frequency identify 中文意思是什麼
frequency identify
解釋
頻率鑒定號碼-
Fid fid frequency identify
頻率鑒別號碼 -
Because of the limited cross - range resolution, high frequency ( hf ) over - the - horizon ( oth ) radar has the poor ability to determine the number of group targets and identify the large warship such as aircraft carrier in engineering applications
我國的高頻雷達已進入工程化應用階段，但由於受分辨能力的限制，在群組目標的個數分辨及大型船隻的識別等方面仍有不足之處。 -
A new study reveals that the calls contain frequency changes that dolphins recognize. humans are one of the few animals that use sound modulation instead of simple voice differences to identify individuals
舉例來說，如果是海豚媽媽在呼喊小海豚，那麼人們認為這只小海豚能夠從媽媽的喊叫聲中識別出自己的「名字」 。 -
Experiments show that, when use msp430f149 audio sensor to identify vehicles that contain plane, tank, truck and so on by time domain features and two - level f - ratio, the recognition rate is 82. 1 % ; when use both msp430f149 audio sensor and arm9 sensor to identify vehicles, and the recognition rate is much better than the original system and msp430f149 audio sensor. line spectrum of power spectra and 3 / 2 spectrum is used as frequency features on arm9 sensor, and it is caught by narrow - band bandpass filter
實驗證明，在主頻為8mhz的msp430f149感知器上，採用基於時域特徵和二階f比的識別演算法，能夠實時地完成對飛機、坦克、卡車等交通工具的識別;將msp430f149感知器與基於arm9的高端感知器配合使用，且高端感知器採用功率譜線譜或3 / 2維譜線譜作為頻域識別特徵，能夠實時的對各類交通工具做更高性能的識別。 -
A method to identify the damping parameters of machine joint surface is proposed based on the tested frequency response functions
提出一種基於實測傳遞函數矩陣來識別機械結合面阻尼參數的新方法。 -
With the development of social economy and science technology, rf ( radio frequency ) card technology is more broadly applied by all kinds of trades, specially such as mass transit, wireless communication identify finance trade and safety - defend etc we use usually magnetic card or touch ic ( intelligent card ) in the past, but the shortage is that the card is read - write low efficiency frictional waste and short life, so that it ca n ' t guarantee the reliability of system for long term running
隨著社會經濟和科技的發展，射頻卡技術越來越廣泛地應用於各種行業，特別是公共交通、無線通信、身份識別、金融交易和安全防衛等行業。過去，智能卡應用領域常採用磁卡或接觸式ic卡，但由於讀寫速度慢，易磨損，使用壽命短，無法保證系統長期運行的可靠性和方便性。 -
Bridge can be detected by the transformation of structure mode parameters with the modern technology of signal test. the vibration frequency is obtained easily in the measure, but it is n ' t sensitive to the transformation of mass and rigidity. so it is difficult to identify by test system when the damage of structure reach to the limit damage degree
在實際的工程測量中最容易獲取的結構模態參數就是振動頻率，但是振動頻率對質量、剛度的變化具有弱靈敏性，這使得即使結構的破損程度達到了極限破損程度，振動頻率的變化也很難被測試系統識別。 -
Finally, the nonlinear identification method to stochastic data in frequency domain is used to analyze and identify the nonlinear characteristic of some multifunctional electrical case with honeycomb sandwich structure
最後，將隨機數據的頻域非線性分析與辨識方法應用於某鋁蜂窩夾層結構多功能電子機箱的非線性特性研究中。 -
The honeycomb sandwich structure has been widely utilized in engineering field nowadays. however, due to the complex construction of this structure, it seems not quite easy to describe its dynamic characteristic clearly and completely via conventional methods. the purpose of this thesis is to analyze and identify the dynamic characteristic of honeycomb sandwich structure based on nonlinear methods to stochastic data in frequency domain
現今鋁蜂窩夾層結構廣泛應用於工程領域，但由於鋁蜂窩夾層結構復雜，使得應用傳統的辨識方法難以對其動力學特性給出清楚和完整的描述，本文的目的就是應用隨機數據的頻域非線性分析與辨識方法對鋁蜂窩夾層結構的動力學特性進行辨識。 -
