相加混頻 的英文怎麼說
中文拼音 [xiāngjiāhúnbīn]
相加混頻
英文
additive mixing-
From theoretical analysis, we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value, detection or square in the process of generalized demodulation analysis, such phenomenon will result in some superfluous frequency composition on the frequency spectrum, which will puzzle the detec tion of mechanical vibration. if the sampling frequency is selected from a suitable range, the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling
現有的解調分析方法存在以下三種局限性：將不包括調制信息（故障信息）的兩時域相加信號，也以其頻率之差作為解調信號而解出；廣義檢波濾波解調分析中，由於取絕對值、檢波或平方過程可能產生混頻效應，在解調譜中表現為無法分析的頻率成分，並由此推導出避免這種混頻現象的采樣頻率的選取范圍，從根本上避免此類誤診斷的產生；幾種細化解調分析新演算法中，因為無法在細化分析的選抽時進行數字低通濾波，有可能會出現調制頻率的高次諧波成分發生頻率混疊而反折到低頻部分的現象。Three characteristic features, such as average velocity of sound, deviation coefficient of sound velocity, and deviation coefficient of amplitude are extracted from four kinds of testing data which are sound velocity, amplitude, frequency and waveform in this paper. fuzzy analysis and artificial neural network are combined to form an intelligent system with similar functions to human brain to classify grc, aerated concrete, hollow brick, solid brick and concrete block. the accuracy of this system is up to 95 % in field tests
由超聲脈沖法獲得4種檢測信息聲速、波幅、頻率和波形，從中提取3個特徵量：平均聲速、聲速的離差系數和波幅的離差系數，利用模糊分析方法和人工神經網路相結合對grc 、加氣混凝土、空心磚、實心磚、砌塊5種墻體材料進行種類識別，形成一個智能化的、具有類似人腦功能的系統.經現場實測證明，判別的準確率達95 %以上。Using dead reckoning would lead to frequent state correction updates, increasing both network traffic and visible jolts ( because a quick position jump is sometimes needed when the blended replicated path differs to much from the original path )
使用導航預測演算法可能會導致非常頻繁地發送狀態校正更新包，網路流量和視覺上的震動都會大大增加（因為當混合后的復制體路徑與原始路徑相差較大時，有時候不得不做一些迅速的位置跳轉） 。Near several years, the lawsuit was continuously perplexing to register the one catastrophe topic of cpa ' s trade, and especially supervising enlarging of dynamics along with verifying the certificate audit vocational work, more and more cpas arc frequently pushed the defendant ' s scat by the quilt, are asked to undertake administration, economy and even criminal responsibility, no doubt among them has one side of cpas " delinquency, but the different views of the concerned department and the society public to cpa audit law duty, as well as the deviation and confusion from these is taking the very important effect, too
近幾年來，法律訴訟一直是困擾著注冊會計師行業的一大難題，特別是隨著對證券審計業務監管力度的加大，越來越多的注冊會計師們被頻繁地推上被告席，被要求承擔行政、經濟乃至刑事責任，其中固然有注冊會計師失職的一而，但有關部門和社會公眾對注冊會計師審計工作應承擔的法律責任的性質的不同看法，以及由此引起的相關法律規定的偏差和混亂也在其中起著不可忽視的作用。Simulation results demonstrate theoretical derivation is correct and both sequences can be used in communication. based on the presented ds / sfh communication scheme, and employing msk as fh spread spectrum modulation, the performance is studied n the presence of partial band multitone jamming and additive white gaussian noise ( awgn )
根據所提出的混合ds sfh擴頻通信系統方案，採用msk相干調制，在假設直接序列擴頻后信號帶寬等於跳頻間隔的情況下，推導了系統在部分頻帶多頻干擾和加性白噪聲下的誤比特率公式。分享友人