nature frequency 中文意思是什麼

nature frequency 解釋
固有頻率
  • nature : n 1 自然(現象) 大自然;自然界;自然力;〈擬人化時作 N 作陰性用〉造化 造物主。2 自然狀態 原始狀...
  • frequency : n. 1. 屢次,頻仍,頻繁。2. (脈搏等的)次數,出現率;頻度;【物理學】頻率,周率。
  1. Abstract : based on the literature of pe and experience of teaching andtraining practice, the writers put forward three suggestion : 1. coaches must first understand clearly the nature of speed walking training. they must seek out the characteristics of speed walking. 2. speed walking at high speed is the key to technical training due to the fact that the support of two feet disappears temporarily in race walking. 3. improving pace frequency is the main factor in raising the results of speed walking

    文摘:以文獻資料法和教學訓練實踐經驗為主要研究手段,提出3點認識: 1 .教練員首先必須清楚的認識競走項目的性質、特點; 2 .競走存在短暫雙腳支撐消失的事實,高速走是技術訓練的重點; 3 .發展步頻是提高競走運動成績的主要因素。
  2. The temperature effect which has been calculated is taken as " thermal load " forced on the body, then such thermal stress is settled as general elasticity mechanics question ; secondly, the thermal stress is taken as " surface force " forced on the body, and the new system stiffness is formed which include the extra stiffness matrix, then it changes the nature frequency of the structure

    首先,這篇論文介紹溫度場和熱應力場的有限元方法,建立了三維熱傳導模型計算有溫度場產生的熱應力,計算熱應力時運用了一種轉化思維:將溫度處理為「溫度載荷」 ,這樣就能用彈性力學問題的處理方法來求解熱應力。其次,將熱應力作為結構的「面內力」 ,而面內力產生附加的幾何剛度矩陣,改變了結構的剛度,影響了結構的固有頻率。
  3. The heterogeneous nature of rock and soil would prohibit recording the very high-frequency components present in the pulses.

    巖石與土壤的不均勻性質有礙于記錄脈沖中很高的頻率成分。
  4. The waves are sinusoidal in nature, and they have an amplitude and a frequency

    聲波實質上是正弦曲線,它有振幅和頻率。
  5. The relations between the parameters of gas charging and exhausting, heat quantity through the shell of tube ( q ), the length of the tube ( l ), the ratio of gas charging time to gas exhausting time ( ), the frequency of the jet flow ( f ), the ratio of the expansion ( ), the nature of thermal separator and the unsteady flow in the tube were established

    建立了進、排氣參數、管壁散熱量( q ) 、管長( l ) 、充、排氣時間比( ) 、射流頻率( f ) 、膨脹比( )等參數與熱分離機性能及管內非定常流動的關系,並分析了有關因素對熱分離機性能的影響。
  6. It is showed in buffeting analysis that the analysis results in time domain agree well with those in frequency domain. effect of pylon wind field can increase the lateral buffeting response of pylon. nonlinear factor can decrease the nature frequency of cable - stayed bridge, and can increase the vertical and torsional buffeting response

    時域抖振分析結果表明:大跨度斜拉橋抖振的時域和頻域分析方法具有較好的一致性;考慮橋塔風效應會顯著增大橋塔的橫橋向抖振響應;非線性因素會降低斜拉橋的自振頻率,會增大斜拉橋的豎向及扭轉抖振響應。
  7. 38 street washing vehicles also operate day and night with the frequency of street washing ranging from on need basis to at least 2 times weekly depending on the nature of the area served

    此外, 38輛洗街車亦不分晝夜地工作,清洗街道。街道清洗的次數會因應地區而調整,由有需要才清洗至每星期至少兩次不等。
  8. 45 street washing vehicles also operate day and night with the frequency of street washing ranging from on need basis to at least 2 times weekly depending on the nature of the area served

    此外, 45輛洗街車亦不分晝夜地工作,清洗街道。街道清洗的次數會因應地區而調整,由有需要才清洗至每星期至少兩次不等。
  9. Based on the " research on the new method for rotating machine faults diagnosis based on independent component analysis " ( national nature science fund project, no : 50205025 ) and " study on the new method of corba - based distributed calculation tactics construction in remote condition monitoring and diagnosis " ( zhejiang province nature science fund project, no : 501061 ), this paper aimed to the rotating machinery faults diagnosis oriented time - frequency analysis. the emd - based basic theories and methods were studied ; to weaken the emd method ' s end effect, some new data extention means were proposed ; to improve the emd method ' s precision and efficiency, some new algorithms were proposed ; the emd based time - frequency analysis software was designed and developed ; a experiment system at the base of rotor test bed was built to study the ro tor faults diagnosis using the new time - frequency analysis method, then studed several typical faults