Plenty of experiments show the real, imaginary, module and angle of wavelet transform can accurately choose the fault line and precisely identify the high frequency of transient signals
通過大量的實驗，表明利用小波變換后的實部、虛部、模值以及相角可以準確的給出故障線路並高精度的提取故障信號的暫態高頻分量。 -
A kind of arithmetic of recursive least squares ( rls ) method with forgetting factor combined with model matching of zero frequency was adopted to identify the object online
採用了帶遺忘因子的遞推最小二乘和基於零頻率的模型匹配的聯合辨識演算法對空調系統進行在線辨識。 -
Fid frequency identify
頻率鑒別號碼 -
Then, the hilbert transform is applied to each modal response to obtain the instantaneous amplitude and phase angle time histories. a linear least - square fit procedure is proposed to identify the natural frequency, damping ratios, physical mass, damping and stiffness matrices from instantaneous amplitude and phase angle for each modal response
然後對各階模態響應進行hilbert變換，得到瞬態幅值和相位角的時間歷程，再運用線性最小均方擬合來識別自然頻率、阻尼比、質量、剛度和阻尼矩陣。 -
If we want to monitor the damage of the span lattice roof structure, the wind - induced responses and identification of parameters become the important problems first of all, which also the key technique of the damage monitoring of the structure. the method of time domain parameter identification is superior to the method in frequency domain : the structural response is only needed to identify the parameters of the structure
時域參數識別方法具有頻域方法無可比擬的優點，僅僅需要結構的響應信息，便可實現結構的參數識別，尤其對于大跨空間網格結構，人為激勵往往有很多的弊端，因此，積極發展有效的時域參數識別方法，還是很有現實意義的。 -
Structures. frequency change square ratio is applied as a parameter to locate corrosion and cracking damage. a chart, which relates the loss in stiffness with changes in natural frequencies, is proposed to identify the degree of corrosion and cracking damage
根據結構銹裂損傷前後的頻率平方變化比進行銹裂損傷定位；根據結構銹裂損傷后頻率降低與剛度降低的關系，繪制結構銹裂損傷程度識別圖，用於銹裂損傷程度識別。 -
Xianghongdian concrete gravity - arch dam was analyzed using numerical simulation in this paper. in different place of dam crack with different stripe and various depth was simulated and corresponding vibration frequency and shape were given. the frequency of damaged dam polluted by noise was also discussed and the results were presented using statistical neural network to identify
本文對響洪甸重力拱壩進行數值模擬分析，在大壩的不同位置模擬了條數不等的、張開度不同的各種裂縫，並給出了相應的振動頻率和振型，考慮了測試噪聲的影響，並用統計神經網路進行了識別。 -
During the last century, the vhf ( very high frequency ) communication has been applied in the ship ' s transportation, as well as radar and arpa also could identify ships in the marine. but they could n ' t adapt to the needs of the modern navigation because of their limits. the rapid development of the digital communications technology, computer technology and net ware technology supports the needed technology of ais ( automatic identification system )
上個世紀， vhf通信技術被廣泛地應用於船舶通信；雷達、 arpa具有識別船舶的功能，但是由於自身的局限性而無法適應現代航運安全的需求；隨著數字通信技術、計算機技術以及網路信息技術的飛速發展， ais的技術基礎已經搭建好，在航運界對助航設備的要求越來越高的情況下，船舶自動識別系統應運而生。 -
The transient analysis and simulation studies in time - domain showed that the transient capacitance current of busbar is unable to be caught due to the limitation of the given sampling frequency, therefore the transient current singularity of the fault line and the non - fault line will approximate, which prevents to identify the fault line with the criterion calculation result of transient current protection
研究結果表明，線路出口故障時暫態電流保護完全失去選擇性的根本原因是，在給定的采樣頻率的限制下，難以捕捉到過渡過程中極其短暫的母線分佈電容中的暫態電流，從而故障線路與非故障線路暫態電流波形的奇異性相近，根據故障線路和非故障線路的暫態保護判據計算結果不能正確識別故障線路。
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