some important conclusions are reached : inner damage of soft rock containing a large mount of apertures is largely propagating with the time increasement of circle, however, at the preliminary time, the hard rock containing a small mount of aperture is a little propagating, at late time, the influence become large ; ( 6 ) zone separation and statistics frequency put forward is used to analysized the three different damage propagation in the open circumstance, when they are subjected to the different circle times of freezing and thawing, in which the temperature variability is linear, different freezing rate, and different freezing temperature, and no water is supplied during the test

在研究過程中本文主要做了以下工作： （ 1 ）針對巖石損傷變化較小時，運用ct均值和方差分析不方便的缺陷，本文提出運用對ct數范圍劃分區段的方法，根據各區段統計頻率的變化規律來分析損傷擴展狀況； （ 2 ）針對巖石受到外部作用的多變性，本文提出了基準損傷，正損傷，負損傷的概念，在某種程度上考慮了巖石受到外部作用時的壓密情況； （ 3 ）現有的基於ct數的損傷變量大多需要用到巖石基體的ct均值，這實際上是很難觀測到的，因此本文建議了一個可運用巖石初始狀態ct均值的損傷變量，由於現有的勒邁特教授應變等價原理使用上的不便，本文在其基礎上進行了推廣； （ 4 ）建議了一個可用巖石初始狀態ct數和彈性模量的單軸損傷本構方程，並用算例進行了驗證； （ 5 ）對兩種不同巖石在開放環境下受到凍融循環作用且融化過程中補水時，內部損傷隨凍融循環次數增加的擴展規律進行了探討，主要運用了常規的ct均值和ct方差的分析方法進行分析，試驗發現：對于孔隙率和含水率較高，密度和強度較低的軟弱巖石，凍融循環次數對損傷結構的擴展有明顯的影響，而對于孔隙率和含水率較低，密度和強度較高的硬巖，凍融循環次數對其損傷結構擴展初期由於含水率低的原因，影響不是太大，而後期由於水補給后，含水率較高的原因，凍融影響逐漸增大； （ 6 ）運用了本文提出的區段劃分和統計頻率的方法，深入地分析了開放環境下的線性溫度變化的凍融循環次數，凍結溫度，凍結速度不同巖石作用時，其內部損傷隨凍融循環次數，凍結速度和凍結溫度變化的擴展規律，需要指出的是除了在試驗前飽水外，凍融過程中沒有補水。

At first, buck - boost circuit is detailed analyzed and derived strictly in the theory, and on the base, the current of the inductance and the output voltage are analyzed elaborately. when the input voltage is the ac voltage with the nomal frequency, the two variable quantity are analyzed and some conclusions are concluded by means of equal length separation methods and introducing function methods and derivative - equation methods. and this is the basis of the next proceeding

首先，對buck - boost電路進行了嚴謹地理論推導，先對buck - boost電路在輸入為直流電壓時的工作情況進行了分析；在此基礎上，對輸入為工頻交流電壓時的電感電流、輸出電壓作了詳細分析，利用等間距離散化方法、引入函數法、微分方程法分別對變量進行了推導和總結，為下一步工作奠定了理論基礎。

The noise suppression uses two methods ? mlms self - adaptive filter arithmetic and blind signal separation. the lung sounds data analysis uses time domain analysis, frequency domain analysis, power spectra analysis, time - varying spectra analysis and so on. healthy people and lung disease patients ’ lung sounds are collected by the system and the data affirms the reliability and practicability of the system

我們利用該系統對正常人和肺病患者的肺音進行了採集和分析，通過這些分析數據，既肯定了該系統的可靠性和實用性，又對各種肺音分析演算法進行了對比和驗證，對該系統的臨床應用打下了良好的基礎。

However, multipath components can be resolvable due to the autocorrelation of the spread spectrum signal, thus the optimal receiver equals coherent rake reception, i. e. maximum ratio combining the independent components which endure flat fading or frequency non - selective fading. synchronization of pn code and separation of resolvable multipath components need to estimate the exact time delay among the multipath components

但是利用擴頻信號的自相關特性，可分辨多徑可以被有效分離，最優接收機等效為對多個具有獨立平坦衰落通道（或頻率非選擇性通道）特性的多徑信號進行最大比合併，即相干rake接收。

In contrast to phase separation ( curve - fitting ) approaches which are largely mathematical, phase resonance testing is a physical technique. when a structure is vibrating in a normal mode, the undamped natural frequency and normal - mode shap of the structure are directly measured. in the classic phase resonance testing, the test data processing is simpler and the results are more accuracy

相對于相位分離法來說，相位共振法是一種比較直觀的物理識別方法，在結構做「純模態」振動時，通過物理測量直接獲得模態參數;試驗數據處理工作量小，且精度一般比單輸入系統高。

Through the research on the sophisticated physical and mathematical separation technique of modes in experimental modal analysis, this thesis intends to improve the estimated accuracy and efficiency of modal parameters of highly damped structure or structure with close frequency modes and the automatization of the technique in the process of analysis

本文旨在研究實驗模態分析中先進的模態物理分離技術和模態數學分離技術，提高識別大阻尼或模態密集復雜結構模態參數的精確度與效率，提高分析中的自動化程度。

Duplex frequency separation

雙工頻率間隔