    本文結合「基於獨立分量分析的旋轉機械故障診斷新方法的研究」國家自然科學基金項目( 50205025 )和「基於corba分佈計算策略構建遠程監診的新方法研究」省自然科學基金項目( 501061 ) ,以面向大型旋轉機械故障診斷的時頻分析為目標,研究了該方法的基本原理和演算法:針對其端點效應等不足,提出了新的數據延拓技術;針對emd演算法的精度和速度上的不足,提出了新的改進演算法;設計和開發了基於emd時頻分析的軟體系統;以模擬轉子實驗臺為基礎構建了實驗系統,並進行了實驗研究。
  10. The main content of chapter 1 are the analysis of the repetition of the historical phenomenon of money supply fluctuation since the foundation of new china and the discussion about the nature and features of the money supply fluctuation in our country, as well as the fluctuation period, amplitude, frequency and component stages on each cycle

    緒論部分包括文獻綜述、研究方法和邏輯體系。第一章從我國建國以來貨幣供應波動的歷史資料入手,考察了我國貨幣供應波動的性質、特點和各波動周期的長度、波動幅度、頻率及組成階段等。
  11. The strain type parameters compare favorably with the nature frequency and the displacement parameters on detecting structure damage. 2

    在結構損傷識別問題上應變類型的損傷識別指標優于位移、固有頻率等類型的損傷識別指標。
  12. Firstly, the multiple modes and dispersion nature of ultrasonic lamb wave are investigated in theory. furthermore, optimization of excitation signal is performed experimentally with the four parameters : the transport mode, the center frequency, the amplitude and the number of the wave ’ s peak value

    本文首先從理論上分析lamb波的多模式和頻散現象,在理論基礎上結合實驗在傳播模式、中心頻率、信號幅值、波峰數等幾個方面對lamb波進行優化。
  13. The total number of interviews and their frequency depend on the nature of the problem and the urgency. they vary from once every week to once every 2 to 3 weeks

    面談每次約一小時,次數及密度則視乎問題的性質和急切性而定。一般來說,輔導初期面談較為頻密(由每星期一次,至兩三個星期一次不等) 。
  14. Through analyzing the shortages of existing wavelet functions, new wavelet functions which have concentrated energy and good frequency domain localization nature are proposed

    在分析已有小波函數不足的基礎上,構造了新的能量集中、頻域局部性好的小波函數。
  15. These figures remain part of the frequency conversion and filter software is part of the radio group, one of the key technologies, and the use of fpga design, as programmable devices in the programmable nature of the achievement made more flexible system can be seen from the perspective of hardware software

    其中數字前端中的下變頻部分和濾波器組部分是軟體無線電中的關鍵技術之一,而運用fpga來設計,由於可編程器件的可編程性,使得系統的實現更加靈活,可以從軟體的高度來實現硬體。
  16. 3. according to demand of large - scale bridge and civil structure health monitor, a new type of fiber bragg grating accelerometer which has low nature frequency and high sensitivity has been come forth

    3 、本文以大型橋梁和建築結構的健康監測為背景,設計了一種新型的低頻高靈敏度光纖光柵加速度傳感器。
  17. Any mechanical system can vibrate under certain conditions. if the frequency of exciting force caused by external drive or self - unbalance is near the nature frequency of the system, a phenomenon named resonance vibration will occur

    任何機械繫統都會發生振動,當外界激勵或自身不平衡引起的激振力的頻率與系統的固有頻率接近時,就會發生共振。
  18. Then, the modal analysis of two differently typical biomimetic wings are conducted and their modal parameters as nature frequency and vibration modes are obtained. as a result, the plane - structure wings with shell elements for fmav is not ideal comparing with the truss - structure wings composed by shell and pipe elements

    利用ansys軟體對兩種結構類型的仿生翼進行模態分析,得到其低階固有頻率及振型等模態參數,並由結果指出純殼單元平板結構作為微撲翼飛行器的機翼不夠理想,而採用梁單元和殼單元的復合結構是設計微撲翼飛行器機翼的一個方向。
  19. This method uses wavelet transform to pick up the transient fault information because of its multi - resolution characteristics and time - frequency localization nature. fault line is detected based on the modulus maxima or energy comparison under some scale of wavelet transform of phase currents or component current. this method is applicable for such power system as only furnished with ct on two phases, so the shortcoming of other methods presented in recent years is overcome

    即利用相應出線相電流或分量的暫態信息突變量在小波變換某一尺度下模極大值或能量比較來確定故障線路,該方法同樣適用於只裝設兩相ct的小電流接地系統,從而克服了迄今為止提出的一些選線方法在系統只裝設兩相ct時失效的問題。
  20. Firstly, the low frequency vibration of benfield frame is analyzed and tested. the nature and reason of the vibration of benfield frame are analyzed. a modulation theory is suggested and displayed to explain the low frequency vibration reason of benfield frame

    文章首先分析和測試了苯菲爾框架的低頻振動,分析了苯菲爾框架大幅低頻振動的性質和原因,提出了造成框架振動的低頻調制理論。
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